Silane cross-linking modified ultra-high molecular weight polyethylene fiber preparation method

An ultra-high molecular weight, polyethylene fiber technology, used in fiber processing, textiles and papermaking, etc., can solve the problems of poor continuity and damage to the mechanical properties of UHMWPE fibers, and achieve the effects of low modification cost, convenient operation and simple process.

Active Publication Date: 2014-08-20
JIANGSU SHENTAI SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has poor continuity, and long-term immersion will also damage the mechanical properties of UHMWPE fibers

Method used

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  • Silane cross-linking modified ultra-high molecular weight polyethylene fiber preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using xylene as a solvent, the modified solution was prepared according to the mass concentration of benzoyl peroxide and vinyltrimethoxysilane at 0.08% and 2%, respectively, and the undried UHMWPE fiber was placed in a bath ratio of Ultrasonic treatment was carried out in a 20:1 modified solution for 6 minutes, the ultrasonic treatment temperature was 30°C, and the ultrasonic frequency was 35kHz. After taking out and drying, three-stage thermal stretching was carried out at 100°C, 120°C and 130°C respectively. The total stretching The multiple is 48 times, and the relative humidity of the ambient air is 60% during stretching, and the UHMWPE fiber modified by silane crosslinking is obtained.

Embodiment 2

[0028] Using dichloromethane as a solvent, the mass concentration of 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane and vinyl tri-tert-butylperoxysilane is 0.5% and 5% respectively Configure the modified solution, extract and remove the undried fiber solvent

[0029] The UHMWPE fibers were placed in a modified solution with a bath ratio of 25:1 and subjected to ultrasonic treatment for 5 minutes. The ultrasonic treatment temperature was 30°C and the ultrasonic frequency was 35kHz. Stretching, the total stretching ratio is 45 times, the ambient air relative humidity is 70% during stretching, and the UHMWPE fiber modified by silane crosslinking is obtained.

Embodiment 3

[0031]Using xylene as a solvent, the modified solution was prepared according to the mass concentration of benzoyl peroxide and vinyltriethoxysilane at 0.2% and 6%, respectively, and the undried UHMWPE fiber was placed in the bath ratio after the fiber solvent was removed by extraction. Ultrasonic treatment for 4 minutes in a modified solution of 20:1, the ultrasonic treatment temperature is 40°C, and the ultrasonic frequency is 35kHz. After taking out and drying, three-stage thermal stretching is carried out at 100°C, 120°C and 130°C respectively. The total stretching The multiple is 45 times, and the relative humidity of the ambient air is 65% during stretching, and the UHMWPE fiber modified by silane crosslinking is obtained.

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Abstract

The present invention relates to a silane cross-linking modified ultra-high molecular weight polyethylene fiber preparation method, which comprises: placing ultra-high molecular weight polyethylene UHMWPE gel fibers with no drying treatment into a modified solution, carrying out an ultrasonic treatment, and carrying out multi-stage hot stretching to obtain the finished product. According to the present invention, the fibers have excellent creep resistance and high surface adhesion property, the mechanical property of the modified fibers is basically not reduced, and the method can directly utilize the existing UHMWPE fiber production line to directly prepare the cross-linking modified UHMWPE fibers, has characteristics of simple process and easy operation, and easily achieves industrial continuous treatment.

Description

technical field [0001] The invention belongs to the field of modification methods of ultra-high molecular weight polyethylene fibers, in particular to a preparation method of silane crosslinking modified ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber is the third-generation high-performance fiber after carbon fiber and aramid fiber. It has mechanical properties unmatched by other high-performance fibers. In addition, it also has excellent chemical resistance and weather resistance. High energy absorption, impact resistance, low temperature resistance, wear resistance, bending resistance, cutting resistance, electrical insulation, x-ray penetration and certain water resistance, etc., are widely used in military bulletproof , safety protection, aerospace, marine engineering, leisure sporting goods and high-performance, lightweight composite materials and other fields. However, the UHMWPE m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/10
Inventor 于俊荣彭宏胡祖明
Owner JIANGSU SHENTAI SCI & TECH DEV
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