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
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
• • 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
  • D06M7/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made of other substances with subsequent freeing of the treated goods from the treating medium, e.g. swelling, e.g. polyolefins
• • 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
  • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
  • D06M2200/40—Reduced friction resistance, lubricant properties; Sizing compositions

Definitions

• the present invention relates to a novel composition based on water-soluble high molecular weight acrylamide (co) polymers for sizing textile threads (or fibers).
• the invention is particularly applicable to the sizing of natural fibers, especially cotton type, possibly in the presence of artificial fibers, especially polyester.
• abrasion the action of using friction. There is ruffling of threads, formation of pilling due to friction on different pieces (lamellae, comb teeth ...), and hairiness: the tendency of the ends of the fibers to move away from the body of the yarn. It will cause interfering bridging that will give wire breaks or insertion faults by the frame vector.
• the sizing must not degrade the wire and the bath must be composed only of compatible products. Furthermore, there should not occur sizing deposits on the comb, which by hardening, could act as abrasives on the son.
• the sizing is an intermediate primer, which is eliminated following the weaving operation. It is an operation prior to the finishing of the fabric, after which the gluing is completely eliminated. This can prove to be very polluting due to the discharges generated. It is therefore interesting to have a product having good solubility for desizing.
• EP-A-262 945 and US Pat. No. 6,736,865 describe treatment products, not of individualized threads, but of finished woven fabrics.
• EP-A-262 945 thus describes a product combining an acrylamide polymer in the presence of other types of polymers to allow the fixing of the color on the previously woven fabric.
• US 6,736,865 discloses an acrylamide-based product in the presence of other components for treating finished textiles to provide wrinkling resistance and dimensional stability, especially at the time of color fixation.
• the document JP 60 258244 describes the possibility of rendering hydrophobic a sheet being formed, by treatment of papermaking fibers (and non-textile fibers) by means of a mixture of a ketene with an acrylamide polymer .
• the choice of sizing depends mainly on the nature of the chain, taking into account also the type of weaving:
• the main types of base products that can be used as sizing agents are natural or synthetic polymers which are classified as follows: - Starchy foods: starches, starches, etc.
• starch derivatives ethers, acetates ...
• cellulosic derivatives carboxymethyl, methyl and ethyl cellulose
• polyesters - acrylics they are especially suitable for synthetic and artificial yarns; but they are also found in combination with starches or cellulosics for natural fibers and mixtures thereof.
• Acrylic-type sizing agents are obtained by homopolymerization or copolymerization of different derivatives of acrylic acid or methacrylic acid with other monomers such as styrene, vinyl acetate, acrylamide, etc.
• macromolecular substances are obtained by synthesis, the physical properties of which can be varied within a very wide range. This explains the many applications in sizing different threads: polyamide, polyester, cellulosic. The main properties they bring are:
• the problem is therefore to find a new gluing product that would glue the natural fibers and / or artificial, on dry looms, and meets the requirements of the industry, that is to say: good affinity with the yarns or fibers, easy implementation (sizing speed %), improvement of the efficiency of the looms: increase of the resistance of the yarns or fibers while limiting the phenomenon of clogging of the combs,
• a sizing bath has now been found for natural and / or artificial textile fibers in the form of an aqueous solution having performance at least as good as that of pre-existing compositions but at significantly lower sizing agent dosages.
• the subject of the present invention is firstly a temporary sizing agent for naturalized and / or artificial individualized textile fibers, in particular of the cotton and / or cotton / polyester type, characterized in that it comprises a water-soluble homopolymer or copolymer of at least one acrylamide monomer having a molecular weight of at least 1 million, advantageously greater than 3 million.
• the sizing agent consists exclusively of a homopolymer or copolymer of acrylamide.
• the sizing agent of the invention is especially obtained by polymerization (or respectively copolymerization, together throughout the text and claims: "polymerization") of at least one nonionic monomer acrylamide type and possibly other ionic monomers, and advantageously has a UL viscosity greater than 3.
• the polymers of the invention do not require development of a particular polymerization process. They can be obtained by any of the polymerization techniques well known to those skilled in the art (solution polymerization, gel polymerization, precipitation polymerization, emulsion polymerization (aqueous or inverse) followed or not by a spray drying step, suspension polymerization, micellar polymerization followed or not by a precipitation step).
• the water-soluble (co) polymer serving as sizing agent is obtained from:
• anionic and / or cationic preferably 0 to 5 mol%, in the presence or absence of a branching agent and optionally a transfer agent.
• ionic monomers that can be used: cationic monomers: dialkylaminoalkyl (meth) acrylate, dialkylaminoalkyl (meth) acrylamide, diallylamine, methyldiallylamine and their quaternary ammonium or acid salts ...
• anionic monomers having a carboxylic function (eg acrylic acid, methacrylic acid, and their salts 10), the monomers having a sulphonic acid function (eg 2-acrylamido-2-methylpropanesulphonic acid (AMPS) and their salts ...) ...
• branching agents methylene bisacrylamide (MBA), ethylene glycol di-acrylate, polyethylene glycol dimethacrylate, diacrylamide, cyanomethylacrylate, vinyloxyethylacrylate or methacrylate and formaldehyde, glyoxal, glycidyl ether type such as ethylene glycol diglycidyl ether, or epoxy or any other means well known to those skilled in the art for crosslinking.
• MBA methylene bisacrylamide
• ethylene glycol di-acrylate polyethylene glycol dimethacrylate
• diacrylamide diacrylamide
• cyanomethylacrylate vinyloxyethylacrylate or methacrylate and formaldehyde
• glyoxal glycidyl ether type
• epoxy any other means well known to those skilled in the art for crosslinking.
• the invention also relates to a sizing bath comprising the sizing agent described above in a proportion of less than 2% by weight of dry matter, preferably less than 1.5% by weight.
• the present invention also relates to a sizing / de-bonding process of natural and / or artificial textile fibers consisting of immersing said fibers in the bath described above, then, after weaving, to de-stick the fibers using hot water only.
• the concentration of the sizing agent in the bath may vary within the range described above, taking into account the equipment used for carrying out the sizing cycle, in particular the squeezing power of the rolls, and the amount of glue that we want to raise on the son. It is known that this depends on the one hand on the strength of the yarns which is itself a function of their texturing, their degree of torsion, the number of strands per unit yarn and, on the other hand, the adhesion capacity. from the sizing agent to the son to be treated.
• compositions of the invention give coatings having a good protective power and a high adhesive power to textile yarns of cotton and polyester / cotton type; as a result, a concentration of less than or equal to 2% by weight, preferably less than 1.5%, of the composition is sufficient for all the cases of application, including the most difficult son to glue.
• a deposit representing a larger quantity is perfectly conceivable but it does not bring real benefits and can even be detrimental.
• Glued string yarns under the conditions of the invention have sufficient strength for subsequent dry weaving operations.
• the unitary strands are properly agglomerated and there is no evidence of scuffing and breaking wires or fouling looms.
• the desizing step according to the invention is typically carried out with hot water. We then finish with a drying.
• the sizing compositions according to the invention can be prepared either well before their use for sizing and be stored, or on the contrary immediately before use, from their constituents.
• ADC dimethylaminoethyl acrylate quaternized by methyl chloride
• the UL viscosity is measured using a Brookfield viscometer (UL type module) at a speed of 60 rpm and at a temperature of 25 ° C. on a saline (1 N NaCl) polymer at 0.1% concentration (dry weight).
• the composition is then ready to be used to form a sizing bath.
• This bath is immersed in various chains of threads, which are wrung out by passing between two rolls and then dried.
• the weavings made from the son described above are made in good conditions without stripping or strand breakage.
• the fabric After weaving, the fabric is treated off by unwrapping it in a bath of hot water at 50 ° C. and then dried (desizing operation).
• the finished, dried fabric was very flexible; it showed, in addition, a excellent color homogeneity and good fastness to washing and light.
• a sizing was carried out under conditions strictly identical to the previous ones but using the sizing products currently on the market of types - homopolymer of sodium acrylate (MW: 800,000 and 350,000) and homopolymer of acrylamide ( MS: 800,000 and 350,000).
• the high molecular weights of the water-soluble acrylamide (co) polymers of the invention give the sizing bath: a marked improvement in the conditions of use: a preparation and easy desizing as well as a reduced kinematic viscosity of the bath (viscosity cuts), and a highly developed sizing efficiency, thereby significantly limiting the concentration of bath application compared to that required for products. of the same chemical nature and of lower molecular weight.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2004
  • 2004-12-22 FR FR0453145A patent/FR2879630B1/fr not_active Expired - Fee Related
• 2005
  • 2005-12-16 WO PCT/FR2005/051098 patent/WO2006070147A2/fr not_active Ceased
  • 2005-12-16 EP EP05847578A patent/EP1828470A2/de not_active Withdrawn
  • 2005-12-16 US US11/722,385 patent/US8007678B2/en not_active Expired - Fee Related
  • 2005-12-16 MX MX2007007593A patent/MX2007007593A/es active IP Right Grant

Non-Patent Citations (1)

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