Cold-resistant fiber membrane waterproof and breathable fabric and its preparation process

Abstract

The invention relates to the field of fabrics and preparation processes thereof, and particularly to a cold-resistant fiber membrane waterproof and breathable fabric and a preparation process thereof. The cold-resistant fiber membrane waterproof and breathable fabric comprises, from top to bottom, an upper base fabric layer, a waterproof and breathable layer and a lower base fabric layer. The glue-applied sides of the upper base fabric layer and the lower base fabric layer are both subjected to a napping treatment. The fluff on the surface of the base fabric can significantly improve the bonding strength between the upper base fabric layer and the waterproof and breathable layer, thereby improving the water resistance. The waterproof and breathable layer contains microporous fibers to improve the moisture permeability of the glue layer, and the fluff is embedded in the waterproof and breathable layer to increase the bonding area between the base fabric and the waterproof and breathable layer, thereby improving the moisture permeability of the fabric. The waterproof and breathable layer is mixed with microporous fibers, which can significantly improve the strength of the waterproof and breathable layer while ensuring moisture permeability. At the same time, the waterproof and breathable layer is bonded to the upper and lower base fabrics respectively using a base glue and a surface glue and then compounded. This structure and process can effectively improve the strength of the waterproof and breathable membrane.

Description

Technical Field

[0001] The present invention relates to the field of fabrics and preparation processes thereof, and in particular to cold-resistant fiber membrane waterproof and breathable fabrics and preparation processes thereof. Background Art

[0002] The waterproof and breathable principle of microporous breathable fabrics is that traditional waterproof and breathable film materials are internally distributed with dense and fine mesh micropores with a pore size at the submicron level. Generally, water droplets are about 1,000 times the diameter of the pores, while the water molecules evaporated from the human body are thousands of times smaller than such micropores. Therefore, water droplets cannot penetrate the film material, but human body water vapor molecules can pass through the film micropores, thus achieving the function of waterproof and breathable.

[0003] Winter outdoor clothing not only provides warmth but also has high requirements for waterproof and breathable properties. If sweat cannot be discharged to the outside in a timely manner, it can easily lead to hypothermia. However, developing a fabric that combines warmth, waterproofness, and breathable properties is very difficult. Waterproof and breathable fabrics prepared using traditional multi-layer composite processes have the following problems: 1. The waterproof and breathable membrane and the base fabric need to be laminated using hot melt adhesive. The hot melt adhesive coating amount is generally 9-11g / m2. Since hot melt adhesive does not have micropores, the application of hot melt adhesive, whether continuous or dotted, will lead to a decrease in the moisture permeability of the fabric. In addition, due to the heavy weight of winter fabrics, the hot melt adhesive easily falls off under the action of its own weight and after washing, resulting in localized bubbles in the fabric, poor water resistance and durability, and failure to meet the quality requirements of clothing. 2. The contact area between the waterproof and breathable membrane and the base fabric is small. In particular, the hot melt adhesive between the base fabric and the waterproof and breathable membrane further affects their moisture permeability, resulting in the actual moisture permeability of the fabric being lower than that of the waterproof and breathable membrane. In view of the above problems, this case was initiated. Summary of the Invention

[0004] An object of the present invention is to solve at least the above problems by using a cold-resistant fiber membrane waterproof and breathable fabric and a preparation process thereof.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a cold-resistant fiber membrane waterproof and breathable fabric, characterized in that it includes, from top to bottom, an upper base fabric layer, a waterproof and breathable layer, and a lower base fabric layer.

[0006] Preferably, the waterproof and breathable layer includes a surface adhesive and a base adhesive bonded to each other, the surface adhesive adheres to the lower surface of the upper base fabric layer, and the base adhesive adheres to the upper surface of the lower base fabric layer.

[0007] Preferably, micropores are distributed on the surface adhesive and the base adhesive, the surface adhesive contains skin-core microporous fibers, and the base adhesive contains special-shaped fibers.

[0008] Preferably, the sheath-core microporous fiber is a sheath-core structure, comprising a core layer and a sheath layer, the core layer being foamy and porous, the sheath layer being embedded with water-absorbing capillaries, and 3-4 grooves being distributed on the cross section of the shaped fiber.

[0009] Preferably, the upper surface of the upper base fabric layer and the lower surface of the lower base fabric layer are distributed with fluff, and the fluff is embedded in the surface rubber and the base rubber.

[0010] Preferably, the lower base fabric layer is a double-layer structure, and the lower base fabric layer includes a close-fitting fabric layer and a water storage layer from bottom to top. The water storage layer is bonded to the waterproof and breathable layer. The close-fitting fabric layer is made of polypropylene fiber with grooves distributed on it, and the water storage layer is made of cotton fiber.

[0011] Preferably, the fabric structure of the lower base fabric layer is a double-layer structure with the lower layer connected to the upper layer, the basic structure of the surface layer and the inner layer is a three-up and three-down twill structure, the warp and weft yarn arrangement ratio of the surface layer and the inner layer is 1:1, the binding structure is a one-up and five-down twill structure, the number of warp and weft structure cycles is 12, and the fabric structure of the upper base fabric layer is a plain weave.

[0012] The preparation process of the cold-resistant fiber membrane waterproof and breathable fabric includes the following steps:

[0013] Step a: preparing an upper base fabric and a lower base fabric, and preparing raw materials for the surface adhesive and the base adhesive;

[0014] Step b, performing water repellent treatment on the surfaces of the upper base fabric and the lower base fabric;

[0015] Step c, performing a napping treatment on the top surface of the lower base fabric and the bottom surface of the upper base fabric, so that the surfaces of the upper base fabric and the lower base fabric are fluffy;

[0016] Step d, preparing base glue and top glue;

[0017] Step e: applying the base glue to the upper surface of the lower base fabric, and applying the surface glue to the lower surface of the upper base fabric;

[0018] Step f: The base adhesive and the surface adhesive are bonded together, and the lower base fabric coated with the base adhesive and the upper base fabric coated with the surface adhesive are hot-pressed to obtain a cold-resistant fiber membrane waterproof and breathable fabric.

[0019] Preferably, in the step d, the polyurethane moisture permeable resin, the special-shaped fibers and dimethylformamide are evenly mixed to prepare the base adhesive, and the polyurethane moisture permeable resin, the core-skin microporous fibers and dimethylformamide are evenly mixed to prepare the surface adhesive.

[0020] Preferably, in the step e, the base glue is evenly applied to the upper surface of the lower base cloth, and through the immersion of the aqueous solution, dimethylformamide is dissolved and precipitated in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous base membrane mixed with special-shaped fibers, and then enters the oven for pre-drying; the surface glue is evenly applied to the lower surface of the upper base cloth, and through the immersion of the aqueous solution, dimethylformamide is dissolved and precipitated in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous surface membrane mixed with skin-core microporous fibers, and then enters the oven for pre-drying.

[0021] From the above description, it can be seen that the cold-resistant fiber membrane waterproof and breathable fabric provided by the present invention and its preparation process have the following beneficial effects: the upper base fabric layer and the lower base fabric layer are both napped on one side of the glue application, and the fluff on the surface of the base fabric can significantly improve its bonding strength with the waterproof and breathable layer, solve the problem of decreased bonding of the base fabric due to water-repellent finishing, and improve water resistance; the waterproof and breathable layer contains microporous fibers, which have good moisture permeability and improve the moisture permeability of the glue layer, and the fluff is embedded in the waterproof and breathable layer to increase the bonding area between the base fabric and the waterproof and breathable layer, thereby improving the moisture permeability of the fabric; the waterproof and breathable layer is mixed with microporous fibers, which can significantly improve the waterproof and breathable layer while ensuring moisture permeability. The strength of the water-breathable layer, at the same time, the waterproof and breathable layer adopts base glue and surface glue to bond with the upper and lower base fabrics respectively and then compound. This structure and process can effectively improve the strength of the waterproof and breathable membrane; the base glue adopts special-shaped fibers, high hygroscopicity, and has a certain water storage capacity, which can quickly absorb the moisture of the human body and store it, reducing the discomfort of the human body after load labor, and serving as a bridge between the lower base fabric layer and the surface glue to transfer moisture to the surface glue and the upper base fabric layer. The surface glue adopts skin-core microporous fiber, which is both hygroscopic and waterproof, helping to quickly discharge internal water vapor while preventing external large molecular water from entering the fabric. The hygroscopicity and water storage of the base glue and the surface glue form a gradient, which has good moisture removal efficiency and water storage capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the cold-resistant fiber membrane waterproof and breathable fabric of the present invention.

[0023] Figure 2 Schematic diagram of the structure of skin-core microporous fiber.

[0024] Figure 3 Schematic diagram of the structure of shaped fibers.

[0025] Figure 4 This is the fabric structure diagram of the lower base fabric layer. DETAILED DESCRIPTION

[0026] The present invention is further described below through specific embodiments.

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] like Figure 1 As shown, the cold-resistant fiber membrane waterproof and breathable fabric of the present invention comprises, from top to bottom, an upper base fabric layer 1, a waterproof and breathable layer 2, and a lower base fabric layer 3. Both the upper and lower base fabric layers 1 and 3 are napped on the glue-applied side. The nap on the base fabric surface significantly improves its bond strength with the waterproof and breathable layer 2, resolving the problem of decreased bond strength caused by water-repellent finishing. The waterproof and breathable layer 2 contains microporous fibers, which have excellent moisture permeability and enhance the moisture permeability of the adhesive layer. The nap is embedded in the waterproof and breathable layer 2, increasing the bonding area between the base fabric and the waterproof and breathable layer 2, thereby improving the moisture permeability of the fabric.

[0029] The waterproof and breathable layer 2 includes a surface adhesive 21 and a bottom adhesive 22 that are bonded to each other. The surface adhesive 21 is adhered to the lower surface of the upper base fabric layer 1 , and the bottom adhesive 22 is adhered to the upper surface of the lower base fabric layer 3 .

[0030] Micropores are distributed on the surface adhesive 21 and the base adhesive 22 . The surface adhesive 21 contains skin-core microporous fibers 4 , and the base adhesive 22 contains special-shaped fibers 5 .

[0031] like Figure 2 As shown, the core-skin microporous fiber 4 is a core-skin structure, and the core-skin microporous fiber 4 includes a core layer 41 and a skin layer 42. The core layer 41 is a foam porous shape, and the skin layer 42 is embedded with water-absorbing capillaries. Figure 3As shown, there are 3-4 grooves distributed on the cross section of the shaped fiber 5. The core layer 41 of the core-skin microporous fiber 4 is 1-2 microns thick, and many water-absorbing capillaries are embedded therein, while the core layer 41 is foamy and porous. Its water absorption is comparable to that of cotton fiber and wool, but its volume changes very little after absorbing water, and its expansion rate is low, so its morphological stability is good. Moreover, since the pore size of the micropores on the core-skin microporous fiber 4 is very small, it does not lose its waterproofness while ensuring good moisture permeability. Applying the core-skin microporous fiber 4 to the surface adhesive 21 can take into account both waterproofness and moisture permeability. However, since the shaped fiber 5 has multiple grooves, the width of the grooves of the shaped fiber 5 is much larger than the diameter of the micropores on the core-skin microporous fiber 4. Therefore, it has poorer waterproofness than the core-skin microporous fiber 4, but better moisture absorption. In summary, The base glue 22 adopts the special-shaped fiber 5, which has high hygroscopicity and certain water storage capacity. It can quickly absorb the moisture of the human body and store it, reducing the discomfort of the human body after heavy labor. It serves as a bridge between the lower base fabric layer 3 and the surface glue 21, and transfers moisture to the surface glue 21 and the upper base fabric layer 1. The surface glue 21 adopts the skin-core microporous fiber 4, which is both hygroscopic and waterproof. It helps to quickly discharge internal water vapor while preventing external large molecular water from entering the fabric. The hygroscopicity and water storage of the base glue 22 and the surface glue 21 have a gradient, and have good moisture removal efficiency and water storage capacity. Compared with traditional microporous film fabrics, in order to obtain good moisture permeability, the thickness of microporous film fabrics is lower, thereby reducing their strength and service life.

[0032] The present invention uses a double layer of adhesive to form a waterproof and breathable layer 2, which is relatively thick and contains sheath-core microporous fibers and shaped fibers 5, thereby effectively improving the strength and service life of the waterproof and breathable layer 2. While ensuring its strength, the waterproof and breathable layer 2 can maintain high moisture permeability and waterproofness due to the sheath-core microporous fibers 4 and shaped fibers 5 with excellent moisture permeability. In addition, the waterproof and breathable layer 2 of the double layer composite fiber sandwich structure of the present invention has good water washing resistance. After 10 washes, its hydrostatic pressure resistance decreases very little. The preparation process of the sheath-core microporous fibers 4 is roughly as follows: polyacrylonitrile is dissolved in dimethylformamide to prepare a spinning slurry. Then, a substance with a higher boiling point than dimethylformamide and soluble in water, such as glycerol or a glycerol derivative, is added to the slurry. The dimethylformamide first evaporates to form spun silk, and the high boiling point substance is washed away during the subsequent hot stretching, thereby forming a core layer 41 with many bubbles and a sheath layer 42 embedded with capillaries.

[0033] Fluff is distributed on the upper surface of the upper base fabric layer 1 and the lower surface of the lower base fabric layer 3 , and the fluff is embedded in the surface adhesive 21 and the base adhesive 22 .

[0034] The lower base fabric layer 3 is a double-layer structure, which includes a close-fitting fabric layer and a water storage layer from bottom to top. The water storage layer is bonded to the waterproof and breathable layer 2. The close-fitting fabric layer is made of polypropylene fiber with grooves distributed on it, and the water storage layer is made of cotton fiber. After the human body is under heavy load, the fabric's ability to transport sweat to the surrounding area must be as good as possible. Sweat adsorbed on the fabric will form a water film, which will then stick to the skin, causing a damp feeling and making the human body feel uncomfortable. Moreover, since sweat cannot be discharged in time, this anti-wetting phenomenon deteriorates the thermal insulation, causing the human body to feel cold and cramped. In extreme outdoor climates, it may even cause hypothermia. In the present invention, the close-fitting fabric layer has poor water storage performance. It uses polypropylene, a hydrophobic fiber, so it will not stick to the human body due to being soaked in water, and has good comfort. At the same time, the polypropylene fiber is distributed with grooves, which ensures that it is not easy to stick to the human body while maintaining good water transport performance. The water storage layer has good water storage performance. It uses cotton fiber with good hygroscopicity. Due to the difference in hygroscopicity, the water storage layer and the close-fitting fabric layer form a gradient difference, which promotes the movement of water from the close-fitting fabric layer to the water storage layer, thereby accelerating the outward transport of water, so that the close-fitting fabric layer in contact with the human body is kept as dry as possible.

[0035] like Figure 4 As shown, the fabric structure of the lower base fabric layer 3 is a double-layer structure with a bottom-up connection. The basic structure of the surface and inner layers is a three-up-three-down twill structure. The warp and weft yarn arrangement ratio of the surface and inner layers is 1:1. The binding structure is a one-up-five-down twill structure. The warp and weft structure cycles are 12. The fabric structure of the upper base fabric layer 1 is a plain weave. In the weave cycle, Arabic numerals are used to represent the surface warp and surface weft, and lowercase letters are used to represent the inner warp and inner weft. The weave symbol "■" is marked at the intersection of the surface warp and surface weft, and the weave symbol "X" is marked at the intersection of the inner warp and inner weft. The intersection of the inner warp and surface weft is the binding structure, with the binding symbol "●". The intersection of the surface warp and inner weft is represented by "0". The surface and inner layers of the lower base fabric are both three-up-three-down twill structures. Compared with the plain weave, due to the fewer interweaving times, the fabric is softer, more comfortable and fits better. It can also absorb human sweat better than the plain weave, keeping the human body moisturized. The body is dry and comfortable. Compared with the one-up-one-down twill weave and the two-up-two-down twill weave, the interweaving points of the fabric are smaller and it is softer and closer to the body. At the same time, due to the good fit of the fabric to the human body, the air flow between the base and the fabric is small, which can improve the warmth retention of the fabric. In order to ensure warmth retention, traditional fabrics need to increase the yarn thickness. In the present invention, the lower base fabric layer 3 adopts a double-layer structure with thinner yarn. However, its double-layer structure, combined with the waterproof and breathable layer 2 and the upper base fabric layer 1 to form a multi-layer composite fabric, has good warmth retention and waterproof and breathable properties, and is suitable for outdoor use in winter.

[0036] The preparation process of the cold-resistant fiber membrane waterproof and breathable fabric includes the following steps:

[0037] Step a: preparing the upper base fabric and the lower base fabric, and preparing the raw materials for the surface adhesive 21 and the base adhesive 22;

[0038] Step b, performing a water-repellent treatment on the surfaces of the upper base fabric and the lower base fabric; the base fabric is impregnated with a solution containing a waterproofing agent and then dried and shaped, and the waterproofing agent is selected from fluorine-based C8, C6 waterproofing agents, fluorine-free waterproofing agents, etc.; the fabric of the present invention can well ensure that water cannot penetrate, but the surface of the fabric will be wetted or absorb moisture by water, increasing the weight of the clothes and making them feel damp. At the same time, a layer of water film will form on the surface of the fabric, reducing the moisture permeability and making it easy to penetrate, so the outer base fabric layer must be subjected to a water-repellent finishing to ensure that the fabric is not wetted after being splashed with water, thereby improving the wearing experience; in addition, after the base fabric is subjected to the water-repellent treatment, problems such as shiny fabric surface and hard feel caused by glue seepage during post-processing can be avoided.

[0039] Step c: The top surface of the lower base fabric and the bottom surface of the upper base fabric are subjected to a napping treatment, resulting in a fluffy surface on the upper and lower base fabrics. After the water-repellent finishing, the surface properties of the outer base fabric layer change, and the surface tension decreases, resulting in a poorer bonding effect between the base fabric and the glue, thereby affecting the hydrostatic pressure resistance and washability of the laminated fabric. For waterproof and breathable fabrics that are traditionally laminated with hot melt adhesive, the hot melt adhesive easily falls off after washing, resulting in localized bubbles in the fabric, which cannot meet the quality requirements of the clothing. The surfaces of the upper and lower base fabrics are fluffed, and the fluff merges with the waterproof and breathable layer during the lamination process. The fluff is embedded in the waterproof and breathable layer, which can greatly improve the bonding strength between the base fabric and the waterproof and breathable layer, avoid bubbles during washing, and improve wash fastness. At the same time, the fluff is embedded in the waterproof and breathable layer, increasing the contact area between the base fabric and the waterproof and breathable layer, increasing the water transport rate, and accelerating the entry of moisture into the waterproof and breathable layer 2 and its transport to the outside.

[0040] Step d, preparing the base adhesive 22 and the top adhesive 21;

[0041] Step e: Apply the base glue 22 to the upper surface of the lower base cloth, and apply the surface glue 21 to the lower surface of the upper base cloth;

[0042] In step f, the base adhesive 22 and the surface adhesive 21 are bonded together, and the lower base fabric coated with the base adhesive 22 and the upper base fabric coated with the surface adhesive 21 are hot-pressed to produce a cold-resistant fiber membrane waterproof and breathable fabric. The base adhesive 22 and the surface adhesive 21 are bonded to each other through a hot-pressing lamination process. The base adhesive 22 and the surface adhesive 21 are instantly laminated under pressure. After hot pressing, the peel strength of the fabric is between 13.5 and 15.5 N. After washing 5 to 6 times, the peel strength remains above 9 N. The air permeability is greater than 5 mm / s, the moisture permeability is greater than 8000 g / m2·24h, and the hydrostatic pressure is greater than 5000 mm·H20.

[0043] In step d, the polyurethane moisture-permeable resin, the shaped fibers 5, and dimethylformamide are uniformly mixed to form a base adhesive 22, and the polyurethane moisture-permeable resin, the core-sheath microporous fibers 4, and dimethylformamide are uniformly mixed to form a surface adhesive 21. Before preparing the base adhesive 22 and the surface adhesive 21, the shaped fibers 5 and the core-sheath microporous fibers 4 are first soaked in dimethylformamide so that the dimethylformamide fills the grooves and micropores of the fibers. The polyurethane moisture-permeable resin is then added and mixed to form the base adhesive 22 and the surface adhesive 21. The dimethylformamide in the shaped fibers 5 and the core-sheath microporous fibers 4 is dissolved and precipitated during the subsequent aqueous solution soaking process.

[0044] In step d, the base glue 22 is evenly applied to the upper surface of the lower base fabric. By impregnation with an aqueous solution, dimethylformamide dissolves and precipitates in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous base film mixed with the special-shaped fibers 5, and enters an oven for pre-drying. The surface glue 21 is evenly applied to the lower surface of the upper base fabric. By impregnation with an aqueous solution, dimethylformamide dissolves and precipitates in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous surface film mixed with the skin-core microporous fibers 4, and enters an oven for pre-drying. The running speed of the upper and lower base fabrics and the size of the coating gap are controlled by tension so that the base glue 22 and the surface glue 21 are evenly coated on the base fabric.

[0045] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. Cold-resistant fiber membrane waterproof and breathable fabric, characterized by: From top to bottom, it includes an upper base fabric layer, a waterproof and breathable layer, and a lower base fabric layer. The waterproof and breathable layer includes a surface adhesive and a base adhesive bonded to each other. The surface adhesive is adhered to the lower surface of the upper base fabric layer, and the base adhesive is adhered to the upper surface of the lower base fabric layer. Micropores are distributed on the surface adhesive and the base adhesive. The surface adhesive contains skin-core microporous fibers, and the base adhesive contains special-shaped fibers.

2. The cold-resistant fiber membrane waterproof and breathable fabric according to claim 1, characterized in that: The sheath-core microporous fiber has a sheath-core structure and includes a core layer and a sheath layer. The core layer is foamy and porous. The sheath layer is embedded with water-absorbing capillaries. The cross section of the special-shaped fiber is distributed with 3-4 grooves.

3. The cold-resistant fiber membrane waterproof and breathable fabric according to claim 1, characterized in that: Fluff is distributed on the upper surface of the upper base fabric layer and the lower surface of the lower base fabric layer, and the fluff is embedded in the surface rubber and the base rubber.

4. The cold-resistant fiber membrane waterproof and breathable fabric according to claim 1, characterized in that: The lower base fabric layer is a double-layer structure, and the lower base fabric layer includes a close-fitting fabric layer and a water storage layer from bottom to top. The water storage layer is bonded to the waterproof and breathable layer. The close-fitting fabric layer is made of polypropylene fiber with grooves distributed on it, and the water storage layer is made of cotton fiber.

5. The cold-resistant fiber membrane waterproof and breathable fabric according to claim 1, characterized in that: The fabric structure of the lower base fabric layer is a double-layer structure with the lower layer connected to the upper layer. The basic structure of the surface layer and the inner layer is a three-up and three-down twill structure. The warp and weft yarn arrangement ratio of the surface layer and the inner layer is 1:

1. The binding structure is a one-up and five-down twill structure. The number of warp and weft structure cycles is 12. The fabric structure of the upper base fabric layer is a plain weave.

6. The process for preparing the cold-resistant fiber membrane waterproof and breathable fabric according to any one of claims 1 to 5, characterized in that: The steps include: Step a: preparing an upper base fabric and a lower base fabric, and preparing raw materials for the surface adhesive and the base adhesive; Step b, performing water repellent treatment on the surfaces of the upper base fabric and the lower base fabric; Step c, performing a napping treatment on the top surface of the lower base fabric and the bottom surface of the upper base fabric, so that the surfaces of the upper base fabric and the lower base fabric are fluffy; Step d, preparing base glue and top glue; Step e: applying the base glue to the upper surface of the lower base cloth, and applying the surface glue to the lower surface of the upper base cloth; Step f, laminating the base adhesive and the surface adhesive, hot-pressing the lower base fabric coated with the base adhesive and the upper base fabric coated with the surface adhesive to produce a cold-resistant fiber membrane waterproof and breathable fabric; In the step d, the polyurethane moisture permeable resin, the special-shaped fibers and dimethylformamide are uniformly mixed to obtain the base adhesive, and the polyurethane moisture permeable resin, the core-skin microporous fibers and dimethylformamide are uniformly mixed to obtain the surface adhesive.

7. The process for preparing the cold-resistant fiber membrane waterproof and breathable fabric according to claim 6, characterized in that: In the step e, the base glue is evenly applied to the upper surface of the lower base cloth, and through the immersion of the aqueous solution, dimethylformamide is dissolved and precipitated in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous base membrane mixed with special-shaped fibers, and then enters the oven for pre-drying; the surface glue is evenly applied to the lower surface of the upper base cloth, and through the immersion of the aqueous solution, dimethylformamide is dissolved and precipitated in the aqueous solution, while the polyurethane moisture-permeable resin solidifies into a microporous surface membrane mixed with skin-core microporous fibers, and then enters the oven for pre-drying.

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