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Ultraviolet-light crosslinked polyethylene wire-cable material and preparation method thereof

A technology for cross-linking polyethylene, wire and cable materials, applied in plastic/resin/wax insulators, organic insulators, etc., can solve problems such as decreased cross-linking efficiency, pollution of reflectors and UV lamps, and impact on workshop production environment.

Inactive Publication Date: 2017-05-10
合肥光冉高分子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultraviolet light irradiation is carried out in the molten state of polyethylene, because the ultraviolet light irradiation box has a certain length, and it is easy to cause the polyethylene in the molten state to sag due to gravity and cause the eccentricity of the wire and cable; Additives such as cross-linking agents are in a volatile state, which will generate a lot of smoke and affect the production environment of the workshop. At the same time, it will also pollute the reflector and UV lamp tube of the UV irradiation box, resulting in a decrease in cross-linking efficiency.

Method used

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  • Ultraviolet-light crosslinked polyethylene wire-cable material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, the ultraviolet light cross-linked polyethylene wire and cable material and the preparation method thereof are carried out according to the following steps:

[0023] 1. Weigh 90 parts by weight parts of linear low density polyethylene (7042), 10 parts of high density polyethylene (5000S), 1.8 parts of 4-chlorobenzophenone, 1.2 parts of TAC, 1.3 parts of crosslinking accelerator N_N '─Methylene bisacrylamide, 0.1 part of transparent agent dibenzylidene sorbitol, 0.2 part of antioxidant 1010 and 0.1 part of TPP;

[0024] 2. Mix the above raw materials in a mixer at 250 rpm for 5 minutes to obtain a mixture;

[0025] 3. Preheat the extruder to 170°C, put the mixture obtained in step 2 into the mixture, so that the mixture is fully plasticized, extruded and cooled in the water tank, and then enter the ultraviolet radiation cross-linking equipment for irradiation. For 3s, the cross-linked polyethylene wire and cable irradiated by ultraviolet light is obtained. ...

Embodiment 2

[0027] 1. Weigh 100 parts of linear low-density polyethylene (7042), 1.2 parts of BDK, 1.2 parts of TMPTA, 1.0 part of crosslinking accelerator N_N'─methylene bisacrylamide, and 0.1 part of transparent agent HPN-20E in parts by weight , 0.3 part of antioxidant 1010 and 0.1 part of DLTP;

[0028] 2. Mix the above raw materials in a mixer at 250 rpm for 5 minutes to obtain a mixture;

[0029] 3. Preheat the extruder to 165°C, put the mixture obtained in step 2 into the mixture, so that the mixture is fully plasticized, extruded and cooled in the water tank; then enter the ultraviolet radiation crosslinking equipment for irradiation, irradiation For 3s, the cross-linked polyethylene wire and cable irradiated by ultraviolet light is obtained.

[0030] Comparative test (the crosslinking accelerator and transparent agent are not added to the raw materials of this comparative test, and the remaining raw materials are the same as in Example 2)

[0031] 1. Weigh 100 parts of linear low densit...

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Abstract

The invention discloses an ultraviolet-light crosslinked polyethylene wire-cable material and a preparation method thereof. The material is prepared from the following components in parts by weight: 100 parts of polyethylene, 0.1-3.0 parts of a free-radical photoinitiator, 0.1-3.0 parts of a multifunctional crosslinking agent, 0.1-2.0 parts of a crosslinking accelerator, 0.1-2.0 parts of a transparent agent and 0.1-2.0 parts of a complex antioxidant. The method aims at the unsatisfactory crosslinking degree because of low ultraviolet-light crosslinking efficiency of polyethylene after cooling. The formula system of the ultraviolet-light crosslinked polyethylene wire-cable material is screened through abundant experiments, and by adding a moderate amount of crosslinking agent and nucleating transparent agent, the ultraviolet-light crosslinking efficiency and relative properties of polyethylene in a cooling state are improved significantly

Description

Technical field [0001] The invention relates to the field of chemical materials, in particular to an ultraviolet light cross-linked polyethylene wire and cable material and a preparation method thereof. Background technique [0002] Polyethylene has excellent electrical insulation, chemical resistance and good processing properties and is widely used in various fields of national production. But in some special occasions, polyethylene still cannot fully meet people's requirements for material properties, such as heat resistance. Therefore, it is necessary to carry out a series of modifications to the polyethylene material, and the most effective way is to crosslink the polyethylene. After polyethylene is cross-linked, its molecular structure is linearly transformed into a three-dimensional network structure, and its mechanical strength, heat resistance, environmental resistance, and chemical resistance have been improved to varying degrees, expanding the polyethylene The scope ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/14C08F222/38C08F2/48C08K5/1575C08K5/134H01B3/44
CPCC08F2/48C08F255/02C08K5/1345C08K5/1575H01B3/441C08F222/103
Inventor 叶磊吴强华
Owner 合肥光冉高分子材料科技有限公司
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