EP0580531A1 - Base fabric for tufted products - Google Patents

Abstract

Tufting base fabric (support) in which the yarns which will form the wear surface of a tufted carpet are attached by tufting, characterised in that it consists of a woven fabric, which is not desized (de-oiled) and is virtually undeformable under the normal conditions of use, and consists of glass yarns impregnated with a polymer material, so as to embed a large number of filaments constituting each glass yarn and, thereafter, to limit substantially, during the tufting, direct contacts between, on the one hand, the yarns forming the woven glass fabric and, on the other hand, the needles of the tufting machine and the yarns used for producing the wear surface. Application of the tufting base fabric to the manufacture of tufted carpets.

Description

The invention relates to the support of tufted carpets in which the threads which constitute the surface of use of the carpet are stitched.

The support will be in the following description designated by "tuft support". Also to simplify the understanding of the present application, the area of use of the carpet will also be designated by "velvet": consequently, the term velvet cannot be interpreted restrictively as designating certain structures of velvet, but must include all the structures carpeted surfaces. By extension, the threads making up the surface area for carpeting will be called "velvet threads".

In their basic principle, tufted carpets are obtained using several tens of needles aligned across the width of the carpet which stitch through the prefabricated tuft support the threads which will form the surface of use . With the velvet yarn, the construction of the surface of use is a qualitative factor of the carpet on which depend its performances of use, its esthetics and its longevity.

Five parameters then come into play: the title of the pile, the weight of the pile, the height of the pile, and the tightness of the pile in the direction of the width (gauge) and the length of the carpet. The tightening in the lengthwise direction is expressed by a number of points (ie velvet tufts or loops) per linear meter. On tufting looms, the spacing between the needles which prick the thread in the tuft support conditions the tightening in the width direction. These five parameters condition the density of the velvet which, depending on the case, can be tight and dense or, on the contrary, loose, fragile, not very resistant to crushing and aesthetically poor.

Another major quality factor of the carpet is the tuft support. Indeed, an efficient velvet yarn, a rigorous velvet construction or a resistant tuft support cannot by themselves make a good carpet. The quality of a tufted carpet is the result of a balanced combination of all the components that work together, strengthen, add their forces to multiply the effects. This is why tuft supports are required to be able to satisfy both the process and the finished product constraints.

• il doit être manipulable pour pouvoir être transformé. Pour ce faire, on lui demande d'être suffisamment rigide, de ne pas s'effilocher, notamment à l'occasion d'une découpe, et de ne pas présenter de modification du réseau, notamment par éraillement.
• à l'issue de l'opération de tuftage, il doit conserver des propriétés mécaniques suffisantes car sinon il ne lui est pas possible de résister aux contraintes des opérations ultérieures.
• il doit posséder une stabilité dimensionnelle suffisante, même sous tension et sous des températures élevées de l'ordre de 150-200°C.

Indeed, the qualities of the tuft support greatly condition the conditions of the construction of the velvet. To allow the tufting operation industrially, the tuft support must fulfill the following conditions:

• it must be manipulated to be able to be transformed. To do this, it is asked to be sufficiently rigid, not to unravel, especially during cutting, and not to present any modification of the network, in particular by derailment.
• at the end of the tufting operation, it must retain sufficient mechanical properties because otherwise it is not possible for it to resist the constraints of subsequent operations.
• it must have sufficient dimensional stability, even under tension and at high temperatures of the order of 150-200 ° C.

The qualities of the tuft support also condition the use performance of the finished product because it contributes to its solidity and longevity. This is why, it is highly desirable that the tuft support is both sufficiently rigid and non-deformable to maintain the flatness of the carpet and that its dimensional stability is sufficient under the combined action of temperature, humidity and usage constraints.

Currently, woven or non-woven fabrics of synthetic material are widely used as a tuft support: the material usually used is either a woven polypropylene or a non-woven polyester, the latter being the most used despite its creep .

Although such fabrics have a number of advantageous characteristics, they also have drawbacks. They do not fully meet the requirements for dimensional stability and may retain deformation after torsion. These defects are inevitably transmitted to the finished product which may, for example, not have sufficient dimensional stability under the action of temperature, humidity or other constraints of use. The finished product may also not have sufficient rigidity which could lead to a flatness defect even after torsion (lack of resilience). Another difficulty is due to the fact that the woven and non-woven fabrics of synthetic material of organic origin can be difficult to use for tufting because their mechanical properties are not suitable. And in fact, these fabrics tend to stretch under tension.

It has also been proposed, in US Pat. No. 3,642,516, more than twenty years ago, a tuft support which must have improved dimensional stability. Said tuft support is a woven or non-woven fabric constructed with glass threads sheathed using a vinyl plastisol, said woven or non-woven fabric then being covered with a resin (I) which adheres to the vinyl plastisol but is not compatible with this vinyl plastisol.

• la contexture du tissé ou non-tissé de fils de verre doit être ouverte, c'est à dire présenter des jours entre les fils de verre que l'on remplit au moyen de la résine (I) précitée ;
• la proportion de polymère organique dans le support de tuft en cause, à savoir le plastisol vinylique et la résine (I), doit être comprise entre 30 et 70 % en poids, de préférence au moins égale à 50 % en poids du support de tuft.

According to US Patent 3,642,516:

• the texture of the woven or nonwoven of glass strands must be open, that is to say present days between the glass strands which are filled by means of the abovementioned resin (I);
• the proportion of organic polymer in the tuft support in question, namely the vinyl plastisol and the resin (I), must be between 30 and 70% by weight, preferably at least equal to 50% by weight of the tuft support .

In this way, according to this patent, the glass strands of this tuft support retain a certain degree of mobility during tufting.

It is specified in this patent that such a tuft support requires from 25% to 45% of tufting force in addition to that necessary for tufting an open woven of glass threads covered with a vinyl coating, after heat treatment. (merger).

• gainage des fils de verre au moyen d'un plastisol vinylique ;
• tissage des fils de verre gainés selon une contexture ouverte ;
• dépôt sur le tissé ouvert d'une couche d'une résine (I) adhérente mais non compatible avec le plastisol vinylique pour bénéficier d'une force d'adhérence contrôlée entre les fils de chaîne et les fils de trame (i.e. ni trop élevée, ni trop faible);
• traitement thermique à une température inférieure à la température de fusion du plastisol vinylique afin de fixer la couche de résine (I) et de former un support de tuft stable.

The manufacturing process for this tuft support includes the following steps:

• cladding of glass strands using vinyl plastisol;
• weaving sheathed glass strands in an open texture;
• deposition on the open woven of a layer of an adhesive resin (I) but not compatible with vinyl plastisol to benefit from a controlled adhesion force between the warp threads and the weft threads (ie neither too high, neither too weak);
• heat treatment at a temperature below the melting temperature of the vinyl plastisol in order to fix the resin layer (I) and to form a stable tuft support.

In view of the above, such a tuft support is in practice complicated to manufacture, in particular because of the numerous process steps and the choice of resin (I). Consequently, such a tuft support is prohibitive, and all the more so since it contains a high proportion of organic polymers.

In addition, such a support may be toxic as soon as it is subjected to high temperatures (due to a fire for example) because the vinyl plastisol recommended in this patent is a polyvinyl chloride.

The invention aims to remedy the drawbacks of the prior art and in particular to simply produce a tuft support whose high mechanical characteristics on the one hand, facilitate the tufting operation as well as the other operations necessary for the manufacture of 'a tufted carpet and on the other hand, guarantee to the tufted carpet performance of use and a long longevity.

More specifically, the subject of the invention is a tuft support in which the threads which will form the working surface of a tufted carpet are fixed by tufting, characterized in that it consists of a non-desensitized woven fabric, practically non-deformable under normal conditions of use, and consisting of glass strands impregnated with a polymeric material, in order to coat a large number of the filaments constituting each glass strand and therefore to substantially limit, during tufting , the direct contacts between on the one hand, the threads forming the woven glass and on the other hand, the needles of the tufting loom and the threads useful for achieving the surface of use.

Even if the tuft support sees its mechanical characteristics significantly lowered due to tufting, the Applicant has discovered that contrary to what those skilled in the art have thought up to now and contrary to the teaching provided in the patent US 3,642,516, they remain very sufficient for the accomplishment of the industrial process of manufacturing a tufted carpet: it is believed that the maintenance of the mechanical characteristics at a sufficient level is essentially due to the particular choice of the woven glass which is not desensitized (it ie unbleached) and almost non-deformable under normal conditions of use (this non-deformability is the direct consequence of the tight weaving of the glass strands), in combination with an impregnation of the glass strands with an appropriate polymer material.

Also, despite the abrasive nature of the glass yarn with respect to certain velvet yarns, the tufting operation using the tuft support according to the invention did not lead to premature wear of the velvet yarn.

The tuft support according to the invention can therefore easily undergo the tufting operation and the subsequent operations necessary for the manufacture of quality tufted carpet.

Unbleached glass woven fabrics, that is to say glass woven fabrics which have not undergone a heat and / or chemical treatment to remove the size of the wire and the sizing of the warp, are suitable for the invention. Indeed, desensed glass woven fabrics do not have sufficient mechanical properties for use as a tuft support.

Another important parameter for the tuft support lies in the non-deformability of the glass woven under normal conditions of use, that is, in other terms in the weaving of glass strands which must be tightened (as opposed to an open weaving revealing days visible to the naked eye and allowing displacements of the network formed by the glass strands). Indeed, to technically allow tufting, it is important that the woven glass is almost non-deformable under normal conditions of use, that is to say that it mainly has sufficient dimensional stability in traction, without scuffing or displacement of the network formed by glass threads under the action of tufting needles.

The structure of the threads used for the glass woven can be very diverse: one can choose either simple threads, twisted or not, as assembled ones (for example assembled ones comprising at least two simple threads assembled by twisting) or twists or many other structures provided that the woven fabric, which includes them, is sufficiently non-deformable under normal conditions of use.

Advantageously, single threads or assembled threads or plies are used which are preferably twisted with a slight twist of the order of 10 turns / m or greater, or even better, with a twist of the order of 20 turns / m or higher.

• le tissé de verre, avant traitement avec une matière polymère (ce traitement pouvant être réalisé sur le tissé de verre ou le fil de verre avant tissage), possède un poids au m² d'au moins 100 g et comprend pour 100g/m² au moins 12 fils de verre en chaîne par cm et au moins 12 fils de verre en trame par cm, le titre de ces fils de verre :
  • * en chaîne et en trame pouvant être égal ou différent et
  • * étant au moins égal à 34 tex.
• pour environ 100g/m² et un titre de fil de verre de l'ordre de 34 tex, le tissé de verre servant à réaliser le support de tuft est composé d'environ 12 fils en chaîne par cm et environ 12 fils en trame par cm.

The tuft support of the invention can also have one of the following characteristics:

• glass woven, before treatment with a polymeric material (this treatment can be carried out on glass woven or glass yarn before weaving), has a weight per m² of at least 100 g and includes for 100g / m² at least 12 glass strands per cm and at least 12 glass strands per cm, the title of these glass strands:
  • * in warp and weft which may be equal or different and
  • * being at least equal to 34 tex.
• for about 100 g / m² and a glass yarn count of about 34 tex, the glass woven fabric used to make the tuft support is composed of about 12 warp threads per cm and about 12 weft threads per cm .

• (a) le tissé de verre possède un poids au m² d'environ 160 g (matière polymère exclue) ou supérieur, et comprend au moins 12 fils de verre en chaîne par cm et au moins 12 fils de verre en trame par cm, le titre de ces fils de verre :
  • en chaîne et en trame pouvant être égal ou différent, et,
  • étant d'environ 68 tex ou supérieur.
• (b) le tissé de verre, pour un poids d'environ 210 g/m² (matière polymère exclue) ou supérieur, et un titre de fil de verre de l'ordre de 68 tex ou supérieur, comprend environ 17,5 ou plus de fils en chaîne par cm et environ 12,5 ou plus de fils en trame par cm.
• (c) le tissé de verre possède un poids au m² compris entre 160 g et 300 g environ (matière polymère exclue), et il comprend, pour environ 300 g/m² (matière polymère exclue) et un titre d'environ 136 tex, 9 fils de verre en chaîne par cm et 13 fils de verre en trame par cm.
• (d) le tissé de verre possède un poids au m² au moins égal à 160 g (matière polymère exclue) et comprend de l'ordre de 4800 ou plus de filaments de verre en chaîne par cm et de l'ordre de 4800 ou plus de filaments de verre en trame par cm.
• (e) le tissé de verre, pour un poids d'environ 210 g/m² (matière polymère exclue) ou supérieur, comprend de l'ordre de 7000 ou plus de filaments de verre en chaîne par cm, et de l'ordre de 4800 ou plus de filaments de verre en trame par cm.

Preferably, the tuft support of the invention has one of the following characteristics (a) to (e):

• (a) the glass woven fabric has a weight per m² of approximately 160 g (excluding polymeric material) or more, and comprises at least 12 strands of glass warp per cm and at least 12 strands of glass warp per cm, the title of these glass strands:
  • in warp and weft which may be equal or different, and,
  • being about 68 tex or higher.
• (b) the glass woven fabric, for a weight of approximately 210 g / m² (polymer material excluded) or greater, and a glass yarn count of the order of 68 tex or greater, comprises approximately 17.5 or more of warp threads per cm and about 12.5 or more weft threads per cm.
• (c) the woven glass has a weight per m² of between 160 g and 300 g approximately (polymer material excluded), and it comprises, for approximately 300 g / m² (polymer material excluded) and a titer of approximately 136 tex, 9 strands of glass warp per cm and 13 strands of glass weft per cm.
• (d) the woven glass has a weight per m² at least equal to 160 g (polymer material excluded) and comprises of the order of 4800 or more of glass filaments in warp per cm and of the order of 4800 or more of glass filaments in weft per cm.
• (e) the glass woven, for a weight of approximately 210 g / m² (polymer material excluded) or greater, comprises of the order of 7000 or more of glass filaments in warp per cm, and of the order of 4800 or more weft glass filaments per cm.

The maximum number of glass threads or glass filaments per cm of woven fabric is not critical.

In practice, it is of course desirable, in a tight woven fabric, to limit the number of glass threads or glass filaments so that this woven fabric is flat and non-deformable under normal conditions of use. The number of glass strands or filaments to be provided in the tight woven will essentially depend on the diameter of the glass filaments, the structure of the glass strand and the texture of the woven.

Also preferably, the diameter of the filaments forming the glass wire is of the order of 9 microns.

Very high results have been obtained with tuft supports fulfilling the characteristics (b) or (e), and are even better when the diameter of the filaments is of the order of 9 microns.

Advantageously, the tuft support is made from a woven glass weave fabric which guarantees an effective hold of the network of threads and makes the woven glass almost non-deformable under normal conditions of use.

According to the invention, the tuft support consists of a non-desensitized glass woven fabric, of threads impregnated with a polymeric material in order to protect the glass threads from tufting needles and to make the woven fabric more manageable during tufting.

The impregnation operation can also be carried out on the glass yarn before weaving, or on the glass woven. It has been found that this operation makes it possible to coat a large number of filaments constituting each glass wire: hence an impregnation at the heart of the wire.

• un ou plusieurs agents facilitant la dépose du polymère sur le tissé tels que des agents anti-mousse,
• un ou plusieurs agents de rhéologie,
• un ou plusieurs agents hydrofugeants,
• un ou plusieurs agents anti-tâches.

Preferably, the woven is impregnated by passing it through baths, preferably aqueous, which comprise the polymeric material in solution or in emulsion, and where appropriate:

• one or more agents facilitating the deposition of the polymer on the woven material such as anti-foaming agents,
• one or more rheology agents,
• one or more water repellents,
• one or more anti-stain agents.

Advantageously, these baths contain at least one slip agent in order to further facilitate the passage of the needles through the glass woven treated during tufting. The slip agent is selected from the compounds known to provide a slip effect by not remembering that those which do not interfere with operations subsequent to tufting: thus, an important selection criterion of the slip agent lies in the fact that it must hardly affect the adhesion capacity of the tuft support with the other components. carpet foundations.

These baths preferably contain about 0.1 to 1% by weight of slip agent.

After leaving the bath, the treated glass woven fabric is generally wrung out and then dried.

The polymers suitable for the invention are the polymers capable of undergoing the transformation cycles induced by the manufacture of the tufted finished product without undergoing degradation. In particular, the polymers chosen must not change state under the temperature (ie around 150-200 ° C) and humidity conditions of this manufacture.

Among the polymers which can be used to treat glass woven or glass strands, mention may be made of polyurethanes, styrene-butadiene resins, acrylic resins or copolymers of the monomers useful for the manufacture of the abovementioned polymers. On the other hand, it is desirable not to use halogenated polymers when they can lead to the formation of significant quantities of gases dangerous to humans during a fire.

The glass woven fabrics treated in accordance with the invention, achieving the best performance as a tuft support, have, before tufting, preferably a tensile strength in the transverse direction at least equal to 175 daN for 5 cm according to ISO 4606, while a polyester nonwoven has, before tufting, a tensile strength in the transverse direction significantly lower and generally around 32 daN per 5 cm (according to ISO 4606).

However, glass woven fabrics treated in accordance with the invention, having before tufting a tensile strength in the transverse direction of less than 175 daN per 5 cm (according to ISO 4606), can also constitute satisfactory tuft supports.

The polymeric material represents a weight per m² of woven glass which is preferably chosen to be greater than or equal to 4 g, more preferably still to be greater than or equal to 6 g.

The weight of polymeric material per m² of woven glass is preferably less than 30 g, more preferably less than or equal to 25 g, or even better, less than or equal to 20 g.

The best results obtained to date, in terms of quality and price, for the tuft supports of the invention, correspond to a weight of polymeric material per m² of glass woven between 6 g and 15 g (inclusive). Beyond 15 g / m², it has indeed been found that the gain in mechanical performance is low.

• comme évoqué précédemment, il conserve des caractéristiques mécaniques suffisantes qui lui permettent de subir facilement le tuftage et les transformations ultérieures au tuftage, qui sont généralement :
  • . l'enduction sur l'envers du support tufté à l'aide, par exemple, d'un copolymère styrène-butadiène pour fixer les fils de tuft au support,
  • . la construction des fondations de la moquette, généralement au moyen d'une matière polymère pouvant être du polychlorure de vinyle ou du bitume, éventuellement renforcé à l'aide d'un ou de plusieurs non-tissés ou d'une grille de verre. Grâce aux qualités du support de tuft de l'invention et en particulier à sa grande stabilité dimensionnelle, il n'est en fait pas nécessaire de renforcer les fondations de la moquette à l'aide d'un ou plusieurs non-tissés ou d'une grille de verre ;
  • . la découpe en dalle ou en lés de la moquette tuftée.
• au cours du tuftage, il ne provoque pas d'usure anormale du fil de velours et on ne constate aucune abrasion des aiguilles comme cela peut être le cas des couteaux servant à la découpe des tissus de verre.
• l'opération de tuftage n'affecte pas le réseau des fils de verre (quasiment pas de déformation du réseau) et l'orthogonalité du réseau nécessaire pour atteindre le niveau souhaité des caractéristiques mécaniques est donc conservée.
• il possède une grande stabilité dimensionnelle dans les conditions normales de température, d'humidité et de contraintes du procédé de fabrication des moquettes tuftées, aussi peut-il subir facilement les cycles de transformation de la fabrication d'une moquette sans se déformer au cours de ces cycles ou ultérieurement et ceci bien qu'il soit maintenu sous tension et soumis à des températures de l'ordre de 150 à 200°C.
• les installations classiques de fabrication des moquettes tuftées n'ont pas besoin d'être modifiées pour transformer le support de tuft selon l'invention et l'opération de tuftage ne nécessite pas une force de tuftage accrue par rapport à celle nécessaire pour un non-tissé en polyester (contrairement au support de tuft revendiqué dans le brevet US 3,642,516).

The tuft support according to the invention is advantageous in more than one way. First of all it has the qualities of known tuft supports. But it is distinguished by its completely surprising and advantageous behavior in the industrial process. Finally, its chemical nature allows it to produce high quality tufted carpets. So :

• as mentioned above, it retains sufficient mechanical characteristics which allow it to easily undergo tufting and post-tufting transformations, which are generally:
  • . coating the back of the tufted support using, for example, a styrene-butadiene copolymer to fix the tuft threads to the support,
  • . the construction of the foundations of the carpet, generally by means of a polymer material which may be polyvinyl chloride or bitumen, possibly reinforced with one or more nonwovens or a glass grid. Thanks to the qualities of the tuft support of the invention and in particular to its great dimensional stability, there is in fact no need to reinforce the foundations of the carpet with one or more nonwovens or a glass grid;
  • . cutting in tiles or strips of the tufted carpet.
• during tufting, it does not cause abnormal wear of the velvet yarn and there is no abrasion of the needles as can be the case with knives used for cutting glass fabrics.
• the tufting operation does not affect the network of glass strands (practically no deformation of the network) and the orthogonality of the network necessary to reach the desired level of mechanical characteristics is therefore preserved.
• it has great dimensional stability under normal conditions of temperature, humidity and constraints of the manufacturing process of tufted carpets, so it can easily undergo the transformation cycles of the manufacture of a carpet without deforming during these cycles or later and this although it is kept under tension and subjected to temperatures of the order of 150 to 200 ° C.
• conventional installations for manufacturing tufted carpets do not need to be modified to transform the tuft support according to the invention and the tufting operation does not require an increased tufting force compared to that necessary for a non woven in polyester (unlike the tuft support claimed in US Patent 3,642,516).

• sa grande stabilité dimensionnelle, qui permet notamment de supprimer les renforts habituellement insérés dans les fondations de la moquette ;
• sa planéité même après torsion.

The tuft support according to the invention applies more particularly to the manufacture of tufted carpets. It gives them a lasting aesthetic appearance due to:

• its great dimensional stability, which allows in particular to remove the reinforcements usually inserted in the foundations of the carpet;
• its flatness even after twisting.

This is why carpets which use the tuft support according to the invention can be laid without glue.

This also explains that the carpets using the tuft support according to the invention have good behavior under the action of temperature, humidity and other constraints of use. In this regard, it was noted that the joints between the tiles tufted according to the invention remain invisible over time. In addition, the use of the tuft support according to the invention improves the flame resistance properties of the finished products.

The characteristics and advantages of the invention will now be illustrated through a nonlimiting example of the invention.

EXAMPLE:

The glass woven exemplified is a woven fabric composed of glass threads whose filaments have a diameter equal to 9 microns, having in warp and weft the same title which is 68 tex for a texture 17.5 x 12.5 ( which means 17.5 warp threads per cm and 12.5 weft threads per cm). In addition, the weight per square meter of this unbleached glass cloth is equal to 210 g.

• une résine acrylique en proportion suffisante pour avoir, après essorage et séchage, une imprégnation de 6 g par mètre carré de toile ;
• un agent glissant, à raison de 0,5 % en poids.

The unbleached glass cloth is unwound in an aqueous bath containing, in solution:

• an acrylic resin in sufficient proportion to have, after spinning and drying, an impregnation of 6 g per square meter of canvas;
• a slip agent, at a rate of 0.5% by weight.

As specialists know, it is possible to use other impregnation methods and other polymers, provided that they can be subjected to the manufacturing process of tufted carpet, without changing physical state.

Once dried, the glass cloth impregnated with acrylic resin can be used as a tuft support.

The mechanical characteristics of the support obtained are as follows:

Although the tensile strength is considerably reduced due to tufting, in the transverse direction it remains sufficient so that the glass cloth impregnated with acrylic resin can be subjected, without difficulty, then to the other operations necessary for the manufacture of a carpet tufted, namely a coating followed by the construction of the foundations of the carpet.

It should be noted that because of its non-deformability, its rigidity and its perfect flatness, even in large widths, it is not necessary to subject the glass woven fabrics, treated in accordance with the invention, to longitudinal traction ( ie direction of travel of the machine) high during the various transformations.

Claims (17)

1 / Tuft support in which are fixed by tufting the threads which will form the surface of use of a tufted carpet, characterized in that it consists of a non-desensitized woven fabric, almost non-deformable under normal conditions of use, and consisting of glass strands impregnated with a polymeric material in order to coat a large number of the filaments constituting each glass strand, and therefore to substantially limit, during tufting, the direct contacts between a on the one hand, the threads forming the woven glass and on the other hand, the needles of the tufting loom and the threads useful for producing the use surface. 2 / Tuft support according to claim 1, characterized in that the glass woven, before treatment with a polymeric material, has a weight per m² of at least 100 g and comprises for 100 g / m², at least 12 threads of warp glass per cm and at least 12 weft glass threads per cm, the title of these glass threads: - warp and weft which may be equal or different, and, - being at least equal to 34 tex. 3 / Tuft support according to claim 1, characterized in that, for approximately 100 g / m² and a glass yarn count of the order of 34 tex, the glass woven is composed of about 12 warp yarns per cm and about 12 threads in weft per cm. 4 / Tuft support according to claim 1, characterized in that the woven glass has a weight per m² of about 160 g (excluding polymeric material) or more and comprises at least 12 glass strands of warp per cm and at least 12 weft glass threads per cm, the title of these glass threads: - warp and weft which may be equal or different, and, - being about 68 tex or higher. 5 / Tuft support according to claim 1 or 4, characterized in that for a weight of approximately 210 g / m² (polymer material excluded) or greater and a glass yarn count of the order of 68 tex or greater, the glass woven fabric comprises about 17.5 or more weft yarns per cm and about 12.5 or more weft yarns per cm. 6 / Tuft support according to claim 1 or 4, characterized in that the glass woven has a weight per m² of between 160 g and 300 g approximately (polymer material excluded), and that it comprises, for approximately 300 g / m² (polymer material excluded) and a titer of the order of 136 tex, 9 strands of glass warp per cm and 13 strands of glass weft per cm. 7 / Tuft support according to claim 1, characterized in that the woven glass has a weight per m² at least equal to 160 g (polymer material excluded), and comprises of the order of 4800 or more of glass filaments in warp per cm, and of the order of 4800 or more of glass filaments in weft per cm. 8 / Tuft support according to claim 1 or 7, characterized in that for a weight of about 210 g / m² (polymer material excluded) or greater, the woven glass used to make the tuft support comprises of the order of 7000 or more of glass filaments in warp per cm, and of the order of 4800 or more of glass filaments in weft per cm. 9 / Tuft support according to one of claims 1 to 8, characterized in that the thickness of the filaments forming the glass thread is of the order of 9 microns. 10 / Tuft support according to one of claims 1 to 9, characterized in that the woven glass is of plain weave. 11 / Tuft support according to one of claims 1 to 10, characterized in that the polymeric material is chosen from polyurethanes, styrene-butadiene resins, acrylic resins or copolymers of the monomers useful for the manufacture of the aforementioned polymers. 12 / Tuft support according to one of claims 1 to 11, characterized in that the polymeric material represents a weight per m² of woven glass which is greater than or equal to 4 g, preferably greater than or equal to 6 g. 13 / Tuft support according to claim 12, characterized in that the polymer material represents a weight per m² of glass woven material which is less than 30 g, preferably less than or equal to 25 g, and more preferably less than or equal to 20g. 14 / Tuft support according to claim 13, characterized in that the polymeric material represents a weight per m² of woven glass which is between 6 and 15 g (included). 15 / Tuft support according to one of claims 1 to 14, characterized in that the treatment intended to impregnate the threads forming the glass woven with a polymeric material is accompanied by a treatment with a slip agent promoting the passage of tufting needles through the tuft holder. 16 / Tuft support according to one of claims 1 to 15, characterized in that the glass woven fabric consisting of threads impregnated with a polymer material has a tensile strength in the transverse direction at least equal to 175 daN for 5 cm , measured according to ISO 4606. 17 / Tufted carpet, characterized in that it is made from a tuft support according to one of claims 1 to 16.