EP1818434A1 - Extensible terry fabric made from polyterephthalate, in particular PBT - Google Patents

Abstract

The material, made from interwoven weft (3) and warp (1, 2) yarns with loops, has one or more yarns in either direction made from an elastic polymer material, while the other yarns lying parallel to the elastic yarns are made so that the material can stretch in the appropriate direction(s). The elastic yarns can form anything from 10 to 90 per cent of the warp and/or weft yarns, typically 33 per cent, and all the looped yarns are of non-elastic material. The loops can also be cut to produce a cut pile effect.

Description

The present invention relates to a textile article in the field of towels consisting of a terry-type terry cloth.

It is conventional in the field of towels to use terry-type terry fabrics, consisting in particular of an interweaving of weft threads, warp threads and loop or loop warp threads, the threads being a material suitable for the sponge. Classic items made from a terry cloth of this type include bath towels, bathrobes, washcloths, etc.

In the prior art, there is already known an article of sponge-woven washcloth, in particular a bath towel, woven with sponge material threads comprising an interweaving of the weft threads and bottom warp threads, and at least one thread of weft warp and / or an interlacing bottom warp yarn being of an elastic material while the other inelastic material yarns parallel to the at least one elastic yarn are formed to allow stretching of the article in the direction of elastic threads from the unstretched position of the elastic threads, the interlacing further comprising loop warp threads.

Having thus provided elastic threads to form part of the weft threads or the bottom warp threads makes it possible to obtain a towel which can be tied around oneself more easily and which thus maintains elasticity the linen tied around the waist for example. However, the bathroom linen is intended to be soaked with water during use. But by being soaked with water, the linen gradually loses its elasticity and towels can not be tied around the size of the user and stay there knotted without the user having to hold it by hand. Finally, the washing of these towels also increases this loss of elasticity, the article after five or six washes and / or after a certain period of use, is not very soft, nor very pleasant to the touch.

The document US 2005/0142970 refers to a vehicle seat. It is mentioned the possible use of PTT or PBT as an elastic material for achieving damping, the PTT or PBT being advantageously resistant to a repeated cycle of compression / decompression.

The document EP 1316634 discloses the use of PTT in a fabric to ensure that it does not absorb water, i.e., the fabric is impermeable and does not imbibe water. It is not described, however, that after being washed and / or soaked with water for long and repeated periods, it will retain its elasticity.

The present invention aims to overcome these drawbacks by proposing a new article of towels which, even after being used a large number of times and especially having been soaked with water, retains enough elasticity to be tied around the waist of a person and remain tied there without this person having to hold it in the hand.

According to the invention, an article of bathroom linen is as defined in one of claims 1 to 9.

According to a preferred embodiment of the invention, from 10 to 80 or 90% of the weft threads are of elastic material, especially 25 to 75%, for example 33%.

According to a preferred embodiment of the invention, from 10 to 80 or 90% of the bottom warp threads are of elastic material, preferably between 25 and 75%, for example 33%.

Preferably, the loop threads are all non-elastic material.

According to a preferred embodiment of the invention, the loops are shaved to obtain a velvet effect.

According to a preferred embodiment of the invention, the weft threads intersect the bottom warp and loop warp threads perpendicularly.

According to a preferred embodiment of the invention, the non-elastic threads are of cotton.

The present invention also relates to a method of manufacturing an article of bathroom linen as described above.

• La figure 1 représente une partie d'un tissu ;
• La figure 2 représente schématiquement un métier à tisser pour le tissage d'un tissu suivant l'invention ;
• La figure 3a représente un tissu constitué d'un entrelacement de fils de chaîne de fond et de boucles avec des fils de trame, sans insertion de fil élastique ;
• La figure 3b représente l'armure utilisée pour obtenir l'entrelacement représenté à la figure 3a ;
• La figure 4 représente le profil du tissu de la figure 3a ;
• La figure 5a représente un exemple de tissu suivant l'invention, des fils en matériau élastique étant insérés parmi les fils de trame ;
• La figure 5b représente l'armure utilisée pour l'obtention du tissu de la figure 5a ;
• La figure 6 représente le tissu de la figure 5a vu de profil ;
• La figure 7 représente une armure préférée pour la réalisation de parties plates comme des ourlets, sens trame ;
• La figure 8a représente un tissu suivant l'invention dans lequel des fils élastiques sont insérés parmi les fils de chaîne de fond ;
• La figure 8b représente une armure pour l'obtention du tissu de la figure 8a ;
• La figure 9a représente un tissu dans lequel des fils élastiques sont insérés dans les fils de trame et dans les fils de chaîne de fond ; et
• La figure 9b représente une armure pour l'obtention de la figure 9a.

Exemplary embodiments are now described by way of example only with reference to the drawings in which:

• Figure 1 shows a part of a fabric;
• Figure 2 schematically shows a loom for weaving a fabric according to the invention;
• Figure 3a shows a fabric consisting of intertwining of bottom warp yarns and loops with weft yarns without insertion of elastic yarn;
• Figure 3b shows the armor used to obtain the interlacing shown in Figure 3a;
• Figure 4 shows the profile of the fabric of Figure 3a;
• FIG. 5a represents an example of a fabric according to the invention, son of elastic material being inserted among the weft threads;
• Figure 5b shows the weave used to obtain the fabric of Figure 5a;
• Figure 6 shows the fabric of Figure 5a seen in profile;
• Figure 7 shows a preferred armor for making flat portions such as hems, weft direction;
• Figure 8a shows a fabric according to the invention wherein elastic threads are inserted among the bottom warp threads;
• Figure 8b shows an armor for obtaining the fabric of Figure 8a;
• Figure 9a shows a fabric in which elastic yarns are inserted into the weft yarns and the bottom warp yarns; and
• Figure 9b shows an armor for obtaining Figure 9a.

Figure 2 schematically shows a loom for weaving an article of bathroom linen according to the invention. This is a classic job. Two beams 11 and 12 respectively supply the ground wire device 1 and the loop wire 2. The amount of material for weaving a sponge-like article differs between the ground wires and the loop wires. This is more commonly referred to as embossing.

The set of bottom and loop warp threads is controlled (raised or lowered) by group in the case of a dobby weaving of the order of 200 to 600 threads and individually (or in groups) in the case of a jacquard fabric. The warp threads are introduced into the eyelets of the stitches, which are themselves integral with the straps and the battens 14 in the case of dobby or integral weaving of the arches manipulated by hooks in the case of a jacquard weave.

The action of raising or lowering, by group, the battens or the hooks cause the formation of the crowd 16 in which is inserted the weft thread 3. The opening of the crowd 16 is done by maintaining a constant voltage for all wires 1, 2 of the bottom chains and loops. Weft yarn 3 is dispensed by a donor who calls the yarn, stores it on a drum and distributes it at the desired time to the weft vector. The donor is more commonly referred to as a predeliver and its usefulness lies in the fact that it facilitates the scrolling at high speed while maintaining a regularity of output voltage.

The formation of the loop is preferentially carried out as follows, knowing that other ways of doing are obviously applicable to the present invention.

Between two consecutive weft yarn insertions 3, a comb 17, through the flapper 18 acts on the two weft yarns by positioning them at a distance from the fabric seam 19. Then, at the third inserted weft yarn, the comb 17 brings all of the three weft yarns against the cut 19 to thereby form the loop and thus the desired fabric. By way of non-limiting example, represented in FIG. 3a, the bottom and loop warp 1 and 2 threads thus interweave with the weft threads 3.

FIG. 3b specifies the armor used to obtain the interlacing of FIG. 3a and in FIG. 4 the profile resulting from the preceding figures can be seen. A loop 21 is visible at the place, while a loop 22 is visible on the back. The advancement of the comb is indicated by the arrow 25. As seen in FIG. 4, during the operation, the bottom warp threads 1 are braked by being very tight (see FIG. 4, thread 1 to left part of the drawing). This favors the sliding of the loop wires. This method of weaving weft yarn and loop comb is well known in the art.

According to the invention, son will also be inserted in an elastic material, based on a polythrephthalate, especially butylene (PBT).

According to another embodiment, it is also possible to use a trimethylene polytetrafhalate (PTT), or a mixture of both (PTT, PBT).

In FIG. 5a, there is the case where an extensibility effect has been sought in the weft direction. Elastic threads 4 were inserted during the sponge cycle. Depending on the elasticity and persistence desired for the article of bathroom linen, the proportion of elastic threads 4 inserted is controlled. At least one thread per sponge cycle will be inserted and at the most all the weft threads will be elastic threads, in which case the device shown in FIG. 2 will simply be resumed and only elastic weft threads will be fed.

FIG. 5b specifies the armor used to obtain the interlacing represented in FIG. 5a, in which an elastic thread is inserted every three threads, that is to say that there are two non-elastic threads for an elastic thread .

At the ends of the article of towels, in particular at the ends where the final hem is made (called flat transverse part), it is preferable to preserve a good balance of effecting an insertion on two weft threads. that is, to have an elastic weft yarn for a non-elastic weft yarn. For this flat transverse hem part, the specific armor shown in Figure 7 is particularly recommended. Namely, a non-elastic weft thread 3 is inserted for an elastic weft yarn 4 with the threads of the bottom and loop chains 1 and 2.

Similarly, to improve the visual appearance of the product, you can use this same armor for longitudinal flat parts, commonly called edges and which surround the product. In general, the amount of selvedge yarn is modified according to the stretch woven fabric article to enhance the feasibility of the hems in garment. However, in the case of a made-up sponge woven article, ie a product obtained after cutting into a fabric followed by fancy sewing, the "edge size" parameter is reduced strictly necessary. In addition, a "velvet" effect can be provided, that is to say that the head of the loops is shaved according to a known method. The shaved and extensible sponge woven article can be obtained in the weft direction and / or in the chains, that is to say with velvet effect on the spot and / or on the back.

Figure 6 shows the profile resulting from Figures 5a and 5b. It shows the visible buckle on the spot, 21, the buckle visible on the back, 22, the positioning of the bottom warp threads, the insertion of the elastic and non-elastic weft threads and the advancement of the comb (arrow 25).

Another embodiment of the invention is now described in which the extensible effect is sought in the warp direction, that is to say parallel to the bottom chain. One will thus integrate one or more son of elastic material, namely polybutylene terephthalate, in the composition of the beam 11 of the chain of ground wire. On the other hand, the loop warp threads are not concerned. Indeed, given the fact that the loops are woven by being released on the fabric, they can already, without being elastic material, achieve a significant race allowing extensibility in their direction. The elasticity is modulated at the support of the woven terry article. Thus, depending on the desired elasticity and persistence, provision is made for some proportion of elastane yarns in the bottom warp yarns. In general, this proportion will be between 10 and 80 to 90%. We could consider 100%. However, for reasons of cost, it is better to limit oneself to smaller proportions. Preferably, the proportions of elastic yarn are between 25 and 70%, for example between 30 and 50%.

As seen in FIG. 8a, the bottom or loop warp threads 1 and 2 intertwine with the non-elastic weft threads 3. The bottom warp threads consist of non-elastic threads 1 and elastic threads 1, the loop warp threads 2 being non-elastic. Figure 8b specifies the armor used to obtain the interlacing of Figure 8a.

FIGS. 9a and 9b show an embodiment in which the two embodiments described above are combined, namely that it is desired to obtain an extensible article in both the weft and the warp direction. Thus, the warp and loop warp threads intertwine with non-elastic weft threads 3 and elastic 3 'weft threads. Reference can be made to Figure 9a. The armor used is specified in Figure 9b. The non-elastic threads are for example cotton. These threads have no elastic property. Therefore, to be able to obtain the expansive character, in the weft direction in the case where elastic threads are inserted in the weft direction and in the bottom warp direction, when the elastic character is sought in the bottom warp direction, it is necessary to to provide a tension of the non-elastic son such that they can "follow" the deformations in extension and return to initial position (retraction) elastic son. In fact, if the non-elastic threads were completely stretched in the unstretched state of the elastic threads, they would prevent any stretching of the towel. Thus, the possible race in elasticity of the article of bathroom linen will be defined between the rest position of the non-elastic threads in which they are not drawn and which also corresponds to a position of the non-elastic threads parallel to the elastic threads in which they are substantially relaxed to a position in which the elastic threads are stretched, and this position corresponding to the case where the non-elastic son parallel to the elastic son are completely stretched. The elastic threads could be stretched further, but this is not possible because they are then prevented by the inelastic threads stretched completely.

By way of example, an acceptable stroke for an article of bathroom linen according to the invention corresponds to a stretching of the product in the sense that it can be stretched between 10 to 70%, preferably between 30 and 60% of its weight. length at rest.

Claims (9)

An article of woven toweling with sponge yarns for interlacing weft yarns and warp yarns and loop warp yarns, at least one weft yarn and / or bottom warp yarn interlacing being of an elastic material, while the other non-elastic material yarns parallel to said at least one elastic yarn are formed to allow stretching of the article in the direction of the elastic yarns from the unstretched position of the elastic yarns , is characterized in that said elastic material comprises a polytephthalate or a mixture of polyterephthalates. Article according to Claim 1, characterized in that the polytephthalate is PTT. Article according to Claim 1 or 2, characterized in that weft yarns are made of elastic material if the extensibility of the article is sought in the weft direction, and / or bottom warp threads are made of elastic material if extensibility of the article is sought in the warp direction, and / or weft son and bottom warp son are elastic material if extensibility is sought in both directions. An article according to claim 1, 2 or 3, characterized in that 10 to 80 or 90% of the weft threads are of elastic material, especially 25 to 75%, for example 33% (1 of 3). An article according to claim 1, 2, 3 or 4, characterized in that 10 to 80 or 90% of the warp yarns are of elastic material, preferably 25 to 75%, for example 33% (1 of 3) . Article according to one of claims 1 to 5, characterized in that the loop threads are all non-elastic material. Article according to one of the preceding claims, characterized in that the loops are shaved to obtain a velvet effect. Article according to one of the preceding claims, characterized in that the weft threads cross the threads of the bottom chain and the loop chain perpendicularly. An article of woven toweling with sponge yarns for interlacing weft yarns and warp yarns and loop warp yarns, at least one weft yarn and / or bottom warp yarn interlacing being of an elastic material, while the other non-elastic material yarns parallel to said at least one elastic yarn are formed to allow stretching of the article in the direction of the elastic yarns from the unstretched position of the elastic yarns , is characterized in that said elastic material comprises PBT.

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