US20160122906A1 - Polyurethane urea elastic yarn having excellent uniformity and thermosetting property - Google Patents
Polyurethane urea elastic yarn having excellent uniformity and thermosetting property Download PDFInfo
- Publication number
- US20160122906A1 US20160122906A1 US14/893,033 US201414893033A US2016122906A1 US 20160122906 A1 US20160122906 A1 US 20160122906A1 US 201414893033 A US201414893033 A US 201414893033A US 2016122906 A1 US2016122906 A1 US 2016122906A1
- Authority
- US
- United States
- Prior art keywords
- yarn
- polyurethane urea
- elastic yarn
- cross
- urea elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920003226 polyurethane urea Polymers 0.000 title claims abstract description 53
- 229920001187 thermosetting polymer Polymers 0.000 title abstract description 21
- LFSYUSUFCBOHGU-UHFFFAOYSA-N 1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=CC=C1N=C=O LFSYUSUFCBOHGU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 238000009987 spinning Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229920005862 polyol Polymers 0.000 claims description 9
- 150000003077 polyols Chemical class 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000691 measurement method Methods 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 239000004970 Chain extender Substances 0.000 abstract description 11
- 230000006866 deterioration Effects 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000004383 yellowing Methods 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 12
- -1 diisocyanate compound Chemical class 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- QECMKBLFWBJHOM-UHFFFAOYSA-N [HH].[W] Chemical compound [HH].[W] QECMKBLFWBJHOM-UHFFFAOYSA-N 0.000 description 2
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 150000004985 diamines Chemical group 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 150000002009 diols Chemical class 0.000 description 2
- 238000000578 dry spinning Methods 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- LJPCNSSTRWGCMZ-UHFFFAOYSA-N 3-methyloxolane Chemical compound CC1CCOC1 LJPCNSSTRWGCMZ-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002334 Spandex Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- GHWVXCQZPNWFRO-UHFFFAOYSA-N butane-2,3-diamine Chemical compound CC(N)C(C)N GHWVXCQZPNWFRO-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- VKIRRGRTJUUZHS-UHFFFAOYSA-N cyclohexane-1,4-diamine Chemical compound NC1CCC(N)CC1 VKIRRGRTJUUZHS-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
Classifications
-
- 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
- D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/04—Dry spinning methods
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
-
- 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
- D01F6/72—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyureas
-
- 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
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
-
- 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
- D10B2401/046—Shape recovering or form memory
-
- 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
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
Definitions
- the present invention relates to a polyurethane urea elastic yarn having excellent uniformity and thermosetting property and, more particularly, to a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that uses 2 to 25 mol. % of 2,4′-diphenylmethane diisocyanate in combination with at least one diisocyanate including 4,4′-diphenylmethane diisocyanate in the preparation of a polyurethane prepolymer and include at least 40 wt. % of the solid content in the final polyurethane urea polymer.
- polyurethane urea elastic yarn is obtained by reacting a polyol and an excess of a diisocyanate compound to form a first polymerization reactant that is a prepolymer having isocyanate groups at both ends of the polyol, dissolving the prepolymer in an appropriate solvent, adding a diamine- or diol-based chain extender to the resultant solution, adding a chain terminator such as mono-alcohol, mono-amine, etc. to produce a spinning solution for polyurethane urea yarn, and then performing dry and wet spinning procedures to obtain a polyurethane urea elastic yarn.
- the polyurethane urea elastic yarn is widely available in various uses. As the use of the polyurethane urea elastic yarn extends in its range, there is a consistent demand for additional properties to the existing polyurethane urea fibers.
- the polyurethane urea elastic yarn is woven in combination with relative yarns that are sensitive to heat (e.g., nylon, silk, cotton, etc.)
- the relative yarns are susceptible to thermal embrittlement under a high-temperature heat treatment for thermosetting during the post-process conducted after the blend knitting process, causing the fabric material to exhibit yellowing and deterioration of touch.
- U.S. Pat. No. 5,948,875 discloses using at least 50 mol. % of 2-methyl-LS-pentane diamine as a chain extender;
- U.S. Pat. No. 6,472,494 describes using 23 to 55 mol % of 2,4′-diphenyl methane diisocyanate;
- Korean Patent No. 0,942,359 filed by the present company discloses using 2 to 25 mol. % of 2,4′-diphenyl methane diisocyanate and adding 1,2-diaminopropane as an auxiliary chain extender.
- a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that is comprised of a polyol and diisocyanate polymer, the elastic yarn being produced by
- the polyurethane urea elastic yarn may contain 75 to 98 mol. % of a first diisocyanate and 2 to 25 mol. % of a second diisocyanate, where the second diisocyanate is 2,4′-diphenyl methane diisocyanate.
- 2,4′-diphenyl methane diisocyanate has such a steric hindrance that weakens the intermolecular hydrogen bonding force and the intramolecular hydrogen bonding force of the hard segment. This has the same effect to increase the soft segment content and thus enhance the thermosetting property of the yarn.
- the final polyurethane urea polymer may have a solid content of at least 40 wt. %.
- the solid content is 40 wt. % or greater, the difference between the drying rate of the yarn surface and the solvent diffusion rate of the inside/surface of the yarn during the spinning process can be reduced to make the cross section of the yarn nearly circular, consequently with the cross section ratio close to 1.0.
- the uniformity of the yarn improves as the yarn has the cross section ratio nearer to 1.0.
- the polyurethane urea elastic yarn of the present invention may have a cross section ratio of 1.20 or less, an Uster % of less than 1.0 and a heat set efficiency (HSE) of 50% or greater after a dry heat treatment at 170° C.
- HSE heat set efficiency
- the present invention enables production of a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that displays no deterioration in uniformity, securing good fabric quality, and enables thermosetting at low temperature to prevent thermal embrittlement of the relative yarn, resulting in excellent yellowing and touch of the union/knitted yarn.
- An elastic yarn according to an embodiment of the present invention may be prepared by polymerizing a polyol and an excess of diisocyanate to obtain a prepolymer, dissolving the prepolymer in an organic solvent, and then adding a chain extender and a chain terminator to the resultant solution to perform a second polymerization and prepare a spinning solution.
- the chain extender and the chain terminator are added at once in a single step or separately in at least two steps.
- diisocyanate as used in the preparation of the polyurethane urea elastic yarn of the present invention may include 4,4′-diphenyl methane diisocyanate, 1,5′-naphthalene diisocyanate, 1,4′ -phenylene diisocyanate, hexamethylene diisocyanate, 1,4′-cyclohexane diisocyanate, 4,4′-dicyclohexyl methane diisocyanate, isophorone diisocyanate, etc.
- 2,4′-diphenyl methane diisocyanate can be used in combination with at least one diisocyanate including 4,4′-diphenyl methane diisocyanate.
- the content of 2,4′-diphenyl methane diisocyanate is in the range of 2 to 25 mol. %.
- 2,4′-diphenyl methane diisocyanate which has a steric conformation relative to 4,4′-diphenyl methane diisocyanate, provides such a steric hindrance that weakens the intermolecular hydrogen bonding force and the intramolecular hydrogen bonding force of the hard segment. This has the same effect to increase the soft segment content and thus enhance the thermosetting property of the yarn.
- polyol as used in the present invention may include polytetramethylene ether glycol, polytrimethylene ether glycol, polypropylene glycol, polycarbonate diol, a copolymer of a mixture of alkylene oxide and lactone monomer and poly(tetramethylene ether)glycol, a copolymer of 3-methyl-tetrahydrofuran and tetrahydrofurn, etc., which are used alone or as a mixture of at least two. But, the polyol may not be specifically limited to these examples.
- the isocyanate of the prepolymer in the present invention preferably has a weight percentage of 1.7 to 4.1% for the sake of realizing properties suitable to the polymerurethane urea elastic yarn.
- the weight percentage of the isocyanate in the prepolymer less than 1.7% or greater than 4.1% may result in serous deterioration in the properties of the elastic yarn.
- the chain extender is diamines.
- the diamines may include ethylene diamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminopbutane, 2,3-diaminobutane, 1,5-diaminopentane, 1,6-hexamethylenediamine, 1,4-cyclohexane diamine, etc., which may be used alone or as a mixture of at least two.
- the chain exterminator of the polyurethane urea is an amine having one functional group.
- amine may include diethyl amine, mono-ethanol amine, dimethyl amine, etc.
- the present invention is characterized by the fact that the final polyurethane urea polymer has a solid content of at least 40 wt. %.
- the solid content is 40 wt. % or greater, the difference between the surface diffusion rate of the solvent in the yarn and the drying rate of the solvent on the surface of the yarn during the spinning process decreases due to lower solvent content relative to the solid content, thereby a more uniform drying is achieved, making the cross section of the polyurethane urea elastic yarn nearly circular, which means that the cross section ratio approaches 1.0.
- the elastic yarn has a circular cross section with more uniform to improve the Uster %. Knitting a union/knitted fabric or performing a dyeing process using such an elastic yarn can enhance the fabric quality.
- the present invention may add an appropriate combination of a steric hindrance phenol compound, a benzofuran-one compound, a semi-carbizide compound, a benzo triazole compound, a polymeric tertiary amine stabilizer, etc. to the spinning solution, in order to prevent discoloration or property deterioration of the polyurethane urea possibly caused by UV radiations, smog, and the heat treatment pertaining to the spandex process.
- polyurethane urea elastic yarn of the present invention may further include an additive, such as titanium dioxide, magnesium stearate, etc., in addition to the above-mentioned components.
- NCO % [100 ⁇ 2 ⁇ NCO chemical formula weight ⁇ (capping ratio ⁇ 1)]/ [(molecular weight of diisocyanate ⁇ capping ratio)+molecular weight of polyol]
- the capping ratio is defined as the molar ratio of diisocyanate to polyol.
- An automatic strength/elongation testing device (MEL series, Textechno Inc.) is used to measure strength and elongation properties of the yarn with a 10cm long sample at a tensile speed of 100 cm/min. The strength at break and the elongation are measured, and the load on the yarn at 200% elongation (i.e., 200% modulus) is also determined.
- the yarn is cut vertically in the lengthwise direction.
- the width W and the length H are measured using a microscope to determine the width-to-length ratio.
- the cross section is considered to be more circular with more uniformity as the width-to-length ratio is closer to 1.0.
- W is the length of the longest straight line crossing the cross section of the yarn
- a Uster % testing device (KET-QT) is used to measure the Uster % by varying the speed of the feeding roller depending on the de of the yarn (30 m/min for 20 d).
- the thickness of a yarn unwound at a constant speed for 20 seconds is automatically checked by a sensor and averaged to draw a 0% reference line.
- a point is put in the positive (+) region above the 0% reference line.
- a point is put in the negative ( ⁇ ) region below the 0% reference line.
- the degree of each point deviating from the 0% reference line is calculated in terms of area, which is expressed as U %.
- the lower U % indicates the yarn with more excellent uniformity.
- an initial yarn (L0) is elongated by 100% (L1), subjected to a dry heat treatment at 170° C. for one minute, cooled down to the room temperature, and then measured in regards to the length (L2).
- the yarn which gets loose under dry heat treatment, is subjected to a wet heat treatment at 100° C. for 30 minutes, dried at the room temperature, and then measured in regards to the length (L3).
- L0, L1, L2, and L3 indicate the length of the yarn after each process (treatment).
- the length of the yarn measured by performing a wet heat treatment at 100° C. for 30 minutes while the yarn is loose after dry heat treatment and then drying at the room temperature.
- HSE (%) ⁇ ( L 3 ⁇ L 0)/( L 1 ⁇ L 0) ⁇ 100
- the spinning solution thus obtained is subjected to dry spinning at 900 m/min to form a 20-denier 1-filament polyurethane urea elastic yarn.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- Example 2 The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 85 mol. % of 4,4′-diphenyl methane diisocyanate and 15 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- Example 1 The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 75 mol. % of 4,4′-diphenyl methane diisocyanate and 25 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- Example 1 The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 70 mol. % of 4,4′-diphenyl methane diisocyanate and 30 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- Example 3 The procedures are performed in the same manner as described in Example 3 to prepare a polyurethane urea elastic yarn, excepting that the solid content of the final polymer is 35 wt. %.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- Example 1 The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 100 mol. % of 4,4′-diphenyl methane diisocyanate is used.
- the elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
Abstract
Description
- The present invention relates to a polyurethane urea elastic yarn having excellent uniformity and thermosetting property and, more particularly, to a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that uses 2 to 25 mol. % of 2,4′-diphenylmethane diisocyanate in combination with at least one diisocyanate including 4,4′-diphenylmethane diisocyanate in the preparation of a polyurethane prepolymer and include at least 40 wt. % of the solid content in the final polyurethane urea polymer.
- In general, polyurethane urea elastic yarn is obtained by reacting a polyol and an excess of a diisocyanate compound to form a first polymerization reactant that is a prepolymer having isocyanate groups at both ends of the polyol, dissolving the prepolymer in an appropriate solvent, adding a diamine- or diol-based chain extender to the resultant solution, adding a chain terminator such as mono-alcohol, mono-amine, etc. to produce a spinning solution for polyurethane urea yarn, and then performing dry and wet spinning procedures to obtain a polyurethane urea elastic yarn.
- With the inherent properties such as excellent elasticity and elastic recovery property, the polyurethane urea elastic yarn is widely available in various uses. As the use of the polyurethane urea elastic yarn extends in its range, there is a consistent demand for additional properties to the existing polyurethane urea fibers.
- Generally, when the polyurethane urea elastic yarn is woven in combination with relative yarns that are sensitive to heat (e.g., nylon, silk, cotton, etc.), the relative yarns are susceptible to thermal embrittlement under a high-temperature heat treatment for thermosetting during the post-process conducted after the blend knitting process, causing the fabric material to exhibit yellowing and deterioration of touch. As a solution to this problem, there is an increasing demand for a polyurethane urea elastic yarn capable of thermosetting even at low temperature, and sustained attempts have been made by many manufacturers of elastic yarns to enhance the thermosetting property of the polyurethane urea elastic yarn.
- As for the methods of improving the thermosetting property of the polyurethane urea elastic yarn, for example, U.S. Pat. No. 5,948,875 discloses using at least 50 mol. % of 2-methyl-LS-pentane diamine as a chain extender; U.S. Pat. No. 6,472,494 describes using 23 to 55 mol % of 2,4′-diphenyl methane diisocyanate; and Korean Patent No. 0,942,359 filed by the present company discloses using 2 to 25 mol. % of 2,4′-diphenyl methane diisocyanate and adding 1,2-diaminopropane as an auxiliary chain extender. But, the techniques disclosed by these patents may cause deterioration in the thermal resistance and insufficient modulus and elastic recovery, reducing the tension of the yarn and increasing the float of the yarn during the spinning process to display poor spinning workability and poor uniformity of the yarn, which contributes to poor fabric quality in the case of union/knitted fabrics.
- In other words, it is the current situation that there exists no established technique of manufacturing a polyurethane urea elastic yarn having excellent uniformity and thermosetting property at the same time.
- To solve the problems with the prior art, in accordance with a preferred embodiment of the present invention, there is provided a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that is comprised of a polyol and diisocyanate polymer, the elastic yarn being produced by
- (1) preparing a prepolymer using a mixture containing 2 to 25 mol. % of 2,4′-diphenyl methane diisocyanate with respect to the total weight of diisocyanate;
- (2) adding a chain extender to the prepolymer to yield a polyurethane urea polymer; and
- (3) preparing a polyurethane urea spinning solution having a solid content of at least 40 wt. % in the final polyurethane urea polymer and spinning the solution.
- In accordance with another preferred embodiment of the present invention, the polyurethane urea elastic yarn may contain 75 to 98 mol. % of a first diisocyanate and 2 to 25 mol. % of a second diisocyanate, where the second diisocyanate is 2,4′-diphenyl methane diisocyanate. With its steric conformation relative to 4,4′-diphenyl methane diisocyanate, 2,4′-diphenyl methane diisocyanate has such a steric hindrance that weakens the intermolecular hydrogen bonding force and the intramolecular hydrogen bonding force of the hard segment. This has the same effect to increase the soft segment content and thus enhance the thermosetting property of the yarn.
- In accordance with still another preferred embodiment of the present invention, the final polyurethane urea polymer may have a solid content of at least 40 wt. %. When the solid content is 40 wt. % or greater, the difference between the drying rate of the yarn surface and the solvent diffusion rate of the inside/surface of the yarn during the spinning process can be reduced to make the cross section of the yarn nearly circular, consequently with the cross section ratio close to 1.0. The uniformity of the yarn improves as the yarn has the cross section ratio nearer to 1.0.
- The polyurethane urea elastic yarn of the present invention may have a cross section ratio of 1.20 or less, an Uster % of less than 1.0 and a heat set efficiency (HSE) of 50% or greater after a dry heat treatment at 170° C.
- The present invention enables production of a polyurethane urea elastic yarn having excellent uniformity and thermosetting property that displays no deterioration in uniformity, securing good fabric quality, and enables thermosetting at low temperature to prevent thermal embrittlement of the relative yarn, resulting in excellent yellowing and touch of the union/knitted yarn.
- Hereinafter, a detailed description will be given as to the polyurethane urea elastic yarn of the present invention. The embodiment of the present invention can be modified in various forms and the range of the present invention is not limited to the embodiments hereinafter described. Throughout this specification, unless the context requires otherwise, the word “comprise”, “includes” or variations will be understood to imply to inclusion of any other component in addition to the stated one.
- An elastic yarn according to an embodiment of the present invention may be prepared by polymerizing a polyol and an excess of diisocyanate to obtain a prepolymer, dissolving the prepolymer in an organic solvent, and then adding a chain extender and a chain terminator to the resultant solution to perform a second polymerization and prepare a spinning solution. In this regard, the chain extender and the chain terminator are added at once in a single step or separately in at least two steps.
- Specific examples of the diisocyanate as used in the preparation of the polyurethane urea elastic yarn of the present invention may include 4,4′-diphenyl methane diisocyanate, 1,5′-naphthalene diisocyanate, 1,4′ -phenylene diisocyanate, hexamethylene diisocyanate, 1,4′-cyclohexane diisocyanate, 4,4′-dicyclohexyl methane diisocyanate, isophorone diisocyanate, etc. Among these diisocyanates, 2,4′-diphenyl methane diisocyanate can be used in combination with at least one diisocyanate including 4,4′-diphenyl methane diisocyanate. In this case, the content of 2,4′-diphenyl methane diisocyanate is in the range of 2 to 25 mol. %.
- 2,4′-diphenyl methane diisocyanate, which has a steric conformation relative to 4,4′-diphenyl methane diisocyanate, provides such a steric hindrance that weakens the intermolecular hydrogen bonding force and the intramolecular hydrogen bonding force of the hard segment. This has the same effect to increase the soft segment content and thus enhance the thermosetting property of the yarn.
- When the content of 2,4′-diphenyl methane diisocyanate is less than 2 mol. %, it is too insignificant to make the effect to enhance the thermosetting property. When the content of 2,4′-diphenyl methane diisocyanate is greater than 25 mol. %, the modulus of the yarn abruptly decreases. It is therefore preferable that the content of 2,4′-diphenyl methane diisocyanate is within the defined range.
- Specific examples of the polyol as used in the present invention may include polytetramethylene ether glycol, polytrimethylene ether glycol, polypropylene glycol, polycarbonate diol, a copolymer of a mixture of alkylene oxide and lactone monomer and poly(tetramethylene ether)glycol, a copolymer of 3-methyl-tetrahydrofuran and tetrahydrofurn, etc., which are used alone or as a mixture of at least two. But, the polyol may not be specifically limited to these examples.
- The isocyanate of the prepolymer in the present invention preferably has a weight percentage of 1.7 to 4.1% for the sake of realizing properties suitable to the polymerurethane urea elastic yarn. The weight percentage of the isocyanate in the prepolymer less than 1.7% or greater than 4.1% may result in serous deterioration in the properties of the elastic yarn.
- The chain extender is diamines. Specific examples of the diamines may include ethylene diamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminopbutane, 2,3-diaminobutane, 1,5-diaminopentane, 1,6-hexamethylenediamine, 1,4-cyclohexane diamine, etc., which may be used alone or as a mixture of at least two.
- The chain exterminator of the polyurethane urea is an amine having one functional group.
- Specific examples of the amine may include diethyl amine, mono-ethanol amine, dimethyl amine, etc.
- The present invention is characterized by the fact that the final polyurethane urea polymer has a solid content of at least 40 wt. %. When the solid content is 40 wt. % or greater, the difference between the surface diffusion rate of the solvent in the yarn and the drying rate of the solvent on the surface of the yarn during the spinning process decreases due to lower solvent content relative to the solid content, thereby a more uniform drying is achieved, making the cross section of the polyurethane urea elastic yarn nearly circular, which means that the cross section ratio approaches 1.0. As the cross section ratio is closer to 1.0, the elastic yarn has a circular cross section with more uniform to improve the Uster %. Knitting a union/knitted fabric or performing a dyeing process using such an elastic yarn can enhance the fabric quality.
- In addition, the present invention may add an appropriate combination of a steric hindrance phenol compound, a benzofuran-one compound, a semi-carbizide compound, a benzo triazole compound, a polymeric tertiary amine stabilizer, etc. to the spinning solution, in order to prevent discoloration or property deterioration of the polyurethane urea possibly caused by UV radiations, smog, and the heat treatment pertaining to the spandex process.
- Furthermore, the polyurethane urea elastic yarn of the present invention may further include an additive, such as titanium dioxide, magnesium stearate, etc., in addition to the above-mentioned components.
- Hereinafter, the present invention will be described in further detail with reference to the specific examples, which are given to exemplify the present invention and not construed to limit the scope of the present invention.
- The measurement methods for NCO % of the polymer and the properties of the polyurethane urea elastic yarn are given as follows.
- NCO % Measurement Method
-
NCO %=[100×2×NCO chemical formula weight×(capping ratio−1)]/ [(molecular weight of diisocyanate×capping ratio)+molecular weight of polyol] - In the above equation, the capping ratio is defined as the molar ratio of diisocyanate to polyol.
- Strength and Elongation of Yarn
- An automatic strength/elongation testing device (MEL series, Textechno Inc.) is used to measure strength and elongation properties of the yarn with a 10cm long sample at a tensile speed of 100 cm/min. The strength at break and the elongation are measured, and the load on the yarn at 200% elongation (i.e., 200% modulus) is also determined.
- Cross Section Ratio of Yarn
- The yarn is cut vertically in the lengthwise direction. With the cross section, the width W and the length H are measured using a microscope to determine the width-to-length ratio. The cross section is considered to be more circular with more uniformity as the width-to-length ratio is closer to 1.0.
-
Cross Section Ratio=W/H - In the equation, W is the length of the longest straight line crossing the cross section of the yarn;
-
- and H is the length of the shortest straight line perpendicular to the longest straight line crossing the cross section of the yarn.
- U % of Yarn
- A Uster % testing device (KET-QT) is used to measure the Uster % by varying the speed of the feeding roller depending on the de of the yarn (30 m/min for 20 d). The thickness of a yarn unwound at a constant speed for 20 seconds is automatically checked by a sensor and averaged to draw a 0% reference line. When the thickness of the yarn checked by the sensor every unit time is greater than the reference value, a point is put in the positive (+) region above the 0% reference line. When the thickness of the yarn checked by the sensor every unit time is less than the reference value, a point is put in the negative (−) region below the 0% reference line. The degree of each point deviating from the 0% reference line is calculated in terms of area, which is expressed as U %. The lower U % indicates the yarn with more excellent uniformity.
-
U %=(the area deviating from the 0% reference line)/(the area below the 0% reference line)×100 -
- Thermosetting Property of Yarn
- Exposed to the atmosphere, an initial yarn (L0) is elongated by 100% (L1), subjected to a dry heat treatment at 170° C. for one minute, cooled down to the room temperature, and then measured in regards to the length (L2). The yarn, which gets loose under dry heat treatment, is subjected to a wet heat treatment at 100° C. for 30 minutes, dried at the room temperature, and then measured in regards to the length (L3). In this regard, L0, L1, L2, and L3 indicate the length of the yarn after each process (treatment).
- The length of the yarn measured by performing a wet heat treatment at 100° C. for 30 minutes while the yarn is loose after dry heat treatment and then drying at the room temperature.
-
Dry thermosetting property (%)={(L2−L0)/(L1−L0)}×100 -
HSE (%)={(L3−L0)/(L1−L0)}×100 - 95 mol. % of 4,4′-diphenyl methane diisocyanate and 5 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together at a capping ratio (CR) of 1.80. To the mixture are added a chain extender, which contains 80 mol. % of ethylene diamine and 20 mol. % of 1,2-diaminopropane, and a chain extender, which is diethyl amine. The ratio of the chain extender to the chain terminator is 10:1. The amine is used in such an amount as to have the total amine concentration of 7 mol. %. Dimethylacetamide is used as a solvent to prepare a polyurethane urea spinning solution in which the solid content of the final polymer is 45 wt. %.
- The spinning solution thus obtained is subjected to dry spinning at 900 m/min to form a 20-denier 1-filament polyurethane urea elastic yarn. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 85 mol. % of 4,4′-diphenyl methane diisocyanate and 15 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 75 mol. % of 4,4′-diphenyl methane diisocyanate and 25 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 70 mol. % of 4,4′-diphenyl methane diisocyanate and 30 mol. % of 2,4′-diphenyl methane diisocyanate are mixed together. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- The procedures are performed in the same manner as described in Example 3 to prepare a polyurethane urea elastic yarn, excepting that the solid content of the final polymer is 35 wt. %. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
- The procedures are performed in the same manner as described in Example 1 to prepare a polyurethane urea elastic yarn, excepting that 100 mol. % of 4,4′-diphenyl methane diisocyanate is used. The elastic yarn is evaluated in regards to the properties, and the evaluation results are presented in Table 1.
-
TABLE 1 Example Comparative Example 1 2 3 4 1 2 First MDI/second MDI 95/5 85/15 75/25 70/30 75/25 100/0 NCO % 3.0 3.0 3.0 3.0 3.0 3.0 Solid content (%) of 45 45 45 45 35 45 final polymer Strength (g/d) 1.18 1.12 1.07 1.02 1.09 1.22 Elongation (%) 494 501 517 523 505 468 200% modulus (g) 4.0 3.8 3.4 2.7 3.7 4.1 Cross section ratio 1.20 1.12 1.08 1.06 1.31 1.64 U % 0.89 0.72 0.65 0.62 1.13 1.37 Dry heat set (%) 68.6 77.6 83.8 85.8 78.2 46.2 HSE (%) 48.4 57.4 64.2 66.6 58.2 23.8 - As can be seen from Table 1, using at least 25 mol. % of 2,4′-diphenyl methane diisocyanate leads to excellent uniformity and thermosetting property but deterioration in the 200% modulus. Further, when the final polymer contains 2 to 25 mol. % of 2,4′-diphenyl methane diisocyanate and has a solid content of less than 40 wt. %, the elastic yarn is excellent in the thermosetting property but poor in the cross section ratio and U %.
- Although a few exemplary embodiments of the present invention have been shown and described, the present invention is not limited to the described exemplary embodiments. Instead, it would be appreciated by those skilled in the art that changes may be made to these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
HSE (%)={(L3−L0)/(L1−L0)}×100.
Applications Claiming Priority (3)
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KR1020130098754A KR101426208B1 (en) | 2013-08-20 | 2013-08-20 | Polyurethaneurea elastic fiber with high uniformity and excellent heat settable property |
KR10-2013-0098754 | 2013-08-20 | ||
PCT/KR2014/004980 WO2015026051A1 (en) | 2013-08-20 | 2014-06-05 | Polyurethane urea elastic yarn having excellent uniformity and thermosetting property |
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US20160122906A1 true US20160122906A1 (en) | 2016-05-05 |
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US14/893,033 Abandoned US20160122906A1 (en) | 2013-08-20 | 2014-06-05 | Polyurethane urea elastic yarn having excellent uniformity and thermosetting property |
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US (1) | US20160122906A1 (en) |
JP (1) | JP6093090B2 (en) |
KR (1) | KR101426208B1 (en) |
CN (1) | CN105247121A (en) |
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US20210172090A1 (en) * | 2017-12-27 | 2021-06-10 | Hyosung TNC Corporation | Polyurethane urea elastic yarn having improved dyeability and manufacturing method therefor |
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CN114181373B (en) * | 2022-01-29 | 2023-08-11 | 万华化学集团股份有限公司 | Preparation process of comfortable spandex and prepared spandex |
CN115197391B (en) * | 2022-08-15 | 2023-10-31 | 河北邦泰氨纶科技有限公司 | Fiber-grade polyurethane slice and preparation method and application thereof |
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US5000899A (en) * | 1988-05-26 | 1991-03-19 | E. I. Du Pont De Nemours And Company | Spandex fiber with copolymer soft segment |
US20020193550A1 (en) * | 1999-12-03 | 2002-12-19 | Hiroshi Nishikawa | Spandex having low set at low temperatures |
US20070117953A1 (en) * | 2005-05-09 | 2007-05-24 | Invista North America S.A R.I. | Spandex from poly(tetramethylene-co-ethyleneether)glycols blended with polymeric glycols |
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JP3276475B2 (en) * | 1993-09-10 | 2002-04-22 | 旭化成株式会社 | Manufacturing method of high strength elastic yarn |
JPH07197318A (en) * | 1993-12-28 | 1995-08-01 | Asahi Chem Ind Co Ltd | Polyurethane polyurea elastic yarn having modified cross section and its production |
US6472494B2 (en) * | 2000-04-26 | 2002-10-29 | E. I. Du Pont De Nemours And Company | Spandex with high heat-set efficiency |
US7838617B2 (en) * | 2003-05-05 | 2010-11-23 | Invista North America S.àr.l. | Dyeable spandex |
JP4329019B2 (en) * | 2003-10-20 | 2009-09-09 | 東洋紡績株式会社 | Method for producing polyurethane elastic fiber |
KR101086744B1 (en) * | 2008-12-18 | 2011-11-24 | 주식회사 효성 | A Process for Preparing Polyurethaneurea Elastic Fiber with Excellent Heat Settable Property at Low Temperature |
KR101167377B1 (en) * | 2009-12-31 | 2012-07-19 | 주식회사 효성 | Process for Preparing polyurethaneurea elastic fiber with improved heat settable properties |
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2013
- 2013-08-20 KR KR1020130098754A patent/KR101426208B1/en active IP Right Grant
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2014
- 2014-06-05 WO PCT/KR2014/004980 patent/WO2015026051A1/en active Application Filing
- 2014-06-05 US US14/893,033 patent/US20160122906A1/en not_active Abandoned
- 2014-06-05 DE DE112014003380.4T patent/DE112014003380T5/en not_active Withdrawn
- 2014-06-05 CN CN201480028234.5A patent/CN105247121A/en active Pending
- 2014-06-05 JP JP2016513884A patent/JP6093090B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5000899A (en) * | 1988-05-26 | 1991-03-19 | E. I. Du Pont De Nemours And Company | Spandex fiber with copolymer soft segment |
US20020193550A1 (en) * | 1999-12-03 | 2002-12-19 | Hiroshi Nishikawa | Spandex having low set at low temperatures |
US20070117953A1 (en) * | 2005-05-09 | 2007-05-24 | Invista North America S.A R.I. | Spandex from poly(tetramethylene-co-ethyleneether)glycols blended with polymeric glycols |
Cited By (2)
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US20210172090A1 (en) * | 2017-12-27 | 2021-06-10 | Hyosung TNC Corporation | Polyurethane urea elastic yarn having improved dyeability and manufacturing method therefor |
US11629437B2 (en) * | 2017-12-27 | 2023-04-18 | Hyosung TNC Corporation | Polyurethane urea elastic yarn having improved dyeability and manufacturing method therefor |
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CN105247121A (en) | 2016-01-13 |
DE112014003380T5 (en) | 2016-06-02 |
WO2015026051A1 (en) | 2015-02-26 |
KR101426208B1 (en) | 2014-08-01 |
JP6093090B2 (en) | 2017-03-08 |
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