Polyester elastomer/PET composite elastic fiber and preparation method thereof

A technology of composite elastic fibers and polyester elastomers, applied in fiber processing, conjugated synthetic polymer rayon, melt spinning, etc., can solve the problems of insufficient elasticity, short production process efficiency, insufficient elasticity of composite elastic fibers, etc. , to achieve the effect of excellent elasticity, saving raw materials and high breaking strength

Active Publication Date: 2015-08-12
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another example is that CN103882538 discloses a novel elastic fiber and a preparation method thereof. The raw materials used in the method are PTT, PET, ECDP (atmospheric pressure cationic dyeable polyester) and PET with different viscosities. ) process, which not only needs to stretch the spun fiber and then treat it with boiling water at 95-100°C for 15-20 minutes to prepare the finished composite elastic fiber, but also the crimp of the fiber is only 43-55%, and the elasticity is seriously insufficient
[0007] In addition, in addition to insufficient elasticity, the composite elastic fibers prepared by the above methods also have shortcomings caused by their respective raw materials in terms of fiber feel and comfort. Therefore, the development and production process is short, high in efficiency, low in cost and more excellent. Properties of composite elastic fibers are of great importance

Method used

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  • Polyester elastomer/PET composite elastic fiber and preparation method thereof
  • Polyester elastomer/PET composite elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029](1) First add 80kg of terephthalic acid, 39kg of 1,4-butanediol, 80kg of double-ended hydroxypolyoxypropylene ether with a molecular weight of 1080 and 40kg of double-ended hydroxypolytetramethylene ether with a molecular weight of 500 into the reactor Stir evenly, then add 0.1kg potassium titanium oxalate, depressurize at 220°C to -10Kpa for 1.5 hours for direct esterification, then raise the temperature to 265°C, gradually depressurize to 60pa for 3 hours, melt and polycondense for 3 hours, and pelletize by casting belt to obtain characteristic viscosity Polyester elastomer chips with a density of 0.9dl / g, wherein the molar ratio of 1,4-butanediol: double-terminated hydroxyl polyether: terephthalic acid is 0.9:0.32:1;

[0030] (2) The resulting polyester elastomer chips and PET chips are in a mass ratio of 50:50 or less figure 1 The process steps shown are for the preparation:

[0031] Pre-crystallize PET chips 1 and polyester elastomer chips 5 in pre-crystallization ...

Embodiment 2

[0034] (1) 80kg terephthalic acid, 40kg 1,4-butanediol, 50kg molecular weight polyoxyethylene glycol of 1280 and 80kg molecular weight of 600 double-ended hydroxyl polytetramethylene ether are added to the reactor and stirred evenly, Then add 0.1kg potassium titanium oxalate, depressurize at 200°C to -20Kpa for 5 hours for direct esterification, then raise the temperature to 265°C, gradually depressurize to 40Pa for 2 hours for melt polycondensation, and the intrinsic viscosity is 1.50 by casting belt cutting dl / g of polyester elastomer chips, where the molar ratio of 1,4-butanediol: double-terminated hydroxyl polyether: terephthalic acid is 0.922:0.358:1;

[0035] (2) The resulting polyester elastomer chips and PET chips are in a mass ratio of 40:60 figure 1 The process steps shown are prepared, because the present embodiment is different except that the following process conditions are different, all the other are the same as embodiment 1:

[0036] PET chips were pre-crysta...

Embodiment 3

[0039] (1) 100kg terephthalic acid, 60kg 1,4-butanediol, 10kg molecular weight are 250 double-ended hydroxyl polyoxypropylene ethers and 80kg molecular weight are 400 polyoxyethylene glycols added to the reactor and stirred evenly, then Add 0.1kg of butyl titanate, depressurize at 215°C to -20Kpa for 2 hours for direct esterification, then raise the temperature to 260°C, gradually depressurize to 60Pa for 4 hours to melt and polycondense, the intrinsic viscosity is 1.18 after casting belt cutting dl / g of polyester elastomer chips, in which the molar ratio of 1,4-butanediol: double-terminated hydroxyl polyether: terephthalic acid is 1.006:0.399:1;

[0040] (2) The resulting polyester elastomer chips and PET chips are in a mass ratio of 30:70 figure 1 The process steps shown are prepared, because the present embodiment is different except that the following process conditions are different, all the other are the same as embodiment 1:

[0041] PET chips were pre-crystallized at ...

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Abstract

The invention discloses a polyester elastomer / PET composite elastic fiber and a preparation method thereof. The preparation method comprises the steps of firstly carrying out reduced-pressure direct esterification on terephthalic acid, 1,4-butanediol and double-ended hydroxyl polyether in a certain proportion in the presence of catalysts, carrying out melt polycondensation to obtain a polyester elastomer, and carrying out a spin-draw-winding one-step process on the prepared polyester elastomer and PET, so as to obtain the polyester elastomer / PET composite elastic fiber, wherein the breaking strength of the polyester elastomer / PET composite elastic fiber is 2.8cN / dtex-3.56cN / dtex, the elongation at break is 16.9%-30.4%, the curling degree is 60%-75%, the curling elasticity rate is 97%-99%, the capillary water absorption height is 9.7cm / 30min-14.1cm / 30min. Compared with normal composite elastic fibers, the polyester elastomer / PET composite elastic fiber has relatively excellent elasticity and relatively soft hand feeling, and the fabric capillary suction effect of the polyester elastomer / PET composite elastic fiber is even higher than those of cotton fabrics; the preparation method is short in production process, high in spinning speed and low in cost, and the prepared composite elastic fiber can be directly used in subsequent weaving without being processed into interlaced yarns.

Description

technical field [0001] The invention belongs to the technical field of polyester composite fiber for textile and its preparation, and in particular relates to a polyester elastomer / PET composite elastic fiber and a preparation method thereof. Background technique [0002] At present, spandex, as the crown of elastic fibers, has been widely used in hosiery, swimwear, inner pajamas, sportswear, fashion outerwear and health care products. However, the production equipment and process of spandex elastic fiber are complicated, the cost of raw materials and processing is high, the price is expensive, and there are "three wastes" pollution. There will be problems such as "whitening" and "bubbling", excessive elasticity, and poor comfort. [0003] In order to solve the series of problems of spandex fiber, in recent years, composite elastic fibers represented by two-component polytrimethylene terephthalate (PTT) and T400 have appeared on the market. Both fibers are obtained by comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14C08G63/66D01D1/00D01D5/08D01D5/28
Inventor 兰建武沈定康沈鑫
Owner SICHUAN UNIV
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