ES2578906T3

ES2578906T3 - Acoustic absorbent fabric

Info

Publication number: ES2578906T3
Application number: ES05802539.6
Authority: ES
Inventors: Didier Mouraret; Alain Tisseyre
Original assignee: Acoustic Fabric SC
Current assignee: Acoustic Fabric SC
Priority date: 2004-09-24
Filing date: 2005-09-23
Publication date: 2016-08-02
Anticipated expiration: 2025-09-23

Description

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DESCRIPCIONDESCRIPTION

Tejido absorbente acustico.Acoustic absorbent fabric.

La presente invencion se refiere a un tejido absorbente acustico.The present invention relates to an acoustic absorbent fabric.

Se sabe, por una serie de aplicaciones, destinadas en particular al equipamiento de edificios, o destinadas al equipamiento de infraestructuras de carreteras, del uso de elementos absorbentes acusticos. Estos elementos absorbentes acusticos estan a menudo constituidos por unos paneles de lana mineral o de espuma absorbente, posicionados detras de los paneles estructurales, tales como losas de techo metalico, estructuras de madera, de policloruro de vinilo, o membranas perforadas de policloruro de vinilo. Estos paneles de material absorbente tambien pueden estar dispuestos detras de los paneles de proteccion visual de pantallas de carretera.It is known, for a series of applications, aimed in particular at the equipment of buildings, or designed to equip road infrastructure, the use of acoustic absorbent elements. These acoustic absorbent elements are often constituted by panels of mineral wool or absorbent foam, positioned behind the structural panels, such as metal roof slabs, wooden structures, polyvinyl chloride, or perforated polyvinyl chloride membranes. These panels of absorbent material can also be arranged behind the visual protection panels of road screens.

Tambien se conoce por el documento FR 2 329 613 un amortiguador de sonido y un procedimiento para absorber el sonido, que se puede utilizar para reducir los niveles sonoros y las reverberaciones de los ruidos en las habitaciones, las salas de conferencias, los auditorios, los estadios cubiertos, los talleres de fabricacion y el metro, y para atenuar los sonidos en las largas trayectorias sonoras tales como los conductos y los pasillos. Este documento describe un tejido absorbente acustico que tiene las caracterfsticas del preambulo de la reivindicacion 1.Also known from document FR 2 329 613 is a sound absorber and a method for absorbing sound, which can be used to reduce sound levels and reverberations of noise in rooms, conference rooms, auditoriums, stadiums covered, manufacturing workshops and the metro, and to attenuate the sounds in long sound tracks such as ducts and corridors. This document describes an acoustic absorbent fabric having the characteristics of the preamble of claim 1.

En todos los casos, los paneles de lana mineral adolecen de inconvenientes en terminos de salubridad, en la medida en que pueden dar lugar a una emanacion significativa de fibras. Ademas, estos paneles de lana mineral o de espuma absorbente son voluminosos y pueden absorber humedad cuando se utilizan en un entorno exterior. Por ultimo, estos elementos no presentan una estetica agradable, por lo que deben ser utilizados detras de un soporte de revestimiento.In all cases, the panels of mineral wool suffer from drawbacks in terms of health, insofar as they can lead to a significant emanation of fibers. In addition, these mineral wool or absorbent foam panels are bulky and can absorb moisture when used in an outdoor environment. Finally, these elements do not present a pleasant aesthetic, so they must be used behind a coating support.

El objetivo de la invencion es proporcionar un elemento absorbente acustico, que sea de estructura simple, de utilizacion rapida, que sea estetico, que presente todas las garantfas de salubridad, y que pueda ser almacenado y utilizado en condiciones de bajo volumen.The aim of the invention is to provide an acoustic absorbent element, which is simple in structure, of rapid use, which is aesthetic, which has all the health guarantees, and which can be stored and used in low volume conditions.

Con este fin, la invencion es un tejido absorbente acustico, constituido por un tejido de vidrio realizado a partir de hilos de vidrio recubiertos de material termoplastico, con un factor de abertura comprendido entre 0,5 y 6%, estando el diametro de los hilos de vidrio comprendido entre 150 y 600 micras y preferentemente entre 270 y 400 micras.For this purpose, the invention is an acoustic absorbent fabric, constituted by a glass fabric made from glass threads covered with thermoplastic material, with an opening factor comprised between 0.5 and 6%, the diameter of the wires being of glass comprised between 150 and 600 microns and preferably between 270 and 400 microns.

Ventajosamente, se determinan el tamano y la forma de los orificios para obtener un coeficiente de absorcion acustica aw sabine con plenum de 10 cm comprendido entre 0,3 y 0,8, dependiendo de la frecuencia de los sonidos.Advantageously, the size and shape of the holes are determined to obtain an acoustic absorption coefficient aw sabine with a plenum of 10 cm comprised between 0.3 and 0.8, depending on the frequency of the sounds.

Esta forma y el factor de apertura de los orificios se pueden obtener directamente despues de la tejedura. El tejido se somete ventajosamente a un tratamiento termico, sin tension, que permite bloquear los hilos. Tambien es posible realizar una operacion de calandrado de un tejido con factor de apertura mas alto, para reducir el factor de apertura al valor deseado.This shape and the opening factor of the holes can be obtained directly after the weaving. The fabric is advantageously subjected to a heat treatment, without tension, which allows the threads to be blocked. It is also possible to perform a calendering operation of a fabric with a higher opening factor, in order to reduce the opening factor to the desired value.

La reduccion del factor de apertura tambien se puede obtener sometiendo por lo menos una de las caras del tejido a un recubrimiento con un ligante transparente o coloreado.The reduction of the opening factor can also be obtained by subjecting at least one of the faces of the fabric to a coating with a transparent or colored binder.

Ademas, el tftulo de los hilos de vidrio solos esta comprendido entre 22 y 136 tex, preferentemente entre 34 y 68 tex, y el tftulo de los hilos recubiertos de material termoplastico esta comprendido entre 60 y 200 tex, y preferentemente entre 95 y 165 tex.In addition, the title of the single glass threads is between 22 and 136 tex, preferably between 34 and 68 tex, and the yarn-coated yarn of thermoplastic material is between 60 and 200 tex, and preferably between 95 and 165 tex .

Se proporcionan a continuacion dos ejemplos de tejido absorbente acustico, obtenido a partir de hilos de vidrio que tienen las caracterfsticas anteriores.Two examples of acoustic absorbent fabric, obtained from glass yarns having the above characteristics, are given below.

Ejemplo 1Example 1

Composicion:Composition:

36% vidrio y 64% de PVC36% glass and 64% PVC

(policloruro de vinilo) + recubrimiento o calandrado 22 X 20 hilos/cm trenzado 1x2 0,55 mm(polyvinyl chloride) + coating or calendering 22 X 20 threads / cm braided 1x2 0.55 mm

- sentido urdimbre> 150 daN/5 cm- Warp direction> 150 daN / 5 cm

- sentido trama> 150 daN/5 cm 1 a 2%- plot sense> 150 daN / 5 cm 1 to 2%

M1M1

0,60.6

Densidad:Density:

Motivo:Reason:

Espesor:Thickness:

Resistencia a la ruptura:Resistance to rupture:

Factor de apertura: Clasificacion de fuego: Coeficiente aw sabine:Opening factor: Fire rating: coefficient aw sabine:

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Ejemplo 2Example 2

Composicion:Composition:

Densidad:Density:

Motivo:Reason:

Espesor:Thickness:

Resistencia a la ruptura:Resistance to rupture:

36% vidrio y 64% de PVC 26 X 21 hilos/cm trenzado 1x2 0,55 mm36% glass and 64% PVC 26 X 21 threads / cm braided 1x2 0.55 mm

- sentido urdimbre> 150 daN/5 cm- Warp direction> 150 daN / 5 cm

- sentido trama> 150 daN/5 cm 1 a 2%- plot sense> 150 daN / 5 cm 1 to 2%

M1M1

0,60.6

Este tejido se puede utilizar, en particular, en las siguientes situaciones:This fabric can be used, in particular, in the following situations:

- en lugar de paneles de lana mineral o espuma absorbente acustica, posicionados detras de los paneles estructurales, tales como losas de techos metalicos, estructuras de madera, de policloruro de vinilo o tela de membrana o de policloruro de vinilo perforada;- instead of mineral wool panels or acoustic absorbent foam, positioned behind structural panels, such as metal roof slabs, wooden structures, polyvinyl chloride or membrane fabric or perforated polyvinyl chloride;

- en sustitucion de productos absorbentes detras de los paneles de proteccion visual de pantallas de carretera;- in substitution of absorbent products behind the panels for the visual protection of road screens;

- en forma de tela tensada sobre una estructura metalica, o sobre unos cables;- in the form of a fabric tensioned on a metal structure, or on cables;

- o tambien contraencolado sobre una estructura portadora tal como una estructura alveolar.- or also bonded on a carrier structure such as a honeycomb structure.

Como se desprende a partir de lo expuesto anteriormente, la invencion aporta una gran mejora a la tecnica existente, proporcionando un elemento absorbente acustico de estructura simple, que se puede utilizar directamente y no detras de una fachada decorativa, ya que el propio tejido absorbente presenta unas propiedades decorativas, de bajo peso, de bajo volumen y que presenta todas las condiciones de salubridad y de fiabilidad, dada la ausencia de degradacion con el tiempo, incluso si el tejido se somete a la intemperie.As can be seen from the foregoing, the invention provides a great improvement to the existing technique, providing an acoustic absorbent element of simple structure, which can be used directly and not behind a decorative facade, since the absorbent fabric itself presents some decorative properties, of low weight, of low volume and that presents all the conditions of healthiness and reliability, given the absence of degradation with time, even if the fabric is subjected to the elements.

Es evidente que la invencion no esta limitada a las unicas formas de realizacion de este tejido descritas anteriormente a tftulo de ejemplos, sino que abarca por el contrario todas sus variantes de realizacion que permanecen dentro del alcance de las reivindicaciones.It is evident that the invention is not limited to the only embodiments of this fabric described above by way of examples, but instead covers all its variants of embodiment that remain within the scope of the claims.

Claims

1. Acoustic absorbent fabric constituted by a glass fabric, the diameter of the glass threads 5 being between 150 and 600 microns and preferably between 270 and 400 microns, the absorbent fabric being

Acoustic characterized in that it is made from glass threads covered with thermoplastic material, with an opening factor comprised between 0.5 and 6%.

Acoustic absorbent fabric according to claim 1, characterized in that the size and shape of the holes are determined to obtain an acoustic absorption coefficient aw sabine with a plenum of 10 cm comprised between

0.3 and 0.8, depending on the frequency of the sounds.

Acoustic absorbent fabric according to one of claims 1 to 2, characterized in that the layer of single glass strands is comprised between 22 and 136 tex, preferably between 34 and 68 tex, and the coated yarn strand.

15 of thermoplastic material is between 60 and 200 tex, and preferably between 95 and 165 tex.

Acoustic absorbent fabric according to one of claims 1 to 3, characterized in that the fabric is subjected to a heat treatment, without tension.

5. Acoustic absorbent fabric according to one of claims 1 to 4, characterized in that the fabric is subjected to

a calendering operation.

Acoustic absorbent fabric according to one of claims 1 to 5, characterized in that the fabric is subjected, on at least one of its faces, to a coating of a transparent or colored binder.