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Ultra-high-molecular-weight polyethylene fiber and preparation method thereof

A technology of ultra-high molecular weight and polyethylene fibers, which is applied in fiber processing, melt spinning, stretch spinning, etc., can solve the problems of easy deformation, poor rigidity, and low breaking strength, and achieve good rigidity, reduce production costs, The effect of high breaking strength

Active Publication Date: 2019-08-30
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the UHMWPE fibers still have low breaking strength, poor rigidity, and easy deformation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of ultra-high molecular weight polyethylene fibers, comprising:

[0029] The ultra-high molecular weight polyethylene powder with a particle size of about 30 μm is melted at 100 ° C, sprayed out through a circular spinneret hole with a diameter of 5 mm, drawn 3 times, and quenched into a coagulation bath at 1 ° C to form jelly fibers. After extraction with hydrocarbon extractant, drying at 60°C, and thermal stretching at 110°C for 50 times, ultra-high molecular weight polyethylene fibers can be prepared. The obtained ultra-high molecular weight polyethylene fiber was checked and found that its breaking strength was 44cN / dtex and its initial modulus was 2270cN / dtex.

Embodiment 2

[0031] A preparation method of ultra-high molecular weight polyethylene fibers, comprising:

[0032] The ultra-high molecular weight polyethylene powder with a particle size of about 50 μm is melted at 120 ° C, sprayed out through a circular spinneret hole with a diameter of 4.5 mm, drawn 4 times, and quenched into a coagulation bath at 5 ° C to form jelly fibers. After staying in the coagulation bath for 1-2 minutes, go out of the coagulation bath to form a jelly fiber, and then pre-stretch 3 times, then extract it with a hydrocarbon extractant, dry at 50°C, and heat-stretch at 120°C for 45 times. Obtain ultra-high molecular weight polyethylene fibers. The obtained ultra-high molecular weight polyethylene fiber was checked, and it was found that its breaking strength was 43.6 cN / dtex and its initial modulus was 2300 cN / dtex.

Embodiment 3

[0034] A preparation method of ultra-high molecular weight polyethylene fibers, comprising:

[0035] The ultra-high molecular weight polyethylene powder with a particle size of about 100 μm is melted at 140 ° C, sprayed out through a circular spinneret hole with a diameter of 3 mm, drawn 5 times, and quenched into a coagulation bath at 10 ° C to form jelly fibers. After pre-stretching 10 times, the ultra-high molecular weight polyethylene fiber can be obtained by successively extracting with hydrocarbon extractant, drying at 45°C, and stretching 30 times at 180°C. The obtained ultra-high molecular weight polyethylene fiber was checked, and it was found that its breaking strength was 43.2cN / dtex, its initial modulus was 2130cN / dtex, and its diameter was about 60mm.

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PUM

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Abstract

The invention provides a preparation method of ultra-high-molecular-weight polyethylene fiber. The preparation method comprises the steps that ultra-high-molecular-weight polyethylene powder is fused,drafted after passing through a spinneret hole, and then cooled to form gel fiber; the gel fiber is sequentially subjected to extraction, drying and thermal stretching to obtain the ultra-high-molecular-weight polyethylene fiber, wherein the draft ratio is 3-30, and the temperature of thermal stretching is lower than 200 DEG C. According to the preparation method, a traditional spinning process is broken, the production cost is reduced, the performance of the prepared ultra-high-molecular-weight polyethylene fiber is greatly improved, the breaking strength is high, the initial modulus is large, the breakage resistance is excellent, the rigidity is good, and the deformation is not likely to occur.

Description

technical field [0001] The invention relates to the technical field of ultra-high molecular weight polyethylene fibers, in particular to an ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber is spun from polyethylene with a molecular weight of more than 1 million. It has many excellent properties such as high specific strength, high specific modulus and good chemical corrosion resistance. It is widely used in the field of safety protection, Aerospace fields, etc., are indispensable and important strategic materials in national security and economic construction. At present, the UHMWPE fibers still have low breaking strength, poor rigidity, and easy deformation. Therefore, it is extremely important to provide a new method for preparing ultra-high molecular weight polyethylene fibers, improve the performance of ultra-high molecular weight polyethylene fibers, an...

Claims

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Application Information

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IPC IPC(8): D01D5/098D01D5/12D01D10/02D01D1/04D01D4/02D01D5/088D01D10/06
CPCD01D5/098D01D5/12D01D10/02D01D1/04D01D4/02D01D5/088D01D10/06D10B2321/0211
Inventor 朱才镇纪穆为杨敬龙刘会超孙同兵陈鹏徐坚
Owner SHENZHEN UNIV