Anti-tear protective fabric and preparation process thereof

Abstract

The invention discloses a protective fabric with tear resistance and a preparation process thereof. According to the invention, through the three-layer structural design of the inner comfortable layer, the middle protective layer and the outer protective layer, performance optimization of the fabric in multiple aspects is realized. The inner comfortable layer is made of the polyester fibers and the spandex fibers, and the moisture-conducting and sweat-discharging auxiliaries are added, so that the softness and moisture-permeable and sweat-discharging capabilities of the contact surface of the fabric and the skin are ensured, and the comfort of a wearer is improved. The middle protective layer is combined with aramid fibers, ultra-high molecular weight polyethylene fibers, carbon fibers and a thermoplastic polyurethane film, and high-strength, impact-resistant and puncture-resistant protective performance is formed. The outer protective layer utilizes the excellent characteristics of aramid fibers and polyimide fibers, and a fireproof agent and a wear-resistant agent are added, so that the wear-resistant and fireproof capabilities of the fabric are enhanced. Due to the multi-layer composite structure, the fabric is light and convenient, has high-strength tear resistance, and meets the high-standard requirement for personal protection equipment in a complex environment.

Description

Technical Field

[0001] The invention belongs to the technical field of protective fabrics, and in particular relates to a tear-resistant protective fabric and a preparation process thereof. Background Art

[0002] With the advancement of science and technology and the development of society, personal protective equipment is increasingly used in military, firefighting, industrial and other fields. These equipment need to have high strength, impact resistance, puncture resistance, wear resistance, fire resistance and other properties to protect the wearer's personal safety. However, existing protective fabrics have certain limitations in comprehensive performance and often cannot meet the needs of multiple complex environments at the same time.

[0003] Traditional protective fabrics are mostly made of a single material or a simple composite material. Although they have certain protective properties, they are insufficient in terms of comfort, functionality and durability. For example, some fabrics are strong but have poor air permeability, which can easily cause skin discomfort after long-term wearing; other fabrics are soft and comfortable but have weak protective properties and cannot meet the requirements of use in high-risk environments. Summary of the invention

[0004] The purpose of the present invention is to provide a tear-resistant protective fabric and a preparation process thereof in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a tear-resistant protective fabric and a preparation process thereof, wherein the protective fabric comprises: a high-performance fiber-based fabric and a finishing agent,

[0006] The high-performance fiber-based fabric comprises: an inner comfort layer, a middle protection layer and an outer protection layer;

[0007] The inner comfort layer comprises: polyester fiber: 60-90 parts by weight, spandex fiber: 6-12 parts by weight, and moisture conduction and perspiration relieving agent: 0.6-1.2 parts by weight;

[0008] The middle protective layer comprises: 66.7-83.3 parts by weight of aramid fiber, 50-66.7 parts by weight of ultra-high molecular weight polyethylene fiber, 16.7-33.3 parts by weight of carbon fiber and 6.7-10 parts by weight of thermoplastic polyurethane film;

[0009] The outer protective layer comprises: aramid fiber: 60-80 parts by weight, polyimide fiber: 20-40 parts by weight, fire retardant: 2-4 parts by weight and wear resistant agent: 1.2-2 parts by weight;

[0010] The finishing agent comprises: epoxy resin: 10-15 parts by weight, polyurethane adhesive: 5-10 parts by weight, silane coupling agent: 0.5-1 parts by weight, nano titanium dioxide: 1-3 parts by weight, carbon nanotubes: 0.5-1 parts by weight, silicone oil: 1-2 parts by weight, antibacterial agent: 0.5-1 parts by weight, fire retardant: 1-3 parts by weight, antistatic agent: 1-3 parts by weight, defoaming agent: 1-2 parts by weight, curing agent: 2-4 parts by weight, and solvent: 40-60 parts by weight.

[0011] In a preferred embodiment, the preparation process thereof comprises the following steps:

[0012] S1: Raw material preparation: Ensure that all high-performance fibers and additives are ready and meet quality standards; these materials include polyester fiber, spandex fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, carbon fiber, polyimide fiber, moisture wicking additives, epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent;

[0013] S2: Preparation of inner comfort layer: polyester fiber and spandex fiber are mixed and reinforced into cloth through opening, combing and needle punching processes, followed by application of moisture-wicking additives and drying to form a soft and breathable inner comfort layer;

[0014] S3: Preparation of middle protective layer: Aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, and then the TPU film is compounded onto the fiber cloth through a thermal bonding process to form a middle protective layer with impact resistance and puncture resistance;

[0015] S4: Preparation of outer protective layer: Aramid fiber and polyimide fiber are mixed, and fiber cloth is made by opening, carding and needle punching process, fire retardant and wear resistant agent are applied, and then dried after coating or impregnation process to form a wear-resistant and fire-resistant outer protective layer;

[0016] S5: Preparation of finishing agent: epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent are mixed in proportion and stirred evenly to prepare a finishing agent;

[0017] S6: Multi-layer lamination: The inner comfort layer, the middle protection layer and the outer protection layer are laminated in sequence, the finishing agent is evenly applied on the laminated fabrics, the three layers of materials are laminated into one by a hot pressing process, and the finishing agent is cured;

[0018] S7: Post-treatment: drying the composite fabric to solidify the finishing agent, then heat setting, and finally washing the fabric to remove excess additives and solvents, and drying again;

[0019] S8: Performance testing and quality control: Test the tear strength, abrasion resistance, fire resistance, comfort, antibacterial property, antistatic property and other performance of the composite fabric, and adjust the production process according to the test results to ensure that the fabric quality meets the standards;

[0020] S9: Finished product cutting and packaging Cut the fabric to the required size and shape according to the needs, and then properly package the finished fabric for easy storage and transportation.

[0021] In a preferred embodiment, in step S1, the antibacterial agent formula includes parts by weight of chlorine-containing compounds, parts by weight of silver ions, and parts by weight of quaternary ammonium salts; the antibacterial components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the antibacterial agent is fixed on the fabric by drying or natural drying; the amount of the antibacterial agent added is 0.5%-2% of the weight of the fabric.

[0022] In a preferred embodiment, in step S1, the fire retardant formula includes parts by weight of phosphate esters, parts by weight of halogen compounds, and parts by weight of metal oxides; the fire retardant components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the fire retardant is fixed on the fabric by drying or natural drying; the amount of fire retardant added is 5%-15% of the weight of the fabric.

[0023] In a preferred embodiment, in step S1, the antistatic agent formula includes 2 parts by weight of an ionic surfactant, 2 parts by weight of a nonionic surfactant, and 2 parts by weight of a conductive polymer; the antistatic component is mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the antistatic agent is fixed on the fabric by drying or natural drying; the amount of the antistatic agent added is 1%-3% of the weight of the fabric.

[0024] In a preferred embodiment, in step S1, the defoaming agent formula includes parts by weight of silicone oil, parts by weight of mineral oil, and parts by weight of fatty acid; the defoaming components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the defoaming agent is fixed on the fabric by drying or natural drying; the amount of defoaming agent added is 0.5%-2% of the weight of the fabric.

[0025] In a preferred embodiment, in step S6, the hot pressing temperature is 150-180° C.; the hot pressing time is 2-3 minutes; the hot pressing pressure is 2-4 bar; the lamination sequence is inner comfort layer - middle protective layer - outer protective layer; specifically comprising:

[0026] S6.1: Preheating: Before applying the finishing agent, the composite fabric is preheated to a certain temperature to improve the adhesion and curing speed of the finishing agent;

[0027] S6.2: Coating: Use a roller coater to evenly coat the finishing agent on the composite fabric; during the coating process, control the speed and pressure of the roller to ensure that the finishing agent is evenly distributed on each layer of fabric;

[0028] S6.3: Curing: Put the composite fabric coated with the finishing agent into an oven for curing. During the curing process, control the oven temperature and time to ensure that the finishing agent is fully cured. After curing, take out the fabric and check the curing effect.

[0029] S6.4: Cooling: Take the cured composite fabric out of the oven and cool it naturally to room temperature;

[0030] S6.5: Check the curing effect of the composite fabric to ensure that the finish is fully cured without omissions and bubbles; if there are any problems, reapply the finish and cure it.

[0031] In a preferred embodiment, in step S4, during the preparation of the outer protective layer, the following steps are controlled:

[0032] The opening temperature is 65-70℃; the carding speed is 120-140 m / min; the needle punching depth is 1.5-2.0 mm; the drying temperature is 120-140℃; and the drying time is 4 minutes.

[0033] In a preferred embodiment, in step S2, during the preparation of the inner comfort layer, the opening temperature is controlled to be 50-60°C; the combing speed is 100-150 m / min; the needling depth is 0.5-1.0 mm; the drying temperature is 100-120°C; and the drying time is 2 to 3 minutes.

[0034] In a preferred embodiment, in the post-processing process in step S7, the composite fabric is dried to solidify the finishing agent, then subjected to heat setting treatment, and finally the fabric is washed to remove excess additives and solvents, and then dried again; this step is crucial to ensure the final performance of the fabric; the specific parameters are as follows:

[0035] The drying temperature is 120-140°C to ensure that the finishing agent is fully cured while maintaining the shape and dimensional stability of the fiber;

[0036] The drying time is 3 to 5 minutes, which can be adjusted according to the thickness and dryness of the fabric to ensure that all auxiliaries and solvents are completely removed;

[0037] The heat setting temperature is 150-170℃, and the composite fabric is heat-set to eliminate the internal stress in the fabric and improve its feel and dimensional stability;

[0038] The heat setting time is 2 to 3 minutes, which can be adjusted according to the thickness of the fabric and the heat setting effect to ensure the fabric achieves the best setting effect;

[0039] The washing temperature is 30-50℃, and a mild detergent is used to clean the fabric to avoid damage to the finishing agent and fiber;

[0040] The cleaning time is 5-10 minutes, which can be adjusted according to the degree of fabric contamination and the cleaning effect to ensure that the auxiliaries and solvents are completely removed;

[0041] The re-drying temperature is 100-120℃, and the cleaned fabric is dried again to remove residual moisture and ensure the dryness and stable performance of the fabric;

[0042] The drying time again is 1-2 minutes, which should be adjusted according to the dryness of the fabric to ensure that the fabric is completely dry without any moisture remaining.

[0043] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0044] 1. In the present invention, the three-layer structure design of the inner comfort layer, the middle protective layer and the outer protective layer is used to optimize the performance of the fabric in multiple aspects. The inner comfort layer adopts polyester fiber and spandex fiber, and adds moisture conduction and perspiration relieving agent, which ensures the softness and moisture perspiration ability of the contact surface between the fabric and the skin, and improves the comfort of the wearer. The middle protective layer combines aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber, as well as thermoplastic polyurethane film, to form high-strength, impact-resistant and puncture-resistant protective performance. The outer protective layer utilizes the excellent properties of aramid fiber and polyimide fiber, adds fire retardant and wear-resistant agent, and enhances the wear resistance and fire resistance of the fabric. This multi-layer composite structure enables the fabric to have high-strength tear resistance while maintaining lightness, meeting the high standards for personal protective equipment in complex environments.

[0045] 2. In the present invention, the finishing agent includes ingredients such as epoxy resin, polyurethane adhesive, silane coupling agent, etc., which can effectively improve the adhesion between the layers of the fabric and enhance the overall mechanical properties and stability of the fabric. The addition of nanomaterials such as nano titanium dioxide and carbon nanotubes not only improves the strength and toughness of the fabric, but also gives it certain functionality, such as antibacterial and antistatic. In addition, the reasonable ratio of fire retardants, defoamers, curing agents and solvents ensures the quality and performance of the fabric during the preparation process. Through the uniform coating and hot pressing curing of the finishing agent, the fabric can still maintain good functionality after multi-layer composite, extending the service life of the fabric and improving its adaptability and reliability under various extreme conditions. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] Embodiment 1:

[0048] A tear-resistant protective fabric and a preparation process thereof, the protective fabric comprising: a high-performance fiber-based fabric and a finishing agent,

[0049] The high-performance fiber-based fabric includes: an inner comfort layer, a middle protection layer and an outer protection layer;

[0050] The inner comfort layer includes: polyester fiber: 90 parts by weight, spandex fiber: 12 parts by weight, moisture conduction and perspiration aid: 1.2 parts by weight

[0051] The middle protective layer includes: 83.3 parts by weight of aramid fiber, 66.7 parts by weight of ultra-high molecular weight polyethylene fiber, 33.3 parts by weight of carbon fiber and 10 parts by weight of thermoplastic polyurethane film

[0052] The outer protective layer comprises: aramid fiber: 80 parts by weight, polyimide fiber: 40 parts by weight, fire retardant: 4 parts by weight and wear resistant agent: 2 parts by weight;

[0053] The finishing agent includes: epoxy resin: 15 parts by weight, polyurethane adhesive: 10 parts by weight, silane coupling agent: 1 part by weight, nano titanium dioxide: 3 parts by weight, carbon nanotubes: 1 part by weight, silicone oil: 2 parts by weight, antibacterial agent: 1 part by weight, fire retardant: 3 parts by weight, antistatic agent: 3 parts by weight, defoaming agent: 2 parts by weight, curing agent: 4 parts by weight, and solvent: 60 parts by weight.

[0054] The preparation process comprises the following steps:

[0055] S1: Raw material preparation: Ensure that all high-performance fibers and additives are ready and meet quality standards. These materials include polyester fiber, spandex fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, carbon fiber, polyimide fiber, moisture wicking additives, epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent.

[0056] S2: Preparation of inner comfort layer: Polyester fiber and spandex fiber are mixed and reinforced into cloth through opening, carding and needle punching processes, followed by application of moisture-wicking aid and drying to form a soft and breathable inner comfort layer.

[0057] S3: Preparation of middle protective layer: Aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, and then the TPU film is compounded to the fiber cloth through a thermal bonding process to form a middle protective layer with impact resistance and puncture resistance.

[0058] S4: Preparation of outer protective layer: Aramid fiber and polyimide fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, fire retardant and wear resistant agent are applied, and then dried after coating or impregnation process to form a wear-resistant and fire-resistant outer protective layer.

[0059] S5: Preparation of finishing agent: epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent are mixed in proportion and stirred evenly to prepare a finishing agent.

[0060] S6: Multi-layer composite: The inner comfort layer, the middle protective layer and the outer protective layer are stacked in sequence, the finishing agent is evenly applied on the stacked fabrics, the three layers of materials are composited into one by a hot pressing process, and the finishing agent is cured.

[0061] S7: Post-treatment: The composite fabric is dried to solidify the finishing agent, then heat-set, and finally the fabric is washed to remove excess additives and solvents, and dried again.

[0062] S8: Performance testing and quality control: Test the tear strength, abrasion resistance, fire resistance, comfort, antibacterial properties, antistatic properties and other performance of the composite fabric, and adjust the production process according to the test results to ensure that the fabric quality meets the standards.

[0063] S9: Finished product cutting and packaging Cut the fabric to the required size and shape according to the needs, and then properly package the finished fabric for easy storage and transportation.

[0064] In step S1, the antibacterial agent formula includes parts by weight of a chlorine-containing compound, parts by weight of silver ions, and parts by weight of a quaternary ammonium salt. The antibacterial component is mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the antibacterial agent is fixed on the fabric by drying or natural drying. The amount of the antibacterial agent added is 0.5%-2% of the weight of the fabric.

[0065] In step S1, the fire retardant formula includes parts by weight of phosphate esters, parts by weight of halogen compounds, and parts by weight of metal oxides. The fire retardant components are mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the fire retardant is fixed on the fabric by drying or natural drying. The amount of fire retardant added is 5%-15% of the weight of the fabric.

[0066] In step S1, the antistatic agent formula includes parts by weight of an ionic surfactant, parts by weight of a nonionic surfactant, and parts by weight of a conductive polymer. The antistatic component is mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the antistatic agent is fixed on the fabric by drying or natural drying. The amount of antistatic agent added is 1%-3% of the weight of the fabric.

[0067] In step S1, the defoamer formula includes parts by weight of silicone oil, parts by weight of mineral oil, and parts by weight of fatty acid. The defoamer components are mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the defoamer is fixed on the fabric by drying or natural drying. The amount of defoamer added is 0.5%-2% of the weight of the fabric.

[0068] In step S6, the hot pressing temperature is 150-180°C; the hot pressing time is 2-3 minutes; the hot pressing pressure is 2-4 bar; the lamination sequence is inner comfort layer - middle protection layer - outer protection layer; specifically includes:

[0069] S6.1: Preheating: Before applying the finishing agent, preheat the composite fabric to a certain temperature to improve the adhesion and curing speed of the finishing agent.

[0070] S6.2: Coating, use a roller coater to evenly coat the finishing agent on the composite fabric. During the coating process, control the speed and pressure of the roller to ensure that the finishing agent is evenly distributed on each layer of fabric.

[0071] S6.3: Curing: Put the composite fabric coated with the finishing agent into the oven for curing. During the curing process, control the oven temperature and time to ensure that the finishing agent is fully cured. After curing, take out the fabric and check the curing effect.

[0072] S6.4: Cooling: Remove the cured composite fabric from the oven and allow it to cool naturally to room temperature.

[0073] S6.5: Check the curing effect of the composite fabric to ensure that the finish is fully cured without omissions and bubbles. If there are any problems, reapply the finish and cure it.

[0074] In step S4, during the preparation of the outer protective layer, the following control is performed:

[0075] The opening temperature is 65-70℃; the carding speed is 120-140 m / min; the needle punching depth is 1.5-2.0 mm; the drying temperature is 120-140℃; and the drying time is 4 minutes.

[0076] In step S2, during the preparation of the inner comfort layer, the opening temperature is controlled to be 50-60°C; the combing speed is 100-150 m / min; the needling depth is 0.5-1.0 mm; the drying temperature is 100-120°C; and the drying time is 2-3 minutes.

[0077] Post-treatment in step S7 During the post-treatment process, the composite fabric is dried to solidify the finishing agent, then heat-set, and finally the fabric is washed to remove excess additives and solvents and dried again. This step is crucial to ensure the final performance of the fabric. The specific parameters are as follows:

[0078] The drying temperature is 120-140°C to ensure that the finishing agent is fully cured while maintaining the shape and dimensional stability of the fiber.

[0079] The drying time is 3 to 5 minutes, which is adjusted according to the thickness and dryness of the fabric to ensure that all auxiliaries and solvents are completely removed.

[0080] The heat setting temperature is 150-170°C, and the composite fabric is heat-set to eliminate the internal stress in the fabric and improve its feel and dimensional stability.

[0081] The heat setting time is 2 to 3 minutes, which is adjusted according to the thickness of the fabric and the heat setting effect to ensure that the fabric achieves the best setting effect.

[0082] The washing temperature is 30-50℃, and a mild detergent is used to clean the fabric to avoid damage to the finishing agent and fiber.

[0083] The cleaning time is 5-10 minutes, which is adjusted according to the degree of fabric contamination and the cleaning effect to ensure that the auxiliaries and solvents are completely removed.

[0084] The re-drying temperature is 100-120℃, and the cleaned fabric is dried again to remove residual moisture and ensure the dryness and stable performance of the fabric.

[0085] The drying time again is 1-2 minutes, which should be adjusted according to the dryness of the fabric to ensure that the fabric is completely dry without any moisture remaining.

[0086] In the present invention, the three-layer structure design of the inner comfort layer, the middle protective layer and the outer protective layer is used to optimize the performance of the fabric in multiple aspects. The inner comfort layer adopts polyester fiber and spandex fiber, and adds moisture conduction and perspiration relieving agent, which ensures the softness and moisture perspiration ability of the contact surface between the fabric and the skin, and improves the comfort of the wearer. The middle protective layer combines aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber, as well as thermoplastic polyurethane film, to form high-strength, impact-resistant and puncture-resistant protective performance. The outer protective layer utilizes the excellent properties of aramid fiber and polyimide fiber, adds fire retardant and wear-resistant agent, and enhances the wear resistance and fire resistance of the fabric. This multi-layer composite structure enables the fabric to have high-strength tear resistance while maintaining lightness, meeting the high standards for personal protective equipment in complex environments.

[0087] In the present invention, the finishing agent includes ingredients such as epoxy resin, polyurethane adhesive, silane coupling agent, etc., which can effectively improve the adhesion between the layers of the fabric and enhance the overall mechanical properties and stability of the fabric. The addition of nanomaterials such as nano titanium dioxide and carbon nanotubes not only improves the strength and toughness of the fabric, but also gives it certain functionality, such as antibacterial and antistatic. In addition, the reasonable ratio of fire retardants, defoamers, curing agents and solvents ensures the quality and performance of the fabric during the preparation process. Through the uniform coating and hot pressing curing of the finishing agent, the fabric can still maintain good functionality after multi-layer composite, extending the service life of the fabric and improving its adaptability and reliability under various extreme conditions.

[0088] Embodiment 2:

[0089] A tear-resistant protective fabric and a preparation process thereof, the protective fabric comprising: a high-performance fiber-based fabric and a finishing agent,

[0090] The high-performance fiber-based fabric includes: an inner comfort layer, a middle protection layer and an outer protection layer;

[0091] The inner comfort layer includes: polyester fiber: 60 parts by weight, spandex fiber: 6 parts by weight, moisture conduction and perspiration aid 0.6 parts by weight

[0092] The middle protective layer includes: 66.7 parts by weight of aramid fiber, 50 parts by weight of ultra-high molecular weight polyethylene fiber, 16.7 parts by weight of carbon fiber and 6.7 parts by weight of thermoplastic polyurethane film

[0093] The outer protective layer comprises: aramid fiber: 60 parts by weight, polyimide fiber: 20 parts by weight, fire retardant: 2 parts by weight and wear resistant agent: 1.2 parts by weight;

[0094] The finishing agent includes: epoxy resin: 10 parts by weight, polyurethane adhesive: 5 parts by weight, silane coupling agent: 0.5 parts by weight, nano titanium dioxide: 1 part by weight, carbon nanotubes: 0.5 parts by weight, silicone oil: 1 part by weight, antibacterial agent: 0.5 parts by weight, fire retardant: 1 part by weight, antistatic agent: 1 part by weight, defoaming agent: 1 part by weight, curing agent: 2 parts by weight, and solvent: 40 parts by weight.

[0095] The preparation process comprises the following steps:

[0096] S1: Raw material preparation: Ensure that all high-performance fibers and additives are ready and meet quality standards. These materials include polyester fiber, spandex fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, carbon fiber, polyimide fiber, moisture wicking additives, epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent.

[0097] S2: Preparation of inner comfort layer: Polyester fiber and spandex fiber are mixed and reinforced into cloth through opening, carding and needle punching processes, followed by application of moisture-wicking aid and drying to form a soft and breathable inner comfort layer.

[0098] S3: Preparation of middle protective layer: Aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, and then the TPU film is compounded to the fiber cloth through a thermal bonding process to form a middle protective layer with impact resistance and puncture resistance.

[0099] S4: Preparation of outer protective layer: Aramid fiber and polyimide fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, fire retardant and wear resistant agent are applied, and then dried after coating or impregnation process to form a wear-resistant and fire-resistant outer protective layer.

[0100] S5: Preparation of finishing agent: epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent are mixed in proportion and stirred evenly to prepare a finishing agent.

[0101] S6: Multi-layer composite: The inner comfort layer, the middle protective layer and the outer protective layer are stacked in sequence, the finishing agent is evenly applied on the stacked fabrics, the three layers of materials are composited into one by a hot pressing process, and the finishing agent is cured.

[0102] S7: Post-treatment: The composite fabric is dried to solidify the finishing agent, then heat-set, and finally the fabric is washed to remove excess additives and solvents, and dried again.

[0103] S8: Performance testing and quality control: Test the tear strength, abrasion resistance, fire resistance, comfort, antibacterial properties, antistatic properties and other performance of the composite fabric, and adjust the production process according to the test results to ensure that the fabric quality meets the standards.

[0104] S9: Finished product cutting and packaging Cut the fabric to the required size and shape according to the needs, and then properly package the finished fabric for easy storage and transportation.

[0105] In step S1, the antibacterial agent formula includes parts by weight of a chlorine-containing compound, parts by weight of silver ions, and parts by weight of a quaternary ammonium salt. The antibacterial component is mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the antibacterial agent is fixed on the fabric by drying or natural drying. The amount of the antibacterial agent added is 0.5%-2% of the weight of the fabric.

[0106] In step S1, the fire retardant formula includes parts by weight of phosphate esters, parts by weight of halogen compounds, and parts by weight of metal oxides. The fire retardant components are mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the fire retardant is fixed on the fabric by drying or natural drying. The amount of fire retardant added is 5%-15% of the weight of the fabric.

[0107] In step S1, the antistatic agent formula includes parts by weight of an ionic surfactant, parts by weight of a nonionic surfactant, and parts by weight of a conductive polymer. The antistatic component is mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the antistatic agent is fixed on the fabric by drying or natural drying. The amount of antistatic agent added is 1%-3% of the weight of the fabric.

[0108] In step S1, the defoamer formula includes parts by weight of silicone oil, parts by weight of mineral oil, and parts by weight of fatty acid. The defoamer components are mixed with water or other solvents to form a uniform solution. Then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed. Finally, the defoamer is fixed on the fabric by drying or natural drying. The amount of defoamer added is 0.5%-2% of the weight of the fabric.

[0109] In step S6, the hot pressing temperature is 150-180°C; the hot pressing time is 2-3 minutes; the hot pressing pressure is 2-4 bar; the lamination sequence is inner comfort layer - middle protection layer - outer protection layer; specifically includes:

[0110] S6.1: Preheating: Before applying the finishing agent, preheat the composite fabric to a certain temperature to improve the adhesion and curing speed of the finishing agent.

[0111] S6.2: Coating, use a roller coater to evenly coat the finishing agent on the composite fabric. During the coating process, control the speed and pressure of the roller to ensure that the finishing agent is evenly distributed on each layer of fabric.

[0112] S6.3: Curing: Put the composite fabric coated with the finishing agent into the oven for curing. During the curing process, control the oven temperature and time to ensure that the finishing agent is fully cured. After curing, take out the fabric and check the curing effect.

[0113] S6.4: Cooling: Remove the cured composite fabric from the oven and allow it to cool naturally to room temperature.

[0114] S6.5: Check the curing effect of the composite fabric to ensure that the finish is fully cured without omissions and bubbles. If there are any problems, the finish needs to be reapplied and cured.

[0115] In step S4, during the preparation of the outer protective layer, the following control is performed:

[0116] The opening temperature is 65-70℃; the carding speed is 120-140 m / min; the needle punching depth is 1.5-2.0 mm; the drying temperature is 120-140℃; and the drying time is 4 minutes.

[0117] In step S2, during the preparation of the inner comfort layer, the opening temperature is controlled to be 50-60°C; the combing speed is 100-150 m / min; the needling depth is 0.5-1.0 mm; the drying temperature is 100-120°C; and the drying time is 2-3 minutes.

[0118] Post-treatment in step S7 During the post-treatment process, the composite fabric is dried to solidify the finishing agent, then heat-set, and finally the fabric is washed to remove excess additives and solvents and dried again. This step is crucial to ensure the final performance of the fabric. The specific parameters are as follows:

[0119] The drying temperature is 120-140°C to ensure that the finishing agent is fully cured while maintaining the shape and dimensional stability of the fiber.

[0120] The drying time is 3 to 5 minutes, which is adjusted according to the thickness and dryness of the fabric to ensure that all auxiliaries and solvents are completely removed.

[0121] The heat setting temperature is 150-170°C, and the composite fabric is heat-set to eliminate the internal stress in the fabric and improve its feel and dimensional stability.

[0122] The heat setting time is 2 to 3 minutes, which is adjusted according to the thickness of the fabric and the heat setting effect to ensure that the fabric achieves the best setting effect.

[0123] The washing temperature is 30-50℃, and a mild detergent is used to clean the fabric to avoid damage to the finishing agent and fiber.

[0124] The cleaning time is 5-10 minutes, which is adjusted according to the degree of fabric contamination and the cleaning effect to ensure that the auxiliaries and solvents are completely removed.

[0125] The re-drying temperature is 100-120℃, and the cleaned fabric is dried again to remove residual moisture and ensure the dryness and stable performance of the fabric.

[0126] The drying time again is 1-2 minutes, which should be adjusted according to the dryness of the fabric to ensure that the fabric is completely dry without any moisture remaining.

[0127] In the present invention, the three-layer structure design of the inner comfort layer, the middle protective layer and the outer protective layer is used to optimize the performance of the fabric in multiple aspects. The inner comfort layer adopts polyester fiber and spandex fiber, and adds moisture conduction and perspiration relieving agent, which ensures the softness and moisture perspiration ability of the contact surface between the fabric and the skin, and improves the comfort of the wearer. The middle protective layer combines aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber, as well as thermoplastic polyurethane film, to form high-strength, impact-resistant and puncture-resistant protective performance. The outer protective layer utilizes the excellent properties of aramid fiber and polyimide fiber, adds fire retardant and wear-resistant agent, and enhances the wear resistance and fire resistance of the fabric. This multi-layer composite structure enables the fabric to have high-strength tear resistance while maintaining lightness, meeting the high standards for personal protective equipment in complex environments.

[0128] In the present invention, the finishing agent includes ingredients such as epoxy resin, polyurethane adhesive, silane coupling agent, etc., which can effectively improve the adhesion between the layers of the fabric and enhance the overall mechanical properties and stability of the fabric. The addition of nanomaterials such as nano titanium dioxide and carbon nanotubes not only improves the strength and toughness of the fabric, but also gives it certain functionality, such as antibacterial and antistatic. In addition, the reasonable ratio of fire retardants, defoamers, curing agents and solvents ensures the quality and performance of the fabric during the preparation process. Through the uniform coating and hot pressing curing of the finishing agent, the fabric can still maintain good functionality after multi-layer composite, extending the service life of the fabric and improving its adaptability and reliability under various extreme conditions.

[0129] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0130] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tear-resistant protective fabric and a preparation process thereof, characterized in that: The protective fabric comprises: a high-performance fiber-based fabric and a finishing agent, The high-performance fiber-based fabric comprises: an inner comfort layer, a middle protection layer and an outer protection layer; The inner comfort layer comprises: polyester fiber: 60-90 parts by weight, spandex fiber: 6-12 parts by weight, and moisture conduction and perspiration relieving agent: 0.6-1.2 parts by weight; The middle protective layer comprises: 66.7-83.3 parts by weight of aramid fiber, 50-66.7 parts by weight of ultra-high molecular weight polyethylene fiber, 16.7-33.3 parts by weight of carbon fiber and 6.7-10 parts by weight of thermoplastic polyurethane film; The outer protective layer comprises: aramid fiber: 60-80 parts by weight, polyimide fiber: 20-40 parts by weight, fire retardant: 2-4 parts by weight and wear resistant agent: 1.2-2 parts by weight; The finishing agent comprises: epoxy resin: 10-15 parts by weight, polyurethane adhesive: 5-10 parts by weight, silane coupling agent: 0.5-1 parts by weight, nano titanium dioxide: 1-3 parts by weight, carbon nanotubes: 0.5-1 parts by weight, silicone oil: 1-2 parts by weight, antibacterial agent: 0.5-1 parts by weight, fire retardant: 1-3 parts by weight, antistatic agent: 1-3 parts by weight, defoaming agent: 1-2 parts by weight, curing agent: 2-4 parts by weight, and solvent: 40-60 parts by weight.

2. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: The preparation process thereof comprises the following steps: S1: Raw material preparation: Ensure that all high-performance fibers and additives are ready and meet quality standards; these materials include polyester fiber, spandex fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, carbon fiber, polyimide fiber, moisture wicking additives, epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent; S2: Preparation of inner comfort layer: polyester fiber and spandex fiber are mixed and reinforced into cloth through opening, combing and needle punching processes, followed by application of moisture-wicking additives and drying to form a soft and breathable inner comfort layer; S3: Preparation of middle protective layer: Aramid fiber, ultra-high molecular weight polyethylene fiber and carbon fiber are mixed and made into fiber cloth through opening, carding and needle punching processes, and then the TPU film is compounded onto the fiber cloth through a thermal bonding process to form a middle protective layer with impact resistance and puncture resistance; S4: Preparation of outer protective layer: Aramid fiber and polyimide fiber are mixed, and fiber cloth is made by opening, carding and needle punching process, fire retardant and wear resistant agent are applied, and then dried after coating or impregnation process to form a wear-resistant and fire-resistant outer protective layer; S5: Preparation of finishing agent: epoxy resin, polyurethane adhesive, silane coupling agent, nano titanium dioxide, carbon nanotubes, silicone oil, antibacterial agent, fire retardant, antistatic agent, defoaming agent, curing agent and solvent are mixed in proportion and stirred evenly to prepare a finishing agent; S6: Multi-layer lamination: The inner comfort layer, the middle protection layer and the outer protection layer are laminated in sequence, the finishing agent is evenly applied on the laminated fabrics, the three layers of materials are laminated into one by a hot pressing process, and the finishing agent is cured; S7: Post-treatment: drying the composite fabric to solidify the finishing agent, then heat setting, and finally washing the fabric to remove excess additives and solvents, and drying again; S8: Performance testing and quality control: Test the tear strength, abrasion resistance, fire resistance, comfort, antibacterial property, antistatic property and other performance of the composite fabric, and adjust the production process according to the test results to ensure that the fabric quality meets the standards; S9: Finished product cutting and packaging Cut the fabric to the required size and shape according to the needs, and then properly package the finished fabric for easy storage and transportation.

3. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S1, the antibacterial agent formula includes parts by weight of chlorine-containing compounds, parts by weight of silver ions, and parts by weight of quaternary ammonium salts; the antibacterial components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the antibacterial agent is fixed on the fabric by drying or natural drying; the amount of the antibacterial agent added is 0.5%-2% of the weight of the fabric.

4. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S1, the fire retardant formula includes parts by weight of phosphate esters, parts by weight of halogen compounds, and parts by weight of metal oxides; the fire retardant components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the fire retardant is fixed on the fabric by drying or natural drying; the amount of fire retardant added is 5%-15% of the weight of the fabric.

5. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S1, the antistatic agent formula includes ionic surfactant, nonionic surfactant and conductive polymer by weight; the antistatic component is mixed with water or other solvent to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the antistatic agent is fixed on the fabric by drying or natural drying; the amount of antistatic agent added is 1%-3% of the weight of the fabric.

6. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S1, the defoaming agent formula includes parts by weight of silicone oil, parts by weight of mineral oil, and parts by weight of fatty acid; the defoaming components are mixed with water or other solvents to form a uniform solution; then, the solution is sprayed or impregnated onto the fabric to make it evenly distributed; finally, the defoaming agent is fixed on the fabric by drying or natural drying; the amount of the defoaming agent added is 0.5%-2% of the weight of the fabric.

7. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S6, the hot pressing temperature is 150-180° C.; the hot pressing time is 2-3 minutes; the hot pressing pressure is 2-4 bar; and the lamination sequence is inner comfort layer - middle protective layer - outer protective layer.

8. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In step S4, during the preparation of the outer protective layer, the following control is performed: The opening temperature is 65-70℃; the carding speed is 120-140 m / min; the needle punching depth is 1.5-2.0 mm; the drying temperature is 120-140℃; and the drying time is 4 minutes.

9. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In the step S2, during the preparation of the inner comfort layer, the opening temperature is controlled to be 50-60°C; the combing speed is 100-150 m / min; the needling depth is 0.5-1.0 mm; the drying temperature is 100-120°C; and the drying time is 2-3 minutes.

10. The tear-resistant protective fabric and its preparation process as claimed in claim 1, characterized in that: In the post-processing process in step S7, the composite fabric is dried to solidify the finishing agent, then subjected to heat setting treatment, and finally the fabric is washed to remove excess additives and solvents, and then dried again.