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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 difficult implementation and poor effect in cable material factories, and achieve the effects of less equipment investment, lower production costs, and convenient organization of production

Inactive Publication Date: 2007-07-11
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

[0059] A material production:

[0060] The weight ratio of A component and each component is: high density polyethylene resin 100Kg; vinyl trimethoxysilane 0.5Kg; DCP 0.02 Kg;

[0061]Load the high-density polyethylene resin, vinyl trimethoxysilane and DCP into the storage compartment of the automatic weighing scale, set the feeding ratio according to the above ratio, and feed all the raw materials into the twin-screw extruder in proportion The extruder has a length-to-diameter ratio of 40:1, a diameter of 75cm, and a temperature setting of 120°C in zone 1, 150°C in zone 2, 180°C in zone 3, 200°C in zone 4, 210°C in zone 6, 210°C in zone 6, 7 zone 215℃, 8 zone 220℃, 9 zone 225℃, flange 225℃, machine head 225℃, extrude, stretch and pelletize, dry the finished product at 70℃ for 2 hours, and finally pack the dried finished product. Get A material.

[0062] Production of material B: the component name and weight ratio of material B are: high-density polyethylene resin 100Kg; antioxid...

Embodiment 2

[0066] The weight ratio of A component and each component is: high-density polyethylene resin 100Kg; vinyl triethoxysilane 3.5Kg; DCP 0.2Kg;

[0067] The component name of B material 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.

[0068] The ratio of material A and material B is 85:15 by weight, and the production process is the same as in Example 1.

Embodiment 3

[0070] The weight ratio of A component and each component is: high-density polyethylene resin 100Kg; vinyl trimethoxysilane 1.0Kg; BPO 0.04Kg;

[0071] The component name of B material and the weight ratio of each component are: low density polyethylene resin 100Kg; antioxidant 1686.0Kg; t-butyl peroxyacetate 0.8Kg.

[0072] The ratio of material A and material B is 88:12 by weight, and the production process is the same as in Example 1.

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Abstract

The invention discloses a natural crosslinking polyethylene cable insulating material of silane, which consists of material A and material B with weight rate at 85-955- 15, wherein the material A is composed of 100g polyethylene resin, 0.5-3. 5g silane and 0.02-0.2g initiator; the material B is composed of 100g polyethylene resin, 5-20g anti-oxidant and 0.5-5g catalyst. The invention also provides the manufacturing method of natural crosslinking polyethylene cable insulating material of silane, which adopts natural crosslinking polyethylene cable insulating material of silane without immersing in the heat bath after squeezing to crosslink under natural condition.

Description

Technical field [0001] The invention relates to a silane natural cross-linked polyethylene cable insulating material and a production method thereof. Background technique [0002] Silane cross-linked polyethylene cable material as an insulating material for low-voltage power cables has been widely used in my country's wire and cable industry. 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. It has become the leading insulation material for low-voltage cross-linked cables. [0003] The traditional silane cross-linked polyethylene cable insulation material is also called warm water cross-linked cable material, that is, the cables produced with these materials need to be placed in a warm water bath or steam at 90°C for several to tens of hours to complete the cross-linking. The mechanism is to use organic peroxi...

Claims

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Application Information

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Patent Type & Authority Applications(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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