High-temperature-resistant heat-sealing adhesive tape and preparation method thereof

Abstract

The invention relates to the technical field of adhesives, and particularly discloses a high-temperature-resistant heat-sealing adhesive tape and a preparation method thereof. The high-temperature-resistant heat-sealing adhesive tape is prepared from the following raw materials in parts by mass, the material is prepared from, by mass, 15-25 parts of hydrogenated styrene-butadiene-styrene segmented copolymer, 25-35 parts of maleic anhydride grafted EVA, 10-20 parts of hydrogenated terpene resin, 3-6 parts of modified inorganic filler, 3-5 parts of epoxidized soybean oil, 0.6-1 part of titanate coupling agent, 0.3-0.6 part of antioxidant, 1.5-2.5 parts of composite cross-linking agent and 3-6 parts of repairing agent. The high-temperature-resistant heat-sealing adhesive tape prepared by the invention has relatively good sealing performance, thermal stability and mechanical property.

Description

Technical Field

[0001] This application relates to the technical field of adhesives, and particularly to a high-temperature resistant heat-sealing strip and its preparation method. Background Art

[0002] Heat-sealing strips are mainly used at the seams of clothing, especially in products that require high sealing performance, such as protective clothing, windbreakers, diving suits, etc. These clothes usually require seamless and pinhole-free seams to prevent the penetration of harmful substances such as germs and moisture. Under the action of a heat-sealing machine, traditional heat-sealing strips can closely adhere to the seams of clothing to achieve this protective purpose.

[0003] However, in actual use scenarios, clothing is frequently subjected to various complex external forces. Body movements or temperature changes during daily activities can gradually damage the internal structure of the heat-sealing strip, facing the risk of fracture or debonding. Especially in high-temperature environments, the heat resistance defects of traditional strips are fully exposed. When the temperature rises, the key components in the strip soften due to insufficient heat resistance, resulting in a rapid decrease in viscosity until the viscosity is completely lost, ultimately leading to the failure of the sealing function. This not only greatly weakens the sealing performance of the clothing, reducing the protective performance significantly, but also significantly shortens the service life of the clothing, making it difficult to meet the wearing needs of consumers in harsh environments.

[0004] The patent application document with the publication number CN112210329A discloses a heat-sealing adhesive, which comprises a styrene-isoprene-styrene polymer, an ethylene-vinyl acetate copolymer, a tackifying resin, a rosin-modified resin, a terpene phenolic resin, a cross-linking agent, a coupling agent, and an antioxidant.

[0005] In the styrene-isoprene-styrene polymer used in this patent application document, the main chain of the isoprene unit contains carbon-carbon double bonds. The existence of the double bonds makes the rotational freedom of the molecular chain relatively large, and the temperature resistance performance is relatively poor. In the actual application scenario of the heat-sealing strip, the hot pressing process is often accompanied by a high-temperature environment. During hot pressing, due to the deterioration of the performance of the styrene-isoprene-styrene polymer, defects will appear inside the adhesive film and deformation will occur outside. This will not only damage the external structure of the heat-sealing strip, but also cause a significant decrease in the adhesion between it and the material to be sealed, thus leading to the problem of debonding in subsequent use. Summary of the Invention

[0006] In order to improve the sealing performance and thermal stability of the heat-sealing strip, this application provides a high-temperature resistant heat-sealing strip and its preparation method.

[0007] In the first aspect, this application provides a high-temperature resistant heat-sealing strip, adopting the following technical solution: A high-temperature resistant heat-sealing rubber strip is made of raw materials in the following mass parts: 15-25 mass parts of hydrogenated styrene-butadiene-styrene block copolymer, 25-35 mass parts of maleic anhydride grafted EVA, 10-20 mass parts of hydrogenated terpene resin, 3-6 mass parts of modified inorganic filler, 3-5 mass parts of epoxidized soybean oil, 0.6-1 mass part of titanate coupling agent, 0.3-0.6 mass part of antioxidant, 1.5-2.5 mass parts of composite crosslinking agent, and 3-6 mass parts of repair agent; The composite crosslinking agent includes bis(tert-butylperoxy)diisopropylbenzene and vinyltrimethoxysilane; The repair agent includes 1,4-divinylbenzene, benzoquinone and borate ester.

[0008] In this technical solution, the compounding of hydrogenated styrene-butadiene-styrene block copolymer (hereinafter referred to as SEBS) and maleic anhydride grafted EVA (hereinafter referred to as MAH-g-EVA) not only has high compatibility, but also endows the heat-sealing rubber strip with basic heat resistance and flexibility. The hydrogenated terpene resin forms physical entanglement with SEBS or MAH-g-EVA through its rigid polycyclic structure, which can significantly enhance the bonding strength and cohesion strength between SEBS and MAH-g-EVA, ensure that the heat-sealing rubber strip can be firmly bonded to the material to be sealed during the heat-sealing process, is not easy to delaminate, and guarantees the tightness and durability of the seal.

[0009] On this basis, the surface-modified inorganic filler is uniformly dispersed inside the matrix and has good interfacial bonding with the matrix. The presence of additives such as titanate coupling agent further enhances this interfacial bonding force. When the material is subjected to external force, the stress can be transmitted to the inorganic filler through the interface, and then the stress is dispersed throughout the material. This interfacial transmission effect effectively avoids the formation of concentrated stress peaks inside the matrix, enables the stress to be evenly distributed within a larger range, and improves the overall ability of the material to resist external forces.

[0010] After adding the repair agent and the composite crosslinking agent, due to the action of dynamic covalent bonds of the repair agent, when local defects occur in the rubber strip due to overheating, these dynamic covalent bonds will break moderately. The active groups generated by the breakage can interact with the molecular chains at the defective part of the rubber strip, and repair the defective part by means of recombination, connection, etc. In this way, the repair agent can maintain the activity of the molecular chains of the rubber strip. Even in a high-temperature environment, the molecular chains will not undergo irreversible structural damage due to overheating, such as severe performance-affecting situations like excessive crosslinking and main chain breakage. This enables the rubber strip to always maintain good sealing performance, mechanical properties, etc. in various high-temperature heat-sealing scenarios, ensuring the quality and service life of the heat-sealed products. At the same time, when subjected to external forces, the dynamic covalent bonds can dissipate energy by breaking and reforming, so that the rubber strip can withstand large degrees of bending, stretching and other deformations without breaking, showing good mechanical stability. The composite crosslinking agent enables polymer molecular chains (such as SEBS and MAH-g-EVA) to form a three-dimensional network structure, improving the thermal stability of the heat-sealing rubber strip, strengthening the interfacial bonding force between the modified inorganic filler and the matrix, effectively transmitting stress, and avoiding performance degradation caused by interfacial debonding.

[0011] Preferably, the borate ester is any one of pentaerythritol borate and tributyl borate.

[0012] Preferably, the antioxidant includes antioxidant 3114 and triphenyl phosphite, and the mass ratio of antioxidant 3114 to triphenyl phosphite is (1.5 - 2.5):(0.5 - 1.5).

[0013] Preferably, the mass ratio of 1,4-divinylbenzene, benzoquinone and pentaerythritol borate is (4 - 6):(2 - 4):(1 - 3).

[0014] Preferably, the composite crosslinking agent further includes 0.2 - 0.5 parts by mass of zinc acrylate.

[0015] Preferably, the preparation method of the modified inorganic filler includes the following steps: Mix the inorganic filler and the aluminate coupling agent evenly, then immerse them in the silicone rubber solution for 2 - 4 h, let it stand, separate the solid and liquid, dry, add the fatty alcohol polyoxyethylene ether solution and mix evenly, separate the solid and liquid, dry, and sieve to obtain the modified inorganic filler; The mass fraction of the silicone rubber solution is 10% - 20%; the mass fraction of the fatty alcohol polyoxyethylene ether solution is 5% - 10%; the mass ratio of the inorganic filler, the aluminate coupling agent, the silicone rubber solution and the fatty alcohol polyoxyethylene ether solution is 1:(0.01 - 0.02):(1 - 1.5):(0.3 - 0.5); the inorganic filler is at least one of talc powder and wollastonite.

[0016] Preferably, the aluminate coupling agent is any one of aluminate coupling agent DL-411 and aluminate coupling agent DL-42.

[0017] Preferably, the silicone rubber solution includes methyl vinyl silicone rubber and toluene.

[0018] Preferably, the fatty alcohol polyoxyethylene ether solution includes AEO-9 and water.

[0019] In this technical solution, the inorganic filler is first surface-treated with an aluminate coupling agent, which not only enables the inorganic filler to be more evenly dispersed in the matrix composed of SEBS, MAH-g-EVA, etc., but also improves the compatibility and bonding strength between the inorganic filler and the matrix. Then it is impregnated in the silicone rubber solution, which not only improves the surface properties of the inorganic filler but also endows the inorganic filler with a certain flexibility, and the silicone rubber can better blend with the rubber components in the SEBS and MAH-g-EVA matrix, further enhancing the bonding strength between the inorganic filler and the matrix. Finally, the surface treatment is carried out with a fatty alcohol polyoxyethylene ether solution, which not only reduces the surface energy of the inorganic filler, reduces the agglomeration phenomenon between particles, and improves the dispersibility of the inorganic filler. At the same time, the fatty alcohol polyoxyethylene ether molecules have physical or chemical interactions with the surface of the inorganic filler and the silicone rubber layer, enhancing the interfacial bonding strength, making the inorganic filler not easily fall off from the surface of the matrix, and effectively reducing the dust shedding phenomenon.

[0020] Preferably, the high-temperature heat-sealing strip further includes 8-12 parts by mass of polyamide and 0.3-0.7 parts by mass of modified montmorillonite.

[0021] Preferably, the polyamide is polyamide 6.

[0022] Preferably, the preparation method of the modified montmorillonite includes the following steps: Mix the montmorillonite with water evenly, then add the quaternary ammonium salt solution and mix evenly, heat up to 60-80 °C, react for 2-6 h, cool down, carry out solid-liquid separation, wash, dry, and sieve to obtain it; The montmorillonite is sodium-based montmorillonite, and the mass fraction of the quaternary ammonium salt solution is 5%-15%; the mass ratio of the montmorillonite to the quaternary ammonium salt solution is 1:(2-4).

[0023] Preferably, the quaternary ammonium salt solution is any one of cetyltrimethylammonium bromide solution and octadecyltrimethylammonium chloride solution.

[0024] Preferably, the high-temperature heat-sealing strip further includes 5-7 parts by mass of polypropylene.

[0025] In this technical solution, at high temperatures, when polypropylene acts together with SEBS, MAH-g-EVA, etc., the network structure formed by the three is denser, which can restrict the excessive movement of the molecular chains of SEBS and MAH-g-EVA at high temperatures.

[0026] At high temperatures, through the interaction with SEBS and MAH-g-EVA, polypropylene can also disperse external forces more evenly throughout the system. At the same time, the polar groups of MAH-g-EVA help to enhance the intermolecular binding force. The three act synergistically to improve the mechanical properties such as the tensile strength and tear strength of the heat-sealing strip, making it not easily damaged under high-temperature and stressed conditions.

[0027] Second, the present application provides a method for preparing a high-temperature resistant heat-sealing strip, including the following steps: S1: Pre-mix the hydrogenated styrene-butadiene-styrene block copolymer, maleic anhydride grafted EVA, and a part of the hydrogenated terpene resin evenly, then add the modified inorganic filler, epoxy soybean oil, titanate coupling agent, and a part of the antioxidant and mix evenly to obtain a pre-mixed material; S2: Transfer the pre-mixed material into an internal mixer, mix at 130-150 °C for 5-10 min, then add the repair agent, mix for 15-20 min, add the remaining hydrogenated terpene resin and a part of the composite cross-linking agent, continue to mix for 5-10 min, raise the temperature to 150-170 °C, add the remaining composite cross-linking agent and the remaining antioxidant, mix for 10-20 min, and cool to obtain an extrusion material; S3: Transport the extrusion material to the feed inlet of a twin-screw extruder, extrude, pelletize, and cool to obtain masterbatch; S4: Transport the masterbatch to the feed inlet of a casting machine, melt it, extrude it, and solidify it to obtain the product.

[0028] Preferably, the rotor speed of the internal mixer is 60-80 r / min.

[0029] Preferably, in the twin-screw extruder, the screw speed is 100-200 r / min. From the feed inlet to the discharge outlet, the temperature settings of each zone are as follows: zone 1 is 120-140 °C, zone 2 is 160-180 °C, zone 3 is 200-220 °C, and zone 4 is 220-240 °C.

[0030] Preferably, the extrusion speed of the casting machine is 0.5-1 m / min, and the cooling temperature is 20-30 °C.

[0031] Preferably, the die head temperature of the casting machine is set to 170-180 °C.

[0032] Preferably, in step S1, when adding maleic anhydride grafted EVA, the steps of adding polyamide and modified montmorillonite are also included.

[0033] Preferably, before adding the polyamide and the modified montmorillonite, the following pretreatment steps are carried out: After melting and blending the polyamide and the modified montmorillonite, extrude, pelletize, and cool for standby.

[0034] In this technical solution, melting and blending the polyamide and the modified montmorillonite and then adding them to the system can promote the more uniform dispersion of the lamellae of the modified montmorillonite in the polyamide matrix and form a strong interfacial bond with the polyamide, significantly improving the temperature resistance of the polyamide. Subsequently, through the interaction with molecules such as SEBS and MAH-g-EVA, the structure of the entire heat-sealing strip becomes more dense, effectively preventing the penetration of water molecules, avoiding problems such as strength reduction and dimensional changes caused by water absorption of the polyamide, and improving the performance stability and service life of the heat-sealing strip. At the same time, the uniformly dispersed and tightly bonded modified montmorillonite lamellae with the polyamide can play a role similar to that of reinforcing fibers when the heat-sealing strip is subjected to external forces. It can effectively disperse stress and prevent the propagation of cracks.

[0035] Preferably, in step S1, when adding maleic anhydride grafted EVA, the step of adding polypropylene is also included.

[0036] In summary, the present application has the following beneficial effects: 1. The present application uses SEBS and MAH-g-EVA to endow the heat-sealing strip with basic temperature resistance. The composite cross-linking agent promotes the formation of a three-dimensional network structure of polymer molecular chains, enhancing the thermal stability; the repair agent fills and repairs the microscopic defects inside the strip through the moderate fracture and combination of dynamic covalent bonds at high temperatures, enhancing the thermal stability and sealing performance of the heat-sealing strip, making it suitable for a variety of high-temperature heat-sealing scenarios.

[0037] 2. The present application uses the compounding of SEBS and MAH-g-EVA to provide good compatibility. The hydrogenated terpene resin enhances the adhesion and cohesive strength between the two through physical entanglement, ensuring that the heat-sealing strip can firmly adhere to the material to be sealed during heat-sealing, is not easily degummed, and achieves a tight and lasting sealing effect, meeting the basic requirements of various sealing scenarios.

[0038] 3. The present application effectively disperses stress through the modified inorganic filler and transfers it to the polymer molecules, significantly improving the tensile strength and flexural strength of the heat-sealing strip. The synergistic repair agent dissipates energy through the fracture and reformation of dynamic covalent bonds when stressed, enabling the strip to have excellent mechanical stability and be able to withstand complex external forces while maintaining its structural integrity. Detailed implementation manners

[0039] The following further elaborates on the present application in conjunction with embodiments.

[0040] Unless otherwise specified, the raw materials used in the examples and comparative examples of this application are all commercially available.

[0041] In the following examples: The molecular weight distribution index of the hydrogenated styrene-butadiene-styrene block copolymer (hereinafter referred to as SEBS) used is controlled between 1.0 and 1.5, and the weight-average molecular weight is 100,000 to 200,000; The hydrogenated terpene resin used has a softening point of 120 to 140 °C, The maleic anhydride grafted EVA (hereinafter referred to as MAH-g-EVA) used has a grafting rate of 1.2%; The titanate coupling agent is isopropyltris(dioctylpyrophosphatooxy)titanate (hereinafter referred to as titanate coupling agent 201).

[0042] Preparation Examples 1-4 Modified Inorganic Filler Preparation Example 1 Add 100 g of talc powder to a high-speed mixer, start the high-speed mixer, set the rotation speed to 300 r / min, then slowly add 1 g of aluminate coupling agent DL-411, stir and mix for 15 min, then take out, immerse it in 100 g of a silicone rubber solution with a mass fraction of 10%, stir and impregnate for 2 h, then let it stand for 30 min, remove the supernatant, transfer the solid product to a drying oven, dry it to constant weight at 80 °C, then transfer it to a stirring container, add 30 g of a fatty alcohol polyoxyethylene ether solution with a mass fraction of 5%, stir and mix for 30 min, then transfer the mixture to a drying oven, dry it to constant weight at 80 °C, grind and disperse, pass through a 325-mesh standard sieve, and take the undersize to obtain the modified inorganic filler.

[0043] Among them, the silicone rubber solution is prepared from methyl vinyl silicone rubber and toluene; the fatty alcohol polyoxyethylene ether solution is prepared from AEO-9 and deionized water; Before using the talc powder, dry it to constant weight in a drying oven at 80 °C, then grind and disperse, pass through a 400-mesh sieve, and take the undersize for standby.

[0044] Preparation Example 2 Add 70 g of talcum powder and 30 g of wollastonite into a high-speed mixer. Start the high-speed mixer, set the rotation speed to 300 r / min, and then slowly add 1.5 g of aluminate coupling agent DL-411. After stirring and mixing for 15 min, take it out and immerse it in 100 g of silicone rubber solution with a mass fraction of 20%. After stirring and impregnating for 3 h, let it stand for 30 min, remove the supernatant, transfer the solid product to a drying oven, dry it to a constant weight at 80 °C, then transfer it to a stirring container, add 30 g of fatty alcohol polyoxyethylene ether solution with a mass fraction of 10%, stir and mix for 30 min, transfer the mixture to a drying oven, dry it to a constant weight at 80 °C, grind and disperse it, pass through a 325-mesh standard sieve, and take the material under the sieve to obtain the modified inorganic filler.

[0045] Among them, the silicone rubber solution is prepared from methyl vinyl silicone rubber and toluene; the fatty alcohol polyoxyethylene ether solution is prepared from AEO-9 and deionized water; Before use, the talcum powder and wollastonite are dried to a constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 400-mesh sieve, and the material under the sieve is taken for standby.

[0046] Preparation Example 3 Add 50 g of talcum powder and 50 g of wollastonite into a high-speed mixer. Start the high-speed mixer, set the rotation speed to 300 r / min, and then slowly add 2 g of aluminate coupling agent DL-42. After stirring and mixing for 15 min, take it out and immerse it in 120 g of silicone rubber solution with a mass fraction of 15%. After stirring and impregnating for 4 h, let it stand for 30 min, remove the supernatant, transfer the solid product to a drying oven, dry it to a constant weight at 80 °C, then transfer it to a stirring container, add 40 g of fatty alcohol polyoxyethylene ether solution with a mass fraction of 8%, stir and mix for 30 min, transfer the mixture to a drying oven, dry it to a constant weight at 80 °C, grind and disperse it, pass through a 325-mesh standard sieve, and take the material under the sieve to obtain the modified inorganic filler.

[0047] Among them, the silicone rubber solution is prepared from methyl vinyl silicone rubber and toluene; the fatty alcohol polyoxyethylene ether solution is prepared from AEO-9 and deionized water; Before use, the talcum powder and wollastonite are dried to a constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 400-mesh sieve, and the material under the sieve is taken for standby.

[0048] Preparation Example 4 Add 40 g of talcum powder and 60 g of wollastonite into a high-speed mixer. Start the high-speed mixer, set the rotation speed to 300 r / min, then slowly add 2 g of aluminate coupling agent DL-42. After stirring and mixing for 15 min, take out the mixture and immerse it in 150 g of silicone rubber solution with a mass fraction of 15%. After stirring and impregnating for 4 h, let it stand for 30 min, remove the supernatant, transfer the solid product to a drying oven, dry it to a constant weight at 80 °C, then transfer it to a stirring container, add 50 g of fatty alcohol polyoxyethylene ether solution with a mass fraction of 8%, stir and mix for 30 min, transfer the mixture to a drying oven, dry it to a constant weight at 80 °C, grind and disperse it, pass through a 325-mesh standard sieve, and take the material under the sieve to obtain the modified inorganic filler.

[0049] Among them, the silicone rubber solution is prepared from methyl vinyl silicone rubber and toluene; the fatty alcohol polyoxyethylene ether solution is prepared from AEO-9 and deionized water. Before use, talcum powder and wollastonite are dried to a constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 400-mesh sieve, and the material under the sieve is taken for standby.

[0050] Preparation Examples 5-7 Modified Montmorillonite Preparation Example 5 Add 20 g of sodium-based montmorillonite into a container equipped with 40 g of deionized water, stir and mix at a rotation speed of 200 r / min for 30 min, then add 40 g of quaternary ammonium salt solution with a mass fraction of 5% and stir and mix evenly. Then raise the temperature to 60 °C, stir and react for 6 h, cool down, after centrifugal separation, let it stand for 30 min, remove the supernatant, rinse twice with deionized water, transfer to a drying oven, dry to a constant weight at 80 °C, grind and disperse it, pass through a 325-mesh standard sieve, and take the material under the sieve to obtain the modified montmorillonite.

[0051] Among them, the quaternary ammonium salt solution is prepared from cetyltrimethylammonium bromide and deionized water.

[0052] Before use, sodium-based montmorillonite is dried to a constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 500-mesh sieve, and the material under the sieve is taken for standby.

[0053] Preparation Example 6 Add 20 g of sodium-based montmorillonite into a container equipped with 40 g of deionized water, stir and mix at a rotation speed of 200 r / min for 30 min, then add 80 g of quaternary ammonium salt solution with a mass fraction of 15% and stir and mix evenly. Then raise the temperature to 80 °C, stir and react for 2 h, cool down, after centrifugal separation, let it stand for 30 min, remove the supernatant, rinse twice with deionized water, transfer to a drying oven, dry to a constant weight at 80 °C, grind and disperse it, pass through a 325-mesh standard sieve, and take the material under the sieve to obtain the modified montmorillonite.

[0054] Among them, the quaternary ammonium salt solution is prepared from cetyltrimethylammonium bromide and deionized water.

[0055] Before use, the sodium-based montmorillonite is dried to constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 500-mesh sieve, and the material passing through the sieve is taken for standby.

[0056] Preparation Example 7 Add 20 g of sodium-based montmorillonite to a container containing 40 g of deionized water, stir and mix at a speed of 200 r / min for 30 min, then add 60 g of a 10% quaternary ammonium salt solution and stir and mix evenly. Then, heat up to 70 °C, stir and react for 4 h, cool down, after centrifugal separation, let stand for 30 min, remove the supernatant, rinse twice with deionized water, transfer to a drying oven, dry to constant weight at 80 °C, grind and disperse, pass through a 325-mesh standard sieve, and take the material passing through the sieve to obtain the modified montmorillonite.

[0057] Among them, the quaternary ammonium salt solution is prepared from octadecyltrimethylammonium chloride and deionized water.

[0058] Before use, the sodium-based montmorillonite is dried to constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 500-mesh sieve, and the material passing through the sieve is taken for standby.

[0059] Example 1 This example provides a high-temperature heat-sealing rubber strip, which is made of the following raw materials in parts by mass: 150 g of SEBS, 350 g of MAH-g-EVA, 100 g of hydrogenated terpene resin, 30 g of modified inorganic filler, 30 g of epoxidized soybean oil, 6 g of titanate coupling agent 201, 1.5 g of antioxidant 3114, 1.5 g of triphenyl phosphite, 10 g of ditert-butylperoxide diisopropylbenzene, 5 g of vinyltrimethoxysilane, 17.1 g of 1,4-divinylbenzene, 8.6 g of benzoquinone, and 4.3 g of tributyl borate.

[0060] Among them, the modified inorganic filler is from Preparation Example 1.

[0061] This example also provides a preparation method of a high-temperature heat-sealing rubber strip, including the following steps: S1: Add 150 g of SEBS, 350 g of MAH-g-EVA, and 50 g of hydrogenated terpene resin to a high-speed mixer, mix at a stirring speed of 800 r / min for 20 min, then adjust the stirring speed to 500 r / min, add 30 g of modified inorganic filler, 30 g of epoxidized soybean oil, 6 g of titanate coupling agent 201, 1 g of antioxidant 3114, and 1 g of triphenyl phosphite, and stir and mix for 25 min to obtain a premix; S2: Transfer the premix into a Banbury mixer, adjust the rotor speed of the Banbury mixer to 80 r / min, heat up to 130 °C, stir and mix for 10 min, then add 17.1 g of 1,4-divinylbenzene, 8.6 g of benzoquinone and 4.3 g of tributyl borate and stir and mix for 20 min. Then add 50 g of hydrogenated terpene resin, 5 g of ditert-butyl peroxide diisopropylbenzene and 2.5 g of vinyltrimethoxysilane and stir and mix for 10 min. Continue to heat up to 150 °C, add 5 g of ditert-butyl peroxide diisopropylbenzene, 2.5 g of vinyltrimethoxysilane, 0.5 g of antioxidant 3114 and 0.5 g of triphenyl phosphite and stir and mix for 20 min, then cool with water to obtain the extruded material; S3: Convey the extruded material to the feeding port of a twin-screw extruder, extrude, pelletize and cool with air to obtain the masterbatch; S4: Convey the masterbatch to the feeding port of a casting machine, set the melting temperature of the casting machine to 165 - 175 °C. After melting, install a die of corresponding specification, extrude, and cure naturally at room temperature for 30 min to obtain the high-temperature heat-sealing rubber strip.

[0062] Among them, in step S3, the screw speed is 100 r / min. From the feeding port to the discharging port, the temperature settings of each zone are as follows: zone 1 is 120 - 140 °C, zone 2 is 160 - 180 °C, zone 3 is 200 - 220 °C and zone 4 is 220 - 240 °C; the air-cooling wind speed is 5 m / s, and the air temperature is maintained between 20 - 25 °C; In step S4, the die head temperature of the casting machine is set to 170 °C, and the extrusion speed is 0.5 m / min.

[0063] Example 2 This example provides a high-temperature heat-sealing rubber strip, which is made from the following raw materials in parts by mass: 250 g of SEBS, 250 g of MAH-g-EVA, 200 g of hydrogenated terpene resin, 60 g of modified inorganic filler, 50 g of epoxy soybean oil, 10 g of titanate coupling agent 201, 5 g of antioxidant 3114, 1 g of triphenyl phosphite, 15 g of ditert-butyl peroxide diisopropylbenzene, 10 g of vinyltrimethoxysilane, 27.7 g of 1,4-divinylbenzene, 18.5 g of benzoquinone and 13.8 g of pentaerythritol borate ester.

[0064] Among them, the modified inorganic filler comes from Preparation Example 2.

[0065] This example also provides a preparation method of a high-temperature heat-sealing rubber strip, which includes the following steps: S1: Add 250 g of SEBS, 250 g of MAH-g-EVA, and 100 g of hydrogenated terpene resin into a high-speed mixer. After mixing at a stirring speed of 800 r / min for 20 min, adjust the stirring speed to 500 r / min, and add 60 g of modified inorganic filler, 50 g of epoxidized soybean oil, 10 g of titanate coupling agent 201, 3 g of antioxidant 3114, and 0.5 g of triphenyl phosphite, and stir and mix for 25 min to obtain a premix. S2: Transfer the premix into an internal mixer, adjust the rotor speed of the internal mixer to 60 r / min, heat up to 150 °C, stir and mix for 5 min, then add 27.7 g of 1,4-divinylbenzene, 18.5 g of benzoquinone, and 13.8 g of pentaerythritol borate ester and stir and mix for 15 min. Then add 100 g of hydrogenated terpene resin, 7.5 g of ditert-butyl peroxide diisopropylbenzene, and 5 g of vinyltrimethoxysilane and stir and mix for 5 min. Continue to heat up to 170 °C, add 7.5 g of ditert-butyl peroxide diisopropylbenzene, 5 g of vinyltrimethoxysilane, 2 g of antioxidant 3114, and 0.5 g of triphenyl phosphite and stir and mix for 20 min, then cool with water to obtain an extruded material. S3: Convey the extruded material to the feeding port of a twin-screw extruder, extrude, pelletize, and cool with air to obtain masterbatch. S4: Convey the masterbatch to the feeding port of a casting machine, set the melting temperature of the casting machine to 165 - 175 °C. After melting, install a mold of corresponding specifications, extrude, and cure at room temperature naturally for 30 min to obtain a high-temperature heat-sealing rubber strip.

[0066] Among them, in step S3, the screw speed is 200 r / min. From the feeding port to the discharging port, the temperature settings of each zone are as follows: zone 1: 120 - 140 °C, zone 2: 160 - 180 °C, zone 3: 200 - 220 °C, and zone 4: 220 - 240 °C; the air-cooling wind speed is 3 m / s, and the air temperature is maintained between 20 - 25 °C. In step S4, the die head temperature of the casting machine is set to 180 °C, and the extrusion speed is 1 m / min.

[0067] Example 3 This example provides a high-temperature heat-sealing rubber strip, which is made from raw materials in the following mass parts: 200 g of SEBS, 300 g of MAH-g-EVA, 160 g of hydrogenated terpene resin, 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 3 g of antioxidant 3114, 2 g of triphenyl phosphite, 12 g of ditert-butyl peroxide diisopropylbenzene, 8 g of vinyltrimethoxysilane, 25 g of 1,4-divinylbenzene, 15 g of benzoquinone, and 10 g of pentaerythritol borate ester.

[0068] Among them, the modified inorganic filler is from Preparation Example 3.

[0069] This embodiment also provides a method for preparing a high-temperature resistant heat-sealing rubber strip, which includes the following steps: S1: Add 200 g of SEBS, 300 g of MAH-g-EVA, and 100 g of hydrogenated terpene resin into a high-speed mixer. After mixing at a stirring speed of 800 r / min for 20 min, adjust the stirring speed to 500 r / min, and add 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite, and stir and mix for 25 min to obtain a premix; S2: Transfer the premix into a kneader, adjust the rotor speed of the kneader to 70 r / min, heat up to 140 °C, stir and mix for 8 min, then add 27.7 g of 1,4-divinylbenzene, 18.5 g of benzoquinone, and 13.8 g of pentaerythritol borate, and stir and mix for 18 min. Then add 60 g of hydrogenated terpene resin, 6 g of ditert-butyl peroxide diisopropylbenzene, and 4 g of vinyltrimethoxysilane, and stir and mix for 8 min. Continue to heat up to 160 °C, add 6 g of ditert-butyl peroxide diisopropylbenzene, 4 g of vinyltrimethoxysilane, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite, and stir and mix for 20 min, then cool with water to obtain an extruded material; S3: Convey the extruded material to the feed inlet of a twin-screw extruder, extrude, pelletize, and cool with air to obtain masterbatch; S4: Convey the masterbatch to the feed inlet of a casting machine, set the melting temperature of the casting machine to 165 - 175 °C. After melting, install a mold of corresponding specification, extrude, and cure at room temperature naturally for 30 min to obtain the high-temperature resistant heat-sealing rubber strip.

[0070] Among them, in step S3, the screw speed is 150 r / min. From the feed inlet to the discharge outlet, the temperature settings of each zone are as follows: zone 1 is 120 - 140 °C, zone 2 is 160 - 180 °C, zone 3 is 200 - 220 °C, and zone 4 is 220 - 240 °C; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C; In step S4, the die head temperature of the casting machine is set to 175 °C, and the extrusion speed is 0.8 m / min.

[0071] Example 4 This embodiment provides a high-temperature resistant heat-sealing rubber strip, which is made from the following raw materials in parts by mass: 200 g of SEBS, 300 g of MAH-g-EVA, 160 g of hydrogenated terpene resin, 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 3 g of antioxidant 3114, 2 g of triphenyl phosphite, 12 g of ditert-butyl peroxide diisopropylbenzene, 8 g of vinyltrimethoxysilane, 2 g of zinc acrylate, 25 g of 1,4-divinylbenzene, 15 g of benzoquinone, and 10 g of pentaerythritol borate.

[0072] Among them, the modified inorganic filler is from Preparation Example 4.

[0073] This example also provides a method for preparing a high-temperature heat-sealing rubber strip, which includes the following steps: S1: Add 200 g of SEBS, 300 g of MAH-g-EVA, and 100 g of hydrogenated terpene resin into a high-speed mixer. After mixing at a stirring speed of 800 r / min for 20 min, adjust the stirring speed to 500 r / min, add 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite, and stir and mix for 25 min to obtain a premix; S2: Transfer the premix into an internal mixer, adjust the rotor speed of the internal mixer to 70 r / min, heat up to 140 °C, stir and mix for 8 min, then add 27.7 g of 1,4-divinylbenzene, 18.5 g of benzoquinone, and 13.8 g of pentaerythritol borate and stir and mix for 18 min. Then add 60 g of hydrogenated terpene resin, 6 g of ditert-butyl peroxide diisopropylbenzene, 4 g of vinyltrimethoxysilane, and 1 g of zinc acrylate and stir and mix for 8 min. Continue to heat up to 160 °C, add 6 g of ditert-butyl peroxide diisopropylbenzene, 4 g of vinyltrimethoxysilane, 1 g of zinc acrylate, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite and stir and mix for 20 min, then cool with water to obtain an extruded material; S3: Convey the extruded material to the feed inlet of a twin-screw extruder, extrude, pelletize, and cool with air to obtain masterbatch; S4: Convey the masterbatch to the feed inlet of a casting machine, set the melting temperature of the casting machine to 165 - 175 °C. After melting, install a die of the corresponding specification, extrude, and naturally cure at room temperature for 30 min to obtain the high-temperature heat-sealing rubber strip.

[0074] Among them, in step S3, the screw speed is 150 r / min. From the feed inlet to the discharge outlet, the temperature settings of each zone are as follows: zone 1 is 120 - 140 °C, zone 2 is 160 - 180 °C, zone 3 is 200 - 220 °C, and zone 4 is 220 - 240 °C; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C; In step S4, the die head temperature of the casting machine is set to 175 °C, and the extrusion speed is 0.8 m / min.

[0075] Example 5 This embodiment provides a high-temperature resistant heat-sealing rubber strip, which is made of raw materials in the following parts by mass: 200 g of SEBS, 300 g of MAH-g-EVA, 160 g of hydrogenated terpene resin, 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 3 g of antioxidant 3114, 2 g of triphenyl phosphite, 12 g of ditert-butyl peroxide diisopropylbenzene, 8 g of vinyltrimethoxysilane, 5 g of zinc acrylate, 25 g of 1,4-divinylbenzene, 15 g of benzoquinone, 10 g of pentaerythritol borate, 80 g of polyamide 6, and 3 g of modified montmorillonite.

[0076] Among them, the modified inorganic filler is from Preparation Example 4; the modified montmorillonite is from Preparation Example 5.

[0077] This embodiment also provides a preparation method of the high-temperature resistant heat-sealing rubber strip, which includes the following steps: S1: Add 200 g of SEBS, 300 g of MAH-g-EVA, 80 g of polyamide 6, 3 g of modified montmorillonite, and 100 g of hydrogenated terpene resin into a high-speed mixer, mix at a stirring speed of 800 r / min for 20 min, then adjust the stirring speed to 500 r / min, add 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite and stir and mix for 25 min to obtain a premix; S2: Transfer the premix into an internal mixer, adjust the rotor speed of the internal mixer to 70 r / min, heat up to 140 °C, stir and mix for 8 min, then add 27.7 g of 1,4-divinylbenzene, 18.5 g of benzoquinone, and 13.8 g of pentaerythritol borate and stir and mix for 18 min, then add 60 g of hydrogenated terpene resin, 6 g of ditert-butyl peroxide diisopropylbenzene, 4 g of vinyltrimethoxysilane, and 2.5 g of zinc acrylate and stir and mix for 8 min, continue to heat up to 160 °C, add 6 g of ditert-butyl peroxide diisopropylbenzene, 4 g of vinyltrimethoxysilane, 2.5 g of zinc acrylate, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite and stir and mix for 20 min, then cool with water to obtain an extruded material; S3: Transport the extruded material to the feeding port of a twin-screw extruder, extrude, pelletize, and air-cool to obtain masterbatch; S4: Transport the masterbatch to the feeding port of a casting machine, set the melting temperature of the casting machine to 165 - 175 °C, after melting, install a mold of corresponding specifications, extrude, and naturally cure at room temperature for 30 min to obtain the high-temperature resistant heat-sealing rubber strip.

[0078] Among them, in step S3, the screw rotation speed is 150 r / min. From the feed inlet to the discharge outlet, the temperature settings for each zone are as follows: zone 1 is 120 - 140 °C, zone 2 is 160 - 180 °C, zone 3 is 200 - 220 °C, and zone 4 is 220 - 240 °C; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C. In step S4, the die head temperature of the casting machine is set to 175 °C, and the extrusion speed is 0.8 m / min.

[0079] Before adding polyamide 6 and modified montmorillonite, the following pretreatment steps are carried out: 80 g of polyamide 6 and 3 g of modified montmorillonite are added to a single-screw extruder. The screw rotation speed is 40 r / min. The temperature of the feeding zone is set to 180 - 200 °C, the temperature of the compression zone is set to 200 - 220 °C, the temperature of the metering zone and the head zone is set to 220 - 240 °C. Then extrude, pelletize, and cool with air-cooling for standby.

[0080] Before melt blending of polyamide 6, it is dried to constant weight at 100 °C in a vacuum drying oven; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C.

[0081] Example 6 The difference between this example and Example 5 is: The dosage of polyamide 6 is 120 g, and the dosage of modified montmorillonite is 7 g.

[0082] Before adding polyamide 6 and modified montmorillonite, the following pretreatment steps are carried out: 120 g of polyamide 6 and 7 g of modified montmorillonite are added to a single-screw extruder. The screw rotation speed is 60 r / min. The temperature of the feeding zone is set to 180 - 200 °C, the temperature of the compression zone is set to 200 - 220 °C, the temperature of the metering zone and the head zone is set to 220 - 240 °C. Then extrude, pelletize, and cool with air-cooling for standby.

[0083] Before melt blending of polyamide 6, it is dried to constant weight at 100 °C in a vacuum drying oven; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C.

[0084] The modified montmorillonite is from Preparation Example 6.

[0085] Other conditions are the same as in Example 5.

[0086] Example 7 The difference between this example and Example 6 is: This embodiment provides a high-temperature resistant heat-sealing rubber strip, which is made of the following raw materials in parts by mass: 200 g of SEBS, 300 g of MAH-g-EVA, 160 g of hydrogenated terpene resin, 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 3 g of antioxidant 3114, 2 g of triphenyl phosphite, 12 g of ditert-butyl peroxide diisopropylbenzene, 8 g of vinyltrimethoxysilane, 5 g of zinc acrylate, 25 g of 1,4-divinylbenzene, 15 g of benzoquinone, 10 g of pentaerythritol borate, 100 g of polyamide 6, 5 g of modified montmorillonite and 50 g of polypropylene.

[0087] Among them, the modified montmorillonite is from Preparation Example 7.

[0088] Step S1 is as follows: Add 200 g of SEBS, 300 g of MAH-g-EVA, 80 g of polyamide 6, 5 g of modified montmorillonite, 50 g of polypropylene, and 100 g of hydrogenated terpene resin into a high-speed mixer, mix at a stirring speed of 800 r / min for 20 min, then adjust the stirring speed to 500 r / min, add 50 g of modified inorganic filler, 40 g of epoxidized soybean oil, 8 g of titanate coupling agent 201, 1.5 g of antioxidant 3114, and 1 g of triphenyl phosphite and stir and mix for 25 min to obtain a premix; Before adding polyamide 6 and modified montmorillonite, the following pretreatment steps are carried out: Add 100 g of polyamide 6 and 5 g of modified montmorillonite into a single-screw extruder, the screw speed is 50 r / min, the temperature of the feeding zone is set at 180 - 200 °C, the temperature of the compression zone is set at 200 - 220 °C, the temperature of the metering zone and the head zone is set at 220 - 240 °C, extrude, pelletize, and cool with air cooling for standby.

[0089] Before melt blending of polyamide 6, it is dried to constant weight at 100 °C in a vacuum drying oven; the air-cooling wind speed is 4 m / s, and the air temperature is maintained between 20 - 25 °C.

[0090] Others are the same as in Example 6.

[0091] Example 8 The difference between this embodiment and Example 7 is that: The dosage of polypropylene is 70 g.

[0092] Others are the same as in Example 7.

[0093] Comparative Example 1 The difference between this comparative example and Example 1 is that: The inorganic filler is not modified, and the inorganic filler is talc powder of equal mass.

[0094] Before using the talc powder, it is dried to constant weight in a drying oven at 80 °C, then ground and dispersed, passed through a 400-mesh sieve, and the material under the sieve is taken for standby.

[0095] The others are the same as in Example 1.

[0096] Comparative Example 2 The difference between this comparative example and Example 1 lies in: During the preparation of the high-temperature resistant heat-sealing strip, the repair agent was not added, that is, 1,4-divinylbenzene, benzoquinone and pentaerythritol borate were not added.

[0097] The others are the same as in Example 1.

[0098] Comparative Example 3 The difference between this comparative example and Example 1 lies in: During the preparation of the high-temperature resistant heat-sealing strip, vinyltrimethoxysilane was not added.

[0099] The others are the same as in Example 1.

[0100] Performance detection test Preparation of test specimens for detection: The high-temperature resistant heat-sealing strips (with a thickness of 1.5 mm and a width of 50 mm) prepared in Examples 1-8 and Comparative Examples 1-3 were respectively placed at the parts of the fabric that needed to be sealed, and a hot pressing device was used for pressing. The hot pressing temperature was 150 °C, the pressure was 0.4 MPa, and the time was controlled at 15 s to obtain multiple groups of test specimens to be detected. After being marked one by one, they were placed in an environment with a temperature of (23±2) °C and a relative humidity of (50±5)% for 24 h of equilibration, and then subsequent detections were carried out. Among them, the fabric was a TPU composite fabric.

[0101] Sealing performance detection: Observe one by one in the test specimens to be detected whether the joint between the adhesive film and the fabric is flat, and whether there are phenomena such as air bubbles, wrinkles, lack of glue, etc. The detection results are shown in Table 1.

[0102] Thermal stability detection: The test specimens were placed in a constant temperature oven and kept at 100 °C for 4 hours. After the treatment was completed, they were naturally cooled, the test specimens were taken out, and it was observed whether there were phenomena such as discoloration, deformation, and degumming at the joint between the strip and the fabric. The detection results are shown in Table 1.

[0103] Peeling force detection: One end of the test specimen was fixed on the fixture of an electronic universal testing machine, and the separated part of the fabric and the strip at the other end was fixed on the lower fixture, so that the peeling direction of the strip from the fabric was consistent with the tensile direction of the testing machine. The test speed was set at 100 mm / min, the testing machine was started for the peeling test, and the force value change during the process of the strip peeling from the fabric was recorded in real time. Each group of tests was repeated 5 times, and the average peeling force was taken as the detection result. The test results are shown in Table 1.

[0104] Tensile strength and elongation at break testing: Mount the specimen on the fixture of an electronic universal testing machine, ensuring that the tensile direction is consistent with the length direction of the rubber strip on the fabric. Set the test speed at 50 mm / min, start the testing machine for tensile testing until the specimen breaks. Through the data processing system of the testing machine, calculate the tensile strength and elongation at break. Each group of tests is repeated 5 times, and the average value is taken as the final test result. The test results are shown in Table 1.

[0105] Table 1 Performance test data of high-temperature resistant heat-sealing rubber strips for Examples 1 - 8 and Comparative Examples 1 - 3

[0106] From the analysis of the test results in Table 1, it can be seen that: Compared with Comparative Example 1, in Example 1, through the modification of the inorganic filler talcum powder, the prepared high-temperature resistant heat-sealing rubber strip has better sealing performance, thermal stability, and mechanical properties. This is mainly because the modified inorganic filler can be evenly dispersed and form more stable chemical bonds or physical combinations with other components of the rubber strip, thus enhancing the overall performance of the rubber strip and enabling it to better resist external forces.

[0107] Compared with Comparative Example 2, in Example 1, during the hot pressing process, the repair agent fills and repairs the possible microscopic defects (such as small air bubbles, gaps, etc.) inside the rubber strip, not only making the rubber strip fit more closely with the fabric and improving the sealing performance, but also enhancing the structural integrity of the rubber strip at high temperatures and further improving its thermal stability.

[0108] Compared with Comparative Example 3, in Example 1, by adding vinyltrimethoxysilane, a significant improvement in thermal stability is observed. This is because vinyltrimethoxysilane can form chemical bonding between the inorganic filler and the polymer matrix, as well as between the rubber strip and the fabric, thereby enhancing the bonding force between the phases. This enhanced bonding force effectively prevents interface separation and structural damage caused by temperature increase, and thus improves the thermal stability of the rubber strip.

[0109] From Examples 1 - 3, it can be seen that by optimizing the dosage of each component and the preparation method, the prepared high-temperature resistant heat-sealing rubber strip has better sealing performance, thermal stability, and mechanical properties.

[0110] From Examples 3 - 8, it can be seen that by further adding zinc acrylate, polyamide 6, modified montmorillonite, and polypropylene, the performance of the high-temperature resistant heat-sealing rubber strip is further improved. Zinc acrylate enhances the intermolecular force, making the structure of the rubber strip more dense and improving the sealing performance and mechanical properties. After polyamide 6 and modified montmorillonite are melt-blended and added to the system, the high-temperature resistance performance and surface performance of the rubber strip are improved; the addition of polypropylene enhances the structural stability of the rubber strip and also has a positive impact on the sealing performance.

[0111] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A high-temperature resistant heat-sealing rubber strip, characterized in that, It is made from the following raw materials in parts by mass: 15-25 parts by mass of hydrogenated styrene-butadiene-styrene block copolymer, 25-35 parts by mass of maleic anhydride grafted EVA, 10-20 parts by mass of hydrogenated terpene resin, 3-6 parts by mass of modified inorganic filler, 3-5 parts by mass of epoxidized soybean oil, 0.6-1 part by mass of titanate coupling agent, 0.3-0.6 part by mass of antioxidant, 1.5-2.5 parts by mass of composite crosslinking agent, and 3-6 parts by mass of repair agent; The composite crosslinking agent includes bis(tert-butylperoxy)diisopropylbenzene, vinyltrimethoxysilane, and zinc acrylate; The repair agent includes 1,4-divinylbenzene, benzoquinone, and borate ester.

2. The high-temperature resistant heat-sealing rubber strip according to claim 1, characterized in that, The borate ester is any one of pentaerythritol borate and tributyl borate.

3. The high-temperature resistant heat-sealing rubber strip according to claim 1, characterized in that, The mass ratio of 1,4-divinylbenzene, benzoquinone, and pentaerythritol borate is (4-6):(2-4):(1-3).

4. The high-temperature resistant heat-sealing rubber strip according to claim 1, characterized in that, The preparation method of the modified inorganic filler includes the following steps: Mix the inorganic filler and aluminate coupling agent evenly, then immerse it in the silicone rubber solution, immerse for 2-4 h, let it stand, separate the solid and liquid, dry, add the fatty alcohol polyoxyethylene ether solution and mix evenly, separate the solid and liquid, dry, and sieve to obtain the modified inorganic filler; The mass fraction of the silicone rubber solution is 10%-20%; the mass fraction of the fatty alcohol polyoxyethylene ether solution is 5%-10%; the mass ratio of the inorganic filler, aluminate coupling agent, silicone rubber solution, and fatty alcohol polyoxyethylene ether solution is 1:(0.01-0.02):(1-1.5):(0.3-0.5); the inorganic filler is at least one of talc powder and wollastonite.

5. The high-temperature resistant heat-sealing rubber strip according to claim 1, characterized in that, The high-temperature heat-sealing rubber strip also includes 8-12 parts by mass of polyamide and 0.3-0.7 part by mass of modified montmorillonite.

6. The high-temperature resistant heat-sealing rubber strip according to claim 5, characterized in that, The preparation method of the modified montmorillonite includes the following steps: Mix the montmorillonite and water evenly, then add the quaternary ammonium salt solution and mix evenly, raise the temperature to 60-80 °C, react for 2-6 h, cool down, separate the solid and liquid, wash, dry, and sieve to obtain it; The montmorillonite is sodium-based montmorillonite, the mass fraction of the quaternary ammonium salt solution is 5%-15%; the mass ratio of the montmorillonite to the quaternary ammonium salt solution is 1:(2-4).

7. A preparation method of the high-temperature resistant heat-sealing rubber strip according to any one of claims 1 to 6, characterized in that, It includes the following steps: S1: Premix the hydrogenated styrene-butadiene-styrene block copolymer, maleic anhydride grafted EVA, and a part of the hydrogenated terpene resin evenly, then add the modified inorganic filler, epoxidized soybean oil, titanate coupling agent, and a part of the antioxidant and mix evenly to obtain a premix; S2: Transfer the premix to an internal mixer, mix at 130-150 °C for 5-10 min, add the repair agent, mix for 15-20 min, add the remaining hydrogenated terpene resin and a part of the composite crosslinking agent, continue to mix for 5-10 min, raise the temperature to 150-170 °C, add the remaining composite crosslinking agent and the remaining antioxidant, mix for 10-20 min, and cool to obtain an extruded material; S3: Transport the extruded material to the feeding port of a twin-screw extruder, extrude, pelletize, and cool to obtain masterbatch; S4: Transport the masterbatch to the feeding port of a casting machine, melt it, extrude, and solidify to obtain it.

8. The preparation method of the high-temperature resistant heat-sealing rubber strip according to claim 7, characterized in that, In step S1, when adding maleic anhydride grafted EVA, it also includes the steps of adding polyamide and modified montmorillonite.

9. The preparation method of the high-temperature resistant heat-sealing rubber strip according to claim 8, characterized in that, Before adding the polyamide and modified montmorillonite, the following pretreatment steps are carried out: After melting and blending the polyamide and modified montmorillonite, extrude, pelletize and cool for standby.

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