DESCRIPTION

The present patent concerns the field of soundproofing panels and in particular it concerns a new soundproofing panel made of composite fibres.

Soundproofing panels are known which are used to reduce the transmission of sound through the walls of adjacent rooms, or through the floor and/or the ceiling between rooms located on two superimposed floors, or between the outside and the inside of a building.

At present soundproofing panels are mainly made with fibrous mineral materials such as, for example, rock wool, glass wool, in one or more layers having different density or inserted between one or two external layers of other materials such as, for example, wood or plasterboard. Synthetic materials are obtained through derivation from chemical substances, the use of which is increasingly diminishing as it is preferable to use natural materials, in particular recycled raw materials. Recycled raw materials are constituted by raw material processing waste or by materials deriving from the recovery or recycling of waste.

The subject of the present patent is a new panel made of composite fibres, constituted by recycled raw materials and suited to be used as a soundproofing panel.

It is an object of the present patent to provide a soundproofing panel that can be produced with a limited use of raw materials, either natural or synthetic.

It is another object of the present patent to provide a new panel with optimal sound insulation characteristics.

These and other direct and complementary objects are achieved by the new panel made of composite fibres and suited to be used as a soundproofing panel, comprising textile waste, recycled wool, at least one polymer acting as an aggregating agent.

Textile waste can derive from natural fibre fabric of any type such as, for example, silk, cotton, linen, hemp. Recycled wool is obtained from fabrics, clothing items, blankets and other fabrics made of ground wool reduced in single threads.

The aggregating polymer can be any polymer suitable for this purpose, preferably polypropylene.

In particular, the recycled wool content makes up at least 12% of the entire mass of the new soundproofing panel.

Textile waste and recycled wool are ground, carded, hygienized and mixed together, with the addition of the aggregating polymer, in such a way as to obtain a homogeneous mass that is successively hot rolled between several pairs of rollers, thus obtaining a layer with suitable density and thickness.

The new panel made of composite fibres can be used as a resilient soundproofing panel located under the floor, between the walking surface and the underlying screed or as a resilient element suitable for footfall reduction situated between the screed and the underlying structural bearing floor.

The new panel made of composite fibres can be used individually or it can preferably be coupled with other materials or panels according to the intended final use.

The characteristics of the new composite panel will be highlighted in greater detail in the following description with reference to the drawings that are attached hereto by way of non-limiting examples.

Figure 1 shows the new panel made of composite fibres and constituted by a layer (M) of textile waste, recycled wool, aggregating polymer and suited to be used as a soundproofing element both under floors, between the bearing floor and the walking surface, and in walls, ceilings and floors in general.

Figure 2 shows a panel comprising a layer (M) of textile waste, recycled wool, aggregating polymer, which is coupled on each side with a wood fibre panel (L). The composite panel shown in this example is suited to be used as a soundproofing element in air spaces.

Figure 3 shows a panel comprising a layer (M) of textile waste, recycled wool, aggregating polymer, which on one side is coupled with a plasterboard panel (C). The composite panel illustrated in this example is suited to be used as a soundproofing element for pre-existing walls and ceilings.

Figure 4 shows a panel comprising an intermediate wood fibre panel (L) coupled on one side with a layer (M) of textile waste, recycled wool, aggregating polymer, and on the other side with a plasterboard panel (C).

The composite panel illustrated in this example is suited to be used as a soundproofing element for ceilings.

Figure 5 shows a panel comprising a layer (M) of textile waste, recycled wool, aggregating polymer, which on at least one side is coupled with a polyethylene sheet (S) with selvedge (Sc) and Velcro (V) applied to said selvedge (Sc).

The composite panel illustrated in this example is suited to be used as a resilient soundproofing element suitable for footfall reduction, to be positioned on the structural bearing floor before laying the upper screed.

Figure 6 shows a panel comprising a layer (M) of textile waste, recycled wool, aggregating polymer, coupled with a plasterboard panel (C) onto which, in turn, a polyethylene sheet (S) with selvedge (Sc) is applied.

The composite panel illustrated in this example is suited to be used as a resilient soundproofing element suitable for footfall reduction, to be positioned on the structural bearing floor before laying the upper screed.

Figure 7 shows a panel comprising a layer (M) of textile waste, recycled wool, aggregating polymer, which on at least one side is coupled with a rubber sheet or layer (G).

The composite panel illustrated in this example is suited to be used as a soundproofing element in special applications.

Therefore, with reference to the above description and the attached drawings, the following claims are expressed.