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Non-crosslinked polyolefin composition for cables

A non-crosslinked, polyolefin technology, used in circuits, electrical components, plastic/resin/wax insulators, etc., can solve problems such as insufficient heat resistance, and achieve good compatibility, no environmental pollution, and excellent processability. Effect

Inactive Publication Date: 2018-11-13
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of environmentally friendly non-crosslinked thermoplastic polyethylene is required; however, its heat resistance is significantly insufficient compared with crosslinked polyethylene resins, so non-crosslinked thermoplastic polyethylene resins have limitations in their use as cable insulators

Method used

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  • Non-crosslinked polyolefin composition for cables
  • Non-crosslinked polyolefin composition for cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the non-crosslinked polyolefin composition for cables of this embodiment, the raw materials include the following components in parts by weight:

[0022] 30 parts of ethylene-vinyl acetate copolymer, 10 parts of polyethylene, 10 parts of maleic anhydride, 5 parts of octene, 1 part of N,N-dimethylformamide, 1 part of dimethyl sulfoxide, triphenyl phosphate 1 part, 1 part of dimethyl acetal, 1 part of N,N-diethylcinnamic amide, 2 parts of ultrafine zinc borate, 1 part of initiator; stir the above mixed material at a stirring speed of 150r / min for 5 minutes , and then melted and plasticized in the twin-screw extruder and carried out grafting reaction, and then extruded from the die head, the barrel temperature of the twin-screw extruder is 120 ° C, the die head temperature is 130 ° C, and the screw speed is 40r / min.

Embodiment 2

[0024] In the non-crosslinked polyolefin composition for cables of this embodiment, the raw materials include the following components in parts by weight:

[0025] 40 parts of ethylene-vinyl acetate copolymer, 20 parts of polyethylene, 20 parts of maleic anhydride, 10 parts of octene, 4 parts of N,N-dimethylformamide, 4 parts of dimethyl sulfoxide, triphenyl phosphate 4 parts, 4 parts of dimethyl acetal, 3 parts of N,N-diethylcinnamic amide, 6 parts of ultrafine zinc borate, 5 parts of initiator; stir the above mixed material at a stirring speed of 200r / min for 10 minutes , and then melted and plasticized in the twin-screw extruder and carried out grafting reaction, and then extruded from the die head, the barrel temperature of the twin-screw extruder is 160 ° C, the die head temperature is 140 ° C, and the screw speed is 70r / min.

Embodiment 3

[0027] In the non-crosslinked polyolefin composition for cables of this embodiment, the raw materials include the following components in parts by weight:

[0028] 30 parts of ethylene-vinyl acetate copolymer, 20 parts of polyethylene, 10 parts of maleic anhydride, 10 parts of octene, 1 part of N,N-dimethylformamide, 4 parts of dimethyl sulfoxide, triphenyl phosphate 1 part, 4 parts of dimethyl acetal, 1 part of N,N-diethylcinnamic amide, 6 parts of ultrafine zinc borate, 1 part of initiator; stir the above mixed material at a stirring speed of 200r / min for 5 minutes , and then melted and plasticized in the twin-screw extruder and carried out grafting reaction, and then extruded from the die head, the barrel temperature of the twin-screw extruder is 160 ° C, the die head temperature is 130 ° C, and the screw speed is 70r / min.

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Abstract

The invention discloses a non-crosslinked polyolefin composition for cables. The non-crosslinked polyolefin composition is prepared from, by weight, 30-40 parts of an ethylene-vinyl acetate copolymer,10-20 parts of polyethylene, 10-20 parts of maleic anhydride, 5-10 parts of octylene, 1-4 parts of N,N-dimethylformamide, 1-4 parts of dimethyl sulfoxide, 1-4 parts of triphenyl phosphate, 1-4 partsof dimethylacetal, 1-3 parts of N,N-diethyl cinnamamide, 2-6 parts of ultrafine zinc borate and 1-5 parts of an initiator. The composition is prepared by steps: stirring the materials for 5-10min at astirring speed of 150-200r / min; performing melt plasticization in a double-screw extruder, carrying out grafting reaction, and performing extrusion molding through a die head, wherein a barrel temperature of the double-screw extruder is 120-160 DEG C, the die head temperature is 130-140 DEG C, and a screw rod rotating speed is 40-70r / min. High mixture compatibility, high softness and excellent heat resistance and physical, mechanical and electrical performances are achieved, a cable manufacturing process can be simplified, process consumption and manufacturing cost are reduced, and excellentprocessability is realized while environmental pollution is avoided.

Description

technical field [0001] The present invention relates to a polyolefin composition, in particular to a non-crosslinked polyolefin composition for cables. Background technique [0002] Cross-linked polyethylene, which is currently mainly used as an insulating material for cables, is a thermosetting resin that has not only excellent heat resistance, chemical resistance, etc. but also excellent electrical characteristics. And recently, cross-linked polyethylene using organic peroxides has been most widely used in the cable industry. However, since the cross-linked polyethylene resin is a thermosetting resin, it is not recyclable due to difficulty in handling, causing environmental pollution. And the cross-linking process is necessary for the process of producing cross-linked polyethylene cables using organic peroxides, wherein in the cross-linking process, high pressure and high temperature are required, so productivity is significantly reduced, and even small changes in process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/06C08F210/14C08K5/523C08K3/38H01B3/30
CPCC08F255/02C08F255/026C08K3/38C08K5/523C08K2003/387H01B3/307C08F222/06
Inventor 李艳琼
Owner CHONGQING UNIV OF ARTS & SCI
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