Method for preparing hollow northylen of ultra-high relative molecular mass

A relative molecular weight, polyethylene fiber technology, applied in the manufacture of hollow filaments, single-component polyolefin artificial filaments, fiber chemical characteristics, etc., can solve problems such as high strength and high modulus

Inactive Publication Date: 2008-10-22
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as USP4115492, USP5294338, USP6436319 and ZL200510049263 etc. disclose the method for preparing polyethylene hollow fiber, the polyethylene used is high-density polyethylene, what adopt is melt spinning method; And USP5695702 and ZL95193838 disclose thermoplastic hollow fiber membrane module and its Manufacturing method, which mentioned the hollow fiber prepared from ultra-high molecular weight polyethylene, but the fiber is limited to the hollow fiber membrane for filtration, not to mention high-strength and high-modulus

Method used

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  • Method for preparing hollow northylen of ultra-high relative molecular mass
  • Method for preparing hollow northylen of ultra-high relative molecular mass
  • Method for preparing hollow northylen of ultra-high relative molecular mass

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Embodiment 1

[0025] The ultra-high molecular mass polyethylene (UHMWPE) powder with a weight average relative molecular weight of 5,000,000 and mineral oil are prepared in a ratio of 10:90 by weight to form a suspension, and the weight ratio of UHMWPE powder to antioxidant is 1000 Add antioxidant 1010 at a ratio of : 6, and obtain a spinning dope by swelling and dissolving at high temperature.

[0026] A C-type hollow spinneret with an outer diameter of 0.8 mm, a slit gap of 0.2 mm, and a frame width of 0.08 mm was used. The spinning dope is sprayed out through the slit of the C-type hollow spinneret at 240°C, passes through a 10mm air layer, and directly enters a pure water coagulation bath at 5°C to be quenched into hollow jelly fibers. The cross-section and longitudinal micrographs of the resulting hollow jelly fibers are shown in figure 1 As shown, the schematic diagram of the fiber cross-section and the scanning electron microscope photo are shown in figure 2 As shown, the fiber ho...

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Abstract

The invention relates to a method for preparing hollow polythene fibers with superhigh relative molecular mass. The method is to extrude polythene spinning stock solution with superhigh relative molecular mass through a hollow spinning nozzle under the condition of high temperature, to make the polythene spinning stock solution enter into a precipitating bath and quenched into jel fibers, and to prepare the hollow high-strength high-modulus fibers through extraction, drying and super drawing of the prepared jel fibers. The method shortens a path by which solvent in the fibers is diffused out the jel fibers, improves the extraction efficiency, simplifies the extraction technique, eliminates uneven structure and further improves the mechanical properties of the fibers.

Description

technical field [0001] The invention belongs to the field of polyethylene fiber preparation, in particular to a preparation method of hollow ultra-high molecular weight polyethylene fiber. Background technique [0002] Ultra-high molecular weight polyethylene fiber (UHMWPE) is the third-generation high-performance fiber after carbon fiber and aramid fiber, and has mechanical properties unmatched by other high-performance fibers. Among the current synthetic fibers, UHMWPE fiber has low density, high elongation at break, the largest specific strength and specific modulus, surpassing metal materials, and more importantly, it also has good energy absorption characteristics, the most It is suitable for absorbing the impact energy of low-speed fragments, has the best bulletproof performance, and has no secondary damage effect. It is an ideal bulletproof material and has been widely used in security and military fields. And because UHMWPE fiber has many excellent properties such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/08D01D5/24D01D5/06
Inventor 胡祖明于俊荣杨光武陈蕾诸静刘荣鑫刘兆峰潘婉莲
Owner DONGHUA UNIV
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