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Technique for manufacturing natural crosslinking polyethylene-insulated cable material

A technology of natural cross-linking and manufacturing process, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., can solve the problems of large equipment occupancy rate, slow cross-linking speed, and long time required to shorten the production cycle and exchange The effect of short connection time

Inactive Publication Date: 2008-03-26
ZHEJIANG WANMA MACROMOLECULE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the silane-grafted polyethylene produced by the two-step method needs to be soaked in warm water or steam to complete the hydrolysis and cross-linking. Water enters the product through diffusion. The diffusion speed of water is relatively slow, which makes the cross-linking speed slow. It takes a long time, the occupancy rate of the equipment is large, and the thickness of the product also has a direct impact on the crosslinking speed

Method used

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  • Technique for manufacturing natural crosslinking polyethylene-insulated cable material
  • Technique for manufacturing natural crosslinking polyethylene-insulated cable material
  • Technique for manufacturing natural crosslinking polyethylene-insulated cable material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] 1), making A material:

[0103] (name and parts by weight of raw materials included):

[0104] LDPE, 90; linear low density polyethylene LLDPE, 10; vinyltriethoxysilane (silane coupling agent) 1.5; dicumyl peroxide (DCP) initiator, 0..5; sodium bicarbonate ( anti-precrosslinking agent), 0.03.

[0105] After the above raw materials are blended, reaction grafting occurs through a twin-screw extruder, melted and granulated, and A material is obtained.

[0106] 2), making B material:

[0107] (name and parts by weight of raw materials included):

[0108] LDPE, 10; linear low density polyethylene LLDPE, 90; benzenesulfonic acid (catalyst), 0.5; amine bicarbonate (anti-precrosslinking agent), 0.5; 3114 (antioxidant) 10; oleic acid amide (processing aid agent) 1.

[0109] The above raw materials are mixed, melted and granulated by a twin-screw extruder to obtain material B.

[0110] 3), mixing and melting

[0111] When the cable factory is producing, mix A material and ...

Embodiment 2

[0113] 1), making A material:

[0114] (name and parts by weight of raw materials included):

[0115] Ultra-low density polyethylene, 100; vinyldiethoxysilane (silane coupling agent) 1.5; TBPB (initiator), 0.1; aniline (anti-precrosslinking agent), 0.01; EVA (water diffusing agent), 1 .

[0116] After the above raw materials are blended, reaction grafting occurs through a twin-screw extruder, melted and granulated, and A material is obtained.

[0117] 2), making B material:

[0118] (name and parts by weight of raw materials included):

[0119] High-density polyethylene, 100; sulfuric acid (catalyst), 5; bicarbodiimide (anti-crosslinking agent), 5; DLTP (antioxidant) 1, polypropylene wax (processing aid) 5.

[0120] The above raw materials are mixed, melted and granulated by a twin-screw extruder to obtain material B.

[0121] 3), mixing and melting

[0122] When the cable factory is producing, mix A material and B material, the mixing weight ratio of A material and B ma...

Embodiment 3

[0124] 1), making A material:

[0125] (name and parts by weight of raw materials included):

[0126] Medium density polyethylene, 100; vinyl dimethoxysilane (silane coupling agent) 1.5; BPO (initiator), 0.2; isopropylamine (anti-precrosslinking agent), 0.05; EVA-g-MA (water diffusion agent) 10.

[0127] After the above raw materials are blended, reaction grafting occurs through a twin-screw extruder, melted and granulated, and A material is obtained.

[0128] 2), making B material:

[0129] (name and parts by weight of raw materials included):

[0130] Low-density polyethylene, 100; Alkylbenzenesulfonic acid (catalyst), 3; L-pyroglutamic acid (anti-precrosslinking agent), 3; Bisphenol A (antioxidant) 5, PPA (processing aid) 10.

[0131] The above raw materials are blended, melted by a twin-screw extruder, blended and granulated to obtain material B.

[0132] 3), mixing and melting

[0133] When the cable factory is producing, mix A material and B material, the mixing w...

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PUM

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Abstract

The present invention relates to technological process of making cable insulating polyethylene material with cross-linking completed at natural condition, fast reaction speed, simple production process and easy operation. The making process includes the following steps: 1. melting, mixing and pelletizing two groups of material in a double screw extruder separately to obtain material A comprising polyethylene 100 weight portions, initiator 0.05-0.2 weight portions, silane coupler 0.5-5.0 weight portions and pre-cross linking resisting agent 0.1-0.5 weight portions; and material B comprising polyethylene 100 weight portions, catalyst 0.5-5 weight portions, antioxidant 1-10 weight portions, machining assistant 1-10 weight portions and pre-cross linking resisting agent 0.5-5 weight portions; and 2. mixing the material A and the material B in the weight ratio of 18-20 to 1, and melting and extruding in a double screw extruder to form the cable insulating layer.

Description

technical field [0001] The invention relates to a polymer material manufacturing process, in particular to a polyethylene cable insulating material manufacturing process. Background technique [0002] Due to the structural characteristics of polyethylene itself, it is determined that it cannot be used at higher temperatures and its strength is lower, so it cannot have a wider application field; in order to improve the lack of high temperature resistance and mechanical properties of polyethylene, the best way It is to modify it; there are many methods of modification, among which cross-linking modification is one of the most widely used and most successful modification methods. The heat resistance, impact resistance, creep resistance and chemical resistance of polyethylene after cross-linking modification are superior to those of unmodified polyethylene. There are three main methods for cross-linking and modifying polyethylene in industry: radiation cross-linking, peroxide c...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K5/54C08J3/24C08J3/12B29C47/40H01B3/44B29C48/40
CPCB29C48/40
Inventor 陈文卿郭伟杰
Owner ZHEJIANG WANMA MACROMOLECULE MATERIAL
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