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A kind of cutting-resistant ultra-high molecular weight polyethylene fiber and its preparation method and application

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin rayon, fiber chemical characteristics, rayon manufacturing, etc., can solve the problem of low elongation at break of the finished fiber, affecting the mechanical properties of the finished fiber, and affecting Problems such as the elongational viscosity of the spinning dope, to achieve high elongation at break, high strength, and improved mechanical properties

Active Publication Date: 2019-04-30
BEIJING TONGYIZHONG NEW MATERIAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cutting resistance of the ultra-high molecular weight polyethylene fiber obtained by this method is effectively improved, the performance of the finished fiber is not only affected by the length and length distribution of the hard fiber, but also by the content of the hard fiber.
During the preparation of finished fibers, hard fibers are insoluble in UHMWPE solution. Although increasing the content of hard fibers can ensure that the finished fibers meet the strength requirements, a higher content of hard fibers will affect the preparation of finished fibers The elongational viscosity of the spinning dope during the process further affects the mechanical properties of the finished fiber, specifically manifested in the low elongation at break and high number of broken ends of the finished fiber

Method used

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preparation example Construction

[0034] The present invention also provides a method for preparing the cut-resistant ultra-high molecular weight polyethylene fiber described in the above technical solution, comprising the following steps:

[0035] a) mixing hard fiber and mineral spirits to obtain mixed solution A;

[0036] b) mixing the mixed solution A with an ultra-high molecular weight polyethylene solution to obtain a spinning stock solution;

[0037] c) performing spinning, pre-drawing, extraction, drying and normal drawing of the spinning dope in sequence to obtain cut-resistant ultra-high molecular weight polyethylene fibers.

[0038] In the present invention, the hard fiber and mineral spirits are mixed to obtain a mixed liquid A. In the present invention, the hard fibers preferably include one or more of ceramic fibers, carbon fibers and silicon carbide whiskers, more preferably a mixture of ceramic fibers, carbon fibers and silicon carbide whiskers. In the present invention, the hard fiber is the...

Embodiment 1

[0065] (1) Add 55.6g of ceramic fibers, 422.2g of carbon fibers and 22.2g of silicon carbide whiskers into 1.5kg of 68# white oil, stir at 2500rpm until uniform, and obtain a mixed solution A.

[0066] (2) The weight average molecular weight of 10kg is 4.2×10 6 1. Add ultra-high molecular weight polyethylene powder with a molecular weight distribution of 5.0 into 150kg 68# white oil, stir at 80rpm and 105°C for 1.5h to obtain an ultra-high molecular weight polyethylene solution; Add the mixed solution A obtained in step (1) into the mixture, and stir at 85 rpm and 130° C. for 2.5 hours to obtain a spinning stock solution.

[0067] (3) The spinning stock solution is filtered through a 60-mesh filter with a pore size, and after spinning through a spinning box, the product is cooled in a water bath at 25° C. to obtain jelly yarn; then the jelly yarn is drawn with 4 times The stretching ratio is pre-drawn at 25°C, then extracted with white oil extractant, dried at 30°C, and final...

Embodiment 2

[0069] (1) Add 55.6g of ceramic fibers, 416.6g of carbon fibers and 27.8g of silicon carbide whiskers into 1.5kg of 68# white oil, and stir until uniform at 2000rpm to obtain a mixed solution A.

[0070] (2) The weight average molecular weight of 10kg is 3.5×10 6 1. The ultra-high molecular weight polyethylene powder with a molecular weight distribution of 5.0 is added to 150kg 68# white oil, stirred at 60rpm and 100°C for 2h to obtain an ultra-high molecular weight polyethylene solution; then in the ultra-high molecular weight polyethylene solution Add the mixed solution A obtained in step (1), and stir at 80 rpm and 120° C. for 3 hours to obtain a spinning stock solution.

[0071] (3) The spinning stock solution is filtered through a filter with a pore size of 70 meshes, and then the product is cooled in a water bath at 22° C. to obtain jelly silk; The stretching ratio is pre-drawn at 25°C, then extracted with white oil extractant, dried at 40°C, and finally stretched at 14...

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Abstract

The invention provides a cutting resistant ultrahigh molecular weight polyethylene fiber, a preparation method and application thereof. The cutting resistant ultrahigh molecular weight polyethylene fiber includes: ultrahigh molecular weight polyethylene fiber; and hard fiber dispersed in the ultrahigh molecular weight polyethylene fiber. Specifically, the ultrahigh molecular weight polyethylene fiber and the hard fiber are in a mass ratio of 100:(2-8). Compared with the prior art, according to the cutting resistant ultrahigh molecular weight polyethylene fiber provided by the invention, on the basis of meeting the cutting resistant performance EN388 five-grade standard, through control of the content of the hard fiber, the extension viscosity of a spinning solution in the preparation process is improved, thus further improving the mechanical properties of the finished fiber product, the obtained finished fiber product has high strength, and also has small end breakage number. Experimental results show that the cutting resistant ultrahigh molecular weight polyethylene fiber provided by the invention has strength up to 26.9cN / dtex, elongation at break up to 5%, and an end breakage number of less than or equal to 1 per million meters.

Description

technical field [0001] The invention relates to the technical field of ultra-high molecular weight polyethylene fibers, in particular to a cut-resistant ultra-high molecular weight polyethylene fiber and its preparation method and application. Background technique [0002] Ultra-high molecular weight polyethylene fiber, also known as high-strength and high-modulus polyethylene fiber, refers to the fiber spun from polyethylene with a relative molecular weight of more than 1 million. Due to the advantages of light weight, impact resistance and high dielectric properties, ultra-high molecular weight polyethylene fibers are widely used in aerospace, sea defense, weaponry and daily industry. [0003] In the daily industrial field, ultra-high molecular weight polyethylene fibers are most often used to prepare products with cut-resistant functions, such as cut-resistant gloves, cut-resistant tents, cut-resistant ropes, etc. However, the cutting resistance of ultra-high molecular w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/10
Inventor 贺鹏黄兴良郭长明杨媛媛
Owner BEIJING TONGYIZHONG NEW MATERIAL TECH CORP
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