Wear-resistant and high-temperature-resistant synchronous belt and preparation method thereof

Abstract

The invention discloses a wear-resistant and high-temperature-resistant synchronous belt and a preparation method thereof. The wear-resistant and high-temperature-resistant synchronous belt comprises a synchronous belt framework and a synchronous belt rubber sheet, the synchronous belt rubber sheet is prepared from the following raw materials: a fluorosilicone thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, epoxidized natural rubber, molybdenum sulfide nanosheets, reinforced fibers, bis (1-vinyl imidazole-2-) ketone, 2-acrylamido-2-methylpropanesulfonic acid, 4, 4 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 The high-temperature-resistant rubber is prepared from 2, 6-hydroxy-2-cyanobenzothiazole, bis (3-aminophenyl) 3, 5-bis (trifluoromethyl) phenylphosphine oxide, a catalyst, a coupling agent, a vulcanizing agent, an anti-aging agent, a scorch retarder and a lubricating agent. The synchronous belt is good in mechanical property, sufficient in high-temperature resistance and cold resistance, good in wear resistance and excellent in aging resistance and flame retardance.

Description

Technical Field

[0001] The invention relates to the technical field of synchronous belt transmission and conveying, and in particular to a wear-resistant and high-temperature resistant synchronous belt and a preparation method thereof. Background Art

[0002] The synchronous belt is a new type of conveyor belt developed by combining the advantages of belt drive, chain drive and gear drive. It has the advantages of high transmission efficiency, accurate transmission ratio, wide transmission ratio range, smooth transmission, small force on the shaft, low noise, energy saving, etc. It is widely used in various types of mechanical transmission in various industries such as machine tools, textiles, light industry, tobacco, petroleum, communication cables, chemicals, mining, metallurgy, automobiles, food, instruments and so on.

[0003] The main rubber materials of synchronous belts at present are polyurethane rubber, chloroprene rubber and nitrile rubber, etc. The performance of these materials can only be used in a small temperature range, which limits the use of synchronous belts in high temperature environments. Other types of synchronous belts on the market also have more or less insufficient wear resistance and aging resistance, and their high temperature resistance, cold resistance, mechanical properties and flame retardancy still need to be further improved.

[0004] In order to solve the above problems, the Chinese invention patent with the authorization announcement number CN116239843B discloses a high-temperature resistant composite rubber material, its preparation method and the synchronous belt used therein. The high-temperature resistant composite rubber material includes the following raw materials: rubber matrix, paraffin oil, peroxide crosslinking agent, antioxidant, PEG-4000, carbon black, white carbon black and auxiliary crosslinking agent; wherein the rubber matrix includes a combination of EPDM rubber and POE; the antioxidant is selected from alkylated diphenylamine and 2-thiol benzimidazole zinc salt; its preparation method includes the following steps: EPDM rubber, POE, paraffin oil, carbon black, white carbon black, PEG-4000, antioxidant and auxiliary crosslinking agent are mixed and heated; then the peroxide crosslinking agent is added for secondary mixing to obtain the product. The application also discloses a synchronous belt, including a film made from the above materials. The application improves the heat resistance of the rubber material, and the obtained synchronous belt has better heat resistance and has a longer performance retention time at higher temperatures. However, its wear resistance, aging resistance and flame retardancy still need to be further improved.

[0005] It can be seen that the art still needs a wear-resistant and high-temperature resistant synchronous belt with good mechanical properties, sufficient high-temperature and cold-resistance, good wear resistance, excellent aging resistance and flame retardancy, and a preparation method thereof. Summary of the invention

[0006] The main purpose of the present invention is to provide a wear-resistant and high-temperature resistant synchronous belt with good mechanical properties, sufficient high-temperature and cold resistance, good wear resistance, excellent aging resistance and flame retardancy, and a preparation method thereof.

[0007] To achieve the above object, the present invention provides a wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 30-40 parts of a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 10-15 parts of an amino-containing hyperbranched liquid crystal polymer, 20-30 parts of methyl vinyl phenyl silicone rubber, 10-15 parts of epoxidized natural rubber, 1-3 parts of molybdenum sulfide nanosheets, parts, reinforcing fiber 5-10 parts, bis(1-vinyl imidazole-2-) ketone 2-4 parts, 2-acrylamido-2-methylpropanesulfonic acid 3-5 parts, 4,6-hydroxy-2-cyanobenzothiazole 1-2 parts, bis(3-aminophenyl)3,5-bis(trifluoromethyl)phenylphosphine oxide 1-3 parts, catalyst 0.8-1.2 parts, coupling agent 1-3 parts, vulcanizing agent 3-5 parts, antioxidant 1-2 parts, anti-scorch agent 0.5-0.8 parts, lubricant 1-2 parts.

[0008] Preferably, the lubricant is at least one of stearin, olein and trilinolein.

[0009] Preferably, the anti-scorch agent is anti-scorch agent CTP.

[0010] Preferably, the antioxidant is at least one of antioxidant NBC and antioxidant BLE.

[0011] Preferably, the vulcanizing agent is a mixture of dipentamethylenethiuram tetrasulfide, vulcanizing agent bis-25, benzoyl peroxide, and dicumyl peroxide in a mass ratio of (0.8-1.2):(0.5-0.8):1:0.8.

[0012] Preferably, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

[0013] Preferably, the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of (3-5):1.

[0014] Preferably, the reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1: (0.8-1.2).

[0015] Preferably, the average diameter of the reinforcing fibers is 3-9 μm and the length is 1-3 mm.

[0016] Preferably, the molybdenum sulfide nanosheets have a diameter of 200-500 nm and a thickness of 5-10 nm, and are provided by Xi'an Qiyue Biotechnology Co., Ltd.

[0017] Preferably, the methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120.

[0018] Preferably, the epoxidized natural rubber is at least one of epoxidized natural rubber ENR25 and epoxidized natural rubber ENR50.

[0019] Preferably, there is no special requirement for the source of the amino-containing hyperbranched liquid crystal polymer. In one embodiment of the present invention, the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization announcement number CN114437493B.

[0020] Preferably, there is no special requirement for the source of the fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure. In one embodiment of the present invention, the fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization publication number CN111154064B.

[0021] Preferably, the synchronous belt skeleton comprises a cloth sleeve and skeleton yarns wound around the cloth sleeve in a network structure, and the skeleton yarns are formed by blending and weaving aramid fibers.

[0022] Another object of the present invention is to provide a method for preparing the wear-resistant and high-temperature resistant synchronous belt, comprising the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, winding them on the cloth cover under a winding stress of 40-60N, and thus obtaining the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0023] Preferably, the aramid fiber in step S1 is HM type zylon® PBO fiber.

[0024] Preferably, the vulcanization in step S3 is specifically: vulcanization at a temperature of 150-160° C. and 10-15 MPa for 4-6 minutes, and then vulcanization at 170-180° C. and 8-13 MPa for 1-3 hours.

[0025] Preferably, the number of corona discharges in step S3 is 15-23 times.

[0026] Due to the application of the above technical solution, the present invention has the following beneficial effects: (1) The method for preparing the wear-resistant and high-temperature resistant synchronous belt disclosed in the present invention has a simple process, does not require special equipment, and does not require the modification of the existing production line. It has low capital investment, low energy consumption, high preparation efficiency and finished product qualification rate, is suitable for continuous large-scale production, and has high promotion and application value.

[0027] (2) The wear-resistant and high-temperature resistant synchronous belt disclosed in the present invention comprises a synchronous belt skeleton and a synchronous belt film wrapped around the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 30-40 parts of fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 10-15 parts of amino-containing hyperbranched liquid crystal polymer, 20-30 parts of methyl vinyl phenyl silicone rubber, 10-15 parts of epoxidized natural rubber, 1-3 parts of molybdenum sulfide nanosheets, 5-10 parts of reinforcing fiber, 2-4 parts of bis(1-vinyl imidazole-2-) ketone, 2 -3-5 parts of acrylamide-2-methylpropanesulfonic acid, 1-2 parts of 4,6-hydroxy-2-cyanobenzothiazole, 1-3 parts of bis(3-aminophenyl)3,5-bis(trifluoromethyl)phenylphosphine oxide, 0.8-1.2 parts of catalyst, 1-3 parts of coupling agent, 3-5 parts of vulcanizing agent, 1-2 parts of antioxidant, 0.5-0.8 parts of anti-scorch agent, 1-2 parts of lubricant; through the mutual cooperation and joint action of various raw materials, the manufactured synchronous belt has good mechanical properties, sufficient high temperature and cold resistance, good wear resistance, excellent aging resistance and flame retardancy.

[0028] (3) The wear-resistant and high-temperature resistant synchronous belt disclosed in the present invention has a synchronous belt film with a fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber and epoxidized natural rubber as the base material, which combines the advantages of these materials to give the synchronous belt excellent wear resistance, high temperature resistance, aging resistance and flame retardancy; the raw material containing epoxy groups can undergo an epoxy ring-opening reaction with the raw material containing amino groups or hydroxyl groups, the raw material containing sulfonic acid groups can undergo a chemical reaction with the raw material containing benzene rings under the action of a catalyst, and the raw materials containing unsaturated olefinic bonds can undergo a copolymerization reaction under the action of a vulcanizing agent to form an interpenetrating network structure; and polyurethane, hyperbranched liquid crystal polymer, phenyl silicone rubber, natural rubber, imidazolone, cyanobenzothiazole, and trifluoromethylphenylphosphine oxide structures are introduced at the same time. Under the multiple effects of electronic effect, steric effect and conjugation effect, these structures make the manufactured synchronous belt have better mechanical properties, better high temperature and cold resistance, better wear resistance, and better aging resistance and flame retardancy.

[0029] (4) The wear-resistant and high-temperature resistant synchronous belt disclosed in the present invention has added molybdenum sulfide nanosheets and reinforcing fibers, which work together to improve its mechanical properties, wear resistance and flame retardancy, increase the density of the internal structure of the material, and thus improve performance stability and extend its service life; the reinforcing fibers are waste HM type zylon® PBO fibers and boron fibers mixed in a mass ratio of 1: (0.8-1.2); using waste fibers and turning waste into treasure is not only beneficial to environmental protection, but also can save resources. DETAILED DESCRIPTION

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0031] Embodiment 1: A wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the outside of the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 30 parts of a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 10 parts of an amino-containing hyperbranched liquid crystal polymer, 20 parts of methyl vinyl phenyl silicone rubber, 10 parts of epoxidized natural rubber, 1 part of molybdenum sulfide nanosheets, 5 parts of reinforcing fiber, 2 parts of bis(1-vinylimidazole-2-)ketone, 3 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1 part of 4,6-hydroxy-2-cyanobenzothiazole, 1 part of bis(3-aminophenyl)3,5-di(trifluoromethyl)phenylphosphine oxide, 0.8 parts of a catalyst, 1 part of a coupling agent, 3 parts of a vulcanizing agent, 1 part of an antioxidant, 0.5 parts of a scorch inhibitor, and 1 part of a lubricant.

[0032] The lubricant is glyceryl stearate; the anti-scorching agent is anti-scorching agent CTP; the antioxidant is antioxidant NBC; the vulcanizing agent is a mixture of dipentamethylenethiuram tetrasulfide, vulcanizing agent bis 25, benzoyl peroxide, and diisopropylbenzene peroxide in a mass ratio of 0.8:0.5:1:0.8; the coupling agent is silane coupling agent KH550; and the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of 3:1.

[0033] The reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1:0.8; the average diameter of the reinforcing fiber is 3 μm and the length is 1 mm; the diameter of the molybdenum sulfide nanosheet is 200-500 nm and the thickness is 5-10 nm, and it is provided by Xi'an Qiyue Biotechnology Co., Ltd.; the methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120; the epoxidized natural rubber is epoxidized natural rubber ENR25; the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization announcement number CN114437493B; the fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization announcement number CN111154064B.

[0034] The synchronous belt skeleton comprises a cloth sleeve and skeleton yarns wound on the cloth sleeve in a network structure, and the skeleton yarns are formed by blending and weaving aramid fibers.

[0035] A method for preparing the wear-resistant and high-temperature resistant synchronous belt comprises the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, and winding them on the cloth cover under a winding stress of 40N, so as to obtain the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0036] The aramid fiber in step S1 is HM type zylon® PBO fiber; the vulcanization in step S3 is specifically: vulcanization at a temperature of 150° C. and 10 MPa for 4 minutes, and then vulcanization at 170° C. and 8 MPa for 1 hour; the number of corona discharges in step S3 is 15 times.

[0037] Embodiment 2: A wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the outside of the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 33 parts of a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 12 parts of an amino-containing hyperbranched liquid crystal polymer, 22 parts of methyl vinyl phenyl silicone rubber, 12 parts of epoxidized natural rubber, 1.5 parts of molybdenum sulfide nanosheets, 6 parts of reinforcing fiber, 2.5 parts of bis(1-vinylimidazole-2-)ketone, 3.5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1.2 parts of 4,6-hydroxy-2-cyanobenzothiazole, 1.5 parts of bis(3-aminophenyl)3,5-di(trifluoromethyl)phenylphosphine oxide, 0.9 parts of a catalyst, 1.5 parts of a coupling agent, 3.5 parts of a vulcanizing agent, 1.2 parts of an antioxidant, 0.6 parts of an anti-scorch agent, and 1.2 parts of a lubricant.

[0038] The lubricant is oleic acid glyceryl ester; the anti-scorch agent is anti-scorch agent CTP; the antioxidant is antioxidant BLE; the vulcanizing agent is a mixture of tetrapentamethylenethiuram tetrasulfide, vulcanizing agent bis 25, benzoyl peroxide, and dicumyl peroxide in a mass ratio of 0.9:0.6:1:0.8; the coupling agent is silane coupling agent KH560; the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of 3.5:1; the reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1:0.9; the average diameter of the reinforcing fiber is 5μm and the length is 1.5mm; the diameter of the molybdenum sulfide nanosheet is 200-500nm and the thickness is 5-10nm, which is provided by Xi'an Qiyue Biotechnology Co., Ltd.

[0039] The methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120; the epoxidized natural rubber is epoxidized natural rubber ENR50; the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization publication number CN114437493B; the fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the synchronous belt skeleton includes a cloth sleeve and a skeleton yarn wound on the cloth sleeve in a network structure, and the skeleton yarn is woven from a blend of aramid fibers.

[0040] A method for preparing the wear-resistant and high-temperature resistant synchronous belt comprises the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, and winding them on the cloth cover under a winding stress of 45N, so as to obtain the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0041] The aramid fiber in step S1 is HM type zylon® PBO fiber; the vulcanization in step S3 is specifically: vulcanization at a temperature of 153° C. and 12 MPa for 4.5 min, and then vulcanization at 173° C. and 9 MPa for 1.5 h; the number of corona discharges in step S3 is 18 times.

[0042] Embodiment 3: A wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the outside of the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 35 parts of fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 13 parts of amino-containing hyperbranched liquid crystal polymer, 25 parts of methyl vinyl phenyl silicone rubber, 13 parts of epoxidized natural rubber, 2 parts of molybdenum sulfide nanosheets, 7.5 parts of reinforcing fiber, 3 parts of bis(1-vinylimidazole-2-)ketone, 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1.5 parts of 4,6-hydroxy-2-cyanobenzothiazole, 2 parts of bis(3-aminophenyl)3,5-di(trifluoromethyl)phenylphosphine oxide, 1 part of catalyst, 2 parts of coupling agent, 4 parts of vulcanizing agent, 1.5 parts of antioxidant, 0.65 parts of anti-scorch agent, and 1.5 parts of lubricant.

[0043] The lubricant is trilinoleyl glycerol; the anti-scorching agent is anti-scorching agent CTP; the antioxidant is antioxidant NBC; the vulcanizing agent is a mixture of tetrapentamethylenethiuram tetrasulfide, vulcanizing agent bis 25, benzoyl peroxide, and dicumyl peroxide in a mass ratio of 1:0.65:1:0.8; the coupling agent is silane coupling agent KH570; the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of 4:1; the reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1:1; the average diameter of the reinforcing fiber is 6μm and the length is 2mm; the diameter of the molybdenum sulfide nanosheet is 200-500nm and the thickness is 5-10nm, which is provided by Xi'an Qiyue Biotechnology Co., Ltd.

[0044] The methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120; the epoxidized natural rubber is epoxidized natural rubber ENR25; the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization publication number CN114437493B; the fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone-type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the synchronous belt skeleton includes a cloth sleeve and a skeleton yarn wound on the cloth sleeve in a network structure, and the skeleton yarn is woven from a blend of aramid fibers.

[0045] A method for preparing the wear-resistant and high-temperature resistant synchronous belt comprises the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, winding them on the cloth cover under a winding stress of 50N, and obtaining the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0046] The aramid fiber in step S1 is HM type zylon® PBO fiber; the vulcanization in step S3 is specifically: vulcanization at a temperature of 155° C. and 13 MPa for 5 minutes, and then vulcanization at 175° C. and 10 MPa for 2 hours; the number of corona discharges in step S3 is 19 times.

[0047] Embodiment 4: A wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the outside of the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 38 parts of a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 14 parts of an amino-containing hyperbranched liquid crystal polymer, 28 parts of methyl vinyl phenyl silicone rubber, 14 parts of epoxidized natural rubber, 2.5 parts of molybdenum sulfide nanosheets, 9 parts of reinforcing fiber, 3.5 parts of bis(1-vinylimidazole-2-)ketone, 4.5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1.8 parts of 4,6-hydroxy-2-cyanobenzothiazole, 2.5 parts of bis(3-aminophenyl)3,5-di(trifluoromethyl)phenylphosphine oxide, 1.1 parts of a catalyst, 2.5 parts of a coupling agent, 4.5 parts of a vulcanizing agent, 1.8 parts of an antioxidant, 0.75 parts of an anti-scorch agent, and 1.8 parts of a lubricant.

[0048] The lubricant is a mixture of stearic acid glyceryl, oleic acid glyceryl, and trilinoleic acid glyceryl in a mass ratio of 1:1:2; the anti-scorching agent is anti-scorching agent CTP; the antioxidant is a mixture of antioxidant NBC and antioxidant BLE in a mass ratio of 3:5; the vulcanizing agent is a mixture of tetrasulfide dipentamethylenethiuram, vulcanizing agent bis 25, benzoyl peroxide, and dicumyl peroxide in a mass ratio of 1.1:0.75:1:0.8; the coupling agent is silane coupling agent KH550, silane coupling agent K H560 and silane coupling agent KH570 are mixed in a mass ratio of 1:3:5; the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of 4.5:1; the reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1:1.1; the average diameter of the reinforcing fiber is 8μm and the length is 2.5mm; the diameter of the molybdenum sulfide nanosheet is 200-500nm and the thickness is 5-10nm, which is provided by Xi'an Qiyue Biotechnology Co., Ltd.

[0049] The methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120; the epoxidized natural rubber is a mixture of epoxidized natural rubber ENR25 and epoxidized natural rubber ENR50 in a mass ratio of 1:2; the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization publication number CN114437493B; the fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone-type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the synchronous belt skeleton includes a cloth sleeve and a skeleton yarn wound on the cloth sleeve in a network structure, and the skeleton yarn is woven from a blend of aramid fibers.

[0050] A method for preparing the wear-resistant and high-temperature resistant synchronous belt comprises the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, and winding them on the cloth cover under a winding stress of 55N, so as to obtain the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0051] The aramid fiber in step S1 is HM type zylon® PBO fiber; the vulcanization in step S3 is specifically: vulcanization at a temperature of 158° C. and 14 MPa for 5.5 min, and then vulcanization at 178° C. and 12 MPa for 2.5 h; the number of corona discharges in step S3 is 22 times.

[0052] Embodiment 5: A wear-resistant and high-temperature resistant synchronous belt, comprising a synchronous belt skeleton and a synchronous belt film wrapped around the outside of the synchronous belt skeleton, wherein the synchronous belt film is made of the following raw materials in parts by weight: 40 parts of a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure, 15 parts of an amino-containing hyperbranched liquid crystal polymer, 30 parts of methyl vinyl phenyl silicone rubber, 15 parts of epoxidized natural rubber, 3 parts of molybdenum sulfide nanosheets, 10 parts of reinforcing fiber, 4 parts of bis(1-vinylimidazole-2-)ketone, 5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 2 parts of 4,6-hydroxy-2-cyanobenzothiazole, 3 parts of bis(3-aminophenyl)3,5-di(trifluoromethyl)phenylphosphine oxide, 1.2 parts of a catalyst, 3 parts of a coupling agent, 5 parts of a vulcanizing agent, 2 parts of an antioxidant, 0.8 parts of an anti-scorch agent, and 2 parts of a lubricant.

[0053] The lubricant is glyceryl stearate; the anti-scorch agent is anti-scorch agent CTP; the antioxidant is antioxidant NBC; the vulcanizing agent is a mixture of tetrapentamethylenethiuram tetrasulfide, vulcanizing agent bis 25, benzoyl peroxide, and dicumyl peroxide in a mass ratio of 1.2:0.8:1:0.8; the coupling agent is silane coupling agent KH560; the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of 5:1; the reinforcing fiber is a mixture of waste HM type zylon® PBO fiber and boron fiber in a mass ratio of 1:1.2; the average diameter of the reinforcing fiber is 9μm and the length is 3mm; the diameter of the molybdenum sulfide nanosheet is 200-500nm and the thickness is 5-10nm, which is provided by Xi'an Qiyue Biotechnology Co., Ltd.

[0054] The methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120; the epoxidized natural rubber is epoxidized natural rubber ENR25; the amino-containing hyperbranched liquid crystal polymer is prepared according to the preparation method of the hyperbranched liquid crystal polymer in Example 4 of the Chinese invention patent with authorization publication number CN114437493B; the fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure is prepared according to the preparation method of the fluorosilicone-type thermoplastic polyurethane elastomer in Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the synchronous belt skeleton includes a cloth sleeve and a skeleton yarn wound on the cloth sleeve in a network structure, and the skeleton yarn is woven from a blend of aramid fibers.

[0055] A method for preparing the wear-resistant and high-temperature resistant synchronous belt comprises the following steps: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, winding them on the cloth cover under a winding stress of 60N, and obtaining the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

[0056] The aramid fiber in step S1 is HM type zylon® PBO fiber; the vulcanization in step S3 is specifically: vulcanization at a temperature of 160° C. and 15 MPa for 6 minutes, and then vulcanization at 180° C. and 13 MPa for 3 hours; the number of corona discharges in step S3 is 23 times.

[0057] Comparative Example 1 A wear-resistant and high-temperature resistant synchronous belt is basically the same as Example 1, except that a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure is used instead of an amino-containing hyperbranched liquid crystal polymer, and 4,6-hydroxy-2-cyanobenzothiazole is not added.

[0058] Comparative Example 2 A wear-resistant and high-temperature resistant synchronous belt is basically the same as Example 1, except that a fluorosilicone-type thermoplastic polyurethane elastomer containing a benzene ring structure is used instead of methyl vinyl phenyl silicone rubber, and bis(3-aminophenyl) 3,5-bis(trifluoromethyl)phenylphosphine oxide is not added.

[0059] In order to further illustrate the beneficial technical effects of the wear-resistant and high-temperature resistant synchronous belts involved in each embodiment of the present invention, relevant performance tests were performed on the wear-resistant and high-temperature resistant synchronous belts involved in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1. The test method is as follows: For the aging resistance performance, the rubber material of the synchronous belt of each product is placed in hot air at 90°C for artificial accelerated aging for 200 hours, cooled to room temperature, tested and calculated the retention rate of the tensile strength of the rubber material of the synchronous belt at room temperature. The larger the retention rate, the better the aging resistance. The tensile strength test of the rubber material is carried out with reference to GB / T 528-2009, and the tensile rate is 100 mm / min. For the cold resistance performance, the rubber material of the synchronous belt of each product is placed at -35°C for 12 hours, restored to room temperature, tested and calculated the retention rate of the tensile strength of the rubber material of the synchronous belt at room temperature. The larger the retention rate, the better the cold resistance. The tensile strength test of the rubber material is carried out with reference to GB / T 528-2009, with a tensile rate of 100mm / min; Akron abrasion is measured according to GB / T1689-1998; high temperature resistance is achieved by placing the synchronous belt rubber of each product at 150℃ for 12 hours, then returning to room temperature, testing and calculating the retention rate of the tensile strength of the synchronous belt rubber at room temperature. The larger the retention rate, the better the high temperature resistance. The tensile strength test of the rubber is carried out with reference to GB / T 528-2009, with a tensile rate of 100mm / min; flame retardancy is tested according to UL-94.

[0060] As can be seen from Table 1, the wear-resistant and high-temperature resistant synchronous belt disclosed in the embodiment of the present invention has better heat aging resistance, cold resistance, high temperature resistance, flame retardancy and wear resistance than the comparative example product, and has better mechanical properties. The addition of amino-containing hyperbranched liquid crystal polymer, methylvinylphenyl silicone rubber, 4,6-hydroxy-2-cyanobenzothiazole, and bis(3-aminophenyl)3,5-bis(trifluoromethyl)phenylphosphine oxide is beneficial to improving the above properties.

[0061] Table 1

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A wear-resistant and high-temperature resistant synchronous belt, characterized in that: The invention comprises a synchronous belt skeleton and a synchronous belt film wrapped around the synchronous belt skeleton. The synchronous belt film is made of the following raw materials in parts by weight: 30-40 parts of a fluorosilicone type thermoplastic polyurethane elastomer containing a benzene ring structure, 10-15 parts of an amino-containing hyperbranched liquid crystal polymer, 20-30 parts of methyl vinyl phenyl silicone rubber, 10-15 parts of epoxidized natural rubber, 1-3 parts of molybdenum sulfide nanosheets, 5-10 parts of reinforcing fiber, 2-4 parts of bis(1-vinyl imidazole-2-) ketone, 3-5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1-2 parts of 4,6-hydroxy-2-cyanobenzothiazole, 1-3 parts of bis(3-aminophenyl) 3,5-di(trifluoromethyl)phenylphosphine oxide, 0.8-1.2 parts of a catalyst, 1-3 parts of a coupling agent, 3-5 parts of a vulcanizing agent, 1-2 parts of an antioxidant, 0.5-0.8 parts of a scorch retarder, and 1-2 parts of a lubricant.

2. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The lubricant is at least one of stearin, olein and trilinolein; and the anti-scorching agent is anti-scorching agent CTP.

3. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The antioxidant is at least one of antioxidant NBC and antioxidant BLE; the vulcanizing agent is a mixture formed by mixing dipentamethylenethiuram tetrasulfide, vulcanizing agent bis-25, benzoyl peroxide and dicumyl peroxide in a mass ratio of (0.8-1.2):(0.5-0.8):1:0.

8.

4. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560 and silane coupling agent KH570; the catalyst is a mixture of phosphorus pentoxide and polyphosphoric acid in a mass ratio of (3-5):

1.

5. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The reinforcing fibers are waste HM type zylon® PBO fibers and boron fibers mixed in a mass ratio of 1:(0.8-1.2); the average diameter of the reinforcing fibers is 3-9 μm and the length is 1-3 mm.

6. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The diameter of the molybdenum sulfide nanosheet is 200-500nm, and the thickness is 5-10nm; the methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA-120.

7. The wear-resistant and high-temperature resistant synchronous belt according to claim 1, characterized in that: The epoxidized natural rubber is at least one of epoxidized natural rubber ENR25 and epoxidized natural rubber ENR50; the synchronous belt skeleton comprises a cloth sleeve and a skeleton yarn wound on the cloth sleeve in a network structure, and the skeleton yarn is woven from a blend of aramid fibers.

8. A method for preparing the wear-resistant and high-temperature resistant synchronous belt according to any one of claims 1 to 7, characterized in that: The steps include: Step S1, preparation of synchronous belt skeleton: spinning aramid fiber through the processes of cleaning, combing, pre-winding, strip winding, combing, first winding, second winding and third winding in sequence to obtain skeleton yarn; applying a layer of mold release agent on the mold, then putting a corresponding cloth cover on the mold, and hanging it on the forming main machine; respectively leading 2 S-twisted skeleton yarns and 2 Z-twisted skeleton yarns from the tensioner, winding them on the cloth cover under a winding stress of 40-60N, and thus obtaining the synchronous belt skeleton; Step S2, preparation of synchronous belt film: putting fluorosilicone type thermoplastic polyurethane elastomer containing benzene ring structure, amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, and epoxidized natural rubber into an open mill for mixing, and alternately adding other raw materials, mixing evenly to obtain synchronous belt film; Step S3, corona discharge is performed on the synchronous belt skeleton, and then the synchronous belt film is attached to the synchronous belt skeleton, and then placed in a synchronous belt mold for compression molding and vulcanization, and then cooled to room temperature to obtain a wear-resistant and high-temperature resistant synchronous belt.

9. The method for preparing the wear-resistant and high-temperature resistant synchronous belt according to claim 8, characterized in that: The aramid fiber in step S1 is HM type zylon® PBO fiber.

10. The method for preparing the wear-resistant and high-temperature resistant synchronous belt according to claim 8, characterized in that: The vulcanization in step S3 is specifically: vulcanization at a temperature of 150-160° C. and 10-15 MPa for 4-6 minutes, and then vulcanization at 170-180° C. and 8-13 MPa for 1-3 hours; the number of corona discharges in step S3 is 15-23 times.

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