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Ultraviolet light deeply crosslinked ethylene-propylene-diene mischpolymere rubber cable material and preparation method of insulation or protective sleeve layer thereof

A technology of EPDM rubber and cable insulation, applied in the direction of conductor/cable insulation, cable/conductor manufacturing, insulated conductors, etc., can solve the problems of weak ultraviolet light penetration, reduced cross-linking efficiency, and limited application, etc. To achieve the effect of enhancing the efficiency of UV-induced cross-linking

Active Publication Date: 2011-08-24
HONGLONGJIANG ORIENT SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The most commonly used type of UV crosslinking of polymers is free radical photoinitiators, such as hydrogen abstraction type photoinitiator benzophenone (BP) and cracking type photoinitiator benzoin dimethyl ether (BDK), etc. They generate free radicals after absorbing ultraviolet light and initiate crosslinking reactions, but due to the weak penetrating power of ultraviolet light, it is difficult to penetrate deep into the material to initiate free radical crosslinking reactions, especially in thicker samples containing a large amount of inorganic fillers , leading to a reduction in the efficiency of photo-induced crosslinking and greatly limiting the application in cables that require thicker insulation or sheath layers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put into internal mixer by weight 80 parts of E-type EPDM, 10 parts of glycidyl methacrylate grafted EPDM rubber, 10 parts of maleic anhydride grafted EPDM rubber, 40 parts of calcined clay, talc 60 parts of powder, 3.5 parts of triarylsulfonium hexafluorophosphate, 1.0 parts of BDK, 1.5 parts of TMPTA, 0.3 parts of antioxidant 1010, 0.1 parts of DLTP, 3 parts of paraffin oil, 0.8 parts of silane coupling agent KH570, at 100- After mixing for 8-10 minutes at 150 ℃, it is extruded through a twin-screw extruder to make a light-crosslinked EPDM cable material; layer or sheath layer, and then in the ultraviolet radiation crosslinking equipment with H-type microwave excitation electrodeless lamp as the light source, the insulating layer or sheath layer is continuously crosslinked by ultraviolet radiation in the molten state, and the crosslinking time is for 8 seconds. The tensile strength of the ultraviolet light deep cross-linked EPDM cable material prepared in this exampl...

Embodiment 2

[0030] Put into internal mixer by weight 85 parts of E-type EPDM, 5 parts of glycidyl methacrylate grafted EPDM rubber, 10 parts of maleic anhydride grafted EPDM rubber, 60 parts of talcum powder, nano 60 parts of calcium carbonate, 2.0 parts of ferrocene-4-fluoroborate, 2.0 parts of BP, 1.5 parts of TAIC, 0.2 parts of antioxidant 1010, 0.1 parts of DLTP, 5 parts of paraffin oil, 0.8 parts of silane coupling agent KH570, After mixing evenly at 100-150°C, extrude through a twin-screw extruder to make EPDM cable material, and then melt and extrude the cable material on the conductive core of the cable to form a 2.5mm insulating layer or sheath layer. Immediately, the insulating layer or the sheath layer is subjected to online continuous ultraviolet radiation cross-linking in a molten state in an ultraviolet radiation cross-linking device using a V-shaped microwave-excited electrodeless lamp as a light source, and the cross-linking time is 1.5 seconds. The experimental results sh...

Embodiment 3

[0034] Drop into 75 parts of H type EPDM in internal mixer by weight, glycidyl methacrylate grafts 10 parts of EPDM rubbers, n-butyl acrylate grafts EPDM rubbers 15 parts, 50 parts of talcum powders, 60 parts of calcined clay, 2.0 parts of ferrocene hexafluorophosphate, 1.5 parts of BDK, 3 parts of TAIC, 0.5 parts of antioxidant 168, 0.4 parts of DTDTP, 5 parts of paraffin oil, 1 part of silane coupling agent KH550, at 100 After mixing evenly at -150℃, extrude through a twin-screw extruder to make EPDM cable material, and then melt and extrude the cable material on the conductive core of the cable to form a 3.2mm insulating layer or sheath layer, and then in In the UV radiation cross-linking equipment using D-type microwave-excited electrodeless lamp as the light source, the insulating layer or the sheath layer is subjected to online continuous UV radiation cross-linking in the molten state, and the cross-linking time is 4.5 seconds. The experimental results show that: the ten...

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PUM

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Abstract

The invention relates to an ultraviolet light deeply crosslinked ethylene-propylene-diene mischpolymere rubber cable material and a preparation method of an insulation and protective sleeve layer thereof. The invention is characterized in that: ethylene-propylene-diene mischpolymere rubber and grafting modified ethylene-propylene-diene mischpolymere rubber are used as a base stock, an inorganic filler, a photoinitiation system consisting of a cation photoinitiator and a radical photoinitiator and the like are added, and the cable material is made by blending and extrusion; and a coated cable insulation or protective sleeve layer is subjected to molten online continuous ultraviolet light radiation in an ultraviolet radiation crosslinking equipment which is provided with a thermoelectron excited medium voltage mercury arc lamp or an H-type, D-type or V-type microwave-excited electrodeless lamp as a special light source to obtain a deeply and uniformly crosslinked ethylene-propylene-diene mischpolymere rubber cable insulation or protective sleeve layer. The cable material and the preparation technique have the advantages that: the needed crosslinking equipment is low in investment; the process is simple; the operation and maintenance are convenient; the production efficiency is high; the product cost is low and product quality is high; and energy conservation and environment protection are realized. Thus, the cable material and the preparation technique can be widely used for manufacturing high-performance special crosslinked rubber wire and cable products and the like.

Description

technical field [0001] The invention belongs to the field of rubber cross-linked cables, and in particular relates to an insulation or sheath material and a preparation method for the insulation or sheath layer of EPDM cables deeply cross-linked by ultraviolet light. Background technique [0002] Ethylene Propylene Diene Monomer (EPDM) is widely used as wire and cable insulation or sheath material because of its excellent electrical properties, excellent heat resistance and aging resistance, and good low temperature flexibility, especially for mining cables and marine cables and other Special cables. Traditional EPDM rubber wire and cable insulation or sheath crosslinking methods mainly include peroxide chemical crosslinking, high energy radiation crosslinking and silane crosslinking. European patent EP1453866 discloses that a material system composed of EPDM, calcined kaolin, low-density polyethylene, silane coupling agent and paraffin is used to prepare cross-linked EPDM ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L51/06C08K13/02C08K3/36C08K3/34C08K3/26C08K3/22C08K5/5425C08K5/544C08K5/5435C08K5/548C08J3/28C08J3/24H01B7/02H01B7/17H01B13/00H01B13/14H01B13/24
Inventor 瞿保钧鲍文波叶磊高广刚瞿欣刘红施文芳高苏亮吴强华秦辉
Owner HONGLONGJIANG ORIENT SCI & TECH
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