阅读说明：本技术 一种防水透湿膜与织物点胶复合的方法 (Dispensing and compounding method of waterproof moisture-permeable film and fabric ) 是由 张志成 张丽 马晓飞 于 2021-07-05 设计创作，主要内容包括：本发明涉及防水透湿织物技术领域,具体涉及一种防水透湿膜与织物点胶复合的方法,所述的方法包括：利用粘合剂对织物进行浸渍处理,然后将浸渍有粘合剂的织物输送到挤出流延涂覆设备中进行TPU流延涂覆,经冷却处理后采用针扎的方式在织物的TPU膜层上形成微孔结构,接着再利用雕刻辊将热熔胶转移至织物的TPU膜层上,然后与防水透湿膜层压复合在一起,形成防水透湿织物；本发明通过在织物临近防水透湿膜的一侧设置亲水透湿的TPU膜层,避免了现有技术中聚四氟乙烯本身的化学惰性导致其与织物复合效果差,容易分层的问题；TPU膜层本身具有较好的弹性,通过上述结构的设置,相当于在现有织物与聚四氟乙烯膜之间设置了弹性层,提高了层压织物的柔软度。(The invention relates to the technical field of waterproof moisture permeable fabrics, in particular to a dispensing compounding method of a waterproof moisture permeable film and a fabric, which comprises the following steps: the fabric is impregnated by using an adhesive, then the fabric impregnated with the adhesive is conveyed to extrusion casting coating equipment for TPU casting coating, a microporous structure is formed on a TPU film layer of the fabric in a needle prick mode after cooling treatment, then a carving roller is used for transferring a hot melt adhesive to the TPU film layer of the fabric, and then the hot melt adhesive and a waterproof moisture permeable film are laminated and compounded together to form the waterproof moisture permeable fabric; according to the invention, the hydrophilic moisture permeable TPU film layer is arranged on one side of the fabric close to the waterproof moisture permeable film, so that the problems of poor compound effect of polytetrafluoroethylene and fabric and easiness in layering caused by chemical inertia of the polytetrafluoroethylene in the prior art are solved; the TPU film layer has good elasticity, and through the arrangement of the structure, the elastic layer is equivalently arranged between the existing fabric and the polytetrafluoroethylene film, so that the softness of the laminated fabric is improved.)

1. A method for dispensing and compounding a waterproof moisture-permeable film and fabric is characterized by comprising the following steps: the fabric is impregnated by using an adhesive, then the fabric impregnated with the adhesive is conveyed to extrusion casting coating equipment for TPU casting coating, a penetrating microporous structure is formed on a TPU film layer of the fabric in a needle punching mode after cooling treatment, then a carving roller is used for transferring hot melt adhesive to the TPU film layer of the fabric, and then the hot melt adhesive and a waterproof moisture permeable film are laminated and compounded together to form the waterproof moisture permeable fabric.

2. The method as claimed in claim 1, wherein the dipping treatment comprises immersing the fabric in a liquid storage tank containing the binder for ultrasonic dipping at an ultrasonic frequency of 30-40Hz, rolling the ultrasonically dipped fabric by a compression roller, transferring into an oven, and drying at a temperature of 100-125 ℃.

3. The method according to claim 2, wherein the temperature of the ultrasonic immersion is 40-70 ℃ and the time is 20-30 min.

4. The method of claim 1, wherein the adhesive is an aqueous polyurethane-based adhesive.

5. The method as claimed in claim 1, wherein the TPU casting coating process conditions include an infrared pre-baking temperature of 120-²。

6. The method of claim 1, wherein the pore size of the microporous structure is 20-50 μm.

7. The method as claimed in claim 1, wherein the lamination compounding conditions include a lamination temperature of 120 ℃ and 130 ℃, a lamination pressure of 0.30 to 0.50MPa, and a lamination time of 15 to 30 s.

8. The method according to claim 1, wherein the coating speed of the carving roller on the TPU film layer is 35-40m/min, and the coating amount is 10-15g/m²。

9. The method as claimed in claim 1, wherein after lamination and lamination, a drying cylinder is used for drying treatment, and the temperature of the drying treatment is 110-150 ℃.

10. The method as claimed in claim 1, wherein the lamination is followed by curing treatment at 90% humidity and 30-40 ℃ for 24-36 hours.

Technical Field

The invention relates to the technical field of waterproof moisture permeable fabrics, in particular to a dispensing compounding method of a waterproof moisture permeable film and a fabric.

Background

With the improvement of the consumption level of people, personalized, differentiated and functionalized textile products and clothes are favored by consumers, and particularly, waterproof moisture permeable fabrics in recent years, namely, the waterproof moisture permeable fabrics are functional fabrics which can allow gaseous water molecules to pass through and can prevent liquid water from permeating, and are widely applied to outdoor products such as outdoor clothing, raincoats, tents and the like. The main principle of the waterproof and moisture permeable fabric is that water in different states has different diameters, so that the spreading difference is caused, specifically, the diameter of a water vapor molecule is 0.0004 micron, the diameter of light mist with the smallest diameter in rainwater is 20 microns, the diameter of capillary rain is as high as 400 microns, and if a film with pore diameters between water vapor and rainwater can be manufactured, the waterproof and moisture permeable effects can be realized.

At present, the realization of waterproof moisture permeable fabrics can be roughly divided into the following steps according to different processing modes: coated fabrics, high density fabrics and laminated fabrics; wherein, coated fabric means fabric is coated directly or indirectly to make the fabric waterproof, the moisture permeability is obtained by producing micropore structure or making it hydrophilic, according to its waterproof moisture permeability mechanism, can be subdivided into three types: microporous coating methods, hydrophilic coating methods, and microporous hydrophilic bonding methods. The production and processing process of the coated fabric mainly adopts an organic solvent system, the cost of solvent recovery equipment is high, and environmental pollution is easily caused; after the fabric coating treatment, the drapability and softness become poor; poor waterproof durability and poor adhesion fastness; the process of producing a continuous uniform microporous structure during the microporous coating process is difficult to control.

The high-density fabric is a high-density fabric adopting superfine fibers, but the production difficulty of the high-density fabric is higher, so that the high-density finished fabric is produced by a finishing means, the raw material fibers of the high-density fabric have a skin-core structure, the core layer is thick high-shrinkage fibers, and the skin layer is a superfine raw material. Such as "Sorela" developed by imperial corporation and using polyester sheath-core differential shrinkage fiber as raw material, and "Naiva" produced by 13 youth cheka corporation and using ethylene and vinyl alcohol copolymerized filament as core layer and nylon as skin layer. The high-density fabric has the advantages of simple process, mainly due to the change of yarn and silk fineness, good drapability and moisture permeability of the prepared clothes, but low water pressure resistance of the fabric, and greatly limited application range. In addition, because the fabric density is high, the tearing performance of the fabric is poor, the spinning needs to be specially processed, the production cost is high, and the processing is difficult.

The laminated fabric is represented by gortex moisture permeable material manufactured by gore company and japanese wet chemical company, polytetrafluoroethylene resin is taken as a film before being melted, then the film is heated to a melting point (327 ℃), then the film is rapidly stretched in the longitudinal and transverse directions, after cooling, a thermosetting cobweb-shaped fine porous structure is formed, the thickness of the film is about 25 microns, the porosity is 82 percent (90 hundred million micropores with the pore diameters of 0.2-5 microns communicated with each other are arranged in 1 square inch on average), the film is adhered to nylon silk or polyester fabric, the gortex first-generation water repellent, waterproof and moisture permeable fabric is formed, but the antifouling property of the product is poor, the waterproof and moisture permeable performance is obviously reduced after being polluted by sweat fat, hair oil and the like, meanwhile, the washing resistance of the product is poor, a surfactant in a washing agent can be soaked into the film to block the micropores, so that the waterproof performance is reduced, the same situation is also true in dry cleaning; the second generation gortex product is made by sticking the polytetrafluoroethylene film between two layers of fabrics, so that the substances such as grease and the like can be completely shielded, and the waterproof performance of the product can not be influenced by washing or dry cleaning; and because the surface of the fabric has a composite structure, the waterproof performance is not reduced by the influence of a surfactant, and the water pressure resistance value of the fabric reaches 7 kilograms/centimeter². However, because of the chemical inertness of polytetrafluoroethylene, polytetrafluoroethylene is difficult to be laminated with fabrics well, and often needs to be laminated with other hydrophilic film layers to form a composite film, and then is laminated and compounded with fabrics; moreover, because of the chemical inertness of polytetrafluoroethylene itself, it is thinThe film is difficult to degrade by nature, the combustion temperature is as high as 405 ℃, and the large-scale application causes the film to be gradually used as an environment killer.

The proper lamination technology is the key for producing high-quality laminated fabrics, and the hot-melt bonding technology using moisture-curing polyurethane hot melt adhesive is developed rapidly at present, and has the advantages of wide application range, almost no pollution to the environment and low energy consumption. However, existing laminate fabrics still have deficiencies in softness of the overall product; in addition, existing laminate fabric structures are difficult to produce at faster rates, resulting in inefficient production.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a method for compounding a waterproof moisture-permeable film and fabric by dispensing, so that the processed laminated fabric has better softness, and the production efficiency of the laminated fabric is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for compounding a waterproof moisture-permeable film with fabric by dispensing comprises the following steps: the fabric is impregnated by using an adhesive, then the fabric impregnated with the adhesive is conveyed to extrusion casting coating equipment for TPU casting coating, a penetrating microporous structure is formed on a TPU film layer of the fabric in a needle punching mode after cooling treatment, then a carving roller is used for transferring hot melt adhesive to the TPU film layer of the fabric, and then the hot melt adhesive and a waterproof moisture permeable film are laminated and compounded together to form the waterproof moisture permeable fabric.

In a further technical scheme, the dipping treatment comprises the specific steps of immersing the fabric in a liquid storage tank containing an adhesive for ultrasonic dipping, wherein the ultrasonic frequency is 30-40Hz, rolling the fabric subjected to ultrasonic dipping by using a compression roller, then transferring into an oven, and drying at the temperature of 100-125 ℃.

In a further technical scheme, the temperature of ultrasonic impregnation is 40-70 ℃, and the time is 20-30 min.

In a further technical scheme, the adhesive is an aqueous polyurethane system adhesive.

In a further technical scheme, the TPU casting coating process conditions comprise that the infrared pre-drying temperature is 120-140 ℃, the melt extrusion temperature is 180-190 ℃, the cooling roller temperature is 50-55 ℃, the production line speed is 20-30m/min, and the extrusion casting coating amount is 50-80g/m²。

In a further technical scheme, the pore diameter of the microporous structure is 20-50 μm.

In a further technical scheme, the lamination compounding conditions comprise that the temperature during lamination is 120-130 ℃, the pressure during lamination is 0.30-0.50MPa, and the lamination time is 15-30 s.

In a further technical scheme, the gluing speed of the engraving roll on the TPU film layer is 35-40m/min, and the gluing amount is 10-15g/m²。

In a further technical scheme, after lamination and compounding, a drying cylinder is used for drying treatment, and the temperature of the drying treatment is 110-150 ℃.

In a further technical scheme, after lamination and compounding, curing treatment is carried out for 24-36 hours under the conditions of 90% humidity and 30-40 ℃.

Compared with the prior art, the invention has the following technical effects:

according to the method for dispensing and compounding the waterproof moisture-permeable film and the fabric, the hydrophilic moisture-permeable TPU film layer is arranged on one side, close to the waterproof moisture-permeable film, of the fabric, so that the problems that in the prior art, the polytetrafluoroethylene is poor in compounding effect with the fabric and easy to layer due to the chemical inertia of the polytetrafluoroethylene are solved; and, TPU rete itself has better elasticity, through the setting of above-mentioned structure, is equivalent to having set up the elastic layer between current fabric and polytetrafluoroethylene membrane, has improved the compliance of lamination fabric.

According to the method for dispensing and compounding the waterproof moisture-permeable film and the fabric, the penetrating microporous structure is arranged on the TPU film layer of the fabric, the microporous structure can be used as a moisture-permeable pore, the moisture permeability of the waterproof moisture-permeable film is prevented from being influenced, the bonding area of the TPU film layer and the waterproof moisture-permeable film is increased, and the bonding and linking effect of the hot melt adhesive is improved.

According to the method for dispensing and compounding the waterproof moisture-permeable film and the fabric, the hot melt adhesive is transferred to the TPU film layer of the fabric through the engraving roller instead of being transferred to the waterproof moisture-permeable film as in the traditional method, so that the influence on the microporous structure of the waterproof moisture-permeable film is avoided, the excessive tensile stress generated on the waterproof moisture-permeable film is also avoided, and the influence on the appearance and the waterproof moisture-permeable performance of a laminated fabric product is reduced; moreover, the inventor of the application finds that the hot melt adhesive is transferred to the TPU film layer of the fabric by the engraving roll, compared with the traditional method that the hot melt adhesive is transferred to the waterproof moisture-permeable film, the gluing speed is improved to a certain extent, and further the production efficiency is improved, specifically, the traditional gluing speed is not more than 30m/min, and the gluing speed of the invention can be as high as 35-40 m/min.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified with the specific embodiments.

In the invention, the waterproof moisture-permeable membrane is a membrane with a micro-porous structure prepared in advance, such as a polytetrafluoroethylene membrane; the fabric can be selected from polyester cloth, nylon cloth, cotton cloth, polyester/nylon fiber blended gauze and other blended gauze of fibers with different compositions; the laminated fabric is prepared by carrying out glue dispensing compounding on the laminated fabric and a waterproof moisture permeable film, so that the laminated fabric has the waterproof moisture permeable function. However, in the prior art, the softness of the laminated fabric obtained by laminating and compounding the polytetrafluoroethylene film and the fabric is still insufficient, and the conventional method is to coat the hot melt adhesive on the polytetrafluoroethylene film and then compound the fabric on the polytetrafluoroethylene film, because the hot melt adhesive has certain viscosity and bonding strength, a certain pulling force is needed to separate the polytetrafluoroethylene film and the engraving roll in the process of transferring the hot melt adhesive to the polytetrafluoroethylene film by the engraving roll, when the production speed is higher, the required pulling force is higher, but the thickness of the polytetrafluoroethylene film is very thin, generally 25 μm, and has the characteristic of high porosity, so the gluing speed cannot be too high, otherwise the polytetrafluoroethylene film is stretched and deformed, the internal pore structure is damaged, and the appearance performance of the compounded polytetrafluoroethylene film and fabric is not only affected, it also affects the waterproof and moisture-permeable properties of the laminated fabric.

Aiming at the problem, the invention provides a method for compounding a waterproof moisture-permeable film and fabric by dispensing, which comprises the following steps: the fabric is impregnated by using an adhesive, then the fabric impregnated with the adhesive is conveyed to extrusion casting coating equipment for TPU casting coating, a penetrating microporous structure is formed on a TPU film layer of the fabric in a needle punching mode after cooling treatment, then a carving roller is used for transferring hot melt adhesive to the TPU film layer of the fabric, and then the hot melt adhesive and a waterproof moisture permeable film are laminated and compounded together to form the waterproof moisture permeable fabric.

According to the method provided by the invention, the hydrophilic moisture permeable TPU film layer is arranged on one side of the fabric close to the waterproof moisture permeable film, so that the problems of poor compound effect of polytetrafluoroethylene and fabric and easiness in layering caused by chemical inertia of the polytetrafluoroethylene in the prior art are solved; moreover, the TPU film layer has good elasticity, and through the arrangement of the structure, the elastic layer is arranged between the existing fabric and the polytetrafluoroethylene film, so that the softness of the laminated fabric is improved; particularly, through arranging the penetrating microporous structure on the TPU film layer of the fabric, the microporous structure can be used as a moisture permeable pore, the moisture permeability of the waterproof moisture permeable film is prevented from being influenced, the bonding area of the TPU film layer and the waterproof moisture permeable film is increased, and the bonding and linking effect of the hot melt adhesive is improved. Furthermore, in the method provided by the invention, the hot melt adhesive is transferred to the TPU film layer of the fabric through the engraving roller, so that the problem that the gluing speed is limited when the hot melt adhesive is transferred to the polytetrafluoroethylene film is avoided, the gluing speed can reach 35-40m/min, and the production efficiency is obviously improved.

According to the method provided by the invention, the dipping treatment comprises the specific steps of immersing the fabric into a liquid storage tank containing the adhesive for ultrasonic dipping, wherein the ultrasonic frequency is 30-40Hz, rolling the fabric subjected to ultrasonic dipping by using a compression roller, then transferring into an oven, and drying at the temperature of 100-125 ℃. By adopting the ultrasonic impregnation treatment mode, the impregnation effect of the adhesive on the fabric is obviously improved. Further, according to the present invention, the ultrasonic impregnation conditions can be selected within a wide range, and preferably, in the present invention, the ultrasonic impregnation temperature is 40 to 70 ℃ and the time is 20 to 30 min.

According to the method provided by the invention, the adhesive is an aqueous polyurethane system adhesive, and specifically, the aqueous polyurethane system adhesive comprises the following raw material components in parts by weight: 70-80 parts of aqueous polyurethane dispersoid, 10-15 parts of adhesion promoter, 0.03-0.07 part of defoaming agent and 0.10-0.30 part of wetting agent; the waterborne polyurethane dispersion is prepared from raw materials including an NCO-terminated prepolymer, a polyhydroxy polyamine chain extender and a hydrophilic chain extender, wherein the NCO-terminated prepolymer is obtained by reacting polyol and diisocyanate;

the polyamine chain extender containing polyhydroxy is obtained by the reaction of acrylic acid hydroxy ester and polyamine,

the hydrophilic chain extender is a hydrophilic compound containing amino, and particularly preferably N, N-dimethyldiethylenetriamine or N- (2-aminoethyl) -2-aminoethanesulfonic acid.

The adhesion promoter is emulsion prepared by adding an emulsifier for dispersion after a hydrophilic compound containing amino reacts with siloxane containing isocyanate groups; specifically, the hydrophilic compound containing amino groups is selected from one of N- (2-aminoethyl) -2-aminoethanesulfonic acid, N- (3-aminopropyl) -2-aminoethanesulfonic acid and N- (3-aminopropyl) -3-aminopropanesulfonic acid, and the siloxane containing isocyanate groups is selected from one of 3-isocyanatopropyltrimethoxysilane and 3-isocyanatopropyltriethoxysilane; and the molar ratio of the amino group in the amino group-containing hydrophilic compound to the NCO in the isocyanate group-containing siloxane is 1: (1 to 1.3), preferably 1: (1 to 1.1), more preferably 1: 1.05.

the emulsifier is selected from one of alkyl alcohol polyoxyethylene ether ammonium sulfate, alkylphenol polyoxyethylene ether sodium sulfate and allyloxy alkyl alcohol polyoxyethylene ether ammonium sulfate.

In the invention, the defoaming agent is selected from one of BYK-020, BYK-022 or BYK-024; the wetting agent is polyether modified polysiloxane wetting agent, and concretely comprises BYK-349 which is available from Bike chemical.

In a specific embodiment of the present invention, the adhesive is prepared by the following steps:

stirring and mixing polyol, diisocyanate and acetone at the temperature of 80-90 ℃ for 3 hours to obtain an NCO-terminated prepolymer, dissolving the NCO-terminated prepolymer into acetone, cooling to 40 ℃, adding an aqueous solution in which a polyhydroxy polyamine chain extender and a hydrophilic chain extender are dissolved into the NCO-terminated prepolymer, stirring and mixing for 20 minutes, adding deionized water for dispersing, and distilling out the acetone to obtain an aqueous polyurethane dispersion; and adding the prepared aqueous polyurethane dispersion, the adhesion promoter, the defoaming agent and the wetting agent into a reaction kettle, and stirring for 20 minutes to obtain the adhesive.

According to the method provided by the invention, the process conditions of the TPU casting coating comprise that the infrared pre-drying temperature is 120-140 ℃, the melt extrusion temperature is 180-190 ℃, the temperature of a cooling roller is 50-55 ℃, the production line speed is 20-30m/min, and the extrusion casting coating amount is 50-80g/m²。

According to the method provided by the invention, through arranging the through microporous structure on the TPU film layer of the fabric, the arrangement of the microporous structure can be used as a moisture permeable pore, the influence of the arrangement of the elastic layer on the moisture permeability of the waterproof moisture permeable film is avoided, the bonding area of the TPU film layer and the waterproof moisture permeable film is increased, in the specific bonding process, dispensing is carried out on the TPU film layer through the carving roller, glue can be partially soaked into the microporous structure, and the bonding effect of the TPU film layer and the waterproof moisture permeable film is improved, namely the bonding and connecting effect of the hot melt adhesive is improved.

According to the method provided by the invention, the lamination compounding conditions comprise that the temperature during lamination is 120-130 ℃, the pressure during lamination is 0.30-0.50MPa, and the lamination time is 15-30 s.

In the invention, the gluing speed of the engraving roller on the TPU film layer is 35-40m/min, and the gluing amount is 10-15g/m²。

In the invention, after lamination and compounding, a drying cylinder is used for drying treatment, and the temperature of the drying treatment is 110-150 ℃.

In the invention, after lamination and compounding, curing treatment is carried out for 24-36 hours under the conditions of 90% humidity and 30-40 ℃.

The method for dispensing and compounding the waterproof moisture-permeable film and the fabric provided by the invention is further described by specific examples.

In the following examples, the waterproof moisture-permeable film is a polytetrafluoroethylene film with a thickness of 25 μm and a porosity of 82%; the fabric is made of nylon fabric.

Example 1

A method for dispensing and compounding a waterproof moisture-permeable film and fabric comprises,

soaking the fabric by using an adhesive, wherein the soaking treatment specifically comprises the steps of immersing the fabric in a liquid storage tank containing the adhesive for ultrasonic soaking at the temperature of 50 ℃ for 25min at the ultrasonic frequency of 30Hz, rolling the fabric subjected to ultrasonic soaking by using a press roller, and the gum dipping amount of the adhesive on the fabric after rolling is 20g/m²(ii) a Then transferring the mixture into a drying oven, and drying the mixture at the temperature of 110 ℃;

the adhesive is prepared by the following method: adding 200g of dehydrated poly (1, 4-butylene adipate) diol (OH value is 56mg KOH/g), 28.35g of hexamethylene diisocyanate and 25g of acetone into a reaction container, introducing nitrogen, stirring and mixing at 85 ℃ for 3 hours to obtain an NCO-terminated prepolymer, dissolving the NCO-terminated prepolymer in 400g of acetone, cooling to 40 ℃, adding an aqueous solution in which 20g of polyhydroxy polyamine chain extender and 5g N, N-dimethyldiethylenetriamine are dissolved into the NCO-terminated prepolymer, stirring and mixing for 20 minutes, adding 300g of deionized water for dispersing, and removing the acetone through distillation to obtain an aqueous polyurethane dispersion; adding 75 parts of the prepared aqueous polyurethane dispersoid, 12 parts of adhesion promoter, BYK-0200.05 parts of defoaming agent and BYK-3490.2 parts of wetting agent into a reaction kettle, and stirring for 20 minutes to obtain the adhesive;

the polyhydroxy polyamine chain extender is prepared by mixing 232g of ethylenediamine and 960g of hydroxyethyl methacrylate, stirring, heating to 80 ℃, keeping the temperature for reaction for 2 hours, heating to 100 ℃, and keeping the temperature for 1 hour.

The adhesion promoter is prepared by adding 259g of 3-isocyanate propyl trimethoxy silane to 198g of N- (3-aminopropyl) -3-amino propane sulfonate aqueous solution at 40 ℃, reacting for 25 minutes, adding 7g of ammonium alkyl alcohol polyoxyethylene ether sulfate, and dispersing at the speed of 1000 revolutions per minute to obtain emulsion.

And then conveying the fabric impregnated with the adhesive into extrusion casting coating equipment for TPU casting coating, wherein the process conditions of the TPU casting coating comprise that the infrared prebaking temperature is 130 ℃, the melt extrusion temperature is 190 ℃, the temperature of a cooling roll is 55 ℃, the production line speed is 25m/min, and the extrusion casting coating amount is 60g/m²；

After cooling treatment, a penetrating microporous structure is formed on a TPU film layer of the fabric in a needle punching mode, and the pore diameter of the microporous structure is 40 mu m; and then transferring the hot melt adhesive to a TPU film layer of the fabric by using an engraving roll, wherein the gluing speed of the engraving roll on the TPU film layer is 38m/min, and the gluing amount is 12g/m²(ii) a The hot melt adhesive is moisture-curing polyurethane hot melt adhesive, and the viscosity of the hot melt adhesive is 5 Pa.s.

Laminating with a waterproof moisture-permeable film under the conditions that the temperature is 125 ℃, the pressure is 0.45MPa and the laminating time is 20 s; after lamination and compounding, drying by using a drying cylinder, wherein the temperature of the drying treatment is 120 ℃; after lamination and compounding are finished, curing for 30 hours under the conditions of 90% humidity and 35 ℃; forming the waterproof and moisture permeable fabric.

Tests prove that the moisture permeability of the waterproof moisture permeable fabric prepared by the embodiment is as high as 10513g/m²24h (according to the drying cup test in GB/T12704-91) and a water pressure resistance of 75KPa (according to the standard of GB 4744-84).

Compared with the laminated fabric in the publication number of CN101532257B or CN100340397C, the waterproof moisture permeable fabric has obviously improved moisture permeability, and when the waterproof moisture permeable film and the fabric are compounded by dispensing, a polyurethane coating does not need to be compounded on a polytetrafluoroethylene film, so that the influence of redundant working procedures on the polytetrafluoroethylene film is avoided, and the performance of a product is ensured.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.