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Drying process for high-strength and high-modulus ultrahigh molecular weight polyethylene fibre

A technology of ultra-high molecular weight and polyethylene fiber, which is applied in the direction of single-component polyolefin artificial filament, artificial filament cleaning/drying, etc., can solve the problems of poor production continuity, high waste, intermittent operation, etc., and achieve improved traction elongation speed, reducing solvent content, and improving drying efficiency

Inactive Publication Date: 2009-09-09
SURREY HI TECH INC
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Manufacturing ultra-high molecular weight polyethylene fibers is a complex technical work. The molecular weight of polyethylene used to manufacture ultra-high molecular weight polyethylene fibers can be as high as 2 million to 5 million or even higher. The macromolecular chains are in a highly entangled state, making processing difficult. It is very large, and it is more difficult to produce high-quality fiber filaments. There is no ready-made mature technology available in China
[0004] At present, high-strength and high-modulus ultra-high molecular weight polyethylene fibers are all short-segment fibers, and the lengths vary, so the production length cannot be guaranteed. The application of short-length fibers is limited to the manufacture of bulletproof products, etc. When manufacturing rope products and fabrics, there will be continuous production. Problems of poor performance and high waste
At the same time, the existing ultra-high molecular weight polyethylene fiber production process has problems such as long lines, intermittent operations in some processes, complex and difficult to control processes, high broken wire rate, low production efficiency, high energy consumption, and difficult to control product quality. The production and application of ultra-high molecular weight polyethylene fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A drying process for high-strength and high-modulus ultra-high molecular weight polyethylene fibers. The drying process uses box-type drying equipment and a drying system with forced circulation of hot air (hot air temperature is 40°C) to reduce heat loss and make the temperature in the box uniform. Under the rapid flow of hot air, the extractant on the surface of the fiber is more volatile, which enhances the drying effect and effectively reduces the residual content of the extractant in the fiber. This also lays a good foundation for rapid super-drafting.

Embodiment 2

[0014] A drying process for high-strength and high-modulus ultra-high molecular weight polyethylene fibers. The drying process adopts vertical drying equipment and a drying system with hot air forced circulation (hot air temperature is 60°C) to reduce heat loss and make the temperature in the box uniform. Under the rapid flow of hot air, the extractant on the surface of the fiber is more volatile, which enhances the drying effect and effectively reduces the residual content of the extractant in the fiber. This also lays a good foundation for rapid super-drafting.

Embodiment 3

[0016] A drying process for high-strength and high-modulus ultra-high molecular weight polyethylene fibers. The drying process adopts vertical drying equipment and a drying system with forced circulation of hot air (hot air temperature is 80°C) to reduce heat loss and make the temperature in the box uniform. Under the rapid flow of hot air, the extractant on the surface of the fiber is more volatile, which enhances the drying effect and effectively reduces the residual content of the extractant in the fiber. This also lays a good foundation for rapid super-drafting.

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Abstract

The invention relates to a drying process for a high-strength and high-modulus ultrahigh molecular weight polyethylene fibre. The drying process adopts a drying system by hot-blast forced circulation; and adopted drying equipment comprises a tank type or a corridor form. Compared with the prior art, the drying process improves a drying process of the production of a ultrahigh molecular weight polyethylene fibre, adopts the hot-blast forced circulation, greatly improves the drying efficiency, reduces the solventcontent of fibre yarn in the drawing process, establishes a good foundation for improving the drawing speed in the drawing procedure and the product quality, and can obtain the high-strength (more than 35 g / d) ultrahigh molecular weight polyethylene fibre.

Description

technical field [0001] The invention relates to ultra-high molecular weight polyethylene fibers, in particular to a drying process for high-strength and high-modulus ultra-high molecular weight polyethylene fibers. Background technique [0002] With the progress of mankind and the rapid development of science and technology in recent years, the demand for special fibers from all walks of life is increasing day by day. After carbon fiber and aramid fiber, ultra-high molecular weight polyethylene fiber (UHMWPE) has attracted much attention due to its excellent performance and broad application prospects, and has made great progress in recent years. Ultra-high molecular weight polyethylene fiber has high strength, high modulus and excellent impact resistance, wear resistance and weather resistance, so it is widely used in military engineering, aerospace engineering, infrastructure engineering, agricultural machinery, ship cables, entertainment, etc. fields, and its scope of ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D10/06D01F6/04
Inventor 辛志荣董建东辛春荣
Owner SURREY HI TECH INC
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