Breathable TPU (thermoplastic polyurethane) non-woven fabric composite material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of composite materials, in particular to a breathable TPU non-woven fabric composite material and a preparation method and application thereof.The breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive net film layer arranged on the surface layer, and the TPU hot melt adhesive net film layer is formed by conducting velvet spraying on composite TPU hot melt adhesive particles through a velvet spraying technology; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 70-100 parts of TPU hot melt adhesive particles, 3-7 parts of an antibacterial agent, 0-10 parts of color master batches, 1-5 parts of an anti-ultraviolet additive and 4-10 parts of a foaming agent. The breathable TPU non-woven fabric composite material has good breathability and antibacterial performance, meanwhile, the skin-friendly performance of the composite material is effectively improved, the mechanical performance, breathability and degradable effect of the composite material are guaranteed, and the environmental protection performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a breathable TPU non-woven fabric composite material and a preparation method and application thereof. Background Art

[0002] Composite non-woven fabrics or elastic non-woven fabrics have soft texture, are environmentally friendly, non-toxic, breathable, and naturally antibacterial, and are widely used in clothing, shoe uppers, etc. Existing composite non-woven fabrics are mainly composed of a surface layer or bottom layer of non-woven fabrics and an elastic film in the middle. The elastic film in the middle has poor air permeability and is not breathable when used for clothing. It is easy to breed bacteria, thereby causing skin allergies.

[0003] TPU thermoplastic polyurethane elastomer is an environmentally friendly polymer material with excellent performance. The film material prepared from TPU thermoplastic polyurethane has outstanding air permeability, oil resistance, low temperature resistance, hydrolysis resistance, corrosion resistance, and has excellent elasticity and strength. At present, there is no composite material of non-woven fabric and TPU on the market. The technology in this field is not mature yet, so that the composite materials in this field cannot meet customers' needs for air permeability and comfort, and the applicability is not strong; in addition, the recycling efficiency of existing TPU composite materials is low, and a large amount of TPU materials and non-woven fabrics are discarded after use, and cannot be effectively recycled and reused, which puts pressure on the environment. Therefore, it is necessary to develop an environmentally friendly TPU non-woven composite material with high air permeability. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a breathable TPU non-woven fabric composite material, which has excellent air permeability and antibacterial properties. At the same time, it effectively improves the skin-friendliness of the composite material, ensures the mechanical properties, air permeability, and degradable effects of the composite material, and improves the environmental protection performance.

[0005] The object of the present invention is to provide a method for preparing a breathable TPU non-woven fabric composite material. The method has simple operation, convenient control, high production efficiency, low production cost, is suitable for large-scale production, and can prepare a recyclable and environmentally friendly breathable TPU non-woven fabric composite material.

[0006] The purpose of the present invention is to provide an application of a breathable TPU non-woven fabric composite material, which can be used to make shoes, sportswear, etc., has good air permeability and antibacterial properties, and solves the problems of poor air permeability and poor comfort of previous TPU non-woven fabric composite materials.

[0007] The objective of the present invention is achieved through the following technical scheme: a breathable TPU non-woven fabric composite material, comprising a surface layer and a TPU hot melt adhesive mesh layer arranged on the surface layer, wherein the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 70-100 parts of TPU hot melt adhesive particles, 3-7 parts of antibacterial agent, 0-10 parts of masterbatch, 1-5 parts of anti-ultraviolet additive and 4-10 parts of foaming agent.

[0008] The breathable TPU non-woven fabric composite material in the present invention has good air permeability and antibacterial properties. At the same time, it effectively improves the skin-friendliness of the composite material, ensures the mechanical properties, air permeability, and degradability of the composite material, and improves the environmental performance. The composite TPU hot melt adhesive particles prepared using the above raw materials have a lower softening point and melt viscosity, and have excellent tensile strength and tear strength, so that the TPU hot melt adhesive can effectively reduce energy consumption during use and adapt to more stringent application scenarios; among them, the antibacterial agent used can further improve the antibacterial properties of the composite material; the addition of anti-ultraviolet additives can inhibit and delay the substances that cause light aging of the TPU hot melt adhesive by ultraviolet rays, thereby further improving the comprehensive performance of the composite TPU hot melt adhesive particles.

[0009] Preferably, the antibacterial agent is at least one of 3-(2,3-dihydroxypropyl)-5,5-dimethylhydantoin, nano-MgO, 2,3-pyrazinedicarboxylic acid, and silver-loaded rectorite.

[0010] Preferably, the anti-ultraviolet additive is at least one of ultraviolet absorber UV-P, ultraviolet absorber UV-327, and light stabilizer AM-101.

[0011] The antibacterial agent used in the present invention is a new type of auxiliary agent with antibacterial and bactericidal properties, which further improves the antibacterial properties of the TPU non-woven composite material after synergistically acting with the anti-ultraviolet additive. By using an inorganic nano antibacterial agent, especially an innovative combination of two inorganic nano antibacterial agents, and adding them to the TPU resin, the antibacterial and mildew-proof properties of the TPU material are greatly improved, especially the antibacterial rate against common Escherichia coli and Staphylococcus aureus reaches more than 99%, which can make the TPU non-woven composite material in the present invention have a good antibacterial effect and an additional improvement effect that it is not easy for bacteria to develop tolerance.

[0012] Preferably, the TPU hot melt adhesive particles are polyether aliphatic TPU resistant to 180-230°C.

[0013] Preferably, the TPU hot melt adhesive particles include the following raw materials in parts by weight: 10-20 parts of vegetable oil-based polyester polyol, 60-80 parts of modified TPU resin, 0.1-2.2 parts of chain extender, 1-5 parts of antioxidant, 0.1-0.5 parts of organotin catalyst, and 0.1-0.5 parts of surfactant.

[0014] The modified TPU resin used in the present invention has degradable properties and good mechanical strength, and can significantly improve the comprehensive properties of the PU hot melt adhesive particles after being compounded with other additives; and the plant oil-based polyester polyol used has hydroxyl groups on its surface, and can improve the polarity of the TPU hot melt adhesive after being compounded with the modified TPU resin, and the product has high bonding strength; the surface properties of the modified TPU resin can be effectively improved by adding a surfactant, which is beneficial for compounding with the plant oil-based polyester polyol under the action of a chain extender and an organic tin catalyst, thereby improving the mechanical properties and degradation properties of the TPU hot melt adhesive particles finally obtained, having broad market prospects and meeting the needs of the development of a circular economy.

[0015] Preferably, the modified TPU resin is composed of polybutylene succinate and TPU resin in a ratio of 0.6-1.0:1.0-1.4.

[0016] In the present invention, the biodegradable material polybutylene succinate is modified by mixing with TPU resin in a specific ratio, so that the degradable performance of TPU can be improved, the mechanical strength is better than that of ordinary TPU resin, and at the same time, it has good biodegradability, which reduces the pollution to the environment to a certain extent.

[0017] Preferably, the vegetable oil-based polyester polyol is composed of castor oil, ethylene glycol and oxalic acid in a molar ratio of 0.04-0.08:1.0-1.2:1.

[0018] Preferably, the vegetable oil-based polyester polyol is obtained by adding castor oil, ethylene glycol and oxalic acid into a reaction kettle at a molar ratio of 0.04-0.08:1.0-1.2:1, introducing nitrogen, heating to 120-130°C to react to produce water, adding an appropriate amount of tetrabutyl tert- ...

[0019] The vegetable oil-based polyester polyol in the present invention is prepared by adopting the above method, and castor oil is used to modify the polyol to increase the surface hydroxyl content, thereby improving the polarity of the TPU hot melt adhesive and providing high bonding strength for the product; at the same time, the polyol is modified with natural, renewable and abundant castor oil to alleviate the shortage of petroleum resources, and the product is safe, environmentally friendly and has excellent biodegradability. Through formula control, the synthesized composite TPU hot melt adhesive particle product has excellent high temperature resistance.

[0020] Preferably, the chain extender is at least one of ethylene glycol, 1,4-butanediol, diethylene glycol, 1,2-propylene glycol, neopentyl glycol, methyl propanediol, 1,6-hexanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 1,12-dodecanediol, 1,4-dihydroxymethylcyclohexane, 1,4-cyclohexanediol, hydroquinone dihydroxyethyl ether, 1,4-cyclohexanediamine, 4,4'-diaminodicyclohexylmethane, trimethylhexanediamine, and 3,3'-dimethyl-4,4-diaminodicyclohexylmethane.

[0021] Preferably, the antioxidant is at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, triisotridecyl phosphite, and 4,4'-isopropyl diphenyl C12-15-ol phosphite.

[0022] Preferably, the surfactant is at least one of aliphatic polyoxyethylene ether, alkylphenol polyoxyethylene ether, and fatty acid polyoxyethylene ester.

[0023] Preferably, the TPU hot melt adhesive particles are prepared by the following steps: according to parts by weight, a mixture of vegetable oil-based polyester polyol, modified TPU resin, chain extender, antioxidant, organic tin catalyst, and surfactant is heated and matured in sequence, and crushed to obtain a crushed material; the crushed material is extruded and granulated in sequence to obtain TPU hot melt adhesive particles.

[0024] The present invention also provides a method for preparing a breathable TPU non-woven fabric composite material, comprising the following steps:

[0025] S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use;

[0026] S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use;

[0027] S3. The composite TPU hot melt adhesive particles are sprayed onto the surface of the release paper by a spraying process and dried to form a composite TPU hot melt adhesive web layer with funnel-shaped openings, with one side close to the release paper being a smooth surface and the other side being a rough surface, to finally obtain a breathable TPU non-woven fabric composite material.

[0028] The present invention also provides an application of a breathable TPU non-woven fabric composite material. The breathable TPU non-woven fabric composite material can be used to make shoes and sportswear, has good air permeability and antibacterial properties, and solves the problems of poor air permeability and poor comfort of previous TPU non-woven fabric composite materials.

[0029] The beneficial effects of the present invention are as follows: the breathable TPU non-woven fabric composite material of the present invention has excellent air permeability and antibacterial properties, and at the same time, effectively improves the skin-friendliness of the composite material, ensures the mechanical properties, air permeability, and degradability of the composite material, and improves the environmental performance.

[0030] The preparation method of the breathable TPU non-woven fabric composite material of the present invention is simple to operate, convenient to control, high in production efficiency, low in production cost, suitable for large-scale production, and can prepare a recyclable and environment-friendly breathable TPU non-woven fabric composite material. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0032] Example 1

[0033] A breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive mesh layer arranged on the surface layer, wherein the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 70 parts of TPU hot melt adhesive particles, 3 parts of antibacterial agent, 0.01 parts of masterbatch, 1 part of anti-ultraviolet additive and 4 parts of foaming agent.

[0034] The antibacterial agent is 3-(2,3-dihydroxypropyl)-5,5-dimethylhydantoin.

[0035] The anti-ultraviolet additive is an ultraviolet absorber UV-P.

[0036] The TPU hot melt adhesive particles include the following raw materials in parts by weight: 10 parts of vegetable oil-based polyester polyol, 60 parts of modified TPU resin, 0.1 parts of chain extender, 1 part of antioxidant, 0.1 parts of organic tin catalyst, and 0.1 parts of surfactant.

[0037] The modified TPU resin is composed of polybutylene succinate and TPU resin in a ratio of 0.6:1.0.

[0038] The vegetable oil-based polyester polyol is obtained by adding castor oil, ethylene glycol and oxalic acid into a reaction kettle at a molar ratio of 0.04:1.0:1, introducing nitrogen, heating to 120°C to react to produce water, adding an appropriate amount of tetrabutyl tert- ...

[0039] The chain extender is 1,4-butanediol.

[0040] Preferably, the antioxidant is n-octadecyl 3-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate.

[0041] The surfactant is aliphatic polyoxyethylene ether.

[0042] The TPU hot melt adhesive particles are prepared by the following steps: according to weight parts, a mixture of vegetable oil-based polyester polyol, modified TPU resin, chain extender, antioxidant, organic tin catalyst, and surfactant is heated and matured in sequence, and crushed to obtain a crushed material; the crushed material is extruded and granulated in sequence to obtain TPU hot melt adhesive particles.

[0043] The breathable TPU non-woven fabric composite material is prepared by the following steps:

[0044] S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use;

[0045] S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use;

[0046] S3, spraying the composite TPU hot melt adhesive particles onto the surface of the release paper by a spraying process and drying the particles to form a composite TPU hot melt adhesive mesh layer having funnel-shaped openings, and finally obtaining a breathable TPU non-woven fabric composite material.

[0047] Example 2

[0048] A breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive mesh layer arranged on the surface layer, wherein the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 80 parts of TPU hot melt adhesive particles, 5 parts of antibacterial agent, 5 parts of masterbatch, 3 parts of anti-ultraviolet additive and 6 parts of foaming agent.

[0049] The antibacterial agent is composed of 3-(2,3-dihydroxypropyl)-5,5-dimethylhydantoin, nano-MgO and 2,3-pyrazine dicarboxylic acid in a mass ratio of 0.8:0.7:0.6.

[0050] The anti-ultraviolet additive is ultraviolet absorber UV-327.

[0051] The TPU hot melt adhesive particles include the following raw materials in parts by weight: 15 parts of vegetable oil-based polyester polyol, 70 parts of modified TPU resin, 1.1 parts of chain extender, 3 parts of antioxidant, 0.3 parts of organic tin catalyst, and 0.3 parts of surfactant.

[0052] The modified TPU resin is composed of polybutylene succinate and TPU resin in a ratio of 0.8:1.2.

[0053] The vegetable oil-based polyester polyol is prepared by adding castor oil, ethylene glycol and oxalic acid into a reaction kettle at a molar ratio of 0.06:1.1:1, introducing nitrogen, heating to 125°C to react to produce water, adding an appropriate amount of tetrabutyl tert- ...

[0054] The chain extender is composed of 1,4-butanediol and 4,4'-diaminodicyclohexylmethane in a mass ratio of 1:1.

[0055] Preferably, the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

[0056] The surfactant is alkylphenol polyoxyethylene ether.

[0057] The TPU hot melt adhesive particles are prepared by the following steps: according to weight parts, a mixture of vegetable oil-based polyester polyol, modified TPU resin, chain extender, antioxidant, organic tin catalyst, and surfactant is heated and matured in sequence, and crushed to obtain a crushed material; the crushed material is extruded and granulated in sequence to obtain TPU hot melt adhesive particles.

[0058] The breathable TPU non-woven fabric composite material is prepared by the following steps:

[0059] S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use;

[0060] S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use;

[0061] S3, spraying the composite TPU hot melt adhesive particles onto the surface of the release paper by a spraying process and drying the particles to form a composite TPU hot melt adhesive mesh layer having funnel-shaped openings, and finally obtaining a breathable TPU non-woven fabric composite material.

[0062] Example 3

[0063] A breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive mesh layer arranged on the surface layer, wherein the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 100 parts of TPU hot melt adhesive particles, 7 parts of antibacterial agent, 10 parts of masterbatch, 5 parts of anti-ultraviolet additive and 10 parts of foaming agent.

[0064] The antibacterial agent is nano-MgO.

[0065] The anti-ultraviolet additive is light stabilizer AM-101.

[0066] The TPU hot melt adhesive particles include the following raw materials in parts by weight: 20 parts of vegetable oil-based polyester polyol, 80 parts of modified TPU resin, 2.2 parts of chain extender, 5 parts of antioxidant, 0.5 parts of organic tin catalyst, and 0.5 parts of surfactant.

[0067] The modified TPU resin is composed of polybutylene succinate and TPU resin in a ratio of 1.0:1.4.

[0068] The vegetable oil-based polyester polyol is prepared by adding castor oil, ethylene glycol and oxalic acid into a reaction kettle at a molar ratio of 0.08:1.2:1, introducing nitrogen, heating to 130°C to react to produce water, adding an appropriate amount of tetrabutyl tert- ...

[0069] The chain extender is 4,4'-diaminodicyclohexylmethane.

[0070] Preferably, the antioxidant is triisotridecyl phosphite.

[0071] The surfactant is polyoxyethylene fatty acid ester.

[0072] The TPU hot melt adhesive particles are prepared by the following steps: according to weight parts, a mixture of vegetable oil-based polyester polyol, modified TPU resin, chain extender, antioxidant, organic tin catalyst, and surfactant is heated and matured in sequence, and crushed to obtain a crushed material; the crushed material is extruded and granulated in sequence to obtain TPU hot melt adhesive particles.

[0073] The breathable TPU non-woven fabric composite material is prepared by the following steps:

[0074] S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use;

[0075] S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use;

[0076] S3, spraying the composite TPU hot melt adhesive particles onto the surface of the release paper by a spraying process and drying the particles to form a composite TPU hot melt adhesive mesh layer having funnel-shaped openings, and finally obtaining a breathable TPU non-woven fabric composite material.

[0077] Example 4

[0078] A breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive mesh layer arranged on the surface layer, wherein the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 80 parts of TPU hot melt adhesive particles, 5 parts of antibacterial agent, 5 parts of masterbatch, 3 parts of anti-ultraviolet additive and 8 parts of foaming agent.

[0079] The TPU hot melt adhesive particles are German Huntsman 90AE thermoplastic elastomer TPU.

[0080] The antibacterial agent is composed of 3-(2,3-dihydroxypropyl)-5,5-dimethylhydantoin, nano-MgO and 2,3-pyrazine dicarboxylic acid in a mass ratio of 0.8:0.7:0.6.

[0081] The anti-ultraviolet additive is ultraviolet absorber UV-327.

[0082] The breathable TPU non-woven fabric composite material is prepared by the following steps:

[0083] S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use;

[0084] S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use;

[0085] S3, spraying the composite TPU hot melt adhesive particles onto the surface of the release paper by a spraying process and drying the particles to form a composite TPU hot melt adhesive mesh layer having funnel-shaped openings, and finally obtaining a breathable TPU non-woven fabric composite material.

[0086] Comparative Example 1

[0087] The difference between this comparative example and the above-mentioned Example 2 is that the raw material of the TPU non-woven fabric composite material in this comparative example is conventional TPU particles. The rest of the contents of this comparative example are the same as those in Example 2 and will not be repeated here.

[0088] Comparative Example 2

[0089] The difference between this comparative example and the above-mentioned Example 2 is that: the raw materials of the TPU hot melt adhesive particles in this comparative example do not contain vegetable oil-based polyester polyols, and conventional TUP particles are used, and the remaining raw materials are mixed according to the proportions of Example 3. The rest of the contents of this comparative example are the same as those of Example 2 and will not be repeated here.

[0090] The performance of the TPU non-woven composite materials prepared in Examples 2 and 4 and Comparative Examples 1-2 was tested after film formation. The results are shown in Table 1:

[0091] Tensile strength test: refer to QB / T 1646-2007 "Polyurethane synthetic leather" to test the tensile strength;

[0092] Peel strength test: measured according to GB / T3923 standard;

[0093] Air permeability: Refer to the air permeability standard of non-woven fabrics GB / T 24218.15-2018.

[0094] Table 1

[0095]

[0096] It can be seen from Example 2 that the breathable TPU non-woven fabric composite material prepared by the present invention has advantages such as good air permeability, degradation performance and mechanical properties, as well as antibacterial properties.

[0097] From the comparison between Example 2 and Comparative Examples 1-2, it can be seen that under the same conditions, the addition of plant oil-based polyester multi-component and modified TPU resin in the formula makes the prepared breathable TPU non-woven fabric composite material have good air permeability, degradation performance and mechanical properties, as well as antibacterial properties, and has broad market prospects and application value.

[0098] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A breathable TPU non-woven fabric composite material, comprising a surface layer, characterized in that: It also includes a TPU hot melt adhesive mesh layer arranged on the surface layer, and the TPU hot melt adhesive mesh layer is formed by spraying composite TPU hot melt adhesive particles using a spraying process; the composite TPU hot melt adhesive particles include the following raw materials in parts by weight: 70-100 parts of TPU hot melt adhesive particles, 3-7 parts of antibacterial agent, 0-10 parts of masterbatch, 1-5 parts of anti-ultraviolet additive and 4-10 parts of foaming agent.

2. The breathable TPU non-woven composite material according to claim 1, characterized in that: The TPU hot melt adhesive particles are polyether aliphatic TPU resistant to 180-230°C.

3. The breathable TPU non-woven composite material according to claim 1, characterized in that: The TPU hot melt adhesive particles include the following raw materials in parts by weight: 10-20 parts of vegetable oil-based polyester polyol, 60-80 parts of modified TPU resin, 0.1-2.2 parts of chain extender, 1-5 parts of antioxidant, 0.1-0.5 parts of organic tin catalyst, and 0.1-0.5 parts of surfactant.

4. The breathable TPU non-woven composite material according to claim 3, characterized in that: The modified TPU resin is composed of polybutylene succinate and TPU resin in a ratio of 0.6-1.0:1.0-1.

4.

5. The breathable TPU non-woven fabric composite material according to claim 3, characterized in that: The vegetable oil-based polyester polyol is composed of castor oil, ethylene glycol and oxalic acid in a molar ratio of 0.04-0.08:1.0-1.2:

1.

6. The breathable TPU non-woven fabric composite material according to claim 3, characterized in that: The chain extender is at least one of ethylene glycol, 1,4-butanediol, diethylene glycol, 1,2-propylene glycol, neopentyl glycol, methyl propanediol, 1,6-hexanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 1,12-dodecanediol, 1,4-dihydroxymethylcyclohexane, 1,4-cyclohexanediol, hydroquinone dihydroxyethyl ether, 1,4-cyclohexanediamine, 4,4'-diaminodicyclohexylmethane, trimethylhexanediamine, and 3,3'-dimethyl-4,4-diaminodicyclohexylmethane.

7. The breathable TPU non-woven fabric composite material according to claim 3, characterized in that: The antioxidant is at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, triisotridecyl phosphite, and 4,4'-isopropyl diphenyl C12-15-ol phosphite.

8. The breathable TPU non-woven fabric composite material according to claim 3, characterized in that: The TPU hot melt adhesive particles are prepared by the following steps: according to weight parts, a mixture of vegetable oil-based polyester polyol, modified TPU resin, chain extender, antioxidant, organic tin catalyst, and surfactant is heated and matured in sequence, and crushed to obtain a crushed material; the crushed material is extruded and granulated in sequence to obtain TPU hot melt adhesive particles.

9. A method for preparing the breathable TPU non-woven fabric composite material according to any one of claims 1 to 8, characterized in that: The steps include: S1. Add TPU hot melt adhesive particles, antibacterial agent, masterbatch, anti-ultraviolet additive and foaming agent into a mixer according to weight parts and mix them evenly to obtain a mixture A for standby use; S2, adding mixture A into an extruder for melt extrusion, cutting and cooling to obtain composite TPU hot melt adhesive particles for standby use; S3, spraying the composite TPU hot melt adhesive particles onto the surface of the release paper by a spraying process and drying the particles to form a composite TPU hot melt adhesive mesh layer having funnel-shaped openings, and finally obtaining a breathable TPU non-woven fabric composite material.

10. An application of the breathable TPU non-woven fabric composite material according to any one of claims 1 to 8, characterized in that: The breathable TPU non-woven fabric composite material can be used to make shoes and sportswear.

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