Waterproof breathable warm-keeping fabric

Abstract

The invention relates to the technical field of functional textiles, and discloses a waterproof breathable warm-keeping fabric which comprises a fabric base layer and a breathable layer, and the fabric base layer is of a fabric structure; the breathable layer is hot-pressed on the fabric base layer; the breathable layer comprises a film layer which is obtained by processing a polymer strip in a mechanical stretching mode and is of a multi-layer overlapped microporous structure; wherein the difference value between the gram weight of the waterproof breathable warm-keeping fabric and the gram weight of the fabric base layer is smaller than or equal to 7g / m < 2 >, the breathability of the waterproof breathable warm-keeping fabric is larger than or equal to 5mm / s, the hydrostatic pressure is larger than or equal to 10kPa, and the number of down drills is smaller than or equal to 6. Therefore, under the condition of ensuring that the fabric has good air permeability, heat retention property and waterproofness, the overall weight can be effectively reduced, and the down-proof effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of functional textiles, and more particularly to a waterproof, breathable and warm-keeping fabric. Background Art

[0002] As people's living standards improve, down jackets have become a must-have winter clothing in some areas due to their lightness, warmth and other characteristics. Down jackets are mainly composed of an inner layer of fabric, an outer layer of fabric and down filling between the inner and outer layers. In this way, the fluffiness of the down, the inner and outer layers of fabric can play a role in windproofing and warmth preservation.

[0003] In order to improve the comprehensive performance of down jackets in the related art, the inner fabric and / or the outer fabric adopts a composite fabric, that is, a composite of fabric and high molecular polymer. In this way, not only the original performance of the fabric can be retained, but also the performance of the covering layer can be improved. For example, a water-based coating is applied to the surface of the fabric and heated to form a thin film, which can form a moisture-permeable and waterproof coating. Another example is to form a natural bionic functional membrane with a twisted spiral structure through electrospinning, and then the natural bionic functional membrane is bonded between the inner fabric and the outer fabric to achieve the waterproof and moisture-permeable properties of the fabric.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Although the above methods can improve some of the performance of down jackets, the processing methods such as finishing, coating, and weaving density control will affect the lightness and breathability of down jackets. In addition, if the processing methods such as changing the structure of fiber raw materials are used, the cost is high, the manufacturing is difficult, the breathability effect is poor, and the problem of down running may occur at the pinhole position.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiments provide a waterproof, breathable and thermal insulation fabric, which can effectively reduce the overall weight and improve the anti-down drilling effect while ensuring that the fabric has good air permeability, thermal insulation and waterproof properties.

[0009] In some embodiments, the waterproof, breathable and warm-keeping fabric comprises a fabric base and a breathable layer. The fabric base is a fabric structure; the breathable layer is hot pressed on the fabric base, and the breathable layer comprises a multi-layer superimposed microporous structure film layer obtained by treating polymer strips by mechanical stretching; wherein the difference between the gram weight of the waterproof, breathable and warm-keeping fabric and the gram weight of the fabric base is ≤7g / m 2 , the air permeability of the waterproof, breathable and warm fabric is ≥5mm / s, the hydrostatic pressure is ≥10kPa, and the number of drill piles is ≤6.

[0010] In some embodiments, the average pore size of the microporous structure ranges from 0.15 μm to 0.35 μm.

[0011] In some embodiments, polymer strips are processed by mechanical stretching to obtain a multi-layered thin film layer with a microporous structure, including: stretching the configured polymer strips laterally by a set distance; deoiling the stretched polymer strips to obtain a dry film at a first preset temperature; stretching the dry film at a second preset temperature; and hot pressing the stretched dry film to obtain a multi-layered thin film layer with a microporous structure.

[0012] In some embodiments, the second preset temperature is higher than the first preset temperature.

[0013] In some embodiments, the fabric base layer and the breathable layer are hot-pressed on hydraulic mechanical equipment using an adhesive to obtain a waterproof, breathable and warm fabric.

[0014] In some embodiments, the adhesive comprises a polyurethane elastomer hot melt adhesive.

[0015] In some embodiments, the temperature range of hot pressing is 70° C. to 120° C., the pressure range of hot pressing is 3 MPa to 7 MPa, and the duration range of hot pressing is 3 min to 7 min.

[0016] In some embodiments, the fabric base layer includes jacquard fabric or warp knitted fabric; wherein the weight of the fabric base layer is ≤60g / m 2 .

[0017] In some embodiments, the thickness of the fabric base layer is ≤1 μm, and the thickness of the breathable layer is ≤0.3 μm.

[0018] In some embodiments, the breathable layer has a thickness ranging from 0.2 μm to 0.3 μm.

[0019] In some embodiments, the waterproof, breathable and thermal insulation fabric is applied to clothing or home textile fields, wherein the clothing includes down jackets.

[0020] The waterproof, breathable and warm-keeping fabric provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] The fabric base layer is a fabric structure with large gaps and high air permeability. The air permeable layer includes a multi-layer superimposed film layer with a microporous structure, and is hot pressed on the fabric base layer. Since the fabric base layer has a certain thermal insulation property, the film layer with a porous microstructure has a certain air permeability. In this way, both thermal insulation and air permeability can be achieved at the same time. In addition, after the multi-layer film layers are superimposed, the holes in the air permeable layer can form a multi-layer staggered intersecting hole. In this way, the waterproofness and windproofness of the fabric can be improved while effectively reducing the down from drilling out of the fabric base layer side. Therefore, the waterproof, breathable and warm fabric provided by the embodiment of the present disclosure can ensure air permeability while ensuring warmth retention, and also improve the waterproofness of the fabric to avoid the down drilling. Therefore, the comprehensive performance of down products is significantly enhanced.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0024] Figure 1 is a schematic diagram of a waterproof, breathable and warm-keeping fabric provided by an embodiment of the present disclosure;

[0025] Figure 2 It is a schematic diagram of a method for preparing a breathable layer provided in an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 1: Fabric base layer; 2: Breathable layer. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] Unless otherwise stated, the term "plurality" means two or more.

[0031] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0032] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0033] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0034] In the relevant technologies, improving the waterproof, anti-down and breathable properties of down fabrics is the current research focus, and is the key to solving the problem of down fabrics being light, warm, breathable and non-down-draining. In the relevant technologies, the comprehensive performance of down fabrics is generally improved in two ways. This includes finishing, coating and weaving density control, and changing the structure of fiber raw materials through spinning, modification and other methods.

[0035] Among them, in the process of finishing, coating and weaving density control, for example, a water-based coating is applied to the fabric and heated to form a film, and a moisture-permeable and waterproof coating is formed on the fabric surface. Another example is to compound a layer of PTFE (Polytetrafluoroethylene) film on the fabric surface to achieve waterproof and breathable properties. Another example is to apply colloid on wool fabric to form a waterproof and breathable nano film layer to achieve an anti-down drilling effect.

[0036] This is achieved by changing the structure of the fiber raw materials through spinning methods, modification, etc. For example, a natural bionic functional membrane with a twisted spiral structure is formed by electrospinning, and then the natural bionic functional membrane is bonded between the fabric and the lining to give the fabric waterproof and breathable functions. Another example is to use high-density water-repellent fabric as the outer layer, and the down liner is sprayed with waterproof coating. Another example is to use high-phosphorus content flame-retardant polyester as raw material, spin high-strength fine denier staple fibers, spin and twist, weave, and perform waterproof and oil-repellent post-treatment to obtain outdoor protective fabrics. Another example is to obtain high-density chemical fiber down fabrics through weaving, plasma pretreatment, desizing, drying and shaping, sanding and fiber opening, washing, overflow dyeing, drying, and waterproof finishing.

[0037] The above methods can achieve waterproof and anti-down effects to a certain extent, but the lightness and air permeability will be affected in the process of post-finishing, coating and weaving density control, and thus the ideal effect cannot be achieved; the structural changes of the fiber raw materials through spinning methods, modification and other methods are relatively costly, difficult to manufacture, and have poor air permeability, and down may also appear at the pinhole position.

[0038] To this end, combined Figure 1 As shown, the embodiment of the present disclosure provides a waterproof, breathable and warm-keeping fabric, including a fabric base layer 1 and a breathable layer 2. The fabric base layer 1 is a fabric structure; the breathable layer 2 is hot pressed on the fabric base layer 1; the breathable layer 2 includes a multi-layer superimposed microporous structure film layer obtained by treating the polymer strips by mechanical stretching; wherein the difference between the gram weight of the waterproof, breathable and warm-keeping fabric and the gram weight of the fabric base layer 1 is ≤7g / m 2 , the air permeability of the waterproof, breathable and warm fabric is ≥5mm / s, the hydrostatic pressure is ≥10kPa, and the number of drill piles is ≤6.

[0039] The waterproof, breathable and warm-keeping fabric provided by the embodiment of the present disclosure is adopted. The fabric base layer 1 is a fabric structure, and the fabric structure has large gaps and high air permeability. The air permeable layer 2 includes a multi-layer superimposed film layer with a microporous structure, and is hot pressed on the fabric base layer 1. Since the fabric base layer 1 has a certain warmth retention, the film layer with a porous microstructure has a certain air permeability. In this way, warmth retention and air permeability can be achieved at the same time. In addition, after the multi-layer film layers are superimposed, the holes in the air permeable layer 2 can form a multi-layer misaligned and intersecting hole. In this way, the waterproofness and windproofness of the fabric can be improved while effectively reducing the down from the side of the fabric base layer 1. Therefore, the waterproof, breathable and warm-keeping fabric provided by the embodiment of the present disclosure can ensure air permeability while ensuring warmth retention, and also improve the waterproofness of the fabric to avoid the down from drilling in. Therefore, the comprehensive performance of down products is significantly enhanced.

[0040] In the embodiment of the present application, the fabric base 1 includes jacquard fabric or warp knitted fabric, both of which have good warmth retention and breathability and are easy to process. Here, the jacquard fabric is staggered by warp and weft yarns, has a stable structure, a flat surface, and is suitable for various cutting methods. In addition, there is no sagging when draped, and it is suitable for various printing and dyeing finishing methods. The printing and jacquard patterns are more delicate than knitted fabrics, braided fabrics, and felt fabrics. At the same time, it has good washing resistance, can be refurbished, dry-cleaned, and various finishing, and is not easy to wrinkle, soft to the touch, and comfortable to wear.

[0041] Warp knitted fabrics have good longitudinal dimensional stability, the fabric is crisp, not easy to curl, has low shedding, and has good air permeability and elasticity. They are suitable for various designs and can reduce operations such as seams, pleats, and splicing.

[0042] In the embodiment of the present application, the weight of the fabric base layer 1 is ≤60g / m 2 In this way, the weight of the base layer of the fabric can be effectively reduced, thereby achieving an overall lighter weight effect.

[0043] To further ensure the overall weight and other properties, in some embodiments, the thickness of the fabric base layer 1 is ≤1 μm, and the thickness of the breathable layer 2 is ≤0.3 μm.

[0044] In an embodiment of the present application, the thickness of the fabric base layer 1 is ≤1 μm. Optionally, the thickness of the fabric base layer 1 is 1 μm. Optionally, the thickness of the fabric base layer 1 is 0.95 μm. Optionally, the thickness of the fabric base layer 1 is 0.9 μm. Optionally, the thickness of the fabric base layer 1 is 0.85 μm. Optionally, the thickness of the fabric base layer 1 is 0.8 μm. Optionally, the thickness of the fabric base layer 1 is 0.75 μm. Optionally, the thickness of the fabric base layer 1 is 0.7 μm. Optionally, the thickness of the fabric base layer 1 is 0.65 μm. Optionally, the thickness of the fabric base layer 1 is 0.6 μm. Optionally, the thickness of the fabric base layer 1 is 0.55 μm. In some specific applications, the thickness of the fabric base layer 1 is 1 μm.

[0045] In an embodiment of the present application, the thickness of the breathable layer 2 is ≤ 0.3 μm. Optionally, the thickness of the breathable layer 2 is 0.3 μm. Optionally, the thickness of the breathable layer 2 is 0.25 μm. Optionally, the thickness of the breathable layer 2 is 0.2 μm. Optionally, the thickness of the breathable layer 2 is 0.15 μm. Optionally, the thickness of the breathable layer 2 is 0.1 μm.

[0046] In some specific embodiments, the thickness of the breathable layer 2 is in the range of 0.2 μm to 0.3 μm.

[0047] In some embodiments, the breathable layer 2 is hot pressed on the fabric base layer 1, and the breathable layer 2 includes a multi-layer superimposed film layer with a microporous structure. Here, in order to ensure that the breathable layer 2 has good air permeability and prevent the down on the fabric base layer 1 side from drilling out, the average pore size range of its microporous structure is 0.15μm to 0.35μm.

[0048] In an embodiment of the present application, the average pore size of the microporous structure ranges from 0.15 μm to 0.35 μm. Optionally, the average pore size of the microporous structure is 0.15 μm. Optionally, the average pore size of the microporous structure is 0.2 μm. Optionally, the average pore size of the microporous structure is 0.25 μm. Optionally, the average pore size of the microporous structure is 0.3 μm. Optionally, the average pore size of the microporous structure is 0.35 μm. In this way, the breathable layer 2 can have good air permeability and can also prevent down on the side of the fabric base layer 1 from drilling out.

[0049] In the embodiment of the present application, the polymer strip is made of a polytetrafluoroethylene (PTFE) single film as a raw material, wherein the polytetrafluoroethylene single film has good waterproof performance, moisture permeability, windproof performance, thermal insulation performance, chemical corrosion resistance, and the like.

[0050] Combination Figure 2 As shown, in some embodiments, the polymer strip is treated by mechanical stretching to obtain a multi-layered microporous structured film layer, including:

[0051] S101, stretching the configured polymer strip laterally by a set distance;

[0052] S102, deoiling the stretched polymer strip to obtain a dry film at a first preset temperature;

[0053] S103, stretching the dry film at a second preset temperature;

[0054] S104, performing heat pressing and shaping on the stretched dry film to obtain a multi-layered microporous structured film layer.

[0055] In an embodiment of the present application, in the process of transversely stretching the configured polymer strips by a set distance, the configured polymer strips are placed on a calender, and the polymer strips are transversely stretched by the calender for a certain distance. Here, the polymer strips can be stretched to 1 to 5 times their own transverse distance. In this way, by stretching, the polymer strips are pulled apart from the irregular clusters and rearranged to form an expanded film, which can effectively improve the mechanical properties and dimensional stability of the high polymer strips.

[0056] In an embodiment of the present application, the stretched polymer strip is deoiled at a first preset temperature to form a dry film. Specifically, the stretched polymer strip is placed in an oven and dried and deoiled at a first preset temperature to form a dry film.

[0057] In an embodiment of the present application, the dry film is stretched at a second preset temperature. Here, the second preset temperature is higher than the first preset temperature, wherein the temperature range of the first preset temperature is 300°C to 310°C. The temperature range of the second preset temperature is 350°C to 360°C. In the process of stretching the dry film at the second preset temperature, the dry film is stretched by increasing the roller temperature on the calender, so as to prevent the roller temperature from being too high, causing the polymer strip to soften excessively or even melt, while the temperature is too low, which may make the polymer difficult to stretch. Therefore, it is necessary to reasonably control the roller temperature to obtain the best stretching effect.

[0058] In some embodiments, the fabric base layer 1 and the breathable layer 2 are hot-pressed on hydraulic mechanical equipment using an adhesive to obtain a waterproof, breathable and warm fabric.

[0059] In the embodiment of the present application, the fabric base layer 1 and the breathable layer 2 are hot-pressed on a flat vulcanizer to prepare a waterproof, breathable and warm fabric, wherein the adhesive is spread between the fabric base layer 1 and the breathable layer 2, so that the fabric base layer 1 and the breathable layer 2 form an integral fabric structure.

[0060] In an embodiment of the present application, the adhesive includes polyurethane elastomer hot melt adhesive.

[0061] In the embodiments of the present application, the temperature range of hot pressing is 70° C. to 120° C., the pressure range of hot pressing is 3 MPa to 7 MPa, and the duration range of hot pressing is 3 min to 7 min.

[0062] In the embodiment of the present application, the waterproof, breathable and warm-keeping fabric can be applied to the field of clothing or home textiles, wherein the clothing includes down jackets. Here, the fabric of the down jacket is the waterproof, breathable and warm-keeping fabric in the above embodiment.

[0063] The following is combined with specific embodiments to verify the comprehensive performance of the waterproof, breathable and warm-keeping fabric.

[0064] In the embodiments of this application, the main test standards are as follows:

[0065] The hydrostatic pressure test standard is GB / T4744-2013;

[0066] The air permeability test standard is GB / T 5453-1997;

[0067] The test standard for the number of drill downs shall comply with GB / T14242-2021; among them, the number of drill downs ≤120 is a qualified product, the number of drill downs ≤70 is a first-class product, and the number of drill downs ≤40 is a superior product.

[0068] Example 1

[0069] In this embodiment, conventional down fabric is used as the fabric base 1, with specifications of 40D*40D, 400T nylon spunlace, and a gram weight of 42g / m 2 Here, D refers to the thickness of the fiber, and T refers to the interweaving density.

[0070] The test fabric 1 was prepared by the following steps:

[0071] Preparation of breathable layer: a polytetrafluoroethylene (PTFE) single film is made into strips on a calender, stretched transversely by 3 times, deoiled in an oven at 300°C to form a dry film, and then stretched multiple times at 350°C; finally, heat-set to form a multi-layered microporous structure film, wherein the average pore size of the micropores in the microporous structure of the film is 0.330 μm.

[0072] Preparation of test fabric 1: Using polyurethane elastomer hot melt adhesive as adhesive, the above-prepared breathable layer and the selected conventional down fabric were hot-pressed on a YP-1 flat vulcanizer to form test fabric 1. The specific process parameters of hot pressing were set as follows: the hot pressing temperature was 70°C, the hot pressing pressure was 5MPa, and the hot pressing time was 5min.

[0073] Here, the thickness of the fabric base layer 1 is 0.65 μm, and the thickness of the test fabric 1 is 0.8 μm.

[0074] Comparative Example 1

[0075] We selected the anti-drilling fabric in the relevant technology for comparison, the specifications are: 40D*40D, 400T nylon, weight 42g / m 2 Here, the anti-drilling fabric is subjected to conventional mirror calendering treatment to obtain comparison fabric 1.

[0076] The gram weight of the test fabric 1 was measured, and the air permeability test, hydrostatic pressure test and down drilling test were performed on the test fabric 1 and the comparison fabric 1, and the following Table 1 was obtained.

[0077] <![CDATA[Grammage (g / m 2 )]]> Air permeability (mm / s) Hydrostatic pressure(kpa) Number of drill piles Comparative Example 1 42 5 3 15 Example 1 47 17.4 11.3 3

[0078] Table 1

[0079] It can be seen from Table 1 above that compared with the comparison fabric 1 prepared in Comparative Example 1, the test fabric 1 prepared in Example 1 has an increased air permeability, an increased hydrostatic pressure, and a significantly reduced number of piles, while having a small increase in gram weight, and its comprehensive performance is significantly improved.

[0080] Example 2

[0081] In this embodiment, jacquard fabric is used as the fabric base 1, and the specifications are: 50D*50D, 400T small jacquard polyester pongee, weight 44g / m 2 .

[0082] Test fabric 2 was prepared by the following steps:

[0083] Preparation of breathable layer: a polytetrafluoroethylene single film is made into strips on a calender, stretched 3 times in the transverse direction, deoiled in an oven at 300°C to form a dry film, and then stretched multiple times at 350°C; finally, heat-set to form a multi-layered microporous structure film, wherein the average pore size of the micropores in the microporous structure of the film is 0.330 μm.

[0084] Preparation of test fabric 2: Using polyurethane elastomer hot melt adhesive as adhesive, the above-prepared breathable layer and the selected conventional down fabric were hot-pressed on a YP-1 flat vulcanizer to form test fabric 2. The specific process parameters of hot pressing were set as follows: the hot pressing temperature was 100°C, the hot pressing pressure was 3MPa, and the hot pressing time was 5min.

[0085] Here, the thickness of the fabric base layer 1 is 0.68 μm, and the thickness of the test fabric 2 is 0.9 μm.

[0086] Comparative Example 2

[0087] The jacquard fabric in the relevant technology is selected as the comparison fabric 2, the specification is: 50D*50D, 400T small jacquard pongee, weight 44g / m 2 .

[0088] The gram weight of the test fabric 2 was measured, and the air permeability test, hydrostatic pressure test and down drilling test were performed on the test fabric 2 and the comparison fabric 2, and the following Table 2 was obtained.

[0089] <![CDATA[Grammage (g / m 2 )]]> Air permeability (mm / s) Hydrostatic pressure(kpa) Number of drill piles Comparative Example 2 44 100.6 1 115 Example 2 51 18.4 10 5

[0090] Table 2

[0091] It can be seen from Table 2 above that compared with the comparison fabric 2 prepared in Comparative Example 2, the test fabric 2 prepared in Example 2 has a lower air permeability, an increased hydrostatic pressure, and a significantly reduced number of piles, while having a smaller increase in gram weight, and its comprehensive performance is significantly improved.

[0092] Example 3

[0093] In this embodiment, knitted fabric is used as the fabric base 1, and the specifications are: 45-count knitted polyester warp knitted fabric, weight 48g / m 2 .

[0094] Test fabric 3 was prepared by the following steps:

[0095] Preparation of breathable layer: a polytetrafluoroethylene single film is made into strips on a calender, stretched 3 times in the transverse direction, deoiled in an oven at 300°C to form a dry film, and then stretched multiple times at 350°C; finally, heat-set to form a multi-layered microporous structure film, wherein the average pore size of the micropores in the microporous structure of the film is 0.330 μm.

[0096] Preparation of test fabric 3: Using polyurethane elastomer hot melt adhesive as adhesive, the above-prepared breathable layer and the selected conventional down fabric were hot-pressed on a YP-1 flat vulcanizer to form test fabric 3. The specific process parameters of hot pressing were set as follows: the hot pressing temperature was 90°C, the hot pressing pressure was 7MPa, and the hot pressing time was 5min.

[0097] Here, the thickness of the fabric base layer 1 is 0.7 μm, and the thickness of the test fabric three is 1 μm.

[0098] Comparative Example 2

[0099] The knitted fabric in the relevant technology is selected as the comparison fabric three, the specification is: 45 knitted polyester warp knitted fabric, weight 48g / m 2 .

[0100] The gram weight of test fabric three was measured, and the air permeability test, hydrostatic pressure test and down drilling test were performed on test fabric three and comparison fabric three, and the following Table 2 was obtained.

[0101] <![CDATA[Grammage (g / m 2 )]]> Air permeability (mm / s) Hydrostatic pressure(kpa) Number of drill piles Comparative Example 3 48 150 0 143 Example 3 55 20 11 6

[0102] Table 3

[0103] It can be seen from Table 3 that, compared with the comparison fabric 3 prepared in Comparative Example 2, the test fabric 3 prepared in Example 3 has a lower air permeability, an increased hydrostatic pressure, and a significantly reduced number of piles, while having a smaller increase in gram weight, and its comprehensive performance is significantly improved.

[0104] In summary, it can be seen from the above embodiments that the waterproof, breathable and thermal insulation fabric provided in the embodiments of the present application achieves a perfect combination of air permeability and anti-down performance, strictly controls the number of down to be drilled between 3 and 6, and stably maintains the air permeability at around 20 mm / s.

[0105] In addition, the weight increase can be controlled within 7g / m 2On this basis, the base fabric is expanded from the common nylon down fabric to small jacquard fabric or knitted fabric. Compared with the common use of fine denier compact spinning to achieve static anti-drilling down, the waterproof, breathable and warm fabric provided by the embodiment of the present application expands the range of the original fabric and cooperates with the setting of the breathable layer to make the static water pressure reach more than 10kPa. Therefore, while ensuring breathability, it also gives the fabric waterproofness.

[0106] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A waterproof, breathable and warm fabric, characterized in that: include: The fabric base layer is the fabric structure; A breathable layer, which is heat-pressed on the fabric base layer, and the breathable layer includes a multi-layer superimposed microporous structure film layer obtained by treating the polymer strips by mechanical stretching; The difference between the weight of the waterproof, breathable and warm fabric and the weight of the base layer is ≤7g / m 2 , the air permeability of the waterproof, breathable and warm fabric is ≥5mm / s, the hydrostatic pressure is ≥10kPa, and the number of drill piles is ≤6.

2. The waterproof, breathable and warm-keeping fabric according to claim 1, characterized in that: The average pore size of the microporous structure ranges from 0.15 μm to 0.35 μm.

3. The waterproof, breathable and warm-keeping fabric according to claim 1, characterized in that: The polymer strips are treated by mechanical stretching to obtain a multi-layered microporous structured film layer, including: stretching the configured polymer strip laterally a set distance; Deoiling the stretched polymer strip to a dry film at a first preset temperature; stretching the dry film at a second preset temperature; The stretched dry film is heat-pressed to obtain a multi-layered microporous film layer.

4. The waterproof, breathable and warm-keeping fabric according to claim 3, characterized in that: The second preset temperature is higher than the first preset temperature.

5. The waterproof, breathable and warm-keeping fabric according to any one of claims 1 to 4, characterized in that: The waterproof, breathable and warm-keeping fabric is prepared by hot pressing the fabric base layer and the breathable layer on hydraulic mechanical equipment through adhesive.

6. The waterproof, breathable and warm-keeping fabric according to any one of claims 1 to 4, characterized in that: The temperature range of hot pressing is 70° C. to 120° C., the pressure range of hot pressing is 3 MPa to 7 MPa, and the time range of hot pressing is 3 min to 7 min.

7. The waterproof, breathable and warm-keeping fabric according to any one of claims 1 to 4, characterized in that: The base fabric includes jacquard fabric or warp knitted fabric; the base fabric weight is ≤60g / m 2 .

8. The waterproof, breathable and warm-keeping fabric according to any one of claims 1 to 4, characterized in that: The thickness of the fabric base layer is ≤1μm, and the thickness of the breathable layer is ≤0.3μm.

9. The waterproof, breathable and warm-keeping fabric according to claim 8, characterized in that: The thickness of the breathable layer ranges from 0.2 μm to 0.3 μm.

10. The waterproof, breathable and warm-keeping fabric according to claim 1, characterized in that: Applicable to clothing or home textile fields, wherein clothing includes down jackets.

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