CN114437465B - Ethylene propylene diene monomer agricultural machinery belt with high self-adhesion and preparation process thereof - Google Patents

Ethylene propylene diene monomer agricultural machinery belt with high self-adhesion and preparation process thereof Download PDF

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CN114437465B
CN114437465B CN202210098373.1A CN202210098373A CN114437465B CN 114437465 B CN114437465 B CN 114437465B CN 202210098373 A CN202210098373 A CN 202210098373A CN 114437465 B CN114437465 B CN 114437465B
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ethylene propylene
diene monomer
propylene diene
rubber
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CN114437465A (en
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孙雯雯
宋方圆
姜垚男
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Rui Niu Co ltd
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    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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Abstract

The application relates to the technical field of agricultural machine belts, and particularly discloses a high self-adhesive ethylene propylene diene monomer agricultural machine belt and a preparation process thereof, wherein the high self-adhesive ethylene propylene diene monomer agricultural machine belt comprises the following raw materials: solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activator, modified fiber, vulcanizing agent, flame retardant and anti-aging agent; the agricultural machine belt obtained by the scheme has the advantages of high strength, high hardness, good wear resistance, no slip, excellent high and low temperature resistance, water resistance, acid and alkali corrosion resistance, aging resistance, flame retardance and the like. The application also provides a preparation process of the high self-adhesive ethylene propylene diene monomer agricultural machine belt, which comprises the steps of banburying solid ethylene propylene diene monomer and 1/2 carbon black to obtain a masterbatch, adding modified fibers, an activating agent, paraffin oil, a vulcanizing agent and an anti-aging agent into the masterbatch, banburying and mixing, and finally adding the rest carbon black, a flame retardant and a tackifier; the process has the advantages of simple molding operation, high preparation efficiency, low cost and good product quality.

Description

Ethylene propylene diene monomer agricultural machinery belt with high self-adhesion and preparation process thereof
Technical Field
The application relates to the technical field of agricultural machine belts, in particular to an ethylene propylene diene monomer agricultural machine belt with high self-adhesion and a preparation process thereof.
Background
The current country pays great attention to agricultural development, the agricultural mechanization level of China is continuously improved, and the development of the agricultural machinery industry brings huge market space for the market marketing of agricultural machinery with products. The agricultural machine belt, i.e. the agricultural machine adhesive tape, is a transmission belt specially used for agricultural operation, gardening, forest work and other equipment. Agricultural machinery is basically operated in open air, dusty, humid and dirty environments or in water, and is contacted with soil, fertilizer, pesticides, feces, rotted plants, water and the like for a long time, and is corroded by the materials and the environments for a long time; in the operation process, the agricultural machine belt which is a common part of the agricultural machine can even rub with the soil, the crop rhizome, the livestock fur and other materials to be seriously worn, and can bear larger dynamic load, impact effect and the like.
Ethylene propylene diene monomer is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, and because the main chain of the ethylene propylene diene monomer is composed of chemically stable saturated hydrocarbon and only contains unsaturated double bonds in side chains, the ethylene propylene diene monomer has excellent ozone resistance, heat resistance, weather resistance, aging resistance and other performances, and can be widely applied to the fields of automobile parts, waterproof materials for buildings, wire and cable sheaths, heat-resistant rubber tubes, adhesive tapes, automobile sealing parts and the like. In the related art, ethylene propylene diene monomer is generally selected as a base material for producing the agricultural machine belt, but the ethylene propylene diene monomer has poor self-adhesiveness, so that when the ethylene propylene diene monomer is adopted for producing the agricultural machine belt, the problems of difficult splicing and molding operation, easy detachment of a rubber joint and continuous use of a specific tool for repairing exist in the molding process, the production efficiency and the product quality stability of the agricultural machine belt are seriously affected, and the production cost is increased.
Disclosure of Invention
In order to improve the self-adhesion of ethylene propylene diene monomer and solve the problem that a joint is easy to separate, the application provides an ethylene propylene diene monomer agricultural machine belt with high self-adhesion and a preparation process thereof.
In a first aspect, the present application provides an ethylene propylene diene monomer agricultural machine belt with high self-adhesion, which adopts the following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 15-25 parts of tackifier, 38-55 parts of carbon black, 15-25 parts of paraffin oil, 8-16 parts of activator, 7-16 parts of modified fiber, 1-3 parts of vulcanizing agent, 2-5 parts of flame retardant and 2-4 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, phenolic resin tackifier and ammoniated sodium silicate in a mass ratio of 5-10:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:3-10.
Preferably, the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 18-22 parts of tackifier, 42-50 parts of carbon black, 18-22 parts of paraffin oil, 10-14 parts of activator, 9-14 parts of modified fiber, 1.5-2.5 parts of vulcanizing agent, 3-4 parts of flame retardant and 2.5-3.5 parts of anti-aging agent.
Preferably, the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent.
By adopting the technical scheme, the raw material selection and the raw material proportion are controlled, the solid ethylene propylene diene monomer is selected as the main material for producing the agricultural machine belt, the self-adhesion of the solid ethylene propylene diene monomer is improved by using the tackifier, and the performances of strength, high temperature resistance, corrosion resistance, friction resistance and the like of the agricultural machine belt are enhanced by using the modified fiber; according to the preparation method, the liquid ethylene propylene diene monomer, the phenolic resin tackifier and the ammoniated sodium silicate are compounded to be used as the tackifier, wherein the liquid ethylene propylene diene monomer serves as a low molecular weight component, so that the initial adhesion of rubber can be improved, the Mooney viscosity of the solid ethylene propylene diene monomer can be effectively reduced by adding the liquid ethylene propylene diene monomer, the mixing processing is facilitated, the solid sodium silicate is treated by adding 23% ammonia water, and the surface potential energy and solvation capacity of the sodium silicate are changed to obtain the ammoniated sodium silicate; the liquid ethylene propylene diene monomer, the phenolic resin tackifier and the ammoniated sodium silicate are compounded, under the combined action of the three materials, the self-adhesion of the ethylene propylene diene monomer is greatly improved, the production and use requirements are met, and meanwhile, the dosage of the phenolic resin tackifier is small; the application adopts low-cost polyester fiber and aramid fiber and uses as agricultural machine belt reinforcing fiber, through controlling the mass ratio of the aramid fiber to the polyester fiber to be 1:3-10, the production cost is effectively reduced when the excellent performance of agricultural machine belt products is ensured, when the using amount of the aramid fiber is increased and exceeds the range value, the dispersibility of the aramid fiber in rubber is poor, the Mooney viscosity of the rubber material is increased along with the increase of the using amount of the aramid fiber, the Payne effect of the rubber material is enhanced, and the structural damage of filler-rubber material is obvious.
Preferably, the phenolic tackifier is a tackifier JP769.
By adopting the technical scheme, the tackifier JP769 is phenolic resin with specific composition, and the addition of the phenolic resin can improve the self-adhesion of the sizing material, so that the formed sizing material can be stably connected.
Preferably, the modified fiber is made by the following process:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4-5:1-5:12-18:3-7:1-2;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:3-10:20-30, heating to 65-85 ℃, controlling the rotating speed of a rotating disc to be 100-300r/min and the central pressure to be 20-100N, and grinding and mixing for 1-2h to obtain grinding liquid;
(3) And (3) carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 1-3min, and spray drying after the treatment is finished to obtain the required modified fiber.
By adopting the technical scheme, the aramid fiber and the polyester fiber are compounded to be used as sizing material reinforcing fibers, the compound fibers are ground and modified by preparing suspension, and finally corona treatment is carried out, so that the surface roughness and the surface energy of the compound fibers are effectively increased; the N-methyl pyrrolidone and the polyvinyl alcohol are adopted to promote the dispersion uniformity of the compound fiber in the sizing material and increase the interface bonding strength, and the addition of the calcium stearate emulsion and the nano silicon dioxide can obviously improve the fluidity, the hydrophobicity and the toughness of the compound fiber.
Preferably, the length of the aramid fiber is 1mm, and the length of the polyester fiber is 1-6mm.
Through adopting above-mentioned technical scheme, in the technical scheme of this application, the applicant found that 1mm, 3mm, 6mm aramid fiber of the same portion, the tensile properties and the right angle tear strength of the fibre orientation direction of 1mm aramid fiber are the highest, and when aramid fiber's length is 1mm, modified fiber more easily distributes evenly in the sizing material, and the mixing dispersibility is best, and the quality stability of the agricultural machinery area product of obtaining is good, and the sizing material that fills through this application modified fiber has good processability and mechanical properties, and its surface is leveled, and physical properties is stable, can form the feel on the surface after abrasive machining, improves the wet-skid resistance of agricultural machinery area product greatly.
Preferably, the activator is one or any combination of stearic acid, zinc oxide, magnesium oxide or talcum powder.
By adopting the technical scheme, the vulcanizing system can be activated by adding the activating agent, the vulcanizing time is shortened, and the crosslinking density and the ageing resistance of the obtained vulcanized rubber are further improved; stearic acid has softening, plasticizing and other functions besides vulcanizing activity; the zinc oxide has the functions of strengthening and compatibilizing besides the vulcanizing activity; the magnesium oxide has the functions of strengthening and flame retarding besides the vulcanizing activity; besides the vulcanizing activity, talcum powder also has lubricating and fireproof effects.
Preferably, the flame retardant is a compound of antimony oxide and zinc borate in a mass ratio of 1-3:4-7.
By adopting the technical scheme, the antimony oxide and the zinc borate are compounded to be used as the flame retardant, so that the flame retardant property can be effectively improved, the generation of smoke during combustion is reduced, and the mechanical property and the corrosion resistance of agricultural machinery belt products can be improved.
Preferably, the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 1-3:2-7:1.
By adopting the technical scheme, the tetramethylthiuram disulfide, the sulfur and the dicumyl peroxide are compounded to be used as the vulcanizing agent, so that the vulcanizing effect can be ensured, the vulcanizing time is shortened, the vulcanizing temperature is reduced, and the consumption of the vulcanizing agent is reduced under the condition that the performance of the obtained agricultural machine belt product is ensured.
Preferably, the anti-aging agent is one or any combination of an anti-aging agent DDA, an anti-aging agent RD or an anti-aging agent NBC.
By adopting the technical scheme, the anti-aging agent has excellent thermo-oxidative aging resistance, vulcanization reduction resistance and ozone aging resistance, and the addition of the anti-aging agent can effectively delay the aging of rubber, so that the service life of agricultural machinery belt products is prolonged.
In a second aspect, the application provides a preparation process of an ethylene propylene diene monomer agricultural machine belt with high self-adhesion, which adopts the following technical scheme:
The preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion specifically comprises the following preparation steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 30-50r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 1-3h to obtain a master batch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 1-5min, adding the rest carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 110-130 ℃, and rubber discharging is completed to obtain the rubber compound;
s4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
By adopting the technical scheme, the solid ethylene propylene diene monomer and 1/2 carbon black are banburying to obtain the masterbatch, modified fibers, an activating agent, paraffin oil, a vulcanizing agent and an anti-aging agent are firstly added into the masterbatch for banburying and mixing, and finally, the rest carbon black, a flame retardant and a tackifier are added; the modified compound fiber has good dispersibility and high interface bonding strength, can effectively improve the strength, wear resistance, water resistance, corrosion resistance and other performances of the agricultural machinery belt product, and improves the wet skid capacity of the agricultural machinery belt product; and finally, the tackifier is added, the loose rubber blocks are filled and matched by the tackifier, the processability of the rubber compound is improved, the splice forming operation of the obtained rubber compound is simple, the rubber compound joint is not easy to separate, the production efficiency is high, the production cost is low, and the obtained agricultural machine belt product has stable quality and can be widely applied.
In summary, the present application has the following beneficial effects:
the method has the advantages that the formula is scientific, the proportion is reasonable, the solid ethylene propylene diene monomer is adopted as the main raw material for producing the agricultural belt, the problem of poor self-adhesiveness of the solid ethylene propylene diene monomer is solved by adding the compound tackifier, the comprehensive performance of the agricultural belt product obtained by adding the carbon black and the modified fiber reinforcement is guaranteed, and the production processing performance of the agricultural belt product is guaranteed by adding the residual raw material activator, the vulcanizing agent and the like; the agricultural machine belt prepared by the method is simple in preparation method, mild in preparation condition, high in preparation efficiency, low in preparation cost, good in product quality and stable in product performance, and can be widely used as a transmission belt for agricultural operation, gardening, forest industry and other equipment.
Detailed Description
The present application is described in further detail below with reference to examples.
Example 1
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 15 parts of tackifier, 38 parts of carbon black, 15 parts of paraffin oil, 8 parts of activating agent, 7 parts of modified fiber, 1 part of vulcanizing agent, 2 parts of flame retardant and 2 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 5:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:3; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4:1:12:3:1;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:3:20, heating to 65 ℃, controlling the rotating speed of a rotating disc to be 100r/min, and grinding and mixing for 1h to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 1min, and spray drying after the treatment is finished to obtain the required modified fiber;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 1mm;
wherein the activating agent is stearic acid;
wherein the flame retardant is a compound of antimony oxide and zinc borate in a mass ratio of 1:4;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 1:2:1;
wherein the anti-aging agent is anti-aging agent DDA.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 30r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 1h to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 1min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 110 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Example 2
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 18 parts of tackifier, 42 parts of carbon black, 18 parts of paraffin oil, 10 parts of activator, 9 parts of modified fiber, 1.5 parts of vulcanizing agent, 3 parts of flame retardant and 2.5 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate with a mass ratio of 6:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:4; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4.2:2:14:4:1.2;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:4:22, heating to 70 ℃, controlling the rotating speed of a rotating disc to be 150r/min, and grinding and mixing for 1.2h under the central pressure of 40N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 1.5min, and spray drying after the treatment is finished to obtain the required modified fiber;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 2mm;
wherein the activator is zinc oxide;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 1.5:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 1.5:3:1;
wherein the anti-aging agent is an anti-aging agent RD.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
S1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 35r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, mixing for 2min, adding the residual carbon black, the flame retardant and the tackifier, mixing until the materials are completely and uniformly mixed, and performing rubber discharging treatment, wherein the rubber discharging temperature is 115 ℃, and rubber discharging is completed to obtain the rubber compound;
s4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Example 3
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
An ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 8:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4.5:3:15:5:1.5;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:7:25, heating to 75 ℃, controlling the rotating speed of a rotating disc to be 200r/min, and grinding and mixing for 1.5h under the central pressure of 60N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 2min, and spray drying to obtain the required modified fiber after the treatment is completed;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Example 4
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 22 parts of tackifier, 50 parts of carbon black, 22 parts of paraffin oil, 14 parts of activating agent, 14 parts of modified fiber, 2.5 parts of vulcanizing agent, 4 parts of flame retardant and 3.5 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 9:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:8; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4.8:4:16:6:1.8;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:8:28, heating to 80 ℃, controlling the rotating speed of a rotating disc to be 250r/min, and grinding and mixing for 1.8h under the central pressure of 80N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 2.5min, and spray drying after the treatment is finished to obtain the required modified fiber;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 5mm;
wherein the activator is magnesium oxide;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2.5:6;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2.5:6:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent NBC with the mass ratio of 2:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
S1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 45r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2.5h to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, mixing for 4min, adding the residual carbon black, the flame retardant and the tackifier, mixing until the materials are completely and uniformly mixed, and performing rubber discharging treatment, wherein the rubber discharging temperature is 125 ℃, and rubber discharging is completed to obtain the rubber compound;
s4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Example 5
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 25 parts of tackifier, 55 parts of carbon black, 25 parts of paraffin oil, 16 parts of activator, 16 parts of modified fiber, 3 parts of vulcanizing agent, 5 parts of flame retardant and 4 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 10:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:10; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 5:5:18:7:2;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:10:30, heating to 85 ℃, controlling the rotating speed of a rotating disc to 300r/min, grinding and mixing for 2 hours under the central pressure of 100N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 3min, and spray drying after the treatment is finished to obtain the required modified fiber;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 6mm;
wherein the activating agent is talcum powder;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 3:7;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 3:7:1;
wherein the anti-aging agent is anti-aging agent NBC.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 50r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 3 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 5min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 130 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Examples test sample performance test:
the test samples obtained by calendering the film obtained in step S4 of examples 1 to 5 by a calender were subjected to performance test according to the test standards of ASTM D2240 Shore hardness test method for rubber, GB/T 529-2008 determination of tear strength of vulcanized rubber or thermoplastic rubber, GB/T 528-2009 determination of tensile stress strain properties of vulcanized rubber or thermoplastic rubber, GB/T1689-2014 determination of abrasion resistance properties of vulcanized rubber, and the results are shown in Table 1 below:
table 1 examples 1-5 test sample performance test results
Detecting items Example 1 Example 2 Example 3 Example 4 Example 5
Hardness (Shore A) 84 86 89 86 85
Warp tear Strength/KN/m 73.9 76.5 79.3 77.6 75.8
Tensile strength in warp direction/Mpa 22.3 24.4 25.7 24.8 23.6
Elongation at break/% 521 537 558 543 535
10% stress/Mpa 14.5 15.6 17.1 16.3 15.2
Acle abrasion volume/V 1.305 1.231 1.154 1.203 1.279
Note that: the warp properties were tested in the direction of the fibers.
The ethylene propylene diene monomer agricultural machine belt with high self-viscosity prepared in the examples 1-5 is subjected to fatigue test, and the belt is basically intact under the conditions of 120 ℃ temperature, 4700r/min driving wheel rotation speed and 9kW power by using a three-wheel tester.
Comparative example 1
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber and ammoniated sodium silicate with a mass ratio of 8:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4.5:3:15:5:1.5;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:7:25, heating to 75 ℃, controlling the rotating speed of a rotating disc to be 200r/min, and grinding and mixing for 1.5h under the central pressure of 60N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 2min, and spray drying to obtain the required modified fiber after the treatment is completed;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
s4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
S5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Comparative example 2
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
wherein the tackifier is a mixture of liquid ethylene propylene diene monomer rubber and a tackifier JP769 in a mass ratio of 8:1;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7; the preparation method comprises the following steps:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4.5:3:15:5:1.5;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:7:25, heating to 75 ℃, controlling the rotating speed of a rotating disc to be 200r/min, and grinding and mixing for 1.5h under the central pressure of 60N to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2), wherein the corona treatment time is 2min, and spray drying to obtain the required modified fiber after the treatment is completed;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Comparative example 3
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 8:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and nylon 66 fiber with the mass ratio of 1:7;
The length of the aramid fiber is 1mm, and the length of the nylon 66 fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Comparative example 4
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 8:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7;
The length of the aramid fiber is 1mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Comparative example 5
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 8:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7;
The length of the aramid fiber is 3mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
Comparative example 6
The application provides a high self-adhesive ethylene propylene diene monomer agricultural machinery area, adopts following technical scheme:
an ethylene propylene diene monomer agricultural machinery belt with high self-adhesive property comprises the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, tackifier JP769 and ammoniated sodium silicate in a mass ratio of 8:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
wherein the modified fiber comprises aramid fiber and polyester fiber with the mass ratio of 1:7;
The length of the aramid fiber is 6mm, and the length of the polyester fiber is 4mm;
wherein the activating agent is the combination of stearic acid and magnesium oxide in a mass ratio of 1:1;
wherein the flame retardant is a compound of antimony oxide and zinc borate with the mass ratio of 2:5;
wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 2:4:1;
wherein the anti-aging agent is the combination of the anti-aging agent DDA and the anti-aging agent RD with the mass ratio of 3:1.
The application also provides a preparation process of the ethylene propylene diene monomer agricultural machinery belt with high self-adhesion, which specifically comprises the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
s2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to 40r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 2 hours to obtain a masterbatch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 3min, adding the residual carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 120 ℃, and rubber discharging is completed to obtain the rubber compound;
S4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
The properties of the test sample films prepared in comparative examples 1 to 6 were examined in the same manner as in examples 1 to 5, and the results are shown in Table 2:
table 2 comparative examples 1-6 test sample performance test results
Detecting items Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6
Hardness (Shore A) 81 84 83 82 77 73
Warp tear Strength/KN/m 68.5 71.5 72.3 72.0 68.9 64.3
Tensile strength in warp direction/Mpa 20.4 22.1 23.1 22.6 20.4 17.8
Elongation at break/% 273 333 397 425 388 335
10% stress/Mpa 12.6 16.7 12.9 14.5 13.4 12.8
Acle abrasion volume/V 1.350 1.167 1.176 1.253 1.392 1.613
Note that: the warp properties were tested in the direction of the fibers.
And (3) carrying out fatigue test on the ethylene propylene diene monomer agricultural machine belt with high self-viscosity prepared in the comparative examples 1-6, and using a three-wheel tester to test for 700-900 hours under the conditions that the temperature is 120 ℃, the driving wheel rotating speed is 4700r/min and the power is 9kW, wherein the belt starts to be damaged.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (8)

1. The ethylene propylene diene monomer agricultural machinery belt with high self-adhesion is characterized by comprising the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 15-25 parts of tackifier, 38-55 parts of carbon black, 15-25 parts of paraffin oil, 8-16 parts of activator, 7-16 parts of modified fiber, 1-3 parts of vulcanizing agent, 2-5 parts of flame retardant and 2-4 parts of anti-aging agent;
the tackifier is a mixture of liquid ethylene propylene diene monomer rubber, phenolic resin tackifier and ammoniated sodium silicate in a mass ratio of 5-10:1:1, wherein the ammoniated sodium silicate is obtained by ammoniating solid sodium silicate with 23% ammonia water;
the modified fiber is aramid fiber and polyester fiber with the mass ratio of 1:3-10;
the modified fiber is prepared by the following method:
(1) Adding water into N-methylpyrrolidone and polyvinyl alcohol, stirring and mixing, adding calcium stearate emulsion with the solid content of 50% and nano silicon dioxide, and stirring and dispersing uniformly to obtain a suspension, wherein the mass ratio of the N-methylpyrrolidone to the polyvinyl alcohol to the water to the calcium stearate emulsion to the nano silicon dioxide is 4-5:1-5:12-18:3-7:1-2;
(2) Adding aramid fiber and polyester fiber into the suspension in the step (1) according to the mass ratio of 1:3-10:20-30, heating to 65-85 ℃, controlling the rotating speed of a rotating disc to be 100-300r/min and the central pressure to be 20-100N, and grinding and mixing for 1-2h to obtain grinding liquid;
(3) Carrying out corona treatment on the grinding liquid in the step (2) for 1-3min, and spray drying after the treatment is finished to obtain the required modified fiber;
the length of the aramid fiber is 1mm, and the length of the polyester fiber is 1-6mm.
2. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, which is characterized by comprising the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 18-22 parts of tackifier, 42-50 parts of carbon black, 18-22 parts of paraffin oil, 10-14 parts of activator, 9-14 parts of modified fiber, 1.5-2.5 parts of vulcanizing agent, 3-4 parts of flame retardant and 2.5-3.5 parts of anti-aging agent.
3. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, which is characterized by comprising the following raw materials in parts by weight: 100 parts of solid ethylene propylene diene monomer, 20 parts of tackifier, 46 parts of carbon black, 20 parts of paraffin oil, 12 parts of activator, 11 parts of modified fiber, 2 parts of vulcanizing agent, 3.5 parts of flame retardant and 3 parts of anti-aging agent.
4. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, wherein the activator is one or any combination of stearic acid, zinc oxide, magnesium oxide or talcum powder.
5. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, wherein the flame retardant is a compound of antimony oxide and zinc borate in a mass ratio of 1-3:4-7.
6. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, wherein the vulcanizing agent is a composition of tetramethylthiuram disulfide, sulfur and dicumyl peroxide in a mass ratio of 1-3:2-7:1.
7. The high self-adhesive ethylene propylene diene monomer agricultural machinery belt of claim 1, wherein the anti-aging agent is one or any combination of anti-aging agent DDA, anti-aging agent RD or anti-aging agent NBC.
8. The process for preparing an ethylene propylene diene monomer agricultural machinery belt with high self-adhesiveness according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, weighing raw materials of solid ethylene propylene diene monomer, tackifier, carbon black, paraffin oil, activating agent, modified fiber, vulcanizing agent, flame retardant and anti-aging agent according to parts by weight for later use;
S2, adding the solid ethylene propylene diene monomer and 1/2 carbon black into an internal mixer, setting the rotation speed of the internal mixer to be 30-50r/min, carrying out internal mixing until the materials are uniformly mixed, and cooling for 1-3h to obtain a master batch;
s3, sequentially adding the modified fiber, the activating agent, the paraffin oil, the vulcanizing agent and the anti-aging agent into the masterbatch in the step S2, banburying and mixing for 1-5min, adding the rest carbon black, the flame retardant and the tackifier, banburying until the mixture is completely and uniformly mixed, and then performing rubber discharging treatment, wherein the rubber discharging temperature is 110-130 ℃, and rubber discharging is completed to obtain the rubber compound;
s4, calendaring the mixed rubber in the step S3 through a calendaring machine to obtain a rubber sheet with required specification, winding a plurality of layers of rubber sheets to form a base rubber layer, arranging an adhesive rubber sheet on the base rubber layer to form an adhesive layer, spirally winding an aramid fiber rope outside the adhesive rubber sheet, and finally arranging the fiber rubber sheet outside the aramid fiber rope to form a buffer layer, so that a belt blank is obtained;
s5, cutting and grinding the strip blank in the step S4 according to the required size, and finally vulcanizing and forming by a vulcanizing machine.
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