CA2623095C - Multilayer substrate for floor soundproofing - Google Patents

Abstract

The invention relates to a multilayer substrate which is intended to be installed under a floor covering in order to soundproof said floor. The inventive substrate includes an upper layer consisting of a film of a polymer, such as polyester or polyethylene.The substrate also includes a central layer consisting of a thermofusible film having a polymer bitumen coating applied thereto. The substrate further includes a lower layer consisting of aggregates originating from recycled tyres, which are applied to an added polymer bitumen support or which are placed directly on the central layer.

Description

MULTILAYER SUBSTRATE FOR SAVING A FLOOR
FIELD OF THE INVENTION
The present invention relates to a multilayer substrate for soundproofing a floor. More specifically, the subject of the invention is a substrate intended for to be used in the field of residential or commercial construction particularly in order to obtain a high soundproofing efficiency at impact noises due to "walking".
SUMMARY OF THE INVENTION
The multilayer substrate according to the invention is intended to be installed mainly under a floor covering, including a floor of wood, with a view to soundproofing said floor. By "wood floor" we mean laminate flooring, engineered wood flooring or a solid wood floor.
an upper layer consisting of a film of polymer such as a film polyester which preferably has a thickness of between 0.8 and 1.2 mm or a high density polyethylene film of a thickness between 75 and 150 microns (3 to 6 mils), covered optionally a layer of bitumen or any other type adhesive;
a central layer consisting of a polymer and / or oxidized bitumen optionally provided with a reinforcement on the inside made of fiber glass and / or polyester, and optionally covered on each side bitumen with a hot melt film such as a polyethylene film or polypropylene with a thickness of about 10 microns, or a film of silicone, this central layer preferably having a thickness between 2.2 mm and 4.8 mm; and

2 - a lower layer consisting of aggregates of a size between 2 and 30 mesh (12 to 0.85 mm) from recycled tires, the aggregates being applied to any support supplemented with polymer bitumen or can be placed directly on the layer central, this lower layer preferably having a thickness between 3 and 20 mm.
The invention and its advantages will become more apparent from the description which follows, made with reference to the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
The only appended drawing figure, which is numbered 1, is a view in cutting a section of a floor provided with a multilayer substrate according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
As illustrated in the figure of the accompanying drawing, the substrate multilayer 1 according to the invention is intended to be installed between a coating of floor

3 which, in the Figure, consists of pieces of wood fitted together in the others, and the floor itself 5 which in the Figure is constituted of a concrete surface. The substrate 1 is essentially intended to reduce at the maximum the impact noise due to the marching.
As previously described, the substrate 1 is composed of three layers which each have a very particular function.
The upper layer 7 consists of a polymer film. This film can be a polyester film which is preferably non-woven and forms a frame which serves as a mechanical support for the finishing coating of the floor that is of wood as illustrated, or any other. This polyester film a preferably a thickness of between 0.8 and 1.2 mm. If it's a movie of high density polyethylene, it will preferably have a thickness between 75 and 150 microns. You can also use a film from a another polymer whose thickness may vary depending on the nature of the said polymer.
The central layer 9 consists of a polymer and / or oxidized bitumen Optionally provided with fiberglass reinforcement on the inside and or of polyester and covered or not on each side of the bitumen with a film thermofusible material such as a polyethylene or polypropylene film with a thickness of about 10 microns, or a silicone film. Polymeric bitumen and / or oxidized in question is preferably applied in a varying amount between 2.5 and 6 kg. This central layer acts as a screen of inertia to acoustic zones and has a thickness preferably of between 2.2 mm and 4.8 mm.
Finally, the lower layer 11 consists of aggregates from tires recycled, which preferably have a diameter of between 2 to 30 mesh (12 to 0.85 mm). These aggregates of recycled tires are applied on a any carrier added with polymer bitumen. Alternatively, aggregates can be laid directly on the core layer. This last layer which preferably has a thickness of between 3 and 20 mm, serves to reduce the transfer of vibrations caused by the impact of by minimizing ground contact points.
The substrate is preferably in the form of panels which may have dimensions of the order of 89 cm X 135 cm (35 "X 53"). Of course, this panel could have other dimensions as well as other shapes in according to needs.
Because of its structure, the substrate according to the invention is adapted mainly to the wood coverings as well as any type of structure (concrete, wood, metal). This substrate is used primarily for the soundproofing of floors.

4 EXAMPLE
Tests were carried out on a multilayer substrate according to the invention whose composition and dimensions were as follows:
Upper layer: 1.0 mm polyester film coated on the underside of 0.4mm thick self-adhesive bitumen.
Central layer: polymer bitumen with fiberglass reinforcement on one side of a hot melt film. This layer had a nominal thickness of 3.5 mm.
Lower layer: Recycled tire aggregates with a diameter of approximately 1.3 mm (20 mesh) deposited on a polyester film of 50 microns covered with polymer bitumen. This layer had a nominal thickness of 3 mm.
The three layers were assembled to give a panel of 89 cm x 135 cm (35 "x 53").
The following assemblies and tests made with this panel:
System # 1: Engineered Wood Flooring "click connect"
Panel according to the invention as described above Concrete slab: 20 cm (8 ") The acoustic results obtained among the impact noises were as follows:
FIIC = 63 System # 2: 8 mm laminated laminate wood flooring Panel according to the invention as described above Concrete slab: 20 cm (8 ") PCTiCA 6 00 1 7 3 .07 The acoustic results obtained among the impact noises were the following:
FIIC = 64

The tests also carried out on the described sample of a substrate according to the invention have thus shown that the acoustic results are approximately FIIC 63 and FIIC 64 for impact noise, which is a very high level of soundproofing.
NIEN.DEC SHEET

Claims (4)

1. A multilayer substrate intended to be installed under a coating of floor to soundproof said floor, characterized in that comprises:
an upper layer consisting of a polymer film;
a central layer consisting of a polymer and / or oxidized bitumen optionally with fiberglass reinforcement on the inside and / or polyester, said core layer being optionally covered on each side of the bitumen with a hot melt film or silicone; and - a lower layer consisting of aggregates from tires recycled, which are applied on a support with bitumen polymer or are laid directly on the core layer. The multilayer substrate according to claim 1, characterized in that, in the lower layer, the aggregates have a diameter between 0.85 and 12 mm (30 to 2 mesh). 3. The multilayer substrate according to claim 1 or 2, characterized in that than:
the upper layer consists of a polyester film having a thickness between 0.8 and 1.2 mm or a polyethylene film high density having a thickness of between 75 and 150 microns (3 to 6 mils);
the central layer has a thickness of between 2.2 and 4.8 mm;
and the lower layer has a thickness of between 3 and 20 mm. 4. The multilayer substrate according to any one of claims 1 to 3, characterized in that it is in the form of a panel of a dimension of the order of 89 cm to 135 cm.