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Drawing extraction method in preparation process of ultrahigh molecular weight polytene

A technology of polyethylene fiber and ultra-high molecular weight, which is applied in the field of improvement in the drawing and extraction process to achieve the effects of promoting surface renewal, improving fiber strength, and increasing fiber plasticity

Active Publication Date: 2007-02-14
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

[0035] After mixing polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through a hopper. The powder feed rate was 0.4 kg / min. Solvent paraffin oil enters the feed port after being metered by the metering pump from the storage tank. The feed rate of solvent paraffin oil was 6 kg / min. The two materials are fully mixed and evenly dissolved before entering the screw extruder. Then it enters the spinning box and is extruded into filaments through the spinneret. After cooling in a coagulation tank, gel fibers were formed, which were extracted with dichloromethane. The speed entering the extraction tank was 17.4 m / min and the speed exiting the extraction tank was 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 speeds that need to be set, which are 17.4 m / min, 20.8 m / min, and 25 m in sequence. / ...

Embodiment 2

[0038] After mixing polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through a hopper. The powder feed rate was 0.6 kg / min. Solvent paraffin oil enters the feed port after being metered by the metering pump from the storage tank. The feed rate of solvent paraffin oil was 5 kg / min. The two materials are fully mixed and evenly dissolved before entering the screw extruder. Then it enters the spinning box and is extruded into filaments through the spinneret. After cooling in a coagulation tank, gel fibers were formed, which were extracted with xylene. The speed entering the extraction tank was 18 m / min and the speed exiting the extraction tank was 35 m / min. The drafting extraction process in this embodiment is a three-stage drafting extraction. Three-stage drafting is set up in each stage of the extraction tank. There are nine godet speeds to be set, which are 18 m / min, 19 m / min, 20.5m / min, 22m / min, 24m / min, 26m / min...

Embodiment 3

[0041] After mixing polyethylene powder with a relative molecular weight of 5 million and additives, it is fed into the feed port through a hopper. The powder feed rate was 0.5 kg / min. Solvent paraffin oil enters the feed port after being metered by the metering pump from the storage tank. The feed rate of solvent paraffin oil was 5 kg / min. The two materials are fully mixed and evenly dissolved before entering the screw extruder. Then it enters the spinning box and is extruded into filaments through the spinneret. After cooling in a coagulation tank, gel fibers were formed, which were extracted with dichloromethane. The speed entering the extraction tank was 15 m / min and the speed exiting the extraction tank was 25 m / min. The drafting extraction process in this embodiment is a single-stage extraction. Three-stage drafting is set up in the extraction tank. There are three godet speeds that need to be set, which are 15 m / min, 17.5 m / min, and 25 m / min. . Finally, after dryi...

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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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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