Long carbon chain nylon material resistant to bis 85 and preparation method and application thereof

Abstract

The application discloses a long carbon chain nylon material resistant to double 85 and a preparation method and application thereof, which are prepared from the following components according to mass percentages: 5-12% of a compatilizer, 3-10% of an epoxy resin, 3-10% of a nylon hot melt adhesive, 1-3% of a colorant, 0.2-1% of an antioxidant, 0.2-0.7% of a lubricant, 0.2-0.5% of a heat stabilizer and the balance of a polyamide resin. Through innovative material and process design, the application can significantly improve the bonding strength of a bonding layer between long chain nylon and a thermoplastic elastomer (TPE), and ensure that the key connecting part can maintain excellent bonding performance without failure even under long-term high-temperature and high-humidity extreme environment tests.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a long carbon chain nylon material resistant to double 85, its preparation method, and its application. Background Technology

[0002] In new energy batteries, many cooling pipes are suspended structures. To meet vibration damping requirements, a layer of TPE material is injection-molded on the outside as a damping layer. This invention adopts a co-extrusion scheme, abandoning the traditional three-layer co-extrusion and achieving two-layer co-extrusion. Through modification, PA1012 exhibits surface activity during extrusion, and its active functional groups tightly bond it to TPE. The water resistance of hot melt adhesive further ensures double "85" 1000H non-detachment. This invention utilizes the excellent flexibility, superior low-temperature resistance, low water absorption, and excellent chemical resistance of long-chain nylon as the inner layer material of the pipe. TPE utilizes its sealing properties to provide sealing, fixation, and vibration damping within the slot. The long-chain nylon and TPE are made into tightly connected inner and outer pipe layers. Given the low domestic production rates of PA12 and PA11, we chose PA1012, which is relatively inexpensive and already maturely mass-produced domestically, achieving complete domestic production. Summary of the Invention

[0003] Based on this, the purpose of this invention is to provide an extrusion-grade long carbon chain nylon material resistant to double 85 adhesive TPE and its preparation method, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention discloses a long-chain carbon nylon material resistant to double 85, which is prepared from the following components in the following mass percentages:

[0006] Compatibilizer 5-12%,

[0007] Epoxy resin 3-10%,

[0008] Nylon hot melt adhesive 3-10%,

[0009] Colorant 1-3%,

[0010] Antioxidant 0.2-1%,

[0011] Lubricant 0.2-0.7%,

[0012] Heat stabilizer 0.2-0.5%,

[0013] Polyamide resin balance.

[0014] The epoxy resin is preferably at least one of 6101 (Baling Petrochemical), SM601 (Jiangsu Runfeng), SM609 (Jiangsu Sanmu), and NPCN-704 (Taiwan Nanya), and the nylon hot melt adhesive is preferably at least one of 2A (EMS), 2513 (Arkema), PA812, and PA801 (Nantong Xiexin). As a further aspect of the invention: the compatibilizer is one or more of grafted POE, grafted EPDM, grafted PP, and grafted SEBS.

[0015] As a further aspect of the present invention, the lubricant is at least one or more of PETS, OP wax, silicone, silicone oil and mesoamide.

[0016] As a further aspect of the present invention: the antioxidant includes a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is at least one or more of antioxidant 245, antioxidant 1010, antioxidant 1098, and antioxidant 9228, and the secondary antioxidant is at least one of antioxidant 168 and antioxidant 626.

[0017] As a further aspect of the present invention: the heat stabilizer is at least one or more of the following: inorganic copper salt nylon heat stabilizer, organic copper salt nylon heat stabilizer, inorganic phosphate nylon heat stabilizer, aluminum silicate treated with titanate and dipentaerythritol [3-(3,5-tert-butyl-4-hydroxyphenyl)propionate] compound heat stabilizer.

[0018] As a further aspect of the present invention: the polyamide resin is PA1012 high viscosity resin with a relative viscosity of 4-8.

[0019] As a further aspect of the present invention: the colorant is at least one or more of nylon-carrier aniline black masterbatch and PE-carrier black masterbatch.

[0020] Secondly, this invention discloses a method for preparing the above-mentioned long-chain carbon nylon material resistant to double 85, comprising the following steps:

[0021] Weigh each component according to the mass percentage, mix the polyamide resin, compatibilizer, epoxy resin and colorant evenly, then add the lubricant, main antioxidant, auxiliary antioxidant, heat stabilizer and nylon hot melt adhesive powder and mix evenly to obtain the mixture.

[0022] The mixture is added to the main feed port of a twin-screw extruder, and after melting, extrusion, cooling, air drying and pelletizing, an extrusion-grade long carbon chain nylon material resistant to double 85 adhesive TPE is obtained.

[0023] The temperatures of the twin-screw extruder, from the first zone to the die head, are 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feeding speed is 35-45 rpm. point.

[0024] Thirdly, this invention discloses the application of the above-mentioned long carbon chain nylon material with double 85 resistance in double-layer co-extrusion materials, wherein the double-layer co-extrusion material includes an inner tube and an outer tube, wherein the inner tube is made of the above-mentioned long carbon chain nylon material, and the outer tube is made of TPE resin.

[0025] As a further aspect of the present invention: the TPE resin has a hardness of 65-70, and its compressive strength at 110℃ and 1.8kN for 200H is less than 2%.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This invention, through innovative material and process design, significantly enhances the bonding strength of the bond layer between long-chain nylon and thermoplastic elastomer (TPE), ensuring that this critical connection maintains its excellent bonding performance without failure even under prolonged exposure to extreme environments such as high temperature and high humidity. Specifically, this invention introduces specific compatibilizers and epoxy resins to improve the molecular interactions between the two materials, thereby greatly increasing their bonding strength. This allows composite products made of long-chain nylon and TPE to exhibit excellent stability and durability in a variety of harsh application environments. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] The specific information of the raw materials used in the following examples and comparative examples is as follows:

[0031] The lubricant is a silicone masterbatch, manufactured by Chengdu Silike Technology Co., Ltd., and its brand name is LYSI-306.

[0032] The main antioxidant is antioxidant 1098, manufactured by Tianjin Lialong.

[0033] The auxiliary antioxidant is antioxidant 168, manufactured by Tianjin Lialong.

[0034] Heat stabilizer, manufactured by Brügmann, brand name H318;

[0035] Colorant, manufactured by Gaolai, brand name N1033;

[0036] PA1012 high viscosity resin, manufactured by Shandong Dongchen, brand name PA1012 high viscosity, relative viscosity is 6;

[0037] The compatibilizer is manufactured by Nengzhiguang and its brand name is X-042.

[0038] The epoxy resin is manufactured by Baling Petrochemical and its grade is 6101.

[0039] Nylon hot melt adhesive, manufactured by Nantong Xiexin, brand name PA801;

[0040] The TPE resin has a hardness of 68A, and preferably has a 200H compressive strain rate of less than 2% under conditions of 110℃ and 1.8kN.

[0041] All materials are commercially available, commonly used products.

[0042] It is understood that the above-mentioned raw materials and reagents are merely examples of some specific embodiments of the present invention, making the technical solution of the present invention clearer, and do not mean that the present invention can only use the above-mentioned reagents. The specific scope shall be determined by the claims. In addition, unless otherwise specified, "parts" in the examples and comparative examples refer to parts by weight.

[0043] Any range described in this invention includes the endpoint, any value between the endpoints, and any subrange consisting of the endpoint or any value between the endpoints.

[0044] Example 1

[0045] (1) Weighing: First, dry PA1012 high viscosity resin at 80℃ for 4 hours for later use; then weigh each raw material: 5 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 10 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 77.2 parts PA1012 high viscosity resin;

[0046] (2) Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin and colorant to the high speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0047] (3) Melt extrusion: The mixture is added to a twin-screw extruder. The temperature of the twin-screw extruder from the first zone to the die head is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0048] (4) Extrusion pelleting: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank and packaged to obtain the finished product, namely long carbon chain nylon material.

[0049] Example 2

[0050] Weighing: First, dry the PA1012 high viscosity resin at 80℃ for 4 hours for later use. Then weigh the following raw materials: 9 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 6 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 77.2 parts PA1012 high viscosity resin.

[0051] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0052] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0053] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0054] Example 3

[0055] Weighing: First, dry PA1012 high viscosity resin at 80℃ for 4 hours for later use; then weigh the following raw materials: 12 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 3 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 77.2 parts PA1012 high viscosity resin.

[0056] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0057] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0058] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0059] Example 4

[0060] First, dry the PA1012 high-viscosity resin at 80℃ for 4 hours for later use. Then weigh the following raw materials: 7 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 5 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 80.2 parts PA1012 high-viscosity resin.

[0061] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0062] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0063] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0064] Comparative Example 1

[0065] Weighing: First, dry PA1012 high viscosity resin at 80℃ for 4 hours for later use; then weigh the following raw materials: 5 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 10 parts epoxy resin, 1.5 parts colorant, and 82.2 parts PA1012 high viscosity resin.

[0066] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0067] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0068] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0069] Comparative Example 2

[0070] Weighing: First, dry the PA1012 high-viscosity resin at 80℃ for 4 hours for later use; then weigh the following raw materials: 3 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 13 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 76.2 parts PA1012 high-viscosity resin.

[0071] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0072] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0073] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0074] Comparative Example 3

[0075] Weighing: First, dry PA1012 high viscosity resin at 80℃ for 4 hours for later use; then weigh the following raw materials: 12 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 2 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 78.2 parts PA1012 high viscosity resin.

[0076] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0077] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0078] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0079] Comparative Example 4

[0080] First, dry the PA1012 high-viscosity resin at 80℃ for 4 hours for later use. Then weigh the following raw materials: 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 5 parts epoxy resin, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 87.2 parts PA1012 high-viscosity resin.

[0081] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0082] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0083] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0084] Comparative Example 5

[0085] First, dry the PA1012 high-viscosity resin at 80℃ for 4 hours for later use. Then weigh the following raw materials: 7 parts compatibilizer, 0.5 parts lubricant, 0.3 parts main antioxidant, 0.2 parts auxiliary antioxidant, 0.3 parts heat stabilizer, 5 parts nylon hot melt adhesive, 1.5 parts colorant, and 85.2 parts PA1012 high-viscosity resin.

[0086] Mixing: Add the weighed PA1012 high viscosity resin, compatibilizer, epoxy resin, and colorant to a high-speed mixer and mix at high speed for 5 minutes. Then add the weighed nylon hot melt adhesive, lubricant, main antioxidant, auxiliary antioxidant, and heat stabilizer and continue to mix at high speed for 5 minutes to obtain the mixture.

[0087] Melt extrusion: The mixture is added to a twin-screw extruder, the temperature of which, from the first zone to the die head, is 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feed rate is 35-45 rpm. minute.

[0088] Extrusion pelletizing: The extruded material is cooled, dried, pelletized, passed through a vibrating screen, homogenized in a homogenizing tank, and packaged to obtain the finished product, namely long carbon chain nylon material.

[0089] The long-chain nylon materials prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to performance tests. The test results are shown in Table 1, and the performance test methods and conditions are shown in Table 2.

[0090] Table 1

[0091]

[0092] Table 2

[0093]

[0094] Adhesion assessment: After long-chain nylon and TPE are co-extruded into tubes (inner layer thickness 1.5mm, outer layer thickness 1mm), thin ring samples are cut at 300mm intervals. 20 samples are taken and the interface adhesion between the inner and outer layers is observed under a 200x microscope. If any separation can be observed, it is considered unqualified and will not proceed to the next test. The pass rate is required to be 100%.

[0095] The "double 85" test refers to an aging test conducted on a sample under specific high temperature and high humidity conditions: temperature: 85℃, humidity: 85%RH (relative humidity), test time: 1000 hours, and observation of the separation of the inner and outer layers under a microscope. Separation is considered a failure.

[0096] Ten samples that pass the initial adhesion test are taken for a double "85" long-cycle test. After the test, the bonding test of the inner and outer layer interfaces is carried out in the same way as above, and the pass rate is required to be 100%.

[0097] As shown in Table 1, Examples 1-3 used materials composed of PA1012 high-viscosity resin, epoxy resin, nylon hot melt adhesive and compatibilizer. The extrusion was successful. However, since epoxy resin has a great influence on the flowability of the material, as the proportion of epoxy resin increases, the flowability of the resin decreases during the extrusion process, and the material strip swells.

[0098] As can be seen from the test results of Examples 1-3 in Table 1, both compatibilizer and epoxy resin help improve the interfacial adhesion of the material and have a certain synergistic effect. If the proportion of compatibilizer is too small, the adhesion effect is not good. If the proportion of compatibilizer is too large, the material is too soft, making it difficult to form during the extrusion process and the fusion at the weld line is not very good.

[0099] As shown in Table 1, the test results of Examples 1-3 indicate that the greater the amount of compatibilizer added, the higher the material impact, the better the low-temperature resistance, and the better the tube flexibility. However, the tensile strength of the material decreases, which may affect the burst pressure of the tube.

[0100] As shown in Table 1, the test results of Comparative Example 1 indicate that nylon hot melt adhesive greatly improves the moisture and heat resistance of the material. The pass rate of the material without nylon hot melt adhesive decreased from 100% to 35% after the double "85" test.

[0101] As shown in Table 1, the test results of Comparative Example 2 indicate that when the amount of epoxy resin added reaches 13%, the resin viscosity increases, the strip expands after exiting the extruder, the strip breakage phenomenon is serious, and the extrusion fails.

[0102] As shown in Table 1, Comparative Example 3, when the amount of epoxy resin added is lower than a certain proportion, the interfacial activity of nylon is insufficient, the adhesion between nylon and TPE is relatively poor, and there are many places on the pipe where the resin cannot be adhered.

[0103] Based on Examples 4 and Comparative Examples 4 and 5, the compatibilizer and epoxy resin exhibit a certain synergistic effect. Using either alone is insufficient for interfacial activity, and the bonding effect does not meet requirements. This is mainly because the maleic anhydride groups in the compatibilizer have a certain polarity, and the ether bonds and hydroxyl groups in the epoxy resin are also strongly polar groups. These polar groups can provide more branching, thereby improving the wettability and adhesion of the material. Simultaneously, the epoxy groups in the epoxy resin can form more stable chemical bonds with the anhydride groups, further enhancing the material's adhesion.

[0104] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0105] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A long-chain carbon nylon material resistant to double 85, characterized in that, It is prepared from the following components in the following mass percentages: Compatibilizer 5-12%, Epoxy resin 3-10%, Nylon hot melt adhesive 3-10%, Colorant 1-3%, Antioxidant 0.2-1%, Lubricant 0.2-0.7%, Heat stabilizer 0.2-0.5%, Polyamide resin balance; The aforementioned long-chain carbon nylon material resistant to double 85 is used to prepare a double-layer co-extruded material, which includes an inner tube and an outer tube. The inner tube is made of the aforementioned long-chain carbon nylon material, and the outer tube is made of TPE resin. The compatibilizer is one or more of grafted POE, grafted EPDM, grafted PP and grafted SEBS.

2. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The lubricant is at least one of PETS, OP wax, silicone, and mesoamide.

3. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The antioxidant includes a primary antioxidant and a secondary antioxidant. The primary antioxidant is at least one of antioxidant 245, antioxidant 1010, antioxidant 1098, and antioxidant 9228. The secondary antioxidant is at least one of antioxidant 168 and antioxidant 626.

4. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The heat stabilizer is at least one of the following: inorganic copper salt nylon heat stabilizer, organic copper salt nylon heat stabilizer, inorganic phosphate nylon heat stabilizer, and a compound heat stabilizer of aluminum silicate treated with titanate and dipentaerythritol (3-(3,5-tert-butyl-4-hydroxyphenyl)propionate).

5. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The polyamide resin is PA1012 high-viscosity resin with a relative viscosity of 4-8.

6. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The colorant is at least one of nylon-carrier aniline black masterbatch and PE-carrier black masterbatch.

7. The long-chain carbon nylon material resistant to double 85 according to claim 1, characterized in that, The TPE resin has a hardness of 65-70 and a compressive strength of less than 2% over 200 hours at 110°C and 1.8 kN.

8. The method for preparing the long-chain carbon nylon material resistant to double 85 as described in any one of claims 1-7, characterized in that, Includes the following steps: Weigh each component according to the mass percentage, mix the polyamide resin, compatibilizer, epoxy resin and colorant evenly, then add lubricant, antioxidant, heat stabilizer and nylon hot melt adhesive powder and mix evenly to obtain the mixture; The mixture is added to the main feed port of a twin-screw extruder, and after melting, extrusion, cooling, air drying and pelletizing, an extrusion-grade long carbon chain nylon material resistant to double 85 adhesive TPE is obtained. The temperatures of the twin-screw extruder, from the first zone to the die head, are 210℃, 225℃, 230℃, 235℃, 240℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃, 245℃; the screw speed is 400 rpm, and the feeding speed is 35-45 rpm. point.

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