CN104194239A - Modified coconut shell and natural rubber composite cable sheath material - Google Patents
Modified coconut shell and natural rubber composite cable sheath material Download PDFInfo
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- CN104194239A CN104194239A CN201410425093.2A CN201410425093A CN104194239A CN 104194239 A CN104194239 A CN 104194239A CN 201410425093 A CN201410425093 A CN 201410425093A CN 104194239 A CN104194239 A CN 104194239A
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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
The present invention relates to compound cable sheath technical field, relate in particular to a kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
Background technology
The key factor that determines natural fiber enhancing polymkeric substance composite wood performance is interface binding power between the two, in Exocarpium cocois (Cocos nucifera L), content of cellulose is up to 53%, people abandon Exocarpium cocois (Cocos nucifera L) after eating up Endosperm Cocois, for considering the application of shell inner fiber, cause significant wastage, it in natural rubber, is linear natural high moleculer eompound, chemical composition is mainly cis-1, 4-polyisoprene, contain a large amount of unsaturated double-bonds, easily carry out autocatalytic reaction with airborne oxygen, molecule chain rupture or many degree are crosslinked, there is glutinousization and be full of cracks in rubber, physicals declines, hot-air aging resistance, the poor application having limited in cable sheath material of ozone resistance and anti-ultraviolet property.
Summary of the invention
The present invention proposes a kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material, physical and mechanical properties is good, and heat oxygen aging resistance, resistance to ozone and anti-ultraviolet property are more excellent.
A kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material that the present invention proposes, its raw material comprises by weight: 100 parts of natural rubbers, maleic anhydride 8-10 part, coir 30-40 part, diatomite 15-20 part, nylon PA-665-10 part, calcinated argil 10-15 part, white carbon black 30-40 part, carbon black 20-30 part, attapulgite 20-40 part, zinc oxide 4-4.5 part, sulphur 1.5-2 part, vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide 1-2 part, bis(3-triethoxy silylpropyl)tetrasulfide 3-4 part, stearic acid 1.5-2 part, wherein the particle diameter of coir is 20-30mm,
In preparation process, by weight natural rubber is placed in to vacuum drying oven 24-30h, the temperature of vacuum drying oven is 50-55 ℃, then send in torque rheometer, temperature is controlled at 125-130 ℃, torque rheometer rotating speed is 50-55rpm, then add maleic anhydride to carry out mixing, mixing time is 5-7min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 60-70 ℃, be 30-34h time of drying, then the material obtaining is sent into the 5-7min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1-2min, temperature is increased to 50-60 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 3-5min, then add sulphur mixing 5-10min, thin-pass 5-6 time, slice, after placement 30-34h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 155-160 ℃, curing time is that 2-3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material,
Preferably, its raw material comprises by weight: 100 parts of natural rubbers, maleic anhydride 8-9 part, coir 35-38 part, diatomite 16-18 part, nylon PA-666-8 part, calcinated argil 12-14 part, white carbon black 34-38 part, carbon black 25-28 part, attapulgite 22-24 part, zinc oxide 4-4.5 part, sulphur 1.8-2 part, vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide 1.5-1.8 part, bis(3-triethoxy silylpropyl)tetrasulfide 3.5-3.8 part, stearic acid 1.6-1.8 part, wherein the particle diameter of coir is 25-28mm.
Preferably, its raw material comprises by weight: 100 parts of natural rubbers, 8.5 parts of maleic anhydrides, 37 parts of coirs, 17.5 parts, diatomite, nylon PA-666.5 part, 13.5 parts of calcinated argils, 36 parts of white carbon blacks, 26 parts of carbon blacks, 23 parts of attapulgites, 4.2 parts, zinc oxide, 1.95 parts, sulphur, 1.6 parts of vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamides, 3.6 parts of bis(3-triethoxy silylpropyl)tetrasulfides, 1.65 parts of stearic acid, wherein the particle diameter of coir is 25-28mm.
Preferably, in preparation process, by weight natural rubber is placed in to vacuum drying oven 26-28h, the temperature of vacuum drying oven is 52-54 ℃, then send in torque rheometer, temperature is controlled at 126-128 ℃, torque rheometer rotating speed is 52-54rpm, then add maleic anhydride to carry out mixing, mixing time is 5-6min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 65-68 ℃, be 31-33h time of drying, then the material obtaining is sent into the 6-7min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1.5-2min, temperature is increased to 55-58 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 3-4min, then add sulphur mixing 6-8min, thin-pass 5-6 time, slice, after placement 31-33h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 156-158 ℃, curing time is that 2.5-3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
Preferably, in preparation process, by weight natural rubber is placed in to vacuum drying oven 27h, the temperature of vacuum drying oven is 53 ℃, then send in torque rheometer, temperature is controlled at 127 ℃, torque rheometer rotating speed is 53rpm, then add maleic anhydride to carry out mixing, mixing time is 5.5min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 67 ℃, be 32h time of drying, then the material obtaining is sent into the 6min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1.8min, temperature is increased to 57 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 4min, then add sulphur mixing 7min, thin-pass 6 times, slice, after placement 32h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 157 ℃, curing time is that 2.5min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
In the present invention, coir carries out modification by esterification, esterification can effectively improve the hydrophobicity of fiber, can reduce fiber surface polarity, make it be easy to disperse in matrix, thereby improve the interface compatibility of fiber and polymkeric substance, maleic anhydride graft natural rubber can with the coir generation chemical reaction of esterification, the coated one deck rubber layer in coir surface of esterification, reduced alternate interfacial tension, the boundling of fiber and the thin spot of end have been reduced, improved alternate cohesive force, stress transmits uniformly at compliant interface, obtain higher mechanical property, the tensile strength of product, tear strength, hardness and stress at definite elongation significantly strengthen, the hot-air aging resistance of while product, resistance to ozone and anti-ultraviolet property strengthen greatly, thereby the oh group on coir surface can adsorb N cyclohexyl 2 benzothiazole sulfenamide reduction cross-linking density in addition, coupling agent bis(3-triethoxy silylpropyl)tetrasulfide add the cross-linking density that can obviously increase product, because the hydroxyl on bis(3-triethoxy silylpropyl)tetrasulfide and coir surface reacts when mixing, reduced the hydroxy radical content on coir surface, therefore the amount of coir absorption N cyclohexyl 2 benzothiazole sulfenamide reduces, and in sulfidation, bis(3-triethoxy silylpropyl)tetrasulfide S4 ring is opened, with unsaturated double-bond in the rubber formation crosslinking structure that reacts, above-mentioned material mating reaction, can keep under the prerequisite of higher hardness, tensile strength, heatproof air aging performance significantly improves, add therein white carbon black, carbon black and attapulgite are as filler, its dispersiveness is high, and can improve elongation rate of tensile failure, reinforcing effect is good, strong with the interface binding power of modified natural rubber, stress is more easily transferred on fiber by rubber matrix, greatly improved the mechanical property of matrix material, heatproof air aging performance, add nylon PA-66, diatomite, hard(carbon)black and calcinated argil reinforcing filler, reinforcing effect is remarkable, smooth surface and shrinking percentage are little, anti-ultraviolet property further strengthens.Hot-air aging resistance of the present invention, resistance to ozone and uviolresistance are good, and physical and mechanical properties is excellent, long service life.
Embodiment
Embodiment 1
A kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material, its raw material comprises by weight: 100 parts of natural rubbers, 8.5 parts of maleic anhydrides, 37 parts of coirs, 17.5 parts, diatomite, nylon PA-666.5 part, 13.5 parts of calcinated argils, 36 parts of white carbon blacks, 26 parts of carbon blacks, 23 parts of attapulgites, 4.2 parts, zinc oxide, 1.95 parts, sulphur, 1.6 parts of vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamides, 3.6 parts of bis(3-triethoxy silylpropyl)tetrasulfides, 1.65 parts of stearic acid, wherein the particle diameter of coir is 25-28mm;
In preparation process, by weight natural rubber is placed in to vacuum drying oven 27h, the temperature of vacuum drying oven is 53 ℃, then send in torque rheometer, temperature is controlled at 127 ℃, torque rheometer rotating speed is 53rpm, then add maleic anhydride to carry out mixing, mixing time is 5.5min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 67 ℃, be 32h time of drying, then the material obtaining is sent into the 6min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1.8min, temperature is increased to 57 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 4min, then add sulphur mixing 7min, thin-pass 6 times, slice, after placement 32h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 157 ℃, curing time is that 2.5min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
Embodiment 2
A kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material, its raw material comprises by weight: 100 parts of natural rubbers, 8 parts of maleic anhydrides, 40 parts of coirs, 15 parts, diatomite, nylon PA-6610 part, 10 parts of calcinated argils, 40 parts of white carbon blacks, 20 parts of carbon blacks, 40 parts of attapulgites, 4 parts, zinc oxide, 2 parts, sulphur, 1 part of vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide, 4 parts of bis(3-triethoxy silylpropyl)tetrasulfides, 1.5 parts of stearic acid, wherein the particle diameter of coir is 20-30mm;
In preparation process, by weight natural rubber is placed in to vacuum drying oven 30h, the temperature of vacuum drying oven is 50 ℃, then send in torque rheometer, temperature is controlled at 130 ℃, torque rheometer rotating speed is 50rpm, then add maleic anhydride to carry out mixing, mixing time is 7min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 60 ℃, be 34h time of drying, then the material obtaining is sent into the 5min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 2min, temperature is increased to 50 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 5min, then add sulphur mixing 5min, thin-pass 6 times, slice, after placement 30h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 160 ℃, curing time is that 2-3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material,
Embodiment 3
A kind of modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material, its raw material comprises by weight: 100 parts of natural rubbers, 10 parts of maleic anhydrides, 30 parts of coirs, 20 parts, diatomite, nylon PA-665 part, 15 parts of calcinated argils, 30 parts of white carbon blacks, 30 parts of carbon blacks, 20 parts of attapulgites, 4.5 parts, zinc oxide, 1.5 parts, sulphur, 2 parts of vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamides, 3 parts of bis(3-triethoxy silylpropyl)tetrasulfides, 2 parts of stearic acid, wherein the particle diameter of coir is 20-30mm;
In preparation process, by weight natural rubber is placed in to vacuum drying oven 24h, the temperature of vacuum drying oven is 55 ℃, then send in torque rheometer, temperature is controlled at 125 ℃, torque rheometer rotating speed is 55rpm, then add maleic anhydride to carry out mixing, mixing time is 5min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 70 ℃, be 30h time of drying, then the material obtaining is sent into the 7min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1min, temperature is increased to 60 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 3min, then add sulphur mixing 10min, thin-pass 5 times, slice, after placement 34h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 155 ℃, curing time is that 3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. a modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material, it is characterized in that, its raw material comprises by weight: 100 parts of natural rubbers, maleic anhydride 8-10 part, coir 30-40 part, diatomite 15-20 part, nylon PA-665-10 part, calcinated argil 10-15 part, white carbon black 30-40 part, carbon black 20-30 part, attapulgite 20-40 part, zinc oxide 4-4.5 part, sulphur 1.5-2 part, vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide 1-2 part, bis(3-triethoxy silylpropyl)tetrasulfide 3-4 part, stearic acid 1.5-2 part, wherein the particle diameter of coir is 20-30mm,
In preparation process, by weight natural rubber is placed in to vacuum drying oven 24-30h, the temperature of vacuum drying oven is 50-55 ℃, then send in torque rheometer, temperature is controlled at 125-130 ℃, torque rheometer rotating speed is 50-55rpm, then add maleic anhydride to carry out mixing, mixing time is 5-7min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 60-70 ℃, be 30-34h time of drying, then the material obtaining is sent into the 5-7min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1-2min, temperature is increased to 50-60 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 3-5min, then add sulphur mixing 5-10min, thin-pass 5-6 time, slice, after placement 30-34h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 155-160 ℃, curing time is that 2-3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
2. modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material according to claim 1, it is characterized in that, its raw material comprises by weight: 100 parts of natural rubbers, maleic anhydride 8-9 part, coir 35-38 part, diatomite 16-18 part, nylon PA-666-8 part, calcinated argil 12-14 part, white carbon black 34-38 part, carbon black 25-28 part, attapulgite 22-24 part, zinc oxide 4-4.5 part, sulphur 1.8-2 part, vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide 1.5-1.8 part, bis(3-triethoxy silylpropyl)tetrasulfide 3.5-3.8 part, stearic acid 1.6-1.8 part, wherein the particle diameter of coir is 25-28mm.
3. modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material according to claim 1 and 2, it is characterized in that, its raw material comprises by weight: 100 parts of natural rubbers, 8.5 parts of maleic anhydrides, 37 parts of coirs, 17.5 parts, diatomite, nylon PA-666.5 part, 13.5 parts of calcinated argils, 36 parts of white carbon blacks, 26 parts of carbon blacks, 23 parts of attapulgites, 4.2 parts, zinc oxide, 1.95 parts, sulphur, 1.6 parts of vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamides, 3.6 parts of bis(3-triethoxy silylpropyl)tetrasulfides, 1.65 parts of stearic acid, wherein the particle diameter of coir is 25-28mm.
4. according to the modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material described in claim 1-3 any one, it is characterized in that, in preparation process, by weight natural rubber is placed in to vacuum drying oven 26-28h, the temperature of vacuum drying oven is 52-54 ℃, then send in torque rheometer, temperature is controlled at 126-128 ℃, torque rheometer rotating speed is 52-54rpm, then add maleic anhydride to carry out mixing, mixing time is 5-6min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 65-68 ℃, be 31-33h time of drying, then the material obtaining is sent into the 6-7min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1.5-2min, temperature is increased to 55-58 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 3-4min, then add sulphur mixing 6-8min, thin-pass 5-6 time, slice, after placement 31-33h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 156-158 ℃, curing time is that 2.5-3min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
5. according to the modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material described in claim 1-4 any one, it is characterized in that, in preparation process, by weight natural rubber is placed in to vacuum drying oven 27h, the temperature of vacuum drying oven is 53 ℃, then send in torque rheometer, temperature is controlled at 127 ℃, torque rheometer rotating speed is 53rpm, then add maleic anhydride to carry out mixing, mixing time is 5.5min, obtain modified natural rubber, modified natural rubber and coir are sent in vacuum drying oven dry to remove moisture, the temperature of vacuum drying oven is 67 ℃, be 32h time of drying, then the material obtaining is sent into the 6min that plasticates in Banbury mixer, then add bis(3-triethoxy silylpropyl)tetrasulfide mixing 1.8min, temperature is increased to 57 ℃ and adds N cyclohexyl 2 benzothiazole sulfenamide, white carbon black, carbon black and attapulgite, zinc oxide, stearic acid, diatomite, nylon PA-66, calcinated argil mixing 4min, then add sulphur mixing 7min, thin-pass 6 times, slice, after placement 32h, send on vulcanizing press and vulcanize along rolling direction, curing temperature is 157 ℃, curing time is that 2.5min obtains modification Exocarpium cocois (Cocos nucifera L) natural rubber compound cable sheath material.
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| CN104610597A (en) * | 2015-01-26 | 2015-05-13 | 安徽国华电缆集团有限公司 | Modified butadiene-acrylonitrile rubber sheath material for cable and preparation method for modified butadiene-acrylonitrile rubber sheath material |
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| CN105111656A (en) * | 2015-09-30 | 2015-12-02 | 淄博夸克医药技术有限公司 | Modified natural rubber composite material for cable insulation layer |
| CN105602020A (en) * | 2016-01-23 | 2016-05-25 | 安徽华成电缆有限公司 | Formula of material capable of improving tensile strength and softness of cable insulation layer |
| CN112940508A (en) * | 2021-02-25 | 2021-06-11 | 深圳市台钜电工有限公司 | High-frequency data transmission line sheath material and preparation method thereof |
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| CN105602020A (en) * | 2016-01-23 | 2016-05-25 | 安徽华成电缆有限公司 | Formula of material capable of improving tensile strength and softness of cable insulation layer |
| CN112940508A (en) * | 2021-02-25 | 2021-06-11 | 深圳市台钜电工有限公司 | High-frequency data transmission line sheath material and preparation method thereof |
| CN112940508B (en) * | 2021-02-25 | 2022-06-14 | 深圳市台钜电工有限公司 | High-frequency data transmission line sheath material and preparation method thereof |
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Application publication date: 20141210 |
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| RJ01 | Rejection of invention patent application after publication |