Cross-linked polyethylene insulating material universal for large and small wires of 3KV and below, and preparation method thereof

A cross-linked polyethylene, 3KV technology, used in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of different insulation thickness, unstable cable extrusion, and different cable diameters

Pending Publication Date: 2021-02-19
SUZHOU HENGLI COMM MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different diameters and different insulation thicknesses of small and large wires, the extrusion of cables with a wire specification of 1.5-16 square meters in the transition between large and small wires is unstable.

Method used

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  • Cross-linked polyethylene insulating material universal for large and small wires of 3KV and below, and preparation method thereof
  • Cross-linked polyethylene insulating material universal for large and small wires of 3KV and below, and preparation method thereof
  • Cross-linked polyethylene insulating material universal for large and small wires of 3KV and below, and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0045] The present invention also provides a preparation method of cross-linked polyethylene insulating material of 3KV and below for large and small wires, comprising the following steps:

[0046] 1), 60-90 parts of PE resin, 4-10 parts of PP resin and 0.1-0.6 parts of rheological masterbatch are mixed into the double-stage screw;

[0047] 2) After the pellets obtained in step 1) enter the front stage of the double-stage screw, add a mixture of 0.6-1.8 parts of silane coupling agent and 0.03-0.15 parts of cross-linking agent, and then extrude through a single-screw after extruding with a double-stage screw Granulation;

[0048] 3), transported by water and cooled;

[0049] 4), drying and packing to make graft A material;

[0050] 5) In addition to step 1)-step 4), 0.01-0.2 parts of catalyst and 65-90 parts of PE resin must be extruded and granulated by double-stage screw, and then dried and packaged to obtain material B;

[0051] 6) When extruding at the client side, mater...

Embodiment 1

[0056]A cross-linked polyethylene insulating material of 3KV and below for large and small wires, including the following components in parts by weight:

[0057]

[0058]

[0059] A method for preparing a cross-linked polyethylene insulating material of 3KV and below for large and small wires, comprising the following steps:

[0060] 1), 90 parts of PE resin, 6 parts of PP resin and 0.2 part of rheological masterbatch are mixed into the double-stage screw;

[0061] 2), the pellets obtained in step 1) enter the front section of the double-stage screw, add a mixed solution of 1.8 parts of silane coupling agent and 0.08 part of crosslinking agent, and then extrude through a double-stage screw and then granulate through single-screw extrusion; silane The coupling agent includes 0.6 parts of vinyltrimethoxysilane and 1.2 parts of vinyltrimethoxytriethoxysilane;

[0062] 3), transported by water and cooled;

[0063] 4), drying and packing to make graft A material;

[0064] ...

Embodiment 2

[0068] A cross-linked polyethylene insulating material of 3KV and below for large and small wires, including the following components in parts by weight:

[0069]

[0070] This formula has good heat extension and heat shrinkage performance and good extrusion performance for insulated wires with an open wire specification of 1.5-16 square millimeters.

[0071] The preparation method of Example 2 is similar to that of Example 1, except that the proportion of vinyltrimethoxysilane and vinyltrimethoxytriethoxysilane in the silane coupling agent in Example 2, the amount of crosslinking agent and Example 1 is slightly different.

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Abstract

The invention discloses a cross-linked polyethylene insulating material universal for large and small lines of 3KV and below, and a preparation method thereof. The cross-linked polyethylene insulatingmaterial comprises PE resin, PP resin, a silane coupling agent, a rheological master batch, a cross-linking agent and a catalyst, wherein extruding by a double-step screw, extruding granulation by asingle screw, conveying with water, drying and packaging are performed to obtain a finished product. According to the cross-linked polyethylene insulating material universal for large and small linesof 3KV and below, and the preparation method thereof, the PE resin and the PP resin are compounded to improve the problem of unqualified thermal shrinkage of the small wire, the reaction rate is reduced and the extrusion processability of the small-wire-diameter cable is optimized through the vinyltrimethoxyethoxysilane, the dibutyltin dilaurate catalyst can catalyze a hydrolytic condensation reaction of the grafted material A and water to generate a three-dimensional reticular structure, and the obtained silane cross-linked polyethylene insulating material has more excellent processability, is universal for large and small lines, is stable in extrusion and good in surface extrusion, and meets JB/T 10437-2004 standard requirements and customer processing technology requirements.

Description

technical field [0001] The invention belongs to the technical field of preparation of polyethylene insulating materials, and in particular relates to a cross-linked polyethylene insulating material of 3KV and below for large and small wires and a preparation method thereof. Background technique [0002] Ordinary silane cross-linked polyethylene insulation material is based on linear low-density resin, adding coupling agent, catalyst (increasing cross-linking rate), lubricant (improving product processing performance, making the material easier to demould and flow), etc., through Appropriate proportions are grafted by screw extrusion and packaged separately with small packets of catalysts, and mixed together when used. [0003] At present, the proportion of silane cross-linked polyethylene insulating materials in the field of low-voltage cable insulation is still in a dominant position. In the production practice of silane cross-linked polyethylene insulation materials, diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08K5/14C08F255/02C08F230/08H01B3/44
CPCC08L23/0815C08L51/06C08F255/02H01B3/441C08L2203/202C08L2312/08
Inventor 黄晓昕朱毓栋吴雪邱晨博高嘉露
Owner SUZHOU HENGLI COMM MATERIAL
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