Irradiation cross-linked polyethylene

A technology of cross-linked polyethylene and polyethylene, which is applied in the field of PE preparation, can solve the problems of insufficient mechanical strength, high temperature and limitation of polyethylene, improve the performance of environmental stress crack resistance and heat aging resistance, and improve heat resistance Deformability and the effect of maintaining electrical properties

Inactive Publication Date: 2010-06-09
SHENZHEN FUSAI ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyethylene is one of the largest plastic resins. Due to its structural characteristics, polyethylene oft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Antioxidant 1010 (tetraerythritol ester): 5%; Crosslinking agent (dicumyl peroxide DCP): 1%; Halogen-free flame retardant (aluminum hydroxide): 5%; Polyethylene PE: 60%; ethylene-vinyl acetate copolymer: 29%.

[0024] Then it is made according to the following process: the ingredients are evenly stirred, leaked into the extruder to extrude (melted through temperature), and cut into granules through water cooling.

Embodiment 2

[0025] Embodiment 2: Antioxidant 1010 (tetraerythritol ester): 0.5%; Crosslinking agent (dicumyl peroxide DCP): 0.1%-1%; Halogen-free flame retardant (aluminum hydroxide): 5%-15% %; Polyethylene PE: 40%-60%; Ethylene-vinyl acetate copolymer: 30%-45%.

[0026] Then it is made according to the following process: the ingredients are evenly stirred, leaked into the extruder to extrude (melted through temperature), and cut into granules through water cooling.

Embodiment 3

[0027] Embodiment 3: Take the product of producing 200kg as an example, the weight of the following components is needed,

[0028] Antioxidant 1010 (tetraerythritol ester): 5.6kg; crosslinking agent (dicumyl peroxide DCP): 0.4kg; halogen-free flame retardant (aluminum hydroxide): 14kg; polyethylene PE: 110kg; ethylene-acetic acid Ethylene copolymer: 70kg

[0029] All the components are evenly stirred, leaked into the extruder and extruded (melted through temperature), cut into granules through water cooling, after inspection, this embodiment can reach the required product quality parameters, and has obtained enhanced chemical resistance and stability. Solvent borne, radiation crosslinked polyethylene with reduced cold flow.

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Abstract

The invention discloses an irradiation cross-linked polyethylene, which is characterized by comprising the following components by weight percent: antioxidant 1010: 0.5%-5%, cross-linking agent: 0.1%-1%, non-halogen flame retardant: 5%-15%, polyethylene (PE): 40%-60%, and ethylene/vinyl acetate copolymer: 20%-45%. The irradiation cross-linked polyethylene witnesses a structural transformation from a linear molecule structure to a body type three-dimensional structure; meanwhile the irradiation cross-linked polyethylene is transformed from thermal plastic to insoluble thermosetting plastic, as a result, heat-resisting deformability is enhanced, mechanical property at high temperature is improved, environmental stress cracking resistance and heat-proof aging are improved, chemical resistance and solvent resistance are enhanced, cold fluidity is reduced and previous electric properties are retained.

Description

【Technical field】 [0001] The invention relates to a preparation method of PE, in particular to a preparation method of radiation crosslinked polyethylene. 【Background technique】 [0002] Polyethylene is one of the largest plastic resins. Due to its structural characteristics, polyethylene often cannot withstand high temperatures, and insufficient mechanical strength limits its application in many fields. In order to improve the performance of polyethylene, many modification methods have been studied, cross-linking polyethylene, forming a network three-dimensional structure through covalent bonds between polyethylene molecules, and rapidly improving the performance of polyethylene resin, such as: heat Deformability, wear resistance, chemical resistance, stress crack resistance and a series of physical and chemical properties. [0003] At present, cross-linked polyethylene pipes are the most widely used plastic pipes in the European and American markets. According to statist...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L31/04C08K13/02C08K5/134C08K5/14C08K3/22
Inventor 王建红
Owner SHENZHEN FUSAI ENERGY TECH
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