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High temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material and method for preparing high temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material

A flame-retardant cable and self-crosslinking technology, which is applied in the direction of insulated conductors, insulated cables, organic insulators, etc., can solve problems such as troublesome and high costs, and achieve the effect of reducing production costs

Active Publication Date: 2013-04-03
SHENZHEN WOER HEAT SHRINKABLE MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above method of crosslinking by accelerator or ultraviolet light irradiation is cumbersome and costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] By weight, 100 parts of ethylene-vinyl acetate copolymer (EVA), 5 parts of maleic anhydride copolymer modified ethylene-vinyl acetate copolymer, 100 parts of magnesium hydroxide flame retardant, 2 parts of antioxidant 1010, 1 part of zinc stearate, 2 parts of dicumyl peroxide crosslinking agent, knead evenly at a temperature of 100°C to 150°C and extrude to form a high-temperature self-crosslinking halogen-free flame-retardant cable compound; then at a temperature of 100°C to Under the temperature condition of 150°C, the cable material is melted and extruded on the conductive core of the cable to form an insulating layer or a sheath layer.

[0028] The above-mentioned wires and cables were measured, and the results are as follows: flame retardant oxygen index 36; operating temperature range -40~150°C; tensile strength ≥ 11.8MPa; elongation at break ≥ 220%; insulation voltage: 6000V (insulation thickness 0.8mm ), no breakdown; thermal shock: 180°C, 4 hours, no cracks; vo...

Embodiment 2

[0030] In parts by weight, 100 parts of EPDM rubber, 10 parts of maleic anhydride copolymer modified ethylene-acrylate copolymer, 150 parts of high molecular weight ammonium polyphosphate flame retardant, 1 part of antioxidant 944, 1 part of anti-oxidant Copper agent MD-1024, 2 parts of magnesium stearate, 3 parts of bis-pentasulfurizing agent, 20 parts of polyolefin elastomer, silane coupling agent kh550, 1 part of color masterbatch, knead evenly at a temperature of 100℃~150℃ After extruding to form a high-temperature self-crosslinking halogen-free flame-retardant cable material; then, at a temperature of 100°C to 150°C, melt-extrude and coat the cable material on the conductive core of the cable to form an insulating layer or a sheath layer.

[0031] The above-mentioned wires and cables were measured, and the results are as follows: flame retardant oxygen index 39; operating temperature range -40~150°C; tensile strength ≥ 10.8MPa; elongation at break ≥ 230%; insulation voltag...

Embodiment 3

[0033] By weight, 50 parts of ethylene-methyl acrylate copolymers, 50 parts of EPDM rubber, 15 parts of maleic anhydride copolymer modified ethylene-acrylate copolymers, 20 parts of modified magnesium hydroxide flame retardants, 150 parts of high molecular weight ammonium polyphosphate flame retardant, 1 part of antioxidant DLTP (dilauryl thiodipropionate), 1 part of antioxidant 944, 2 parts of anti-copper agent MD-1024, 4 parts of magnesium stearate, 2 parts of dicumyl peroxide crosslinking agent, 3 parts of bis-dipenta vulcanizing agent, 20 parts of polyolefin elastomer, silane coupling agent kh550, 2 parts of color masterbatch, after mixing uniformly at a temperature of 100°C to 150°C Extruding to form a high-temperature self-crosslinking halogen-free flame-retardant cable material; then, under the temperature condition of 100°C to 150°C, melt-extruding and coating the cable material on the conductive core of the cable to form an insulating layer or a sheath layer.

[0034]...

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Abstract

The invention discloses a high temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material. The cable insulation material or sheath material comprises the following components in parts by weight: 100 parts of ethylene and copolymer thereof and / or ethylene propylene diene monomer, 0-20 parts of compatilizer, 20-250 parts of halogen-free flame retardant, 0-5 parts of antioxidant, 0-5 parts of lubricating agent, 0.01-5 parts of peroxide crosslinking agent, 0-40 parts of polymer elastomer, 0-3 parts of coupling agent and 0-20 parts of color masterbatch; and the ethylene and the copolymer thereof are selected from one or a plurality of the following materials of ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate and the like. The high temperature peroxide crosslinking agent crosslinks under the temperature condition of above 150 DEG C only, during a cable material mixing extrusion and insulating layer or sheath layer formation process, chemical crosslinking or micro-crosslinking cannot be caused, but the high temperature peroxide crosslinking agent generates a crosslinking function when the temperature is higher than 150 DEG C in the case of fire, so that the production cost is lowered.

Description

Technical field [0001] The invention relates to halogen-free flame-retardant cable insulation materials or sheath materials and preparation methods. Background technique [0002] Currently, people use accelerator irradiation or ultraviolet irradiation cross-linking methods to modify cables, and these methods are completed when the product is produced. [0003] However, the above-mentioned cross-linking methods through accelerator or ultraviolet irradiation are troublesome and costly. Contents of the invention [0004] The object of the present invention is to provide a halogen-free flame-retardant cable insulation material or sheath material that can be automatically cross-linked under high temperature conditions or when a fire occurs, and a preparation method thereof. [0005] In order to achieve the above objects, the high-temperature self-crosslinking halogen-free flame-retardant cable insulation material or sheath material provided by the present invention includes th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L31/04C08L33/08C08L23/06C08L23/16C08K13/02C08K5/14C08K3/22C08K3/26C08K3/38C08K3/32C08K5/3492C08J3/24H01B3/44H01B7/295
Inventor 周和平桂全红
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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