Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
  • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
  • C08G65/32—Polymers modified by chemical after-treatment
  • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
  • C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
  • C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
• • 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
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/53—Polyethers

Definitions

• the present invention relates to a method of producing a bundled synthetic fiber multifilament yarn, and more particularly the invention has for its object the production of a bundled multifilament yarn having excellent properties as warps for weaving.
• a preparatory step is required wherein the warp yarn is first sized and then warped or is sized after warping.
• the object of such sizing is to give bundling properties and wear resistance to the yarn, to make the adhesion between individual filaments sufficient, and to make the yarn sufficiently resistant to shock, friction and tension during weaving so that the weaving efficiency is improved.
• pastes which have film-forming ability or adhesiveness. They are, for example, polyvinyl alcohol, esters of polyacrylic acid, sodium polyacrylate, polyacrylic acid, polyacrylamide, etc.
• the method of the present invention obviates various such difficulties encountered in the conventional sizing step, and moreover simplifies the process by incorporating a sizing step into the yarn producing step.
• the method of the present invention is characterized in that a random copolymer of ethylene oxide and propylene oxide esterified with rosin is fixed or depositcd singly or together with a lubricating agent, emulsifier, antistatic agent. etc., to an unstretched or stretched synthetic fiber multifllament yarn, and particularly in that the extruded multifilament yarn is treated in the spinning step with an oiling agent containing 5 weight percent of the above-mentioned treating agent based on the total weight of the non-aqueous components,
• the random copolymers of ethylene oxide and propylene oxide esterified with rosin to be used in the method of the present invention either monoester or diester may be used.
• the term rosin refers to a natural resin mainly composed of abietic acid, which additionally contains pimaric acid, sabinic acid, etc.
• the average molecular weight of the random copolymers of ethylene oxide and propylene oxide is preferably within the range of 5,000 to 20,000.
• the ratio off ethylene oxide to propylene oxide is not required to be particularly limited, but 50 mol percent of ethylene oxide is preferred. When ethylene oxide is less than 50 mol percent, it is difficult to compound such a copolymer into an emulsion, and when ethylene oxide is in excess of 85 mol percent the viscosity of the resulting emulsion becomes considerably high, so that such a copolymer is not desirable.
• the treating agent of the present invention by reacting a random copolymer of ethylene oxide and propylene oxide with rosin, it is desirable to take the molar ratio of the copolymer and rosin so as to be 1:05 3.0. if rosin is less than 0.5 mol percent, the treated yarn will have seriously inferior hundling properties, and on the other hand when rosin is in excess of 3 mol percent, the obtained yarn will have good bundling properties, but its smoothness becomes remarkably poor and it is liable to generate static electricity.
• the reaction product besides the above-mentioned random copolymer rosin ester, unreacted random copolymer and rosin are present together. However, the reaction product may be used without particularly separating the unreacted materials. The unreacted rosin may be converted into an alkali metal salt thereof.
• Yarns treated with such a treating agent of the present invention have a high degree of bundling properties and a high degree of wear resistance as well as a proper degree of smoothness, with the quality of the yarns being further stabilized. Therefore, the yarn obtainable by the present invention are provided with necessary characteristics as warps for weaving so that the yarn may be exempted from a separate sizing step before weaving.
• the treating agent of the present invention is applied to an unstretched yarn, the treated yarn will have an extremely good stretchability so that entangling of the yarn about rollers or yarn breakage during the production step is few in comparison with the yarn treated with a conventional oiling agent, and fluff of the stretched yaarn becomes markedly reduced.
• the treating agents of the present invention may be thus applied to the yarn together with an oiling agent in the spinning step or may be applied upon stretching or after stretching.
• the ratio of the treating agent of the present invention to the general oiling agent be set within the range of 10:0 5:5.
• the treating agent of the present invention be fixed to the yarn in an amount of more than 0.1 weight percent based on the fiber weight.
• the total fixed amount of the oiling agent and the treating agent of the present invention is desirable to be small such that it is less than 2 weight percent based on the fiber weight.
• a fixed amount of less than 2 weight percent based on the fiber is not sufficient for the sized yarn to have an effect as sized yarn. But with the use of the treating agent of the present invention, and a small amount is able to give sufficient bandling properties and wear resistance to the yarn.
• the multifilament yarn obtainable by the method of the present invention is most suitable as warps for weaving.
• it is removed from the defects of the conventional sized yarn, such as paste-fall and gum-up.
• the sizing step can be omitted.
• the method of the present invention results in good weaving efficiency, few flufff generation during wearing, and improvement in shedding movement.
• the small fixed amount of the treating agent contributes to the prevention of paste-fall and gum-up and to the quality improvement of the resulting fabrics.
• EXAMPLE 1 An unstretched multifilament yarn of nylon-6 obtained by melt-spinning, after being unwound from a pirn and prior to entering the stretching zone, was applied with the treating agents Nos. 1 4 shown in Table 1 according to the method of the present invention. Immediately after this'treatment, the yarn was stretched to obtain a nylon-6 multifilament yarn of 70 denier/14 filaments.
• Each of the treating agents was used as an aqueous emulsion in concentration of 10 which contained 80 of a treating agent of the present invention, 10 of a mineral oil, 5 of a higher fatty acid ester, and 5 71. of a polyoxyethylene nonionic surface active agent, and as an antistatic agent an alkyl phosphate metal salt was added in an amount of 8 based on the non-aqueous components.
• propylene oxide 25 mol random copolymer (mol. wt. 12,000) rosin diester 2.
• propylene oxide (25 mol random copolymer (mol. wt. 12,000) rosin monoester 3.
• Ethylene oxide mol 1.07 wt.
• the rank B represents a sample having a number of divided filaments from 6 to 9, a divided height from 50 to mm., and a divided width from 5 to 10 mm.
• the rank C represents a sample having a number of divided filaments more than 10, a divided height more than 100 mm., and a divided width more than 10 mm.
• a test sample 50 cm. in length, is fixed at one end, and a weight of 50 grams is suspended at the other end. The sample is rubbed at the middle point with a blade traversing horizontally.
• the rank C is the case where fluff is generated within 5 minutes.
• the rank B is the case where fluff is generated in 5 10 minutes, and the rank A is the case where no fluff is generated after 10 minutes.
• the yarn is made to travel over a rubbing rod at a contact angle of 90.
• the travelling tension of the yarn before passing the rubbing means at a travelling speed of I00 m/min. is fixed constant at 10 grams, and the tension after passing the rubbing means is measured. When this value is less than 1.2, it is ranked as Good," when that of Comparative Example 2 is taken as l.
• the yarn obtained by the method of the present invention represents a high degree of bundling properties and a high degree of wear resistance as well as a proper degree of smoothness, while the conventional PVA type sizing agent does not show any effect as a bundling agent at the same fixed amount as the treating agent of the present invention, the effect obtained being substantially equal to that obtained in the case of using a spinning oil only.
• EXAMPLE 2 1n the spinning step of a nylon-6 multifilament yarn of 70 d/14 f., oiling agents each containing 100 weight percent, 70 weight percent, 40 weight percent and 10 weight percent of the ethylene oxide (75 mol %)-propylene oxide (25 mol random copolymer rosin diester were respectively applied to the extruded yarn as an aqueous emulsion in concentration of 15 by means of oiling rollers.
• the oiling agent components other than the rosin ester were 50 weight percent of a mineral oil, weight percent of a higher fatty acid ester, and 30 weight percent of a polyoxyethylene type nonionic surface active agent, to which, as an antistatic agent, the same one as used in Example 1 was added in an amount of 7 based on the nonaqueous components.
• the fixed amount was controlled such that the amount of the rosin ester was more than 0.1 weight percent. Too high a total fixed amount generated dirt on drawtwisters. Also, as seen in the above table, too large an amount of the rosin ester in the treating agent lowered the smoothness and increased generation of fluffs. Accordingly, when the treating agent of the present invention is applied together with an oiling agent in the spinning step, it is necessary that the ratio of the treating agent to the oiling agent be adjusted to 5/95 /30, preferably 10/90 50/50.
• a method of producing bundled multifilament yarn which comprises depositing a rosin ester of a random copolymer of ethylene oxide and propylene oxide on the surface of a synthetic fiber multifilament yarn in an amount of more than 0.1% by weight based on the weight of the yarn, said random copolymer having an average molecular weight of 5,000 to 20,000 and wherein the ratio of ethylene oxide to propylene oxide in the copolymer is 50-85 mol of ethylene oxide to l5-50 mol of propylene oxide.
• a method of producing bundled mutifilament yarn which comprises melt-spinning the yarn and then treat ing the yarn with an aqueous emulsion of an oily agent in combination with a rosin ester of a random copolymer of ethylene oxide and propylene oxide in an amount of 570% based on the weight of non-aqueous components, said rosin ester being used in an amount of more than 0. l based on the weight of the yarn; and wherein the average molecular weight of the random copolymer is 5000 to 20,000 and the ratio of ethylene oxide to propylene oxide in the copolymer is 50-85 mol of ethylene oxide to 15-50 mol of propylene oxide.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• General Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Treatment Of Fibers During Manufacturing Processes (AREA)

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Cited By (6)

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• 1973
  • 1973-03-10 JP JP2819973A patent/JPS5335640B2/ja not_active Expired
• 1974
  • 1974-03-11 GB GB1085574A patent/GB1430879A/en not_active Expired
  • 1974-03-11 US US450240A patent/US3899614A/en not_active Expired - Lifetime

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