Method of improving surface cohesion performance of relative molecular weight polyethylene

A technology of molecular weight polyethylene and ultra-high molecular weight, which is applied in stretch spinning, filament forming treatment, textiles and papermaking, etc. It can solve the problems of fiber strength decline, fiber mechanical performance decline, and the difficulty of mastering the best process conditions. , to achieve the effect of maintaining strength and improving the bonding performance of the fiber surface

Inactive Publication Date: 2005-11-09
DONGHUA UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN1035308A discloses a method for improving the surface bonding performance of UHMWPE fibers. It is to carry out plasma treatment on the surface of UHMWPE fibers. This method can effectively improve the wettability and surface bonding strength of fibers to the resin matrix, but this method is difficult to achieve Continuous production, industrialization is more difficult, and improper treatment will significantly reduce the mechanical properties of fibers
However, the process of this method is cumbersome, and the best process conditions are difficult to grasp, and the prospects for ind

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Vinyl acetate (VA) content is 28%, the ethylene-vinyl acetate copolymer (EVA) of melt index 190 is dissolved in xylene, makes composite extraction agent, and the massfraction of EVA in composite extraction agent is 0.1%, The ultra-high relative molecular weight polyethylene (UHMWPE) jelly fiber with a weight-average relative molecular weight of 1 million is extracted in a composite extractant for 10 minutes at 0.4 atmospheric pressure and a temperature of 80° C., and then dried at room temperature. The dry jelly fiber is stretched 20 times at 100°C for the first stage, 2 times for the second stage at 110°C, and 1.2 times for the third stage at 120°C to make the surface bonding performance better. Enhanced UHMWPE fibers.

Embodiment 2

[0027] Vinyl acetate (VA) content is 28%, the ethylene-vinyl acetate copolymer (EVA) of melt index 190 is dissolved in xylene, makes composite extraction agent, and the massfraction of EVA in composite extraction agent is 10%, The ultra-high relative molecular weight polyethylene (UHMWPE) jelly fiber with a weight-average relative molecular weight of 5 million is extracted in a composite extractant for 0.1 minute at 5 atmospheres at a temperature of 10° C., and then dried at room temperature. The dry jelly fiber is stretched 20 times at 100°C for the first stage, 2 times for the second stage at 110°C, and 1.2 times for the third stage at 120°C to make the surface bonding performance better. Enhanced UHMWPE fibers.

Embodiment 3

[0029] An ethylene-ethylene glycol copolymer with an ethylene glycol content of 18% is dissolved in xylene to make a composite extractant, and the mass fraction of the ethylene-ethylene glycol copolymer in the composite extractant is 3%. The ultra-high relative molecular weight polyethylene (UHMWPE) jelly fiber with a weight-average relative molecular weight of 3 million is extracted in a composite extractant for 0.1 minute at 5 atmospheres and at a temperature of 0° C., and then dried at room temperature. The dry jelly fiber is stretched 20 times at 100°C for the first stage, 2 times for the second stage at 110°C, and 1.2 times for the third stage at 120°C to make the surface bonding performance better. Enhanced UHMWPE fibers.

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Abstract

The invention discloses a method for improving surface bonding performance of ultrahigh molecular polyethylene filter (UHMWPE), including the steps as follows: (1) dissolving polar polymer in a routine extractant of ultrahigh weight-average relative molecular weight polyethylene jelly glue filter with a relative molecular weight of 1,000,000-5,000,000 to make a composite extractant, where the polar polymer accounts for 0.1wt%-10wt% (weight percent); (2) extracting the said jelly glue fiber at 0.4-5 atmospheres at 0-80 deg.C in the composite extractant for 0.1-20 min, and then by the postprocessing procedures, such as stretching, making an ultrahigh relative molecular weight polyethylene fiber with the surface bonding performance has been improved to a higher extent. The advantages of the invention are that it maximumly holds original fiber strength and the surface bonding performance of UHMWPE has a relatively outstanding improved effect.

Description

technical field [0001] The invention relates to a method for modifying ultra-high relative molecular weight polyethylene (UHMWPE) fibers, in particular to a method for improving the surface bonding performance of ultra-high relative molecular weight polyethylene fibers. Background technique [0002] UHMWPE fiber is the third-generation high-performance fiber after carbon fiber and aramid fiber, and has mechanical properties unmatched by other high-performance fibers. Its specific strength and specific modulus are the highest among all chemical fibers. In addition, it also has excellent chemical resistance, weather resistance, high energy absorption, impact resistance, low temperature resistance, electrical insulation, and x-ray transparency. And certain water resistance and other excellent properties, so it is widely used in military, aerospace and navigation engineering, leisure sporting goods and high-performance, lightweight composite materials and other fields, such as p...

Claims

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Application Information

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IPC IPC(8): D01D1/00
Inventor 于俊荣胡祖明刘兆峰潘婉莲诸静
Owner DONGHUA UNIV
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