Washable waterproof moisture-permeable composite material and preparation method thereof, fabric and clothes

Abstract

The invention discloses a washable waterproof moisture-permeable composite material, a preparation method thereof, a waterproof moisture-permeable fabric and clothes. The washable waterproof moisture-permeable composite material comprises a three-layer composite structure, the ceramic coating comprises first ceramic particles, the hydrophilic coating comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is larger than the maximum aperture of the microporous membrane, the particle size D50 of the second ceramic particles is smaller than 1000 nm, and the particle size D50 of the hydrophilic polymer is larger than the maximum aperture of the microporous membrane. The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10. The washable waterproof moisture-permeable composite material can be used for preparing a waterproof breathable fabric. According to the washable waterproof moisture-permeable composite material disclosed by the invention, the peel strength of the hydrophilic coating and the washable performance of the whole washable waterproof moisture-permeable composite material are effectively improved while good air permeability is maintained.

Description

Technical Field

[0001] The present application relates to the technical field of textiles and clothing, and in particular to a washable, waterproof and breathable composite material and a preparation method thereof, fabrics and clothing. Background Art

[0002] Microporous membranes have high resistance to hydrostatic pressure and moisture permeability and are widely used in the preparation of waterproof and breathable fabrics, and further in the preparation of waterproof and breathable clothing, etc. When waterproof and breathable fabrics are processed, after washing and soaping, the microporous structure on the microporous membrane changes, and the permeability of the microporous membrane increases, causing the hydrostatic pressure of the microporous membrane to decay severely after washing, and gradually lose its waterproof function.

[0003] In order to enhance the water washing resistance of microporous waterproof and breathable membranes, the traditional technology generally adopts the method of coating polyurethane coating on the surface of microporous membranes to form a polyurethane non-porous membrane with a thickness of micrometer level. The composite membrane formed by the composite of polyurethane non-porous membrane and microporous membrane can improve the water washing resistance and withstand a certain number of water washings. Although the method of coating polyurethane coating on the surface of microporous membranes improves the water washing resistance of waterproof and breathable fabrics, it also has the following problems: when the polyurethane coating is coated on the surface of a microporous membrane with low surface energy, the peel strength of the coating is low. After a certain number of water washings, the polyurethane coating on the composite membrane will be washed off or stratified from the microporous membrane, and the hydrostatic pressure of the composite membrane will still decrease, gradually losing its waterproof function; in addition, since the polyurethane coating forms a polyurethane non-porous membrane, the polyurethane non-porous membrane will cause the micropores of the microporous membrane to be covered or filled, causing the moisture permeability and air permeability of the composite membrane to be significantly lower than that of the microporous membrane. Summary of the invention

[0004] Based on this, it is necessary to provide a washable, waterproof and breathable composite material. The washable, waterproof and breathable composite material of the present invention can significantly improve water resistance and maintain good air permeability.

[0005] An embodiment of the present application provides a washable, waterproof and breathable composite material.

[0006] A washable, waterproof and breathable composite material, comprising a microporous membrane, a ceramic coating layered on one or both sides of the microporous membrane, and a hydrophilic coating layered on the ceramic coating, wherein the ceramic coating layer comprises first ceramic particles, the hydrophilic coating layer comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is greater than the maximum pore size of the microporous membrane, the particle size D50 of the second ceramic particles is less than 1000nm, the ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10, and the moisture permeability of the washable, waterproof and breathable composite material is greater than 5000 g / (m 2 .24h).

[0007] In some embodiments, the first ceramic particles and the second ceramic particles satisfy at least one of the following characteristics:

[0008] (1) The particle size D50 of the first ceramic particles is 100 nm to 1000 nm, preferably 400 nm to 600 nm;

[0009] (2) The particle size D50 of the second ceramic particles is 100 nm to 1000 nm, preferably 200 nm to 600 nm;

[0010] (3) The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 1-3.

[0011] In some embodiments, the ratio of the particle size D50 to D10 of the first ceramic particles is 1 to 3, preferably 1 to 1.5;

[0012] The ratio of the particle sizes D50 and D10 of the second ceramic particles is 1-3, preferably 1-1.5.

[0013] In some embodiments, the microporous membrane comprises a polyolefin microporous membrane. Optionally, the polyolefin microporous membrane is selected from a polyethylene microporous membrane or a polypropylene microporous membrane.

[0014] In some embodiments, the washable, waterproof and breathable composite material further satisfies at least one of the following characteristics:

[0015] (1) The thickness of the microporous membrane is 1 μm to 30 μm, preferably 5 μm to 20 μm;

[0016] (2) The porosity of the microporous membrane is greater than 30%, preferably 40% to 70%;

[0017] (3) The average pore size of the microporous membrane is less than 100 nm, preferably 10 nm to 50 nm;

[0018] (4) The moisture permeability of the washable, waterproof and breathable composite material is not less than 50% of the moisture permeability of the microporous membrane;

[0019] (5) The specific surface area of ​​the washable, waterproof and breathable composite material is 10m 2 / g~60m 2 / g, preferably 40m 2 / g~60m 2 / g;

[0020] (6) The initial hydrostatic pressure of the washable, waterproof and breathable composite material is greater than 20 KPa, preferably 150-200 KPa, and the hydrostatic pressure drop after five washes does not exceed 40% of the initial value.

[0021] In some embodiments, the washable, waterproof and breathable composite material further satisfies at least one of the following characteristics:

[0022] (1) The first ceramic particles include one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles and zirconium oxide particles;

[0023] (2) the second ceramic particles include one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles and zirconium oxide particles;

[0024] (3) The hydrophilic polymer includes one or more of polyurethane, polyamide and polyester.

[0025] In some embodiments, the washable, waterproof and breathable composite material further satisfies at least one of the following characteristics:

[0026] (1) The thickness of the ceramic coating is 0.5 μm to 3 μm;

[0027] (2) The thickness of the hydrophilic coating is 0.5 μm to 3 μm;

[0028] (3) The weight of the ceramic coating is 0.8 g / m 2 ~1.2g / m 2 ;

[0029] (4) The weight of the hydrophilic coating is 0.5 g / m 2 ~3.2g / m 2 .

[0030] An embodiment of the present application also provides a method for preparing a washable, waterproof and breathable composite material.

[0031] A method for preparing a washable, waterproof and breathable composite material, which is used to prepare the washable, waterproof and breathable composite material, comprises the following steps:

[0032] Prepare a ceramic slurry including first ceramic particles, apply the ceramic slurry on one or both sides of the microporous membrane, and dry it to form a ceramic coating;

[0033] A composite slurry including second ceramic particles and a hydrophilic polymer is prepared, the composite slurry is coated on the ceramic coating, and then cured to form a hydrophilic coating.

[0034] In some embodiments, the ceramic slurry includes the following components based on a total amount of 100 parts by weight:

[0035] 1-5 parts by weight of first ceramic particles;

[0036] Adhesive 0.1~6 parts by weight;

[0037] Dispersant 0.1~1 parts by weight;

[0038] Deionized water balance.

[0039] In some embodiments, the composite slurry includes the following components based on a total amount of 100 parts by weight:

[0040] 10-20 parts by weight of second ceramic particles;

[0041] 2-8 parts by weight of microporous lignin;

[0042] Hydrophilic polymer 10-20 parts by weight

[0043] Dispersant 0.2~0.6 parts by weight;

[0044] 2.8-5.0 parts by weight of cross-linking agent;

[0045] Solvent Residue.

[0046] An embodiment of the present application also provides a waterproof and breathable fabric.

[0047] A waterproof and breathable fabric comprises fabric and the above-mentioned washable waterproof and breathable composite material, or the washable waterproof and breathable composite material prepared by the above-mentioned preparation method, wherein the washable waterproof and breathable composite material is arranged on the surface of one side of the fabric along its thickness direction.

[0048] In some embodiments, the moisture permeability of the waterproof and breathable fabric is greater than 5000 g / (m 2 .24h), the initial hydrostatic pressure of the waterproof and breathable fabric is greater than 20KPa, and the hydrostatic pressure of the waterproof and breathable fabric after being washed 5 times does not drop by more than 40% of the initial value.

[0049] An embodiment of the present application also provides a method for preparing a waterproof and breathable fabric.

[0050] A method for preparing a waterproof and breathable fabric comprises the following steps:

[0051] laminating a microporous membrane on a surface of one side of the fabric in the thickness direction; and

[0052] The ceramic coating and the hydrophilic coating of the washable, waterproof and breathable composite material are prepared according to the above-mentioned preparation method of the washable, waterproof and breathable composite material.

[0053] In some embodiments, laminating the microporous membrane onto the fabric comprises the following steps:

[0054] The polyurethane hot melt adhesive is coated on the fabric using a rotary screen printing roller so that the polyurethane hot melt adhesive is distributed on the fabric in a dotted form, the microporous membrane is covered on the surface of the fabric with the polyurethane hot melt adhesive, and after lamination, it is cured at a temperature of 20° C. to 30° C. for at least 48 hours.

[0055] An embodiment of the present application also provides a garment.

[0056] A kind of clothing, at least part of which is made of the above-mentioned waterproof and breathable fabric, or the waterproof and breathable fabric prepared by the above-mentioned preparation method.

[0057] In some embodiments, the apparel includes but is not limited to clothing, socks, hats, scarves, face towels, gloves and masks.

[0058] The above-mentioned washable, waterproof and breathable composite material includes a microporous membrane, a ceramic coating and a hydrophilic coating. Ceramic particles are attached to the microporous membrane and then coated with the hydrophilic coating, which avoids the original microporous structure on the microporous membrane from being filled, covered and blocked. While maintaining the good air permeability of the microporous membrane, the interaction between the ceramic coating and the hydrophilic coating effectively improves the peel strength of the hydrophilic coating and the washability of the entire washable, waterproof and breathable composite material.

[0059] Furthermore, the second ceramic particles in the hydrophilic coating of the present application interact with the hydrophilic polymer to form a microporous structure that can effectively improve the strength of the hydrophilic coating, while also improving the air permeability and moisture permeability, thereby improving the comfort of the wearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0061] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0062] FIG1 is a schematic diagram of a scanning electron microscope photograph of the microporous membrane described in Example 1 of the present invention;

[0063] FIG2 is a scanning electron microscope photograph of a microporous membrane composited with a ceramic coating and a hydrophilic coating according to Example 1 of the present invention;

[0064] FIG3 is a schematic diagram of a scanning electron microscope photograph of the microporous membrane compounded with polyurethane hot melt adhesive in Comparative Example 1. DETAILED DESCRIPTION

[0065] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0066] Herein, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel schemes of "yes" or "no". If multiple "optional" items appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" item is independent of each other. In this application, descriptions such as "optionally contain", "optionally include", etc. mean "contain or not contain". "Optional component X" means that component X exists or does not exist, or means that component X is contained or not contained.

[0067] In the present invention, unless otherwise stated, the sum of the parts of each component in the composition can be 100 parts by weight. Unless otherwise specified, the basis of the percentage (including weight percentage) of the present invention is the total weight of the composition, and in addition, "wt%" herein means mass percentage.

[0068] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0070] The embodiment of the present application provides a washable, waterproof and breathable composite material to solve at least one of the following problems in the technical solution of coating a polyurethane coating on the surface of a microporous membrane to form a composite membrane in the traditional technology: the peel strength of the coating is low, and after a certain number of water washings, the polyurethane coating on the composite membrane will be washed off or delaminated from the microporous membrane, and the hydrostatic pressure of the composite membrane will still decrease, gradually losing its waterproof function; because the polyurethane coating forms a polyurethane non-porous membrane, the polyurethane non-porous membrane will cause the micropores of the microporous membrane to be covered and filled, causing the moisture permeability and air permeability of the composite membrane to be significantly lower than that of the microporous membrane. The washable, waterproof and breathable composite material will be described in conjunction with the embodiments below. The washable, waterproof and breathable composite material of the present application can be used for waterproof clothing, sports equipment preparation and other purposes.

[0071] Exemplarily, a washable, waterproof and breathable composite material comprises a microporous membrane, a ceramic coating stacked on one or both sides of the microporous membrane, and a hydrophilic coating stacked on the ceramic coating, wherein the ceramic coating comprises first ceramic particles, the hydrophilic coating comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is greater than the maximum pore size of the microporous membrane, the particle size D50 of the second ceramic particles is less than 1000nm, the ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10, and the moisture permeability of the washable, waterproof and breathable composite material is greater than 5000 g / (m 2 .24h). It should be noted that the stacking arrangement in the present application includes stacking in position and a certain connection relationship between two adjacent layers.

[0072] Microporous membranes, such as polyolefin microporous membranes, have the characteristics of high moisture permeability and high hydrostatic pressure, and can be used in waterproof and breathable fabrics. However, the microporous structure of single-component polyolefin microporous membranes is easily destroyed, and the hydrostatic pressure decays severely after washing. Based on this, in order to improve the water-washing resistance of polyolefin microporous membranes, the present application composites a ceramic coating and a hydrophilic coating on the surface of the microporous membrane. The ceramic coating can maintain the original micropores of the microporous membrane, so that it has good air permeability. At the same time, the interaction between the ceramic coating and the hydrophilic coating is used to effectively improve the peel strength of the hydrophilic coating and the water-washing resistance of the entire washable waterproof and breathable composite material. The washable waterproof and breathable composite material can be used for the preparation of waterproof and breathable fabrics, which solves the problem of hydrostatic pressure decay of waterproof and breathable fabrics after washing in traditional technologies.

[0073] In some embodiments, the particle size D50 of the first ceramic particles is 100 nm to 1000 nm, preferably 400 nm to 600 nm. The value of the particle size D50 of the first ceramic particles includes but is not limited to: 100 nm, 200 nm, 400 nm, 500 nm, 600 nm, 700 nm, 900 nm, 1000 nm or a range between any two of the foregoing.

[0074] In some embodiments, the particle size D50 of the second ceramic particles is 100 nm to 1000 nm, preferably 200 nm to 600 nm. The value of the particle size D50 of the second ceramic particles includes but is not limited to: 100 nm, 200 nm, 400 nm, 500 nm, 600 nm, 700 nm, 900 nm, 1000 nm or a range between any two of the foregoing.

[0075] In some embodiments, the ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1 to 10, preferably 1 to 3. The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles includes but is not limited to: 0.1, 0.5, 1, 1.1, 1.3, 1.5, 2, 2.5, 3, 4, 5, 7, 9, 10 or a range between any two of the foregoing.

[0076] In some embodiments, in some embodiments, the ratio of the particle size D50 to D10 of the first ceramic particles is 1 to 3, preferably 1 to 1.5, and more preferably 1 to 1.2. For example, 1, 1.05, 1.1, 1.2, 1.3, 1.5, 2, 2.5, 3, or any range between the foregoing. If the ratio of D50 to D10 is too large, it means that D10 is very small, which easily causes the first ceramic particles to enter the micropores of the microporous membrane, block the micropores, and reduce the moisture permeability.

[0077] The ratio of the particle size D50 and D10 of the second ceramic particles is 1 to 3, preferably 1 to 1.5, and more preferably 1 to 1.2, such as 1, 1.05, 1.1, 1.2, 1.3, 1.5, 2, 2.5, 3 or any two of the above ranges. If the ratio of D50 to D10 is too large, it means that the particle size distribution of the second ceramic particles is uneven, which in turn affects the peel strength and moisture permeability of the hydrophilic coating. In the present application, the feature of D50 / D10 is used to highlight that the particle sizes of the selected first ceramic particles and the second ceramic particles are relatively average. The closer the ratio of D50 / D10 is to 1, the more average the particle size is, and the better the effect is. Based on this, in the present application, the preferred range of the particle size D50 and D10 of the first ceramic particles is 1 to 1.5, and more preferably 1 to 1.2. The ratio of the particle size D50 and D10 of the second ceramic particles is 1 to 3, preferably 1 to 1.5, and more preferably 1 to 1.2, that is, the closer to 1, the better.

[0078] In some of these embodiments, the microporous membrane comprises a polyolefin microporous membrane.

[0079] In some embodiments, the microporous membrane includes a polyethylene microporous membrane (PE membrane), a polypropylene microporous membrane (PP membrane), or a microporous membrane made of a mixture of polyethylene and polypropylene.

[0080] In some embodiments, the thickness of the microporous membrane is 1 μm to 30 μm. Preferably, the thickness of the microporous membrane is 5 μm to 20 μm. The thickness of the microporous membrane includes but is not limited to: 1 μm, 3 μm, 5 μm, 9 μm, 10 μm, 11 μm, 12 μm, 15 μm, 17 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm or a range between any two of the foregoing. If the thickness of the microporous membrane is too low, the strength will be too low and the hydrostatic pressure will be too low, which does not meet the use requirements; if the thickness is too high, the moisture permeability will be reduced, which also does not meet the use requirements.

[0081] In some embodiments, the porosity of the microporous membrane is greater than 30%. Preferably, the porosity of the microporous membrane is 40% to 70%. The porosity of the microporous membrane includes but is not limited to: 40%, 45%, 50%, 55%, 60%, 65%, 70% or a range between any two of the foregoing. If the porosity of the microporous membrane is too low, it will result in low moisture permeability and fail to meet the use requirements; if the porosity is too high, it may cause the hydrostatic pressure to be too low.

[0082] In some embodiments, the average pore size of the microporous membrane is less than 100 nm, preferably 10 nm to 70 nm. The pore size of the microporous membrane includes but is not limited to: 10 nm, 20 nm, 25 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm or a range between any two of the foregoing. If the pore size of the microporous membrane is too low, it will result in low moisture permeability and fail to meet the use requirements; if the pore size is too large, it will result in too low hydrostatic pressure.

[0083] The microporous membrane within the above thickness, porosity range and average pore size is selected, and its moisture permeability is 10000 (g / m 2 .24h)~15000(g / m 2 .24h), and the initial hydrostatic pressure is greater than 20Kpa, preferably 150~200Kpa.

[0084] In some of the embodiments, the moisture permeability of the washable, waterproof and breathable composite material is not less than 50% of the moisture permeability of the microporous film, such as 50%, 55%, 60%, 70%, etc.

[0085] In some embodiments, the specific surface area of ​​the washable, waterproof and breathable composite material is 10 m 2 / g~60m 2 / g. Preferably, the specific surface area of ​​the washable, waterproof and breathable composite material is 40m 2 / g~60m 2 / g. The specific surface area of ​​the washable, waterproof and breathable composite material includes 10m 2 / g, 20m 2 / g, 30m 2 / g, 40m2 / g, 50m 2 / g, 60m 2 / g or a range between any two of the foregoing.

[0086] In some embodiments, the initial hydrostatic pressure of the washable waterproof and breathable composite material is greater than 20 Kpa, preferably 150 Kpa to 200 Kpa, such as 20 Kpa, 50 Kpa, 80 Kpa, 100 Kpa, 150 Kpa, 160 Kpa, 170 Kpa, 180 Kpa, 190 Kpa, 200 Kpa or any range between two of the foregoing. The hydrostatic pressure after washing 5 times does not drop by more than 40% of the initial value.

[0087] In some embodiments, the first ceramic particles include a mixture of one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles, and zirconium oxide particles.

[0088] In some embodiments, the second ceramic particles include a mixture of one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles, and zirconium oxide particles.

[0089] In some embodiments, the hydrophilic polymer includes one or more of polyurethane, polyamide and polyester. In the present application, second ceramic particles and hydrophilic polymer are added to the hydrophilic coating, and the microporous structure formed by the second ceramic particles and the hydrophilic polymer can effectively improve the strength of the hydrophilic coating, and also improve the air permeability, increase the moisture permeability, and achieve the improvement of the wearer's comfort.

[0090] An embodiment of the present application provides a method for preparing a washable, waterproof and breathable composite material.

[0091] It should be noted that, in the present embodiment, unless otherwise stated, each reaction step may be carried out in the order described herein, or may not be carried out in the order described herein. For example, other steps may be included between each reaction step, and the order may be appropriately swapped between the reaction steps. This is something that the technician can determine based on conventional knowledge and experience. Preferably, the reaction method in the present embodiment is carried out in sequence.

[0092] A method for preparing a washable, waterproof and breathable composite material comprises the following steps:

[0093] S11, preparing a ceramic slurry including first ceramic particles, coating the ceramic slurry on one side or both sides of the microporous membrane, and drying the slurry to form a ceramic coating.

[0094] S12, preparing a composite slurry including second ceramic particles and a hydrophilic polymer, coating the composite slurry on the ceramic coating, and performing a curing treatment to form a hydrophilic coating.

[0095] In some embodiments, the ceramic slurry includes the following components based on a total amount of 100 parts by weight:

[0096] 1-5 parts by weight of first ceramic particles;

[0097] Adhesive 0.1~6 parts by weight;

[0098] Dispersant 0.1~1 parts by weight;

[0099] Deionized water balance.

[0100] In some embodiments, the composite slurry includes the following components based on a total amount of 100 parts by weight:

[0101] 10-20 parts by weight of second ceramic particles;

[0102] 2-8 parts by weight of microporous lignin;

[0103] Hydrophilic polymer 10-20 parts by weight

[0104] Dispersant 0.2~0.6 parts by weight;

[0105] 2.8-5.0 parts by weight of cross-linking agent;

[0106] Solvent Residue.

[0107] In some embodiments, the adhesive includes any one or more combinations of acrylate, polyurethane resin, epoxy resin, vinyl acetate resin, modified epoxy resin, hydroxypropyl methylcellulose, ethyl cellulose, carboxymethyl cellulose and polyvinyl alcohol.

[0108] In some embodiments, the dispersant includes any one or more combinations of polyvinyl pyrrolidone, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, polyethylene glycol, hydroxypropyl methylcellulose, polyvinyl alcohol, N,N-dimethylformamide, N-methylpyrrolidone, sodium carboxymethyl cellulose, ammonium polyacrylate, ethylene oxide, ethylene glycol and isopropanol.

[0109] In some embodiments, the crosslinking agent includes any one or more combinations of blocked isocyanate, triallyl cyanurate, and trimethylolpropane triacrylate.

[0110] In some embodiments, the solvent includes deionized water, or a mixed solution of butanone and toluene, wherein the weight ratio of the butanone to the toluene is (10-13): (10-21).

[0111] In some of the embodiments, in step S11 of the method for preparing the washable, waterproof and breathable composite material, a micro-concave roller coating method is used during coating.

[0112] In some of the embodiments, in step S11 of the method for preparing a washable, waterproof and breathable composite material, the drying step is performed at a temperature of 60° C. to 90° C. for 1 min to 2 min.

[0113] In some embodiments, in step S11 of the method for preparing a washable, waterproof and breathable composite material, the net weight gain of the microporous membrane after drying is controlled to be 0.8 g / m 2 ~1.2g / m 2 It should be noted that the above net weight gain refers to the weight of the ceramic coating formed by the ceramic slurry coated on the microporous membrane after drying.

[0114] In some of the embodiments, in step S12 of the method for preparing the washable, waterproof and breathable composite material, a floating knife coater is used to coat the composite slurry on the ceramic coating.

[0115] In some of the embodiments, in step S12 of the method for preparing a washable, waterproof and breathable composite material, the viscosity of the composite slurry is controlled to be 12000 mPa.S-18000 mPa.S.

[0116] In some of the embodiments, in step S12 of the method for preparing the washable, waterproof and breathable composite material, during the curing treatment, the curing temperature is 90° C. to 160° C., and the curing time is 3 min to 5 min.

[0117] In some embodiments, in step S12 of the method for preparing a washable, waterproof and breathable composite material, the net weight gain of the microporous membrane after curing is controlled to be 1.8 g / m 2 ~2.2g / m 2 It should be noted that the above net weight gain refers to the weight of the hydrophilic coating formed by the composite slurry coated on the microporous membrane after curing.

[0118] An embodiment of the present application provides a waterproof and breathable fabric.

[0119] A waterproof and breathable fabric comprises fabric and the above-mentioned washable waterproof and breathable composite material, or a washable waterproof and breathable composite material prepared by the above-mentioned preparation method of the washable waterproof and breathable composite material, wherein the washable waterproof and breathable composite material is laminated on the surface of one side of the fabric along its thickness direction.

[0120] In some embodiments, the water-proof and breathable fabric prepared by the above-mentioned method for preparing a washable, waterproof and breathable composite material has a water permeability greater than 5000 (g / m 2.24h), the initial hydrostatic pressure of the waterproof and breathable fabric is greater than 20KPa, and the hydrostatic pressure drop of the waterproof and breathable fabric after washing 5 times does not exceed 40% of the initial value. The hydrostatic pressure is tested in accordance with the national standard GB / T8629.

[0121] An embodiment of the present application provides a method for preparing a waterproof and breathable fabric.

[0122] It should be noted that, in the present embodiment, unless otherwise stated, each reaction step may be carried out in the order described herein, or may not be carried out in the order described herein. For example, other steps may be included between each reaction step, and the order may be appropriately swapped between the reaction steps. This is something that the technician can determine based on conventional knowledge and experience. Preferably, the reaction method in the present embodiment is carried out in sequence.

[0123] A method for preparing a waterproof and breathable fabric comprises the following steps:

[0124] S21, laminating the microporous membrane onto the surface of one side of the fabric along the thickness direction thereof.

[0125] S22. Prepare a ceramic coating and a hydrophilic coating of the washable, waterproof and breathable composite material according to the above-mentioned method for preparing the washable, waterproof and breathable composite material.

[0126] In some embodiments, in step S21, laminating the microporous membrane on the fabric includes the following steps:

[0127] Use a rotary screen printing roller to apply polyurethane hot melt adhesive on the fabric, so that the polyurethane hot melt adhesive is distributed on the fabric in the form of dots, cover the microporous membrane on the surface of the fabric with the polyurethane hot melt adhesive, and cure it at a temperature of 20°C to 30°C for at least 48 hours after lamination.

[0128] In some embodiments, the polyurethane hot melt adhesive is a moisture curing polyurethane hot melt adhesive.

[0129] In some of the embodiments, the order of step S21 and step S22 may be swapped.

[0130] An embodiment of the present application provides a garment.

[0131] A kind of clothing, at least part of which is made of the above-mentioned waterproof and breathable fabric, or the waterproof and breathable fabric prepared by the above-mentioned method for preparing the waterproof and breathable fabric.

[0132] In some embodiments, apparel includes, but is not limited to, clothing, socks, hats, scarves, face towels, gloves, and masks.

[0133] The present application is described below with reference to embodiments.

[0134] Unless otherwise specified, the substances involved in the specific embodiments of the present invention are all conventional materials in the art and can be purchased commercially. In particular, the information of some of the substances involved is as follows:

[0135] First ceramic particles: specifically alumina ceramic particles, purchased from Shandong Guoci Functional Materials Co., Ltd.;

[0136] Second ceramic particles: specifically alumina ceramic particles, purchased from Shandong Guoci Functional Materials Co., Ltd.;

[0137] Microporous lignin: purchased from Feicheng Hanli Cellulose Co., Ltd.

[0138] Hydrophilic polymer: specifically polyurethane, purchased from Henkel (China) Investment Co., Ltd.;

[0139] Microporous membrane: specifically PE microporous membrane or PP microporous membrane, purchased from Shenzhen Xingyuan Material Technology Co., Ltd.

[0140] Example 1

[0141] This embodiment 1 provides a waterproof and breathable fabric.

[0142] The waterproof and breathable fabric of this embodiment 1 is prepared by the following preparation method. The preparation method of the waterproof and breathable fabric comprises the following steps:

[0143] 1) PE microporous membrane was selected as the microporous membrane. The thickness of the microporous membrane was 12 μm, the porosity was 44%, the average pore size was 21 nm, the maximum pore size was 75 nm, the hydrostatic pressure was 150 KPa, and the moisture permeability was 11000 (g / m 2 .24h), and the scanning electron microscope photo of the microporous membrane is shown in Figure 1. The polyurethane hot melt adhesive is coated on the polyester woven fabric using a rotary screen printing roller, so that the polyurethane hot melt adhesive is applied to the fabric in a dotted form, and the microporous membrane is covered on the surface of the fabric with the polyurethane hot melt adhesive. After lamination, it is cured at 30°C for 48h to achieve the composite connection of the microporous membrane to the fabric.

[0144] 2) 5 parts of first ceramic particles with a particle size D50 of 500 nm, 5 parts of acrylate adhesive, and 1 part of polyacrylate ammonium salt dispersant were added to 89 parts of deionized water, and mixed and stirred at 1000 rpm in a double planetary mixer for 20 minutes to obtain a ceramic slurry. The ratio of the particle size D50 to D10 of the first ceramic particles was 1.1.

[0145] 3) The ceramic slurry in step 2) is coated on the microporous membrane by a micro-concave roller coating method, and dried at 60°C for 2 minutes to form a ceramic coating. The net weight gain of the microporous membrane after drying is controlled to be 1g / m 2The moisture permeability of the microporous membrane with ceramic coating was 11090 (g / m 2 .24h), it can be seen that the moisture permeability of the microporous membrane has not decreased, indicating that the microporous structure on the microporous membrane is not completely filled and blocked, and the microporous membrane composite with ceramic coating has good air permeability.

[0146] 4) After 20 parts of waterborne polyurethane coating adhesive and 59.5 parts of solvent ionized water were mixed and stirred, 10 parts of second ceramic particles with a particle size D50 of 100 nm, 5 parts of microporous lignin, and 0.5 parts of polyacrylate ammonium salt dispersant were added in sequence, and after stirring for 20 minutes, 5 parts of cross-linking agent blocked isocyanate were added, and after stirring evenly, a composite slurry was obtained, and the viscosity of the composite slurry was controlled to be between 12000mPa.S and 16000mPa.S. Among them, the ratio of the particle size D50 to D10 of the second ceramic particles was 1.1.

[0147] 5) The composite slurry in step 4) is coated on the ceramic coating by a floating knife coater, and cured at 90°C for 5 minutes. The net weight gain of the microporous membrane after curing is controlled to be 2g / m 2 , a hydrophilic coating is obtained. The scanning electron microscope photograph of the microporous membrane composited with the ceramic coating and the hydrophilic coating is shown in Figure 2.

[0148] Example 2

[0149] The preparation method of the waterproof and breathable fabric of Example 2 is substantially the same as that of Example 1, except that, in the waterproof and breathable fabric of Example 2, the particle size D50 of the second ceramic particles in the composite slurry of step 4) is 200 nm.

[0150] Example 3

[0151] The preparation method of the waterproof and breathable fabric of Example 3 is substantially the same as that of Example 1, except that, in the waterproof and breathable fabric of Example 3, the particle size D50 of the second ceramic particles in the composite slurry of step 4) is 500 nm.

[0152] Example 4

[0153] The preparation method of the waterproof and breathable fabric of Example 4 is substantially the same as that of Example 1, except that, in the waterproof and breathable fabric of Example 4, the particle size D50 of the second ceramic particles in the composite slurry of step 4) is 800 nm.

[0154] Example 5

[0155] The preparation method of the waterproof and breathable fabric of Example 5 is substantially the same as that of Example 1, except that, in the waterproof and breathable fabric of Example 5, the particle size D50 of the second ceramic particles in the composite slurry of step 4) is 1000 nm.

[0156] Example 6

[0157] The preparation method of the waterproof and breathable fabric of Example 6 is basically the same as that of Example 3, except that, in the waterproof and breathable fabric of Example 6, the particle size D50 of the first ceramic particles in the ceramic slurry of step 1) is 100 nm.

[0158] Example 7

[0159] The preparation method of the waterproof and breathable fabric of Example 7 is substantially the same as that of Example 3, except that, in the waterproof and breathable fabric of Example 7, the particle size D50 of the first ceramic particles in the ceramic slurry of step 1) is 400 nm.

[0160] Example 8

[0161] The preparation method of the waterproof and breathable fabric of Example 8 is substantially the same as that of Example 3, except that, in the waterproof and breathable fabric of Example 8, the particle size D50 of the first ceramic particles in the ceramic slurry of step 1) is 600 nm.

[0162] Example 9

[0163] The preparation method of the waterproof and breathable fabric of Example 9 is substantially the same as that of Example 3, except that, in the waterproof and breathable fabric of Example 9, the particle size D50 of the first ceramic particles in the ceramic slurry of step 1) is 800 nm.

[0164] Example 10

[0165] The preparation method of the waterproof and breathable fabric of Example 10 is basically the same as that of Example 3, except that, in the waterproof and breathable fabric of Example 10, the ratio of the particle size D50 to D10 of the first ceramic particles in the ceramic slurry of step 1) is 3, and the ratio of the particle size D50 to D10 of the second ceramic particles in the composite slurry of step 4) is 3.

[0166] Comparative Example 1

[0167] The PE microporous membrane of Example 1 is used, and a polyurethane hot melt adhesive is coated on the polyester woven fabric using a rotary screen printing roller, so that the polyurethane hot melt adhesive is applied to the fabric in a dotted form, and the microporous membrane is covered on the surface of the fabric with the polyurethane hot melt adhesive. After lamination, it is cured at 30°C for 48 hours to achieve a composite connection of the microporous membrane to the fabric to obtain a waterproof and breathable fabric, as shown in Figure 3.

[0168] Comparative Example 2

[0169] The PE microporous membrane of Example 1 was used, and a polyurethane hot melt adhesive was coated on a polyester woven fabric using a rotary screen printing roller, so that the polyurethane hot melt adhesive was applied to the fabric in a dotted form, and the microporous membrane was covered on the surface of the fabric with the polyurethane hot melt adhesive, and after lamination, it was cured at a temperature of 30° C. for 48 hours to realize the composite connection of the microporous membrane to the fabric;

[0170] Use a scraper to evenly coat the polyurethane coating latex on the membrane surface of the composite fabric. The composition of the polyurethane coating latex is: 100 parts of water-based polyurethane coating glue, 100 parts of deionized water, and 5 parts of crosslinking agent. Control the coating dry weight gain to 2g / m 2 , curing temperature 90°C, curing time 5 minutes. The polyurethane coating is cured to obtain a waterproof and breathable fabric with a polyurethane protective layer coated on the surface.

[0171] Comparative Example 3

[0172] The preparation method of the waterproof and breathable fabric of Comparative Example 3 is basically the same as that of Example 3, except that the waterproof and breathable fabric of Comparative Example 3 does not include step 2) and step 3), that is, there is no ceramic coating, and after step 1), a hydrophilic coating containing second ceramic particles is directly coated on the microporous membrane.

[0173] Comparative Example 4

[0174] The preparation method of the waterproof and breathable fabric of Comparative Example 4 is basically the same as that of Example 3, except that in the waterproof and breathable fabric of Comparative Example 4, the composition of the composite slurry in step 4) is: 100 parts of water-based polyurethane coating glue, 100 parts of deionized water, 5 parts of cross-linking agent, and does not contain second ceramic particles.

[0175] Performance Test:

[0176] (1) Appearance: The waterproof and breathable material provided in Example 1 was tested using a ZEISS scanning electron microscope. The scanning electron microscope image of the surface of the composite diaphragm provided in Example 1 obtained by the test is shown in FIG. 1 .

[0177] (2) Porosity: The test was conducted using the BSD-660 high-performance specific surface area and pore size analyzer in accordance with the national standard GB / T36363-2018.

[0178] (3) Moisture permeability: Test waterproof and breathable fabrics in accordance with GB / T 12704.1.

[0179] (4) Hydrostatic pressure: Tested in accordance with GB / T4744-2013.

[0180] (5) Hydrostatic pressure after 5 washes: After 5 washes according to GB / T8629, test according to GB / T4744-2013.

[0181] (6) Pore diameter: Tested in accordance with ASTM F316-03(2019).

[0182] (7) Peel strength: tested in accordance with ISO02411-2000.

[0183] (8) Specific surface area: tested in accordance with GB / T 19587-2017.

[0184] The test results are shown in Table 1:

[0185] Table 1

[0186]

[0187] It can be seen from Examples 1 to 10 that the moisture permeability of the waterproof and breathable fabric prepared by the method for preparing the waterproof and breathable fabric in the present application is greater than 9000 (g / m 2 .24h), the initial hydrostatic pressure of the waterproof and breathable fabric is greater than 150KPa, and the hydrostatic pressure drop of the waterproof and breathable fabric after washing 5 times does not exceed 40% of the initial value. Further, in Example 10, the ratio of the particle size D50 to D10 of the first ceramic particles in the ceramic slurry of step 1) is 3, and the ratio of the particle size D50 to D10 of the second ceramic particles in the composite slurry of step 4) is 3. The ratio of the particle size D50 to D10 of the first ceramic particles in Example 3 is 1, and the ratio of the particle size D50 to D10 of the second ceramic particles is 1. By comparing Example 10 with Example 3, it can be seen that the moisture permeability of Example 10 is 10600 (g / m 2 .24h) decreases because some of the first ceramic particles with small particle size enter the pores and block the micropores, resulting in a decrease in moisture permeability. Therefore, the ratio of D50 to D10 of the first ceramic particles and the ratio of D50 to D10 of the second ceramic particles are preferably close to a ratio of 1.

[0188] By comparing Example 1 with Comparative Example 1, it can be seen that Comparative Example 1 has no ceramic coating or hydrophilic coating. Therefore, the fabric prepared therefrom has a small specific surface area, and the hydrostatic pressure after 5 washings drops to 5 KPa.

[0189] By comparing Example 1 with Comparative Example 2, it can be seen that in Comparative Example 2, the second ceramic particles are missing. Therefore, the hydrophilic coating formed by the composite slurry does not have a microporous structure. The hydrophilic coating fills and covers the microporous structure on the ceramic coating and the microporous membrane, resulting in a moisture permeability of 3200 (g / m 2 .24h), which is much smaller than 10920 (g / m 2.24h), since the composite slurry of comparative example 2 does not add the second ceramic particles, the hydrophilic coating of comparative example 1 lacks the microporous structure formed by the powder, so it is difficult to improve the strength of the hydrophilic coating, which also causes the air permeability of the prepared fabric to decrease, and the moisture permeability is also greatly reduced compared with that of Example 1. In addition, the initial hydrostatic pressure of the fabric of comparative example 2 is 175KPa, and the initial hydrostatic pressure of the waterproof and breathable fabric of Example 1 is 189KPa, which are basically equivalent, but after washing 5 times, the hydrostatic pressure of the waterproof and breathable fabric of Example 1 is 167KPa, while the hydrostatic pressure of the fabric of comparative example 2 is 90KPa, so the structural strength of the fabric of comparative example 2 is also greatly reduced compared with that of Example 1.

[0190] From the comparison between Example 1 and Comparative Example 3, it can be seen that in Comparative Example 3, there is no ceramic coating. After step 1), the hydrophilic coating containing the second ceramic particles is directly coated on the microporous membrane, resulting in an increase in the specific surface area of ​​the fabric. The hydrophilic coating fills and covers the microporous structure on the microporous membrane without the cooperation of the ceramic coating, resulting in a moisture permeability of the composite fabric of 5900 (g / m 2 .24h), which is much smaller than 10920 (g / m 2 .24h), in addition, the initial hydrostatic pressure of the fabric of Comparative Example 3 is 162KPa, the performance of the fabric is lower than that of Example 1, and after being washed 5 times, the hydrostatic pressure of the fabric of Comparative Example 3 is 97KPa, therefore, the structural strength of the fabric of Comparative Example 3 is also greatly reduced compared with that of Example 1.

[0191] By comparing Example 3 with Comparative Example 4, it can be seen that the composition of the composite slurry in step 4) of Comparative Example 4 is: 100 parts of water-based polyurethane coating glue, 100 parts of deionized water, 5 parts of cross-linking agent, and no second ceramic particles are contained. The hydrophilic coating formed by the composite slurry does not have a microporous structure. The hydrophilic coating fills and covers the microporous structure on the ceramic coating and the microporous membrane, resulting in a moisture permeability of the composite fabric of 4700 (g / m 2 .24h), which is much smaller than 11700 (g / m 2 .24h), since there is no second ceramic particle and microporous lignin in Comparative Example 4, the hydrophilic coating of Comparative Example 3 lacks the microporous structure formed by the powder, and it is difficult to improve the strength of the hydrophilic coating, which also causes the air permeability of the fabric to decrease, and the moisture permeability is also greatly reduced compared with Example 3. In addition, the initial hydrostatic pressure of the fabric of Comparative Example 3 is 170KPa, and the initial hydrostatic pressure of the waterproof and breathable fabric of Example 3 is 195KPa, which are basically equivalent, but after washing 5 times, the hydrostatic pressure of the waterproof and breathable fabric of Example 3 is 185KPa, while the hydrostatic pressure of the fabric of Comparative Example 3 is 65KPa, so the structural strength of the fabric of Comparative Example 3 is also greatly reduced compared with Example 3.

[0192] In summary, the washable, waterproof and breathable composite material in the present application includes a microporous membrane, a ceramic coating and a hydrophilic coating. Ceramic particles are attached to the microporous membrane and then coated with the hydrophilic coating to avoid the original microporous structure on the microporous membrane from being completely filled, covered and blocked. While maintaining the good air permeability of the microporous membrane, the interaction between the ceramic coating and the hydrophilic coating effectively improves the peel strength of the hydrophilic coating and the washability of the entire washable, waterproof and breathable composite material.

[0193] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0194] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0195] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A washable, waterproof and breathable composite material, characterized in that: The invention comprises a microporous membrane, a ceramic coating layered on one side or both sides of the microporous membrane, and a hydrophilic coating layered on the ceramic coating, wherein the ceramic coating layer comprises first ceramic particles, the hydrophilic coating layer comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is greater than the maximum pore size of the microporous membrane, the particle size D50 of the second ceramic particles is less than 1000nm, the ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10, and the water permeability of the washable, waterproof and breathable composite material is greater than 5000 g / (m 2 .24h).

2. The washable, waterproof and breathable composite material according to claim 1, characterized in that: The first ceramic particles and the second ceramic particles satisfy at least one of the following characteristics: (1) The particle size D50 of the first ceramic particles is 100 nm to 1000 nm, preferably 400 nm to 600 nm; (2) The particle size D50 of the second ceramic particles is 100 nm to 1000 nm, preferably 200 nm to 600 nm; (3) The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 1-3.

3. The washable, waterproof and breathable composite material according to claim 1, characterized in that: The ratio of the particle size D50 to D10 of the first ceramic particles is 1 to 3, preferably 1 to 1.5; The ratio of the particle sizes D50 and D10 of the second ceramic particles is 1-3, preferably 1-1.

5.

4. The washable, waterproof and breathable composite material according to claim 1, characterized in that: The microporous membrane comprises a polyolefin microporous membrane. Optionally, the polyolefin microporous membrane is selected from a polyethylene microporous membrane or a polypropylene microporous membrane.

5. The washable, waterproof and breathable composite material according to claim 1, characterized in that: The washable, waterproof and breathable composite material also meets at least one of the following characteristics: (1) The thickness of the microporous membrane is 1 μm to 30 μm, preferably 5 μm to 20 μm; (2) The porosity of the microporous membrane is greater than 30%, preferably 40% to 70%; (3) The average pore size of the microporous membrane is less than 100 nm, preferably 10 nm to 50 nm; (4) The moisture permeability of the washable, waterproof and breathable composite material is not less than 50% of the moisture permeability of the microporous membrane; (5) The specific surface area of ​​the washable, waterproof and breathable composite material is 10m 2 / g~60m 2 / g, preferably 40m 2 / g~60m 2 / g; (6) The initial hydrostatic pressure of the washable, waterproof and breathable composite material is greater than 20 Kpa, preferably 150 Kpa to 200 Kpa, and the hydrostatic pressure drop after five washes does not exceed 40% of the initial value.

6. The washable, waterproof and breathable composite material according to claim 1, characterized in that: The washable, waterproof and breathable composite material also meets at least one of the following characteristics: (1) The first ceramic particles include one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles and zirconium oxide particles; (2) the second ceramic particles include one or more of aluminum oxide particles, titanium oxide particles, silicon oxide particles and zirconium oxide particles; (3) The hydrophilic polymer includes one or more of polyurethane, polyamide and polyester.

7. The washable, waterproof and breathable composite material according to any one of claims 1 to 6, characterized in that: The washable, waterproof and breathable composite material also meets at least one of the following characteristics: (1) The thickness of the ceramic coating is 0.5 μm to 3 μm; (2) The thickness of the hydrophilic coating is 0.5 μm to 3 μm; (3) The weight of the ceramic coating is 0.8 g / m 2 ~1.2g / m 2 ; (4) The weight of the hydrophilic coating is 0.5 g / m 2 ~3.2g / m 2 .

8. A method for preparing a washable, waterproof and breathable composite material, characterized in that: The method for preparing the washable, waterproof and breathable composite material according to any one of claims 1 to 7 comprises the following steps: Prepare a ceramic slurry including first ceramic particles, apply the ceramic slurry on one or both sides of the microporous membrane, and dry it to form a ceramic coating; A composite slurry including second ceramic particles and a hydrophilic polymer is prepared, the composite slurry is coated on the ceramic coating, and then cured to form a hydrophilic coating.

9. The preparation method according to claim 8, characterized in that: The ceramic slurry comprises the following components based on a total amount of 100 parts by weight: 1-5 parts by weight of first ceramic particles; Adhesive 0.1~6 parts by weight; Dispersant 0.1~1 parts by weight; Deionized water balance.

10. The preparation method according to claim 8, characterized in that: The composite slurry comprises the following components based on a total amount of 100 parts by weight: 10-20 parts by weight of second ceramic particles; 2-8 parts by weight of microporous lignin; Hydrophilic polymer 10-20 parts by weight Dispersant 0.2~0.6 parts by weight; 2.8-5.0 parts by weight of cross-linking agent; Solvent Residue.

11. A waterproof and breathable fabric, characterized in that: The invention comprises a fabric and the washable, waterproof and breathable composite material according to any one of claims 1 to 7, or a washable, waterproof and breathable composite material prepared by the preparation method according to any one of claims 8 to 10, wherein the washable, waterproof and breathable composite material is arranged on a surface of one side of the fabric along its thickness direction.

12. The waterproof and breathable fabric according to claim 11, characterized in that: The moisture permeability of the waterproof and breathable fabric is greater than 5000 g / (m 2 .24h), the initial hydrostatic pressure of the waterproof and breathable fabric is greater than 20Kpa, preferably 150Kpa~200Kpa, and the hydrostatic pressure drop of the waterproof and breathable fabric after washing 5 times does not exceed 40% of the initial value.

13. A method for preparing a waterproof and breathable fabric, characterized in that: The steps include: laminating a microporous membrane on a surface of one side of the fabric in the thickness direction; and The ceramic coating and the hydrophilic coating of the washable, waterproof and breathable composite material are prepared according to the preparation method of the washable, waterproof and breathable composite material according to any one of claims 8 to 10.

14. A kind of clothing, characterized in that: At least part of the clothing is made of the waterproof and breathable fabric according to any one of claims 11 to 12, or the waterproof and breathable fabric prepared by the preparation method according to claim 13.

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