WO2017204047A1 - 高熱収縮性ポリアミド繊維およびそれを用いた混繊糸および織編物 - Google Patents
高熱収縮性ポリアミド繊維およびそれを用いた混繊糸および織編物 Download PDFInfo
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- WO2017204047A1 WO2017204047A1 PCT/JP2017/018476 JP2017018476W WO2017204047A1 WO 2017204047 A1 WO2017204047 A1 WO 2017204047A1 JP 2017018476 W JP2017018476 W JP 2017018476W WO 2017204047 A1 WO2017204047 A1 WO 2017204047A1
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- Prior art keywords
- polyamide
- yarn
- heat
- fiber
- dtex
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/18—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by combining fibres, filaments, or yarns, having different shrinkage characteristics
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/567—Shapes or effects upon shrinkage
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- 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
Definitions
- the present invention relates to a polyamide fiber having high heat shrinkability, a blended yarn and a woven or knitted fabric using the same.
- polyester fiber As a typical example of a fiber imparted with high shrinkage, there is a high shrinkage polyester fiber.
- polyester fiber has a property of higher Young's modulus compared to polyamide fiber, the texture after heat treatment and shrinkage is high. It was hard and there was a problem with comfort for clothing.
- the polyamide fiber has a low Young's modulus and a soft texture, and has excellent properties such as wear resistance. Therefore, the polyamide fiber is suitably used for clothing applications. A lot of development has been done.
- Patent Document 1 discloses a highly shrinkable polyamide fiber composed of crystalline polyamide and amorphous polyamide and having a boiling water shrinkage of 35% or more.
- Patent Document 2 discloses a highly shrinkable polyamide fiber composed of crystalline polyamide and amorphous polyamide and having a boiling water shrinkage of 15% or more.
- Patent Document 3 discloses a highly shrinkable polyamide fiber having a heat shrinkage stress of 220 to 400 mg / d.
- Patent Document 4 discloses a highly shrinkable polyamide fiber having a heat shrinkage stress of 0.15 cN / dtex or more.
- the high-shrinkage polyamide fibers disclosed in Patent Documents 1 and 2 have a high boiling water shrinkage ratio, the shrinkage stress is small. Therefore, the woven or knitted fabric obtained by weaving and knitting the polyamide fibers is subjected to heat treatment. However, it was not sufficiently shrunk and a high-density fabric with a swelled feeling could not be obtained.
- the high-shrinkage polyamide fibers disclosed in Patent Documents 3 and 4 have high heat shrinkage stress, since the glass transition temperature (Tg) is close to room temperature, no tension is applied to the polyamide fibers such as woven or knitted fabric. If it is stored in a state, the heat shrinkage stress will decrease over time, and even if heat treatment is performed on the woven or knitted fabric obtained by weaving or knitting the polyamide fiber, the shrinkage stress is small, so that it does not shrink sufficiently and bulges. A dense fabric with a feeling was not obtained.
- Tg glass transition temperature
- the present invention solves the above-mentioned problems, and provides a polyamide fiber having high heat shrinkability having a high shrinkage characteristic with high heat shrinkage stress (H) and boiling water shrinkage (B), and thereby
- the woven or knitted fabric using the polyamide fiber and / or the mixed fiber having high heat shrinkability at least partially has a bulkiness. It is an object to provide a high-density woven or knitted fabric with a soft feeling.
- the high heat shrinkable polyamide fiber of the present invention has the following constitution.
- the glass transition temperature (Tg) is 85 to 95 ° C.
- the boiling water shrinkage (B) is 25 to 50%
- the heat shrinkage stress (H) is 0.20 cN / dtex or more.
- the high heat shrinkable polyamide fiber according to (1) wherein the total fineness is 5 to 80 dtex and the single yarn fineness is 0.9 to 3.0 dtex.
- a blended yarn characterized by using the high heat-shrinkable polyamide fiber according to (1) or (2) as at least a part of the blended yarn.
- a woven or knitted fabric characterized in that the high heat-shrinkable polyamide fiber described in (1) or (2) and / or the mixed yarn described in (3) is used in at least a part of the woven or knitted fabric.
- the high heat-shrinkable polyamide fiber of the present invention has high heat shrinkage stress (H) and boiling water shrinkage (B) and excellent shrinkage characteristics, and has a high glass transition temperature (Tg) and no reduction in heat shrinkage stress over time.
- the blended yarn using the high heat-shrinkable polyamide fiber at least partially by the high heat-shrinkable polyamide fiber has bulkiness, and at least a part of the polyamide fiber and / or blended yarn having high heat-shrinkability is used.
- the woven or knitted fabric can be made into a high-density woven or knitted fabric with a feeling of swelling and softness.
- the high heat-shrinkable polyamide fiber of the present invention is a fiber composed of crystalline polyamide and amorphous polyamide.
- Crystalline polyamide is a polyamide that forms crystals and has a melting point, and is a polymer in which a so-called hydrocarbon group is connected to the main chain via an amide bond, and is composed of polycoupleramide, polyhexamethylene adipamide, polyhexamethylene sebaca. Amide, polytetramethylene adipamide, condensation-polymerized polyamide of 1,4-cyclohexanebis (methylamine) and linear aliphatic dicarboxylic acid, and their copolymers or mixtures thereof. However, it is preferable to use a homopolyamide in terms of easy reproduction of a uniform system and stable function expression.
- the crystalline polyamide is preferably composed of diamines and dibasic acids, and specific diamines include tetramethylene diamine, hexamethylene diamine, nonamethylene diamine, undecamethylene diamine, dodecamethylene diamine, 2, 2, 4 -Trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, bis- (4,4'-aminocyclohexyl) methane, metaxylylenediamine and the like.
- Dibasic acids include glutaric acid, pimelic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecadioic acid, hexadecadioic acid, hexadecenedioic acid, eicosandioic acid, diglycolic acid, 2, Examples include 2,4-trimethyladipic acid, xylylene dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and the like. Any crystalline polyamide may be used for the highly heat-shrinkable polyamide fiber of the present invention, but polycoupleramide and polyhexamethylene adipamide are preferred from the viewpoints of production cost and fiber strength retention.
- the non-crystalline polyamide in the high heat-shrinkable polyamide fiber of the present invention is a polyamide which does not form a crystal and does not have a melting point.
- amorphous polyamides may be used alone or in combination of two or more.
- the amorphous polyamide used for the highly heat-shrinkable polyamide fiber of the present invention is preferably a polycondensate of isophthalic acid / terephthalic acid / hexamethylenediamine from the viewpoint of having a high glass transition temperature (Tg).
- the weight ratio of the amorphous polyamide is less than 10% by weight, the shrinkage characteristics of the heat shrinkage stress (H) and the boiling water shrinkage (B) are reduced.
- the fabric does not shrink sufficiently even when heat treatment is performed, and the fabric has a high density and a soft feeling. Can't get.
- the weight ratio here refers to a peak area (A) of a signal (usually around 3 ppm) derived from hydrogen at the ⁇ -position of a carboxyl group that forms an amide bond, as measured by proton NMR of a high heat-shrinkable polyamide fiber, and an aromatic
- the mass number of the repeating unit of the polyamide is measured by performing mass spectrometry on the same highly heat-shrinkable polyamide fiber.
- the weight ratio is calculated from the product of the obtained repetition ratio and the mass number of each polyamide repeating unit.
- pigments for high heat-shrinkable polyamide fibers, pigments, heat stabilizers, antioxidants, weathering agents, flame retardants, plasticizers, mold release agents, lubricants, foaming agents, antistatic agents, moldability improvement, as necessary Agents, reinforcing agents, etc. may be added.
- the high heat-shrinkable polyamide fiber of the present invention is a compatible system in which crystalline polyamide and amorphous polyamide are compatible with each other. Judgment of compatible system and incompatible system is based on the result of 3000 times TEM observation, when a phase separation structure of a sea island having a dispersed phase with a diameter of 10 nm or more is observed. When no phase separation structure was observed, it was determined as a compatible system.
- a high strain band can be formed in the amorphous part of the crystalline polyamide by forming entanglement when the amorphous polyamide forms a fiber structure in the crystalline polyamide, and the desired boiling water shrinkage is achieved.
- the rate (B) and the heat shrinkage stress (H) can be expressed.
- the high heat-shrinkable polyamide fiber of the present invention has a glass transition temperature (Tg) of 85 to 95 ° C.
- the glass transition temperature (Tg) of the high heat shrinkage stress polyamide fiber of the present invention is an index of the reactivity between the crystalline polyamide and the amorphous polyamide, and is generated in the amorphous part of the crystalline polyamide when the structure is formed in the fiber. Depends on the formation of high strain bands. By setting the glass transition temperature (Tg) in such a range, even when the polyamide fiber is stored in a state where no tension is applied, a desired heat shrinkage stress (H2) with time can be expressed.
- the glass transition temperature (Tg) is less than 85 ° C.
- the high strain band formed in the amorphous part of the crystalline polyamide is relaxed. Therefore, when the polyamide fiber is stored in a state in which no tension is applied, the desired aging Thermal contraction stress (H2) cannot be obtained.
- the glass transition temperature (Tg) exceeds 95 ° C., the amorphous polyamide and the crystalline polyamide react too much, and the crystal size becomes small. Therefore, although the initial heat shrinkage stress (H) is high, the polyamide fiber Is stored in a state where no tension is applied, the desired heat shrinkage stress (H2) over time cannot be obtained.
- the glass transition temperature (Tg) of the high heat-shrinkable polyamide fiber is preferably 87 to 93 ° C.
- the heat shrinkage stress (H2) with time of the high heat-shrinkable polyamide fiber is preferably 0.20 cN / dtex or more, more preferably 0.25 cN / dtex or more, and most preferably 0.30 cN / dtex or more. Also, if the heat shrinkage stress becomes too high, when the woven fabric is produced, the shrinking power becomes too high, and the eyes at the intersection of the woven fabric are clogged too much. Since it becomes easy to generate
- the high heat-shrinkable polyamide fiber of the present invention has a boiling water shrinkage (B) of 25 to 50%.
- B boiling water shrinkage
- the boiling water shrinkage (B) is less than 25%, when a blended yarn is produced, the yarn length difference is hardly exhibited even when heat treatment is performed, and sufficient bulkiness cannot be obtained.
- the boiling water shrinkage (B) of the high heat-shrinkable polyamide fiber is preferably 30 to 45%.
- the boiling water shrinkage (B) here refers to a length of A obtained by making a fiber sample into a 50 cm loop, applying an initial load of 1/30 (g) of the fineness, and then free to immerse in boiling water for 30 minutes. Then, it is air-dried, the initial load of 1/30 (g) of the fineness is again applied to obtain the length B, and the boiling water shrinkage rate (B) is calculated by the following formula.
- Boiling water shrinkage (B) (%) [(AB) / A] ⁇ 100
- the high heat shrinkable polyamide fiber of the present invention has a heat shrinkage stress (H) of 0.20 cN / dtex or more.
- the heat shrinkage stress (H) mentioned here is a KE-2 type heat shrinkage stress measuring machine manufactured by Kanebo Engineering Co., Ltd., and the fiber yarn to be measured is tied into a loop having a circumference of 16 cm, and the yarn fineness (decitex)
- the initial load of 1/30 g was applied, the load when the temperature was changed at a temperature increase rate of 100 ° C./min was measured, and the peak value (maximum value) of the obtained thermal stress curve was determined as the heat shrinkage stress (cN / dtex). ) Is measured.
- the heat shrinkage stress (H) of the high heat-shrinkable polyamide fiber within such a range, when a mixed yarn is produced, the fiber having different shrinkage properties is pulled and shrunk when heat-treated with boiling water or steam. As a result, a bulky mixed yarn can be obtained.
- fabrics when they are heat-treated with boiling water, steam, etc., fibers with different shrinkage properties are pulled tightly and sufficiently shrunk to obtain a high-density fabric with a feeling of swelling and softness. it can.
- the heat shrinkage stress (H) of the high heat shrinkable polyamide fiber is preferably 0.25 cN / dtex or more, more preferably 0.30 cN / dtex or more.
- the upper limit of the heat shrinkage stress (H) of the high heat shrinkable polyamide fiber is preferably 0.50 cN / dtex.
- the high heat-shrinkable polyamide fiber of the present invention exhibits shrinkage characteristics within the above ranges of boiling water shrinkage (B) and heat shrinkage stress (H). That is, it is important to simultaneously satisfy the boiling shrinkage rate (B) representing the dimensional change when heat-treated with boiling water, steam, or the like, and the heat shrinkage stress (H) representing the power (force) to shrink.
- boiling water shrinkage rate (B) and the heat shrinkage stress (H) in the above-mentioned ranges, when a mixed yarn containing at least a part of the high heat shrinkable polyamide fiber is produced, By heat treatment, a yarn length difference from fibers having different shrinkage characteristics is developed, and fibers having different shrinkage characteristics are pulled and shrunk to obtain a bulky mixed yarn.
- heat treatment with boiling water, steam, etc. can sufficiently contract fibers with different shrinkage properties and sufficiently shrink to obtain a high-density fabric with a feeling of swelling and softness. it can.
- the high heat-shrinkable polyamide fiber of the present invention preferably has a total fineness of 5 to 80 dtex.
- 8 to 50 dtex is more preferable, and 8 to 40 dtex is more preferable.
- the single yarn fineness of the high heat-shrinkable polyamide fiber is preferably 0.9 to 3.0 dtex.
- 0.9 to 2.0 dtex is more preferable, and 0.9 to 1.3 dtex is more preferable from the viewpoint of the strength and softness of the fabric when used as sportswear, down jackets, outer and inner base fabrics. is there.
- the high elongation rate of the high heat-shrinkable polyamide fiber of the present invention is not limited as long as it is usually used for clothing. From the viewpoint of higher processing, the elongation is 25 to 50% and the strength is 2.5 cN / dtex. The above is more preferable.
- the fineness unevenness (U%) in the longitudinal direction of the highly heat-shrinkable polyamide fiber of the present invention is preferably 1.2% or less, and 1.0% or less from the viewpoint of the fabric quality of the fabric when used as a woven fabric for clothing. More preferred. More preferably, it is 0.8% or less.
- the cross-sectional shape of the highly heat-shrinkable polyamide fiber of the present invention is not particularly limited, but can be any shape depending on the application and the like, and a circular shape, a triangular shape, a flat shape, a Y shape and a star shape are preferable.
- a method for producing the highly heat-shrinkable polyamide fiber of the present invention will be described.
- a melt kneading method using a pressure melter, a uniaxial extruder or a biaxial extruder when mixing and melting the crystalline polyamide and the amorphous polyamide can be mentioned.
- the melt kneading method is preferably a pressure melter method or an extruder method.
- H heat shrinkage stress
- the pressure melter When the pressure melter is used, it is not uniformly mixed, so a sea-island phase separation structure is formed, and high heat shrinkage stress (H) cannot be obtained.
- the biaxial extruder when the biaxial extruder is used, the crystalline polyamide and the amorphous polyamide react too much, and the high strain band formed in the amorphous part of the crystalline polyamide is reduced, and a high heat shrinkage stress (H ) Is not obtained.
- the mixed polymer of crystalline polyamide and amorphous polyamide that has flowed into the spinning pack is discharged from a known spinneret.
- the melting temperature and spinning temperature are preferably the melting point of polyamide + 20 ° C. to the melting point + 60 ° C.
- a method in which the spinning and drawing steps are continuously performed (direct spinning drawing method), a method in which the undrawn yarn is wound once and then drawn (two-step method), or Although it can be produced by any method such as a method in which the spinning speed is set to 3000 m / min or higher and the drawing process is substantially omitted (high-speed spinning method), direct spinning from the viewpoint of high-efficiency production and production cost.
- a one-step method of stretching and high speed spinning is preferred.
- melt spinning by the direct spinning drawing method will be exemplified.
- the polyamide yarn discharged from the spinneret is cooled, solidified, and lubricated in the same manner as in ordinary melt spinning, and then taken up at 500 to 4000 m / min by the first godet roller. After stretching between 1.0 and 4.0 times between the dead rollers, it is wound on a package at 2000 m / min or more, preferably 3000 to 4500 m / min.
- the target polyamide yarn is strongly stretched.
- the degree can be obtained.
- the hot stretching temperature is preferably 130 to 160 ° C, more preferably 140 to 160 ° C.
- the heat shrinkage stress of the yarn can be appropriately designed by performing heat setting with the second godet roller as a heating roller.
- the heat setting temperature is preferably 130 to 180 ° C, and more preferably 150 to 170 ° C.
- the blended yarn of the present invention uses at least a part of the high heat shrink polyamide fiber of the present invention.
- the fiber having different shrinkage referred to here is a fiber having a different boiling water shrinkage ratio (B) when heat-treated with boiling water or steam.
- B boiling water shrinkage ratio
- examples of chemical fibers include polyamide fibers typified by polycapramide and polyhexamethylene adipamide, polyester fibers typified by polyethylene terephthalate, and polypropylene typified by polypropylene. Polyolefin fiber and the like.
- polyamide fibers and polyester fibers are preferred. Polyamide fibers are more preferred for sportswear, down jacket, outer and inner applications.
- the difference in boiling water shrinkage (B) between the high heat-shrinkable polyamide fiber of the present invention and the fiber having different shrinkage characteristics is preferably 10 to 30% from the viewpoint of soft feeling and bulge feeling. More preferably, the difference in boiling water shrinkage (B) is 15 to 30%.
- the difference in heat shrinkage stress (H) between the highly heat shrinkable polyamide fiber of the present invention and the fiber having different shrinkage characteristics is 0.10 to 0.40 cN / dtex in terms of soft feeling and swell feeling. preferable. More preferably, the difference in heat shrinkage stress (H) is 0.15 to 0.30 cN / dtex.
- the blended yarn of the present invention can be processed according to a known method.
- the fiber blending method spinning fiber blending, air fiber blending, synthetic twisting, composite false twisting, and the like can be applied.
- air fiber blending is preferable because the fiber blending is easy to control and the manufacturing cost is low.
- the air-mixing method include interlace processing, Taslan processing, and processing using a swirling airflow.
- the woven or knitted fabric of the present invention uses at least a part of the high heat shrink polyamide fiber and / or mixed yarn of the present invention.
- the high heat-shrinkable polyamide fibers and fibers with different shrinkage characteristics when heat-treated with boiling water or steam, the high heat-shrinkable polyamide fibers shrink sufficiently, and the fibers with different shrinkage characteristics are pulled and shrunk.
- a high-density woven or knitted fabric with a feeling of swelling and softness can be obtained.
- the woven or knitted fabric of the present invention can be woven or knitted according to a known method.
- the structure of the woven or knitted fabric is not limited.
- the structure may be any of a plain structure, a twill structure, a satin structure, a changed structure thereof, or a mixed structure, but the texture of the woven fabric has a solid texture.
- a flat structure having many restraint points, a ripstop structure combining a flat structure, a stone structure, and a Nanako structure are preferable.
- the structure may be any of a round knitted fabric, interlocked fabric, warp knitted fabric half, satin, jacquard, or their modified or mixed tissue, depending on the intended use.
- a half-textured fabric such as a single tricot knitted fabric is preferable from the viewpoint that the knitted fabric is thin and stable and has an excellent elongation rate.
- the use of the woven or knitted fabric of the present invention is not limited, but is preferably used for clothing, and more preferably sports such as down jackets, windbreakers, golf wear, and rain wear. Casual wear and ladies' men's clothing. In particular, it can be suitably used for sportswear and down jackets.
- DSC differential scanning calorimeter
- Total fineness and single yarn fineness The total fineness and single yarn fineness were measured according to JIS L1013.
- a fiber sample is wound 200 times with a measuring instrument having a frame circumference of 1.125 m with a tension of 1/30 (g). It was dried at 105 ° C for 60 minutes, transferred to a desiccator, allowed to cool in an environment of 20 ° C and 55RH for 30 minutes, and the weight per 10,000 m was calculated from the value obtained by measuring the weight of the skein.
- the total fineness of the fiber was calculated as%. The measurement was performed 4 times, and the average value was defined as the total fineness. The value obtained by dividing the total fineness by the number of filaments was defined as the single yarn fineness.
- Tg Glass transition temperature
- H Heat shrinkage stress
- H2 time-dependent heat shrinkage stress
- a KE-2 type heat shrinkage stress measuring machine manufactured by Kanebo Engineering Co., Ltd., tying the fiber yarn unwound from the wound package into a loop with a circumference of 16 cm, applying an initial load of 1/30 g of the fineness of the yarn, The thermal stress when the temperature was changed from room temperature to 210 ° C. at a rate of temperature increase of 100 ° C./min was measured, and the peak value (maximum value) of the obtained thermal stress curve was defined as the heat shrinkage stress (H). Further, the fiber yarn unwound from the wound package is tied into a loop having a circumference of 16 cm, and is kept at 20 ° C.
- TMS Tetramethylsilane
- Crystals from the peak area (A) of the signal (usually around 3 ppm) derived from the ⁇ -position hydrogen of the carboxyl group forming the amide bond and the peak area (B) of the signal derived from the aromatic hydrocarbon (usually around 7 ppm)
- the obtained nylon 6 yarn had a fineness of 78.8 dtex, a strength of 4.0 cN / dtex, an elongation of 59%, a boiling water shrinkage of 10%, and a heat shrinkage stress of 0.09 cN / dtex.
- (B) Production of blended yarn The nylon 6 yarn obtained in (a) above and the polyamide yarn obtained in Examples 1 to 7 and Comparative Examples 1 to 6 were entangled using an interlace processing machine. 2.0 kg / cm 2 of entanglement treatment was performed to carry out blending processing to obtain a blended yarn of 113 dtex or 122 dtex.
- (C) Tube Knitted Fabric Fabrication A blended yarn sample obtained in (b) above was adjusted with a tube knitting machine so as to have a stitch of 50 to fabricate a tube knitted fabric.
- the obtained tubular knitted fabric is scoured at 80 ° C. for 20 minutes, then adjusted to pH 4 with Kayanol Yellow N5G 1% owf and acetic acid, dyed at 100 ° C. for 30 minutes, and then at 80 ° C. for 20 minutes. Fix treatment was performed, and finally heat treatment was performed at 170 ° C. for 30 seconds to improve the texture.
- Example 1 Polycaprolactam (N6) (relative viscosity ⁇ r: 2.62, melting point 222 ° C.) as a crystalline polyamide and isophthalic acid (6I) / terephthalic acid (6T) / hexamethylenediamine polycondensate as an amorphous polyamide A copolymer having an acid / terephthalic acid copolymerization ratio of 7/3 (relative viscosity ⁇ r: 2.10), a crystalline polyamide / non-crystalline polyamide weight ratio of 70/30, and a uniaxial extruder 265 The mixture was melt-kneaded at 0 ° C.
- Example 2 Spinning was carried out in the same manner as in Example 1 except that the weight ratio of crystalline polyamide / amorphous polyamide was 85/15, and a 33 dtex 26 filament polyamide yarn (relative viscosity ⁇ r: 2.54, glass transition temperature). (Tg): 87 ° C.).
- Example 3 Spinning was carried out in the same manner as in Example 1 except that the weight ratio of crystalline polyamide / amorphous polyamide was 55/45, and a 33 dtex 26 filament polyamide yarn (relative viscosity ⁇ r: 2.39, glass transition temperature). (Tg): 92 ° C.).
- Example 4 Spinning was carried out in the same manner as in Example 1 except that polyhexamethylene adipamide (N66) (relative viscosity ⁇ r: 2.80, melting point 263 ° C.) was used as the crystalline polyamide, and the spinning temperature was changed to 285 ° C. And a polyamide yarn of 33 dtex 26 filament (relative viscosity ⁇ r: 2.59, glass transition temperature (Tg): 92 ° C.) was obtained.
- N66 polyhexamethylene adipamide
- Tg glass transition temperature
- Example 5 Spinning was carried out in the same manner as in Example 1 except that polyhexamethylene sebacimide (N610) (relative viscosity ⁇ r: 2.80, melting point 219 ° C.) was used as the crystalline polyamide, and a polyamide yarn of 33 dtex 26 filaments. A strip (relative viscosity ⁇ r: 2.59, glass transition temperature (Tg): 93 ° C.) was obtained.
- N610 polyhexamethylene sebacimide
- Tg glass transition temperature
- Example 6 Spinning was carried out in the same manner as in Example 1 except that the draw ratio was 2.8 times, and a 33 dtex 26 filament polyamide yarn (relative viscosity ⁇ r: 2.59, glass transition temperature (Tg): 92 ° C.) Obtained.
- Example 7 Spinning was carried out in the same manner as in Example 1 except that the weight ratio of crystalline polyamide / non-crystalline polyamide was 85/15 and the discharge rate was changed, and a polyamide yarn of 54 dtex 26 filament (relative viscosity ⁇ r: 2.54, glass transition temperature (Tg): 85 ° C.) was obtained.
- Example 1 Spinning was carried out in the same manner as in Example 1 except that the weight ratio of crystalline polyamide / non-crystalline polyamide was 95/5, and a 33 dtex 26 filament polyamide yarn (relative viscosity ⁇ r: 2.59, glass transition temperature ( Tg): 22 ° C.).
- Example 2 Spinning was carried out in the same manner as in Example 1 except that the weight ratio of crystalline polyamide / non-crystalline polyamide was 30/70, and a 33 dtex 26 filament polyamide yarn (relative viscosity ⁇ r: 2.26, glass transition temperature ( Tg): 23 ° C.).
- Example 3 Spinning was carried out in the same manner as in Example 1 except that melt kneading was performed using a biaxial extruder, and the first godet roller was not heated (stretching temperature: room temperature), and a polyamide yarn of 33 dtex 26 filament (relative viscosity ⁇ r : 2.96, glass transition temperature (Tg): 102 ° C.
- Example 4 Spinning was performed in the same manner as in Example 1 except that melt kneading was performed using a biaxial extruder and the stretching temperature of the first godet roller was 90 ° C., and polyamide yarn of 33 dtex 26 filament (relative viscosity ⁇ r: 2. 96, glass transition temperature (Tg): 102 ° C.).
- Table 1 summarizes the polymer composition, yarn-forming property (compatibility) and drawing conditions of the polyamide yarn.
- Table 2 summarizes the results of raw yarn characteristics, knitted fabric evaluation, and fabric evaluation of the obtained polyamide yarn.
- the fabric using the polyamide yarns of Examples 1 to 7 of the present invention as a part is subjected to a heat treatment process, so that the weft is caused by a difference in shrinkage between the warp and the weft.
- a high density fabric with a soft feeling and a swelling feeling suitable for apparel was obtained due to a synergistic effect of the action of shrinking and the action of wefts pulling warp and shrinking.
- the blended yarns partially using the polyamide yarns of Examples 1 to 7 of the present invention undergo the heat treatment process, and the core yarns are caused by the difference in shrinkage between the core yarns and the sheath yarns.
- An excellent shrinkage was expressed by a synergistic effect of the action of the yarn shrinking and the action of the core yarn pulling the sheath yarn to shrink, and a bulky mixed yarn was obtained.
- Comparative Example 1 since the amorphous polyamide weight ratio was small, both the heat shrinkage stress (H) and the boiling water shrinkage rate (B) were low, and the mixed yarn was inferior in bulkiness. In addition, the fabric was inferior in swelling and softness without having a sufficiently high density.
- Comparative Example 5 the compatibility between the crystalline polyamide and the amorphous polyamide is poor, and the glass transition temperature (Tg) is near room temperature, so that the polyamide fiber over time is stored in a state where no tension is applied. Since the shrinkage stress decreased with time, high heat shrinkage stress (H2) was not obtained and the mixed yarn was inferior in bulkiness. In addition, the fabric was inferior in swelling and softness without having a sufficiently high density.
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Abstract
Description
(1)ガラス転移温度(Tg)が85~95℃であって、沸騰水収縮率(B)が25~50%、熱収縮応力(H)が0.20cN/dtex以上であることを特徴とする高熱収縮性ポリアミド繊維。
(2)総繊度が5~80dtexであり、単糸繊度が0.9~3.0dtexであることを特徴とする(1)記載の高熱収縮性ポリアミド繊維。
(3)混繊糸の少なくとも一部に(1)または(2)に記載の高熱収縮性ポリアミド繊維を用いることを特徴とする混繊糸。
(4)織編物の少なくとも一部に(1)または(2)に記載の高熱収縮性ポリアミド繊維および/または(3)に記載の混繊糸を用いることを特徴とする織編物。
沸騰水収縮率(B)(%)=〔(A-B)/A〕×100
結晶性ポリアミドおよび非晶性ポリアミドを混合・溶融するに際し、プレッシャーメルター、単軸エクストルーダーや二軸エクストルーダーを使用する溶融混練法が挙げられる。溶融混練法としてプレッシャーメルター法あるいはエクストルーダー法が好ましく挙げられる。結晶性ポリアミドと非晶性ポリアミドとで相溶系を形成し、高い熱収縮応力(H)を得るためには、単軸エクストルーダーを用いることが好ましい。プレッシャーメルターを使用すると、均一に混合されないため、海島の相分離構造を形成し、高い熱収縮応力(H)を得られない。また、二軸エクストルーダーを用いる場合、結晶性ポリアミドと非晶性ポリアミドとが反応し過ぎてしまい、結晶性ポリアミドの非晶部に形成される高歪み帯が少なくなり、高い熱収縮応力(H)が得られない。紡糸パックへ流入した結晶性ポリアミドと非晶性ポリアミドの混合ポリマーは、公知の紡糸口金より吐出される。また、溶融温度、紡糸温度(いわゆるポリマー配管や紡糸パックまわりの保温温度)は、ポリアミドの融点+20℃~融点+60℃が好ましい。
紡糸口金から吐出されたポリアミド糸条は、通常の溶融紡糸と同様、冷却、固化され、給油した後に第一ゴデットローラーにて500~4000m/minで引き取り、第一ゴデットローラーと第二ゴデットローラー間にて1.0~4.0倍で延伸を行った後で、2000m/min以上、好ましくは3000~4500m/minでパッケージに巻き取る。
さらには、巻き取り直前に、追加で油剤を付与するのも可能である。
A.融点
示差走査熱量計(DSC)にTA Instrument社製Q1000を用いて熱分析を行い、Universal Analysis2000にてデータ処理を実施した。熱分析は窒素流下(50mL/min)で、温度範囲-50~300℃、昇温速度10℃/min、試料重量約5g(熱量データは測定後重量で規格化)にて測定を実施した。融解ピークから融点を測定した。
ポリアミドの試料0.25gを、濃度98質量%の硫酸25mlに対して1g/100mlになるように溶解し、オストワルド型粘度計を用いて25℃での流下時間(T1)を測定した。引き続き、濃度98質量%の硫酸のみの流下時間(T2)を測定した。T2に対するT1の比、すなわちT1/T2を硫酸相対粘度とした。
JIS L1013に準じ総繊度および単糸繊度を測定した。繊維試料を、1/30(g)の張力で枠周1.125mの検尺機にて200回巻かせを作成する。105℃で60分乾燥しデシケーターに移し、20℃55RH環境下で30分放冷し、かせの重量を測定して得られた値から10000m当たりの重量を算出し、公定水分率を4.5%として繊維の総繊度を算出した。測定は4回行い、平均値を総繊度とした。また、総繊度をフィラメント数で除した値を単糸繊度とした。
示差走査熱量計(DSC)にTA Instrument社製Q1000を用いて熱分析を行い、Universal Analysis2000にてデータ処理を実施した。熱分析は窒素流下(50mL/min)で、温度範囲-50~270℃、昇温速度2℃/min、温度変調周期60秒、温度変調振幅±1℃、試料重量約5g(熱量データは測定後重量で規格化)にて測定を実施した。段状の基線のずれとして観測される吸熱ピーク温度をガラス転移温度(Tg)とした。
繊維試料を50cmのループにし、繊度の1/30(g)の初荷重を掛けて長さAを求め、次いでフリーにして沸騰水中に30分間浸漬した後、自然乾燥し、再び繊度の1/30(g)の初荷重を掛けて長さBを求め、次の式で沸騰水収縮率(B)を算出した。
沸騰水収縮率(B)(%)=〔(A-B)/A〕×100
カネボウエンジニアリング社製KE-2型熱収縮応力測定機を用い、巻き取ったパッケージから解舒した繊維糸条を結び周長16cmのループとし、糸条の繊度の1/30gの初荷重を掛け、室温から210℃まで昇温速度100℃/分で温度変化させたときの熱応力を測定して、得られた熱応力曲線のピーク値(最大値)を熱収縮応力(H)とした。また、巻き取ったパッケージから解舒した繊維糸条を結び周長16cmのループとし、無荷重の状態で、20℃、相対湿度65%に24時間保持し、その後、糸条の繊度の1/30gの初荷重を掛け、室温から210℃まで昇温速度100℃/分で熱応力を測定して、得られた熱応力曲線のピーク値を経時熱収縮応力(H2)とした。
NMR測定から結晶性ポリアミドと非晶性ポリアミドの繰り返し比を、質量分析からそれぞれのポリアミドの繰り返し単位の質量数を算出し、重量比率を求めた。
(a)NMR測定
核磁気共鳴分光法(1H-NMR)を用いテトラメチルシラン(TMS)を内部標準物質(0ppm)として測定した。アミド結合を形成するカルボキシル基のα位の水素に由来するシグナル(通常3ppm付近)のピーク面積(A)と、芳香族炭化水素に由来するシグナル(通常7ppm付近)のピーク面積(B)から結晶性ポリアミドと非晶性ポリアミドの繰り返し比を求める(A=結晶性ポリアミドの繰り返し数×2+非晶性ポリアミドの繰り返し数×2、B=非晶性ポリアミドの繰り返し数×4)。
(b)質量分析
マトリックス支援レーザー脱離イオン化質量分析(MALDI-MS)、飛行時間型質量分析法(TOF-MS)、飛行時間型マトリックス支援レーザー脱離イオン化質量分析(MALDI-TOF-MS)を用い繰り返し単位の質量数を決定した。
(c)重量比率
結晶性ポリアミドの重量比率(%)=(A/2)×(結晶性ポリアミドの質量数)
非晶性ポリアミドの重量比率(%)=(A/2-B/4)×(非晶性ポリアミドの質量数)
糸条をRuO4蒸気に曝し、糸と包埋樹脂との境界を明確にするためのコートをする。その後、樹脂に包埋し、薄切片を製作、リンタングステン酸(PTA)水溶液で15min染色する。以上のようにして得られた観察対象物を、透過型電子顕微鏡(日立製作所社製H-7100)を用い、加圧電圧100kVで薄切片を観察した。観察倍率は3000倍で繊維横断面を観察した。TEM観察結果において、直径10nm以上の分散相を有する海島の相分離構造が観察されたときは非相溶系(×;incompatible)、直径10nm以上の分散相を有する海島の相分離構造が観察されなかったときは相溶系(○;compatible)と判定した。
繊維試料をオリエンテック(株)製“TENSILON”(登録商標)、UCT-100でJIS L1013(化学繊維フィラメント糸試験方法、2010年)に示される定速伸長条件で測定した。伸度は、引張強さ-伸び曲線における最大強力を示した点の伸びから求めた。また、強度は、最大強力を繊度で除した値を強度とした。測定は10回行い、平均値を強度および伸度とした。
繊維試料を、Zellweger Uster社製 USTER TESTER IIIで、試料長:250m、測定糸速度:50m/min、測定レンジ(12.5%HI)で1/2Inertにて4回測定し、その平均値をU%値とした。
(a)ナイロン6糸条の製造
相対粘度2.70のポリカプロラクタム(N6)を使用し、口金吐出孔を60個有する紡糸口金から紡糸温度275℃で溶融吐出させた。溶融吐出させた後、糸条を冷却、給油、交絡した後に2560m/minのゴデローラーで引き取り、続いて1.7倍に延伸した後に155℃で熱固定し、巻取速度4000m/minで80dtex60フィラメントのナイロン6糸条を得た。なお、得られたナイロン6糸条は、繊度78.8dtex、強度4.0cN/dtex、伸度59%、沸騰水収縮率10%、熱収縮応力0.09cN/dtexであった。
(b)混繊糸の製造
上記(a)で得られたナイロン6糸条と実施例1~7および比較例1~6で得られたポリアミド糸条を、インターレース加工機を用いて、交絡圧2.0kg/cm2の交絡処理を施して混繊加工を行い、113dtexもしくは122dtexの混繊糸を得た。
(c)筒編地作製
上記(b)で得られた混繊糸試料を、筒編機にて度目50となるように調整して筒編地を作製した。
得られた筒編地を80℃で20分精練を行い、続いてKayanol Yellow N5G 1%owf、酢酸を用いてpH4に調整し、100℃で30分間染色を行い、その後、80℃で20分間Fix処理を行い、最後に風合いの改良のため170℃で30秒間熱処理を行った。
(d)編物評価
上記(c)で得られた筒編地を熟練技術者(5名)の触感により嵩高感(ふくらみ感)について、以下の5段階で実施した。各技術者の評価点の平均値の小数点一桁を四捨五入して、5点を◎(excellent)、4点を○(good)、3点を△(fair)、1~2点を×(poor)とした。
5点:非常に優れる
4点:やや優れる
3点:どちらでもない
2点:やや劣る
1点:劣る
(a)経糸の製造
相対粘度2.70のポリカプロラクタム(N6)を使用し、口金吐出孔を20個有する紡糸口金から紡糸温度275℃で溶融吐出させた。溶融吐出させた後、糸条を冷却、給油、交絡した後に2560m/minのゴデローラーで引き取り、続いて1.7倍に延伸した後に155℃で熱固定し、巻取速度4000m/minで22dtex20フィラメントのナイロン6糸条を得た。
(b)織物の製造
上記(a)で得られたナイロン6糸条を経糸(経糸密度90本/2.54cm)に用い、実施例および比較例で得られたポリアミド糸条を緯糸に用い平織物を製織した(目付け40g/cm2)。
得られた織物を80℃で20分精練を行い、続いてKayanol Yellow N5G 1%owf、酢酸を用いてpH4に調整し、100℃で30分間染色を行い、その後、80℃で20分間Fix処理を行い、最後に風合いの改良のため170℃で30秒間熱処理を行った。
(c)織物評価
上記(b)で得られた織物を熟練技術者(5名)の触感により高密度感、ソフト感およびふくらみ感それぞれについて、以下の5段階で実施した。各技術者の評価点の平均値の小数点一桁を四捨五入して、5点を◎(excellent)、4点を○(good)、3点を△(fair)、1~2点を×(poor)とした。
5点:非常に優れる
4点:やや優れる
3点:どちらでもない
2点:やや劣る
1点:劣る
結晶性ポリアミドとしてポリカプロラクタム(N6)(相対粘度ηr:2.62、融点222℃)と、非結晶性ポリアミドとしてイソフタル酸(6I)/テレフタル酸(6T)/ヘキサメチレンジアミンの重縮合体でイソフタル酸/テレフタル酸の共重合比率が7/3の共重合体(相対粘度ηr:2.10)を、結晶性ポリアミド/非結晶性ポリアミドの重量比が70/30で単軸エクストルーダーを用い265℃で溶融混練し、26孔、丸孔の吐出孔を有する紡糸口金を用いて溶融吐出した(紡糸温度:265℃)。溶融吐出させた後、糸条を冷却、給油、交絡した後に1500m/minの第1ゴデローラー(延伸温度:150℃)で引き取り、続いて2.4倍に延伸した後に165℃で熱固定し、巻取速度3500m/minで33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.46、ガラス転移温度(Tg):91℃)を得た。
結晶性ポリアミド/非結晶性ポリアミドの重量比を85/15としたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.54、ガラス転移温度(Tg):87℃)を得た。
結晶性ポリアミド/非結晶性ポリアミドの重量比を55/45としたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.39、ガラス転移温度(Tg):92℃)を得た。
結晶性ポリアミドとして、ポリヘキサメチレンアジパミド(N66)(相対粘度ηr:2.80、融点263℃)を用い、紡糸温度を285℃に変更したこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.59、ガラス転移温度(Tg):92℃)を得た。
結晶性ポリアミドとして、ポリヘキサメチレンセバシミド(N610)(相対粘度ηr:2.80、融点219℃)を用いたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.59、ガラス転移温度(Tg):93℃)を得た。
延伸倍率を2.8倍にしたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.59、ガラス転移温度(Tg):92℃)を得た。
結晶性ポリアミド/非結晶性ポリアミドの重量比を85/15としたこと、吐出量を変更したこと以外は、実施例1と同様に紡糸を実施し、54dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.54、ガラス転移温度(Tg):85℃)を得た。
結晶性ポリアミド/非結晶性ポリアミドの重量比を95/5とした以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.59、ガラス転移温度(Tg):22℃)を得た。
結晶性ポリアミド/非結晶性ポリアミドの重量比を30/70とした以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.26、ガラス転移温度(Tg):23℃)を得た。
2軸エクストルーダーを用い溶融混練したこと、第1ゴデローラーを非加熱(延伸温度:室温)にしたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.96、ガラス転移温度(Tg):102℃)を得た。
2軸エクストルーダーを用い溶融混練したこと、第1ゴデローラーの延伸温度を90℃にしたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.96、ガラス転移温度(Tg):102℃)を得た。
結晶性ポリアミドとして、ポリカプロラクタムとヘキサメチレンアジパミドの共重合体でポリカプロラクタムとヘキサメチレンアジパミドの共重合比率が85/15の共重合体(N6/N66共重合体)(相対粘度ηr:2.69、融点:198℃)を用いたこと、第1ゴデローラーの延伸温度を120℃にしたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.66、ガラス転移温度(Tg):29℃)を得た。
結晶性ポリアミドとして、ポリカプロラクタム(N6)(相対粘度ηr:2.62、融点:222℃)と、ナイロンMXD6(三菱ガス化学製、相対粘度ηr:2.70、融点:237℃)を、ポリカプロラクタム/ナイロンMXD6重量比を50/50としたこと、第1ゴデローラーの延伸温度を85℃にしたこと以外は、実施例1と同様に紡糸を実施し、33dtex26フィラメントのポリアミド糸条(相対粘度ηr:2.66、ガラス転移温度(Tg):32℃)を得た。
Claims (4)
- ガラス転移温度(Tg)が85~95℃であって、沸騰水収縮率(B)が25~50%、熱収縮応力(H)が0.20cN/dtex以上であることを特徴とする高熱収縮性ポリアミド繊維。
- 総繊度が5~80dtexであり、単糸繊度が0.9~3.0dtexであることを特徴とする請求項1記載の高熱収縮性ポリアミド繊維。
- 混繊糸の少なくとも一部に請求項1または2に記載の高熱収縮性ポリアミド繊維を用いることを特徴とする混繊糸。
- 織編物の少なくとも一部に請求項1または2に記載の高熱収縮性ポリアミド繊維および/または請求項3に記載の混繊糸を用いることを特徴とする織編物。
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JP2018138706A (ja) * | 2017-02-24 | 2018-09-06 | 東レ株式会社 | 高熱収縮性ポリアミド繊維、混繊糸および織編物 |
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CN111621904B (zh) * | 2019-02-28 | 2021-12-31 | 福懋兴业股份有限公司 | 包含尼龙6,6卷缩纤维的弹性布料及其制造方法 |
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