Lightweight, wear-resistant, efficient and stable waterproof and moisture-permeable composite fabric

Abstract

The application provides a light, wear-resistant, efficient and stable waterproof and moisture-permeable composite fabric, which comprises an outer wear-resistant protective layer, an intermediate core functional layer and an inner comfortable supporting layer; the intermediate core functional layer is compounded between the outer wear-resistant protective layer and the inner comfortable supporting layer through polyurethane hot melt adhesive; the outer wear-resistant protective layer is a check cloth structure woven by base fabric and warp and weft embedded yarns; the surface of the check cloth structure is subjected to water repellent finishing to form a low-surface-energy hydrophobic layer; the intermediate core functional layer is a polytetrafluoroethylene microporous membrane; and the inner comfortable supporting layer is a polyamide 66 warp-knitted fabric. The application adopts a PTFE microporous membrane as the intermediate core functional layer, the microporous structure of the PTFE microporous membrane can break through the performance limitation of traditional membranes, realize waterproof and moisture-permeable performance, and high-strength yarns are embedded into the base fabric to form the outer wear-resistant protective layer, so that the wear resistance of the fabric is improved on the basis of ensuring lightness.

Description

Technical Field

[0001] This application relates to the field of fabric technology, and in particular to a lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric. Background Technology

[0002] With the rapid rise of outdoor sports (such as skiing and hiking), consumers have increasingly stringent functional demands for outdoor clothing. Waterproofing, snow and water resistance, breathability, and lightweighting have become core essential properties. Composite fabrics, due to their ability to integrate these multifunctional characteristics, are widely used in outdoor jackets, professional raincoats, and other products, and market demand continues to rise. This invention relates to the technical fields of fine denier nylon 66 base fabric weaving, PTFE microporous membrane preparation, nylon 66 lining fabric manufacturing, multi-layer composite technology, and water-repellent finishing of fabrics, aiming to solve the existing challenges of balancing lightweighting, waterproofing, breathability, and durability in composite fabrics.

[0003] In the existing technology, relevant patents have disclosed various preparation methods for waterproof and breathable composite fabrics, but they still have significant defects and are difficult to meet the stringent usage requirements of outdoor scenarios:

[0004] The existing patent publication number, CN 117067724 A, discloses a one-way moisture-wicking protective fabric, its preparation method, and its application. This fabric, from the inside out, consists of an inner one-way moisture-wicking fabric with both hydrophilic and hydrophobic sides, a composite protective layer composed of meltblown fabric and a PTFE micro / nano porous membrane, and an outer one-way moisture-wicking fabric with both hydrophilic and hydrophobic sides. Each layer is bonded together with a hot-melt adhesive mesh. The preparation process includes multi-layer stacking, wetting, high-temperature ironing (120℃-140℃), and drying. This invention attempts to balance barrier properties and breathability by combining a one-way moisture-wicking fabric with a protective membrane. However, due to its multi-layer composite structure (including an inner layer, a composite protective layer, an outer layer, and a double-layer hot-melt adhesive mesh), the fabric has a relatively high weight, insufficient lightweight characteristics, and its moisture permeability is difficult to match the high perspiration requirements of the human body during outdoor sports, failing to meet the requirements for long-term comfortable wear in professional outdoor scenarios.

[0005] Existing patent publication number CN 107512033 A discloses a waterproof and breathable composite fabric, the structure of which includes a waterproof layer, an upper composite fabric layer, and a lower composite fabric layer, with each layer fixed by adhesive. Although this invention claims to have a certain waterproof effect and service life, the multi-layer stacked structure using adhesive not only makes the fabric heavy overall, contrary to the trend of lightweighting, but also allows the adhesive to easily penetrate and block the gaps between fibers and the pore channels, disrupting the smoothness of the moisture permeation path. This results in a mutual constraint between waterproof and moisture permeability performance, leading to poor overall performance and making it difficult to meet the stringent standards for efficient waterproof and moisture permeability in outdoor scenarios.

[0006] In summary, existing composite fabrics generally suffer from insufficient lightweighting, poor synergy between waterproof and breathable properties, and functional degradation due to structural design, failing to fully meet the comprehensive needs of outdoor sports for clothing that is "lightweight, wear-resistant, and highly efficient, stable, waterproof, and breathable".

[0007] Existing waterproof and breathable fabrics have significant shortcomings in core performance coordination and material selection, making them unsuitable for the stringent requirements of outdoor scenarios:

[0008] 1. There are inherent technical bottlenecks in the synergistic optimization of waterproof and breathable performance. Existing fabrics are generally caught in a "one gains at the expense of the other" dilemma, making it difficult to achieve an efficient balance between the two. This results in products that are either not waterproof enough to withstand harsh outdoor environments such as heavy rain and snow, or have low breathability, failing to wick away large amounts of sweat generated during physical activity, causing stuffiness and discomfort. At the same time, the fabrics generally have a high basis weight, lacking lightweight characteristics. Furthermore, for outdoor use scenarios with high-frequency friction and abrasion, existing products cannot achieve lightweighting while ensuring sufficient abrasion resistance. The lack of synergy between lightweight and abrasion resistance has become a key obstacle restricting the products from being suitable for professional outdoor use.

[0009] 2. Limitations in the performance of core membrane materials, failing to meet multi-functional needs. The choice of functional membrane material directly determines the core performance of the fabric, and existing mainstream membrane materials all have obvious shortcomings: Although non-porous membrane materials such as TPU membranes and PU membranes can achieve basic waterproofing effects by relying on their dense structure, their moisture permeation mechanism depends on molecular chain diffusion, resulting in an extremely low moisture permeation rate, which is difficult to match the rapid sweating needs of the human body during high-intensity exercise; Although nanofiber membranes have better moisture permeability due to their porous structure, they have problems such as uneven pore size distribution and poor membrane structure stability, resulting in insufficient waterproof performance. They are also susceptible to performance degradation due to external factors such as rain impact and friction, and cannot achieve long-term stable high-level waterproofing and efficient moisture permeability. Neither type of membrane material can meet the comprehensive requirements of "high waterproofing, high moisture permeability, and stable durability" in outdoor scenarios.

[0010] Therefore, the urgent technical problem to be solved is: how to provide a lightweight, wear-resistant, efficient, and stable waterproof and breathable composite fabric that achieves waterproof and breathable properties, and improves the wear resistance of the fabric while ensuring lightweight. Utility Model Content

[0011] The purpose of this application is to provide a lightweight, wear-resistant, efficient, and stable waterproof and breathable composite fabric. It uses a PTFE microporous membrane as the middle core functional layer. The microporous structure of the PTFE microporous membrane can overcome the performance limitations of traditional membrane materials and achieve waterproof and breathable properties. High-strength yarns are embedded in the base fabric to form an outer wear-resistant protective layer, which improves the wear resistance of the fabric while ensuring lightweight.

[0012] To achieve the above objectives, this application provides a lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric comprising: an outer wear-resistant protective layer, a middle core functional layer, and an inner comfort support layer; the middle core functional layer is bonded between the outer wear-resistant protective layer and the inner comfort support layer using polyurethane hot melt adhesive; the outer wear-resistant protective layer is a grid fabric structure woven from a base fabric and warp and weft embedded yarns, and the surface of the grid fabric structure is treated with a water-repellent finish to form a low surface energy hydrophobic layer; the middle core functional layer is a polytetrafluoroethylene microporous membrane; and the inner comfort support layer is a nylon warp-knitted fabric.

[0013] The lightweight, wear-resistant, highly efficient, stable, waterproof, and breathable composite fabric described above, wherein the base fabric includes base warp and base weft; the base warp and base weft are woven into a flat fabric in the warp and weft directions; the base warp and base weft are made of 40D fine denier nylon 66 yarn.

[0014] The lightweight, wear-resistant, highly efficient, stable, waterproof, and breathable composite fabric described above includes warp and weft inserted yarns; the warp and weft inserted yarns are inserted into the base fabric from the warp and weft directions, respectively; the warp and weft inserted yarns are made of 70D nylon 66 yarn.

[0015] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric as described above, wherein the warp insertion yarn is inserted between two adjacent basic warp yarns along the warp direction; and the weft insertion yarn is inserted between two adjacent basic weft yarns along the weft direction.

[0016] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric described above, wherein the polytetrafluoroethylene microporous membrane has membrane pores, and the flow diameter of the membrane pores ranges from 0.2 to 15 μm.

[0017] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric described above, wherein the membrane pores have an irregularly curved pore structure.

[0018] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric described above, wherein the outer side of the polytetrafluoroethylene microporous membrane is coated with a hydrophobic coating.

[0019] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric described above, wherein the inner side of the polytetrafluoroethylene microporous membrane is hydrophilically treated to form a one-way moisture-wicking surface.

[0020] The lightweight, wear-resistant, highly efficient, stable, waterproof, and breathable composite fabric described above, wherein the polyurethane hot melt adhesive is applied in a dotted pattern between the outer wear-resistant protective layer and the intermediate core functional layer, or between the intermediate core functional layer and the inner comfort support layer.

[0021] The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric described above, wherein the nylon 66 warp-knitted fabric is made of nylon 66 yarn interwoven in the warp and weft directions.

[0022] The beneficial effects achieved by this application are as follows:

[0023] (1) This application uses PTFE microporous membrane as the intermediate core functional layer. The microporous structure of PTFE microporous membrane can break through the performance limitations of traditional membrane materials and achieve waterproof and breathable performance. High-strength yarn is embedded in the base fabric to form an outer wear-resistant protective layer, which improves the wear resistance of the fabric while ensuring lightweight. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a schematic diagram of the structure of a lightweight, wear-resistant, efficient, stable, waterproof, and breathable composite fabric according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the lattice fabric structure according to an embodiment of this application.

[0027] Reference numerals: 1-Outer abrasion-resistant protective layer; 2-Middle core functional layer; 3-Inner comfort support layer; 4-Polyurethane hot melt adhesive; 11-Base fabric; 12-Warp and weft embedded yarns. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1 and 2As shown, this application provides a lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric, comprising: an outer wear-resistant protective layer 1, a middle core functional layer 2, and an inner comfort support layer 3; the middle core functional layer 2 is bonded between the outer wear-resistant protective layer 1 and the inner comfort support layer 3 by polyurethane hot melt adhesive 4; the outer wear-resistant protective layer 1 is a grid fabric structure woven from a base fabric 11 and warp and weft embedded yarns 12, and the surface of the grid fabric structure is treated with a water-repellent finish to form a low surface energy hydrophobic layer; the middle core functional layer 2 is a polytetrafluoroethylene microporous membrane; the inner comfort support layer 3 is nylon 66 warp-knitted fabric. Nylon 66 is polyhexamethylene adipamide. Warp-knitted fabric is a knitted fabric woven using a warp knitting machine. Nylon 66 warp-knitted fabric is a knitted fabric woven on a warp knitting machine using nylon 66 filament as raw material.

[0030] This application adopts a three-layer collaborative structure consisting of an outer wear-resistant protective layer 1, a middle core functional layer 2, and an inner comfort support layer 3. The three layers are stably composited by polyurethane hot melt adhesive. The material selection and process design of each layer complement each other to achieve the core performance of lightweight, wear-resistant, and highly waterproof and breathable properties.

[0031] As a specific embodiment of this utility model, the base fabric 11 includes base warp and base weft; the base warp and base weft are woven into a flat fabric in the warp and weft directions; the base warp and base weft are made of 40D fine denier nylon 66 yarn.

[0032] In a specific embodiment of this utility model, the warp and weft insert yarns 12 include warp insert yarns and weft insert yarns; the warp insert yarns and weft insert yarns are inserted into the base fabric 11 from the warp and weft directions, respectively; the warp insert yarns and weft insert yarns are made of 70D nylon 66 yarn. One 70D nylon 66 yarn is inserted every 2mm to 4mm in the warp direction, and one 70D nylon 66 yarn is inserted every 3mm to 5mm in the weft direction. The warp insert yarns are inserted between two adjacent base warp yarns along the warp direction; the weft insert yarns are inserted between two adjacent base weft yarns along the weft direction.

[0033] In a preferred embodiment of this utility model, the outer fabric uses 40D fine denier nylon 66 as the base material. Through precise textile design, 70D high-strength nylon 66 yarns are embedded at intervals in the warp and weft directions to form a grid fabric structure (e.g., Figure 2 (As shown). Relying on 40D fine denier yarn to ensure the lightweight characteristics of the fabric, and with the skeleton support of 70D high-strength nylon 66 yarn, the warp and weft strength and abrasion resistance of the fabric are significantly improved without increasing the weight, while the grid texture enhances the structural stability of the fabric.

[0034] As a specific embodiment of this utility model, the polytetrafluoroethylene (PTFE) microporous membrane has membrane pores with a flow diameter ranging from 0.2 to 15 μm. The pores have an irregularly tortuous porous structure. The outer side of the PTFE microporous membrane is coated with a hydrophobic coating. The inner side of the PTFE microporous membrane is hydrophilically treated to form a one-way moisture-guiding surface. The flow diameter of the membrane pores ranges from 0.2 to 15 μm, which is between water vapor molecules (0.0003-0.0004 μm) and liquid water droplets (20-100 μm), forming a selective permeability mechanism that "allows water vapor to pass through while blocking liquid water intrusion." Simultaneously, the membrane material undergoes double-sided differential modification: the outer layer is coated with a hydrophobic coating to enhance the waterproof rating, while the inner layer is hydrophilically treated by introducing polar groups such as -OH and -COOH to reduce the contact angle and achieve humid air conduction.

[0035] It should be explained that PTFE microporous membranes are prepared using a biaxial stretching process, resulting in a surface distribution of uniform micron-sized micropores (0.2-0.3 μm in diameter). These pores are precisely positioned between liquid water droplets (approximately 100 μm) and water vapor molecules (approximately 0.0004 μm), enabling the core function of allowing water vapor to pass through smoothly while efficiently blocking liquid water. The internal structure of the PTFE microporous membrane forms an irregularly curved pore structure, overcoming the limitations of traditional membrane materials with only a single function. This addresses the shortcomings of existing mainstream membrane materials (PU membranes, TPU membranes, and nanofiber membranes) in achieving a balance between waterproofing and breathability.

[0036] In a specific embodiment of this utility model, the polyurethane hot melt adhesive 4 is coated in a dotted pattern between the outer wear-resistant protective layer 1 and the intermediate core functional layer 2, or between the intermediate core functional layer 2 and the inner comfort support layer 3. The diameter of the dots ranges from 0.4 mm to 0.7 mm, and the center-to-center distance between two adjacent polyurethane hot melt adhesive 4 coated dots ranges from 1.0 mm to 1.5 mm. The polyurethane hot melt adhesive 4 is not completely coated on the surfaces of the outer wear-resistant protective layer 1, the intermediate core functional layer 2, and the inner comfort support layer 3 to avoid clogging the pores of the PTFE microporous membrane. This utility model adopts a low-damage adhesive lamination method, using environmentally friendly polyurethane hot melt adhesive 4 as the bonding medium, to achieve a tight and non-destructive composite of nylon 66 fabric and PTFE microporous membrane.

[0037] For example, after the polyurethane hot melt adhesive 4 is applied, it forms 0.55mm dots, and the center distance between two adjacent dots is 1.2mm.

[0038] As a specific embodiment of this utility model, the process flow for achieving a tight and non-destructive composite of nylon 66 fabric and PTFE microporous membrane is as follows:

[0039] Step 1, hot melt adhesive melting: Heat the environmentally friendly polyurethane hot melt adhesive 4 to a molten fluid state to ensure bonding activity;

[0040] The second step is precision adhesive application: using a laser-engraved custom roller, molten hot melt adhesive is transferred to the surface of the PTFE microporous membrane in a uniform dotted pattern, avoiding full-width adhesive application that could clog the membrane pores and ensuring smooth moisture permeation channels.

[0041] The third step is roller lamination: After precisely aligning the PTFE microporous membrane with dotted hot melt adhesive and the nylon 66 fabric, it is fed into a constant temperature roller system for low-pressure lamination to ensure tight bonding between layers without damaging the membrane pores and fabric fibers.

[0042] The fourth step is curing: The composite fabric is sent into a constant temperature and humidity curing chamber to allow the hot melt adhesive to fully cross-link and cure, greatly improving the interlayer peel strength and ensuring that delamination and curling do not occur during long-term use.

[0043] As a specific embodiment of this utility model, the nylon 66 warp-knitted fabric is made of nylon 66 yarns interwoven in the warp and weft directions.

[0044] As a specific embodiment of this utility model, the outer abrasion-resistant protective layer 1 is made of nylon 66 fabric as the outer substrate (base fabric 11). After the outer abrasion-resistant protective layer 1 and the middle core functional layer 2 are combined and treated with a water-repellent finish, a uniform low surface energy coating is formed on the fabric surface, exhibiting a significant lotus leaf effect. This allows rainwater, snow water, and other liquid water to quickly roll off the surface, achieving primary water repellency and reducing the risk of liquid water penetrating into the inner layer, providing the first line of defense. Simultaneously, nylon 66 (a type of yarn) itself possesses excellent mechanical strength. The nylon 66, combined with the lattice fabric structure woven from warp and weft embedded yarns 12, further enhances the abrasion resistance and structural stability of the outer layer.

[0045] As a specific embodiment of this utility model, the middle waterproof and breathable core layer adopts a PTFE (polytetrafluoroethylene) microporous membrane as the core functional layer. Its core technological advantage stems from the micron-nano-scale pore structure. The pore size of the PTFE (polytetrafluoroethylene) microporous membrane is precisely between that of liquid water droplets (approximately 100 μm in diameter) and humid air molecules (approximately 0.0004 μm in diameter), forming a physical sieving effect that "allows humid air to pass through while blocking liquid water from entering." At the same time, the outer side of the PTFE microporous membrane is treated with hydrophobic material to form a hydrophobic coating (the material composition of the hydrophobic coating is, for example, fluorinated acrylate, with a thickness ranging from 0.1 μm to 0.5 μm and a water contact angle >120°), further improving the waterproof level. The inner side is post-treated to form a one-way moisture-wicking surface. The one-way moisture-wicking surface can guide the humid air generated on the skin side to the outside, while blocking liquid water from the environment side from entering the fabric. In principle, this solves the problem of synergistic waterproofing and breathability.

[0046] As a specific embodiment of this utility model, the inner comfort support layer 3 is made of nylon 66 warp-knitted fabric as a close-fitting comfort layer. On the one hand, nylon 66 has high strength characteristics, which forms a synergistic support with the outer substrate (base fabric 11), significantly improving the overall structural strength and durability of the composite fabric. On the other hand, the nylon 66 warp-knitted fabric is made of warp knitting technology, which gives the fabric soft and breathable characteristics, and helps to conduct the moisture on the skin side to the middle waterproof and breathable core layer.

[0047] As a specific embodiment of this utility model, the pretreatment of the raw materials of this utility model includes:

[0048] The outer wear-resistant protective layer 1 is treated by: relying on the mechanical properties of the nylon 66 base fabric and the optimization of the textile process, warp and weft embedded yarns 12 are embedded in the nylon 66 base fabric to simultaneously enhance the wear resistance and structural strength of the outer layer.

[0049] The intermediate core functional layer 2 is treated as follows: The PTFE microporous membrane undergoes double-sided functional improvements. A hydrophobic coating is sprayed onto its outer side to further enhance its waterproof rating; the inner side employs a hydrophilic treatment process to construct a one-way moisture-guiding channel, ensuring smooth penetration of moisture from the skin and preventing reverse blocking of external liquid water. The hydrophilic treatment method includes introducing carboxyl groups through atmospheric pressure plasma treatment, resulting in a water contact angle of <30° on the inner surface.

[0050] The inner comfort support layer 3 is treated by removing oil stains, lint, and other impurities from the surface of the inner nylon 66 warp-knitted fabric through physical cleaning and impurity removal processes; targeted softening is carried out according to comfort needs to optimize the skin-friendly feel of the fabric, while relying on the high strength characteristics of nylon 66 to provide structural support for the composite fabric.

[0051] As a specific embodiment of this utility model, the process for compositing the three-layer structure of outer wear-resistant protective layer 1, middle core functional layer 2, and inner comfort support layer 3 is as follows:

[0052] A "step-by-step composite, gradient parameter control" strategy is adopted to achieve stable bonding of the three-layer structure using polyurethane hot melt adhesive. The specific steps are as follows:

[0053] The first step involves laminating the outer wear-resistant protective layer 1 with the intermediate core functional layer 2: Polyurethane hot melt adhesive is uniformly dotted onto the hydrophobic coating side of the PTFE microporous membrane using a precision roller coater. Then, the outer nylon 66 base fabric (base material 11) is quickly and precisely bonded to the adhesive-coated side of the PTFE microporous membrane (the side with the polyurethane hot melt adhesive), and fed into a hot press roller for initial lamination and curing. Process parameters: hot pressing temperature 90℃ to 100℃, lamination speed 20m / min to 25m / min, hot pressing pressure -0.2MPa to -0.1MPa, effective contact area of ​​the dotted roller 1400 square millimeters to 1600 square millimeters, ensuring initial interlayer adhesion strength and membrane pore permeability.

[0054] The second step involves laminating an inner comfort support layer 3 onto the inner side of the intermediate core functional layer 2. Polyurethane hot melt adhesive is then uniformly coated again onto the hydrophilic side of the PTFE microporous membrane, which is the composite of the outer wear-resistant protective layer 1 and the intermediate core functional layer 2. The pre-treated inner nylon 66 warp-knitted fabric is then precisely bonded to the hydrophilic side of the PTFE microporous membrane and fed into a hot press roller to complete the three-layer composite. Process parameters: hot pressing temperature 90℃ to 100℃, lamination speed 25m / min to 30m / min, hot pressing pressure +0.5MPa to +0.7MPa, effective contact area of ​​the roller 2300 square millimeters to 2400 square millimeters, strengthening interlayer bonding while preventing membrane pore blockage.

[0055] As a specific embodiment of this utility model, the curing, maturation, and post-treatment of the composite structure includes the following steps:

[0056] First, the three-layer composite fabric is placed in a constant temperature and humidity curing oven for curing treatment to ensure complete cross-linking and curing of the polyurethane hot melt adhesive, thereby improving interlayer peel strength and structural stability. Process conditions: ambient temperature ≥25℃, relative humidity ≤80%, curing time ≥24 hours, ensuring that the fabric does not delaminate or curl during long-term use.

[0057] Secondly, the composite fabric is coated with a high-performance fluorinated waterproofing agent (PFOA-free fluorinated finishing agent, conforming to EU 2019 / 1021 (POPs) and GB / T 41420-2022 requirements) by padding process on nylon 66 base fabric. After high-temperature setting treatment, a low surface energy water-repellent film is constructed on the fabric surface, forming a stable lotus leaf effect and achieving primary high-efficiency water repellency.

[0058] As a specific embodiment of this utility model, the finished product after curing, ripening, and post-treatment is inspected and its performance is calibrated:

[0059] Additional testing: Simultaneously verify the fabric's abrasion resistance, peel strength, and lightweight properties to ensure overall performance meets standards.

[0060] If the finished product meets the above standards after inspection, it is considered a qualified product; otherwise, it is considered a non-qualified product.

[0061] The beneficial effects achieved by this application are as follows:

[0062] (1) This application uses PTFE microporous membrane as the intermediate core functional layer. The microporous structure of PTFE microporous membrane can break through the performance limitations of traditional membrane materials and achieve waterproof and breathable performance. High-strength yarn is embedded in the base fabric to form an outer wear-resistant protective layer, which improves the wear resistance of the fabric while ensuring lightweight.

[0063] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0064] In the description of this application, the word "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0065] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric, characterized in that, include: The outer wear-resistant protective layer, the middle core functional layer, and the inner comfort support layer; The intermediate core functional layer is bonded between the outer wear-resistant protective layer and the inner comfort support layer by polyurethane hot melt adhesive; The outer wear-resistant protective layer is a grid fabric structure woven from the base fabric and warp and weft embedded yarns. The surface of the grid fabric structure is treated with a water-repellent finish to form a low surface energy hydrophobic layer. The intermediate core functional layer is a polytetrafluoroethylene microporous membrane. The inner comfort support layer is made of nylon 66 warp-knitted fabric.

2. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 1, characterized in that, The base fabric includes base warp and base weft; The basic warp and the basic weft are woven together in the warp and weft directions to form a flat fabric; The basic warp and basic weft yarns are made of 40D fine denier nylon 66 yarn.

3. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 2, characterized in that, The warp and weft embedded yarns include warp inserted yarns and weft inserted yarns; The warp insertion yarn and the weft insertion yarn are inserted into the base fabric from the warp and weft directions, respectively; The warp insert yarn and the weft insert yarn are made of 70D nylon 66 yarn.

4. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 3, characterized in that, The warp insertion yarn is inserted between two adjacent base warp yarns along the warp direction; The weft insertion yarn is inserted between two adjacent base weft yarns along the weft direction.

5. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 1, characterized in that, The polytetrafluoroethylene microporous membrane has membrane pores, and the flow diameter of the membrane pores ranges from 0.2 to 15 μm.

6. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 5, characterized in that, The membrane pores have an irregularly curved pore structure.

7. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 5, characterized in that, The outer side of the polytetrafluoroethylene microporous membrane is coated with a hydrophobic coating.

8. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 5, characterized in that, The inner side of the polytetrafluoroethylene microporous membrane is hydrophilically treated to form a one-way moisture-wicking surface.

9. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 1, characterized in that, The polyurethane hot melt adhesive is applied in dots between the outer wear-resistant protective layer and the middle core functional layer, or between the middle core functional layer and the inner comfort support layer.

10. The lightweight, wear-resistant, highly efficient, and stable waterproof and breathable composite fabric according to claim 1, characterized in that, The nylon 66 warp-knitted fabric is made of nylon 66 yarns interwoven in the warp and weft directions.

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