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Drawing extraction method in preparation process of ultrahigh molecular weight polytene

A polyethylene fiber, ultra-high molecular weight technology, which is used in the improvement field of drafting and extraction sections to achieve the effect of promoting surface renewal, promoting micropore closure, and lubricating fiber plasticity

Active Publication Date: 2010-08-25
安徽威亚新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrochlorofluorocarbons are one of the extraction agents with the best extraction effect, and are low-toxic, non-flammable, and have a better operating environment and are relatively safe. However, due to the restrictions of the international convention for the protection of the ozone layer, their use will be phased out.

Method used

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  • Drawing extraction method in preparation process of ultrahigh molecular weight polytene
  • Drawing extraction method in preparation process of ultrahigh molecular weight polytene
  • Drawing extraction method in preparation process of ultrahigh molecular weight polytene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] After mixing the polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through the hopper. The powder feed rate was 0.4 kg / min. Solvent paraffin oil enters the feed port from the storage tank after being metered by the metering pump. The feed rate of paraffin oil was 6 kg / min. The two materials enter the screw extruder after being fully mixed and uniformly dissolved. Then it enters the spinning box, passes through the spinneret, and is extruded into filaments. After cooling in a coagulation water tank, gel fibers are formed and extracted with dichloromethane. The speed of entering the extraction tank is 17.4 m / min, and the speed of exiting the extraction tank is 25 m / min. The drafting extraction process in this embodiment is a single-stage drafting extraction. Three-stage drafting is set up in the extraction tank. There are three godet roller speeds that need to be set, which are 17.4 m / min, 20.8 m / min, and 25 ...

Embodiment 2

[0040] After mixing the polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through the hopper. The powder feed rate was 0.6 kg / min. Solvent paraffin oil enters the feed port from the storage tank after being metered by the metering pump. The feed rate of paraffin oil was 5 kg / min. The two materials enter the screw extruder after being fully mixed and uniformly dissolved. Then it enters the spinning box, passes through the spinneret, and is extruded into filaments. After cooling in a coagulation water tank, gel fibers are formed and extracted with xylene. The speed of entering the extraction tank is 18 m / min, and the speed of exiting the extraction tank is 35 m / min. The drafting extraction process of this embodiment is three-stage drafting extraction, and three-stage drafting is set up in each stage of extraction tank, and there are nine godet roller speeds that need to be set, which are 18 m / min, 19 m / min, 20.5 m / ...

Embodiment 3

[0043] After mixing the polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through the hopper. The powder feed rate was 0.5 kg / min. Solvent paraffin oil enters the feed port from the storage tank after being metered by the metering pump. The feed rate of paraffin oil was 5 kg / min. The two materials enter the screw extruder after being fully mixed and uniformly dissolved. Then it enters the spinning box, passes through the spinneret, and is extruded into filaments. After cooling in a coagulation water tank, gel fibers are formed and extracted with dichloromethane. The speed of entering the extraction tank is 15 m / min, and the speed of exiting the extraction tank is 25 m / min. The drafting and extraction process in this embodiment is a single-stage extraction. Three-stage drafting is set up in the extraction tank. There are three godet roller speeds that need to be set, which are 15 m / min, 17.5 m / min, and 25 m / min. ....

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Abstract

The invention relates to a drafting extracting method used in ultrahigh molecular weight polyethylene fiber preparation course. It processes drafting while extracting to renew fiber surface, remove possible cortical layer to increase extracting speed. Meanwhile the solvent of the as formed fiber will be easily outflow strand silk because of the drafting. In addition, it can make the cavity of as formed fiber close after stand silk outflow to make its structure more compact. The liquid extract can keep drafted fiber surface temperature even and mass transfer process stable. In order to gain proper drafting scaling factor, it is need to distribute proper drafting scaling factor among each extracting groove.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to an improved method for drawing and extracting sections in the production process of ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber, also known as high-strength and high-modulus polyethylene fiber, high-degree orientation polyethylene fiber, high-performance polyethylene fiber. Ultra-high molecular weight polyethylene fiber has high strength, high modulus, and high degree of orientation, and is widely used in the manufacture of bulletproof protective products, ropes, cables, fishing nets, and sports equipment. Ultra-high molecular weight polyethylene fiber is the commercialized high-performance fiber with the highest specific strength. [0003] In 1979, Smith and Lemstra of DSM Company in the Netherlands invented the process of producing ultra-high molecular weight poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/06D01F6/04
Inventor 时寅尹晔东
Owner 安徽威亚新材料技术有限公司