Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/18—Other fabrics or articles characterised primarily by the use of particular thread materials elastic threads
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
  • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
  • D04B21/18—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating elastic threads
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/04—Heat-responsive characteristics
  • D10B2401/041—Heat-responsive characteristics thermoplastic; thermosetting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3065—Including strand which is of specific structural definition
  • Y10T442/313—Strand material formed of individual filaments having different chemical compositions

Definitions

• the present invention relates to a woven or knitted fabric using a mixture of a polyurethane elastic fiber and another fiber, and a method for producing the same. More specifically, the fabric made from the woven or knitted fabric is repeatedly deformed and stretched while worn, resulting in "deformation, misalignment, and softness” of the fabric, and so-called “fraying" in which the yarn comes off from the cut portion.
• the present invention relates to a woven or knitted fabric mixed with polyurethane elastic fibers and a method for producing the same.
• the method of reducing the elongation ratio of polyurethane elastic fiber as in (1) reduces the elasticity of the fabric and increases the cost due to the increase in the amount of polyurethane elastic fiber used.
• the method of (1) and (ii) increasing the set temperature to reduce the shrinkage of the polyurethane elastic fiber is not preferable because it causes a change in the texture of the mating fiber and a reduction in the color fastness of the woven or knitted fabric. .
• problems such as curling and slip-in can be prevented by a method of fusing viscous fibers.
• an elastic fiber that fuses at a low temperature as in (3) can be used, it can be fused at a low set temperature of 140 to 160 ° C.
• the use of special composite yarns or special knitting methods as in (4) and (5) limit the properties of the product.
• the present invention provides an elastic fiber in which the used polyurethane elastic fiber and non-elastic yarn do not come off from the cut or sewn portion, and the fabric is stable, and misalignment, softness, fraying, orchids, densen, and Karl Slipin are unlikely to occur.
• An object of the present invention is to provide a woven or knitted fabric and a method for producing the same. Disclosure of the invention
• the present inventors have conducted intensive studies in order to achieve the above-mentioned object, and as a result, obtained by, for example, melt-spinning a polymer synthesized from a prepolymer obtained by reacting a polyol and a disocyanate, and preferably based on the total amount of the raw material polyol. 50 mass of polyether polyol.
• melt-spinning a polymer synthesized from a prepolymer obtained by reacting a polyol and a disocyanate, and preferably based on the total amount of the raw material polyol. 50 mass of polyether polyol.
• the present invention provides the following woven / knitted fabric mixed with polyurethane elastic fibers and a method for producing the same.
• At least one fused polyurethane polyurethane fiber having a strong retention of 50% or more after a dry heat treatment at 150 ° C for 45 seconds in a state of being stretched by 100% and a melting point of 180 ° C or less; After forming a woven or knitted fabric using various types of inelastic yarns, dry or hot heat setting is performed to form a high-fusion polyurethane elastic fiber with each other or at the intersection of the non-elastic yarn and the high-fusion polyurethane elastic fiber.
• Figure 1 is an example of the organization chart of the knitted fabric.
• Figure 2 is an example of the organization chart of the knitted fabric.
• Figure 3 is an example of an organization chart of a warp knitted fabric.
• Figure 4 is an example of an organization chart of a warp knitted fabric.
• FIG. 5 is an example of an organization chart of a warp knitted fabric.
• FIG. 6 is an example of an organization chart of a warp knitted fabric.
• FIG. 7 is an example of an organization chart of a warp knitted fabric.
• FIG. 8 is an example of an organization chart of a warp knitted fabric.
• FIG. 9 is an example of an organization chart of a warp knitted fabric.
• Fig. 10 shows a test specimen for a tensile test of a warp knitted fabric.
• the polyurethane elastic fiber used in the present invention is easily fused even at a low temperature and has high heat resistance and is a highly fused polyurethane elastic fiber
• its composition and production method are not particularly limited. Reacting a polyol with an excess molar amount of diisocyanate to produce a polyurethane intermediate polymer having isocyanate groups at both ends, and a low molecular weight diamine having active hydrogen capable of easily reacting with the isocyanate group of the intermediate polymer.
• a polyurethane solution (polymer solution) by reacting a low molecular weight diol in an inert organic solvent
• the solvent is removed to form a yarn, or a polyol and a diisocyanate are mixed with a low molecular weight diamine or a low molecular weight diol.
• removing the solvent and forming it into yarn A method in which the solidified polymer is formed into a yarn by heating without dissolving in a solvent; a process in which the polyol, diisocyanate, and low-molecular-weight diol are reacted to obtain a polymer, and the polymer is formed into a yarn without solidification.
• a solvent is removed from the mixed polymer solution to form a yarn.
• a double-ended isocyanate mono-group prepolymer obtained by reacting a polyol and a di-isocyanate hereinafter referred to as a “double-ended NCO-group prepolymer”
• B a polyol, a diisocyanate and a low molecular weight
• the polyols constituting the prepolymers of the components (A) and (B) may be the same or different, but a polymer diol having a number average molecular weight of about 800 to 3,000 Preferably, it is used.
• polystyrene diol examples include polyether glycol, polyester dalericol, and polycarbonate daricol.
• Polyether glycols include, for example, those obtained by ring-opening polymerization of cyclic ethers such as ethylene oxide, propylene oxide, and tetrahydrofuran.
• Ether diole ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanedio ⁇ "nore, neopentinole glycolone, 1,6-hexanediol, 3-methyl-1,5- Examples thereof include polyether daricol obtained by polycondensation of glycols such as pentanediol.
• Polyester glycols include, for example, ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, neopentinole glycolone, 1,6-hexanediole, and 3-methylinole 1,5-pentanediol.
• Polyester glycol obtained by polycondensation of at least one selected from dalicols and at least one selected from dibasic acids such as adipic acid, sebacic acid, and azelaic acid; lactones such as prolactatone and valerolactone; Examples thereof include polyester dalicol obtained by ring-opening polymerization of tons.
• polycarbonate glycol examples include at least one selected from the group consisting of dialkyl carbonates such as dimethyl carbonate and methyl carbonate; anoalkylene carbonates such as ethylene carbonate and propylene carbonate; and diaryl carbonates such as diphenylenocarbonate and dinaphthyl carbonate.
• organic carbonates ethylene glycol, propylene dalicol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 1,6_hexanediol, 3-methynole-1,5-pentanediol
• organic carbonates ethylene glycol, propylene dalicol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 1,6_hexanediol, 3-methynole-1,5-pentanediol
• Examples thereof include carbonate glycol obtained by transesterification with at least one kind of aliphatic diol selected from glue and the like.
• polyether glycol polyester glycol, or polycarbonate glycol
• polyester glycol or polycarbonate glycol
• polyether diol component in an amount of 50% by mass or more, preferably 60% by mass or more, based on the polymer diol, and the polyether diol component may be used in an amount of 100% by mass.
• polyether diol component polytetramethylene ether glycol is particularly preferably used.
• the diisocyanates constituting the prepolymers of the components (A) and (B) include aliphatic, alicyclic, aromatic, and the like generally used in the production of polyurethane. Any disocyanate, such as an araliphatic system, can be used.
• Such diisocyanates include, for example, 4,4'-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 1,5-naphthalene diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate. , Isophorone diisocyanate, 1,6-hexamethylene diisocyanate, ⁇ -phenylene diisocyanate, 4,4,1-dicyclohexyl methane diisocyanate, methatetramethyl xylene diisocyanate And paratetramethinolexylene diisocyanate. One of these can be used alone or in combination.
• 4,4′-diphenylmethanediisocyanate, 4,4 ′ 'Dicyclohexylmethane diisocyanate is preferably used.
• the low molecular weight diol or low molecular weight diamine which is a chain extender preferably has an appropriate reaction rate and imparts appropriate heat resistance, has two active hydrogen atoms capable of reacting with isocyanate, and generally has a molecular weight of A low molecular weight compound of 500 or less is used.
• Such low molecular weight diols include, for example, ethylene glycol, propylene glycol cornole, 1,4-butanediole, 1,5-pentanediole, neopentyl dioliconele, 1,6-hexanedioleone, 3-methyldioleone, 5 _ Aliphatic diols such as pentanediol can be used, and trifunctional glycols such as glycerin can also be used as long as spinnability is not impaired. These can be used alone or in combination of two or more. However, ethylene glycol and 1,4-butanediol are preferred from the viewpoint of workability and imparting appropriate physical properties to the obtained fiber.
• a low molecular weight diamine for example, ethylenediamine, butanediamine, propylenediamine, hexamethylenediamine, xylylenediamine, 4,4-diaminodiphenylmethane, hydrazine and the like can be used.
• a low molecular weight diol and a low molecular weight diamine can be used in combination, a low molecular weight diol can be more preferably used as a chain extender in the present invention.
• a reaction regulator or a polymerization degree regulator a monofunctional monoamine such as butanol or the like, or monofunctional amine such as getylamine or dibutylamine may be mixed and used.
• the inert solvent used in the polyurethane polymerization reaction or as the spinning solution includes N, N-dimethylformamide, N, N-dimethylacetamide, N, N, N ', N' — Polar solvents such as tetramethylurea, N-methylpyrrolidone and dimethylsulfoxide.
• Optional components such as UV absorbers, antioxidants, and light stabilizers may be added to the prepolymers (A) and (B) to improve weather resistance, thermal oxidation resistance, and yellowing resistance. it can.
• UV absorbers examples include 2- (3,5-di-t-amyl- 12-hydroxyphenyl) benzotriazole, 2- (3_t-butyl_5_methyl_2-hydroxyphenyl) -15-chlorobenzozotriazole, Examples include benzotriazole-based ultraviolet absorbers such as 2- (2-hydroxy-1,3,5-bisphenyl) benzotriazole.
• antioxidants examples include 3,9_bis (2_ (3- (3-t-butyl-4-hydroxy-15-methylphenyl) -propio-loxy) -1,1,1-dimethylethyl) 1,2,4 , 8,10-Tetraoxaspiro (5.5) pentane, 1,3,5-tris (4-t-butyl-3, hydroxy-2,6-dimethinolevenyl) isocyanuric acid, pentaerythryl-tetrakis [ And hindered phenolic antioxidants such as 3- (3,5-di-t-butyl-1-4-hydroxyphenyl) propionate].
• light stabilizers examples include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-14-piperidyl) sebacate, Examples include hindered amine photo stabilizers such as dimethyl succinate-11- (2-hydroxyethynole)-4-hydroxy-1,2,2,6,6-tetramethylpiperidine condensate.
• the method for obtaining the polyurethane elastic fiber of the present invention is not particularly limited.
• the following three methods are known as a melt spinning method.
• the method of (3) is simpler than the methods of (1) and (2) because there is no process for handling the polyurethane elastic chip, and the spinning rate is adjusted by adjusting the injection ratio of the prepolymer to the reactor.
• This is a preferable method because the amount of residual NCO groups in the polyurethane elastic fiber can be adjusted, and the heat resistance can be improved by a chain extension reaction by the residual NCO groups.
• a low-molecular-weight diol is reacted in advance with a part of the prepolymer, and the OH group-excess prepolymer is supplied to the reactor.
• An injection method can also be used.
• the polyurethane elastic fiber of the present invention is prepared by continuously and quantitatively injecting the prepolymers of the components (A) and (B) into a reactor and melting the obtained polymer for spinning without solidifying. It is particularly preferred to obtain by spinning.
• the synthesis of the polymer for spinning is carried out by (I) synthesis of a prepolymer having N-terminal NCO groups, (II) synthesis of prepolymers having OH groups at both ends, and (III) introduction of these two prepolymers into a reactor. It is composed of three reactions, ie, the synthesis of a spinning polymer that is continuously reacted.
• the composition ratio of the raw materials is the sum of the above three reactions, and the molar amount of all diisocyanates, total polymer diol and total low
• the molar ratio to the total molar amount of the molecular weight diol is preferably from 1.02 to 1.20.
• the above-mentioned N-terminal NCO-based prepolymer of (I) is prepared, for example, by charging a predetermined amount of diisocyanate into a tank equipped with a hot water jacket and a stirrer, and then stirring the predetermined amount of polymer diol while stirring. It can be obtained by pouring and stirring at 80 for 1 hour under a nitrogen purge.
• the NCO-based prepolymer at both ends obtained by this reaction is injected into a polyurethane elastic fiber reactor using a jacketed gear pump (for example, KAP-1 manufactured by Kawasaki Heavy Industries, Ltd.).
• the prepolymer of OH group at both ends of (II) is prepared by charging a predetermined amount of diisocyanate into a tank equipped with a warm water jacket and a stirrer, then injecting a predetermined amount of polymer diol with stirring, and adding the mixture at 80 ° C. It can be obtained by stirring under a nitrogen purge for a period of time to obtain a precursor, and then injecting a low molecular weight diol and stirring to react with the precursor.
• the obtained prepolymer at both ends is injected into a polyurethane elastic fiber reactor using a jacketed gear pump (for example, KAP-1 manufactured by Kawasaki Heavy Industries, Ltd.).
• the spinning polymer (III) can be synthesized by continuously reacting the prepolymers (A) and (B) fed at a fixed ratio.
• the reactor used may be any of those used in the ordinary melt spinning of polyurethane fiber, and the reaction is provided with a mechanism for heating, stirring and reacting the spinning polymer in a molten state, and further transferring the polymer to the spinning head. Machine is preferred.
• the reaction conditions are 1 to 90 minutes at 160 to 220 ° C, preferably 3 to 80 minutes at 180 to 210 ° C.
• the polyurethane elastic fiber of the present invention can be obtained by transferring the synthesized polymer for spinning to a spinning head without solidifying, discharging from a nozzle, and spinning.
• the average residence time depends on the type of reactor and is calculated by the following formula.
• the spinning temperature is 180 to 230 ° C. It can be obtained by continuously extruding through a nozzle, cooling, applying a spinning oil and winding it up.
• the ratio between the polymer and the OH group prepolymer at both ends is determined by adjusting the injection gear pump so that the NCO group remains in the yarn immediately after spinning in an amount of 0.3 to 1% by mass, more preferably 0.35 to 0.85% by mass. It is preferable to adjust the rotation ratio appropriately.
• the content of NCO groups in the spun fibers is measured as follows.
• the polyurethane elastic fiber used in the present invention is particularly preferably a polyurethane elastic fiber produced by melt reaction spinning using polyetherdiol as a main raw material.
• the polyurethane elastic fiber used in the present invention has a tenacity retention of 50% or more, preferably 55% or more after being subjected to dry heat treatment at 150 ° C. for 45 seconds in a 100% stretched state. If the strength retention is lower than 50%, the elasticity of the product after heat setting is undesirably reduced.
• the upper limit of the strength retention is not particularly limited, but is usually 90% or less, particularly 80% or less.
• the melting point of the polyurethane elastic fiber is at most 180 ° C, preferably at most 175 ° C. If the temperature is higher than 180 ° C, the heat treatment temperature for fusing becomes too high, which adversely affects the texture of the product and the color fastness, which is not preferable.
• the lower limit of the melting point should be 150 ° C or higher, and especially 150 ° C or higher, in terms of dimensional stability when mixed with high-melting polyurethane elastic fiber and elongation recovery of fabric. This is preferred.
• the method for measuring the strength retention is as described below.
• the woven or knitted fabric mixed with polyurethane elastic fiber of the present invention uses the above-mentioned high-fusing polyurethane fiber and inelastic yarn, and further contains, for example, a high-melting polyurethane elastic fiber having a melting point of 200 ° C. or more. Having the following structure.
• a woven fabric using a composite yarn containing a highly fused polyurethane elastic fiber and at least one type of inelastic yarn as a warp and a Z or weft The organization is plain weave, twill weave, satin weave, etc. However, shuttle looms, levier looms, air jet looms, and the like can be used as looms. Further, the warp and the weft may all be the composite yarn, or the composite yarn and the non-resilient "raw yarn” may be mixed and used at a driving ratio of 1: 1, 1: 2 or 1: 3.
• the knitting structure of the weft knitted fabric in which the high fusion polyurethane elastic fiber and inelastic yarn are knitted can be any of flat knitting, rubber knitting, pearl knitting, double-sided knitting, or a combination or change of these. Knitting machines can be used, and all knitting machines such as circular knitting machines, flat knitting machines, full fashion knitting machines, and sock knitting machines can be used.
• the high fusion polyurethane elastic fiber may be either braided or braided.
• plating knitting of high fusion polyurethane elastic fiber and inelastic yarn may be used, or composite yarn of high fusion polyurethane and inelastic yarn may be used.
• a high fusion polyurethane elastic fiber may be knitted in all courses, or may be knitted in every other course or more.
• High-fusing polyurethane elastic fibers and inelastic yarns may be alternately or knitted at appropriate intervals.
• a high melting point polyurethane elastic fiber may be mixed. An example is shown below, but the present invention is not limited to this.
• a warp knitted fabric in which highly fused poly-urethane elastic fibers and at least one or more inelastic yarns are mixed can be any structure such as a knitting knit, a denbi knitting, a cord knitting, an atlas knitting, or a combination of these or a structure changed. Knitting machines can be used, and all knitting machines such as tricot knitting machines, Raschel knitting machines, and Miranese knitting machines can be used.
• a high fusion polyurethane elastic fiber may be woven over the entire surface, or may be woven at appropriate intervals. Further, the high fusion polyurethane elastic fiber may be either imported or knitted. Further, a high melting point polyurethane elastic fiber may be mixed. An example is shown below, but the present invention is not limited to this.
• FIG. 1 and FIG. 2 show wedge yarns that are often used for lace ground and the like. This sari tissue is liable to have defects such as run and unravel after cut sewing. As a countermeasure, a run-stopping tissue has been proposed, but traces of the run-stopping tissue remain dirty on the fabric, leaving a problem of hindering luxury. Therefore, in FIGS. 1 and 2, a is a non-elastic raw silk, and b is a braided heat set as a high fusion polyurethane elastic fiber of the present invention, or a high melting polyurethane elastic fiber and high melting polyurethane elastic fiber are aligned. Then, in section X shown in Fig.
• the high fusion polyurethane elastic fiber and the non-elastic yarn, and the high fusion polyurethane elastic fiber and the high melting point polyurethane resin come into contact with each other and thermally fuse, and the elongation recovery property is improved. It is possible to obtain a knitted fabric that is good, prevents defects such as run-out, and does not impair the aesthetics at all.
• the highly fused polyurethane of the present invention can be used.
• the non-woven fibers When the non-woven fibers are inserted or braided, they become less likely to be soft (displacement, slip-off, pop-out) due to fusion with the inelastic yarn and further fusion between the polyurethane elastic fibers.
• the durability of the fabric can be significantly improved. Also, the fabric is more stable, curling is less likely to occur, and cost reduction during sewing can be expected.
• L 1 and L 2 are the entire import (A 11 1 -in)
• L 1 and L 2 are every other insert (lin_lout)
• L l, L 2, and L 3 in Figs. 5 to 8 are the total import (A l 1-in).
• a in FIGS. 3 to 8 is a non-elastic yarn
• b is a high fusion polyurethane elastic fiber of the present invention used alone or in alignment with a high melting point polyurethane elastic fiber
• c in FIGS. Force of Using Two High-Fusion Polyurethane Elastic Fibers of the Invention One high-fusion polyurethane elastic fiber and one high-melting polyurethane elastic fiber of the present invention can be used.
• the inelastic yarn to be mixed with the high-fusible polyurethane elastic fiber and for example, natural fibers such as cotton, hemp, wool, and silk, and recycled fibers such as rayon, cuvula, and polynosic.
• Fibers such as semi-regenerated fibers such as acetate and chemically synthetic fibers such as nylon, polyester and acrylic can be used, and the mixing ratio of polyurethane elastic fibers is preferably about 1 to 40%.
• the woven or knitted fabric mixed with polyurethane elastic fibers of the present invention 200 ° C. or more, preferably 210 ° C., which is excellent in heat resistance and elastic recovery by a dry spinning method in which a chain length reaction is performed with diamine, is preferred.
• a high-melting polyurethane elastic fiber having a melting point of C or higher it is possible to obtain a woven or knitted fabric having good elasticity while maintaining the fusibility.
• the amount of the high-melting polyurethane fiber used is preferably about 2 to 40%.
• the dry heat setting method can be performed by using a setting machine such as a pin tenter and heat-fixing with hot air.
• the set temperature should be 140 to 200 ° C, especially 170 to 190 ° C
• the set time should be 10 seconds to 3 minutes, especially 30 seconds to 2 minutes. it can.
• the moist heat setting method can be performed by heat setting with saturated steam at a predetermined pressure in a state where a knitted fabric or the like is placed in a template.
• the set temperature is 100 to 130 ° (particularly, 105 to 125 ° C.)
• the set time can be 2 to 60 seconds, particularly 5 to 30 seconds.
• ADVANTAGE OF THE INVENTION According to this invention, it can process at low set temperature, and can obtain the woven-knitted fabric mixed with polyurethane elastic fiber which is hard to generate misalignment, rag, fraying, run, force, slip-in and misalignment.
• MDI 4,4'-diphenylmethane diisocyanate
• PTMG polytetramethylene ether glycolone having a number average molecular weight of 2,000
• the obtained polymer was introduced into two 8-nozzle spinning heads maintained at a temperature of 192 ° C.
• the spinning polymer is weighed and pressurized by a gear pump installed on the head, filtered through a filter, and then through a 0.6 mm diameter, 1 hole nozzle at a speed of 2.67 g / min into a 6 m long spinning cylinder. (Total amount discharged from the nozzle:
• the NCO group content of the polyurethane elastic fiber immediately after ejection was 0.42% by mass.
• this polyurethane elastic fiber was measured by the methods described below. As a result, the melting point was 168 ° C. and the heat retention strength was 65%. Further, a knitted fabric was prepared using the elastic fiber by the following method, and the knitting tension of the knitted fabric after heat setting was measured. The results are shown in Table 1.
• TMA thermo equipment measuring device
• Heating rate 20 ° C / min Evaluation: The temperature when the thermal stress became 0 mgf was defined as the melting point.
• the polyurethane elastic fiber is held at a grip length of 10 cm and stretched to 20 cm. In the stretched state, it was placed in a hot air drier maintained at 150 ° C. for 45 seconds to perform heat treatment.
• the tenacity of the polyurethane elastic fiber after the heat treatment was measured using a tensile tester with a constant elongation speed at a grip length of 5 cm and an elongation speed of 50 O mmZ.
• the environment at the time of measurement was a temperature of 20 ° C and a relative humidity of 65%. Shows the heat and strength retention of the fiber before heat treatment.
• Yarn feeder 2 and 4 of the pantyhose knitting machine (manufactured by Ronati Co., Ltd., number of stitches: 400), 6 nylon filaments, 13 decitex, 7 filaments, and 1 and 3 polyester yarns was performed.
• the prepared knitted fabric was subjected to dry heat treatment for 1 minute in a dryer maintained at 160 ° C. and 180 ° C.
• a polyurethane elastic fiber using polyester diol was produced in the same manner as in Example 1 except that polyethylene glycol adiate having a number average molecular weight of 2,000 was used instead of PTMG.
• the NCO group content of the polyurethane elastic fiber immediately after the ejection was 0.45% by mass.
• the physical properties were measured in the same manner as in Example 1. As a result, the melting point of the 44 decitex polyurethane elastic fiber was 170 ° C., and the retention of heat and strength was 62%.
• Example 44 decitex polyurethane elastic fiber (Mobilon P-type yarn manufactured by Nisshinbo Industries Inc.) using PTMG as the polymer diol and diamine as the chain extender was used.
• the physical properties were measured in the same manner as in Example 1.
• the polyurethane elastic fiber had a melting point of 22 ° C. and a heat retention strength of 95%.
• a spinning polymer was synthesized in the same manner as in Example 1, extruded from an reactor into a strand through an orifice having a diameter of 4 mm, cooled, and cut to obtain a polyurethane bullet-fe body pellet.
• the pellets were dried in a vacuum drier, melted again in a single screw extruder, weighed and pressurized by a gear pump installed in the spinning head in the same manner as in Example 1, filtered through a filter, and filtered to a diameter of 0.6 mm.
• the NCO group content of the polyurethane elastic fiber immediately after ejection was 0.13% by mass.
• Example 1 The physical properties were measured in the same manner as in Example 1. As a result, the polyurethane elastic fiber had a melting point of 152 ° C. and a heat-resistant tenacity retention of 38%. A knitted fabric was prepared using this fusible fiber in the same manner as in Example 1, and the knitting tension of the knitted fabric after heat setting was measured. The results are shown in Table 1. Table 1
• Knitting tension from knitted fabric (c N)
• Example 3 the deknitting tension was high due to fusion, and in the case of the polyurethane elastic fiber using polyetherdiol of Example 1, the deknitting tension was particularly high. Further, in both Examples 1 and 2, even in the heat set at 180 ° C., the viscous fibers in the knitted fabric did not break. In the case of the combination with the high-melting-point polyurethane elastic fiber of Comparative Example 1, fusion hardly occurs. In Comparative Example 2, the knitting tension by the heat setting at 160 ° C is high, but in the knitted fabric by the heat setting at 180 ° C. Polyurethane elastic fiber breaks. (Example 3)
• Example 2 Using the polyurethane elastic fiber obtained in Example 1, a knitted fabric prepared by the following method was heat-set, and a washing test was performed. Fraying, slip-in, and a knitted ground of the knitted fabric were visually observed. Table 2 shows the results.
• the weaving magnification was set to 2.5 times.
• the prepared knitted fabric was subjected to dry heat treatment for 1 minute in a dryer maintained at 180 ° C.
• a 15 x 20 cm cut sample was created from the knitted fabric after setting, and Suga Test Machine Co., Ltd.
• the washing was repeated 20 times using an LM-160 washing tester.
• Example 3 Using the same knitting machine as in Example 3, the polyurethane elastic fiber of Example 1 was supplied to the first and third ports, and the viscous fiber of Comparative Example 1 was supplied to the second and fourth ports to form a knitted fabric in the same manner as in Example 3. A test similar to that of Example 3 was performed. Table 2 shows the results.
• a knitted fabric was made in the same manner as in Example 3 using only the elastic fiber of Comparative Example 1, and a similar test was performed. Table 2 shows the results.
• Example 2 In the same manner as in Example 1, a polyurethane elastic fiber of 156 dtex was obtained. The physical properties were measured in the same manner as in Example 1. As a result, the melting point of the polyurethane elastic fiber was 170 ° C., and the heat-resistant tenacity retention was 68%. Further, a warp knitted fabric was prepared by using the elastic fiber by the following method, and the pull-out resistance value of the polyurethane elastic fiber was measured from the knitted fabric after the heat setting. Table 3 shows the results.
• 6-nylon filament yarn 56 decitex 17 filament is used for L 1 a and L 3 c in FIG. 9 and polyurethane elastic fiber is used for L 2 b in FIG. Was used to create a warp knitted fabric.
• the above knitted fabric was subjected to dry heat treatment for 1 minute in a dryer maintained at 190 ° C.
• test piece having a weft direction (width) of 25 mm and a meridian direction (length) of 10 O mm as shown in FIG. 10 was sampled. At this time, a total of 10 test pieces were collected for each of the five test pieces so that the drawing direction of the polyurethane elastic fiber was the knitting start and knitting end directions.
• test pieces were prepared as shown in FIG.
• the test piece was cut at a position ( ⁇ - ⁇ ') 40 mm from the lower end (D-D') of the test piece while leaving one polyurethane elastic fiber 1 inserted in the warp direction.
• the remaining polyurethane elastic fiber is Then, it was taken out from the test piece by 5 mm (E-F) toward the direction of the upper grip 2.
• a cut 3 having a width of 3 mm was made in the weft direction on the extension line of the polyurethane elastic fiber and at a position of 3 O mm from the upper end of the test piece.
• Polyurethane elastic fiber of 156 decitex using PTMG as polymer diol and diamine as chain extender (Mobilon P type yarn, manufactured by Nisshinbo Industries, Ltd., melting point: 21.7 ° C, retention of heat resistance 93% ) was used as a warp knitted fabric in L2b of FIG. 9 to prepare a warp knitted fabric in the same manner as in Example 5.
• the pull-out resistance value of the L2 b yarn was measured in the same manner as in Example 5. Table 3 shows the results.
• Example 5 Using the same knitting machine as in Example 5, using 6-nylon filament yarn 56 decitex 17 filament for L 1 a in FIG. 3 and using the polyurethane elastic fiber of Example 5 for L 2 b. A warp knitted fabric was prepared, and the same test as in Example 5 was performed. Table 3 shows the results.
• Example 7 A knitted fabric was prepared in the same manner as in Example 6, except that the same elastic fiber as that in Comparative Example 5 was used for L2b in FIG. 3, and a similar test was performed. Table 3 shows the results. (Example 7)
• Example 5 Using the same knitting machine as in Example 5, a 6-nylon filament yarn 56 decitex 17 filament is used for a of L1 and L2 in FIG. 4 and the polyurethane of Example 5 is used for b of L3 and L4. A warp knitted fabric was prepared using elastic fibers, and the same test as in Example 5 was performed. Table 3 shows the results.
• a warp knitted fabric was prepared in the same manner as in Example 7 except that the elastic fiber of Comparative Example 5 was used for L3 and L4b in FIG. 4, and the same test was performed. Table 3 shows the results.
• Example 5 the pull-out resistance value was increased due to fusion, and in Example 6, the knitted fabric was fused to such an extent that it was not pulled out, and was less likely to cause misalignment and softness. In the combination with the high-melting-point polyurethane elastic fibers of Comparative Examples 5, 6, and 7, fusion was unlikely to occur, the pull-out resistance was low, and misalignment and softness occurred.
• a Raschel knitting machine manufactured by Carl Myer, 28 gauge
• the knitted fabric of the woven diagram was created.
• 6-nylon filament yarn 56 a decitex 17 filament is used for a of L 1
• the same elastic fiber as Comparative Example 5 is used for c of L 2
• the polyurethane elastic fiber of Example 1 is used for c of L 3
• the warp knitted fabric was knitted into the main knitted fabric.
• a warp knitted fabric was prepared using nylon filament yarn 110 decitex 24 filaments as a yarn to be removed between the main knitted fabrics.
• the above knitted fabric was subjected to dry heat treatment for 1 minute in a dryer maintained at 190 ° C.
• the deknitting tension of the drawn nylon yarn was measured.
• the unpacking speed was 10 O mm / min, the unpacking tension for 1 minute was measured, and the average value at five peak points was calculated.
• the prepared sample was washed continuously for 300 minutes under the following conditions.
• Load cloth bare fabric knitted fabric mixed with cotton and polyurethane / raw fiber, 1.0 kg knitted fabric damage evaluation
• ⁇ and X are damages to the extent that hesitate to wear them as clothing, and ⁇ to ⁇ ⁇ ⁇ ⁇ are preferred in terms of washing durability.
• a warp knitted fabric was prepared in the same manner as in Example 8, except that the elastic fiber of Comparative Example 1 was used for c of L3 in FIG. After the heat setting, the unknitting tension of the drawn yarn was measured, the state of fusion of the polyurethane elastic fiber was confirmed, and the same test as in Example 8 was performed. Table 4 shows the results.
• Example 9 Using a knitting machine similar to that of Example 8, 6-nylon filament yarn 56 decitex 17 filament is used for L 1 a in FIG. 6, polyurethane polyurethane fiber of Comparative Example 1 is used for L 2 c and L 3 A warp knitted fabric was prepared using the polyurethane elastic fiber of Example 1 in c, and the same test as in Example 8 was performed. Table 4 shows the results. (Comparative Example 9)
• a warp knitted fabric was prepared in the same manner as in Example 9 except that the elastic fiber of Comparative Example 1 was used for c of L3 in FIG. 6, and a similar test was performed. Table 4 shows the results.
• Example 10 Using the same knitting machine as in Example 8, using 6-nylon filament yarn 56 decitex 17 filament for L 1 a in FIG. 7 and using the polyurethane elastic fiber of Example 1 for L 2 b, A warp knitted fabric was prepared without using the thread, and the same test as in Example 8 was performed. Table 4 shows the results. (Comparative Example 10)
• a warp knitted fabric was prepared in the same manner as in Example 10 except that the elastic fiber of Comparative Example 1 was used for L2b in FIG. 7, and the same test was performed. Table 4 shows the results.
• Example 8 Using the same knitting machine as in Example 8, using 6-nylon filament yarn 56 decitex 17 filament for L 1 a in FIG. 8 and using the polyurethane elastic fiber of Example 1 for L 2 b, A warp knitted fabric was prepared without using the thread, and the same test as in Example 8 was performed. Table 4 shows the results. .
• a knitted fabric was prepared in the same manner as in Example 11 except that the elastic fiber of Comparative Example 1 was used for L2b in FIG. 8, and a similar test was performed. Table 4 shows the results. Table 4
• Example 10 the highly fused polyurethane elastic fibers were completely fused to each other, and the fused portion could not be peeled off.
• Comparative Examples 10 and 11 the fusion between the high-melting-point polyurethane elastic fibers was weak, and they could be peeled off.

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• Knitting Of Fabric (AREA)
• Artificial Filaments (AREA)
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