Tear-resistant polyester woven belt and preparation method thereof

Abstract

The invention discloses a tear-resistant polyester woven belt and a preparation method thereof, and relates to the technical field of polyester materials. The reinforcing agent is added into the preparation formula of the polyester woven belt, so that the strength, toughness and tear resistance of the polyester woven belt are remarkably enhanced on the premise of ensuring the processability of the material, the defect of poor performance of a single material is overcome, and the comprehensive performance of the polyester material is improved; in the subsequent melting and mixing process of the reinforcing agent and the PET master batch, active groups in the reinforcing agent can be further crosslinked with the PET master batch through ester exchange, so that the strength and toughness of the polyester woven belt are improved, the propagation of microcracks is effectively hindered, and the tear resistance is improved; the reinforcing agent used in the invention can enhance the durability and stability of the polyester woven belt; and the strength and tear resistance of the woven belt are further improved by treating the woven belt primary product with the impregnation liquid.

Description

Technical Field

[0001] This invention relates to the field of polyester material technology, specifically to a tear-resistant polyester braided tape and its preparation method. Background Technology

[0002] Polyester braided tape is a narrow or tubular fabric made from polyester fibers. Due to its high strength, abrasion resistance, and corrosion resistance, it is widely used in clothing, footwear, bags, industrial binding, transportation, and other fields. However, as the performance requirements for materials become increasingly stringent, traditional polyester braided tape is prone to problems such as localized tearing, pilling, fraying, or permanent deformation in complex operating environments, such as high-frequency friction, lateral pulling, and scratching by sharp objects. This leads to decreased strength and shortened lifespan.

[0003] Existing polyester braided tapes utilize techniques such as blending and multi-layer structures to combine various fiber materials. However, they still suffer from drawbacks such as insufficient toughness, high rigidity, insufficient ductility, and weak interfacial bonding between different materials, limiting their applications. Therefore, this invention proposes a tear-resistant polyester braided tape and its preparation method to solve the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a tear-resistant polyester braided tape and its preparation method, so as to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A method for preparing a tear-resistant polyester braided tape includes the following steps: S1: PET masterbatch, reinforcing agent, toughening agent, flame retardant and antioxidant are melt-mixed and then sequentially spun and woven to obtain the initial woven tape; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape.

[0006] Furthermore, in step S1, the initial woven tape comprises the following components by weight: 50-60 parts PET masterbatch, 10-20 parts reinforcing agent, 5-10 parts toughening agent, 1-5 parts flame retardant, and 0.05-0.1 parts antioxidant.

[0007] Furthermore, in step S1, the specific process of melt mixing is as follows: mix the PET masterbatch with the reinforcing agent, heat to 190~200℃, stir evenly, then add the toughening agent, flame retardant and antioxidant, heat to 260~280℃, and mix evenly.

[0008] Furthermore, the spinning process conditions are as follows: spinning speed is 800~900m / min, and cooling airflow speed is 5~6m / s.

[0009] Furthermore, the toughening agent is polyethylene grafted maleic anhydride (PE-g-MAH).

[0010] Furthermore, the flame retardant is a cyclic phosphate flame retardant.

[0011] Furthermore, the antioxidant is a phenolic antioxidant.

[0012] Furthermore, the reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at low temperature. Then raise the temperature and maintain the temperature to continue the reaction. After the reaction is completed, filter and dry to obtain the imide monomer. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and catalyst to a reaction vessel, stir evenly under a nitrogen atmosphere, heat to react, and then cool to obtain the reinforcing agent.

[0013] Furthermore, in step one, the process conditions for the low-temperature reaction are: reacting at a temperature of 0~10℃ for 3~5 hours; the process conditions for the heating process are: heating to 130~150℃ and holding the temperature for 3~6 hours.

[0014] Furthermore, in step two, the process conditions for the heating reaction are: reacting at a temperature of 110~180℃ for 2~4 hours.

[0015] In the above technical solution, by adding a reinforcing agent to the polyester braided tape preparation formula, the strength, toughness, and tear resistance of the polyester braided tape are significantly enhanced while ensuring the material's processing performance. This overcomes the performance shortcomings of a single material and improves the overall performance of the polyester material. In the preparation process of the reinforcing agent, excess 4,4'-oxydiphthalic anhydride reacts with diamine to generate an imide monomer with a carboxyl group at the end, which also contains flexible ether bonds. The imide monomer participates in the polymerization reaction of 2,6-naphthalenedicarboxylic acid, terephthalic acid, and 4-methyl-1,2-cyclohexanediethanol through the carboxyl group at the end, obtaining a polyester oligomer containing naphthalene rings, methyl groups, cyclohexane, etc., which serves as the reinforcing agent.

[0016] During the subsequent melting and mixing of the reinforcing agent and PET masterbatch, the active groups in the reinforcing agent can further crosslink with the PET masterbatch through transesterification, improving the strength and toughness of the polyester braided tape, effectively hindering the propagation of microcracks, and enhancing tear resistance. The reinforcing agent of this invention can enhance the durability and stability of the polyester braided tape. Combined with PE-g-MAH, it produces a synergistic toughening effect, significantly improving the toughness and wear resistance of the material, enabling the braided tape to resist wear, tear, and other damage in complex usage environments. In addition, it improves the compatibility between the PET masterbatch and the reinforcing agent, allowing the reinforcing agent, flame retardant, and antioxidant to be more evenly dispersed in the matrix. The antioxidant can effectively inhibit the thermo-oxidative aging of the PET masterbatch and prevent molecular chain degradation, thereby maintaining its mechanical strength and toughness for a long time and extending the service life of the polyester braided tape. The flame retardant improves the safety of the material in high-temperature or open-flame environments.

[0017] Furthermore, in step one, the mass ratio of 4,4'-oxophthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is (5~10):(2~3):(0.1~0.5):(50~55).

[0018] Furthermore, in step two, the reinforcing agent comprises the following components by mass: 20-30 parts of 2,6-naphthalenedicarboxylic acid, 40-60 parts of terephthalic acid, 30-40 parts of 4-methyl-1,2-cyclohexanediol, 5-10 parts of imide monomer, and 0.5-1 part of catalyst.

[0019] Furthermore, the catalyst is zinc acetate.

[0020] Furthermore, the impregnation solution is prepared by the following process: Phenolic resin and butyl epoxide fatty acid ester are added to n-butanol and stirred evenly to obtain an impregnation solution.

[0021] Furthermore, the mass ratio of phenolic resin, butyl epoxide fatty acid ester, and n-butanol is (1~2):(0.5~0.8):(20~25).

[0022] Furthermore, the specific process of the impregnation liquid treatment is as follows: the raw woven belt is immersed in the impregnation liquid, the impregnation temperature is set to 70~80℃, the impregnation time is 25~30 minutes, the belt is taken out, drained, washed with n-butanol to remove residual impregnation liquid, and dried at 118~120℃ for 2~4 hours.

[0023] Furthermore, the ratio of the initial woven tape to the impregnating liquid is 1:(30~40).

[0024] Furthermore, the amount of adhesive applied by the impregnation liquid is 10-20%.

[0025] In the above technical solution, the present invention uses impregnation liquid treatment and epoxy fatty acid butyl ester as a bridge to bond phenolic resin to the surface of the woven belt, thereby further improving the strength and tear resistance of the woven belt; in addition, it makes the impregnation effect of phenolic resin more uniform, improves the compatibility between phenolic resin and polyester woven belt, increases strength and toughness, and extends the service life of the woven belt.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention significantly enhances the strength, toughness, and tear resistance of polyester braided tape by adding a reinforcing agent to the preparation formula of polyester braided tape, while ensuring the material's processing performance. This overcomes the performance limitations of single materials and improves the overall performance of polyester materials.

[0027] 2. During the subsequent melt mixing process with PET masterbatch, the active groups in the reinforcing agent of the present invention can further crosslink with PET masterbatch through ester exchange, thereby improving the strength and toughness of polyester braided tape, effectively hindering the propagation of microcracks, and enhancing tear resistance; the reinforcing agent of the present invention can enhance the durability and stability of polyester braided tape.

[0028] 3. This invention uses an impregnation solution of phenolic resin and butyl epoxide fatty acid to impregnate the raw material on the woven tape, allowing it to penetrate into the gaps between the polyester fibers and produce a cross-linking reaction. The butyl epoxide fatty acid acts as a bridge, bonding the phenolic resin to the surface of the woven tape, further improving the strength and tear resistance of the woven tape. In addition, it makes the impregnation effect of the phenolic resin more uniform, improves the compatibility between the phenolic resin and the polyester woven tape, increases the strength and toughness, and extends the service life of the woven tape. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the following specific embodiments, unless otherwise specified, the number of “parts” refers to parts by mass; Flame retardant, model LT-F01; Antioxidant, model CYANOX 1790; Toughening agent, polyethylene grafted maleic anhydride (PE-g-MAH), grade BM-310; Phenolic resin, model HK6560; Epoxy fatty acid butyl ester, epoxy value ≥4.0%, viscosity 18.3 mPa.s; PET masterbatch, grade FE19051 BK507. Example

[0031] A method for preparing a tear-resistant polyester braided tape includes the following steps: S1: Mix PET masterbatch with reinforcing agent, heat to 195℃, stir evenly, then add toughening agent, flame retardant and antioxidant, heat to 265℃, melt and mix, and then spin and weave to obtain the initial woven tape; the spinning speed is 800m / min, and the cooling airflow speed is 5m / s; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape; The specific process for impregnation is as follows: the raw woven tape is immersed in the impregnation solution at a temperature of 70°C for 25 minutes, then removed, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118°C for 2 hours; the ratio of the raw woven tape to the impregnation solution is 1:30; the amount of adhesive applied by the impregnation solution is 10%. The initial product of the woven tape includes the following components by weight: 50 parts PET masterbatch, 10 parts reinforcing agent, 5 parts toughening agent, 1 part flame retardant, and 0.05 parts antioxidant; The reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at 0°C for 3 hours. Then raise the temperature to 130°C and keep it at that temperature for 3 hours. After the reaction is complete, filter and dry to obtain the imide monomer. The mass ratio of 4,4'-oxophthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is 5:2:0.1:50. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and zinc acetate to the reaction vessel, stir evenly under a nitrogen atmosphere, react at 120°C for 2 hours, and cool to room temperature to obtain the reinforcing agent. The reinforcing agent comprises the following components by weight: 20 parts 2,6-naphthalenedicarboxylic acid, 40 parts terephthalic acid, 30 parts 4-methyl-1,2-cyclohexanediol, 5 parts imide monomer, and 0.5 parts zinc acetate; The impregnation solution is prepared by the following process: Phenolic resin and butyl epoxide were added to n-butanol and stirred until homogeneous to obtain an impregnation solution; the mass ratio of phenolic resin, butyl epoxide, and n-butanol was 1:0.5:20. Example

[0032] A method for preparing a tear-resistant polyester braided tape includes the following steps: S1: Mix PET masterbatch with reinforcing agent, heat to 195℃, stir evenly, then add toughening agent, flame retardant and antioxidant, heat to 265℃, melt and mix, and then successively spin and weave to obtain the initial woven tape; the spinning speed is 850m / min, and the cooling airflow speed is 5m / s; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape; The specific process for impregnation is as follows: the raw woven tape is immersed in the impregnation solution at a temperature of 75°C for 25 minutes, then removed, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118°C for 3 hours; the ratio of the raw woven tape to the impregnation solution is 1:35; the amount of adhesive applied by the impregnation solution is 15%. The initial product of the woven tape includes the following components by weight: 55 parts PET masterbatch, 10 parts reinforcing agent, 8 parts toughening agent, 3 parts flame retardant, and 0.08 parts antioxidant; The reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at 3°C ​​for 4 hours. Then raise the temperature to 130°C and maintain the temperature for 3 hours. After the reaction is complete, filter and dry to obtain the imide monomer. The mass ratio of 4,4'-oxophthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is 8:2.5:0.3:53. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and zinc acetate to the reaction vessel, stir evenly under a nitrogen atmosphere, react at 150°C for 2 hours, and cool to room temperature to obtain the reinforcing agent; The reinforcing agent comprises the following components by weight: 25 parts 2,6-naphthalenedicarboxylic acid, 50 parts terephthalic acid, 35 parts 4-methyl-1,2-cyclohexanediol, 8 parts imide monomer, and 0.8 parts zinc acetate; The impregnation solution is prepared by the following process: Phenolic resin and butyl epoxide were added to n-butanol and stirred until homogeneous to obtain an impregnation solution; the mass ratio of phenolic resin, butyl epoxide, and n-butanol was 1.5:0.6:25. Example

[0033] A method for preparing a tear-resistant polyester braided tape includes the following steps: S1: Mix PET masterbatch with reinforcing agent, heat to 195℃, stir evenly, then add toughening agent, flame retardant and antioxidant, heat to 265℃, melt and mix, and then spin and weave to obtain the initial woven tape; the spinning speed is 900m / min, and the cooling airflow speed is 6m / s; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape; The specific process for impregnation is as follows: the raw woven tape is immersed in the impregnation solution at a temperature of 80°C for 30 minutes, then removed, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118°C for 4 hours; the ratio of the raw woven tape to the impregnation solution is 1:40; the amount of adhesive applied by the impregnation solution is 20%. The initial product of the woven tape includes the following components by weight: 60 parts PET masterbatch, 20 parts reinforcing agent, 10 parts toughening agent, 5 parts flame retardant, and 0.1 parts antioxidant; The reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at 5°C for 3 hours. Then raise the temperature to 130°C and maintain the temperature for 3 hours. After the reaction is complete, filter and dry to obtain the imide monomer. The mass ratio of 4,4'-oxophthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is 10:3:0.5:55. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and zinc acetate to the reaction vessel, stir evenly under a nitrogen atmosphere, react at 180°C for 2 hours, and cool to room temperature to obtain the reinforcing agent. The reinforcing agent comprises the following components by weight: 30 parts 2,6-naphthalenedicarboxylic acid, 60 parts terephthalic acid, 40 parts 4-methyl-1,2-cyclohexanediol, 10 parts imide monomer, and 1 part zinc acetate; The impregnation solution is prepared by the following process: Phenolic resin and butyl epoxide were added to n-butanol and stirred until homogeneous to obtain an impregnation solution; the mass ratio of phenolic resin, butyl epoxide, and n-butanol was 2:0.8:20.

[0034] Comparative Example 1: A method for preparing a polyester braided tape includes the following steps: S1: PET masterbatch, toughening agent, flame retardant and antioxidant are melt-mixed and then sequentially spun and woven to obtain the initial woven tape; the spinning speed is 800m / min and the cooling airflow speed is 5m / s; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape; The specific process for impregnation is as follows: the raw woven tape is immersed in the impregnation solution at a temperature of 70°C for 25 minutes, then removed, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118°C for 2 hours; the ratio of the raw woven tape to the impregnation solution is 1:30; the amount of adhesive applied by the impregnation solution is 10%. The initial product of the woven tape includes the following components by weight: 70 parts PET masterbatch, 20 parts toughening agent, 1 part flame retardant, and 0.05 parts antioxidant; The impregnation solution is prepared by the following process: Phenolic resin and butyl epoxide were added to n-butanol and stirred until homogeneous to obtain an impregnation solution; the mass ratio of phenolic resin, butyl epoxide, and n-butanol was 1:0.5:25.

[0035] Comparative Example 2: A method for preparing a polyester braided tape includes the following steps: PET masterbatch, reinforcing agent, toughening agent, flame retardant, and antioxidant are melt-mixed and then sequentially spun and woven to obtain a woven tape; the spinning speed is 800 m / min and the cooling airflow speed is 5 m / s; The reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at 0°C for 3 hours. Then raise the temperature to 130°C and maintain the temperature for 3 hours. After the reaction is complete, filter and dry to obtain the imide monomer. The mass ratio of 4,4'-oxophthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is 5:2:0.1:50. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and zinc acetate to the reaction vessel, stir evenly under a nitrogen atmosphere, react at 120°C for 2 hours, cool, and obtain the reinforcing agent; The reinforcing agent comprises the following components by weight: 20 parts 2,6-naphthalenedicarboxylic acid, 40 parts terephthalic acid, 30 parts 4-methyl-1,2-cyclohexanediol, 5 parts imide monomer, and 0.5 parts zinc acetate.

[0036] Comparative Example 3: A method for preparing a polyester braided tape includes the following steps: S1: PET masterbatch, toughening agent, flame retardant and antioxidant are melt-mixed and then sequentially spun and woven to obtain the initial woven tape; the spinning speed is 800m / min and the cooling airflow speed is 5m / s; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape; The specific process for impregnation is as follows: the raw woven tape is immersed in the impregnation solution at a temperature of 70°C for 25 minutes, then removed, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118°C for 2 hours; the ratio of the raw woven tape to the impregnation solution is 1:30; the amount of adhesive applied by the impregnation solution is 10%. The initial product of the woven tape includes the following components by weight: 70 parts PET masterbatch, 20 parts toughening agent, 1 part flame retardant, and 0.05 parts antioxidant; The impregnation solution is prepared by ethylenediamine and n-butanol, with a volume ratio of ethylenediamine to n-butanol of 3:5.

[0037] Comparative Example 4: A method for preparing a polyester braided tape includes the following steps: PET masterbatch, toughening agent, flame retardant and antioxidant are melt-mixed and then sequentially spun and woven to obtain woven tape; the spinning speed is 800m / min and the cooling airflow speed is 5m / s; the woven tape is not immersed in impregnation solution treatment.

[0038] Comparative Example 5: This comparative example provides a method for preparing polyester braided tape. The reinforcing agent is prepared by the following process: 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediethanol and zinc acetate are added to a reaction vessel, stirred evenly under a nitrogen atmosphere, reacted at 120°C for 2 hours, and then cooled to obtain the reinforcing agent. The reinforcing agent comprises the following components by mass: 20 parts of 2,6-naphthalenedicarboxylic acid, 40 parts of terephthalic acid, 30 parts of 4-methyl-1,2-cyclohexanediethanol and 0.5 parts of zinc acetate. The remaining methods are the same as in Example 1.

[0039] experiment: Samples were prepared from the polyester woven tapes obtained in Examples 1-3 and Comparative Examples 1-5, and their properties were tested and the test results were recorded.

[0040] Fracture strength and elongation at break: GB / T 3923.1-2013 was used as the reference standard. An electronic universal testing machine was used, and the test conditions were 200 mm interval and 100 mm / min tensile speed to determine the fracture strength and elongation at break. Tear strength test: Using GB / T 3917 as the reference standard, the specimen is die-cut into a strip with a length of 200mm and a width of 50mm. Each specimen should be cut with a 100mm long slit in the middle of the width direction to obtain a trouser-shaped specimen. The tear endpoint is marked 25mm away from the uncut end in the middle of the strip. The specimen is stretched to the tear endpoint at a tensile speed of 100mm / min, and its tear strength is tested. Durability test: Using GB / T 37635-2019 as the reference standard, the two ends of the specimen were overlapped and sewn into a ring specimen with a circumference of 250 mm. The durability test was carried out using a fatigue tensile tester. The speed of the reciprocating moving table was set to 20 times / min, the stroke was 60 mm, and the number of tensile cycles was 10,000. The changes in the appearance of the specimen were observed. Table 1 Performance Comparison Table

[0041] Based on the data in the table above, the following conclusions can be clearly drawn: The tear-resistant polyester woven tapes obtained in Examples 1-3 are compared with the woven bags obtained in Comparative Examples 1-5. The test results show that: A comparison of Examples 1-3 with the comparative examples shows that the polyester braided tape of the present invention has excellent breaking strength, breaking elongation, tear strength, and durability, which are superior to ordinary polyester braided tape. The present invention improves the strength and toughness of polyester braided tape through the process of preparing PET masterbatch and impregnation treatment; by utilizing the imide structure generated by the reaction of acid anhydride and amino groups, the imide structure is embedded as a rigid structure into the PET main chain during the polycondensation process, and produces a synergistic toughening effect with the toughening agent polyethylene grafted with maleic anhydride, so that the braided tape can resist wear, tear and other damage in complex use environments, thereby enhancing the strength and tear resistance of the polyester braided tape.

[0042] Comparing Example 1 with Comparative Example 1, the polyester braided tape obtained in Comparative Example 1, which does not contain any reinforcing agent, showed a significant decrease in breaking strength, elongation at break, and tear strength, and exhibited filament leakage in the durability test, demonstrating the technical advantages of the PET masterbatch preparation process in this invention.

[0043] Comparing Example 1 with Comparative Example 2, the polyester braided tape obtained in Comparative Example 2, without impregnation treatment, showed a decrease in breaking strength, elongation at break, and tear strength. It can be seen that impregnation treatment can not only increase the strength of the polyester braided tape but also improve its toughness, demonstrating the technical advantage of the present invention in synergistically improving the strength and toughness of polyester braided tape and extending its service life through phenolic resin impregnation.

[0044] Comparing Example 1 with Comparative Example 3, the polyester braided tape obtained in Comparative Example 3, without the addition of reinforcing agents and impregnated with ethylenediamine and n-butanol, showed a certain improvement in the tear resistance and durability of the polyester braided tape compared to Comparative Example 4, which did not add reinforcing agents or use phenolic resin treatment. However, the effect was not as good as that of the present invention. This demonstrates the technical advantage of the present invention in synergistically improving the tear resistance of polyester braided tape by improving the PET masterbatch formulation and using phenolic resin impregnation treatment.

[0045] Comparing Example 1 with Comparative Example 5, the polyester braided tape obtained in Comparative Example 5, which does not contain imide monomers in its reinforcing agent, has a certain improvement in the tear resistance of the polyester braided tape compared to Comparative Example 2, but the effect is not as good as that of the present invention. In the durability test, local bending deformation was observed, which reflects the technical advantages of the reinforcing agent preparation process of the present invention.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A method for preparing a tear-resistant polyester braided tape, characterized in that: Includes the following steps: S1: PET masterbatch, reinforcing agent, toughening agent, flame retardant and antioxidant are melt-mixed and then sequentially spun and woven to obtain the initial woven tape; S2: Immerse the initial braided tape in an impregnation solution to obtain tear-resistant polyester braided tape.

2. The method for preparing a tear-resistant polyester braided tape according to claim 1, characterized in that: The reinforcing agent is prepared by the following process: Step 1: Add 4,4'-oxophthalic anhydride and 1,4-cyclohexanediamine to N,N-dimethylformamide and mix well. Add triethylamine and react at low temperature. Then raise the temperature and maintain the temperature to continue the reaction. After the reaction is completed, filter and dry to obtain the imide monomer. Step 2: Add 2,6-naphthalenedicarboxylic acid, terephthalic acid, 4-methyl-1,2-cyclohexanediol, imide monomer, and catalyst to a reaction vessel, stir evenly under a nitrogen atmosphere, heat to react, and then cool to obtain the reinforcing agent.

3. The method for preparing a tear-resistant polyester braided tape according to claim 1, characterized in that: The impregnation solution is prepared by the following process: adding phenolic resin and butyl epoxide fatty acid to n-butanol and stirring evenly to obtain the impregnation solution.

4. The method for preparing a tear-resistant polyester braided tape according to claim 1, characterized in that: The specific process of the impregnation solution treatment is as follows: the raw woven belt is immersed in the impregnation solution, the impregnation temperature is set to 70~80℃, and the immersion time is 25~30 minutes. After immersion, the belt is taken out, drained, washed with n-butanol to remove residual impregnation solution, and dried at 118~120℃ for 2~4 hours.

5. The method for preparing a tear-resistant polyester braided tape according to claim 1, characterized in that: In step S1, the initial woven tape product includes the following components by weight: 50-60 parts PET masterbatch, 10-20 parts reinforcing agent, 5-10 parts toughening agent, 1-5 parts flame retardant, and 0.05-0.1 parts antioxidant.

6. The method for preparing a tear-resistant polyester braided tape according to claim 2, characterized in that: In step one, the mass ratio of 4,4'-oxybisphthalic anhydride, 1,4-cyclohexanediamine, triethylamine, and N,N-dimethylformamide is (5~10):(2~3):(0.1~0.5):(50~55).

7. The method for preparing a tear-resistant polyester braided tape according to claim 2, characterized in that: In step two, the reinforcing agent comprises the following components by mass: 20-30 parts of 2,6-naphthalenedicarboxylic acid, 40-60 parts of terephthalic acid, 30-40 parts of 4-methyl-1,2-cyclohexanediol, 5-10 parts of imide monomer, and 0.5-1 part of catalyst.

8. The method for preparing a tear-resistant polyester braided tape according to claim 1, characterized in that: The ratio of the initial braided tape to the impregnating liquid is 1:(30~40); the amount of adhesive applied by the impregnating liquid is 10~20%.

9. The method for preparing a tear-resistant polyester braided tape according to claim 5, characterized in that: The toughening agent is polyethylene grafted with maleic anhydride; the flame retardant is a cyclic phosphate flame retardant; and the antioxidant is a phenolic antioxidant.

10. A tear-resistant polyester braided tape, characterized in that: It is produced by the manufacturing process according to any one of claims 1-9.

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