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Irradiation crosslinking low-temperature-resistant flexible oil-resistant halogen-free flame-retardant cable material for locomotive cables at 125 DEG C

A technology for flame-retardant cable materials and locomotive cables, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems that are difficult to achieve oil resistance, softness, low temperature resistance, etc., achieve low temperature resistance and oil resistance, improve mechanical properties, improve The effect of tensile properties

Active Publication Date: 2016-10-12
中广核三角洲(江苏)塑化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, conventional low-smoke, halogen-free, flame-retardant polyolefin materials are difficult to achieve a balance between oil resistance, softness, and low temperature resistance. At the same time, they need to pass the single vertical combustion test of IEC60332-1. with a certain degree of difficulty

Method used

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  • Irradiation crosslinking low-temperature-resistant flexible oil-resistant halogen-free flame-retardant cable material for locomotive cables at 125 DEG C
  • Irradiation crosslinking low-temperature-resistant flexible oil-resistant halogen-free flame-retardant cable material for locomotive cables at 125 DEG C

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of Examples 1~3: weigh the materials in the raw material formula of the cable material according to the parts by weight, put them into a high-speed mixer with a temperature of 60~80°C and stir for 5~10 minutes, discharge the materials evenly, and pass through the temperature Mix with a pressurized internal mixer at 130~140°C; then use a twin-screw extruder with an extrusion temperature of 110~150°C to extrude, granulate and dry to obtain radiation-crosslinkable, low-temperature-resistant, soft, oil-resistant Granules of halogen-free flame retardant cable compound.

[0037] The pellets are plasticized on an open mill, and flakes are produced, and the temperature of the open mill is 130~145°C; the obtained flakes are placed in a hydraulic press at 160~170°C to preheat for 6 minutes, and then pressurized and heated for 4 minutes , the pressure is greater than 15MPa, then pressurized and cooled to room temperature.

[0038] Finally, the test piece is...

Embodiment 1

[0042] In embodiment 1, select the ethylene-vinyl acetate copolymer that VA content is respectively 50% and 28%, the acrylonitrile weight content of carboxylated nitrile rubber is 28%, and carboxyl weight content is 7%, Mooney viscosity [ML( 1+4) 100°C] is 50, the VA content of the comonomer EVA in the EVA-g-PU copolymer is 28%, the weight content of the PU prepolymer is 8%, and the maleic anhydride grafted EPDM copolymer The grafting material is 0.8%, both aluminum hydroxide and magnesium hydroxide are treated with silane surface, and the particle size is 0.8-1.5μm.

Embodiment 2

[0043] In embodiment 2, select VA content to be respectively the ethylene-vinyl acetate copolymer of 40% and 28%, the acrylonitrile weight content of carboxylated nitrile rubber is 33%, and carboxyl weight content is 1%, Mooney viscosity [ML( 1+4) 100°C] is 45, the VA content of the comonomer EVA in the EVA-g-PU copolymer is 28%, the weight content of the PU prepolymer is 10%, and the maleic anhydride grafted EPDM copolymer The grafting material is 0.8%, both aluminum hydroxide and magnesium hydroxide are treated with silane surface, and the particle size is 0.8-1.5μm.

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Abstract

Provided is an irradiation crosslinking low-temperature-resistant flexible oil-resistant halogen-free flame-retardant cable material for locomotive cables at 125 DEG C. The cable material is characterized by being prepared from, by weight, 25-40 parts of ethylene-vinyl acetate copolymer with high vinyl acetate content, 15-30 parts of ethylene-vinyl acetate copolymer with low vinyl acetate content, 15-30 parts of carboxylated nitrile rubber, 15-25 parts of EVA-g-PU copolymer, 5-15 parts of maleic anhydride grafted ethylene-propylene-diene monomer copolymer, 90-110 parts of aluminum hydroxide, 30-50 parts of magnesium hydroxide, 3-5 parts of zinc borate, 0.8-1.2 parts of methacryloxy propyl trimethoxyl silane, 3-6 parts of silicone master batches, 0.8-1.2 parts of pentaerythrite tetra[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 0.5-2 parts of dilauryl thiodipropionate and 1.5-2.5 parts of triallylisocyanurate. The cable material has the advantages of being prominent in oil resistance, super flexible, easy to lay, good in low temperature resistance, good in flame retardance, low in smoke, free of toxicity and the like.

Description

[0001] Involved areas [0002] The invention relates to the field of low-smoke, halogen-free, and flame-retardant cable materials, in particular to a radiation-crosslinked, low-temperature-resistant, soft, oil-resistant, and halogen-free flame-retardant cable material for locomotive cables at 125°C. Background technique [0003] With the rapid development of the rail transit industry, the introduction of EU ROHS and REACH environmental protection regulations, and the need for safety, the requirements for rail transit cables are getting higher and higher, and they must comply with GB / T 12528.11-2004, TJ / CL 254- 2013, EN 50306 and other rolling stock cable standards not only require the safety, environmental protection, and energy saving of locomotive cables, but also have higher and higher requirements for oil resistance, high and low temperature resistance, and flame retardancy. In addition, considering the cable laying process The problem of convenience, the soft performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L31/04C08L23/08C08L13/00C08L87/00C08L51/04C08L83/04C08K13/06C08K3/22C08K5/3492C08K3/38C08K5/134H01B7/295H01B3/44
CPCC08K2201/003C08L23/0853C08L31/04C08L2201/02C08L2201/08C08L2201/22C08L2203/202C08L2205/025C08L2205/035C08L2312/06H01B3/441H01B7/295C08L13/00C08L87/005C08L51/04C08L83/04C08K13/06C08K2003/2227C08K5/34924C08K2003/2224C08K2003/387C08L51/003
Inventor 曾光新高晓慧
Owner 中广核三角洲(江苏)塑化有限公司
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