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Method for preparing ultra-high molecular weight polyethylene fiber and fiber

A technology of ultra-high molecular weight and polyethylene fibers, which is applied in the direction of single-component polyolefin artificial filaments, fiber treatment, and complete sets of equipment for the production of artificial threads. It can solve the problems of affecting fiber quality and production efficiency, unfavorable solvent diffusion and volatilization, Increase the cost of solvent recovery and other issues, to achieve the effect of reducing the hair production rate and end breakage rate, low cost, and enhancing the cohesion ability

Active Publication Date: 2014-09-10
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some air-gap sections play a role of slow cooling to protect the spinneret surface from the blowing, but it is not conducive to the diffusion and volatilization of solvents, thereby increasing the cost of solvent recovery; some air-gap sections play a role in the drafting process, thereby It is easy to cause drafting in the spinneret, resulting in uneven fiber dryness and easy breakage on the spinneret surface, affecting the final quality and production efficiency of the fiber

Method used

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  • Method for preparing ultra-high molecular weight polyethylene fiber and fiber
  • Method for preparing ultra-high molecular weight polyethylene fiber and fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity-average molecular weight 6,000,000) decahydronaphthalene solution is extruded through the spinneret in the spinning box, and through the gas phase section, the spinneret plate surface area is 50.24cm 2 , the cross-sectional area of ​​the gas-phase section is 1.1 times the area of ​​the spinneret plate, the length of the gas-phase section is 0.2 of the cross-sectional width of the sealing cover, that is, 17mm, nitrogen enters through the air inlet, and the temperature in the sealing cover is 99 ° C, nitrogen and flash The steamed decahydronaphthalene is drawn out from the air suction port, and the fine spinning flow enters the box containing pure water at 10°C. The tensile stress is 8kPa. The spun filaments pass through five sets of pressing rollers. The force exerted by each set of pressing rollers on the spun filaments is 0.5MPa. The bonding rate of the filaments is 5%. Winding, and finally pos...

Embodiment 2

[0063] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity-average molecular weight 6,000,000) decahydronaphthalene solution is extruded through the spinneret in the spinning box, and through the gas phase section, the spinneret plate surface area is 50.24cm 2 , the cross-sectional area of ​​the gas-phase section is twice the area of ​​the spinneret plate, the length of the gas-phase section is 0.8 of the cross-sectional width of the sealing cover, that is, 91mm, nitrogen enters through the air inlet, and the temperature in the sealing cover is 150 ° C. The steamed decahydronaphthalene was drawn out from the air suction port, and the other processes were the same as in Example 1. The final fiber performance indicators obtained by post-spinning and drawing are shown in Table 1.

Embodiment 3

[0065] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity average molecular weight 6 million) decahydronaphthalene solution is extruded through the spinneret in the spinning box body, and through the gas phase section, the spinneret plate surface area is 200.96cm 2 , the cross-sectional area of ​​the gas phase section is 4 times the area of ​​the spinneret plate, the length of the gas phase section is 1 time the cross-sectional width of the sealing cover, that is, 320mm, nitrogen enters through the air inlet, the temperature in the sealing cover is 220 ° C, nitrogen and The flash evaporated decahydronaphthalene is drawn out from the air suction port, and the spinning fine stream enters the box containing -10°C decahydronaphthalene. The other processes are the same as in Example 1. The final fiber performance indicators obtained after post-spinning and drafting are shown in Table 1.

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Abstract

The invention discloses a method for preparing an ultra-high molecular weight polyethylene fiber. According to the method, an ultra-high molecular weight polyethylene decahydronaphthalene solution is extruded through a spinneret plate to form a spinning trickle flow; the spinning trickle flow sequentially passes through a gas-phase section, a liquid-phase section, a physical extrusion section, a drying heat tank section and the like to obtain raw filaments; meanwhile, thin spinning filaments exiting from the liquid-phase section have stretching stress, and the raw filaments are subjected to high-power thermal stretching to obtain the ultra-high molecular weight polyethylene fiber of which the single-filament fineness is lower than 0.3dtex. The breaking strength of fiber bundle filaments is not lower than 40cN.dtex<-1>, and the modulus is not lower than 2,000cN.dtex<-1>. The method has the characteristics that the production energy consumption is reduced; the energy is saved, the emission amount is reduced, and the production cost is low. The prepared ultra-high molecular weight polyethylene fiber has excellent quality and is used for preparing public safety protection articles, labor safety products and medical materials such as bulletproof and stab-resistant clothes, explosion-proof blankets, explosion-proof tanks, anti-puncturing shoes, anti-puncturing shoe soles and operation suture lines.

Description

technical field [0001] The invention relates to a preparation method of high-performance fiber, more specifically, to a preparation method of ultra-high molecular weight polyethylene fiber and the fiber. Belongs to the textile field. Background technique [0002] Ultra-high molecular weight polyethylene fiber is currently the fiber material with the highest strength-to-mass ratio. It has high strength and high modulus, light weight (density less than 1), high energy absorption, chemical stability, water resistance, light resistance, fatigue resistance, wear resistance, and bending resistance. , low temperature resistance, easy transmission of radio waves and other excellent characteristics, together with carbon fiber and aramid fiber, are known as the three high-performance fibers. Due to the above special properties, ultra-high molecular weight polyethylene fibers can be used in the preparation of labor insurance products, public safety protection products, and medical mat...

Claims

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Application Information

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IPC IPC(8): D01F6/04D01D10/00D01D10/06D01D5/00D01D13/02
Inventor 李方全孙玉山孔令熙段先泉
Owner CHINESE TEXTILE ACAD
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