CN111733478B - Preparation method of high-elasticity polyurethane elastic fiber - Google Patents
Preparation method of high-elasticity polyurethane elastic fiber Download PDFInfo
- Publication number
- CN111733478B CN111733478B CN202010703280.8A CN202010703280A CN111733478B CN 111733478 B CN111733478 B CN 111733478B CN 202010703280 A CN202010703280 A CN 202010703280A CN 111733478 B CN111733478 B CN 111733478B
- Authority
- CN
- China
- Prior art keywords
- prepolymer
- polyurethane
- elastic fiber
- elasticity
- agent
- 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.)
- Active
Links
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 23
- 239000004814 polyurethane Substances 0.000 title claims abstract description 23
- 210000004177 elastic tissue Anatomy 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 18
- 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 claims abstract description 14
- 229920002334 Spandex Polymers 0.000 claims abstract description 13
- 239000004759 spandex Substances 0.000 claims abstract description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 12
- 229920000570 polyether Polymers 0.000 claims abstract description 12
- 238000009987 spinning Methods 0.000 claims abstract description 9
- 229920005862 polyol Polymers 0.000 claims abstract description 8
- 150000003077 polyols Chemical class 0.000 claims abstract description 8
- 229920003226 polyurethane urea Polymers 0.000 claims abstract description 7
- 239000004970 Chain extender Substances 0.000 claims abstract description 6
- 238000000578 dry spinning Methods 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 239000002216 antistatic agent Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 4
- 238000004043 dyeing Methods 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 4
- -1 polyoxypropylene Polymers 0.000 claims description 4
- 229920001451 polypropylene glycol Polymers 0.000 claims description 4
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 4
- 238000004383 yellowing Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- BMVXCPBXGZKUPN-UHFFFAOYSA-N 1-hexanamine Chemical compound CCCCCCN BMVXCPBXGZKUPN-UHFFFAOYSA-N 0.000 claims description 2
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002798 polar solvent Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 13
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000012948 isocyanate Substances 0.000 description 4
- 150000002513 isocyanates Chemical group 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 125000005462 imide group Chemical group 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XUMIQAOMRDRPMD-UHFFFAOYSA-N (6-oxo-1h-pyrimidin-2-yl)urea Chemical compound NC(=O)NC1=NC(=O)C=CN1 XUMIQAOMRDRPMD-UHFFFAOYSA-N 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test 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
- D01F6/88—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
- D01F6/94—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 other polycondensation products
-
- 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
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
-
- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to a preparation method of high-elasticity polyurethane elastic fiber, firstly, polyurethane prepolymers with different structures are prepared in a prepolymerization stage, wherein one prepolymer is prepared by mixing and heating diphenylmethane diisocyanate (MDI) and a first polyether polyol, and the other prepolymer is prepared by mixing and heating diphenylmethane diisocyanate (MDI) and a second polyether polyol; uniformly mixing the polyurethane prepolymers with different structures according to a certain mass ratio, and dissolving the mixture by using an aprotic polar solvent to obtain a prepolymer solution; then mixing the chain extender and the chain terminator with the prepolymer solution to form a polyurethane urea solution; adding the slurry into the prepared polyurethane urea solution, mixing uniformly and curing to form a spandex spinning solution; and finally, preparing the high-elasticity polyurethane elastic fiber by adopting dry spinning. The polyurethane elastic fiber has excellent elastic modulus and resilience, and can meet the requirements of some special fields on the high elasticity of the fiber.
Description
Technical Field
The invention belongs to the technical field of preparation of high polymer materials, and particularly relates to a preparation method of high-elasticity polyurethane elastic fibers. The polyurethane elastic fiber prepared by the invention has excellent elastic modulus and resilience, and can meet the requirements of some special fields on the high elasticity of the fiber.
Background
The polyurethane elastic fiber mainly comprises a soft segment formed by long-chain polyether or polyester and a hard segment formed by reaction of short-chain diamine and diisocyanate, and is widely applied to various garment materials. With the development of professional sports clothes, the market requires that the clothes are worn more comfortably and closely, higher requirements are provided for the elastic property of spandex fibers, and otherwise, the fabric is easy to lose elasticity and deform.
At present, aiming at the elasticity performance of spandex fibers, physical modification and chemical modification methods are mainly used. Patent CN200810116701.6 discloses a preparation method of polyether type high resilience spandex fiber and its product, which is characterized in that a certain amount of free MDI is added into prepolymer solution to improve the resilience of the fiber, but the free MDI can generate side reaction and be crystallized and separated out in low temperature environment, which affects spinnability. In patent CN109183188A, the imide structure is included in the molecular main chain of spandex by copolymerization of diol monomers including imide structure, which improves the strength, modulus and high temperature resistance of fiber, but the monomer has high cost, and is not suitable for large-scale industrial production. Patent CN201410054041.9 utilizes a free radical initiator to release decomposed free radicals under high temperature conditions to initiate polyurethane polymers to form intermolecular micro-crosslinking, and fiber products have high modulus characteristics, but the technology encounters the problems of instability of the free radical initiator, difficulty in controlling the degree of micro-crosslinking, and non-uniform dispersion in stock solution during production. Chinese patent CN103757741B improves the resilience of the fiber by physical crosslinking between hard segments of polyurethane through UPy (2-ureido-4 [1H ] -pyrimidone) type diamine chemical in the chain extender, but has the problem of stock solution storage stability.
Disclosure of Invention
The technical problem is as follows: aiming at the defects of the prior art, the invention provides a preparation method of high-elasticity polyurethane elastic fiber. The method has the advantages of stable and easily-controlled production process, solves the problems of storage stability and spinnability of the spinning solution in the prior art, and realizes the high elasticity performance of the polyurethane elastic fiber.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a method for preparing a high-elasticity polyurethane elastic fiber, comprising the steps of:
step one, reacting diphenylmethane diisocyanate (MDI) and polyether polyol according to a mass ratio of 1: 9.5-1: 13 to prepare a polyurethane prepolymer A;
step two, reacting diphenylmethane diisocyanate (MDI) and polyether polyol according to the mass ratio of 1: 11.9-1: 14.3 to prepare a polyurethane prepolymer B;
step three, mixing the polyurethane prepolymer A and the polyurethane prepolymer B to prepare a prepolymer C;
step four, dissolving the prepolymer C by using an organic solvent, and adding a chain extender and a chain terminator to form a polyurethane urea solution;
adding the sizing agent into the prepared polyurethane urea solution, and curing to form a spandex spinning solution;
and step six, preparing the high-elasticity polyurethane elastic fiber from the prepared spandex spinning solution by adopting a dry spinning technology.
Wherein:
the polyether glycol in the first step has a functionality of 2 and a number average molecular weight of 1000-2000.
The polyurethane prepolymer A in the first step has NCO% with the mass fraction of 2.4% -3.2%.
The polyether polyol in the second step has functionality of 3 and number average molecular weight of 700-3000 polyoxypropylene triol.
And the polyurethane prepolymer B in the step two has NCO% with the mass fraction of 2.2% -2.6%.
The mass ratio of the prepolymer A to the prepolymer B in the prepolymer C in the third step is 95: 5-80: 20.
The chain extender in the fourth step is one or more of ethylenediamine, propylenediamine and pentylenediamine; the chain terminator is one or more of diethylamine, n-hexylamine and ethanolamine.
The sizing agent in the fifth step contains chlorine-resistant agent, anti-yellowing agent, antioxidant, dyeing auxiliary agent, antistatic agent, delustering agent and lubricating and unwinding agent.
And the mass ratio of the polyurethane urea solid component to the slurry solid component in the fifth step is 94: 6-99: 1.
And in the sixth step, the apparent viscosity of the spandex spinning solution at 40 ℃ is 3500-5500 poise.
Has the advantages that: compared with the prior art, the spandex fiber prepared by the invention has more excellent elastic modulus and resilience performance compared with the conventional spandex fiber with the same denier, and the problems of unstable storage and poor spinnability of the spinning solution prepared by the prior art are solved.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following embodiments of the present invention are clearly and completely described, but the embodiments should not be construed as limiting the present invention in any way.
The first embodiment is as follows:
(1) 319.5Kg of polytetrahydrofuran ether glycol (molecular weight 1820) and 71.85Kg of 4, 4' -toluene diisocyanate were reacted at 85 ℃ for 120min to give an isocyanate group-terminated polyurethane prepolymer A having an NCO content of 2.4% by mass.
(2) 150.593Kg of polyoxypropylene triol (molecular weight 1000) and 205.539Kg of 4, 4' -tolylene diisocyanate were reacted at 85 ℃ for 120min to give an isocyanate group-terminated polyurethane prepolymer B in which the mass fraction of NCO was 2.2%.
(3) And uniformly mixing the prepolymer A and the prepolymer B to obtain a prepolymer C, wherein the mass ratio of the prepolymer A to the prepolymer B is 95: 5.
(4) Dissolving prepolymer C with N, N-dimethylacetamide, adding an N, N-dimethylacetamide solution containing 1.479Kg of ethylenediamine, 0.203Kg of propylenediamine and 0.333Kg of diethylamine to perform chain extension reaction and chain termination reaction; then adding N, N-dimethylacetamide solution of chlorine resisting agent, anti-yellowing agent, antioxidant, dyeing auxiliary agent, antistatic agent, delustering agent and lubricating and unwinding agent; after the stock solution is cured, the apparent viscosity at 40 ℃ is 4500poise, and the 3-hole 40D polyurethane elastic fiber is obtained through dry spinning.
Example two:
the preparation method is the same as that of the first example, except that the mass ratio of the prepolymer A to the prepolymer B in the prepolymer C in the step (3) is 90: 10.
Example three:
the preparation method is the same as that of the first example, except that the mass ratio of the prepolymer A to the prepolymer B in the prepolymer C in the step (3) is 80: 20.
Example four:
(1) 319.53Kg of polytetrahydrofuran ether glycol (with a molecular weight of 1820) and 76.93Kg of 4, 4' -toluene diisocyanate were reacted at 85 ℃ for 120min to give an isocyanate group-terminated polyurethane prepolymer A with an NCO content of 2.8% by mass.
(2) 319.53Kg of polyoxypropylene triol (molecular weight 3000) and 70.091Kg of 4, 4' -toluene diisocyanate were reacted at 85 ℃ for 120min to give an isocyanate group-terminated polyurethane prepolymer B in which the mass fraction of NCO was 2.6%.
(3) And uniformly mixing the prepolymer A and the prepolymer B to obtain a prepolymer C, wherein the mass ratio of the prepolymer A to the prepolymer B is 95: 5.
(4) Dissolving prepolymer C with N, N-dimethylacetamide, adding N, N-dimethylacetamide solution containing 1.72Kg of ethylenediamine, 0.236Kg of propylenediamine and 0.381Kg of diethylamine to carry out chain extension reaction and chain termination reaction; then adding N, N-dimethylacetamide solution of chlorine resisting agent, anti-yellowing agent, antioxidant, dyeing auxiliary agent, antistatic agent, delustering agent and lubricating and unwinding agent; after the stock solution is cured, the apparent viscosity at 40 ℃ is 5000poise, and the 3-hole 40D polyurethane elastic fiber is obtained through dry spinning.
Comparative example one:
the preparation process is the same as in example one except that prepolymer C in step (3) is composed entirely of prepolymer A.
Comparative example two:
the preparation process is the same as in example one except that prepolymer C in step (3) is composed entirely of prepolymer B.
The elastic properties were evaluated in examples one to four and comparative example one in the following manner:
(1) 300% elongation stress (SS300)
And testing the sample by using an electronic tensile testing machine, wherein the tensile speed is 500mm/min, the length of the sample is 50mm, and the stress of the sample is tested when the sample is extended by 300%.
(2) Elastic recovery rate
Elastic recovery rate ═ L 1 -L 2 )/(L 1 -L 0 ) Wherein L is 0 Is the original length of the sample, L 1 The length of the sample when stretched to 300% elongation, L 2 The length of the sample after relaxation by stretching.
The results obtained for examples one to four and comparative examples one and two are shown in table 1 below:
TABLE 1
TABLE 1 comparison of Spandex Properties
| Prepolymer A | Prepolymer B | Prepolymer a: prepolymer B | SS300/g | Elastic recovery rate/%) | Spinnability | |
| Example 1 | 2.4％ | 2.2％ | 95:5 | 14.0 | 93.6 | Good effect |
| Example 2 | 2.4％ | 2.2％ | 90:10 | 14.7 | 94.5 | Good effect |
| Example 3 | 2.4％ | 2.2％ | 80:20 | 15.6 | 96.7 | Good effect |
| Example 4 | 2.8％ | 2.6％ | 95:5 | 15.0 | 95.1 | Good effect |
| Comparative example 1 | 2.4％ | -- | 100 | 11.8 | 91.2 | Good effect |
| Comparative example 2 | -- | 2.2％ | 0:100 | -- | -- | Can not spin |
Claims (4)
1. A preparation method of high-elasticity polyurethane elastic fiber is characterized in that the preparation method of the polyurethane elastic fiber comprises the following steps:
step one, reacting diphenylmethane diisocyanate (MDI) and polyether polyol according to the mass ratio of 1: 9.5-1: 13 to prepare a polyurethane prepolymer A;
step two, reacting diphenylmethane diisocyanate (MDI) and polyether polyol according to the mass ratio of 1: 11.9-1: 14.3 to prepare a polyurethane prepolymer B;
step three, mixing the polyurethane prepolymer A and the polyurethane prepolymer B to prepare a prepolymer C;
step four, dissolving the prepolymer C by using an organic solvent, and adding a chain extender and a chain terminator to form a polyurethane urea solution;
adding the slurry into the prepared polyurethane urea solution, and curing to form a polyurethane spinning solution;
step six, preparing the prepared spandex spinning solution into high-elasticity polyurethane elastic fibers by adopting a dry spinning technology;
wherein,
the polyether glycol in the first step is polytetrahydrofuran ether glycol with the functionality of 2 and the number average molecular weight of 1000-2000;
the polyurethane prepolymer A in the first step has NCO with the mass fraction of 2.4% -3.2%;
the polyether polyol in the second step is polyoxypropylene triol with the functionality of 3 and the number average molecular weight of 700-3000;
the polyurethane prepolymer B in the second step has NCO with the mass fraction of 2.2% -2.6%;
the mass ratio of the prepolymer A to the prepolymer B in the prepolymer C in the third step is 95: 5-80: 20.
2. The method for preparing a high-elasticity polyurethane elastic fiber according to claim 1, wherein the method comprises the following steps: the chain extender in the fourth step is one or more of ethylenediamine, propylenediamine and pentylenediamine; the chain terminator is one or more of diethylamine and n-hexylamine.
3. The method for preparing a high-elasticity polyurethane elastic fiber according to claim 1, wherein the method comprises the following steps: the sizing agent in the fifth step contains chlorine-resistant agent, anti-yellowing agent, antioxidant, dyeing auxiliary agent, antistatic agent, delustering agent and lubricating and unwinding agent.
4. The method for preparing a high-elasticity polyurethane elastic fiber according to claim 1, wherein the method comprises the following steps: and in the sixth step, the apparent viscosity of the spandex spinning solution at 40 ℃ is 3500-5500 poise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703280.8A CN111733478B (en) | 2020-07-21 | 2020-07-21 | Preparation method of high-elasticity polyurethane elastic fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703280.8A CN111733478B (en) | 2020-07-21 | 2020-07-21 | Preparation method of high-elasticity polyurethane elastic fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111733478A CN111733478A (en) | 2020-10-02 |
| CN111733478B true CN111733478B (en) | 2022-09-16 |
Family
ID=72655996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010703280.8A Active CN111733478B (en) | 2020-07-21 | 2020-07-21 | Preparation method of high-elasticity polyurethane elastic fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111733478B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089122B (en) * | 2021-04-01 | 2023-03-10 | 华峰重庆氨纶有限公司 | Preparation method of polyurethane urea spinning solution with stable and controllable viscosity and fiber |
| CN113684553B (en) * | 2021-09-16 | 2023-07-11 | 东莞市博斯蒂新材料有限公司 | TPU monofilament |
| CN119060292B (en) * | 2024-08-29 | 2025-08-05 | 中原工学院 | Spandex fiber, preparation method thereof, and textile prepared therefrom |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3964648B2 (en) * | 2001-10-30 | 2007-08-22 | オート化学工業株式会社 | One-part moisture-curing polyurethane adhesive and flooring adhesive method using the same |
| KR100615780B1 (en) * | 2004-12-30 | 2006-08-25 | 주식회사 효성 | High stress retention spandex fiber |
| CN104404648B (en) * | 2014-12-17 | 2016-08-24 | 浙江华峰氨纶股份有限公司 | A kind of preparation method of rare earth aluminate blue long afterflow polyurethane elastomeric fiber |
| CN104774307B (en) * | 2015-04-08 | 2017-11-10 | 武汉纺织大学 | Preparation method of modified polyurethane flexible macromolecule emulsion of the chain alkyl containing side and products thereof |
| CN104790057B (en) * | 2015-04-10 | 2016-08-24 | 浙江华峰氨纶股份有限公司 | A kind of polyols blend prepares the method for polyurethane elastomeric fiber |
| CN105970343A (en) * | 2016-06-17 | 2016-09-28 | 浙江华峰氨纶股份有限公司 | Preparation method of low-modulus elastic polyurethane fibers with high recovery ratio |
| CN108929425A (en) * | 2018-07-19 | 2018-12-04 | 芜湖维软新材料有限公司 | A kind of silicone oil preparation method applied to textile |
-
2020
- 2020-07-21 CN CN202010703280.8A patent/CN111733478B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| Effect of crosslinking density on resilient performance of low‐resilience flexible polyurethane foams;Lei, YZ et al.;《POLYMER ENGINEERING AND SCIENCE》;20151231;第55卷(第2期);第308-315页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111733478A (en) | 2020-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106757485B (en) | A kind of preparation method of high drawing spandex fibre | |
| CN111733478B (en) | Preparation method of high-elasticity polyurethane elastic fiber | |
| CN103710786B (en) | A kind of preparation method of the polyurethane stock solution for high speed spinning | |
| CN112127006A (en) | Easy-to-dye spandex fiber and preparation method thereof | |
| CN103436983A (en) | High-resilience urethane elastic fiber as well as preparation method thereof | |
| CN112442755B (en) | Preparation method of high-resilience Gao Junyi high-temperature-resistant spandex fiber | |
| CN114286876B (en) | Reactive dye-dyeable polyurethane urea elastic yarn and its manufacturing method | |
| KR100514456B1 (en) | Polyurethaneurea Elastic Fiber Having Stable Viscosity and Good Heat-resistant Properties and Its Preparation Method | |
| CN111534883A (en) | High-elastic polyurethane urea fiber, preparation method thereof and fabric | |
| CN102719928A (en) | Preparation method for high-stress high-resilience polyurethane fiber | |
| CN109322008B (en) | Method for improving performance stability of spandex product | |
| CN111501127B (en) | A kind of carbon dioxide-based polyurethane fiber and preparation method thereof | |
| CN107641847B (en) | Preparation method of polyurethane elastic fiber with excellent adhesive force and dyeing property | |
| CN110923844B (en) | Preparation method of spandex easy to unwind | |
| CN109537092A (en) | A kind of preparation method of multifunctional polyurethane elastomer | |
| CN107002299A (en) | Polyurethane-urea elastic yarn with low-temperature processability | |
| CN111394821A (en) | A kind of high-strength, high-resilience spandex fiber and preparation method thereof | |
| CN118685886B (en) | High-speed spinning spandex fiber and preparation method thereof | |
| CN102666948A (en) | Method for producing elastic yarn having excellent elasticity and elongation | |
| CN118184950A (en) | Spandex with high heat setting efficiency at low temperature and preparation method thereof | |
| CN108048947B (en) | Polyimide blending modified spandex and preparation method thereof | |
| CN109183188B (en) | High-modulus copolymerized modified spandex and preparation method thereof | |
| KR100807041B1 (en) | Elastic yarn excellent in setability and manufacturing method thereof | |
| CN118007271A (en) | Method for preparing high-temperature-resistant high-strength spandex | |
| KR101010151B1 (en) | Elastic yarn with improved viscosity stability and color fastness and manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |