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Title:
METHOD OF MANUFACTURING A WRAPAROUND PACKAGING LABEL
Document Type and Number:
WIPO Patent Application WO/2016/157205
Kind Code:
A1
Abstract:
A method for manufacturing a wraparound label (Banderole) and a wraparound label is provided. A web of fibrous substrate such as paper having high wet strength is provided. A first surface of the web is surface printed. The first printed surface of the web is coated with an E-Beam curable coating and cured. A layer of hot melt adhesive is applied on a second surface of the web. Further, required number of wraparound labels are cut from the web and either wrapped around the pre formed containers or placed inside mold cavities for thermoforming, injection molding or blow molding to have the label sealed on an outer surface of a container.

Inventors:
CHATURVEDI ASHOK (IN)
Application Number:
PCT/IN2016/000070
Publication Date:
October 06, 2016
Filing Date:
March 23, 2016
Export Citation:
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Assignee:
CHATURVEDI ASHOK (IN)
International Classes:
B41M7/00; C09J7/29; G09F3/10
Domestic Patent References:
WO2001094451A22001-12-13
Foreign References:
EP0208261A21987-01-14
EP1219463A22002-07-03
EP0145383A21985-06-19
Other References:
None
Attorney, Agent or Firm:
SINGH, Raghavendra Pratap (NOIDA, U.P.- 1, IN)
Download PDF:
Claims:
A method (200) of manufacturing a packaging label for packages stored in high moisture environment, the method comprising:

providing a web of substrate (302) having a high wet strength, the substrate having a first surface and a second surface;

surface printing on the first surface of the substrate (302);

coating and curing the first surface of the substrate by an electron beam curable coating; and

applying a layer of hot melt adhesive on the second surface of the substrate, wherein the electron beam curable coating and the hot melt adhesive are selected such that first surface and the second surface are sealable to each other when overlapped.

The method (200) as claimed in claim 1 , wherein the substrate (302) is a roll of substrate.

The method (200) as claimed in claim 1 , wherein the substrate (302) is in the form of individual cut sheets.

The method (200) as claimed in claim 1 , wherein the substrate (302) is a fibrous material such as coated or uncoated paper or laminate structure essentially having paper on outer side.

The method (200) as claimed in claim 1 , wherein the substrate (302) selected is within a range of 70 to 90 Grams per Square Meter (GSM).

The method (200) as claimed in claim 1, wherein the surface printing on the first surface of the substrate is done using at least one of as rotogravure printing, or Flexographic printing or offset printing or screen printing or laser printing or digital printing.

The method (200) as claimed in claim 1 , wherein optionally at least one of holograms, latent images/texts, Fresnel lenses or any other holographic pattern are configured on the printed first surface of the substrate.

8. The method (200) as claimed in claim 6, wherein the holograms, latent images/texts, Fresnel lenses or any other holographic pattern are configured by using at least one of cold transfer and hot foil stamping.

9. The method (200) as claimed in claim 1 , wherein coating weight of the electron beam curable coating is within a range of 3 to 8 Grams per Square Meter (GSM).

10. The method (200) as claimed in claim 1 , wherein coating weight of the hot melt adhesive layer applied on the second surface of the substrate is within a range of 7 to 20 Grams per Square Meter (GSM).

11. The method (200) as claimed in claim 7, wherein the hot melt adhesive (308) is made up of at least one of Ethylene-vinyl acetate, Synthetic rubber, polyurethane, acrylic, polyamide, and polyester or combination thereof.

Description:
METHOD OF MANUFACTURING A WRAPAROUND PACKAGING LABEL FIELD OF THE INVENTION

The present disclosure generally relates to wraparound package labeling, and more particularly, relates to a method of manufacturing wraparound package label for package labeling and a wraparound package label thereof.

BACKGROUND OF THE INVENTION

Package labels are an essential part of packaging all sorts of products. In cases of products that are stored in high moisture environment, labels need to be strong and water resistant to sustain against the high moisture of the environment. Generally, labels of such products are made as wrap around labels, also known as banderole.

Banderoles are very common in the present times for packaging consumable products such as dairy products, juices, aerated drinks etc. Generally, these packages and / or containers with wraparound are used for packaging products that are sold in portion packs, such as yoghurt, jelly, butter, or other edible products. Typically, the banderoles are manufactured by using a paper or plastic film or laminate, which are printed and provided on the outside of the containers by a number of processes such as wraparound application on injection molding or thermoforming or blow molding process or by wrapping around the package. The substrate selected for such labels generally has a high wet strength in order to sustain against moisture while storing these products in cold environments or deep freezers. For example, dairy products may be stored in refrigerators having high moisture environment or dipped in cold water and the material of the package label must be able to retain its strength, shape, printing, gloss etc. Thick paper based substrates are most commonly used as banderole labels which still absorb certain level of moisture over the time and tend to lose their strength and are prone to damage easily during storage, handling or use. Therefore, there is a need for an improved wraparound label and a method of making the improved wraparound label having still greater barrier properties for moisture.

BRIEF DESCRIPTION OF THE DRAWINGS

The advantages and features of the present disclosure shall be better understood with reference to the following description taken in conjunction with the accompanying drawing, wherein like elements are identified with like symbols and in which :

FIG. 1 illustrates an exemplary container with a wraparound label thereof, according to an embodiment of the present invention; FIG. 2 illustrates an exemplary flowchart of a method of manufacturing the wraparound label according to an embodiment of the present disclosure; and

FIG. 3 illustrates a cross-sectional view of the structure of wraparound label, according to an embodiment of the present disclosure. Like reference numerals refer to like parts throughout the description of several views of the drawings.

DETAILED DESCRIPTION OF THE INVENTION

For a thorough understanding of the present disclosure, reference is to be made to the following detailed description in connection with the above-mentioned drawings. Although the present disclosure is described in connection with exemplary embodiments, the present disclosure is not intended to be limited to the specific forms set forth herein. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but these are intended to cover the application or implementation without departing from the spirit or scope of the present disclosure. Further, it will nevertheless be understood that no limitation in the scope of the disclosure is thereby intended, such alterations and further modifications in the figures and such further applications of the principles of the disclosure as illustrated therein being contemplated as would normally occur to one skilled in the art to which the disclosure relates. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the disclosure. Furthermore, the appearances of such phrase at various places herein are not necessarily all referring to the same embodiment. The terms "a" and "an" herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. Moreover, the term "inner surface/layer" used herein above and/or below may be interchangeably used as an "inner surface" or an "inner layer" through out the disclosure. Further, the term "outer surface/layer" used herein above and/or below may be interchangeably used as an "outer surface" or an "outer layer" through. The present invention relates to a wraparound label and a method of manufacturing the wraparound label thereof. FIG. 1 illustrates a container (100) with a wraparound label (102), according to an embodiment of the present invention. FIG. 2 illustrates an exemplary flowchart for a method (200) for manufacturing the wraparound label stock for the wraparound label (102), according to an embodiment of the present invention. FIG. 3 illustrates a cross-sectional view of the structure of wraparound label (102). The description of the present invention is described hereinafter with collective reference to FIGS. 1 to 3.

The wraparound label (102) of the present invention may be used to label, and / or decorate the containers (100) which may be used to store and transport consumable products such as dairy products, plastic bottles used for storing water, aerated drinks, juices etc. Such wraparound labels (102) are very important means of providing aesthetic and visually attractive labeling, decoration and security features to the containers (100). The containers (100) may also include trays which are thermoformed or injection molded. In an exemplary embodiment, the packaging label (102) of the present invention, may be a banderole, which could be wrapped around the containers (100) which can be applied as in-mold label on injection molding or thermoforming or blow molding process or by wrapping around the package.

At step 202, a web of substrate (302) is provided. For example, the substrate (302) is a fibrous material such as coated or uncoated paper. In various other exemplary embodiments, the substrate (302) may be made of laminate structures, including but not limited to, multi-layer paper - polymer laminate, paper - metal foil laminate or any other laminate structure essentially having paper on outer side. It may be contemplated that the term substrate (302) may include, but not limited to, a roll of substrate or an individual substrate sheet or individual cut sheets.

According to an embodiment of the present invention, the label substrate (302) is a high wet strength paper of about 70 - 90 Grams per Square Meter (GSM) in suitable thickness.

At step 204, a first surface (304) of the substrate (302) is surface printed. According to various embodiments of the present invention, the first surface (304) of the substrate (302) may be printed using one or a combination of the processes such as rotogravure printing, or Flexographic printing or offset printing or screen printing or laser printing or digital printing. It may be contemplated that the surface printing may be done using any other known methods of printing.

Additionally holograms, latent images/texts, Fresnel lenses or any other holographic pattern are configured with or over the printed surface by cold transfer or hot foil stamping or direct embossing. Further, at step 206, the printed first surface (304) of the substrate (302) is coated with e-beam curable coating (306) and subsequently cured using electron beam (E-Beam) radiation. In an embodiment the coating weight of the E-beam curable coating (306) is within a range of about 3~8 GSM offering desired thickness. It may be contemplated that the weight and thus the thickness, of the E-beam curable coating (306) may be varied based upon a number of factors, such as moisture barrier properties required, the level of gloss required on the label surface and / or to increase the stiffness and strength of the label (102). It may be appreciated by a person having ordinary skill in the art that the E-beam curable coating (306) provides stiffness and excellent gloss to the printed surface of the wraparound label (102). Further, the E-beam cured coating (306) increases the water and moisture resistance of the wraparound label and thereby making it resistant to loss in strength due to wetting, retaining the quality of the wraparound label substrate (302). In addition, the E-beam cured coating (306) imparts more stiffness and strength to the label substrate (302) making it possible to use a lighter weight paper thereby reducing the cost of the wraparound label (102) and thus the cost of the container (100) having the wraparound label (102). Furthermore, the E-beam cured coating (306) makes the wraparound label (102) alkali resistant, thereby making it resistant to fading, discoloring, and other damages caused due to exposure or contact of the wraparound label (102) to high pH substances such as soaps, adhesives etc. Once the surface printing on the first surface (304) of the substrate

(302) is coated with E-beam curable coating (306) and cured, a hot melt adhesive layer (308) is applied to a second surface (310) of the substrate (302) opposite to the first surface (304), at step 208. According to an embodiment of the present invention, the coating weight of the hot melt adhesive (308) applied on the second surface (310) of the substrate (302) is within a range of about 7-20 GSM. In various exemplary embodiments of the present disclosure, the hot melt adhesive (308) may be made up of EVA, Synthetic rubber, polyurethane, acrylic, polyamide, polyester etc.

According to an embodiment of the present invention, the formulation of E-beam curable coating (306) and the hot melt adhesive (308) applied to the first surface (304) and the second surface (310) of the substrate (302) respectively are selected such that the first surface (304) is sealable with the second surface (310) when the edges (104) of the label (102) are overlapped and concurrently the hot melt adhesive (308) must be sealable with an outer surface (106) of the container (100). Furthermore, at step 210, the web (302) obtained at the step 208 having the printed and e-beam cured (306) first surface (304) and hot melt adhesive coating (308) on the second surface (310) is punched or cut into desired length, shape and size of the wraparound label (102). The label (102) is then wrapped around manually or automatically over the preformed containers such that the edges of the label (102) overlap and seal together, in another embodiment the labels are placed manually or automatically inside cavities of the mold before thermoforming, injection molding or blow molding is performed to obtain container (100) with label on the outer surface (106). The wraparound label (102) with E-beam cured coating (306) is advantageous over the existing ones as the E-beam cured coating (306) provides strength and stiffness to the labej (102) and provides excellent gloss and rub resistance to the first surface (304) of the label (102). Additionally, the E-beam cured coating (306) makes the label (102) water / moisture resistant and alkali resistant, thereby ensuring that the label (102) remains in good condition throughout the shelf life of the container when stored in cold, moist or wet condition. Furthermore, by using the E-beam cured coating (306) on the label (102), the weight and thickness of the substrate (302) web for label ( 02) may be reduced, as the stiffness and the strength is increased by the E-beam cured coating (306). Therefore, the cost of substrate (302) for the wraparound label (102) is reduced significantly, thereby making it a more cost efficient method of making the wraparound labels (102) and thus the package and / or the container (100) having the wraparound label (102) thereof, with added advantages.

The foregoing descriptions of specific embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present disclosure and its practical application, to thereby enable others skilled in the art to best utilize the present disclosure and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present disclosure.