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Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof

A technology for EPDM rubber and cable insulation, which is applied in the direction of rubber insulators, insulated conductors, and insulated cables, can solve the problems that EPDM rubber is difficult to talk about and cannot be applied, and achieves simple cross-linking process, low product cost, The effect of low equipment investment

Active Publication Date: 2009-05-20
HONGLONGJIANG ORIENT SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocrosslinking of EPDM has not been successful in the application of the cable industry. The main reason is that the EPDM rubber used as a cable usually needs to add 50-60% by weight of reinforcing inorganic fillers, which contain a large amount of inorganic fillers. EPDM rubber is difficult to cross-link through ultraviolet light
Therefore, the photocrosslinking technology of EPDM materials containing a large amount of reinforcing fillers has not been reported so far, let alone their application in the wire and cable industry

Method used

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  • Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof
  • Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof
  • Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]100 parts of E-type EPDM, 40 parts of calcium carbonate, 60 parts of talcum powder, 0.8 part of BDK, 1 part of TMPTA, 5 parts of paraffin oil, 0.8 part of silane coupling agent KH570, antioxidant 0.2 parts of 1010, 0.1 parts of DLTP, mixed at 100-150°C for 8-10 minutes, and then extruded into sheets through a twin-screw extruder to obtain light-crosslinked EPDM cable materials; The conductive core of the cable is melt-extruded and coated with the cable material to form an insulating layer, and then it is heated at a wavelength of 200-400nm and a light intensity of 400-2000mW / cm 2 Under the ultraviolet light source, the insulating layer is cross-linked by ultraviolet light irradiation.

[0025] The detection data of the ultraviolet light cross-linked EPDM cable material properties prepared by this example are as follows:

[0026]

[0027] *Heat aging condition: 135±2℃×168 hours.

Embodiment 2

[0029] Put 100 parts of E-type EPDM into the internal mixer by weight, 30 parts of nanometer calcium carbonate, 30 parts of talcum powder, 60 parts of pottery clay, 1.5 parts of BP, 1.5 parts of TAIC, 5 parts of paraffin oil, 0.8 part of silane coupling agent KH570 , 0.2 part of antioxidant 1010, 0.1 part of DLTP, mixed uniformly at 100-150 ° C and extruded into flakes, other operations were the same as in Example 1.

[0030] The detection data of the ultraviolet light cross-linked EPDM cable material properties prepared by this example are as follows:

[0031]

[0032] *Heat aging condition: 135±2℃×168 hours.

Embodiment 3

[0034] Put 100 parts of E-type EPDM, 50 parts of talcum powder, 70 parts of calcined clay, 1.2 parts of BDK, 0.8 parts of BP, 3 parts of TAIC, 5 parts of paraffin oil, and 1 part of silane coupling agent KH550 into the internal mixer by weight , 0.6 parts of antioxidant 168, 0.3 parts of DTDTP, mixed uniformly at 100-150 ° C and extruded into flakes, other operations are the same as in Example 1. The detection data of the ultraviolet light cross-linked EPDM cable material properties prepared by this example are as follows:

[0035]

[0036] *Heat aging condition: 135±2℃×168 hours.

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PUM

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Abstract

The invention discloses an ultraviolet cross-linking EPDM (ethylene propylene diene monomer) rubber cable insulation material and a preparation method thereof. The method is characterized in that: by weight, 100 portions of EPDM rubber, 100 portions to 120 portions of inorganic filling, 0.5 portion to 5.0 portions of ultrasonic initiator, 0.5 portion to 5.0 portions of polyfunctional cross-linking agent, 5.0 portions to 10.0 portions of softener, 0.8 portion to 1.2 portions of silane coupling agent and 0.01 portion to 1.0 portion of complex antioxidant are evenly mixed and extruded at the temperature of 100 DEG C to 150 DEG C, thereby obtaining the ultraviolet cross-linking EPDM rubber cable insulation material; then the wire core is fused and extruded coating to form an insulation layer or a protective coating; and ultraviolet cross linking is carried out under 200nm to 400nm of wave length and 400mW / cm<2> to 2000mW / cm<2> of light intensity. The cable insulation material has tensile strength of larger than 6.5MPa, elongation at break of higher than 300 percent and volume resistivity of higher 10<12>Omega question mark cm, and can pass a thermal aging test under the temperature of 135 DEG C for 168h.

Description

Technical field: [0001] The invention belongs to the technical field of preparation methods of rubber cable materials, and in particular relates to an insulating material for ultraviolet light crosslinked EPDM cables and a preparation method thereof. Background technique: [0002] Ethylenepropylene diene monomer (EPDM) is widely used as wire and cable insulation materials, especially mine cables, because of its excellent electrical properties, high heat and aging resistance, and good low temperature flexibility. The traditional cross-linking method of EPDM wire and cable insulation layer mainly adopts peroxide continuous vulcanization method. European patent EP1453866 describes the preparation of cross-linked EPDM soft rubber under the chemical cross-linking conditions initiated by heat of dicumyl peroxide with a material system composed of EPDM, calcined kaolin, low-density polyethylene, silane coupling agent and paraffin. For cables, the tensile strength of the product is...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02B29C71/04B29C35/08H01B3/28H01B7/17B29C47/02
Inventor 瞿保钧鲍文波宋旭鹏马树军吴强华贾振山施文芳李巍马巍刘红
Owner HONGLONGJIANG ORIENT SCI & TECH
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