Waterproof and breathable polyurethane material and method for producing the same

Abstract

This invention discloses a waterproof and breathable polyurethane material and its preparation method, relating to the field of polyurethane material technology. The waterproof and breathable polyurethane material includes a base layer, a middle layer, and a top layer; the thickness ratio of the base layer, middle layer, and top layer is (5-10):(6-10):(4-8); the base layer is selected from regenerated cellulose fiber and synthetic fiber; the middle layer, by weight, contains the following components: 100 parts of waterborne polyurethane resin, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent; the top layer, by weight, contains the following components: 100 parts of waterborne polyurethane resin, 0.01-0.2 parts of scratch-resistant agent, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent. The waterproof and breathable polyurethane material of the present invention has good waterproof and breathable properties, anti-aging properties, a comfortable surface feel, and a high yield rate; moreover, the preparation method is simple and easy to operate, which is convenient for large-scale production.

Description

Technical Field

[0001] This invention relates to the field of polyurethane materials technology, and in particular to a waterproof and breathable polyurethane material and its preparation method. Background Technology

[0002] Leather clothing comes in a wide variety of styles, and when choosing leather clothing, people not only consider its fashionability but also its comfort and functionality.

[0003] Animal leather (such as leather, pigskin, and sheepskin) is often the primary choice for humans due to its natural grain, attractive appearance, odorless nature, good comfort, breathability, water repellency, smooth surface, and long lifespan. However, animal leather resources are limited. Based on environmental and cost considerations, people are gradually using synthetic leather to replace animal leather. Synthetic leather is inexpensive and attractive, but it also has some drawbacks, such as poor breathability, easy aging, and some of its raw materials causing environmental pollution and damage.

[0004] Therefore, it is necessary to research a waterproof and breathable polyurethane material that has good waterproof and breathable properties, a comfortable surface feel, a long service life, low cost, and little or no pollution to the environment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that existing leather has problems such as poor waterproof and breathable properties, lack of comfort, easy aging, short service life and high cost.

[0006] To solve the above-mentioned technical problems, the purpose of this invention is achieved through the following technical solution: providing a waterproof and breathable polyurethane material, which, through the optimized formulation of the fabric layer and the intermediate layer, enables the isocyanate groups to form a cross-linked structure, increasing the adhesion and bonding strength between the material and the base layer, so that the resulting polyurethane material has good waterproof and breathable properties, anti-aging properties, a comfortable surface feel, and a high yield rate; moreover, the preparation method is simple and easy to operate, facilitating large-scale production.

[0007] Specifically, this invention discloses a waterproof and breathable polyurethane material, comprising a base layer, a middle layer, and a top layer; the thickness ratio of the base layer, the middle layer, and the top layer is (5-10):(6-10):(4-8);

[0008] The base material layer is selected from one of regenerated cellulose fiber and synthetic fiber;

[0009] The intermediate layer, by weight, comprises the following components: 100 parts of waterborne polyurethane resin, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent.

[0010] The fabric layer, by weight, contains the following components: 25-35 parts of waterborne polyurethane resin, 0.01-0.2 parts of scratch-resistant agent, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent.

[0011] Preferably, the scratch-resistant agent is KEIM ADDITEC SURFACE's GA-5052 slip agent.

[0012] Preferably, the wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent.

[0013] Preferably, the foaming agent is WFT-02 foaming agent from Weilinna.

[0014] Preferably, the isocyanate curing agent is an HDI isocyanate curing agent with an NCO content of 20-25%.

[0015] This invention also discloses a method for preparing the above-mentioned waterproof and breathable polyurethane material, comprising the following steps:

[0016] S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain fabric layer slurry;

[0017] Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain the intermediate layer slurry;

[0018] S2: Apply the intermediate layer slurry evenly onto the base layer and dry it to obtain the intermediate fabric.

[0019] S3: Coat the fabric layer onto release paper and dry it to obtain a pre-finished fabric layer.

[0020] S4: After bonding the pre-made fabric layer with the intermediate fabric, dry it to obtain a semi-finished product;

[0021] S5: After rolling up the semi-finished product, soak it in a water-repellent solution to obtain a waterproof and breathable polyurethane material.

[0022] Preferably, the fabric layer preform obtained in step S3 is repeated in step S3.

[0023] Preferably, in the water-repellent solution, the mass ratio of water-repellent to water is (5-10):100; the water-repellent is CZSKONIA's SK-ECO.

[0024] Preferably, in step S2, the drying conditions are: temperature 100-140℃, time 15-20min.

[0025] Preferably, in step S3, the drying conditions are: temperature 90-100℃, time 10-20min.

[0026] Beneficial effects:

[0027] The waterproof and breathable polyurethane material of the present invention achieves good waterproof and breathable properties, anti-aging properties, and a comfortable surface feel by optimizing the formulation of the fabric layer and the middle layer, so that the isocyanate groups form a cross-linked structure, which increases the adhesion and bonding strength between the material and the base layer. The resulting polyurethane material has a high yield rate and is simple and easy to operate. Furthermore, the preparation method is simple and easy to operate, which is conducive to large-scale production. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the breathability and waterproofness test performed on the waterproof and breathable polyurethane material prepared in Example 1 of the present invention.

[0030] Figure 2 This is a schematic diagram of the breathability and waterproofness test performed on the polyurethane material prepared in Comparative Example 6. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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.

[0032] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0033] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] A waterproof and breathable polyurethane material includes a base layer, a middle layer, and a top layer; the thickness ratio of the base layer, the middle layer, and the top layer is (5-10):(6-10):(4-8); the total thickness is preferably 0.12-0.20 mm.

[0038] The base material layer is selected from one of regenerated cellulose fiber and synthetic fiber;

[0039] The intermediate layer, by weight, comprises the following components: 25-35 parts of waterborne polyurethane resin, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent;

[0040] The fabric layer, by weight, contains the following components: 25-35 parts of waterborne polyurethane resin, 0.01-0.2 parts of scratch-resistant agent, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent.

[0041] Preferably, the scratch-resistant agent is KEIM ADDITEC SURFACE's GA-5052 slip agent; the wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent; the foam stabilizer is Weilinna's WFT-02 foaming agent; and the isocyanate curing agent is HDI isocyanate curing agent with an NCO content of 20-25%.

[0042] The preparation method of the above-mentioned waterproof and breathable polyurethane material includes the following steps:

[0043] S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain fabric layer slurry;

[0044] Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain the intermediate layer slurry;

[0045] S2: Apply the intermediate layer slurry evenly to the base layer and dry it to obtain the intermediate fabric; in step S2, the drying conditions are: temperature 100-140℃, time 15-20min.

[0046] S3: Coat the fabric layer onto release paper and dry it to obtain a fabric layer pre-product. In step S3, the drying conditions are: temperature 90-100℃, time 10-20min. The fabric layer pre-product obtained in step S3 can be repeated multiple times.

[0047] S4: After bonding the pre-made fabric layer with the intermediate fabric, dry it to obtain a semi-finished product;

[0048] S5: The semi-finished product is rolled up and soaked in a water-repellent solution to obtain a waterproof and breathable polyurethane material. In the water-repellent solution, the mass ratio of water-repellent to water is (5-10):100; the water-repellent is CZSKONIA's SK-ECO.

[0049] Example 1

[0050] A waterproof and breathable polyurethane material is prepared according to the following steps:

[0051] Prepare the ingredients:

[0052] The base layer is made of regenerated cellulose fiber;

[0053] The intermediate layer, by weight, contains the following components: 30 parts waterborne polyurethane resin, 0.3 parts wetting and leveling agent, 3 parts foam stabilizer, and 0.3 parts isocyanate curing agent;

[0054] The fabric layer, by weight, contains the following components: 30 parts waterborne polyurethane resin, 0.1 parts scratch-resistant agent, 0.3 parts wetting and leveling agent, 3 parts foam stabilizer, and 0.3 parts isocyanate curing agent.

[0055] Among them, the scratch-resistant agent is KEIM ADDI TEC SURFACE's GA-5052 slip agent; the wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent; the foaming agent is Weilinna's WFT-02 foaming special additive; and the isocyanate curing agent is HD I isocyanate curing agent with an NCO content of 22%.

[0056] S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain fabric layer slurry;

[0057] Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix thoroughly to obtain the intermediate layer slurry.

[0058] S2: Apply the intermediate layer slurry evenly to the base layer and dry it to obtain the intermediate fabric; in step S2, the drying conditions are: temperature 120℃, time 18min.

[0059] S3: Coat the fabric layer onto release paper and dry it to obtain a fabric layer pre-product. In step S3, the drying conditions are: temperature 95℃, time 15min. The fabric layer pre-product obtained in step S3 can be repeated multiple times.

[0060] S4: After bonding the pre-made fabric layer with the intermediate fabric, dry it to obtain a semi-finished product;

[0061] S5: After rolling up the semi-finished product, soak it in a water-repellent solution (immerse it in the water-repellent solution) to obtain a waterproof and breathable polyurethane material. The soaking time is 10 seconds; the mass ratio of water-repellent to water in the water-repellent solution is 8:100; the water-repellent is CZSKONIA's SK-ECO.

[0062] The waterproof and breathable polyurethane material produced has a total thickness of 0.16 mm, and the thickness ratio of the base layer, intermediate layer and top layer is 7:8:5.

[0063] Example 2

[0064] A waterproof and breathable polyurethane material is prepared according to the following steps:

[0065] Prepare the ingredients:

[0066] The base layer is made of regenerated cellulose fiber;

[0067] The intermediate layer, by weight, contains the following components: 25 parts waterborne polyurethane resin, 0.01 parts wetting and leveling agent, 1 part foam stabilizer, and 0.01 parts isocyanate curing agent.

[0068] The fabric layer, by weight, contains the following components: 25 parts waterborne polyurethane resin, 0.01 parts scratch-resistant agent, 0.01 parts wetting and leveling agent, 1 part foam stabilizer, and 0.01 parts isocyanate curing agent.

[0069] Among them, the scratch-resistant agent is KEIM ADDITEC SURFACE's GA-5052 slip agent; the wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent; the foaming agent is Weilinna's WFT-02 foaming special additive; and the isocyanate curing agent is HDI isocyanate curing agent with an NCO content of 20%.

[0070] S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain fabric layer slurry;

[0071] Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix thoroughly to obtain the intermediate layer slurry.

[0072] S2: Apply the intermediate layer slurry evenly to the base layer and dry it to obtain the intermediate fabric; in step S2, the drying conditions are: temperature 100℃, time 20min.

[0073] S3: Coat the fabric layer onto release paper and dry it to obtain a fabric layer pre-product. In step S3, the drying conditions are: temperature 90℃, time 20min. The fabric layer pre-product obtained in step S3 can be repeated multiple times.

[0074] S4: After bonding the pre-made fabric layer with the intermediate fabric, dry it to obtain a semi-finished product;

[0075] S5: After rolling up the semi-finished product, soak it in a water-repellent solution (immerse it in the water-repellent solution) to obtain a waterproof and breathable polyurethane material. The soaking time is 10 seconds; the mass ratio of water-repellent to water in the water-repellent solution is 5:100; the water-repellent is CZSKONIA's SK-ECO.

[0076] The waterproof and breathable polyurethane material produced has a total thickness of 0.12 mm, and the thickness ratio of the base layer, intermediate layer and top layer is 5:6:4.

[0077] Example 3

[0078] A waterproof and breathable polyurethane material is prepared according to the following steps:

[0079] Prepare the ingredients:

[0080] The base layer is made of regenerated cellulose fiber;

[0081] The intermediate layer, by weight, contains the following components: 35 parts waterborne polyurethane resin, 0.5 parts wetting and leveling agent, 5 parts foam stabilizer, and 0.5 parts isocyanate curing agent;

[0082] The fabric layer, by weight, contains the following components: 35 parts waterborne polyurethane resin, 0.2 parts scratch-resistant agent, 0.5 parts wetting and leveling agent, 5 parts foam stabilizer, and 0.5 parts isocyanate curing agent.

[0083] Among them, the scratch-resistant agent is KEIM ADDITEC SURFACE's GA-5052 slip agent; the wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent; the foaming agent is Weilinna's WFT-02 foaming special additive; and the isocyanate curing agent is HDI isocyanate curing agent with an NCO content of 25%.

[0084] S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain fabric layer slurry;

[0085] Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix thoroughly to obtain the intermediate layer slurry.

[0086] S2: Apply the intermediate layer slurry evenly to the base layer and dry it to obtain the intermediate fabric; in step S2, the drying conditions are: temperature 140℃, time 15min.

[0087] S3: Coat the fabric layer onto release paper and dry it to obtain a fabric layer pre-product. In step S3, the drying conditions are: temperature 100℃, time 10min. The fabric layer pre-product obtained in step S3 can be repeated multiple times.

[0088] S4: After bonding the pre-made fabric layer with the intermediate fabric, dry it to obtain a semi-finished product;

[0089] S5: After rolling up the semi-finished product, soak it in a water-repellent solution (immerse it in the water-repellent solution) to obtain a waterproof and breathable polyurethane material. The soaking time is 10 seconds; the mass ratio of water-repellent to water in the water-repellent solution is 8:100; the water-repellent is CZSKONIA's SK-ECO.

[0090] The waterproof and breathable polyurethane material produced has a total thickness of 0.20 mm, and the thickness ratio of the base layer, intermediate layer and top layer is 10:10:8.

[0091] Meanwhile, according to Example 1, the following comparative examples are set.

[0092] Comparative Example 1 differs from Example 1 in that: the intermediate layer contains 40 parts of waterborne polyurethane resin.

[0093] Comparative Example 2 differs from Example 1 in that: the intermediate layer contains 20 parts of waterborne polyurethane resin.

[0094] Comparative Example 3 differs from Example 1 in that: 1.5 parts of wetting leveling agent are added to the intermediate layer.

[0095] Comparative Example 4 differs from Example 1 in that no wetting and leveling agent is added to the intermediate layer.

[0096] Comparative Example 5 differs from Example 1 in that: in the intermediate layer, there are 6 parts of foaming agent.

[0097] Comparative Example 6 differs from Example 1 in that: 0.1 parts of foaming agent are added to the middle layer.

[0098] Comparative Example 7 differs from Example 1 in that: 1.5 parts of isocyanate curing agent are added to the intermediate layer.

[0099] Comparative Example 8 differs from Example 1 in that no isocyanate curing agent is added to the intermediate layer.

[0100] Comparative Example 9 differs from Example 1 in that: 40 parts of waterborne polyurethane resin are added to the fabric layer.

[0101] Comparative Example 10 differs from Example 1 in that the fabric layer contains 20 parts of waterborne polyurethane resin.

[0102] Comparative Example 11 differs from Example 1 in that: 1.5 parts of wetting and leveling agent are added to the fabric layer.

[0103] Comparative Example 12 differs from Example 1 in that no wetting and leveling agent is added to the fabric layer.

[0104] Comparative Example 13 differs from Example 1 in that: 6 parts of foaming agent are added to the fabric layer.

[0105] Comparative Example 14 differs from Example 1 in that: 0.1 parts of foaming agent are added to the fabric layer.

[0106] Comparative Example 15 differs from Example 1 in that: 1.5 parts of isocyanate curing agent are added to the fabric layer.

[0107] Comparative Example 16 differs from Example 1 in that no isocyanate curing agent is added to the fabric layer.

[0108] Comparative Example 17 differs from Example 1 in that the NCO content of the isocyanate curing agent in the fabric layer is 28%.

[0109] Comparative Example 18 differs from Example 1 in that: 1 part of scratch-resistant agent is added to the fabric layer.

[0110] Comparative Example 19 differs from Example 1 in that no scratch-resistant agent is added to the fabric layer.

[0111] Comparative Example 20, the difference from Example 1 is that in the water-repellent agent solution, the mass ratio of the water-repellent agent to water is 2:100.

[0112] Comparative Example 21, the difference from Example 1 is that in the water-repellent agent solution, the mass ratio of the water-repellent agent to water is 15:100.

[0113] Comparative Example 22, the difference from Example 1 is that the thickness ratio of the bottom layer, the middle layer and the fabric layer is: 14:8:5.

[0114] Comparative Example 23, the difference from Example 1 is that the thickness ratio of the bottom layer, the middle layer and the fabric layer is: 7:14:5.

[0115] Comparative Example 24, the difference from Example 1 is that the thickness ratio of the bottom layer, the middle layer and the fabric layer is: 7:8:12.

[0116] Comparative Example 25, the difference from Example 1 is that the sum of the thicknesses of the bottom layer, the middle layer and the fabric layer (total thickness) is 0.08 mm.

[0117] Comparative Example 26, the difference from Example 1 is that the sum of the thicknesses of the bottom layer, the middle layer and the fabric layer (total thickness) is 0.24 mm.

[0118] The polyurethane materials prepared in Examples 1-3 and Comparative Examples 1-26 were subjected to the following tests, and the measured performance results are shown in Table 1 below.

[0119] Among them, the specific steps of the air permeability and waterproof performance test method: use a leather air permeability, sweat absorption and waterproof tester;

[0120] (1) Pour clear water into the upper part of the instrument cylinder, and the water volume is generally more than half.

[0121] (2) Then continuously press the airbag, press and release it once, and pay attention to observing the water surface.

[0122] (3) For some products, due to air permeability problems, the pressing time may be longer, based on the formation of bubbles: the more bubbles and the smaller the bubbles, the better the air permeability, and the easier it is to press the airbag, which proves that the material is more breathable; on the contrary, the more strenuous it is, the worse the air permeability.

[0123] Among them, the waterproof property is based on the water droplets scattered on the leather after pressing the airbag. If there are no water droplets on the leather surface, it is qualified (Pass), otherwise it is unqualified (Fail).

[0124] Aging test: Soak it at room temperature with a 10% concentration of sodium hydroxide aqueous solution. Among them, if it passes the 24-hour aging test, its aging resistance life is three years; if it passes the 48-hour aging test, its aging resistance life is six years. Specifically, here it is the 48-hour aging test.

[0125] Other: The thickness, skin feel, color, film-forming properties, and drying speed of polyurethane materials are evaluated through observation, rubbing, wetting, and drying.

[0126] Table 1 Performance Results of Examples and Comparative Examples

[0127]

[0128]

[0129]

[0130] As shown in the table, the waterproof and breathable polyurethane material prepared in the examples has good breathability, waterproofness, and anti-aging properties. It also has a suitable thickness, a pleasant feel against the skin, uniform color, good film-forming properties, and fast drying speed. In contrast, most of the comparative examples lack good breathability and waterproofness, and some are more expensive and uneconomical.

[0131] The schematic diagram of the breathability and waterproofness test of the waterproof and breathable polyurethane material prepared in Example 1 is shown below. Figure 1 A schematic diagram of the breathability and waterproofness test of the polyurethane material prepared in Comparative Example 6 is shown below. Figure 2 .

[0132] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A waterproof and breathable polyurethane material, characterized in that, It includes a base layer, a middle layer, and a top layer, with a total thickness of 0.12-0.20 mm; the thickness ratio of the base layer, the middle layer, and the top layer is (5-10):(6-10):(4-8). The raw material for the base layer is selected from one of regenerated cellulose fiber and synthetic fiber; The intermediate layer, by weight, comprises the following components: 25-35 parts of waterborne polyurethane resin, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent; The fabric layer, by weight, contains the following components: 25-35 parts of waterborne polyurethane resin, 0.01-0.2 parts of scratch-resistant agent, 0.01-0.5 parts of wetting and leveling agent, 1-5 parts of foam stabilizer, and 0.01-0.5 parts of isocyanate curing agent. The scratch-resistant agent is KEIM ADDITEC SURFACE's GA-5052 slip agent; The wetting leveling agent is XUHUAC's AKN-UV1151 leveling agent; The foaming agent is WFT-02 foaming agent from Weilinna; The isocyanate curing agent is an HDI isocyanate curing agent with an NCO content of 20-25%.

2. The method of producing a waterproof and breathable polyurethane material according to claim 1, characterized in that, Includes the following steps: S1: Add scratch-resistant agent, wetting and leveling agent, foam stabilizer and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain the fabric layer slurry; Add wetting and leveling agent, foam stabilizer, and isocyanate curing agent to waterborne polyurethane resin and mix evenly to obtain the intermediate layer slurry; S2: Apply the intermediate layer slurry evenly onto the base layer and dry it to obtain the intermediate fabric. S3: Apply the fabric layer slurry onto the release paper and dry it to obtain the fabric layer pre-product; S4: After bonding the pre-fabricated fabric layer with the intermediate fabric, dry it to obtain a semi-finished product; S5: After rolling up the semi-finished product, soak it in a water-repellent solution to obtain a waterproof and breathable polyurethane material.

3. The method of producing a waterproof and breathable polyurethane material according to claim 2, characterized in that, In the water-repellent solution, the mass ratio of water-repellent to water is (5-10):100; the water-repellent is CZSKONIA's SK-ECO.

4. The method for preparing the waterproof and breathable polyurethane material according to claim 2, characterized in that, In step S2, the drying conditions are: temperature 100-140℃, time 15-20min.

5. The method for preparing the waterproof and breathable polyurethane material according to claim 2, characterized in that, In step S3, the drying conditions are: temperature 90-100℃, time 10-20min.

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