FR2782528A1 - Insulation material has two textile fabric layers with intermediate locking filaments between them and injected expanding foam mass between fabrics to give strong and lightweight insulation board - Google Patents

Abstract

The multilayer insulation material has at least two layers of a textile fabric (2A,2B) with intersecting warps and wefts. The separate fabric layers (2A,2B) are bonded together by intermediate multifilaments and/or monofilaments (3) and/or linking fibers of both fabrics (2A,2B). The intermediate locking filaments (3) are woven alternately into each of the fabric layers (2A,2B). Or the filaments (3) are bonded to each fabric layer (2A,2B) by an adhesive and/or a linking yarn along the outer surface of each fabric (2A,2B). Optic fibers can be between the two fabric layers (2A,2B), with at least part of the optic fibers used as the locking links between the fabric layers (2A,2B). The two fabric layers (2A,2B) are held apart by an injected and expanding foam mass. The inner and/or outer surfaces of the fabric layers (2A,2B) are coated with a pliable setting layer, to hold the structure together as a board.

Description

1 () Multilayer insulation element and its manufacturing process La

  the present invention relates to a multilayer element

  sound and / or thermal insulation and the method2) of manufacturing such an element.

  Composite elements in the form of flexible or rigid panels are today widely used in construction, for thermal or sound insulation purposes. Such elements, such as "plasterboard" (registered trademark) formed by a layer of plaster interposed between two sheets of paper, are heavy and have an imperfect mechanical strength due to their tendency to crack. Furthermore, such materials require a long exposure time and lead, during their manufacture or after use,

  the formation of waste whose recycling is difficult.

  The object of the present invention is therefore to propose a multilayer element for sound and / or thermal insulation, in particular for construction, the design of which allows the production of an element of reduced weight, of great mechanical resistance, the destruction of which is easy

  2 and which does not generate waste during manufacture.

  Another object of the present invention is to provide a multilayer element for sound and / or thermal insulation whose installation is facilitated and whose composition of materials excludes any risk to the health of users. To this end, the subject of the invention is a multilayer element for sound and / or thermal insulation, characterized in that it comprises at least two textile sheets extending facing each other and each formed by an interlacing of warp threads. or warp and weft yarns, said sheets being linked together by multifilaments and / or monofilaments and / or yarns of binding fibers coming into engagement with each of the

textile sheets.

  The subject of the invention is also a method of manufacturing 2) a multilayer element for sound and / or thermal insulation, characterized in that woven simultaneously and

  in parallel at least two textile sheets and in that said sheets are connected at the same time by means of monofilaments and / or multi-filaments and / or yarns of binding fibers.

  The invention will be clearly understood on reading the

  following description of exemplary embodiments, with reference to the appended drawings in which: 3 <)

  FIG. 1 represents a perspective view of a multilayer element of sound and / or thermal insulation affecting the shape of a panel according to the invention; FIG. 2 schematically represents warp, weft and binding threads for the production of a multilayer element according to the invention; FIG. 3 schematically represents some examples of positioning of a mono-filament for binding textile sheets; FIG. 4 represents a weaving installation for implementing the method for manufacturing a multilayer element according to the invention and 1 () FIG. 5 represents a variant of an installation suitable for implementing the object method of the invention. The multilayer element represented by the general reference 1 in the figures is more particularly intended for construction because of its insulation characteristics

  phonic and / or thermal. Due to its many applications, this element can have a large number of shapes and can be in particular in the form of 2 () rolls, panels, etc. Figure 1 illustrates an embodiment of the element in the form of a panel.

  This element comprises at least two textile sheets 2A, 2B, arranged facing each other and extending in parallel as shown in FIG. 1. These textile sheets can be made up, according to the textile processing technique used, either only of a interweaving of warp threads, that is to say an interlacing of warp threads 4, 5 (FIG. 2) called respectively even and odd and of weft threads 6. The threads 4, 5, 6 used for the production of these textile sheets 2A , 2B are fibers of various origins, such as synthetic, natural, inorganic fibers, etc. The distance between the two sheets 2A, 2B can be determined by adjusting the processing machines

  which allow a spacing between the two parallel textile sheets.

  In addition to these textile sheets 2A, 2B, the multilayer element also comprises multi-filaments and / or monofilaments and / or spunbond yarns for bonding the textile sheets together. These multifilaments and / or monofilaments and / or spun fibers are organized so as to come into engagement with each of the textile sheets 2A, 2B. In the example shown in FIG. 1, the element serving for the connection between said1) textile sheets 2A, 2B is constituted by a monofilament 3. It should be noted that by multifilaments we mean yarns made up of several very long filaments with or without twist. Furthermore, the term “monofilaments” means yarns made of a single filament with or without twist and by yarns of fibers, a textile element of great length made up of staple fibers maintained

together by twisting.

  In a preferred embodiment of the invention, the 2) textile sheets 2A, 2B are interconnected by monofilaments 3 alternately engaged by weaving with each of the textile sheets. The arrangement of the warp and weft threads is in accordance with that shown in FIG. 2 in which the reference 425 corresponds to an even warp thread, the reference 5 to an odd warp thread, the reference 6 to the weft thread and the reference 3 to the monofilament or tying yarn. The engagement of the binding threads with each of the textile sheets can be diverse and varied. The examples in Figure 330 illustrate this perfectly. In this figure, there is shown each time the binding son 3 in line

  solid, while the weft threads of each of the textile sheets are represented by dots.

  In this first exemplary embodiment, the textile sheets 2A, 2B are interconnected by mono-

  filaments 3 alternately engaging by weaving with each of the textile sheets. To allow such an implementation, an installation of the type shown in FIG. 4 can be used. In this case, to obtain such a multilayer element, at least the two textile sheets are woven simultaneously and in parallel. and said sheets are connected at the same time by means of monofilaments and / or of multifilaments and / or of binding fibers. Thus, in such an installation, there is a first coil or beam on which the monofilament 3 is wound. There are two other coils or beams of multi-filaments intended to constitute the warp threads 4, 5. produces from these warp yarns supplemented by weft yarns 6 plies of interlaced multi-filaments which will constitute, for one, the upper ply 2B and for the other the lower ply 2A. This intertwining of warp threads 4, 5 and weft 6 is then subjected to the action

  of a comb 7 before being subjected to the action of the binding threads 3 which are woven alternately in one and the other of the sheets. There is thus obtained a process for easily manufacturing such a multilayer element. The monofilament used is generally a polyester fiber.

  Obviously, other methods of connecting the textile sheets to each other by the binding threads can be envisaged. Thus, the textile sheets 2A, 2B can be linked together by monofilaments passing through said sheets and kept in engagement with said sheets by gluing and / or by means of a tying thread extending along the external face. said textile sheets. This embodiment is not shown. Furthermore, in certain embodiments (not shown) of the invention, said element comprises between said sheets optical fibers. In a particular embodiment, at least a portion of the optical fibers can consist of the monofilaments used for the connection between two textile sheets to give a

  luminous aspect particular to the whole.

  6 To complete the production of this element, at least one of the textile sheets 2A, 2B can be coated internally and / or externally with a layer of a curable binder such as a polyurethane or acrylic resin, 5 to ensure the holding of the whole of said element. This binder is generally applied by means of a gun and then scraped by means of an appropriate scraper. In addition, the textile sheets can still be printed to give an aesthetic appearance to the whole product. () Finally, as mentioned above, the sheets

  textiles 2A, 2B are generally kept apart from each other either at the time of their manufacture, or by a filling material, such as an expandable injectable foam.

  Obviously, other filling materials can be used. Thus, another embodiment of the multilayer element, object of the invention, is 2 (shown in Figure 5. In this case, the textile sheets arranged in the wound state on spools have been manufactured in a step The installation shown here therefore allows on the one hand the introduction of a filling material 9 between said textile sheets 2A, 2B, on the other hand the laying of monofilaments 3. In this exemplary embodiment, the monofilaments are laid at

  by means of a row of needles which perforate the upper textile layer, the layer of filling material and the lower textile layer to join together 30) said layers. The points represented at 8 correspond to the perforation points of the needles.

  The filling material 9 is itself a material in the form of particles which is inserted between said layers at the time of their connection. As already mentioned above, the filling materials can have various shapes. They can thus be made up of foam or injected expandable liquid 7, of particles blown between

  said sheets, thick sheets or plates sewn between the two textile sheets during the binding operation, etc. The type of material used will depend on the final application of such an element.

  Such an element has in its final structure properties of rigidity, tightness, behavior, color, surface appearance, mechanical resistance, lightness which make this multilayer element of sound and / or thermal insulation a perfectly adapted element

  for application in construction.

Claims (1)

8 CLAIMS   1. Multilayer element (1) for sound and / or thermal insulation, characterized in that it comprises at least two textile sheets (2A, 2B) extending facing each other and formed each   an interlacing of warp threads or warp threads (4, 5) and of weft (6), said sheets (2A, 2B) being interconnected by multi-filaments and / or mono-   ) filaments (3) and / or yarns of binding fibers coming into engagement with each of the textile sheets (2A, 2B).   2. multilayer element (1) for sound and / or thermal insulation according to claim 1, characterized in that the textile sheets (2A, 2B) are interconnected by monofilaments (3) coming from   alternately engaged by weaving with each of the textile sheets (2A, 2B).   2) 3. multilayer element (1) for sound and / or thermal insulation according to one of claims 1 and 2,   characterized in that the textile sheets (2A, 2B) are interconnected by monofilaments passing through said sheets (2A, 2B) and kept in engagement with said sheets by gluing and / or by means of a binding wire s 'extending along the outer face of said textile sheets (2A, 2B).   4. Multilayer element (1) for sound insulation and / or   thermal according to one of claims 1 to 3, characterized in that the monofilament (3) is a fiber   polyester. 5. Multilayer element (1) for sound insulation and / or   thermal according to one of claims 1 to 4, characterized in that it comprises between said sheets (2A, 2B) optical fibers.   6. multilayer element (1) for sound and / or thermal insulation according to claim 5,   characterized in that at least a portion of the optical fibers consists of the monofilaments used for the connection between two textile sheets (2A, 2B).   7. multilayer element (1) for sound and / or thermal insulation according to one of claims 1 to 6,   characterized in that said textile sheets (2A, 2B) 10 are kept apart from one another by a filling material (9), such as an expandable injectable foam. 8. Multilayer element (1) for sound insulation and / or   thermal according to one of claims 1 to 7, characterized in that at least one of the textile sheets   (2A, 2B) is coated internally and / or externally with a layer of a curable binder, such as a resin   polyurethane or acrylic, to ensure the holding of 2) the whole of said element.   9. Method for manufacturing a multilayer element (1) for sound and / or thermal insulation according to one of   Claims 1 to 8.25, characterized in that at least two textile sheets (2A, 2B) are woven simultaneously and in parallel and in that   connects at the same time said sheets (2A, 2B) by means of monofilaments (3) and / or multi-filaments and / or yarns of binding fibers..3 <)