Low smoke zero halogen flame-retardant mould shrinkage sleeve and preparation method as well as application thereof

A shrinking, linear low-density technology, which is applied in the field of low-smoke, halogen-free flame-retardant molded shrink sleeves and its preparation, can solve the problems of low cost performance, limited flame-retardant effect, and large smoke generation, and meets low equipment requirements. , small amount of smoke, and simple preparation method

Active Publication Date: 2012-01-18
广州凯恒科塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many halogen-free flame-retardant shrink sleeve products on the market at home and abroad. The halogen-free flame retardants in the formula are mostly phosphorus-nitrogen intumescent flame re

Method used

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  • Low smoke zero halogen flame-retardant mould shrinkage sleeve and preparation method as well as application thereof
  • Low smoke zero halogen flame-retardant mould shrinkage sleeve and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] Take ethylene-vinyl acetate copolymer (EVA, the content of vinyl acetate accounts for 28% by mass, the melt index is 4.5g / 10min, the French company Atofina, the brand is EVAtane 2803) 80kg, linear low density polyethylene ( LLDPE, Saudi Basic Industries Corporation, brand 218-W) 20kg, maleic anhydride functional group grafted ethylene-vinyl acetate copolymer (grafting rate 1.2%, melt index 1.1g / 10min, Shanghai Jiuju Polymer Material Co., Ltd., the brand name is JCP-851) 10kg, red phosphorus powder 10kg (Qingyuan Yicheng Flame Retardant Material Co., Ltd.), expandable graphite (average particle size is 400 mesh, expansion ratio is 150ml / g, Qingdao Tianhe Graphite Co., Ltd. Company) 20kg, magnesium hydroxide (white powder, no mechanical impurities, MgO content> 67% by mass, average particle size less than 200nm, American Albemarle company, brand name H5) 50kg, 0.5kg antioxidant 1010, thiodi Dioctadecyl propionate (DSTP) 2kg, zinc stearate (ZnSt) 3kg, trim...

Example Embodiment

[0046] Example 2

[0047] Take ethylene-vinyl acetate copolymer (EVA, the content of vinyl acetate accounts for 28% by mass, the melt index is 4.5g / 10min, the French company Atofina, the brand is EVAtane 2803) 45kg, ethylene-vinyl acetate copolymer (EVA, vinyl acetate content accounted for 14% by mass, melt index 3.5g / 10min, Japan Mitsui Group, grade P1405) 50kg, maleic anhydride functional group grafted ethylene-vinyl acetate copolymer (Shanghai Jiuju Polymer Materials Co., Ltd., brand name JCT-1C) (grafting rate 1.0%, melt index 2.0g / 10min) 8kg, red phosphorus powder 11kg, expandable graphite (average particle size is 400 mesh, expansion ratio 150ml / g, Qingdao Tianhe Graphite Co., Ltd.) 17kg, magnesium hydroxide (white powder, no mechanical impurities, MgO content> 67% by mass, average particle size less than 200nm, American Albemarle company, brand name H5) 40kg, 0.25kg antioxidant 1076, di(octadecyl thiodipropionate) (DSTP) 0.25kg, n-butyl stearate (BS) 1kg, triallyl isocyan...

Example Embodiment

[0049] Example 3

[0050] Take ethylene-vinyl acetate copolymer (EVA, the content of vinyl acetate accounts for 28% by mass, the melt index is 4.5g / 10min, French Atofina company, the brand is EVAtane 2803) 60kg, ethylene-vinyl acetate copolymer (EVA, vinyl acetate content accounted for 14% by mass, melt index 3.5g / 10min, Japan Mitsui Group, brand P1405) 25kg, maleic anhydride functional group grafted ethylene-vinyl acetate copolymer (Shanghai Jiuju Polymer Material Co., Ltd., brand name JCT-1C) (grafting rate 1.0%, melt index 2.0g / 10min) 15kg, red phosphorus powder (Qingyuan Yicheng Flame Retardant Material Co., Ltd.) 18kg, expandable graphite ( The average particle size is 400 mesh, the expansion ratio is 150ml / g, the carbon content is 90-99.9%, Qingdao Tianhe Graphite Co., Ltd.) 10kg, magnesium hydroxide (white powder, no mechanical impurities, MgO content> 67% by mass , The average particle size is less than 200nm, the specific surface area is 4.0-6.0m 2 / g, U.S. Albemarle co...

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Abstract

The invention discloses a low smoke zero halogen flame-retardant mould shrinkage sleeve and a preparation method as well as application thereof. The low smoke zero halogen flame-retardant mould shrinkage sleeve comprises the following raw materials in parts by weight: 85-100 parts of polyolefine resin, 8-15 parts of maleic anhydride functional group-grafted ethylene-vinyl acetate copolymer, 3-20 parts of red phosphorus powder, 4-30 parts of expandable graphite, 10-90 parts of magnesium hydroxide, 0.5-2.5 parts of antioxidant, 1-3 parts of lubricant, 1-2.5 parts of cross-linking auxiliary agent and 5-8 parts of black master batch. The preparation method comprises the following steps of: uniformly mixing the raw materials; extruding by using a double-screw extruder at the temperature of 100-160 DEG C; performing wire drawing, air cooling and granulation; injecting the granular material formed by granulation into the mould shrinkage sleeve; performing irradiation at the dosage of 8-12Mrad; and then extending and drawing the mould shrinkage sleeve, which is subjected to irradiation cross-linking, at the temperature of 140-160 DEG C and cooling and forming to obtain the low smoke zero halogen flame-retardant mould shrinkage sleeve. The preparation method is simple; an obtained product has superior flame retardant performance and low smoke formation; meanwhile, superior mechanical property, electrical insulation performance and thermal resistance performance are kept.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a flame-retardant mold shrink sleeve with polyolefin as a matrix resin, in particular to a low-smoke, halogen-free flame-retardant mold shrink sleeve, a preparation method and application thereof. Background technique [0002] In the design and assembly of aviation, aerospace and navigation equipment, the electronic equipment contained in the electronic system is more and more complex, and the connection between various electronic equipment units often requires a large number of wires and cables. In the process of electrical appliance assembly, a lot of stress relief, sealing and mechanical protection are required at the cable terminal connection, cable opening and cable bifurcation connection. In the early days, winding tape was used for winding treatment, but it was troublesome to operate, low in efficiency, and easy to loosen. Disadvantages such as detachment, unsightly appearance and l...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08L23/16C08L51/06C08K13/04C08K3/02C08K7/24C08K3/22C08K5/134C08K5/372H01R4/72
Inventor 胡晖冉祥海黄雷王飚程根水聂飞郑凯航刘志辉
Owner 广州凯恒科塑有限公司
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