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  Textile based on a mixture of abrasion resistant technical fibersUSPTO Application #: 20070249250Title: Textile based on a mixture of abrasion resistant technical fibers Abstract: The invention concerns a single-layer fabric comprising two yarns, a so-called comfort cellulosic material yarn and a technical yarn with high abrasion and temperature resistance properties, said two yarns being woven or knitted so as to define at least two separate portions in the thickness of the fabric, a first outside portion, with a majority of technical yarn, and a second inside portion, with a majority of comfort yarn, said portions being at least partly entangled. The invention is characterized in that the technical yarn, produced from continuous filaments, whereof the web is coated over at least 75% of its surface with a coating comprising at least partly natural fibers. (end of abstract) Agent: Cantor Colburn, LLP - Bloomfield, CT, US Inventor: Pierre Henry Servajean USPTO Applicaton #: 20070249250 - Class: 442184000 (USPTO) Related Patent Categories: Fabric (woven, Knitted, Or Nonwoven Textile Or Cloth, Etc.), Woven Fabric (i.e., Woven Strand Or Strip Material), Woven Fabric Has An Elastic Quality, Including Elastic Strand Or Strip The Patent Description & Claims data below is from USPTO Patent Application 20070249250. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] The present invention relates to a textile based on an abrasion-resistant mixture of cellulose fibers, for example cotton fibers, and technical fibers. [0002] More particularly, the subject matter of the invention is a fabric with the appearance of jeans or more generally having the appearance of cotton cloth which is intended for the manufacture of pants, jackets, including bomber jackets, gloves, and the like. DESCRIPTION OF THE PRIOR ART [0003] Fabrics having qualities during abrasive impacts, for example the impacts experienced by the clothing of a motorcyclist when he falls off, are known in the prior art. These fabrics generally require a minimum of two separate layers: either a comfort lining is positioned, to make it possible to wear next to the skin, or a coating of products with a low coefficient of friction (silicone, polytetrafluoroethylene (PTFE), and the like) is produced on a resistant material (mesh or fabric made of aramids, and the like); this is the case of work gloves intended for protecting against abrasive impacts. However, the latter solution exhibits two major disadvantages: the discomfort due to the lack of breathability of the complex because of the coating and the "industrial" appearance given by the coating. In addition, these are fabrics which allow only slight aeration in summer and thus they are rather unpleasant to wear during this season. [0004] The great majority of the other alternatives known in the prior art are polyamides which melt at a temperature of less than 250.degree. C. Moreover, the latter are not self-extinguishing, which represents an obvious additional danger for the wearer of clothing produced with such textiles. This is because, during an abrasive impact, for example on a motorbike, such materials can rapidly locally reach their melting point and are then in direct contact with the skin of the user, then bringing about lesions and burns which are difficult to treat (the risk of complications is increased in the event of fire). [0005] Polyesters have a degree of resistance to abrasion but do not have satisfactory fire-resistant qualities. Polyethylene has very good mechanical qualities but its melting point lies in the vicinity of 120.degree. C. Only para- and meta-aramids have mechanical and fire-resistant qualities but their performances deteriorate in the presence of UV radiation. Ceramics might combine these qualities but their cost is still too high to allow economically viable industrial operation. [0006] In any case, none of these materials has satisfactory textile qualities; they are difficult to dye and have an unpleasant feel for the wearer of the clothing, which corresponds to the feeling of contact of plastic with the skin. [0007] Thus, in the world of equipment for the motorcyclist in general and with regard to pants in particular, only overpants, pants made of multilayer fabric or pants made of leather can be taken advantage of in providing protection from abrasion. Respective disadvantages exist in each of these cases, in particular in summer (discomfort, lack of breathability and of hydrophilicity, poor appearance, and the like). [0008] Finally, U.S. Pat. No. 4,920,000 discloses a monolayer fabric comprising two yarns, a natural "comfort" yarn and a "technical" yarn possessing good properties of resistance to abrasion and to temperature, these two yarns being woven in a weave defining at least two separate portions in the thickness of the fabric, a first outer portion predominantly of technical yarn and a second inner portion predominantly of comfort yarn, said portions being at least partially entangled. The technical yarn used in the invention disclosed in this patent is an intimate mixture of different natural and artificial materials, each having a specific technical role, the periphery of the yarn being of the same composition as the center of the yarn. The technical yarn thus obtained is only very partially covered at the surface and the part of this yarn made of synthetic material is highly exposed, which does not make it possible to overcome the disadvantages of the textiles based on artificial yarns described above, in particular with regard to the visual appearance and the comfort. In addition, such a technical yarn does not make it possible to color the fabric obtained as either the colorants are very poorly retained by the synthetic materials used for the technical fibers or use is made of polyester and polyamide, which dye well but for which the feel and the gloss present problems with regard to the look of the fabric obtained and with regard to the technical performances, which are poorer. SUMMARY OF THE INVENTION [0009] Thus, the main aim of the present invention is to provide a fabric which makes it possible to reduce the difference in performances between technical textiles and textiles intended for clothing. More specifically, the aim of the invention is to provide a fabric which makes it possible to solve the technical problems of the fabrics known in the prior art and thus has excellent mechanical properties, in particular of resistance to fire, to high temperatures and to abrasion, which makes possible a hold of the colorants which are applied thereto at a level at least equal to that possessed by fabrics made of natural material, for example cellulose (cotton or flax in particular), and which are as comfortable to wear as these fabrics. [0010] The aim of the invention is achieved with a monolayer fabric comprising two yarns, a "comfort" yarn made of cellulose material and a technical yarn possessing good properties of resistance to abrasion and to temperature, these two yarns being woven or knitted so as to define at least two separate portions in the thickness of the fabric, a first outer portion predominantly of technical yarn and a second inner portion predominantly of comfort yarn, said portions being at least partially entangled. [0011] The invention is more particularly wherein the technical yarn is a yarn produced from continuous and preferably nontextured filaments, the core of the technical yarn being covered over at least 75%, preferably at least 85%, of its surface by a coating at least partially comprising natural fibers. [0012] This fabric has excellent mechanical qualities and textile qualities (in terms of ease of weaving, on the one hand, and of comfort, on the other hand) and it is intended in particular for motorcyclists or users of skateboards, roller skates, bicycles or snowboards, providing them with protection, comfort and a stylish appearance. [0013] Due to its monolayer design, it is intended for the manufacture of light clothing which can be worn next to the skin and which offers excellent protection from abrasion in the event of falls. Protection is provided by the extreme resistance to abrasion of the technical yarn, which is present predominantly in the outer portion of the fabric. [0014] It should be noted here that the term "abrasion-resistant material" is understood to mean a material having a hardness and a coefficient of friction such that they allow it to be virtually equivalent, during tests of resistance to abrasion under actual conditions, to competition-grade leathers approved by the Federation Franccaise de Motocyclisme [French Motorcycling Federation], according to Standard No. prEN 13595-2. [0015] Thus, tests performed on various samples of textiles have shown the results described below. The method used is not exactly the standardized method but it approaches it in the stages involved and in its reproducibility. [0016] Samples with an area of 80 mm by 50 mm, placed under a weighted support of approximately 10 kg which is brought into direct contact with a dry road surface with a moderate size grading, were tested at 37.degree. C. The weighted support is moved translationally until all the warp yarns had been completely torn. The measurements given below represent the distances covered by each sample before complete destruction of the warp yarns: [0017] fabric of France (standard according to Standard EN388 of 1993 from the IFTH, under the reference LEM 6), 100% cotton: 25 m [0018] jeans of new "Levis 501.TM." type, 100% cotton: 12 m [0019] jeans of old "Levis 501.TM." type, 100% cotton: 2.5 m [0020] jeans comprising warp and weft yarns reinforced with polyester and Kevlar.TM., as an intimate mixture: 15 m [0021] competition-grade leather: 62.5 m [0022] textile according to the invention, composed of a weft made of cotton and of a warp of twisted cotton/aramid filaments: 29.5 m [0023] textile according to the invention as described in the example below, composed of a weft made of cotton and of a warp of continuous aramid filaments covered with blue cotton: 45 m [0024] textile according to the invention, composed of a weft made of cotton and of a warp of cotton-covered polyethylene filaments: 65 m. [0025] It is thus noted that the textiles obtained according to the invention, although they make it possible to retain the external appearance of a 100% cotton fabric, demonstrate much better performances than those of the 100% cotton fabrics of jeans type and, in some cases, performances virtually identical to those obtained with leathers used competitively by the Federation Francaise de Motocyclisme. [0026] The comfort arises from a special construction of "warp effect" type; the warp effect can be obtained by the counts of the yarns employed (for example, thicker in warp than in weft) or else by the weave itself (satins, twills, half plaits, and the like), making it possible to combine the above qualities with a single layer of fabric which protects by virtue of its outer surface and is worn next to the skin by virtue of its hydrophilic inner surface. This fabric also has high-level thermal qualities. DESCRIPTION OF THE PREFERRED EMBODIMENT [0027] According to a first preferred embodiment of the invention, the fabric is obtained by weaving, the weft yarn constituting the comfort yarn and the warp yarn constituting the technical yarn. [0028] In this case, the weave used is of warp effect type but having floats of less than or equal to 4 yarns, preferably a 3/1 twill (float of 3) or 2/1 twill (float of 2). Continue reading... Full patent description for Textile based on a mixture of abrasion resistant technical fibers Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Textile based on a mixture of abrasion resistant technical fibers patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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