Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/402—Amides imides, sulfamic acids
  • D06M13/432—Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
  • D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
  • D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/368—Hydroxyalkylamines; Derivatives thereof, e.g. Kritchevsky bases
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/16—Synthetic fibres, other than mineral fibres
  • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M2101/34—Polyamides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/16—Synthetic fibres, other than mineral fibres
  • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M2101/34—Polyamides
  • D06M2101/36—Aromatic polyamides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/62—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds with sulfate, sulfonate, sulfenic or sulfinic groups
  • D06P1/621—Compounds without nitrogen
  • D06P1/622—Sulfonic acids or their salts
  • D06P1/623—Aliphatic, aralophatic or cycloaliphatic
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/642—Compounds containing nitrogen
  • D06P1/645—Aliphatic, araliphatic or cycloaliphatic compounds containing amino groups
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/642—Compounds containing nitrogen
  • D06P1/649—Compounds containing carbonamide, thiocarbonamide or guanyl groups
  • D06P1/6491—(Thio)urea or (cyclic) derivatives
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/24—Polyamides; Polyurethanes

Definitions

• the present invention relates to auditory compositions for the preparation of textile auxiliaries, especially used to increase the dye affinity of textile fibers.
• Technological background of the invention :
• the knitted polyamide fibers are thus treated at temperatures of between 170 and 200 ° C., or even more, especially according to the elastane content of the knits.
• An increase in the elastane content leads to increasing the processing temperature to obtain the required dimensional stability.
• this heat treatment also has the effect, especially in the case of polyamide fibers, to deteriorate the mechanical properties of the son.
• This mechanical deterioration is already penalizing in itself, but the observations made in the factory on decommissioned lots or in the laboratory systematically correlate this deterioration of the mechanical properties with a decrease in the dye affinity of the fibers, and with a problem of unison of the colour.
• Knits that are not uniformly dyed or are too pale in color must be re-used in a darker color, or re-painted a second time, and are often downgraded, resulting in significant economic loss.
• unison agents which allow to have a better dispersion of the dye in the dye bath, or act either by their affinity with the fiber, or by their affinity with the dye. dye.
• dye for example, nonionic surfactants such as ethoxylated fatty alcohols, ethoxylated or non-ethoxylated fatty acids, ethoxylated fatty amines, alkyl phenols and the like.
• nonionic surfactants such as ethoxylated fatty alcohols, ethoxylated or non-ethoxylated fatty acids, ethoxylated fatty amines, alkyl phenols and the like.
• fatty mercaptans or products containing bisulfate anions, as well as quaternary ammonium compounds.
• the present invention thus relates to a composition in the form of an aqueous solution or emulsion comprising:
• hydroxyalkylamines of the formula: NXiX 2 (C n H 2n OH), wherein Xi and X 2 are independently of the other is hydrogen or hydroxyalkyl radicals of respective formulas C n iH 2n iOH and C n2 H 202 OH, and n, ni, n 2 are integers from 2 to 6, and (b) one or more anionic surfactants selected from alkyl sulfates, alkyl sulfonates, (paraffin sulfonates), alkyl aryl sulfonates, alkyl ether phosphates, alkyl carboxylates, and at least one compound (c) and / or (d) such as:
• (c) is selected from one or more thioureas (thiocarbamides) of formula R R 2 N (CS) NR 3 R 4 , where R 1, R 2 , R 3 , R 4 are independently either hydrogen or hydrocarbon radicals having 1 to 5 carbon atoms, (d) is selected from one or more dialkyl sulfosuccinates in combination with one or more antifreezes selected from methanol, isopropanol, glycols, preferably glycerol, ethylene glycol, propylene glycol or glycol ethers, preferably ethers of ethylene glycol or propylene glycol.
• Such compositions systematically preserve good mechanical properties of the fibers and a very good dyeing affinity, higher than those obtained with textile auxiliaries of the state of the art, whatever the origin of the fibers, for example polyamides. and for high values of treatment temperatures.
• the preservation of the dye affinity is constant, eliminates the risks noted with the processes of the prior art. Not only is there a better preservation of the dye affinity, but also a better unison of dyeing.
• additives for textile auxiliaries according to the invention can be handled safely by the operators. It is also possible to formulate additives according to the invention comprising a minimum of toxicity, as neutral as possible for the environment, and therefore preferably easily removable and biodegradable.
• compositions according to the invention (a) represents from 1 to 15% by weight, preferably from 2 to 10% by weight, or even more preferably from 6 to 9% by weight, (b) represents from 10 to 50% by weight.
• (c) and / or (d) represent 3 to 15% by weight, and the amount of water represents less than 75% by weight of the composition, preferably from 10 to 70%, preferably 50 to 60% by weight.
• compositions according to the invention where the sequestering agents represent from 0.2 to 2% by weight in the composition.
• At least one hydroxyalkylamine (a) is such that X 1 and X 2 represent hydrogen, and n is an integer ranging from 2 to 6.
• the hydroxyalkylamine (a) is chosen from monoethanolamine, diethanolamine, or triethanolamine.
• the alkyl groups of the anionic surfactants (b) comprise from 8 to 22 carbon atoms, preferably from 10 to 18 carbon atoms.
• At least one radical R 1, R 2 , R 3 or R 4 represents hydrogen, preferably R 1, R 2 , R 3 and R 4 represent the hydrogen.
• the alkyl sulphosuccinate dialkyl groups of the compounds (d) contain from 8 to 22, preferably 8 to 12, carbon atoms.
• the compounds (d) are chosen from alkali and alkaline earth metal salts, preferentially sodium, preferentially sodium dioctyl sulfosuccinate.
• the glycol ethers of the composition (d) have the formula: RO- (CH 2 -CH (X)) n 3 -O-R ', with X being either an atom of hydrogen is a CH 2 group, R, R 'being carbon chains comprising between 1 and 5 carbon atoms, and n 3 is an integer between 1 and 10, preferably 1 and 5, preferably 1.
• the composition according to the invention comprises the compounds (a), (b) (c) and a sequestering agent as described above or comprises the compounds (a), (b) and ( d) as described above.
• the present invention also relates to textile auxiliaries incorporating the compositions according to the invention obtained by dilution in water of these compositions.
• the total amount of water is more than 75% by weight, preferably 95 to 99% by weight. More preferably, in the textile auxiliaries the total amount by weight of active material represented by the compounds (a), (b), (c) and / or (d) ranges from 0.2% to 25%, preferably from 1% to 5%.
• the present invention also relates to a process for treating textile yarns, fabrics or knits, intended to undergo a heat treatment, possibly followed by dyeing, comprising, upstream of the heat treatment, a pretreatment of said yarns, fabrics or knits by immersion in a padding bath containing a textile auxiliary according to the invention.
• said fabrics or knits are expressed so that they are coated with 0.1 to 5% by weight, preferably 1 to 4%, more preferably 2 to 4% by weight of material.
• the fibers undergo a multitude of treatments and conditioning various, during spinning operations, winding, knitting, weaving, dimensional stabilization treatment, dyeing, ...
• the fibers can thus be in contact with a large quantity of additives, for example wetting agents, detergents, lubricants, antistatic agents, biocides, bactericides, sequestering agents, hydrogen peroxide stabilizers, sizing agents, dispersants, pH stabilizers, defoamers, unison agents, dyes, dye accelerators, etc.
• additives for example wetting agents, detergents, lubricants, antistatic agents, biocides, bactericides, sequestering agents, hydrogen peroxide stabilizers, sizing agents, dispersants, pH stabilizers, defoamers, unison agents, dyes, dye accelerators, etc.
• compositions according to the invention can be introduced into the processing line of knits and textile fabrics prior to the thermal dimensional stabilization operation, which itself precedes the dyeing operation, without changing the process conditions. Indeed, as the compositions according to the invention are in aqueous solutions or emulsions, they are directly diluted in the padding water bath present upstream of the heat treatment furnace.
• the present invention also relates to the use of these textile auxiliaries for preserving the tenacity and the elongation before breaking of textile fibers and yarns made of textile fibers intended to undergo heat treatment.
• Another object of the present invention is the use of these textile auxiliaries to preserve the dye affinity of textile fibers, yarns, fabrics or knits of textile fibers, intended to undergo a heat treatment.
• hydroxyalkylamines of the compositions according to the invention correspond to the formula NX 1 X 2 (C n H 2n OH), in which X 1 and X 2 are independently of each other either hydrogen or hydroxyalkyl radicals of respective formulas C nl iOH H 2n and C ⁇ n2 n2 OH, and n, ni, n 2 are integers from 2 to 6.
• These compounds provide the additive compositions according to the invention with cold stability properties. Thus, they can be stored cold (around 0 ° C), without the various compounds dissolved in aqueous solution precipitate.
• the hydroxyalkylamines also enhance the antioxidant properties of the additive and auxiliary textile compositions according to the invention, resulting in an increased capacity for preserving the dye affinity and the mechanical properties of the textile fibers.
• These compounds must be capable of being dissolved in water, and this is why the compounds in which the alkyl radicals contain at most 5 carbon atoms, that is to say in which n, and optionally n, and / or n 2, are preferred. between 2 and 5 carbon atoms, preferably between 2 and 3.
• Monoethanolamine, (MEA) 3 diethanolamine, triethanolamine will be preferred.
• the additive compositions according to the invention preferably contain from 1 to 15% by weight of one or more hydroxyalkyl amines, or else from 2 to 15%, or from 3 to 10% by weight, preferably from 5 to 10% by weight. more preferably 6 to 9% by weight of one or more hydroxyalkylamine.
• These compounds are wetting agents used in particular in various textile treatment operations (washing, mercerizing, bleaching), and allowing: the perfect "wetting" of the textile material emulsification of lipophilic impurities - the dispersion of insoluble substances and various degradation products.
• the anionic surfactants (b) according to the invention also participate in the antioxidant properties of the additive and auxiliary textile compositions according to the invention.
• the compounds (b) according to the invention are chosen from alkyl sulphates, alkyl sulphonates, alkylaryl sulphonates, alkyl ether phosphates and alkyl carboxylates.
• the alkyl groups of these surfactants comprise from 8 to 22 carbon atoms, preferably from 8 to 18 or from 10 to 18 carbon atoms, they are preferably paraffinic. Paraffin sulfates, sulfonates, especially lauryl are preferred.
• alkali and alkaline earth metal salts in particular sodium, or magnesium.
• compositions according to the invention preferably contain from 10 to 50% by weight of one or more surfactants (b), or from 15 to 40% by weight, or from 20 to 40% by weight, even more preferably from 25 to 35% by weight.
• Compounds (c): thioureas, of formula R 1 R 2 N (CS) NR 3 R 4 , where R 1, R 2 , R 3 , R 4 are either hydrogen or hydrocarbon radicals may play a role in the prevention of the oxidation phenomenon.
• preference will be given to the thioureas in which R 1 , R 2 , R 3 and R 4 are either hydrogen or hydrocarbon radicals comprising from 1 to 5 carbon atoms.
• EDTA ethylene diamine tetraacetic acid
• NTA niotrilotetraacetic acid
• DTPA diethylene triamine pentaacetic acid
• phosphonic and gluconic acids phosphonates, gluconates, polyacrylates.
• NTA, EDTA, DTPA are particularly preferred.
• compositions according to the invention represent from 2 to 10%, preferably from 3 to 7%, even more preferentially from 4 to 5% by weight.
• the respective proportions of sequestering agent and thiourea may vary, in particular depending on the nature of the thioureas, in the compositions (c).
• the content of sequestering agent is of the order of 0.2 to 2% in the additive compositions according to the invention.
• these thioureas can be totally or partially substituted by compounds (d) as wetting agents and antifreezes.
• the wetting agents contained in these compositions (d) are dialkyl sulphosuccinates of formula:
• R 6 and R 7 are alkyl groups containing from 6 to 22 carbon atoms, preferably from 6 to 12 carbon atoms.
• alkali metal and alkaline earth metal salts are preferably alkali metal and alkaline earth metal salts, preferentially sodium salts.
• compositions (d) are alcohols such as methanol or isopropanol, glycols, for example glycerol, or glycol ethers, denoting ethers of ethylene glycol or propylene glycol.
• glycol ethers of the composition (d) have the formula: RO- (CH 2 -CH (X)) n 3 -O-R ', with X being either a hydrogen atom or a CH 2 , R group, R 'being carbon chains comprising between 1 and 5 carbon atoms, and n 3 is an integer between 1 and 10, preferably 1 and 5, preferably 1.
• glycol ethers mono ethylene glycol or mono propylene glycol ethers will be preferred.
• the compounds (d) represent from 1 to 15%, preferentially from 2 to 12%, even more preferably from 3 to 5% by weight.
• dialkyl sulfosuccinate and antifreeze may vary in the antioxidant compositions (d).
• mass percentages of these compounds in the additive compositions according to the invention are identical.
• Active substance and solution or aqueous emulsion Active substance and solution or aqueous emulsion:
• compositions according to the invention contain, as active ingredient, compounds (a), (b), (c) and / or (d). They may also contain as additives any compounds other than water, suitable for their use, for example anti foam.
• compositions are intended to be applied in the form of an aqueous solution or an aqueous emulsion. It will be preferred to formulate the compositions according to the invention with compounds which are soluble in water.
• compositions according to the invention are concentrates of active material slightly diluted in water. They can thus contain less than 75% by weight of water, preferably 10 to 70%, or 50 to 60% of water, or 55 to 60% by weight of water.
• Textile auxiliaries preferably 10 to 70%, or 50 to 60% of water, or 55 to 60% by weight of water.
• the textile auxiliaries according to the invention are prepared by dilution in water of the concentrated active material compositions described above.
• the said compositions can be diluted so that the total amount of water represents more than 75% by weight of the textile auxiliary, preferably from 95 to 99% by weight.
• the textile auxiliaries according to the invention comprise a total amount by weight of active material represented by the compounds (a), (b), (c) and / or (d) which ranges from 0.2% to 25% preferably from 1% to 5%.
• the textile auxiliaries described above are used as a dye unison agent, or to preserve the mechanical properties and the dye affinity of textile fibers, yarns, fabrics or knits made of said fibers. Use as a dye unison agent:
• Unison agents are a class of textile auxiliaries well known to those skilled in the art whose function is to ensure even distribution of the colorant within the fiber. A lack of unison is reflected for example by the presence, on the same piece of fabric or tinted knit, different coloring areas of intensity, stains, streaks, uneven coarse dye is of no commercial value and difficult to correct.
• the mechanical properties in question here are the toughness and the elongation at break, described in detail in the examples below and which has been observed that the deterioration, during heat treatments, causes dyeing defects. They are measured on wires according to the UNI EN ISO 2026 standard.
• the mechanical properties of the textile yarns previously treated with the textile auxiliaries according to the invention are not affected by the heat treatments, in particular carried out at temperatures of the order of 170 to 210 ° C., preferably of the order of 180 to 200 ° C. 0 C. Use to preserve the dye affinity upon heat treatment:
• a low dye affinity of textile fibers for dye results in yarns, fabrics or knits of a lighter shade than desired.
• the dye affinity of textile fibers, yarns, fabrics, knits made of textile fibers previously treated with the textile auxiliaries according to the invention is not affected by the heat treatments, in particular carried out at temperatures of the order of 170 to 210 ° C, preferably of the order of 180 to 200 ° C.
• the textile fibers can be of natural plant origin, for example linen, cotton, jute, hemp, or of animal origin, Alpaca, Angora, cashmere, wool, silk, ...
• a synthetic textile fiber is a crystalline polymer obtained after passing through a die. It is obtained by extrusion of polymer granules obtained from hydrocarbons or starch.
• fibers can be obtained from polylactic acid polymer, acrylic polymers, polyamide fibers, aramid fibers (aromatic polyamide) chlorofibres obtained from PVC, polyurethane fibers, elastane fiber (lycra) obtained from polyurethane, polyester fiber, polyethylene, polyphenolic, ...
• textile auxiliaries according to the invention relates to textile fibers and continuous yarns, more particularly synthetic textile fibers, in particular those having problems of degradation of their mechanical properties and of their dye affinity to heat.
• a particularly preferred use relates to textile fibers and continuous filaments of polyamides, or of polyamide derivatives, for example aramidic derivatives.
• the aliphatic polyamides are generally designated by numbers relating to the number of carbon atoms contained in the repeating unit of the polymer.
• PA 6, PA 11, PA 12 denote polyamides obtained by polymerization of an amino acid or a lactam with 6, 11 or 12 atoms, respectively. carbon in the pattern, or PA 6.6, PA 4.6, PA 6.10, PA 6.12, the polyamides obtained by polycondensation of a diacid and a diamine.
• the first number corresponds to the number of carbon atoms of the diamine while the second corresponds to the number of carbon atoms of the diacid.
• the aromatic polyamides do not use a precise designation rule.
• PAA polyarylamide
• PPA polyphthalamide
• polyamide textile fibers there is mainly nylon, or polyhexamethylene adipamide or PA 6/6 fiber.
• Kevlar refers to a category of synthetic fibers from aromatic polyamides. The best known is obtained from poly para phenylenediamine, which can be found for example under the trade name Kevlar and Twaron. Other aramidic textile fibers, for example poly meta phenylene diamine, can also be found. Son
• Natural fibers which have lengths of the order of 40 to 80 mm, are transformed into yarn in spinning mills.
• the polymers are directly extruded as yarns into the dies.
• textile auxiliaries according to the invention are particularly suitable for such textiles obtained from such son containing elastane, and which require a heat treatment of dimensional fixation.
• the uses according to the invention are suitable for textiles containing up to 40% by weight of elastane, preferably up to 25%.
• Textiles broadly refer to materials obtained from textile yarns: fabrics, knits, nonwovens.
• Knitwear Knit is an extensible fabric with intertwined loops which can also be described as mesh II and is different from other textiles usually made of a weaving of warp threads and weft threads as it consists of a single thread wrapped around itself often with a knitting needle. All textile fibers can be knitted. The production of knit is also referred to as hosiery.
• textile auxiliaries according to the invention are particularly suitable for knits which, because of their extensible nature, require dimensional fixing heat treatments, more particularly to knits containing fasthanene.
• textile auxiliaries according to the invention will be preferred for knits combining polyamide and elastane, in particular those containing from 0.1 to 25% of elastane.
• An object of the present invention also relates to methods of treatment, more precisely pretreatment of yarns, fabrics or knits using the textile auxiliaries according to the invention described above.
• the methods according to the invention are intended to improve the unison of dyeing knits or fabrics consisting of textile fibers, or to preserve their mechanical property or dye affinity during heat treatments.
• An expressing step so as to deposit on the surface of the son, fabrics or knits the amount of active ingredient (a) + (b) + (c) and / or (d) required.
• this amount of active material is between 0.1 and 5% by weight, preferably between 1 and 4%, more preferably between 2 and 4% by weight of active ingredient (a) + (b) + (c) and / or (d) based on the weight of yarn, fabric or dry knit.
• the squeezing rate which designates the mass percentage of textile auxiliary evacuated with respect to the weight of yarn or dry fabric, or its complement, the rate of weight, which represents the weight percentage of textile aid retained in relation to the weight of yarn or dry fabric.
• the yarns, fabrics or knits When the process is continuous, the yarns, fabrics or knits typically scroll in the pad of padding at speeds of the order of 1 to 20 meters per minute, in tanks or during a residence time of the order of a few seconds a few tens of seconds, typically less than 1 minute.
• the wringing operation is carried out by squeeze rolls whose spacing is adjusted so as to deposit the desired amount of active material on the yarns, fabrics and knits.
• the fibers, fabrics or knits thus pretreated are then subjected to a heat treatment, possibly followed by dyeing.
• the pretreatment method according to the invention does not interfere with conventional treatment processes and does not require any specific modification. Examples
• Exent 1 Degradation of the mechanical properties of polyamide yarns after dimensional stabilization heat treatment, correlation with loss of dye affinity.
• Each batch was heat-treated for dimensional stabilization at 185 ° C, and then dyed with the same metalliferous dye.
• Toughness and elongation at break are measured according to UNI EN ISO 2026, with a Hounsfield H5KS dynamometer.
• the decitex value of the yarn is obviously not affected by the heat treatment, the minimal variations correspond to the repeatability of the method and to the fluctuations of the production process. On the other hand, it is found that the tenacity of the yarn and the elongation is systematically lower, within the same batch, for the yarn parts which gave, under the same dyeing conditions, a "lighter" coloring. .
• the tenacity of the "regular" yarns are 4%, 13%, 15%, 15.5%, 19% higher than those of the "lighter" yarns for the respective batches 1, 2, 3, 4 and 5.
• the elongations of the "regular" yarns are 11%, 10.5%, 14.5%, 26% and 33% respectively higher than those of the "lighter" yarns for the batches 1, 2, 3, 4 and 5.
• Example 2 Influence of the pretreatment according to the invention on the mechanical properties and the dye affinity. No pretreatment:
• a batch of polyamide yarn PA6-6, 44 decitex, consisting of 48 filaments is considered. This yarn was knitted with 3-filament spandex yarn to make a knit fabric containing 20% elastane (batch 6).
• This batch was the subject of a customer feedback following dyeing defects found with an acid dye of dark purple color with which it is particularly problematic to obtain a sustained and uniform dyeing on polyamide knits subjected to heat treatment.
• the customer return concerns part of lot 6 having undergone the following operations:
• the knit is passed through a padding bath containing only water and is then spun between two squeeze rolls.
• the knit is then dyed with the dye on a JET device.
• the spacing of the squeezing rollers at the outlet of the padding tank has been adjusted so that the load-bearing rate of the knitting material is of the order of 60%, which represents a deposition of active material (excluding water) of the 3.5 g / 100 g of dry knit.
• the sample thus treated is of industrial size. It represents approximately 500 kg of treated thread. The entire sample showed a uniform appearance and a color with the required intensity after dyeing (regular).
• compositions according to the invention make it possible to preserve the dye affinity of the fibers and to improve the unison of dyeing.
• Downstream treatment with a composition according to the invention :
• This last knit (lot 7) is made with a polyamide yarn from the same reel as that of lot 6, but it has, contrary to that of lot 6, previously undergone a heat treatment at the time of shaping ( texturing).
• the result after dyeing is a knit of a shade much too light, despite the treatment with the composition according to the invention, applied before the dimensional stabilization heat treatment but after heating during texturing.
• compositions according to the invention therefore do not make it possible to restore the mechanical properties and the dye affinity of polyamide fibers already heat-treated.
• a treatment with these compositions must be applied in the form of pretreatment upstream of the heat treatment.
• Example 2 The pretreatment of Example 2 was reproduced with a composition C2 according to the invention containing:

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• 2008
  • 2008-05-13 FR FR0802572A patent/FR2931172B1/fr not_active Expired - Fee Related
• 2009
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