EP0692040B1 - Textured synthetic yarn and fabric surfaces containing same - Google Patents

Textured synthetic yarn and fabric surfaces containing same Download PDF

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Publication number
EP0692040B1
EP0692040B1 EP94912573A EP94912573A EP0692040B1 EP 0692040 B1 EP0692040 B1 EP 0692040B1 EP 94912573 A EP94912573 A EP 94912573A EP 94912573 A EP94912573 A EP 94912573A EP 0692040 B1 EP0692040 B1 EP 0692040B1
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EP
European Patent Office
Prior art keywords
yarn
yarn according
carbon atoms
unit
texturing
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EP94912573A
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German (de)
French (fr)
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EP0692040A1 (en
Inventor
Pascal Barthelemy
Jean Coquard
Francis Rattaggi
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Nylstar SA France
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Nylstar SA France
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/86—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyetheresters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/82—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyester amides or polyether amides
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/0213—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting after drawing the yarn on the same machine

Definitions

  • the invention relates to synthetic yarns and textile surfaces soft touch close to natural materials obtained by weaving, knitting, these sons.
  • textured yarns obtained by texturing of yarns based on copolymers comprising patterns with a characteristic thermoplastic and elastomeric patterns, and to textile surfaces obtained in particular by knitting, weaving at least these textured yarns, having an appearance and a touch new, close to natural materials.
  • the spinning conditions described are very far from the conditions current and industrial spinning.
  • the spinning speed described is 70 m / minute, while the minimum spinning speeds currently used on a farm industrial speeds are at least 2000 m / minute. These spinning conditions have an influence important on the properties and structure of the filament.
  • polyetherester copolymers obtained from a diacid such as terephthalic and / or isophthalic acids, a diol such as ethylene glycol and / or butanediol, and a polyalkylene ether glycol.
  • a diacid such as terephthalic and / or isophthalic acids
  • a diol such as ethylene glycol and / or butanediol
  • polyalkylene ether glycol such as ethylene glycol and / or butanediol
  • Such polymers are especially described in French patents No. 2218354 and 2233369. These polymers are used for the production of molded parts.
  • WO-A-8904885 describes a process for texturing an elastic thread and the wire obtained.
  • the wire has a low remaining elongation and does not allow make textile surfaces with a feel close to that of natural fibers.
  • One of the aims of the present invention is to provide textured yarns allowing the design of a textile surface with a particular appearance and feel, closer to that of natural materials.
  • the invention provides a textured yarn of synthetic material characterized in that it is obtained by texturing a flat wire produced from a composition comprising at least one copolymer consisting of at least one motif with character elastomer and at least one pattern of thermoplastic nature, the percentage by weight of elastomeric pattern being between 10 and 40%, that in thermoplastic pattern being between 90 and 60%, and in that it has a ratio between its maximum diameter apparent and its apparent mean diameter between 1 and 2.5, preferably less to 2.
  • this thread is obtained by texturing a flat wire of amorphous structure, the crystallization of the synthetic material being provoked by the stretch applied to it in the texturing process.
  • amorphous structure it it should be understood that the synthetic material, more particularly the copolymer, is very mainly in an amorphous form, that is to say that the crystalline phase represents a weight percentage at most equal to 5% of the mass of synthetic material.
  • the flat wire is obtained by spinning the synthetic material at a speed sufficient, and if necessary with subsequent drawing to obtain an amorphous or having a thread a low degree of crystallinity (less than 5%), with a high orientation.
  • the spinning speeds can be between 1000 m / min. and 5000 m / min.
  • the subsequent drawing can be cold or hot drawing, integrated into the spinning process or not.
  • the percentage by weight of elastomeric pattern is advantageously between 15 and 30%, that in pattern thermoplastic being advantageously between 85 and 70%.
  • the texturing of the yarn can be carried out by implementing a process of any texturing consisting in subjecting the thread to a twist on itself by application of a torsional force.
  • the conditions of the texturing process are determined according to usual techniques, depending on the method and the material used for the implementation thereof. After undergoing this twist, the stresses are removed and the wire retains a permanent deformation which forms a crimp. So, the textured thread can be obtained by a so-called "Brochette” texturing or by friction by use of friction discs, for example ceramic, texturing process called "False Twist".
  • the yarn thus obtained can be used for the manufacture of textile surfaces as for example, for the manufacture of textile surfaces by conventional methods such as whether flocking, weaving, or knitting.
  • the thread of the invention can be used as a weft thread for producing a surface by weaving, the other threads chain which may be a conventional polyamide or polyester thread or for the production of knitted textile surfaces, in particular for making stockings and tights.
  • the wire is obtained by spinning a composition comprising a copolymer as defined above.
  • This composition may also include additives, fillers or other polymers used in a manner classic in the field of wire manufacturing.
  • the nature of the additives is determined in depending on the end use of the wire. Thus, they can be, for example, additives of thermal stability, light, matifiers or the like.
  • the pattern of thermoplastic nature of the polymer has, for formula, at least one of the general formulas (I), (I ') or (II) [-CO- R 1 - CO - NH - R 2 - NH-] [-CO - R 1 - NH] [-CO - R3 - CO - O - R 4 - O-] in which : R 1 , R 2 , R 3 and R 4 , which are identical or different, represent hydrocarbon groups comprising from 2 to 18 carbon atoms.
  • R 1 , R 2 represent linear or branched aliphatic hydrocarbon groups comprising from 4 to 12 carbon atoms, R 1 advantageously representing a polymethylene group comprising 2, 3, 4, 5, 9, 10 or 11 carbon atoms and R 2 advantageously representing a polymethylene group comprising 5, 6, 10 or 11 carbon atoms.
  • copolymer suitable for the invention can comprise several different units conforming either to formula (I), and / or to formula (I '), and / or to the formula (II).
  • thermoplastic patterns corresponding to formulas (I), and / or (I ′) are advantageously the units corresponding to the polyamides PA 4, PA 6, PA 10, PA 11, PA 12, PA 6.6, PA 4.6, PA 10.6.
  • R 3 represents a phenylene radical comprising free bonds in the para or meta position
  • R 4 representing a polymethylene radical comprising from 2 to 6 carbon atoms.
  • the units of formula II are generally the units of the polyesters used in the manufacture of wire, fiber or film such as polypropylene glycol terephthalate, polyethylene terephthalate, polytetramethylene glycol terephthalate or similar.
  • R 5 comprises in the preferred embodiments of the invention a number of carbon equal to 2, 3 or 4 carbon atoms.
  • the molar mass of the patterns of formula (III) is between 250 and 3000, preferably between 400 and 2000.
  • copolymers suitable for the invention may be called polyetheramides or polyetheresteramides when they include units of formulas (I), and / or (I ') and (III), and polyetheresters when they include units of formulas (II) and (III).
  • copolymers can be obtained by reaction between an oligomer or a prepolymer with acid endings, comprising units of formulas (I), and / or (I ') or (II) and acid terminations, with a polyoxyalkylene diamine or its salt or a polyoxyalkylene diol or its ester comprising units of formula (III).
  • the oligomers or prepolymers are obtained according to conventional methods for manufacturing polyamides or polyesters with control of the degree of progress of the polymerization to obtain an oligomer or prepolymer of desired molecular weight, and an excess of the acid monomer to obtain acid terminations. This excess of acid monomers can be advantageously replaced by adding a different diacid of said monomer.
  • oligomers or prepolymers preferably have a molecular weight between 300 and 15,000.
  • polyoxyalkylene diamines or their salts or polyoxyalkylene diols or their esters comprising units of formula (III) are mixed with the corresponding monomers on the grounds of general formulas (I), (I ') or (II).
  • polyoxyalkylene diamines suitable for the invention are by example, the compounds marketed under the trade name "JEFFAMINE" by the Texaco company.
  • the copolymers obtained advantageously have a viscosity sufficient, for example greater than 50 Pa ⁇ s (500 poises) at the spinning temperature, to allow spinning in a molten environment, at relatively high speeds, for example greater than 1000 m / min, advantageously between 2000m / min. and 5000 m / min.
  • the spinning of these polymers can be carried out according to the known techniques of spinning of polyamide or polyester filaments, namely the polymer comprising additives or not is melted, spun through a die comprising a plurality of holes section determined according to the shape of the section of the filament to be produced.
  • the filaments thus obtained are cooled and gathered in one or several bundles comprising a determined number of filaments to produce threads.
  • the son thus obtained are returned on a reel. These operations can be carried out in a single step or in several steps. In addition, different sizes, such that lubricating sizes can be deposited on the wire or filaments so known per se.
  • the wires undergo a first stretch under the die before being gathered in beam. They can be directly rewound on a reel, the stretching rate then being equal to the ratio of the speed of the winding reel to that of the polymer flow in the industry. In another method of manufacturing the wires, these are subjected to additional draws after being assembled, for example on draw benches, the drawing rate then being the sum of the drawing rates applied over the one hand before the gathering of filaments in bundles and on the other hand after this gathering.
  • the stretching on the wire after gathering can be carried out, cold or hot, before rewinding or after it.
  • the spinning speed and any stretching are determined to apply an overall draw rate to the non-generating wire or a very low crystallization of the synthetic material.
  • the yarns of the invention are subjected to a texturing process for their give a bulge or increase their apparent volume and elasticity.
  • the conditions for implementing texturing are determined according to the nature of the copolymer, method and material used according to techniques known to man of the trade, to obtain an optimal texturing with a minimum of breaks and a maximum stability.
  • the wire must undergo stretching during texturing to cause crystallization of the copolymer constituting the material synthetic. This stretching depends on the nature of the copolymer and the conditions used for obtaining flat wire in the spinning and drawing processes.
  • a lubricating oil is deposited on the wire at a weight rate advantageously greater than 5%, during the texturing process.
  • the textured yarns according to the invention advantageously comprise at least 5% by weight of size.
  • These textured threads are particularly useful for the realization of surfaces textiles, for example, by knitting or weaving.
  • These wires can be used alone or in combination association with synthetic textile yarns such as polyamide yarn, polyester yarn, acrylic yarn, PVC yarn, artificial viscose yarn or the like, yarns of natural material such as than cotton, linen or the like.
  • wires providing special characteristic on the textile surface, such as electrically conductive threads like carbon threads, metal threads, elastic threads like spandex threads.
  • Another object of the invention are textile surfaces comprising threads according to the present invention which are characterized by a particular feel different from that obtained with known synthetic or artificial yarns. This touch is similar to that of natural materials such as silk, for example. This has notably was observed for textile surfaces obtained by weaving with a warp thread in polyamide and a copolymer weft yarn according to the present invention, in particular with threads having a strand count greater than 2 dtex.
  • Textile surfaces obtained with textured yarns according to the invention have different thermal and surface properties than textile surfaces obtained with known synthetic yarns such as polyamide yarns, polyester yarns. These properties were determined using the Kawabata Rating System, also called KES-F and described in the reference “Objective Specification of Fabric Quality, Mechanical Properties and Performance "by Kawabata et al. Published in” The Textile Machinery Society of Japan, Osaka, 1982.
  • dyed textile surfaces in accordance with the invention obtained in particular by knitting textured yarns with a 22dTex 7-strand count (22/7) have an effusivity greater than 0.1 J / cm 2 / s, a heat resistivity greater than 25 J / cm 2 / s. These thermal properties are high compared to the values obtained for knitted textile surfaces dyed with conventional polymer yarns.
  • the knitted textile surfaces above have a coefficient of friction greater than 0.5, preferably greater than 0.6. This coefficient of friction is measured by the Kawabata system precipitated on a stretched surface.
  • the surfaces knitted textiles obtained with the textured yarns of the invention have regularity in the remarkable mesh size which cannot be obtained with textured threads thermoplastic polymers. This regularity results in populations of meshes having substantially constant head and foot wing dimensions.
  • population mesh means the mesh obtained with identical son and according to a method of identical knitting.
  • This polymer comprises units of formula (IV) - [- CO - (CH 2 ) 4 - NH -] - and units of formula (V)
  • This copolymer is obtained by addition to a 201.2 part reactor in weight of caprolactam with 72.980 parts by weight of a polyoxypropylene diamine marketed by Texaco under the name "JEFFAMINE D-2000", 2,687 parts by weight of adipic acid and as a catalyst for phosphorous acid.
  • a thermal stabilizer such as the compound is also added marketed by Ciba-Geigy under the name IRGANOX 1010, in a proportion of 1.25 parts by weight.
  • This reaction mass is kept under the sweeping of an inert gas such as than nitrogen, and heated to a temperature of 148 ° C under an autogenous pressure of 400 KPa.
  • an inert gas such as than nitrogen
  • the mixture After reducing the pressure to a value close to the pressure atmospheric, the mixture is maintained for 1 hour at 260 ° C, then for 40 minutes under reduced pressure at the same temperature to obtain a degree of polymerization determined. This degree of polymerization is controlled by measuring the viscosity of the reaction mass.
  • the copolymer thus obtained is poured then granulated and washed with water and finally dried.
  • the copolymer obtained has a melting temperature of 219 ° C, a crystallization temperature of 150 ° C, and a viscosity measured on a 0.5% solution in meta-cresol at 25 ° C of 103 ml / g.
  • the copolymer comprises a concentration by weight of elastomeric unit of formula (V) equal to 30%.
  • the copolymer is melted at a temperature of the order of 260 ° C. and then injected in a die comprising 2x7 holes with a diameter of 0.34 mm, at a pressure of 8 MPa at 10 MPa and a die temperature of 260 ° C.
  • the filaments after gathering in bundles for the formation of 7 strands, cooling and depositing of a lubricating size are wound on a reel at a speed of the order of 3100 m / min. with low voltage rewinding.
  • drawing rate is meant the ratio between the speed of winding a wire and the flow rate of the molten polymer through the orifices of the extrusion die.
  • This draw rate is the overall draw rate of the yarn before texturing, i.e. it includes on the one hand, the drawing undergone by the wire leaving the die during its solidification, and on the other hand, the subsequent drawing (s) applied to the solidified wire. These subsequent stretchings can be carried out cold or hot, directly at the outlet of the die, as in the processes with integrated drawing, or after a first winding of the wire.
  • wires obtained have the characteristics gathered in the attached table: Wire Polymer Young CN / Tex module Tenacity cN / Tex elongation% Headline dTex A1 AT 75 18.5 66.7 28.1 B1 B 64 23.1 110 28.6 C1 VS 34 16.5 138 27.3
  • Textured yarns have the following characteristics: Wire Polymer Constraint cN / Tex Tenacity cN / Tex elongation % Headline dTex A1 AT 26 20.2 29 24.9 B1 B 46.5 27.3 70 24 C1 VS 37.6 21.1 77.7 22
  • a textured yarn according to the invention apparently has a substantially constant diameter over its entire length. This feature can be quantified by the ratio between the maximum diameter D of the wire and the apparent average diameter d apparent.
  • maximum diameter D is meant the diameter of a cylindrical envelope in which the whole of the wire would be circumscribed, loops included.
  • d is meant the diameter of a cylindrical envelope in which the whole of the wire would be circumscribed, loops excluded.
  • this ratio is less than 2.
  • Figure 3 illustrates the texture of a textured yarn obtained from Polyamide 6.6. The difference in texture between this yarn and the yarns of the invention is obvious. For this thread base of PA 6.6 the ratio of diameters D / d is close to 4.
  • Textile surfaces were produced by knitting these textured yarns according to a conventional knitting process for the production of stockings or tights, i.e. a circular knitting with JERSEY weave / 400 needles on a MATEC HS loom from four falls (2 tors S / 2 tors Z).
  • the surfaces thus obtained were dyed and treated according to techniques usual dyeing and treatment such as softening knitwear for stockings and tights.
  • Figures 4 and 5 The structures of the knits obtained with the textured yarns A1 and respectively C1 are illustrated in Figures 4 and 5.
  • Figure 6 illustrates, for comparison, the structure of a knit obtained according to the same knitting process with textured yarns in PA6.6.
  • the stitches of the knit according to the invention have a regularity remarkable dimensional.
  • the dimension of the wings, foot and head of the meshes is substantially constant over the entire surface of the knitted fabric, in the illustrated case.
  • a knitted surface can include several types of stitches or stitches with different dimensions because the knitting conditions were modified thus forming several population of meshes.
  • each population of stitches of a knitted surface has a dimension of regular and constant mesh.
  • the stockings produced were also tested by a sample of 35 people to carry out a test to wear and appreciate the characteristics of this new textile surface.
  • the textile surfaces have also been tested according to the KES-F system of Kawabata.
  • the measurements carried out made it possible to evaluate the thermal properties, and to knitting surface.
  • the position "to wear” means that the knit is stretched matching that of an actual wearer, while the "cloth” position means that a slight tension is applied to the knit, only to maintain it.
  • the resistivity in J / cm 2 / s is measured under 25 cm 2 and a temperature difference of 10 ° C

Description

L'invention concerne des fils en matière synthétique et des surfaces textiles à toucher doux voisin des matières naturelles obtenues par notamment tissage, tricotage de ces fils.The invention relates to synthetic yarns and textile surfaces soft touch close to natural materials obtained by weaving, knitting, these sons.

Elle se rapporte plus particulièrement à des fils texturés obtenus par texturation de fils à base de copolymères comprenant des motifs à caractère thermoplastique et des motifs à caractère élastomère, et à des surfaces textiles obtenues notamment par tricotage, tissage d'au moins ces fils texturés, présentant un aspect et un toucher nouveau, voisin des matières naturelles.It relates more particularly to textured yarns obtained by texturing of yarns based on copolymers comprising patterns with a characteristic thermoplastic and elastomeric patterns, and to textile surfaces obtained in particular by knitting, weaving at least these textured yarns, having an appearance and a touch new, close to natural materials.

On connaít, notamment par les brevets français n° 2270021 et 2378058 des copolymères séquencés polyétheresteramides obtenus par réaction d'un oligomère polyamide à terminaisons acides avec un polyétherdiol. Des procédés de préparation de ces polymères sont également décrits dans les brevets français 2410947, 2413417 et 2447941.We know, especially by French patents No. 2270021 and 2378058 polyetheresteramide block copolymers obtained by reaction of an oligomer acid-terminated polyamide with a polyetherdiol. Processes for preparing these polymers are also described in French patents 2410947, 2413417 and 2447941.

Il a également été décrit dans le brevet français n° 2368516 des compositions ou poudres à mouler à base de polyétheramide obtenu par action d'un oligomère polyamide à terminaisons acides avec un polyoxyalkylène diamine.It has also been described in French patent n ° 2368516 of molding compositions or powders based on polyetheramide obtained by the action of a polyamide oligomer with acid endings with a polyoxyalkylene diamine.

Par les brevets français n° 2328060 et 2364982, il est également connu l'utilisation des copolyétheresteramides tels que décrits ci-dessus pour l'obtention de fils ou filaments par filage en milieu fondu et étirage des fils et filaments ainsi obtenus. Ces fils ou filaments présentent des propriétés antistatiques.By French patents n ° 2328060 and 2364982, it is also known the use of copolyetheresteramides as described above for obtaining yarns or filaments by spinning in a molten medium and drawing of the threads and filaments thus obtained. These sons or filaments have antistatic properties.

Toutefois, les conditions de filage décrites sont très éloignées des conditions actuelles et industrielles de filage. Ainsi, la vitesse de filage décrite est de 70 m/minute, tandis que les vitesses de filage minimale utilisées actuellement dans une exploitation industrielle sont d'au moins 2000 m/minute. Ces conditions de filage ont une influence importante sur les propriétés et la structure du filament.However, the spinning conditions described are very far from the conditions current and industrial spinning. Thus, the spinning speed described is 70 m / minute, while the minimum spinning speeds currently used on a farm industrial speeds are at least 2000 m / minute. These spinning conditions have an influence important on the properties and structure of the filament.

On connaít également des copolymères polyétherester obtenus à partir d'un diacide tel que les acides téréphtaliques et/ou isophtaliques , un diol tel que l'éthylène glycol et/ou le butanediol, et un polyalkylèneéther glycol . De tels polymères sont notamment décrits dans les brevets français n° 2218354 et 2233369. Ces polymères sont utilisés pour la réalisation de pièces moulées.There are also known polyetherester copolymers obtained from a diacid such as terephthalic and / or isophthalic acids, a diol such as ethylene glycol and / or butanediol, and a polyalkylene ether glycol. Such polymers are especially described in French patents No. 2218354 and 2233369. These polymers are used for the production of molded parts.

Le brevet WO-A-8904885 décrit un procédé de texturation d'un fil élastique et le fil obtenu. Toutefois, le fil présente un allongement restant faible et ne permet pas de réaliser des surfaces textiles avec un toucher se rapprochant de celui des fibres naturellles.WO-A-8904885 describes a process for texturing an elastic thread and the wire obtained. However, the wire has a low remaining elongation and does not allow make textile surfaces with a feel close to that of natural fibers.

Un des buts de la présente invention est de proposer des fils texturés permettant la conception de surface textile ayant un aspect et un toucher particulier, se rapprochant de celui des matières naturelles. One of the aims of the present invention is to provide textured yarns allowing the design of a textile surface with a particular appearance and feel, closer to that of natural materials.

A cet effet, l'invention propose un fil texturé en matière synthétique caractérisé en ce qu'il est obtenu par texturation d'un fil plat réalisé à partir d'une composition comprenant au moins un copolymère constitué d'au moins un motif à caractère élastomère et d'au moins un motif à caractère thermoplastique, le pourcentage en poids de motif élastomère étant compris entre 10 et 40 %, celui en motif thermoplastique étant compris entre 90 et 60 %, et en ce qu'il présente un rapport entre son diamètre maximum apparent et son diamètre moyen apparent compris entre 1 et 2,5, de préférence inférieur à 2.To this end, the invention provides a textured yarn of synthetic material characterized in that it is obtained by texturing a flat wire produced from a composition comprising at least one copolymer consisting of at least one motif with character elastomer and at least one pattern of thermoplastic nature, the percentage by weight of elastomeric pattern being between 10 and 40%, that in thermoplastic pattern being between 90 and 60%, and in that it has a ratio between its maximum diameter apparent and its apparent mean diameter between 1 and 2.5, preferably less to 2.

Selon une caractéristique de l'invention, ce fil est obtenu par texturation d'un fil plat de structure amorphe , la cristallisation de la matière synthétique étant provoquée par l'étirage appliqué à celui-ci dans le procédé de texturation. Par structure amorphe, il faut comprendre que la matière synthétique, plus particulièrement le copolymère, est très majoritairement sous une forme amorphe c'est à dire que la phase cristalline représente un pourcentage pondéral au plus égale à 5 % de la masse de matière synthétique.According to a characteristic of the invention, this thread is obtained by texturing a flat wire of amorphous structure, the crystallization of the synthetic material being provoked by the stretch applied to it in the texturing process. By amorphous structure, it it should be understood that the synthetic material, more particularly the copolymer, is very mainly in an amorphous form, that is to say that the crystalline phase represents a weight percentage at most equal to 5% of the mass of synthetic material.

Le fil plat est obtenu par filage de la matière synthétique à une vitesse suffisante, et si nécessaire avec un étirage subséquent pour obtenir un fil amorphe ou ayant un degré de cristallinité faible (inférieur à 5%), avec une orientation élevée.The flat wire is obtained by spinning the synthetic material at a speed sufficient, and if necessary with subsequent drawing to obtain an amorphous or having a thread a low degree of crystallinity (less than 5%), with a high orientation.

Les vitesses de filage peuvent être comprises entre 1000 m/min. et 5000 m/min. L'étirage subséquent peut être un étirage à froid ou à chaud, intégré au procédé de filage ou non.The spinning speeds can be between 1000 m / min. and 5000 m / min. The subsequent drawing can be cold or hot drawing, integrated into the spinning process or not.

Selon une autre caractéristique de l'invention, Le pourcentage en poids de motif élastomère est avantageusement compris entre 15 et 30 %, celui en motif thermoplastique étant avantageusement compris entre 85 et 70 %.According to another characteristic of the invention, the percentage by weight of elastomeric pattern is advantageously between 15 and 30%, that in pattern thermoplastic being advantageously between 85 and 70%.

La texturation du fil peut être réalisée par mise en oeuvre d'un procédé de texturation quelconque consistant à soumettre le fil à une torsion sur lui-même par application d'une force de torsion. Les conditions du procédé de texturation sont déterminées selon les techniques habituelles, en fonction de la méthode et du matériel utilisés pour la mise en oeuvre de celui-ci. Après avoir subi cette torsion, les contraintes sont supprimées et le fil conserve une déformation permanente qui forme une frisure. Ainsi, le fil texturé peut être obtenu par une texturation dit "Brochette" ou par friction par utilisation de disques de friction, par exemple en céramique, procédé de texturation appelé "Fausse Torsion".The texturing of the yarn can be carried out by implementing a process of any texturing consisting in subjecting the thread to a twist on itself by application of a torsional force. The conditions of the texturing process are determined according to usual techniques, depending on the method and the material used for the implementation thereof. After undergoing this twist, the stresses are removed and the wire retains a permanent deformation which forms a crimp. So, the textured thread can be obtained by a so-called "Brochette" texturing or by friction by use of friction discs, for example ceramic, texturing process called "False Twist".

Le fil ainsi obtenu peut être utilisé pour la fabrication de surfaces textiles comme par exemple, pour la fabrication de surfaces textiles par les procédés classiques tels que flocage, tissage, ou tricotage. Ainsi, à titre d'exemple, le fil de l'invention peut être utilisé comme fil de trame pour la réalisation d'une surface par tissage, les autres fils de chaíne pouvant être un fil polyamide ou polyester classique ou pour la réalisation de surfaces textiles tricotées notamment pour la confection de bas et collants. The yarn thus obtained can be used for the manufacture of textile surfaces as for example, for the manufacture of textile surfaces by conventional methods such as whether flocking, weaving, or knitting. Thus, by way of example, the thread of the invention can be used as a weft thread for producing a surface by weaving, the other threads chain which may be a conventional polyamide or polyester thread or for the production of knitted textile surfaces, in particular for making stockings and tights.

Selon une caractéristique de l'invention, le fil est obtenu par filage d'une composition comprenant un copolymère tel que défini précédemment. Cette composition peut également comprendre des additifs, charges ou autres polymères utilisés de manière classique dans le domaine de la fabrication de fils. La nature des additifs est déterminée en fonction de l'utilisation finale du fil. Ainsi, ils peuvent être, à titre d'exemple, des additifs de stabilité thermique, lumière, des matifiants ou analogues.According to a characteristic of the invention, the wire is obtained by spinning a composition comprising a copolymer as defined above. This composition may also include additives, fillers or other polymers used in a manner classic in the field of wire manufacturing. The nature of the additives is determined in depending on the end use of the wire. Thus, they can be, for example, additives of thermal stability, light, matifiers or the like.

Selon l'invention, le motif à caractère thermoplastique du polymère a, pour formule, au moins l'une des formules générales (I), (I') ou (II) [-CO- R1 - CO - NH - R2 - NH-] [-CO - R1 - NH ] [-CO - R3 - C O - O - R4 - O-] dans lesquelles :
R1, R2, R3 et R4, identiques ou différents représentent des groupements hydrocarbonés comprenant de 2 à 18 atomes de carbone.According to the invention, the pattern of thermoplastic nature of the polymer has, for formula, at least one of the general formulas (I), (I ') or (II) [-CO- R 1 - CO - NH - R 2 - NH-] [-CO - R 1 - NH] [-CO - R3 - CO - O - R 4 - O-] in which :
R 1 , R 2 , R 3 and R 4 , which are identical or different, represent hydrocarbon groups comprising from 2 to 18 carbon atoms.

Dans un mode préféré de l'invention, R1, R2 représentent des groupements hydrocarbonés aliphatiques linéaires ou ramifiés comprenant de 4 à 12 atomes de carbone, R1 représentant avantageusement un groupement polyméthylène comprenant 2, 3, 4, 5, 9, 10 ou 11 atomes de carbone et R2 représentant avantageusement un groupement polyméthylène comprenant 5, 6, 10 ou 11 atomes de carbone.In a preferred embodiment of the invention, R 1 , R 2 represent linear or branched aliphatic hydrocarbon groups comprising from 4 to 12 carbon atoms, R 1 advantageously representing a polymethylene group comprising 2, 3, 4, 5, 9, 10 or 11 carbon atoms and R 2 advantageously representing a polymethylene group comprising 5, 6, 10 or 11 carbon atoms.

En outre, le copolymère convenable pour l'invention peut comprendre plusieurs motifs différents conformes soit à la formule (I), et/ou à la formule (I'), et/ou à la formule (II).In addition, the copolymer suitable for the invention can comprise several different units conforming either to formula (I), and / or to formula (I '), and / or to the formula (II).

Ainsi, les motifs à caractère thermoplastique répondant aux formules (I), et/ou (I'), sont avantageusement les motifs correspondant aux polyamides PA 4, PA 6, PA 10, PA 11, PA 12, PA 6.6, PA 4.6, PA 10.6.Thus, the thermoplastic patterns corresponding to formulas (I), and / or (I ′), are advantageously the units corresponding to the polyamides PA 4, PA 6, PA 10, PA 11, PA 12, PA 6.6, PA 4.6, PA 10.6.

Dans un autre mode de réalisation préféré de l'invention, R3 représente un radical phénylène comprenant des liaisons libres en position para ou méta, R4 représentant un radical polyméthylène comprenant de 2 à 6 atomes de carbone.In another preferred embodiment of the invention, R 3 represents a phenylene radical comprising free bonds in the para or meta position, R 4 representing a polymethylene radical comprising from 2 to 6 carbon atoms.

Les motifs de formule II sont généralement les motifs des polyesters utilisés dans la fabrication de fil, fibre ou film tel que le polytéréphtalate de propylène glycol, le polytéréphtalate d'éthylène glycol, le polytéréphtalate de tétraméthylène glycol ou analogue. The units of formula II are generally the units of the polyesters used in the manufacture of wire, fiber or film such as polypropylene glycol terephthalate, polyethylene terephthalate, polytetramethylene glycol terephthalate or similar.

Le copolymère constituant les fils de la présente invention comprend également au moins un motif à caractère élastomère de formule générale (III) : - [- G - R6 - ( - O - R5 - )n- O - R7 - F - ] - dans laquelle :

  • R5, R6, R7 identiques ou différents représentent des groupements hydrocarbonés comprenant de 1 à 12 atomes de carbone, de préférence de 1 à 6 atomes de carbone,
  • G, F identiques ou différents représentent les groupements O ; CO ou NH
  • n est un nombre compris entre 2 et 50.
The copolymer constituting the yarns of the present invention also comprises at least one unit of elastomeric nature of general formula (III): - [- G - R 6 - (- O - R 5 -) n - O - R 7 - F -] - in which :
  • R 5 , R 6 , R 7, which are identical or different, represent hydrocarbon groups comprising from 1 to 12 carbon atoms, preferably from 1 to 6 carbon atoms,
  • G, F identical or different represent the groups O; CO or NH
  • n is a number between 2 and 50.

R5 comprend dans les modes de réalisation préférés de l'invention un nombre de carbone égal à 2, 3 ou 4 atomes de carbone.R 5 comprises in the preferred embodiments of the invention a number of carbon equal to 2, 3 or 4 carbon atoms.

Selon une autre caractéristique de l'invention la masse molaire des motifs de formule (III) est comprise entre 250 et 3000, de préférence entre 400 et 2000.According to another characteristic of the invention, the molar mass of the patterns of formula (III) is between 250 and 3000, preferably between 400 and 2000.

Les copolymères convenables pour l'invention peuvent être appelés des polyétheramides ou polyétheresteramides quand ils comprennent des motifs de formules (I),et/ou (I') et (III), et des polyétheresters quand ils comprennent des motifs de formules (II) et (III).The copolymers suitable for the invention may be called polyetheramides or polyetheresteramides when they include units of formulas (I), and / or (I ') and (III), and polyetheresters when they include units of formulas (II) and (III).

Ces copolymères peuvent être obtenus par réaction entre un oligomère ou un prépolymère avec des terminaisons acides, comprenant des motifs de formules (I),et/ou (I') ou (II) et des terminaisons acides, avec un polyoxyalkylène diamine ou son sel ou un polyoxyalkylène diol ou son ester comprenant des motifs de formule (III).These copolymers can be obtained by reaction between an oligomer or a prepolymer with acid endings, comprising units of formulas (I), and / or (I ') or (II) and acid terminations, with a polyoxyalkylene diamine or its salt or a polyoxyalkylene diol or its ester comprising units of formula (III).

Les oligomères ou prépolymères sont obtenus selon les procédés classiques de fabrication des polyamides ou des polyesters avec contrôle du degré d'avancement de la polymérisation pour obtenir un oligomère ou prépolymère de poids moléculaire désiré, et un excès du monomère acide pour obtenir des terminaisons acides. Cet excès de monomères acides peut être avantageusement remplacé par addition d'un diacide différent dudit monomère.The oligomers or prepolymers are obtained according to conventional methods for manufacturing polyamides or polyesters with control of the degree of progress of the polymerization to obtain an oligomer or prepolymer of desired molecular weight, and an excess of the acid monomer to obtain acid terminations. This excess of acid monomers can be advantageously replaced by adding a different diacid of said monomer.

Ces oligomères ou prépolymères ont de préférence un poids moléculaire compris entre 300 et 15000.These oligomers or prepolymers preferably have a molecular weight between 300 and 15,000.

Dans un autre mode de fabrication de copolymères de l'invention, les polyoxyalkylènes diamines ou leurs sels ou polyoxyalkylène diols ou leurs esters comprenant des motifs de formule (III) sont mélangés avec les monomères correspondant aux motifs de formules générales (I), (I') ou (II).In another mode of manufacture of copolymers of the invention, the polyoxyalkylene diamines or their salts or polyoxyalkylene diols or their esters comprising units of formula (III) are mixed with the corresponding monomers on the grounds of general formulas (I), (I ') or (II).

Ces procédés de fabrication peuvent être mis en oeuvre en présence ou non de solvants. These manufacturing processes can be carried out in the presence or not solvents.

On peut également utiliser un mélange de polyoxyalkylène diamines ou polyoxyalkylène diols.It is also possible to use a mixture of polyoxyalkylene diamines or polyoxyalkylene diols.

Les polyoxyalkylènes diamines convenables pour l'invention sont par exemple, les composés commercialisés sous le nom commercial "JEFFAMINE" par la Société Texaco.The polyoxyalkylene diamines suitable for the invention are by example, the compounds marketed under the trade name "JEFFAMINE" by the Texaco company.

Ces procédés de fabrication ne sont donnés qu'à titre d'illustration et sont largement décrits dans la littérature, notamment dans les brevets cités précédemment.These manufacturing processes are given for illustration only and are widely described in the literature, especially in the patents cited above.

Les copolymères obtenus présentent avantageusement une viscosité suffisante, par exemple supérieure à 50 Pa·s (500 poises) à la température de filage, pour permettre un filage en milieu fondu, sous des vitesses relativement élevées, par exemple supérieures à 1000 m/min, avantageusement comprises entre 2000m/min. et 5000 m/min..The copolymers obtained advantageously have a viscosity sufficient, for example greater than 50 Pa · s (500 poises) at the spinning temperature, to allow spinning in a molten environment, at relatively high speeds, for example greater than 1000 m / min, advantageously between 2000m / min. and 5000 m / min.

Le filage de ces polymères peut être réalisé selon les techniques connues de filage des filaments polyamide ou polyester, à savoir le polymère comprenant des additifs ou non est filé, en voie fondue, à travers une filière comprenant une pluralité de trous de section déterminée en fonction de la forme de la section du filament à produire.The spinning of these polymers can be carried out according to the known techniques of spinning of polyamide or polyester filaments, namely the polymer comprising additives or not is melted, spun through a die comprising a plurality of holes section determined according to the shape of the section of the filament to be produced.

Généralement, les filaments ainsi obtenus sont refroidis et rassemblés en un ou plusieurs faisceaux comprenant un nombre déterminé de filaments pour produire des fils.Generally, the filaments thus obtained are cooled and gathered in one or several bundles comprising a determined number of filaments to produce threads.

Les fils ainsi obtenus sont renvidés sur une bobine. Ces opérations peuvent être réalisées en une seule étape ou en plusieurs étapes. En outre, différents ensimages, tels que des ensimages lubrifiants, peuvent être déposés sur le fil ou les filaments de manière connue en soi.The son thus obtained are returned on a reel. These operations can be carried out in a single step or in several steps. In addition, different sizes, such that lubricating sizes can be deposited on the wire or filaments so known per se.

Les fils subissent un premier étirage sous la filière avant d'être rassemblés en faisceau. Ils peuvent être directement renvidés sur une bobine, le taux d'étirage étant alors égal au rapport de la vitesse de la bobine de renvidage à celle d'écoulement du polymère dans la filière. Dans un autre mode de fabrication des fils, ceux-ci sont soumis à des étirages supplémentaires après avoir été rassemblés, par exemple sur des bancs d'étirage, le taux d'étirage étant alors la somme des taux d'étirage appliqués au fil d'une part avant le rassemblement des filaments en faisceaux et d'autre part après ce rassemblement. Les étirages sur le fil après rassemblement peuvent être réalisés, à froid ou à chaud, avant le renvidage ou après celui-ci.The wires undergo a first stretch under the die before being gathered in beam. They can be directly rewound on a reel, the stretching rate then being equal to the ratio of the speed of the winding reel to that of the polymer flow in the industry. In another method of manufacturing the wires, these are subjected to additional draws after being assembled, for example on draw benches, the drawing rate then being the sum of the drawing rates applied over the one hand before the gathering of filaments in bundles and on the other hand after this gathering. The stretching on the wire after gathering can be carried out, cold or hot, before rewinding or after it.

Comme indiqués précédemment, la vitesse de filage et les étirages éventuels subséquents sont déterminés pour appliquer un taux d'étirage global au fil ne générant pas ou une très faible cristallisation de la matière synthétique. Ces données sont déterminées par des expériences successives et dépendent de la nature du copolymère constituant la matière synthétique.As indicated above, the spinning speed and any stretching are determined to apply an overall draw rate to the non-generating wire or a very low crystallization of the synthetic material. These data are determined by successive experiments and depend on the nature of the copolymer constituting the synthetic material.

Les fils de l'invention sont soumis à un procédé de texturation pour leur donner un gonflant ou augmenter leur volume apparent et leur élasticité. The yarns of the invention are subjected to a texturing process for their give a bulge or increase their apparent volume and elasticity.

Les conditions de mise en oeuvre de la texturation, notamment la température, la vitesse et le couple de torsion sont déterminées en fonction de la nature du copolymère, de la méthode et du matériel utilisé selon des techniques connues de l'homme du métier, pour obtenir une texturation optimale avec un minimum de casses et un maximum de stabilité. Toutefois, conformément à l'invention le fil doit subir un étirage lors de la texturation pour provoquer la cristallisation du copolymère constituant la matière synthétique. Cet étirage est fonction de la nature du copolymère et des conditions utilisées pour l'obtention du fil plat dans les procédés de filage et d'étirage. En outre, dans un mode préféré de l'invention on dépose une huile de lubrification sur le fil selon un taux pondéral avantageusement supérieur à 5 %, pendant le procédé de texturation.The conditions for implementing texturing, in particular the temperature, speed and torque are determined according to the nature of the copolymer, method and material used according to techniques known to man of the trade, to obtain an optimal texturing with a minimum of breaks and a maximum stability. However, according to the invention the wire must undergo stretching during texturing to cause crystallization of the copolymer constituting the material synthetic. This stretching depends on the nature of the copolymer and the conditions used for obtaining flat wire in the spinning and drawing processes. In addition, in a fashion preferred of the invention a lubricating oil is deposited on the wire at a weight rate advantageously greater than 5%, during the texturing process.

Ainsi, les fils texturés conformes à l'invention comprennent avantageusement au moins 5 % en poids d'ensimage.Thus, the textured yarns according to the invention advantageously comprise at least 5% by weight of size.

Ces fils texturés sont notamment utiles pour la réalisation de surfaces textiles, par exemple, par tricotage ou tissage. Ces fils peuvent être utilisés seuls ou en association avec des fils textiles en matière synthétique tels que fil polyamide, fil polyester, fil acrylique, fil PVC, fil viscose artificielle ou analogue, des fils en matière naturelle telle que coton, lin ou analogue.These textured threads are particularly useful for the realization of surfaces textiles, for example, by knitting or weaving. These wires can be used alone or in combination association with synthetic textile yarns such as polyamide yarn, polyester yarn, acrylic yarn, PVC yarn, artificial viscose yarn or the like, yarns of natural material such as than cotton, linen or the like.

Ils peuvent également être associés avec des fils apportant une caractéristique particulière à la surface textile, tels que des fils conducteurs de l'électricité comme des fils de carbone, en métal, des fils élastiques tels que les fils en élasthane.They can also be combined with wires providing special characteristic on the textile surface, such as electrically conductive threads like carbon threads, metal threads, elastic threads like spandex threads.

Un autre objet de l'invention sont les surfaces textiles comprenant des fils conformes à la présente invention qui se caractérisent par un toucher particulier différent de celui obtenu avec les fils en matière synthétique ou artificielle connus. Ce toucher se rapproche de celui des matières naturelles comme la soie, par exemple. Ceci a notamment été observé pour des surfaces textiles obtenues par tissage avec un fil de chaíne en polyamide et un fil de trame en copolymère conforme à la présente invention, notamment avec des fils ayant un titre au brin supérieur à 2 dtex.Another object of the invention are textile surfaces comprising threads according to the present invention which are characterized by a particular feel different from that obtained with known synthetic or artificial yarns. This touch is similar to that of natural materials such as silk, for example. This has notably was observed for textile surfaces obtained by weaving with a warp thread in polyamide and a copolymer weft yarn according to the present invention, in particular with threads having a strand count greater than 2 dtex.

Ces toucher et aspect particuliers ont également été trouvés pour des surfaces textiles obtenues par tricotage de fils texturés conformes à la présente invention.These particular touch and appearance have also been found for textile surfaces obtained by knitting textured yarns according to the present invention.

Les surfaces textiles obtenues avec des fils texturés conformes à l'invention présentent des propriétés thermiques et de surface différentes de celles des surfaces textiles obtenues avec des fils synthétiques connus tels que fils polyamides, fils polyesters. Ces propriétés ont été déterminées par utilisation du Système d'Evaluation Kawabata, également appelé KES-F et décrit dans la référence "Objective Spécification of Fabric Quality, Mechanical Properties and Performance" de Kawabata et al. publiée dans "The Textile Machinery Society of Japan, Osaka, 1982. Textile surfaces obtained with textured yarns according to the invention have different thermal and surface properties than textile surfaces obtained with known synthetic yarns such as polyamide yarns, polyester yarns. These properties were determined using the Kawabata Rating System, also called KES-F and described in the reference "Objective Specification of Fabric Quality, Mechanical Properties and Performance "by Kawabata et al. Published in" The Textile Machinery Society of Japan, Osaka, 1982.

Ainsi, des surfaces textiles teintes conformes à l'invention obtenues notamment, par tricotage de fils texturés de titre 22dTex 7 brins (22/7) présentent une effusivité supérieure à 0,1 J/cm2/s, une résistivité calorifique supérieure à 25 J/cm2/s. Ces propriétés thermiques sont élevées par rapport aux valeurs obtenues pour des surfaces textiles tricotées et teintes avec des fils en polymère conventionnel.Thus, dyed textile surfaces in accordance with the invention obtained in particular by knitting textured yarns with a 22dTex 7-strand count (22/7) have an effusivity greater than 0.1 J / cm 2 / s, a heat resistivity greater than 25 J / cm 2 / s. These thermal properties are high compared to the values obtained for knitted textile surfaces dyed with conventional polymer yarns.

Ces propriétés thermiques élevées pourraient être corrélées avec la sensation de chaleur constatée par l'échantillon de personnes qui ont porté des bas ou collants pour un test au porter qui sera décrit ci-dessous. Toutefois cette remarque n'est qu'une hypothèse et ne limite pas la portée de l'invention. Ainsi, une surface textile ne présentant pas une sensation de chaleur au porter, mais présentant des propriétés thermiques correspondant à celles décrites ci-dessus est dans le cadre de l'invention.These high thermal properties could be correlated with the sensation of heat observed by the sample of people who wore stockings or tights for a test to wear which will be described below. However, this remark is only hypothesis and does not limit the scope of the invention. Thus, a textile surface having no not a feeling of warmth when worn, but with thermal properties corresponding to those described above is within the scope of the invention.

Selon une autre caractéristique de l'invention, les surfaces textiles tricotées ci-dessus présentent un coefficient de frottement supérieur à 0,5, de préférence supérieur à 0,6. Ce coefficient de frottement est mesuré par le système Kawabata précipité sur une surface tendue.According to another characteristic of the invention, the knitted textile surfaces above have a coefficient of friction greater than 0.5, preferably greater than 0.6. This coefficient of friction is measured by the Kawabata system precipitated on a stretched surface.

Par ailleurs, selon une autre caractéristiques de l'invention les surfaces textiles tricotées obtenues avec les fils texturés de l'invention présentent une régularité de la dimension des mailles remarquables et qui ne peut être obtenue avec des fils texturés en polymères thermoplastiques. Cette régularité se traduit par des populations de mailles présentant des dimensions d'ailes de tête et de pied sensiblement constantes. Par population de mailles on entend les mailles obtenues avec des fils identiques et selon un procédé de tricotage identique.Furthermore, according to another characteristic of the invention, the surfaces knitted textiles obtained with the textured yarns of the invention have regularity in the remarkable mesh size which cannot be obtained with textured threads thermoplastic polymers. This regularity results in populations of meshes having substantially constant head and foot wing dimensions. By population mesh means the mesh obtained with identical son and according to a method of identical knitting.

D'autres buts, détails et avantages de l'invention apparaítront plus clairement au vu des exemples donnés ci-dessous uniquement à titre indicatif et d'illustration et des figures données en annexe, dans lesquelles :

  • la figure 1 représente schématiquement la texture d'un fil texturé conforme à la présente invention et réalisé par filage et texturation d'un polymère A défini ci-après,
  • la figure 2 représente schématiquement la texture d'un fil texturé conforme à la présente invention et réalisé par filage et texturation d'un polymère C défini ci-après,
  • la figure 3 représente schématiquement la texture d'un fil texturé conforme à la présente invention et réalisé par filage et texturation de Polyamide 6.6.,
  • la figure 4 représente une photographie avec grossissement de 30 fois des mailles d'une surface textile obtenue par tricotage circulaire à quatre chutes avec des fils texturés de la figure 2,
  • la figure 5 représente une photographie avec grossissement de 30 fois des mailles d'une surface textile obtenue par tricotage circulaire à quatre chutes avec des fils texturés de la figure 1, et
  • la figure 6 représente une photographie avec grossissement de 30 fois des mailles d'une surface textile obtenue par tricotage circulaire à quatre chutes avec des fils texturés de la figure 3.
Other objects, details and advantages of the invention will appear more clearly in the light of the examples given below solely for information and illustration and the figures given in the appendix, in which:
  • FIG. 1 schematically represents the texture of a textured yarn in accordance with the present invention and produced by spinning and texturing of a polymer A defined below,
  • FIG. 2 schematically represents the texture of a textured yarn according to the present invention and produced by spinning and texturing of a polymer C defined below,
  • FIG. 3 schematically represents the texture of a textured yarn according to the present invention and produced by spinning and texturing of Polyamide 6.6.,
  • FIG. 4 represents a photograph with 30 times magnification of the stitches of a textile surface obtained by circular knitting with four scraps with the textured threads of FIG. 2,
  • FIG. 5 represents a photograph with 30-fold magnification of the stitches of a textile surface obtained by circular knitting with four scraps with the textured threads of FIG. 1, and
  • FIG. 6 represents a photograph with 30-fold magnification of the stitches of a textile surface obtained by circular knitting with four scraps with the textured yarns of FIG. 3.

On décrira ci-dessous un exemple de préparation d'un copolymère conforme pour la fabrication des fils de l'invention.An example of the preparation of a conformal copolymer will be described below. for the manufacture of the threads of the invention.

Ce polymère comprend des motifs de formule (IV) -[-CO - (CH2)4 - NH -]- et des motifs de formule (V)

Figure 00080001
This polymer comprises units of formula (IV) - [- CO - (CH 2 ) 4 - NH -] - and units of formula (V)
Figure 00080001

Ce copolymère est obtenu par addition dans un réacteur de 201,2 parties en poids de caprolactame avec 72,980 parties en poids d'un polyoxypropylène diamine commercialisé par la Société Texaco sous la dénomination "JEFFAMINE D-2000 ", 2,687 parties en poids d'acide adipique et comme catalyseur de l'acide phosphoreux.This copolymer is obtained by addition to a 201.2 part reactor in weight of caprolactam with 72.980 parts by weight of a polyoxypropylene diamine marketed by Texaco under the name "JEFFAMINE D-2000", 2,687 parts by weight of adipic acid and as a catalyst for phosphorous acid.

On ajoute également un stabilisant thermique tel que le composé commercialisé par la Société Ciba-Geigy sous le nom IRGANOX 1010, dans une proportion de 1,25 parties en poids.A thermal stabilizer such as the compound is also added marketed by Ciba-Geigy under the name IRGANOX 1010, in a proportion of 1.25 parts by weight.

Cette masse réactionnelle est maintenue sous balayage d'un gaz inerte tel que l'azote, et chauffée à une température de 148°C sous une pression autogène de 400 KPa.This reaction mass is kept under the sweeping of an inert gas such as than nitrogen, and heated to a temperature of 148 ° C under an autogenous pressure of 400 KPa.

On continue à chauffer sous pression jusqu'à une température de 242°C, tout en éliminant les produits volatils par distillation.We continue to heat under pressure to a temperature of 242 ° C, while removing volatiles by distillation.

Après avoir ramener la pression à une valeur proche de la pression atmosphérique, on maintient le mélange pendant 1 heure à 260°C, puis pendant 40 minutes sous une pression réduite à la même température pour obtenir un degré de polymérisation déterminé. Ce degré de polymérisation est contrôlé par la mesure de la viscosité de la masse réactionnelle. After reducing the pressure to a value close to the pressure atmospheric, the mixture is maintained for 1 hour at 260 ° C, then for 40 minutes under reduced pressure at the same temperature to obtain a degree of polymerization determined. This degree of polymerization is controlled by measuring the viscosity of the reaction mass.

Le copolymère ainsi obtenu est coulé puis granulé et lavé à l'eau et enfin séché.The copolymer thus obtained is poured then granulated and washed with water and finally dried.

Le copolymère obtenu présente une température de fusion de 219°C, une température de cristallisation de 150°C, et une viscosité mesurée sur une solution à 0,5 % dans le méta-crésol à 25°C de 103 ml/g.The copolymer obtained has a melting temperature of 219 ° C, a crystallization temperature of 150 ° C, and a viscosity measured on a 0.5% solution in meta-cresol at 25 ° C of 103 ml / g.

Le copolymère comprend une concentration pondérale en motif élastomère de formule (V) égale à 30 %.The copolymer comprises a concentration by weight of elastomeric unit of formula (V) equal to 30%.

Plusieurs copolymères conformes à l'invention ont été utilisés pour la fabrication de fil.Several copolymers in accordance with the invention have been used for the wire manufacturing.

Le copolymère est fondu à une température de l'ordre de 260°C puis injecté dans une filière comprenant 2x7 trous de diamètre 0,34 mm, sous une pression de 8 MPa à 10 MPa et une température de filière de 260°C. Les filaments après rassemblement en faisceaux pour la formation de 7 brins, refroidissement et dépose d'un ensimage lubrifiant sont renvidés sur une bobine à une vitesse de l'ordre de 3100 m/min. avec une faible tension de renvidage.The copolymer is melted at a temperature of the order of 260 ° C. and then injected in a die comprising 2x7 holes with a diameter of 0.34 mm, at a pressure of 8 MPa at 10 MPa and a die temperature of 260 ° C. The filaments after gathering in bundles for the formation of 7 strands, cooling and depositing of a lubricating size are wound on a reel at a speed of the order of 3100 m / min. with low voltage rewinding.

Les conditions de filage pour trois polymères sont rassemblées dans le tableau ci-joint Polymère Température de fusion
°C Température de filière
°C Vitesse de renvidage
m/min. Taux d'étirage A 219 288 4200 231 B 175 268 3100 222 C 205 260 2000 228

  • Polymère A: copolymère fabriqué selon l'exemple précédent
  • Polymère B: copolymère comprenant comme motif thermoplastique le motif du polyamide 12 (PA12) et comme motif élastomère un polyoxytétraméthylène diol avec un rapport pondéral de motif élastomère au motif thermoplastique égal à 30%.
  • Polymère C: copolyétherester comprenant comme motif thermoplastique un téréphtalate de tétraméthylène glycol et comme motif élastomère un polyoxytétraméthylène diol avec un rapport pondéral de motif élastomère au motif thermoplastique égal à 30%.
    • The spinning conditions for three polymers are gathered in the attached table Polymer Melting temperature
    ° C     Die temperature
    ° C     Winding speed
    m / min.     Draw rate     AT 219 288 4200 231 B 175 268 3100 222 VS 205 260 2000 228
  • Polymer A : copolymer produced according to the previous example
  • Polymer B : copolymer comprising as a thermoplastic unit the motif of polyamide 12 (PA12) and as an elastomeric unit a polyoxytetramethylene diol with a weight ratio of elastomeric unit to the thermoplastic unit equal to 30%.
  • Polymer C : copolyetherester comprising as a thermoplastic unit a tetramethylene glycol terephthalate and as an elastomeric unit a polyoxytetramethylene diol with a weight ratio of elastomeric unit to thermoplastic unit equal to 30%.

    • Par taux d'étirage, on entend le rapport entre la vitesse de renvidage d'un fil et la vitesse d'écoulement du polymère fondu dans les orifices de la filière d'extrusion. Ce taux d'étirage est le taux d'étirage global du fil avant texturation, c'est à dire il comprend d'une part l'étirage subi par le fil en sortie de filière pendant sa solidification, et d'autre part, le ou les étirages subséquents appliqués au fil solidifié. Ces étirages subséquents peuvent être effectués à froid ou à chaud, directement en sortie de filière, comme dans les procédés à étirage intégré, ou après un premier renvidage du fil.By drawing rate is meant the ratio between the speed of winding a wire and the flow rate of the molten polymer through the orifices of the extrusion die. This draw rate is the overall draw rate of the yarn before texturing, i.e. it includes on the one hand, the drawing undergone by the wire leaving the die during its solidification, and on the other hand, the subsequent drawing (s) applied to the solidified wire. These subsequent stretchings can be carried out cold or hot, directly at the outlet of the die, as in the processes with integrated drawing, or after a first winding of the wire.

    Les fils obtenus présentent les caractéristiques rassemblées dans le tableau ci-joint : Fil Polymère Module de Young CN/Tex Ténacité cN/Tex allongement % Titre
    dTex         A1 A 75 18,5 66,7 28,1 B1 B 64 23,1 110 28,6 C1 C 34 16,5 138 27,3     The wires obtained have the characteristics gathered in the attached table: Wire Polymer Young CN / Tex module Tenacity cN / Tex elongation% Headline
    dTex     A1 AT 75 18.5 66.7 28.1 B1 B 64 23.1 110 28.6 C1 VS 34 16.5 138 27.3

    Une analyse thermique différentielle de ces fils montrent que le copolymère est sous forme amorpheA differential thermal analysis of these wires show that the copolymer is in amorphous form

    Ces fils ont été texturés dans un procédé de texturation par friction appelé 'fausse torsion", utilisant une broche de texturation comprenant des disques en céramique selon une vitesse de texturation de 300 m/min. à une température de l'ordre de 150°C, sous un taux d'étirage de l'ordre de 1,3 et un D/Y de 2. La texturation a été réalisée avec un surhuilage de l'ordre de 6%.These threads were textured in a friction texturing process called 'false twist', using a texturing pin including ceramic discs at a texturing speed of 300 m / min. at a temperature of the order of 150 ° C., under a stretch ratio of around 1.3 and a D / Y of 2. Texturing was carried out with a over-oiling of the order of 6%.

    Les fils texturés présentent les caractéristiques suivantes : Fil Polymère Contrainte
    cN/Tex     Ténacité
    cN/Tex     allongement
    %     Titre
    dTex         A1 A 26 20,2 29 24,9 B1 B 46,5 27,3 70 24 C1 C 37,6 21,1 77,7 22     Textured yarns have the following characteristics: Wire Polymer Constraint
    cN / Tex     Tenacity
    cN / Tex     elongation
    %     Headline
    dTex     A1 AT 26 20.2 29 24.9 B1 B 46.5 27.3 70 24 C1 VS 37.6 21.1 77.7 22

    Ces propriétés sont les propriétés dynamométriques du fil, elles représentent donc les propriétés du matériau constituant le fil.These properties are the dynamometric properties of the wire, they represent therefore the properties of the material constituting the wire.

    La texture des fils texturés obtenus avec les fils plats A1 et C1 est illustrée par les figures 1 et 2.The texture of the textured yarns obtained with the flat yarns A1 and C1 is illustrated. by Figures 1 and 2.

    Ces figures montrent que la cohésion du fil texturé est élevée et qu'il ne présente qu'un faible nombre de boucles. De plus, ces boucles sont de dimensions faibles.These figures show that the cohesion of the textured thread is high and that it does not shows only a small number of loops. In addition, these loops are of small dimensions.

    Ainsi, un fil texturé conforme à l'invention présente ,de manière apparente un diamètre sensiblement constant sur toute sa longueur. Cette caractéristique peut être quantifié par le rapport entre le diamètre D maximum apparent du fil et le diamètre d moyen apparent.Thus, a textured yarn according to the invention apparently has a substantially constant diameter over its entire length. This feature can be quantified by the ratio between the maximum diameter D of the wire and the apparent average diameter d apparent.

    Par diamètre D maximum apparent on entend le diamètre d'une enveloppe cylindrique dans laquelle serait circonscrit l'ensemble du fil, boucles incluses.By apparent maximum diameter D is meant the diameter of a cylindrical envelope in which the whole of the wire would be circumscribed, loops included.

    Par diamètre d moyen apparent, on entend le diamètre d'une enveloppe cylindrique dans laquelle serait circonscrit l'ensemble du fil, boucles exclues.By apparent diameter d is meant the diameter of a cylindrical envelope in which the whole of the wire would be circumscribed, loops excluded.

    Dans le cas du fil des figures 1 et 2 ce rapport est inférieur à 2.In the case of the wire of FIGS. 1 and 2, this ratio is less than 2.

    La figure 3 illustre la texture d'un fil texturé obtenu à partir de Polyamide 6.6. La différence de texture entre ce fil et les fils de l'invention est évidente. Pour ce fil à base de PA 6.6 le rapport des diamètres D/d est voisin de 4.Figure 3 illustrates the texture of a textured yarn obtained from Polyamide 6.6. The difference in texture between this yarn and the yarns of the invention is obvious. For this thread base of PA 6.6 the ratio of diameters D / d is close to 4.

    Des surfaces textiles ont été réalisées par tricotage de ces fils texturés selon un procédé classique de tricotage pour la fabrication de bas ou collants, c'est à dire un tricotage circulaire avec armure JERSEY/400 aiguilles sur un métier MATEC HS à partir de quatre chutes (2 tors S/2 tors Z).Textile surfaces were produced by knitting these textured yarns according to a conventional knitting process for the production of stockings or tights, i.e. a circular knitting with JERSEY weave / 400 needles on a MATEC HS loom from four falls (2 tors S / 2 tors Z).

    Les surfaces ainsi obtenues ont été teintes et traitées selon les techniques habituelles de teinture et traitement tel que adoucissage des tricots pour bas et collants.The surfaces thus obtained were dyed and treated according to techniques usual dyeing and treatment such as softening knitwear for stockings and tights.

    Les structures des tricots obtenus avec respectivement les fils texturés A1 et C1 sont illustrées aux figures 4 et 5. La figure 6 illustre, à titre comparatif, la structure d'un tricot obtenu selon le même procédé de tricotage avec des fils texturés en PA6.6.The structures of the knits obtained with the textured yarns A1 and respectively C1 are illustrated in Figures 4 and 5. Figure 6 illustrates, for comparison, the structure of a knit obtained according to the same knitting process with textured yarns in PA6.6.

    Les mailles du tricot conforme à l'invention présentent une régularité dimensionnelle remarquable. Ainsi, la dimension des ailes, pied et tête des mailles est sensiblement constante sur toute la surface du tricot, dans le cas illustré.The stitches of the knit according to the invention have a regularity remarkable dimensional. Thus, the dimension of the wings, foot and head of the meshes is substantially constant over the entire surface of the knitted fabric, in the illustrated case.

    Bien entendu, une surface tricotée peut comprendre plusieurs types de mailles ou des mailles dont les dimensions sont différentes car les conditions de tricotage ont été modifiées formant ainsi plusieurs population de mailles. Toutefois, avec des fils de l'invention chaque population de mailles d'une surface tricotée présente une dimension de mailles régulière et constante.Of course, a knitted surface can include several types of stitches or stitches with different dimensions because the knitting conditions were modified thus forming several population of meshes. However, with sons of the invention each population of stitches of a knitted surface has a dimension of regular and constant mesh.

    Les bas fabriqués ont également été testés par un échantillon de 35 personnes pour réaliser un test au porter et apprécier les caractéristiques de cette nouvelle surface textile. The stockings produced were also tested by a sample of 35 people to carry out a test to wear and appreciate the characteristics of this new textile surface.

    Ce test a été réalisé en donnant, en aveugle, aux personnes concernées plusieurs paires de bas dont une était conforme à l'invention, les autres correspondaient à des surfaces textiles classiquement utilisées pour cette application telles que du voile en polyamide 6.6 ou un bas contenant du polyamide 6.6 en mélange avec du fil élasthane. Ces bas ont été obtenus à partir de fils présentant des titres identiques.This test was carried out by giving blind people several pairs of stockings, one of which was in accordance with the invention, the others corresponded to textile surfaces conventionally used for this application such as veil in polyamide 6.6 or a stocking containing polyamide 6.6 mixed with spandex yarn. These stockings were obtained from yarns having identical titles.

    Les personnes devaient qualifier la sensation du contact peau/tricot lors de trois opérations distinctes, à savoir la sensation avec la main, lors de l'enfilage du bas et au porter les résultats sont indiqués dans le tableau 4 ci-dessous. Les pourcentages représentent le nombre de personnes ayant perçu la même sensation . OPERATION SENSATION BAS EN FIL A2 (fils de titre 22/7/section ronde) BAS EN VOILE PA66
    (idem)     BAS EN PA66 ÉLASTHANE
    (idem)         MAIN nouvelle Oui : 84% Non : 63% Non : 100% chaude 72 % 13 % 40 % froide 4 % 47 % 40 % sans 24 % 47 % 20 % ENFILAGE chaud 72 % 20 % 40 % froid 4 % 53 % 50 % sans 24 % 27 % 10 % douceur soyeux : 68 %
    2nd peau : 28 %
    sans : 4 %     2nd peau : 34 %
    gommeux : 8 %
    rêche : 34 %
    sans : 24%     2nd peau : 50 %
    gommeux : 30%
    rêche:20%         PORTER soyeux : 68 %
    2nd peau : 28 %
    sans : 4 %     2nd peau : 40 %
    gommeux : 0 %
    rêche : 46%
    sans : 4 %     2nd peau : 40 %
    gommeux : 50%
    rêche:10%         People had to qualify the sensation of skin / knit contact during three separate operations, namely the sensation with the hand, when putting on the stockings and when wearing the results are shown in Table 4 below. The percentages represent the number of people who perceived the same sensation. SURGERY SENSATION LEAD IN WIRE A2 (title wires 22/7 / round section) DOWN IN SAIL PA66
    (Same)     LOW IN ELASTHANE PA66
    (Same)     HAND news Yes: 84% No: 63% No: 100% hot 72% 13% 40% cold 4% 47% 40% without 24% 47% 20% THREADING hot 72% 20% 40% cold 4% 53% 50% without 24% 27% 10% sweetness silky: 68%
    2 nd skin: 28%
    without: 4%     2 nd skin: 34%
    gummy: 8%
    rough: 34%
    without: 24%     2 nd skin: 50%
    gummy: 30%
    rough: 20%     CARRY silky: 68%
    2 nd skin: 28%
    without: 4%     2 nd skin: 40%
    gummy: 0%
    rough: 46%
    without: 4%     2 nd skin: 40%
    gummy: 50%
    rough: 10%

    En outre, les impressions générales sur ces produits ont porté sur le facteur de la sensation du contact avec la peau. L'impression générale caractérisant chaque article est la suivante :

    • Pour les bas obtenus avec les fils conformes à l'invention 75 % des personnes les caractérisent par une sensation de toucher très agréable .
    • Pour ceux en voile PA66, la caractéristique la plus relevée est le caractère rêche au toucher .
    • Enfin, pour les bas en mélange PA66 et élasthane, 50 % des personnes les caractérisent par leur bonne élasticité .
    In addition, the general impressions on these products focused on the factor of the sensation of contact with the skin. The general impression characterizing each article is as follows:
    • For the stockings obtained with the yarns according to the invention, 75% of people characterize them by a very pleasant feeling of touch.
    • For those in PA66 sail, the most noticeable feature is the rough feel.
    • Finally, for stockings in PA66 and spandex blend, 50% of people characterize them by their good elasticity.

    Les surfaces textiles ont également été testées selon le système KES-F de Kawabata.The textile surfaces have also been tested according to the KES-F system of Kawabata.

    Les mesures effectuées ont permis d'évaluer les propriétés thermiques, et de surface du tricot.The measurements carried out made it possible to evaluate the thermal properties, and to knitting surface.

    A titre de comparaison une surface textile tricotée et teinte selon le même procédé a été réalisée avec du fil PA 6.6.By way of comparison, a knitted textile surface dyed according to the same process was carried out with PA 6.6 yarn.

    Les résultats sont rassemblés dans les tableaux ci-dessous.The results are collated in the tables below.

    - Propriétés thermiques :- Thermal properties:

    POLYMEREPOLYMER EFFUSIVITE
    J/cm2/s    EFFUSTIVENESS
    J / cm 2 / s         RESISTIVITE
    J/cm2/s    RESISTIVITY
    J / cm 2 / s         chiffoncloth au porterto wear chiffoncloth AAT 0,1100.110 0,1070.107 26,326.3 BB 0,1090.109 0,1070.107 27,027.0 CVS 0,1050.105 0,1250.125 27,027.0 PA 6.6PA 6.6 0,090.09 0,0860.086 22,522.5

    L'effusivité en J/cm2/s est mesurée sous 9 cm2, à une tension de 1 gf/cm2 et une différence de 10°C .The effusiveness in J / cm 2 / s is measured under 9 cm 2 , at a tension of 1 gf / cm 2 and a difference of 10 ° C.

    La position "au porter" signifie que le tricot est tendu à l'extensibilité correspondant à celle d'un porter réel, tandis que la position "chiffon" signifie qu'une légère tension est appliquée sur le tricot, uniquement pour son maintien.The position "to wear" means that the knit is stretched matching that of an actual wearer, while the "cloth" position means that a slight tension is applied to the knit, only to maintain it.

    La résistivité en J/cm2/s est mesurée sous 25 cm2 et une différence de température de 10°C The resistivity in J / cm 2 / s is measured under 25 cm 2 and a temperature difference of 10 ° C

    Ces valeurs nettement plus élevées que pour le tricot en PA 6.6 peuvent être significatives de l'effet de fraícheur instantanée observée lors du test au porter, et la sensation de chaleur.These significantly higher values than for knitting in PA 6.6 can be significant of the effect of instant freshness observed during the wear test, and the feeling of warmth.

    - Propriétés de surface :- Surface properties:

    Le coefficient de frottement a été déterminé avec un frotteur de 5 x 5 mm, une vitesse de déplacement de 1 mm/s et une charge de 50 gf. Les résultats sont rassemblés dans le tableau 6 ci-dessous. POLYMERE COEFFICIENT DE FROTTEMENT Chiffon Au porter A -- 0,74 B 0,65 0,66 C 0,41 1,00 PA 6.6 0,32 0,39 The coefficient of friction was determined with a 5 x 5 mm wiper, a displacement speed of 1 mm / s and a load of 50 gf. The results are collated in Table 6 below. POLYMER COEFFICIENT OF FRICTION Cloth To wear AT - 0.74 B 0.65 0.66 VS 0.41 1.00 PA 6.6 0.32 0.39

    Ces résultats du test au porter et du système KAWABATA montrent la nouvelle sensation et les nouvelles caractéristiques des surfaces textiles obtenues avec des fils conformes à la présente invention .These results of the wear test and the KAWABATA system show the new sensation and the new characteristics of the textile surfaces obtained with yarns conforming to the present invention.

    Claims (23)

    1. Textured yarn made of synthetic material, characterized in that it is obtained by texturing a flat yarn produced from a composition including at least one copolymer consisting of at least one unit of elastomeric character and of at least one unit of thermoplastic character, the percentage by weight of elastomeric unit being between 10 and 40 %, that of thermoplastic unit being between 90 and 60 %, and in that it has a ratio of its apparent maximum diameter D to its apparent average diameter d of between 1 and 2.5.
    2. Yarn according to Claim 1, characterized in that the abovementioned ratio of the diameters is lower than 2.
    3. Yarn according to either of Claims 1 and 2, characterized in that it is obtained by texturing an amorphous flat yarn and in that the crystallization of the yarn is produced by the drawing applied to the latter in the texturing process.
    4. Yarn according to one of the preceding claims, characterized in that it includes at least 5 % by weight of a sizing agent on its surface.
    5. Yarn according to one of the preceding claims, characterized in that the weight percentage of elastomer units is between 15 and 30 %, that of the thermoplastic units being between 85 and 70 %.
    6. Yarn according to one of the preceding claims, characterized in that the thermoplastic unit has the general formula (I) or (I'): [CO-R1-CO-NH-R2-NH] [CO-R1-NH] in which:
      R1 and R2, which are identical or different, denote hydrocarbon groups containing from 2 to 18 carbon atoms.
    7. Yarn according to Claim 6, characterized in that R1 and R2 denote linear aliphatic groups containing from 4 to 12 carbon atoms.
    8. Yarn according to either of Claims 6 and 7, characterized in that the copolymer contains a number of different units of general formula (I) and/or (I').
    9. Yarn according to one of Claims 6 to 8, characterized in that R1 is a polymethylene group containing 2, 3, 4, 5, 9, 10 or 11 carbon atoms.
    10. Yarn according to one of Claims 6 to 9, characterized in that R2 is a polymethylene group containing 5, 6, 10 or 11 carbon atoms.
    11. Yarn according to one of Claims 1 to 4, characterized in that the thermoplastic unit has the general formula (II) [CO-R3-CO-O-R4-O] in which:
      R3 and R4, which are identical or different, denote hydrocarbon groups containing from 4 to 18 carbon atoms.
    12. Yarn according to Claim 11, characterized in that R3 denotes a phenylene radical containing free bonds in para or meta position and R4 denotes a polymethylene radical containing from 2 to 6 carbon atoms.
    13. Yarn according to one of the preceding claims, characterized in that the elastomer unit has the formula (III) [G-R6-(-O-R5-)n-O-R7-F] in which:
      R5, R6 and R7, which are identical or different, are hydrocarbon groups containing from 1 to 12 carbon atoms,
      G and F, which are identical or different, denote the groups O, CO or NH
      n is a number included between 2 and 50.
    14. Yarn according to Claim 13, characterized in that R5, R6 and R7 are polymethylene groups containing from 1 to 6 carbon atoms.
    15. Yarn according to Claim 13 or 14, characterized in that the elastomer unit of formula (III) has a molecular weight of between 250 and 3000, preferably 400 to 2000.
    16. Yarn according to either of Claims 14 and 15, characterized in that R5 contains 2, 3 or 4 carbon atoms.
    17. Yarn according to one of Claims 1 to 16, characterized in that it is obtained by texturing according to the false twist process.
    18. Textile surface characterized in that it includes at least one yarn according to one of Claims 1 to 17.
    19. Textile surface according to Claim 18, characterized in that it is obtained by weaving with a yarn according to one of Claims 1 to 17 as weft yarn.
    20. Textile surface according to Claim 18, characterized in that it consists of yarns according to one of Claims 1 to 17 and is obtained by knitting.
    21. Textile surface according to one of Claims 18 to 20, characterized in that it has an effusivity higher than 0.1 J/cm2/s.
    22. Textile surface according to one of Claims 18 to 21, characterized in that it represents a calorific resistivity higher than 25 J/cm2/s.
    23. Textile surface according to one of Claims 18 to 22, characterized in that it has a friction coefficient higher than 0.5, preferably higher than 0.6, measured on stretched surface.
    EP94912573A 1993-04-01 1994-03-30 Textured synthetic yarn and fabric surfaces containing same Expired - Lifetime EP0692040B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9304094 1993-04-01
    FR9304094 1993-04-01
    PCT/FR1994/000361 WO1994023101A1 (en) 1993-04-01 1994-03-30 Textured synthetic yarn and fabric surfaces containing same

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    EP0692040A1 EP0692040A1 (en) 1996-01-17
    EP0692040B1 true EP0692040B1 (en) 1998-02-11

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    ES (1) ES2112534T3 (en)
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    WO2005080471A1 (en) * 2004-01-22 2005-09-01 Rhodia Chimie Method for production of non-woven surfaces
    FR2865480B1 (en) * 2004-01-22 2006-02-24 Rhodia Polyamide Intermediates PROCESS FOR PRODUCING NON-WOVEN SURFACES

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    WO1989004885A1 (en) * 1987-11-17 1989-06-01 Viscosuisse Sa Process for manufacturing an elastic bulk yarn

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    DE69408531D1 (en) 1998-03-19

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