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Modified coconut shell and natural rubber composite cable sheath material

A technology of natural rubber and composite cables, applied in the direction of insulated cables, rubber insulators, cables, etc., can solve the problems of poor ozone resistance and UV resistance, limited application, decline in physical properties, rubber stickiness, etc., and improve interface compatibility properties, reduce crosslink density, and improve cohesion

Inactive Publication Date: 2014-12-10
ANHUI LAND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The key factor that determines the performance of natural fiber reinforced polymer composites is the interfacial bonding force between the two. The cellulose content in coconut shells is as high as 53%. People discard coconut shells after eating coconut meat. The application of fibers causes great waste. Natural rubber is a linear natural polymer compound, and its chemical composition is mainly cis-1,4-polyisoprene, which contains a large number of unsaturated double bonds, which is easy to react with oxygen in the air. Autocatalytic reaction, molecular chain scission or multi-degree cross-linking, rubber viscous and cracks, physical properties decline, thermal oxygen aging resistance, ozone resistance and UV resistance are poor, which limits the use in cable sheath materials. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A modified coconut shell natural rubber composite cable sheath material, its raw materials include by weight: 100 parts of natural rubber, 8.5 parts of maleic anhydride, 37 parts of coconut shell fiber, 17.5 parts of diatomaceous earth, 66.5 parts of nylon PA-66, 13.5 parts of calcined clay, 36 parts of white carbon black, 26 parts of carbon black, 23 parts of attapulgite, 4.2 parts of zinc oxide, 1.95 parts of sulfur, 1.6 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 3.6 parts of two (3-triethoxysilylpropyl) tetrasulfides, 1.65 parts of stearic acid, wherein the particle diameter of coconut shell fiber is 25-28mm;

[0013] During the preparation process, the natural rubber is placed in a vacuum oven for 27 hours by weight, and the temperature of the vacuum oven is 53°C, and then it is sent into the torque rheometer, the temperature is controlled at 127°C, and the torque rheometer speed is 53rpm , then add maleic anhydride for mixing, the ...

Embodiment 2

[0015] A modified coconut shell natural rubber composite cable sheath material, its raw materials include by weight: 100 parts of natural rubber, 8 parts of maleic anhydride, 40 parts of coconut shell fiber, 15 parts of diatomaceous earth, 10 parts of nylon PA-66, 10 parts of calcined clay, 40 parts of white carbon black, 20 parts of carbon black, 40 parts of attapulgite, 4 parts of zinc oxide, 2 parts of sulfur, 1 part of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 4 parts of bis(3-triethoxysilylpropyl) tetrasulfide, 1.5 parts of stearic acid, wherein the particle diameter of coconut shell fiber is 20-30mm;

[0016] In the preparation process, the natural rubber is placed in a vacuum oven for 30 hours by weight, and the temperature of the vacuum oven is 50°C, and then it is sent into the torque rheometer, the temperature is controlled at 130°C, and the speed of the torque rheometer is 50rpm , then add maleic anhydride for mixing, the mixing time is 7mi...

Embodiment 3

[0018]A modified coconut shell natural rubber composite cable sheath material, its raw materials include by weight: 100 parts of natural rubber, 10 parts of maleic anhydride, 30 parts of coconut shell fiber, 20 parts of diatomaceous earth, 665 parts of nylon PA-665 parts, 15 parts of calcined clay, 30 parts of white carbon black, 30 parts of carbon black, 20 parts of attapulgite, 4.5 parts of zinc oxide, 1.5 parts of sulfur, 2 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 3 parts of bis(3-triethoxysilylpropyl) tetrasulfide, 2 parts of stearic acid, wherein the particle diameter of coconut shell fiber is 20-30mm;

[0019] During the preparation process, the natural rubber is placed in a vacuum oven for 24 hours by weight, and the temperature of the vacuum oven is 55 ° C, and then sent to the torque rheometer, the temperature is controlled at 125 ° C, and the torque rheometer speed is 55 rpm , then add maleic anhydride for mixing, the mixing time i...

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Abstract

The invention discloses a modified coconut shell and natural rubber composite cable sheath material which is characterized by comprising the following raw materials in parts by weight: 100 parts of natural rubber, 8-10 parts of maleic anhydride, 30-40 parts of coconut shell fiber, 15-20 parts of kieselguhr, 5-10 parts of nylon PA, 10-15 parts of calcined clay, 30-40 parts of white carbon black, 20-30 parts of carbon black, 20-40 parts of attapulgite, 4-4.5 parts of zinc oxide, 1.5-2 parts of sulfur, 1-2 parts of vulcanization accelerant N-cyclohexyl-2-benzothiazole sulfonamide, 3-4 parts of bi(3-triethoxy silylation propyl) tetrasulfide and 1.5-2 parts of stearic acid, wherein the particle size of the coconut shell fiber is 20-30mm. The modified coconut shell and natural rubber composite cable sheath material is good in physical and mechanical properties and relatively excellent in thermo-oxidative aging resistance, ozone resistance and ultraviolet resistance.

Description

technical field [0001] The invention relates to the technical field of composite cable sheaths, in particular to a modified coconut shell natural rubber composite cable sheath material. Background technique [0002] The key factor that determines the performance of natural fiber reinforced polymer composites is the interfacial bonding force between the two. The cellulose content in coconut shells is as high as 53%. People discard coconut shells after eating coconut meat. The application of fibers causes great waste. Natural rubber is a linear natural polymer compound, and its chemical composition is mainly cis-1,4-polyisoprene, which contains a large number of unsaturated double bonds, which is easy to react with oxygen in the air. Autocatalytic reaction, molecular chain scission or multi-degree cross-linking, rubber viscous and cracks, physical properties decline, thermal oxygen aging resistance, ozone resistance and UV resistance are poor, which limits the use in cable she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08L1/02C08L1/08C08L77/06C08F253/00C08F222/06C08K13/02C08K3/34C08K3/36C08K3/04C08K3/22C08K3/06C08K5/47C08K5/548C08K5/09H01B7/17H01B3/28
Inventor 李正祥刁宏明王赵兰刘琴
Owner ANHUI LAND GRP
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