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Spandex fiber and its preparation method, fabric

A technology of spandex fiber and fiber-forming polymer, which is applied in the fields of fiber chemical characteristics, textile and papermaking, single-component synthetic polymer rayon, etc., can solve the problems of high investment, difficulty in forming spinning dope, and affecting comfort

Active Publication Date: 2018-12-21
ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent WO2001 / 025308 uses asymmetric diisocyanate and asymmetric chain extender to weaken the aggregation between molecular chains and lower the melting point of fibers. However, the viscosity of spinning dope increases slowly during the aging process, and the aggregation state is unstable, making it difficult to form a stable fiber. The spinning dope has poor spinnability; the patent WO2010 / 045155 uses the composite spinning technology to form a two-phase structure of the fiber, which concentrates on the function of the low melting point component and has little impact on the main body performance, but the equipment is complicated and the investment is high. Difficult to adjust product performance; patents WO2008 / 004549 and JP200171881 use blending modification technology to mix low melting point components with conventional components, but the mixing is difficult, and the effect is not obvious after reaching the molecular level dispersion, so the added amount is relatively high , which has a great influence on microphase separation; patent WO2000 / 063293 uses the principle of chemical crosslinking, adopts the technology of blending modification, which is easy to cause the fabric to become stiff and affects comfort; patent WO2004 / 053218 adopts blending modification, and passed It is produced by melt spinning, its performance is not as good as that of dry spinning, and it is limited by slicing technology, so its application field is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation method of the polyether type polyurethane segment in the present invention can adopt known polyurethane reaction technology. For example, the urethane prepolymer A having an isocyanate group at the end can be synthesized by reacting polyether diol and diisocyanate under the condition of excess diisocyanate. Preferably, a prepolymer A with an isocyanate group at the end can be synthesized by reacting an excess equivalent of diisocyanate with polytetramethylene ether glycol with a number average molecular weight of 500-5000; for example, 4,4'-diphenylmethane The molar ratio of diisocyanate to polytetramethylene ether glycol may be 1.5:1 to 2.0:1.

[0030] In traditional spandex preparation, the urethane prepolymer is generally further subjected to a chain extension reaction with a bifunctional amine to directly obtain a polyurethane urea polymer. Even if the spandex is further modified, it is carried out on the polyurethane urea polymer, for example, mixi...

Embodiment 1

[0058] Step 1: Preparation of Prepolymer C

[0059] 1) Mix polytetramethylene ether glycol with a number average molecular weight of 2000 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to obtain a polyurethane prepolymer A with isocyanate groups at the end, The molar ratio of 4,4'-diphenylmethane diisocyanate to polytetramethylene ether glycol is 1.70:1.

[0060] 2) After mixing polyethylene oxide glycol with a number average molecular weight of 1200 and 1,2-propanediol-3-sodium sulfonate evenly, mix it with 2,4'-diphenylmethane diisocyanate and 4, A mixture of 4'-diphenylmethane diisocyanate is mixed, wherein the mass ratio of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate is 1:9, and the ratio of isocyanate group to hydroxyl group The molar ratio is 2.00:1. The above mixture was reacted at 90° C. for 120 minutes to obtain a polyurethane oligomer B having an isocyanate group at the end.

[0061] 3) Mix prepolymer A and oli...

Embodiment 2

[0072] Step 1: Preparation of Prepolymer C

[0073] 1) Mix raw materials polytetramethylene ether glycol with a number average molecular weight of 1800 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to obtain a polyurethane prepolymer A with an isocyanate group at the end, The molar ratio of 4,4'-diphenylmethane diisocyanate to polytetramethylene ether glycol is 1.70:1.

[0074] 2) After mixing polyethylene oxide glycol with a number average molecular weight of 1200 and 1,2-propanediol-3-sodium sulfonate evenly, mix it with 2,4'-diphenylmethane diisocyanate and 4, A mixture of 4'-diphenylmethane diisocyanate is mixed, wherein the mass ratio of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate is 1:9, and the ratio of isocyanate group to hydroxyl group The molar ratio is 2.00:1. The above mixture was reacted at 90° C. for 120 minutes to obtain a polyurethane oligomer B having an isocyanate group at the end.

[0075] 3) Mix prep...

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PUM

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Abstract

The invention relates to a spandex fiber. A fiber-forming polymer of the spandex fiber is formed by copolymerization of a polyether type polyurethane chain segment and a hydrophilic polyurethane chain segment, wherein the mass of the hydrophilic polyurethane chain segment is 30.00-50.00% relative to the total mass of the polyether type polyurethane chain segment and the hydrophilic polyurethane chain segment. When the spandex fiber provided by the invention is shaped under steam, a bonding effect can be achieved when the temperature is 110-130 DEG C. The invention also relates to a preparation method of the spandex fiber and a fabric using the spandex fiber.

Description

technical field [0001] The invention relates to the field of functional spandex fibers, in particular to a spandex fiber that can be shaped and easily bonded under steam, a preparation method thereof, and a fabric using the spandex fiber. Background technique [0002] Spandex is a kind of polyurethane elastic fiber, known as "fabric monosodium glutamate", and there is a saying in the industry that "no ammonia can't make cloth". It can be seen that spandex is one of the key factors to improve the quality of fabrics. With the continuous progress of society, people put forward new requirements for the aesthetics and comfort of textiles, such as anti-snagging, spinning curling, lightness, softness, etc. The use of spandex makes the fabric a composite material, which is a key factor in improving the quality of the fabric. The new properties of spandex will endow the fabric with new functions. [0003] The setting of fabrics is mainly done by steam, and heat is the main factor fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94C08G18/10C08G18/12C08G18/38C08G18/40C08G18/48C08G18/60C08G18/66C08G18/32
CPCC08G18/10C08G18/12C08G18/3855C08G18/4054C08G18/4808C08G18/4833C08G18/4854C08G18/606C08G18/6685C08G18/6688D01F6/94C08G18/3228C08G18/3271
Inventor 崔跃伟乔建强荆建林张永旗
Owner ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH