Silane natural-crosslinked polyethylene cable insulating material and its production process

A natural cross-linking and cable insulation technology, applied in the direction of insulated cables, insulated conductors, cables, etc., can solve the problems of poor effect and difficult to achieve in cable factories, and achieve the effect of reducing production costs, less equipment investment, and convenient organization of production.

Inactive Publication Date: 2009-07-15
SHANGHAI ELECTRIC CABLE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts are organotin catalysts. The catalytic effect of this kind of catalysts is obvious only in hot water bath or hot steam, and the effect is poor under natural conditions. Therefore, the produced cables must be placed in a hot water bath to be cross-linked.
[0004] At present, although the silane naturally cross-linked polyethylene insulation materials that enter the domestic market, such as borealis and Dow Chemical, do not use organotin catalysts, the base material (material A) is mostly produced by copolymerization, that is, silane and ethylene Reactor copolymerization to form polymers containing silane branch chains, this method is essentially a resin production technology, which must be completed by large petrochemical companies, and it is difficult for domestic cable material factories to realize

Method used

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  • Silane natural-crosslinked polyethylene cable insulating material and its production process
  • Silane natural-crosslinked polyethylene cable insulating material and its production process
  • Silane natural-crosslinked polyethylene cable insulating material and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A material production:

[0058] The components of material A and the weight ratio of each component are: high-density polyethylene resin 100Kg; vinyl trimethoxysilane 0.5Kg; DCP 0.02Kg;

[0059]Put high-density polyethylene resin, vinyltrimethoxysilane and DCP into the storage compartment of the automatic weighing scale respectively, set the feeding ratio according to the above ratio, and feed all raw materials into the twin-screw extruder in proportion , the length-to-diameter ratio of the extruder is 40:1, the diameter is 75cm, and the temperature is set to 120°C in zone 1, 150°C in zone 2, 180°C in zone 3, 200°C in zone 4, 210°C in zone 5, 210°C in zone 6, Zone 7 at 215°C, Zone 8 at 220°C, Zone 9 at 225°C, flange at 225°C, head at 225°C, extrude, strand granulate, dry the finished product at 70°C for 2 hours, and finally pack the dried product Get material A.

[0060] B material production: B material component name and the weight ratio of each component are: high-...

Embodiment 2

[0064] The components of material A and the weight ratio of each component are: high-density polyethylene resin 100Kg; vinyl triethoxysilane 3.5Kg; DCP 0.2Kg;

[0065] The name of the components of material B and the weight ratio of each component are: high-density polyethylene resin 100Kg; antioxidant 1010 20.0Kg; tert-butyl peroxide 3,5,5-trimethylhexyl ester 5Kg.

[0066] The ratio of material A and material B is 85:15 by weight, and the production process is the same as that of Example 1.

Embodiment 3

[0068] The components of material A and the weight ratio of each component are: high-density polyethylene resin 100Kg; vinyltrimethoxysilane 1.0Kg; BPO 0.04Kg;

[0069] The names of the components of material B and the weight ratio of each component are: low-density polyethylene resin 100Kg; antioxidant 1686.0Kg; tert-butyl peroxyacetate 0.8Kg.

[0070] The ratio of material A and material B is 88:12 by weight, and the production process is the same as that of Example 1.

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Abstract

The invention discloses a silane natural cross-linked polyethylene cable insulation material, which is composed of A material and B material in a weight ratio of 85-95:5-15; the component name of A material and the weight ratio of each component are: polyethylene 100 parts by weight of resin; 0.5-3.5 parts by weight of silane; 0.02-0.2 parts by weight of initiator; the name and weight ratio of the components of material B are: 100 parts by weight of polyethylene resin; 5-20 parts by weight of antioxidant; 0.5-5 parts by weight of the catalyst. The invention also discloses a production method for preparing silane natural cross-linked polyethylene cable insulation material. The silane natural cross-linked polyethylene insulation material is produced by the above-mentioned process. After extrusion, it does not need to be soaked in a hot water bath, and can be produced under natural conditions. crosslinking. This can reduce the production process for the cable manufacturing enterprise, reduce the production cost, improve the production efficiency, it is very convenient to organize production, and the equipment investment is small.

Description

technical field [0001] The invention relates to a silane natural crosslinked polyethylene cable insulating material and a production method thereof. Background technique [0002] Silane cross-linked polyethylene cable material is widely used in my country's wire and cable industry as an insulating material for low-voltage power cables. Compared with peroxide cross-linking and radiation cross-linking, this material has the advantages of simple production equipment, convenient operation and low overall cost when manufacturing cross-linked wires and cables, and has become the leading insulation material for low-voltage cross-linked cables. [0003] Traditional silane XLPE cable insulation materials are also called warm water cross-linked cable materials, that is, cables produced with these materials need to be placed in a warm water bath or steam at 90°C for several to dozens of hours to complete cross-linking. Its mechanism is to use organic peroxide as an initiator, silane g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K5/54H01B7/17
Inventor 段春来汪晓明项健
Owner SHANGHAI ELECTRIC CABLE RES INST
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