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Ultra-high molecular weight polyethylene composite tube

A polyethylene composite pipe, ultra-high molecular weight technology, applied in the field of polymer materials, can solve the problems of high viscosity and difficulty in extrusion processing of pipes, achieve low temperature resistance, increase Vicat softening temperature and mechanical strength, and high extrusion The effect of speed

Active Publication Date: 2014-09-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problem of high viscosity in the molten state of ultra-high molecular weight polyethylene in the prior art, which is difficult to extrude and process pipes, and provides an ultra-high molecular weight polyethylene composite pipe that is easy to process and has good comprehensive performance

Method used

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  • Ultra-high molecular weight polyethylene composite tube

Examples

Experimental program
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Effect test

Embodiment 1

[0042]Take 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 3.8 million, dry it at 120°C for 10 hours before use, and then cool it to room temperature naturally. Take another 0.5 part of mullite, 0.5 part of corundum, and 1 part of polyethylene wax with a molecular weight of 5000. , 0.5 parts of calcium stearate, 0.1 parts of fumed silica, 0.3 parts of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 0.1 parts of pentaerythritol ester and 0.1 parts of triphosphite (2,4-Di-tert-butylphenyl) ester is placed in a high-speed stirrer, stirred at room temperature for 5 minutes at high speed, and the material in the high-speed stirrer is heated to 40°C under low-speed stirring, and then passed through the observation hole of the high-speed stirrer Spray the cross-linking agent evenly under the conditions of low-speed stirring and constant temperature of 40°C, wherein the cross-linking agent is a mixed solution of 1 part ...

Embodiment 2

[0044] Take 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 6 million, dry it at 120°C for 10 hours before use, and then cool it to room temperature naturally. Take another 15 parts of mullite, 15 parts of corundum, and 10 parts of high-density polyethylene with a molecular weight of 100,000. Polyethylene, 3 parts of zinc stearate, 0.5 parts of fumed silica, 1.5 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1 part of pentaerythritol ester and 1 part of Tris(2,4-di-tert-butylphenyl) phosphate is placed in a high-speed stirrer, stirred at room temperature for 8 minutes at high speed, and the material in the high-speed stirrer is heated to 90°C under low-speed stirring, and then passed through the high-speed stirrer. The observation hole is uniformly sprayed with a cross-linking agent under low-speed stirring and a constant temperature of 90°C. The cross-linking agent is a mixture of 5 parts of silane, 0.3...

Embodiment 3

[0046] Take 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 5 million, dry it at 120°C for 10 hours before use, and then cool it to room temperature naturally. Take another 10 parts of mullite, 5 parts of corundum, and 5 parts of high-density polyethylene with a molecular weight of 300,000. Polyethylene, 2 parts of zinc stearate, 0.5 parts of fumed silica, 1 part of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 0.5 parts of pentaerythritol ester and 0.5 parts of Tris(2,4-di-tert-butylphenyl) phosphate is placed in a high-speed stirrer, stirred at room temperature for 6 minutes at high speed, and the material in the high-speed stirrer is heated to 70°C under low-speed stirring, and then passed through the high-speed stirrer. The observation hole is evenly sprayed with a cross-linking agent under low-speed stirring and a constant temperature of 70°C. The cross-linking agent is a mixture of 3 parts of silane, 0.15 ...

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Abstract

The invention relates to a crosslinking-modified ultra-high molecular weight polyethylene composite tube with higher extrusion speed, belonging to the field of high polymer materials. The material comprises the following components in parts by mass: 100 parts of ultra-high molecular weight polyethylene, 1-30 parts of filling reinforcer, 1-10 parts of flow accelerator, 0.5-3 parts of lubricant, 0.1-2 parts of nucleating agent and 0.1-2 parts of composite antioxidant. The method for preparing the composite tube comprises the following steps: proportionally weighing the components, putting in a high-speed stirrer, stirring at high speed at room temperature for 5-8 minutes, and heating the material in the stirrer while stirring at low speed; uniformly spraying 16-40 parts of crosslinking agent by a sight hole of the high-speed stirrer under the conditions of low-speed stirring and constant temperature of 40-90 DEG C, stirring at high speed at the constant temperature of 40-90 DEG C for 5-8 minutes, stopping stirring, and cooling the crosslinked material to room temperature; and carrying out extrusion forming on the crosslinked material by a single-screw pump of which the outlet is connected with a head port mold, carrying out in-mold cooling, and finally, cutting to obtain the ultra-high molecular weight polyethylene composite tube.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a modified ultra-high molecular polyethylene composite pipe with reduced viscosity in a molten state. Background technique [0002] Ultra-high molecular weight polyethylene generally refers to high-density polyethylene with a viscosity-average molecular weight greater than 1 million and a linear structure. It is a thermoplastic engineering plastic with excellent comprehensive properties. Due to its extremely high molecular weight, linear molecular structure and special molecular characteristics, UHMWPE has comprehensive characteristics that other engineering plastics do not have, such as friction and wear resistance, impact resistance, corrosion resistance, low temperature resistance, and Excellent properties such as pressure resistance, stress cracking resistance, swelling resistance, scaling resistance, self-lubrication and non-adhesion. Therefore, ultra-high molecular weight ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08K3/34C08K3/36C08K5/134C08K5/098C08K5/526C08K5/5425B29C47/92B29C48/92
CPCB29B7/7461B29C47/385B29C47/0066B29C2947/92219B29C2947/92704B29C2947/92895B29B7/72B29C47/10B29C2947/9218B29C2947/92866B29C47/0023B29B7/90B29B7/40B29C47/92B29B7/726B29C48/0022B29C48/09B29C48/285B29C48/397B29C48/92B29C2948/9218B29C2948/92219B29C2948/92704B29C2948/92866B29C2948/92895C08L23/06C08K2201/003C08K2201/014C08L2201/08C08L2203/18C08L2205/025C08L2207/062C08L2207/068C08L2312/08C08K13/02C08K3/34C08K3/36C08K5/1345C08K5/098C08K5/526C08K5/5425
Inventor 纪艳娟石国军杨海滨袁月石建设李翠
Owner CHINA PETROLEUM & CHEM CORP
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