Technical Field

One aspect of the present invention relates to a sheet and a kit for a sheet.

Background Art

Sheets that can be adhered to various places that are located inside or outside buildings have been known in the related art. For example, Patent Document 1 describes an image graphic mating web including a major surface including an imageable surface and an opposing major surface including a nonadhesive mating surface for mating with a substrate.

Citation List

Patent Literature

Patent Document 1 : JP 2001-512587 A

Summary of Invention

Technical Problem

Facilitation of attaching and detaching of a sheet has been desired.

Solution to Problem

A sheet according to one aspect of the present invention includes: a film layer including a front face and a back face; and a fastener layer including a first hook-and-loop fastener member that is fixed on at least one part of the back face of the film layer; the first hook-and-loop fastener member including at least one of a loop material or a hook material; a thickness of the hook material being 600 pm or less; and the loop material including a nonwoven fabric or knit being capable of engaging with the hook material.

In such an aspect, since a hook-and-loop fastener member is provided on the back face of the film layer, the sheet can be easily attached or detached.

Advantageous Effects of Invention

According to one aspect of the present invention, attaching and detaching of a sheet can be facilitated.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of a sheet according to an embodiment.

FIG. 2 is a cross-sectional view of an example of a film layer.

FIG. 3 is a diagram illustrating an example of use of a sheet according to an embodiment.

FIG. 4 is a cross-sectional view of a sheet according to an embodiment.

FIG. 5 is a cross-sectional view of a graphic sheet according to a first embodiment. FIG. 6 is a cross-sectional view of a graphic sheet according to a second embodiment.

FIG. 7 is a diagram illustrating an example of use of a projector screen according to a third embodiment.

FIG. 8 is a diagram illustrating an example of use of a whiteboard sheet according to a fourth embodiment.

FIG. 9 is a diagram illustrating an example of use of a sheet for sticky notes according to a fifth embodiment.

FIG. 10 is a diagram illustrating an example of use of a graphic sheet according to a sixth embodiment.

FIG. 11 is a diagram illustrating an example of use of a cover according to a seventh embodiment.

FIG. 12 is a cross-sectional view illustrating an example of use of a cover according to the seventh embodiment.

FIG. 13 is a cross-sectional view of a kit for a sheet according to an eighth embodiment.

FIG. 14 is a diagram illustrating an example of use of a kit for a sheet according to the eighth embodiment.

Description of Embodiments

Embodiments of the present invention will be described in detail below with reference to the attached drawings. In the descriptions of the drawings, identical or similar components are assigned the same reference number, and redundant descriptions thereof will be omitted.

Structure of sheet

A sheet described in the present disclosure includes: a film layer including a front face and a back face; and a fastener layer including a first hook-and-loop fastener member that is fixed on at least one part of the back face of the film layer; the first hook-and-loop fastener member including at least one of a loop material or a hook material; a thickness of the hook material being 600 pm or less; and the loop material including a nonwoven fabric or knit being capable of engaging with the hook material.

The sheet can be easily attached or detached because a hook-and-loop fastener member is provided. In addition, the thickness of the hook material is thin and is 600 pm or less, and a nonwoven fabric or knit being capable of engaging with the hook material may be used as the loop material. Therefore, a hook-and-loop fastener member that is light weighted, that can be easily carried, and that can be flexibly transformed can be obtained. Furthermore, since the thickness of the engaging portion of the hook-and-loop fastener member can be made relatively small, the bulkiness of the sheet after the sheet has been fixed on a supporting surface can be suppressed. Therefore, excellent attachment of the sheet with which the appearance is natural can be achieved.

For the sheet according to the present disclosure, use of the sheet is not limited as shown by various embodiments described below. For example, the sheet may be used as a graphic sheet, a projector screen, a whiteboard sheet, a sheet for sticky notes, or a decorative sheet for interior and exterior for building.

A sheet 1 may be adhered to any tangible object. In the present disclosure,“adhering a sheet” and“attaching a sheet” both indicate fixing the sheet on any tangible object. When the sheet 1 is adhered to a tangible object, the entire sheet 1 may be supported by the tangible object, or at least one part of the sheet 1 may be supported by the tangible object. Therefore, the sheet 1 may be adhered to the tangible object in a manner that the sheet 1 is hung down from the tangible object. The duration for which the sheet 1 is adhered is not limited, and the duration may be a short or long period of time.

FIG. 1 is a cross-sectional view of a sheet 1 according to an embodiment. The sheet 1 includes a film layer 2, a fastener layer 12, and an adhesive layer 13. The film layer 2 and the fastener layer 12 are joined through the adhesive layer 13.

The film layer 2 is a sheet-like member having a front face 2a and a back face 2b.

Corresponding to the fact that the use of the sheet 1 is not limited, the properties of the film layer 2 are not limited. For example, the structure, material, and function of the film layer 2 may be discretionary designed depending on the use of the sheet. The film layer 2 may be transparent or opaque or may be colored. The film layer 2 may have recesses and protrusions formed by emboss finishing or deboss finishing.

The film layer 2 may be a single layer, or may be a laminate of a plurality of layers.

When the film layer 2 includes a plurality of layers, the film layer 2 may include a thin supporting layer. FIG. 2 is a cross-sectional view of an example of a film layer 2 formed from a plurality of layers. In this example, the film layer 2 includes a film 111 forming a surface, a supporting layer 112, and an adhesive layer 113. The film 111 and the supporting layer 112 are joined through the adhesive layer 113. The material of the supporting layer 112 is not limited.

For example, when polyester is used for the supporting layer, the smoothness of the surface of the film layer 2 can be maintained even during the printing using a solvent ink while the film 2 is reinforced. The lower limit of the thickness of the supporting layer 112 may be 25 pm, 35 pm, or 38 pm, and the upper limit thereof may be 100 pm, 80 pm, or 60 pm. The material of the adhesive layer 113 is not limited, and for example, a pressure-sensitive adhesive or a heat- sensitive adhesive may be used as the adhesive layer 113. The structure of the adhesive layer 113 may be the same as or different from an adhesive layer 13 described below.

The thickness of the film layer 2 is not limited. The thickness of the film layer 2 can be changed depending on the use of the sheet. For example, when the sheet is used as a graphic sheet or a decorative sheet for interior and exterior, the lower limit of the thickness of the film layer 2 may be 0.05 mm, and the upper limit of the thickness may be, for example, 0.4 mm, 0.35 mm, 0.3 mm, or 0.2 mm. The thickness of the film layer 2 may be determined taking into consideration ease of handling of the sheet 1 or the film layer 2.

The fastener layer 12 is a sheet-like member to adhere the sheet 1 on any tangible object. The fastener layer 12 includes a first hook-and-loop fastener member. The sheet 1 is adhered to a tangible object by allowing this first hook-and-loop fastener member to engage with a second hook-and-loop fastener member that is fixed on the tangible object. As long as the first hook- and-loop fastener member can engage with the second hook-and-loop fastener member, the specific structure of the first hook-and-loop fastener member is not limited. For example, the first hook-and-loop fastener member may be a loop material, that is, a female member. In this case, the second hook-and-loop fastener member may be a hook material, that is, a male member. Alternatively, the first hook-and-loop fastener member may be a hook material, and in this case, the second hook-and-loop fastener member may be a loop material. The first and second hook- and-loop fastener members may be the Dual Lock (trade name) fastener, and in this case, both of the first and second hook-and-loop fastener members may be mushroom-shaped hook materials. Alternatively, both the first and second hook-and-loop fastener members may include both a hook material and a loop material on the same plane.

The fastener layer 12 includes a loop material 21 as a first hook-and-loop fastener member. The loop material 21 may include a base 2 la and a loop layer 2 lb formed on a first face of the base 2 la as illustrated in FIG. 1. Alternatively, the loop material 21 may be consisted only of the loop layer 2 lb, like a nonwoven fabric. When the loop material 21 includes the base 2la and the loop layer 2 lb, the face on which the loop layer 2 lb exists is the engaging face of the loop material 21. The loop material 21 may include a knit or a nonwoven fabric that is easily engaged with the hook material.

The lower limit of the thickness of the base 2 la may be 5 pm, 10 pm, 15 pm, or 20 pm, from the perspective of achieving excellent engaging strength while excellent mechanical strength is maintained. The upper limit of the thickness thereof may be 100 pm, 85 pm, 70 pm, or 55 pm, from the perspective of achieving lower cost and flexibility. The lower limit of the thickness of the loop layer 2lb may be 0.5 mm, 1.0 mm, or 1.5 mm or greater, from the perspective of achieving excellent engaging strength and achieving durability thereof during repeated attaching and detaching while excellent mechanical strength is maintained. The upper limit of the thickness thereof may be 20 mm, 10 mm, or 2.0 mm, from the perspective of achieving lower cost and excellent flexibility.

The lower limit of the basis weight of the loop material 21 may be, for example, 10 g/m ² , 15 g/m ² , or 17 g/m ² , and the upper limit thereof may be, for example, 80 g/m ² , 50 g/m ² , 30 g/m ² , 25 g/m ² , or 22 g/m ² . This basis weight may be determined based on various perspectives such as maintenance of engaging force with the second hook-and-loop fastener member, ease in detaching from the second hook-and-loop fastener member, and production cost.

When the loop material 21 is a knit, the density of stitch may be 1 stitch/ 1 mm. The fibrous material used to produce the loop material 21 may be a single filament strand, a multifilament strand, or a combination thereof. Note that the multifilament strand can be obtained by, for example, producing a single thread by winding two or more strands together.

The height of the looped pile is not limited; however, for example, the lower limit of the height thereof may be 0.5 mm, and the upper limit may be 0.8 mm or 0.7 mm. The height of the looped pile is a dimension measured from the first face of the base 2 la to the apex of the loop. This height of the looped pile may be determined based on various perspectives such as maintenance of engaging force with the second hook-and-loop fastener member and ease in detaching from the second hook-and-loop fastener member.

The material of the knit is not limited and, for example, may be at least one type selected from the group consisting of poly(tetrafluoroethylene) (PTFE, such as TEFLON (trade name)), aramid (e.g. KEVLAR (trade name)), polyester, polypropylene, and nylon. To produce a desired knit, a fiber material having limited elastomeric characteristics may be used. The elastomer coating composition contains at least one elastomer polymer dissolved in at least one solvent. Representative examples of the elastomer polymer include KRATON (trade name) polymers (e.g. styrene), urethanes, acrylics, silicones, olefins, and copolymers, block copolymers, and other combinations thereof.

When the loop material 21 is a nonwoven fabric, the nonwoven fabric may be a short fiber nonwoven fabric or a long fiber nonwoven fabric. The“short fiber nonwoven fabric” purports to be a nonwoven fabric in which at least a major portion (greater than 50 mass % of the constituent fibers) are configured by staples (in other words, short fibers), and is different from nonwoven fabric configured by filaments (in other words, long fibers). The short fiber nonwoven fabric includes carded nonwoven fabric, air-laid nonwoven fabric, wet-laid nonwoven fabric, and the like. On the other hand, the long fiber nonwoven fabric generally includes spun bond nonwoven fabric and the like. The staples generally may have a fiber length of several hundred mm or less; however, the length is not limited to this.

When a nonwoven fabric is used for the loop material 21, the nonwoven fabric may have air permeability. Examples of the nonwoven fabric include natural fibers and synthetic fibers formed by a publicly known production method, such as spunbond (SB), meltblow (MB), spunbond meltblown spunbond (SMS), and spunlace. Examples of the material of the nonwoven fabric include at least one type selected from the group consisting of nylon, polyester, polypropylene, polyurethane, ethylene-vinyl acetate (EVA), polyethylene, polyamide, polylactic acid, rayon, fibers of copolymers or mixtures thereof, and natural fibers. From the perspective of preventing breakage (e.g. shedding of fibers) of the loop layer 2 lb due to the engagement with the second hook-and-loop fastener member, the loop layer 2 lb may include polyamide with high strength. Alternatively, when material cost or environmental safety is taken into consideration, the base 2 la and/or the loop layer 2 lb may include polyethylene, polypropylene, polyester, or the like.

Regardless of the type and the material of the loop material 21, the engaging face of the loop material 21 may have a region including no loop. In the present disclosure, for convenience, the region including no loop is referred to as“loop-free region”. The method of forming the loop-free region is not limited and, for example, may employ heat sealing. Note that“heat sealing” indicates, for example, partial suppression of standing of the loop by heat sealing and/or hot pressing by using a heating roller or the like. The ratio of the area of the loop-free region relative to the total area of the loop material 21 may be determined based on various perspectives such as maintenance of engaging force with the second hook-and-loop fastener member, ease in detaching from the second hook-and-loop fastener member, and production cost. For example, the lower limit of the ratio thereof may be 5%, 10%, 15%, 20%, 25%, or 30, and the upper limit thereof may be 50%, 45%, 40%, 35%, or 30%. The shape and the arrangement of the loop-free region are not limited. For example, the loop-free region may be arranged in a form of a plurality of lines extended in parallel with each other, may be arranged in a lattice-like form, may be scattered regularly or irregularly, or may be randomly arranged.

The adhesive layer 13 is a layer that joins the film layer 2 and the fastener layer 12. The adhesive layer 13 is provided on at least one part of the back face 2b of the film layer 2, and by fixing the fastener layer 12 to the back face 2b by this adhesive layer 13, a sheet 1 in which the film layer 2 and the fastener layer 12 are incorporated is formed. The adhesive layer 13 may be provided at least one part of the back face 2b of the film layer 2, and in this case, the adhesive layer 13 may be provided at one or a plurality of positions on the back face 2b. When the adhesive layer 13 is provided only at a part of the back face 2b of the film layer 2, the fastener layer 12 may be provided at a part of the back face 2b and, for example, may be provided at a part or the entirety of the peripheral edge. Alternatively, the fastener layer 12 may be provided on the entirety of the back face 2b. The adhesive layer 13 may be provided on the entirety of the back face 2b of the film layer 2, and in this case, the fastener layer 12 is provided on the entirety of the back face 2b.

The material of the adhesive layer 13 is not limited. For example, a pressure-sensitive adhesive or a heat-sensitive adhesive may be used as the adhesive layer 13.

Examples of the pressure-sensitive adhesive used in the adhesive layer 13 include acrylic-based pressure-sensitive adhesives. The acrylic-based pressure-sensitive adhesive contains at least one type of adhesive acrylic-based polymer selected from the group consisting of adhesive acrylic-based homopolymers and copolymers. For example, the acrylic-based pressure-sensitive adhesive contains an adhesive homopolymer of a monomer selected from the group consisting of methyl acrylate, butyl acrylate, isoamyl acrylate, isooctyl acrylate, 2- ethylhexyl acrylate, acrylic acid, methacrylic acid, acrylamide, methacrylamide, acrylonitrile, and ethacrylonitrile, or an adhesive copolymer of two or more of these monomers.

The adhesive homopolymer and copolymer can be obtained by polymerizing the above monomers or a mixture of the above monomers by an ordinary radical polymerization method such as solution polymerization, suspension polymerization, emulsion polymerization, or bulk polymerization. Examples of polymerization initiator that can be used include organic peroxides, such as benzoyl peroxide, lauroyl peroxide, and bis(4-tert-butylcyclohexyl) peroxydicarbonate, and azo-based polymerization initiators, such as 2,2'-azobisisobutyronitrile, 2,2'-azobis(2- methylbutyronitrile), dimethyl-2, 2-azobis(2-methylpropionate), 4,4'-azobis(4-cyanovaleric acid), dimethyl 2,2'-azobis(2-methylpropionate), and azobis(2,4-dimethylvaleronitrile) (AYN). In an embodiment, the lower limit of the weight average molecular weight of the adhesive homopolymer or copolymer may be approximately 200000 or approximately 400000, and the upper limit thereof may be approximately 1000000 or approximately 700000. The weight average molecular weight of the adhesive homopolymer or copolymer is determined by using standard polystyrene by gel permeation chromatography (GPC).

The adhesive acrylic-based polymer may be crosslinked by a crosslinking agent.

Examples of the crosslinking agent that may be used include isocyanate compounds, melamine compounds, poly(meth)acrylate compounds, epoxy compounds, amide compounds, and bisamide compounds, and bisaziridine derivatives of a dibasic acid, such as l, l '-isophthaloyl-bis(2- methylaziridine). As the crosslinking agent, an isocyanate compound (e.g. hexamethylene diisocyanate) may be used and a bisamide compound (e.g. l, l '-isophthaloyl-bis(2- methylaziridine)) may be used. The added amount of the crosslinking agent also depends on the type of the crosslinking agent; however, the added amount of the crosslinking agent is typically from 0.1 parts by mass to 10 parts by mass per 100 parts by mass of the acrylic-based pressure- sensitive adhesive.

A smaller thickness of the adhesive layer 13 is advantageous for nonflammability, and a larger thickness of the adhesive layer 13 increases adhesive strength. From the perspective of balancing nonflammability and adhesive strength, the lower limit of the thickness of the adhesive layer 13 may be, for example, 10 pm or 20 pm, and the upper limit thereof may be 200 pm or 100 pm.

The fastener layer 12 of the sheet 1 includes the loop material 21 as the first hook-and- loop fastener member. On the supporting surface 90 of the tangible object, the hook material 22 is fixed as the second hook-and-loop fastener member corresponding to this fastener layer 12 (loop material 21). The place where the second hook-and-loop fastener member on the supporting surface 90 is fixed is not limited. The hook material 22 may be provided only at a part of the shape and the area that correspond to the sheet 1 and, for example, the hook material 22 may be only provided at the position corresponding to a part or the entirety of the peripheral edge of the sheet 1. Alternatively, the hook material 22 may be provided on the entirety of the shape and the area that correspond to the sheet 1. The shape and the area of the first hook-and- loop fastener (loop material 21) of the sheet 1 may not be identical to the shape and the area of the second hook-and-loop fastener (hook material 22) on the supporting surface 90. Therefore, when the sheet 1 is adhered to the supporting surface 90, it is not necessary for a part of the first hook-and-loop fastener (loop material 21) to be engaged with the second hook-and-loop fastener (hook material 22). Furthermore, at the time of the adhering, it is not necessary for a part of the second hook-and-loop fastener (hook material 22) and the first hook-and-loop fastener (loop material 21) to be engaged. Note that, although it is not illustrated in FIG. 1, the hook material 22 may be fixed on the supporting surface 90 by an adhesive layer or the like.

By employing the first and second hook-and-loop fasteners, the sheet 1 that is adhered to the supporting surface 90 can be easily detached, and furthermore, the detached sheet 1 can be adhered to the supporting surface 90 again. That is, as shown by the arrow A in FIG. 1, the sheet 1 can be freely attached and detached. As illustrated in FIG. 3, by providing the second hook- and-loop fastener member (hook material 22) around the outer edge of the sheet 1, it is possible to spread the sheet 1 on the supporting surface 90 and roll and fix the sheet 1, repeatedly.

Furthermore, after the sheet 1 that has been adhered to a tangible object is detached, the sheet 1 can be adhered to another tangible object or can be adhered again to the same place later. In other words, the sheet 1 can be reused without impairing the quality of the sheet 1.

By appropriately setting the 90° peeling adhesive strength (90° peel strength) of the sheet 1, it is possible to maintain the engaging force while the sheet 1 is being adhered and to achieve ease of detaching of the sheet 1, at the same time. The 90° peeling adhesive strength is a strength measured at the time when the second hook-and-loop fastener member is detached from the sheet 1 and, for example, can be measured by the method stipulated in JIS Z 0237. From the perspective of maintaining the engaging force, the lower limit of the 90° peeling adhesive strength may be, for example, 0.5 N/25.4 mm or 1.0 N/25.4 mm. From the perspective of achieving ease of detaching, the upper limit of the 90° peeling adhesive strength may be, for example, 8 N/25.4 mm, 6 N/25.4 mm, 4 N/25.4 mm, or 2 N/25.4 mm.

FIG. 4 is a cross-sectional view of a sheet 1A according to an embodiment. The sheet 1A includes a film layer 2, a fastener layer 12A, and an adhesive layer 13. The film layer 2 and the fastener layer 12A are joined through the adhesive layer 13. The sheet 1A is different from the sheet 1 in that the first hook-and-loop fastener member does not include a loop material but include a hook material. The fastener layer 12A which is different from the sheet 1 is, in particular, described below.

The fastener layer 12A is a sheet-like member to adhere the sheet 1 A to any tangible object, and includes a hook material 22 as the first hook-and-loop fastener member. The fastener layer 12A may be provided on a part of the back face 2b of the film layer 2 or may be provided on the entirety of the back face 2b.

In an example of FIG. 4, the loop material 21 as the second hook-and-loop fastener member corresponding to the fastener layer 12A (hook material 22) is fixed on the supporting surface 90 of the tangible object. The place, where the second hook-and-loop fastener member on the supporting surface 90 is fixed, can be discretionary chosen, which is the same in the case of the sheet 1. The shape and the area of the first hook-and-loop fastener (hook material 22) of the sheet 1A may not be identical to the shape and the area of the second hook-and-loop fastener (loop material 21) on the supporting surface 90. Therefore, when the sheet 1A is adhered to the supporting surface 90, it is not necessary for a part of the first hook-and-loop fastener (hook material 22) to be engaged with the second hook-and-loop fastener (loop material 21).

Furthermore, at the time of the adhering, it is not necessary for a part of the second hook-and- loop fastener (loop material 21) and the first hook-and-loop fastener (hook material 22) to be engaged. As shown by the arrow A in FIG. 4, the sheet 1A can be freely attached and detached. Note that, although it is not illustrated in FIG. 4, the loop material 21 may be fixed on the supporting surface 90 by an adhesive layer or the like.

The material of the hook material 22 is not limited. For example, the material is a thermoplastic resin and, specifically, may be a polypropylene resin (PP), a polyethylene resin (PE), a vinyl chloride resin (PVC), an ethyl -methyl -methacrylate resin (EMMA), an ethyl- acrylate resin (EA), an ethylene-vinyl acetate copolymer (EVA) resin, a mixture of two or more types of these (e.g. a mixture of a polypropylene resin (PP) and a polyethylene resin (PE), a mixture of a polypropylene resin (PP) and an ethyl-methyl-methacrylate resin (EMMA), a mixture of a polypropylene resin (PP) and an ethyl-acrylate resin (EA), a mixture of a polypropylene resin (PP) and an ethylene -vinyl acetate copolymer (EVA) resin, a mixture of a polyethylene resin (PE) and an ethyl-methyl-methacrylate resin (EMMA), a mixture of a polyethylene resin (PE) and an ethyl-acrylate resin (EA), and a mixture of a polyethylene resin (PE) and an ethylene-vinyl acetate copolymer (EVA) resin). Note that examples of PE include low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE). As needed, additives or the like may be added to these resins.

The hook material 22 includes a base 22a and a plurality of hooks 22b provided on the first face of the base 22a. The face on which the hooks 22b exist is the engaging face of the hook material 22. The shape of the hook 22b is not limited as long as the engaging force is satisfied, and examples thereof include a mushroom shape, a hook shape, a T-shape, or a J-shape.

The dimension of the hook material 22 may be determined based on various perspectives such as reduction in the weight of the sheet, maintenance of engaging force with the second hook-and-loop fastener member, ease in detaching from the second hook-and-loop fastener member, and production cost.

The lower limit of the thickness of the hook material 22 may be 60 pm, 90 pm, or 115 pm, and the upper limit thereof may be 600 pm, 550 pm, 500 pm, 350 pm, 320 pm, or 300 pm. The bulkiness of the sheet 1A fixed on the supporting surface 90 can be suppressed by such reduction of thickness of the hook material 22. When the hook material 22 is used as the first hook-and-loop fastener member, the sheet 1A is thin and light. Therefore, flexibility of the sheet 1A can be ensured, and portability and handleability of the sheet 1A can be further enhanced.

The lower limit of the thickness of the base 22a may be 20 pm, 30 pm, or 35 pm, and the upper limit of the thickness may be 100 pm, 80 pm, 70 pm, or 60 pm. The lower limit of the height of the hook 22b may be 40 pm, 60 pm, or 80 pm, and the upper limit of the height thereof may be 500 pm, 400 pm, 300 pm, 280 pm, or 260 pm.

When the hook 22b is in a mushroom shape, the maximum width and the minimum width of the stem portion (stem) are not limited. For example, the lower limit of the maximum width of the stem portion may be 70 pm or 100 pm, and the upper limit thereof may be 250 pm, 200 pm, or 190 pm. The lower limit of the minimum width of the stem portion may be 50 pm or 80 pm, and the upper limit thereof may be 210 pm, 200 pm, 195 pm, or 185 pm. The maximum width of the umbrella portion (cap) is not limited. The lower limit thereof may be 70 pm, 100 pm, or 200 mih, and the upper limit thereof may be 500 pm, 450 pm, 400 pm, 350 pm, or 300 pm. The lower limit of the protrusion of the umbrella portion from the tip of the stem portion may be 5 pm or 10 pm, and the upper limit thereof may be 90 pm, 85 pm, 80 pm, or 75 pm.

Regardless of the type and the material of the hook material 22, the engaging face of the hook material 22 may have a region including no hook 22b. In the present disclosure, for convenience, the region including no hook is referred to as“hook-free region”. The ratio of the area of the hook-free region relative to the total area of the hook material 22 may be determined based on various perspectives such as maintenance of engaging force with the second hook-and- loop fastener member, ease in detaching from the second hook-and-loop fastener member, and production cost. For example, the lower limit of the ratio thereof may be 5%, 10%, 15%, 20%, 25%, or 30, and the upper limit thereof may be 50%, 45%, 40%, 35%, or 30%. The shape and the arrangement of the hook-free region are not limited. For example, the hook-free region may be arranged in a form of a plurality of lines extended in parallel with each other, may be arranged in a lattice-like form, may be scattered regularly or irregularly, or may be randomly arranged.

Similarly to the sheet 1, by appropriately setting the 90° peeling adhesive strength of the sheet 1A, it is possible to maintain the engaging force while the sheet 1A is put up and to achieve ease of detaching of the sheet 1A, at the same time. The numerical range (the upper limit and the lower limit) of the 90° peeling adhesive strength for the sheet 1A may be set similarly to that of the sheet 1.

When the hook material 22 is used as the second hook-and-loop fastener member corresponding to the sheet 1 illustrated in FIG. 1, the dimension of the hook material 22 can be determined similarly to the case of the sheet 1A. For example, the dimension of the hook material 22 may be determined taking into consideration maintenance of engaging force between the first and second hook-and-loop fastener members, ease in detaching of the sheet 1A from the second hook-and-loop fastener member, or production cost. For example, the lower limit of the thickness of the hook material 22 may be 60 pm, 90 pm, or 115 pm, and the upper limit thereof may be 600 pm, 550 pm, 500 pm, 350 pm, or 320 pm. The lower limit of the thickness of the base of the hook material 22 may be 20 pm, 30 pm, or 35 pm, and the upper limit of the thickness may be 100 pm, 80 pm, 70 pm, or 60 pm. The lower limit of height of each hook may be 40 pm, 60 pm, or 80 pm, and the upper limit of the height thereof may be 500 pm, 400 pm, 300 pm, 280 pm, or 260 pm.

The method of providing each of the sheets 1 and 1A is not limited. For example, each of the sheets 1 and 1A may be provided alone, or may be provided together with the second hook- and-loop fastener member as a kit for a sheet. The kit for a sheet is an article including at least the sheet 1 and the second hook-and-loop fastener member or an article including at least the sheet 1A and the second hook-and-loop fastener member.

The sheets 1 and 1A can be used for various use. The sheets according to the present disclosure are described further in detail below by using some embodiments as examples. First Embodiment

In the first embodiment, the sheet according to an embodiment of the present disclosure is employed in a graphic sheet. The structure of the graphic sheet 10 is described with reference to FIG. 5. FIG. 5 is a cross-sectional view of the graphic sheet 10. The graphic sheet 10 is a print media for visually showing a graphic, which is any visual expression, to people. The content of the graphic is not limited, and examples thereof include characters, symbols, diagrams, illustrations, pictures, or combinations of two or more elements selected from these. The purpose of the graphic is also not limited, and examples thereof include advertisement, entertainment, art, education, warning, caution, or combinations of two or more purposes selected from these.

The graphic sheet 10 includes a printing film layer 11, a fastener layer 12, and an adhesive layer 13. FIG. 5 schematically illustrates a graphic pattern (printed layer) 80 printed on the printing film layer 11.

The printing film layer 11 is a sheet-like member having a printing face l la on which the graphic pattern 80 is printed. The printing film layer 11 is an example of the film layer 2, and the printing face l la is an example of the front face 2a. The back face l lb of the printing film layer 11 is an example of the back face 2b. The material contained in the printing film layer 11 is not limited. Example of a film that can be used include a film containing an acrylic resin that includes polymethyl methacrylate (PMMA), polyurethane (PU), polyvinyl chloride (PVC), polycarbonate (PC), polyolefin such as polyethylene (PE) and polypropylene (PP), polyester such as polyethylene terephthalate (PET) and polyethylene naphthalate, a fluororesin, and a copolymer such as an ethylene-vinyl acetate copolymer (EVA), an ethylene-acrylic acid copolymer, an ethylene -ethyl acrylate copolymer, an ethylene-vinyl acetate copolymer, an acrylonitrile-butadiene rubber (NBR), or an acrylonitrile-butadiene-styrene copolymer (ABS), or a mixture thereof.

From the perspectives of strength, impact resistance, and the like, a film containing polyurethane, polyvinyl chloride, polyethylene terephthalate, an acrylonitrile-butadiene-styrene copolymer, or polycarbonate can be used as the printing film layer 11. The printing film layer 11 can function as a receptor layer of the printing ink and/or as a protective layer to protect the substrate surface from puncture, impact, and the like from the outside. When the printing film layer 11 functions as a receptor layer of the printing ink, the printing film layer 11 may be a film containing polyvinyl chloride or polyurethane from the perspectives of printability, solvent resistance (e.g. alcohol resistance), and the like. To impart flame retardance to the graphic sheet 10, the printing film layer 11 may contain polyvinyl chloride.

The printing film layer 11 may be transparent or opaque or may be colored. In an embodiment, the printing film layer 11 may be colored white from the perspectives of color development and vividness of the image produced by the printed layer arranged directly or indirectly on the printing film layer.

The printing film layer 11 may be a single layer, or may be a laminate of a plurality of layers. When the printing film layer 11 includes a plurality of layers, the printing film layer 11 may have a structure illustrated in FIG. 2, that is, a structure including a supporting layer. The printing film layer 11 may also contain strengthening agents such as plasticizers, fillers, and glass fibers, pigments such as zinc oxide and titanium oxide, and additives such as antioxidants, UV absorbents, heat stabilizers, and nonflammable additives.

The printing film layer 11 may include a brightening layer. As the brightening layer, the printing film layer 11 may also contain a metal thin film containing a metal such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, or germanium, or alloys or compounds thereof, formed by vacuum deposition, sputtering, ion plating, plating, or the like.

The printing film layer 11 may include a surface-protecting layer that covers the printing face l la. The surface-protecting layer may be formed by laminating a film of resin, such as polyester such as polyethylene terephthalate (PET), polyvinyl chloride, polyimide, polyurethane, acrylic resin, epoxy resin, or fluororesin on the printing face l la directly or via a bonding layer, or by applying a resin composition onto the printing face l la and drying. Luster finishing or matte finishing may be implemented on the surface-protecting layer, according to the intended application.

The printing film layer 11 may have recesses and protrusions formed by emboss finishing or deboss finishing. The pattern or design of the recesses and protrusions may be regular or irregular, and is not particularly limited, and examples thereof include parallel lines, wood grain, grainy, pebbled, cloth grain, pearskin, leather dyed pattern, matte, hairlines, spins, characters, symbols, and geometric forms.

The thickness of the printing film layer 11 is not limited. For example, the lower limit of the thickness thereof may be 0.05 mm, and the upper limit of the thickness may be, for example, 0.4 mm, 0.35 mm, 0.3 mm, or 0.2 mm. The thickness of the printing film layer 11 may be determined taking into consideration ease of handling of the graphic sheet 10 or the printing film layer 11.

The graphic pattern 80 can be formed on the printing face l la by using a colorant, such as toner or ink. The technique and apparatus to print the graphic pattern 80 are not limited, and examples thereof include inkjet printing, gravure printing, electrostatic printing, screen printing, or offset printing. As the printing ink, solvent-based ink or UV curable ink can be used. Various thicknesses of the printed layer may be employed. When solvent-based ink is used, typically, the lower limit of the thickness may be approximately 1 pm or approximately 2 pm, and the upper limit of the thickness may be approximately 10 pm or approximately 5 pm. When UV curable ink is used, the lower limit of the thickness may be approximately 1 pm or approximately 5 pm, and the upper limit of the thickness may be approximately 50 pm or approximately 30 pm.

The structures of the fastener layer 12 and the adhesive layer 13 are the same as those in the sheet 1. By the fastener layer 12, the graphic sheet 10 can be adhered to a place for posting the graphic pattern 80. Note that the“place for posting” is an example of the tangible object to which the sheet is adhered. The printed graphic sheet 10 may be adhered to a surface of any tangible object indoors or outdoors and, for example, may be adhered to a surface of external walls, internal walls, ceilings, floors, pillars, glass, bulletin boards, or other structures. The duration for which the graphic sheet 10 is posted is not limited, and the duration may be a short or long period of time.

Also for the graphic sheet 10, the place where the second hook-and-loop fastener member on the supporting surface 90 is fixed is not limited. Furthermore, the shape and the area of each of the first hook-and-loop fastener (loop material 21) and the second hook-and-loop fastener (hook material 22) are not limited. Furthermore, the positional relationship of the first hook-and- loop fastener (loop material 21) and the second hook-and-loop fastener (hook material 22) is not limited. As shown by the arrow A in FIG. 5, the graphic sheet 10 can be freely attached and detached. The 90° peeling adhesive strength (90° peel strength) of the graphic sheet 10 is set similarly to those of the sheets 1 and 1A.

The method of providing the graphic sheet 10 is not limited. For example, the graphic sheet 10 may be provided alone, or may be provided together with the second hook-and-loop fastener member (hook material 22) as a graphic kit. The graphic kit is an article including at least the graphic sheet 10 and the second hook-and-loop fastener member (hook material 22).

Second embodiment

Also in the second embodiment, the sheet according to an embodiment of the present disclosure is employed in a graphic sheet. The structure of the graphic sheet 10A is described with reference to FIG. 6. FIG. 6 is a cross-sectional view of the graphic sheet 10A. The graphic sheet 10A is different from the graphic sheet 10 according to the first embodiment in that the graphic sheet 10A does not include a loop material but includes a hook material as a first hook- and-loop fastener member.

The graphic sheet 10A includes a printing film layer 11, a fastener layer 12A, and an adhesive layer 13. FIG. 6 schematically illustrates a graphic pattern 80 printed on a printing face 1 la of the printing film layer 11.

The structures of the fastener layer 12A and the adhesive layer 13 are the same as those in the sheet 1A. Also for the graphic sheet 10A, the shape and the area of each of the first hook- and-loop fastener (hook material 22) and the second hook-and-loop fastener (loop material 21) are not limited. Furthermore, the positional relationship of the first hook-and-loop fastener (hook material 22) and the second hook-and-loop fastener (loop material 21) is not limited. As shown by the arrow A in FIG. 6, the graphic sheet 10A can be freely attached and detached. The 90° peeling adhesive strength of the graphic sheet 10A is set similarly to those of the sheets 1 and 1A.

The method of providing the graphic sheet 10A is not limited. For example, the graphic sheet 10A may be provided alone. Alternatively, a graphic kit including at least the graphic sheet 10A and the second hook-and-loop fastener member (loop material 21) may be provided. Third embodiment

In the third embodiment, the sheet according to an embodiment of the present disclosure is employed in a projector screen. FIG. 7 is a diagram illustrating an example of use of a projector screen 31 according to the present embodiment. The projector screen 31 is an article onto which an image from a projector 200 is projected. The image projected onto the projector screen 31 may be an animated or still image. The content of the image is not limited. The projector screen 31 has the same structure as that of the sheet 1 or the sheet 1A and is adhered to a supporting surface 90. As an example, the film layer 2 may include a white PVC film in which the surface has been subjected to matte treatment, and a supporting layer that is to support this PVC film and that is formed from PET. As the PVC film, a Scotchcal (trade name) film, available from 3M, may be used. The structure of the film layer 2 is, of course, not limited as described above as long as it is a film having light reflection characteristics or the like to function as the projector screen 31. The image irradiated from the projector 200 is projected on a surface 2a of the film layer 2.

(Fourth Embodiment)

In the fourth embodiment, the sheet according to an embodiment of the present disclosure is employed in a whiteboard sheet. FIG. 8 is a diagram illustrating an example of use of a whiteboard sheet 32 according to the present embodiment. The whiteboard sheet 32 is an article on which writing by a writing instrument such as a marker can be recorded. The writing written on the whiteboard sheet 32 can be erased. The whiteboard sheet 32 has the same structure as that of the sheet 1 or the sheet 1A and is adhered to a supporting surface 90. Examples of the film layer 2 include whiteboard films PWF-500 and WH-200, available from 3M; however, as described above, the structure of the film layer 2 is not limited as long as it is a film having writability, erasability, and antiglare properties that allow the use as a whiteboard sheet 32. The writing is recorded on a surface 2a of the film layer 2.

(Fifth Embodiment)

In the fifth embodiment, the sheet according to an embodiment of the present disclosure is employed in a sheet for sticky notes. FIG. 9 is a diagram illustrating an example of use of a sheet for sticky notes 33. The sheet for sticky notes 33 is an article to put up sticky notes. The sheet for sticky notes 33 has the same structure as that of the sheet 1 or the sheet 1A and is adhered to a supporting surface 90. Examples of the film layer 2 include the Scotchcal (trade name) graphic film IJ1220N, available from 3M; however, as described above, the structure of the film layer 2 is not limited as long as it is a film to which sticky notes, such as various Post-it (trade name) notes, available from 3M, can be adhered. A surface 2a of the film layer 2 functions as a surface to put up sticky notes.

The sheet according to an embodiment of the present disclosure may have both functions of the whiteboard sheet 32 and the sheet for sticky notes 33. That is, one piece of the sheet 1 or the sheet 1A may be used to perform both the recording of writing by a writing instrument and the posting of sticky notes.

(Sixth Embodiment)

In the sixth embodiment, an example where a graphic sheet 10 is adhered to a supporting surface 90 that can be subjected to sewing is described. More specifically, the graphic sheet 10 is adhered to clothes or fabric. FIG. 10 is a diagram illustrating an example of use of a graphic sheet 10. In this example, the supporting surface 90 is fabric constituting clothing 220. The hook material 22 that functions as the second hook-and-loop fastener member is fixed onto the supporting surface 90, i.e. clothes or fabric, by being sewn. The graphic sheet 10 is adhered to the hook material 22. In the example of FIG. 10, the graphic sheet 10 functions as a race bib; however, the function of the graphic sheet 10 is not limited. Examples of the film layer 2 include the Scotchlite (trade name) reflective graphic film 780mC-l0R, available from 3M; however, as described above, the structure of the film layer 2 is not limited to this.

By attaching the sheet according to an embodiment of the present disclosure to clothes or fabric in a manner that the sheet can be attached and detached, the sheet can be easier attached and detached compared to the case where a safety pin is used. Furthermore, since a safety pin is not used, deterioration in comfort when the clothing is worn can be avoided. Furthermore, by using the sheet according to an embodiment of the present disclosure, the sheet adhered to the fabric can be reused.

Although FIG. 10 illustrates a graphic sheet 10, a graphic sheet 10A may be used. (Seventh Embodiment)

In the seventh embodiment, the sheet according to an embodiment of the present disclosure is employed in a decorative sheet for interior and exterior 34 which is a decorative sheet that can be used in at least one of interior or exterior of buildings. This decorative sheet for interior and exterior 34 can be used as a sheet to decorate at least one of surfaces of inside and outside of buildings. The decorative sheet for interior and exterior 34 can function as a cover to hide at least one part of recesses and protrusions formed on an interior or exterior decoration. FIG. 11 is a diagram illustrating an example in which the decorative sheet for interior and exterior 34 is used as a cover. In this example, the supporting surface 90 has a recess portion 91 and a protruding portion 92. The decorative sheet for interior and exterior 34 has the same structure as that of the sheet 1 or the sheet 1A and is adhered to a supporting surface 90, such as a wall. The decorative sheet for interior and exterior 34 may have a size that is necessary to cover the recess portion 91 or the protruding portion 92. The recess portion 91 and the protruding portion 92 can be hidden by fixing the second hook-and-loop fastener member at least one part of the peripheral edge portion of the recess portion 91 and the protruding portion 92, adhering the decorative sheet for interior and exterior 34 onto the second hook-and-loop fastener member. Examples of the film layer 2 of the decorative sheet for interior and exterior include the DI-NOC (trade name) film, available from 3M; however, the structure of the film layer 2 is not limited thereto. For example, the film layer 2 may be a decorative film formed by subjecting a vinyl chloride-based resin layer or an olefin-based resin layer to decorative printing by screen printing or gravure printing and then subjecting the surface to emboss finishing or the like.

FIG. 12 is a diagram illustrating the hiding of the recess portion 91 and the protruding portion 92 and corresponds to a XII-XII line cross section of FIG. 11. FIG. 12 illustrates an example where a sheet 1 is used as the decorative sheet for interior and exterior 34 and a hook material 22 is used as the second hook-and-loop fastener member. By the first and second hook- and-loop fastener members, the decorative sheet for interior and exterior 34 can be adhered to the supporting surface 90 in a manner that the decorative sheet for interior and exterior 34 does not recess along the shape of the recess portion 91. Since the decorative sheet for interior and exterior 34 adhered to the supporting surface 90 maintains a flat condition, existence of the recess portion 91 can be hidden by the decorative sheet for interior and exterior 34. Furthermore, space is formed between the supporting surface 90 and the cover by the first and second hook- and-loop fastener members. Therefore, the decorative sheet for interior and exterior 34 can be adhered to the supporting surface 90 in a manner that the decorative sheet for interior and exterior 34 does not protrude along the shape of the protruding portion 92 while the protruding portion 92 is contained in this space. Since the decorative sheet for interior and exterior 34 adhered to the supporting surface 90 maintains a flat condition, existence of the protruding portion 92 can be hidden by the decorative sheet for interior and exterior 34.

FIGS. 11 and 12 illustrates an example where the decorative sheet for interior and exterior 34 is used to hide the recesses and protrusions on the supporting surface 90; however, the decorative sheet for interior and exterior 34 may be adhered to the supporting surface 90 having no recesses and no protrusions. In this case, the second hook-and-loop fastener member may be fixed to the substantially entirety of the supporting surface 90.

(Eighth Embodiment)

As described above, a kit for a sheet including the sheet and the second hook-and-loop fastener member according to an embodiment of the present disclosure may be provided. The kit for a sheet may further include an adhesive layer having low tackiness that is provided between the second hook-and-loop fastener member and a supporting surface. In the eighth embodiment, a kit for a sheet provided with an adhesive sheet containing the adhesive layer having low tackiness is described.

The case often occurs where the second hook-and-loop fastener member fixed to a supporting surface is required to be detached after the use. However, when the supporting surface is a wall on which a wallpaper of polyvinyl chloride foamed material or the like is adhered, the supporting surface is very fragile. Thus, when the second hook-and-loop fastener is peeled off, the wallpaper often peels off together, and the wall surface is often damaged. The eighth embodiment relates to a structure of a kit for a sheet provided with an adhesive sheet including the adhesive layer having low tackiness which allows the second hook-and-loop fastener member to be peeled off without damaging such a fragile supporting surface.

A kit for a sheet 100 according to the eighth embodiment includes a sheet 1, a hook material 22 which is the second hook-and-loop fastener member, and an adhesive sheet 40 including an adhesive layer having low tackiness 40b. FIG. 13 is a diagram illustrating an example of a structure of the kit for a sheet 100.

The adhesive layer 40b having low tackiness can be provided on a face of the second hook-and-loop fastener member, the face being in contact with the supporting surface 90.“Low tackiness” indicates that the supporting surface 90 is not damaged by the adhesive sheet 40 when the adhesive layer 40b is peeled off from the supporting surface 90, that is, indicates a low adhesive strength at a degree that the supporting surface 90 peels off together with the adhesive sheet 40.

The adhesive sheet 40 includes a substrate layer 40a, an adhesive layer 40b having low tackiness provided on the first main face of the substrate layer 40a, and an adhesive layer 40c provided on the second main face of the substrate layer 40a. The adhesive layer 40b is in contact with the supporting surface 90 when the kit for a sheet 100 is used. A hook material 22 is fixed on the adhesive layer 40c.

The material of the base material layer 40a is not limited. For example, the base material layer 40a may be produced from polyethylene terephthalate (PET), polyurethane, ethylene-vinyl acetate (EVA), polyethylene (unoriented), oriented polypropylene (OPP), paper, or fabric.

The material of the adhesive layer 40b is also not limited. For example, the adhesive layer 40b may be formed by an acrylic-based, rubber-based, or silicone-based adhesive agent. Among these, the silicone-based adhesive agent exhibits low adhesive strength while necessary holding characteristics can be achieved by high wettability although the adhesive strength is low. Therefore, by forming the adhesive layer 40b by using the silicone-based adhesive agent, the adhesive sheet 40 can be peeled off from the supporting surface 90 without damaging the supporting surface 90.

An example of the method of producing the adhesive sheet 40 is described. For example, to produce the adhesive sheet 40, a water-based polyether urethane primer or a solvent-based polyether urethane primer is used as a primer. As the water-based polyether urethane primer, HYDRAN WLI-602 (available from DIC Corporation) is diluted with ultra pure water to a concentration of 10 wt.% for use. As the solvent-based poly ether urethane primer, Polyurethane 3552 (available from Arakawa Chemical Industries, Ltd.) is diluted with methyl ethyl ketone to a concentration of 10 wt.% for use.

As the material of the adhesive layer 40b, PDMS having a functional group at a terminal or having no functional group at a terminal, such as PDMS described in US 8,541,481, and a silicone resin having a MQ structure are used. As an example, TSF451-100M (available from Momentive Performance Materials Japan LLC) can be used as a PDMS having trimethylsilyl as a terminal, and MQ803TF (available from Wacker Chemie AG) can be used as a silicone resin having an MQ structure.

For example, a silicone adhesive is prepared by dissolving 30 parts by weight of a silicone resin in 100 parts by weight of PDMS having trimethylsilyl as a terminal. An adhesive layer 40b is produced by applying a silicone adhesive onto a substrate layer 40a to which a primer has been applied. As an example, the thickness of the adhesive layer 40b is 50 pm. The adhesive layer 40b which has been applied on the substrate layer 40a is cured by electron beam irradiation (40 kGy; acceleration voltage: 210 KeV).

The material of the adhesive layer 40b, the material of the substrate layer 40a, and the method of producing the adhesive sheet 40 described above are examples. The adhesive layer 40b and the substrate layer 40a may be produced by using other materials or other production methods.

The material of the adhesive layer 40c is also not limited. For example, a pressure- sensitive adhesive or a heat-sensitive adhesive may be used as the adhesive layer 40c. The structure of the adhesive layer 40c may be the same as or different from the adhesive layer 13 described above.

Note that the eighth embodiment describes a kit for a sheet 100 including a hook material 22 which is a second hook-and-loop fastener member and an adhesive sheet 40; however, an adhesive layer 40b having low tackiness may be provided on the back face of the hook material 22 which is the second hook-and-loop fastener member. That is, the use of the adhesive sheet 40 including the substrate layer 40a is not necessary.

The shape and the dimension of the adhesive sheet 40 may be set in a manner that the entirety of the second hook-and-loop fastener member is positioned on the substrate layer 40a and the adhesive sheet 40 is extended in at least one part of the outer side around the

circumference of the second hook-and-loop fastener member. For example, the shape and the dimension of the adhesive sheet 40 may be set in a manner that the adhesive sheet 40 is extended in the outer side around the entire circumference of the second hook-and-loop fastener member. By producing the adhesive sheet 40 in this manner, it is possible to easily peel off the adhesive sheet 40, to which the second hook-and-loop fastener member is adhered, from the supporting surface 90.

FIG. 14 illustrates an example of use of the kit for a sheet 100. The operator adheres the adhesive sheet 40 to the supporting surface 90 in a condition where the adhesive layer 40b of the adhesive sheet 40 is faced to the supporting surface 90. By this operation, the hook material 22 adhered on the substrate layer 40a of the adhesive sheet 40 is fixed to the supporting surface 90. Note that the hook material 22 may be not adhered in advance to the adhesive sheet 40, and in this case, the operator may adhere the hook material 22 to the adhesive sheet 40. The sheet 1 can be adhered to the supporting surface 90 after the operator adheres the sheet 1 to the hook material 22 on the supporting surface 90. As described above, the operator can detach the sheet 1 from the hook material 22. When the hook material 22 is detached from the supporting surface 90, the operator needs to peel off the adhesive sheet 40 from the supporting surface 90. By this, the kit for a sheet 100 can be detached from the supporting surface 90 without damaging the supporting surface 90.

The structure of the kit for a sheet is not limited to the present embodiment. For example, the kit for a sheet may include a sheet 1A, a loop material 21 which is the second hook-and-loop fastener member, and an adhesive sheet 40. The adhesive layer 40c may be not the component of the adhesive sheet but may be the component of the second hook-and-loop fastener member.

As described above, a sheet according to one aspect of the present invention includes: a film layer having a front face and a back face; and a fastener layer including a first hook-and- loop fastener member that is fixed on at least one part of the back face of the film layer; the first hook-and-loop fastener member including at least one of a loop material or a hook material; a thickness of the hook material being 600 pm or less; and the loop material including a nonwoven fabric or knit being capable of engaging with the hook material.

In such an aspect, since a hook-and-loop fastener member is provided on the back face of the film layer, the sheet can be easily attached or detached. For example, even when wrinkles or slacking occurred on the sheet during the initial adhering of the sheet to the supporting surface, the operator can temporary peel off a part or the entirety of the sheet and then adhere the sheet again. Since attaching and detaching of the sheet can be repeated, the sheet can be posted by a small number of operators. Furthermore, easy reuse is also possible, such as the case where a sheet adhered on a place is adhered to another place.

By setting the thickness of the hook material to 600 pm or less, the bulkiness of the sheet fixed on the supporting surface can be suppressed. When the hook material is used as the first hook-and-loop fastener member, the sheet also becomes thin and light because the hook-and-loop fastener member becomes thin and light. Therefore, portability and handleability of the sheet can be further enhanced.

In a sheet according to another aspect, the 90° peeling adhesive strength relative to a second hook-and-loop fastener member that is capable of engaging with the first hook-and-loop fastener member may be from 0.5 N/25.4 mm to 8 N/25.4 mm. By setting the 90° peeling adhesive strength of the sheet in this manner, it is possible to maintain the engaging force while the sheet is put up and to achieve ease of detaching of the sheet, at the same time.

In a sheet according to another aspect, the film layer may include a supporting layer containing polyester. By this structure, the strength of the film layer and the sheet can be enhanced.

In a sheet according to another aspect, the first hook-and-loop fastener member may be fixed on the entirety of the back face of the film layer. By providing the first hook-and-loop fastener member in this manner, the operator can easily adhere the sheet to the supporting surface without precisely caring about the positional relationship relative to the second hook- and-loop fastener member provided on the supporting surface of the sheet. In a sheet according to another aspect, the engaging face of the loop material may have a region including no loop. By providing this region, the sheet can be easily detached by suppressing the peeling adhesive strength of the sheet. In addition, the sheet can be reliably adhered to the supporting surface while a phenomenon in which a part of the loop layer is peeled off during detachment of the sheet and transfers to the second hook-and-loop fastener member, such as the hook material, i.e. transfer, is avoided or suppressed.

In a sheet according to another aspect, the film layer is a printing film layer, and the sheet may be used as a graphic sheet. In this case, the graphic sheet can be easily attached or detached. Furthermore, easy reuse of the graphic sheet is also possible.

In a sheet according to another aspect, the first hook-and-loop fastener member may engage with a second hook-and-loop fastener member that is fixed on clothes or fabric. In this case, the graphic sheet can be easily attached or detached to the clothes or fabric. Furthermore, easy reuse of the graphic sheet is also possible.

A sheet according to another aspect may be used as a projector screen. In this case, the projector screen can be easily attached or detached. Furthermore, easy reuse of the projector screen is also possible.

A sheet according to another aspect may be used as a whiteboard sheet. In this case, the whiteboard sheet can be easily attached or detached. Furthermore, easy reuse of the whiteboard sheet is also possible.

A sheet according to another aspect may be used as a sheet for sticky notes. In this case, the sheet for sticky notes can be easily attached or detached. Furthermore, easy reuse of the sheet for sticky notes is also possible.

A sheet according to another aspect may be used as a decorative sheet for interior and exterior. In this case, the decorative sheet for interior and exterior can be easily attached or detached. Furthermore, easy reuse of the decorative sheet for interior and exterior is also possible.

In a sheet according to another aspect, the decorative sheet for interior and exterior may be used as a cover to hide at least one part of recesses and protrusions formed on an interior or exterior decoration. In this case, the recesses and protrusions can be easily covered or exposed. Furthermore, easy reuse of the cover is also possible.

A kit for a sheet according to one aspect of the present invention includes the sheet described above, and a second hook-and-loop fastener member that is capable of engaging with the first hook-and-loop fastener member and that is fixable to a supporting surface. In such an aspect, since a hook-and-loop fastener member is provided on the back face of the film layer, the sheet can be easily attached or detached. For example, even when wrinkles or slacking occurred on the sheet during the initial adhering of the sheet to the supporting surface, the operator can temporary peel off a part or the entirety of the sheet and then adhere the sheet again. Since attaching and detaching of the sheet can be repeated, the sheet can be posted by a small number of operators. Furthermore, easy reuse is also possible, such as the case where a sheet adhered on a place is adhered to another place.

A kit for a sheet according to another aspect may further include an adhesive layer having low tackiness between the second hook-and-loop fastener member and a supporting surface.

Since the adhesive layer having low tackiness is interposed between the second hook-and-loop fastener member and the supporting surface, damaging of the supporting surface can be avoided when the adhesive layer is peeled off from the supporting surface. For example, this is particularly effective in the case where the supporting surface is a fragile wallpaper or the like.

In a kit for a sheet according to another aspect, the adhesive layer having low tackiness may be a silicone-based adhesive layer. The silicone-based adhesive agent exhibits low adhesive strength while necessary holding characteristics can be achieved by high wettability although the adhesive strength is low. Therefore, by forming the adhesive layer by using the silicone-based adhesive agent, it is possible to peel off the adhesive layer without damaging the supporting surface.

Examples

The present invention is described more specifically below based on embodiments, but the present invention is not limited in any way to those embodiments.

Example 1

Production of graphic sheet and printing

A solution was prepared in which 35%, in terms of solid content, of an acrylic-based adhesive having a monomer composition containing 55% of n-butyl acrylate (BA), 25% of 2- ethylhexyl acrylate (2-EHA), 12.5 % of vinyl acetate (VAc), and 7.5% of acrylic acid (AA) was contained in ethyl acetate. In 100 g of this solution, 1 g of a bisamide crosslinking agent (5% solid content) was added and agitated, and then the solution was applied on a silicone-coated paper liner. Then, the applied solution was dried at 65°C for 3 minutes and then dried at 95°C for 2 minutes to obtain an adhesive layer having the thickness of 20 m. Then, a white PVC film that had a thickness of 90 m and that had undergone calender molding (JP-90P, available from Tatsuta Chemical Co., Ltd.) was laminated on the adhesive layer. The member obtained in this series of process was referred to as“Part A”.

On the other hand, a solution was prepared in which two types of polyurethane adhesives, TAKELAC A-969V and TAKENATE A-5 (available from Mitsui Chemicals, Inc.), were contained in a mass ratio of 3 : 1 in ethyl acetate. This solution was applied on a corona-treated biaxially oriented polypropylene (BOPP) film having a thickness of 12 m (available from

Shuangliang) so that the dry mass of the coating was 5.2 g/m ² to form an adhesive layer. Then, a knit (BMWV-001, available from Maruha Co., Ltd.), prepared as a loop material, was laminated on the adhesive layer. The member obtained in this series of process was referred to as“Part B”. For the knit, the basis weight was 21.5 g/m ² , the number of wales was 3.7 W/cm, and the number of courses was 8 C/cm. Note that the number of wales shows the density of the loops in a longitudinal direction of the knitted fabric, and the number of courses shows the density of the loops in the lateral direction of the knitted fabric.

Subsequently, Part A and Part B were combined by adhering the biaxially oriented polypropylene film to the adhesive layer of the PVC film, thereby a graphic sheet was obtained.

On a face of the film of this graphic sheet, a discretionary chosen graphic was printed by using an inkjet printer (JV5, available from Mimaki Engineering Co., Ltd.; the ink was a solvent ink available from the same, SS21).

To attach the printed graphic sheet, an aluminum plate having a dimension of 210 mm ^c 150 mm ^c 1 mm was prepared. On the peripheral edge of this aluminum plate, a hook material including an adhesive agent (NC-2141, available from 3M; 25 mm width) was adhered. Then, the printed graphic sheet was adhered to the aluminum plate by using a hand roller. The dimension (length and width) of the printed graphic sheet was the same as that of the aluminum plate.

90° Peeling adhesive strength

A sample piece was prepared by cutting the graphic sheet to 25 mm width. Furthermore, a hook material (NC-2141, available from 3M; 25 mm width) was adhered to an aluminum plate having a dimension of 30 mm ^c 150 mm ^c 1 mm by using a hand roller. Then, the sample piece was adhered to the aluminum plate by a method stipulated in JIS Z 0237 and left overnight. This series of process was performed for two sample pieces. Thereafter, the 90° peeling adhesive strength of each of the two sample pieces was measured by the method stipulated in JIS Z 0237, and the average value thereof (unit: N/25.4 mm) was determined.

Area of transfer of loop material to hook material

A sample piece was prepared by cutting the graphic sheet to 25 mm width. Furthermore, a hook material (NC-2141, available from 3M; 25 mm width) was adhered to an aluminum plate having a dimension of 30 mm ^c 150 mm ^c 1 mm by using a hand roller. For this hook material, the thickness of the base was 85 pm, the height of the hook was 285 pm, the thickness of the hook material was 370 pm, the maximum width of the umbrella portion (cap) of the hook was 420 pm.

A step in which the sample piece was adhered to the aluminum plate and then peeled off was repeated 10 times, and the area of transfer (unit: %) of the loop material (knit in Example 1) to the hook material was determined. For example, the area of transfer of 90% indicates that the loop materials were transferred in 90% region of the entire area of the hook material.

Example 2

Production of graphic sheet and printing

The difference from Example 1 was the structure of Part B. As the loop material, a nonwoven fabric (Laurel 2, available from Fibervision Suzhou) was prepared. In this nonwoven fabric, 33% of the entire area had been heat-sealed by hot pressing, and the loop-free region formed by the heat sealing were arranged in a plurality of lines extended in parallel. The basis weight of this nonwoven fabric was 35 g/m ² . The face that was on the opposite side of the heat- sealed face was laminated on the adhesive layer of Part A.

Example 3

Example 3 was different from Examples 1 and 2 in that the graphic sheet included the hook material, and the loop material was adhered to the aluminum plate. The difference from Example 1 regarding Part A was that no BOPP film was contained. To obtain Part B, a hook material having a width of 600 mm (NC-2141, available from 3M) was prepared, and the hook material was laminated on the adhesive layer formed by the same technique as in Example 1. The adhesive layer of Part A and the adhesive layer of Part B were then adhered to obtain a graphic sheet. A discretionary chosen graphic was printed on the face of the PVC film of this graphic sheet by the same technique as in Example 1.

To attach the printed graphic film, an aluminum plate having a dimension of 210 mm ^c 150 mm ^c 1 mm was prepared. On the peripheral edge of this aluminum plate, a loop material including an adhesive agent (NC-2841, available from 3M; 25 mm width) was adhered. For the loop material, the basis weight was 78 g/m ² , the number of wales was 14.6 W/cm, and the number of courses was 15.7 C/cm. The printed graphic sheet was adhered to the aluminum plate by using a hand roller. The dimension (length and width) of the printed graphic sheet was the same as that of the aluminum plate.

90° Peeling adhesive strength

The 90° peeling adhesive strength was determined by the same technique as in Example 1 except for adhering a loop material (NC-2841, available from 3M; 25 mm width) to an aluminum plate having a dimension of 30 mm ^c 150 mm ^c 1 mm by using a hand roller.

Area of transfer of loop material to hook material

The area of transfer of the loop material to the hook material was determined by the same technique as in Example 1 except for adhering a loop material (NC-2841, available from 3M; 25 mm width) to an aluminum plate having a dimension of 30 mm ^c 150 mm ^c 1 mm by using a hand roller.

Comparative Example 1

While a polyethylene/polypropylene mixture resin having the thickness of 70 m was extruded by using a T die, the polyethylene/polypropylene mixture resin and a nonwoven fabric (PRX-40, available from Hattori Takeshi KK) were subjected to in-line adhesion. This provides a sheet having the thickness of 200 m as Part B. Heat sealing was not performed on the nonwoven fabric, and thus the area to which the heat sealing was applied was 0%. The polyethylene/polypropylene mixture resin of Part B and the adhesive agent of Part A produced in the same manner as in Example 1 were then adhered to obtain a graphic sheet.

Comparative Example 2

While a polyethylene/polypropylene mixture resin having a thickness of 70 m was extruded by using a T die, the polyethylene/polypropylene mixture resin and a nonwoven fabric (ELEVES (trade name) T0403WDO, available from Unitika Ltd.) were subjected to in-line adhesion. This provide a sheet having the thickness of 140 m as Part B. In the used nonwoven fabric, 85% of the entire area was heat-sealed, and the loop parts were scattered in a lattice-like manner. The polyethylene/polypropylene mixture resin of Part B and the adhesive agent of Part A produced in the same manner as in Example 1 were then adhered to obtain a graphic sheet.

Test result

The results of the 90° peeling adhesive strength (N/25.4 mm) and the area of transfer of the loop material to the hook material (%) of each of the three examples and the two comparative examples described above are shown in Table 1.

Table 1

The foregoing has been a detailed description of the present invention with respect to the embodiments and examples thereof. However, the present invention is not limited to the embodiment described above. Various modifications can be made to the present invention without deviating from the gist thereof. Regarding the present disclosure, the present invention may be provided as described below.

Item 1

A graphic sheet including:

a printing film layer having a printing face and a back face; and

a fastener layer having a first hook-and-loop fastener member that is fixed on at least one part of the back face of the printing film layer;

the first hook-and-loop fastener member having at least one of a loop material containing a nonwoven fabric or knit or a hook material.

Item 2

The graphic sheet described in Item 1, where

a 90° peeling adhesive strength relative to a second hook-and-loop fastener member that is capable of engaging with the first hook-and-loop fastener member is from 0.5 N/25.4 mm to 8 N/25.4 mm.

Item 3

The graphic sheet described in Item 1 or 2, where

the first hook-and-loop fastener member is fixed on an entirety of the back face of the printing film layer.

Item 4

The graphic sheet described in any one of Items 1 to 3, where

an engaging face of the loop material has a region having no loop.

Item 5

A graphic kit including:

the graphic sheet described in any one of claims 1 to 4; and

a second hook-and-loop fastener member that is capable of engaging with the first hook- and-loop fastener member.

The graphic sheet according to one aspect of the present invention includes: a printing film layer having a printing face and a back face; and a fastener layer including a first hook-and- loop fastener member that is fixed on at least one part of the back face of the printing film layer; the first hook-and-loop fastener member including at least one of a loop material containing a nonwoven fabric or knit or a hook material.

The graphic kit according to one aspect of the present invention includes the graphic sheet described above, and a second hook-and-loop fastener member that is capable of engaging with the first hook-and-loop fastener member.

In such an aspect, due to the employed printing film layer, a certain quality or more can be ensured for the printing of the graphic. Furthermore, since the hook-and-loop fastener member is provided on the back face of the printing film layer through the adhesive layer, the graphic sheet can be easily attached or detached. For example, even when wrinkles or slacking occurred on the graphic sheet during the initial adhering of the graphic sheet to the supporting surface, the operator can temporary peel off a part or the entirety of the graphic sheet and then adhere the graphic sheet again. Since attaching and detaching of the graphic sheet can be repeated, the graphic sheet can be posted by a small number of operators. Furthermore, easy reuse is also possible, such as the case where a graphic sheet adhered on a place is adhered to another place.

In a graphic sheet according to another aspect, the 90° peeling adhesive strength relative to a second hook-and-loop fastener member that is capable of engaging with the first hook-and- loop fastener member may be from 0.5 N/25.4 mm to 8 N/25.4 mm. By setting the 90° peeling adhesive strength of the graphic sheet in this manner, it is possible to maintain the engaging force while the graphic sheet is put up and to achieve ease of detaching of the graphic sheet, at the same time.

In a graphic sheet according to another aspect, the first hook-and-loop fastener member may be fixed on an entirety of the back face of the printing film layer. By providing the first hook-and-loop fastener member in this manner, the operator can easily adhere the graphic sheet to the supporting surface without precisely caring about the positional relationship relative to the second hook-and-loop fastener member provided on the supporting surface of the graphic sheet.

In a graphic sheet according to another aspect, the engaging face of the loop material may have a region including no loop. By providing this region, the graphic sheet cans be easily detached by suppressing the peeling adhesive strength of the graphic sheet. In addition, the graphic sheet can be reliably adhered to the supporting surface while a phenomenon in which a part of the loop layer is peeled off during detachment of the graphic sheet and transfers to the second hook-and-loop fastener member, such as the hook material, i.e. transfer, is avoided or suppressed.

Reference Signs List

I, 1A... Sheet

2... Film layer

2a... Front face

2b... Back face

12, 12A... Fastener layer

13... Adhesive layer

111... Film

112... Supporting layer

113... Adhesive layer

10, 10A... Graphic sheet

I I ... Printing film layer

l la... Printing face

l lb... Back face

21... Loop material

22... Hook material 31... Projector screen

32... Whiteboard sheet

33... Sheet for sticky notes

34... Decorative sheet for interior and exterior 40... Adhesive sheet

40a... Base material layer

40b... Adhesive layer

40c... Adhesive layer

80... Graphic pattern

90... Supporting surface

91... Recess portion

92... Protruding portion

100... Kit for sheet