A composite fabric

Abstract

The utility model discloses a kind of composite fabric, including outer layer, middle functional layer and inner layer sequentially arranged from outside to inside;Middle functional layer is compounded with outer layer and inner layer by reversible connecting point;Reversible connecting point is made of heat-sensitive high molecular material.The utility model is made of reversible connecting point by heat-sensitive high molecular material, its phase change temperature is accurately set at 28℃±2℃, close to the critical threshold of human body surface comfortable temperature, when ambient temperature rises and exceeds this threshold, connecting point shrinks, expands interlayer gap, forms the channel of promoting air convection, accelerates sweat evaporation and heat dissipation, when ambient temperature reduces, connecting point stretches, reduces interlayer gap, forms stable still air layer, effectively prevents heat loss, this pure mechanical type response does not need external energy source drive, realizes the intelligent two-way regulation.

Description

Technical Field

[0001] This utility model relates to the field of functional textile materials technology, and in particular to a composite fabric. Background Technology

[0002] In existing technologies, temperature-regulating fabrics used in clothing mostly rely on phase change material microcapsules or functional chemical finishing agents. The former regulates temperature through phase change heat absorption or release, but suffers from problems such as hardening of the hand feel, impaired breathability, and poor washability. The latter lacks functional durability and its effectiveness diminishes sharply after multiple washes. Furthermore, whether PCM is added through coating or spinning, its temperature-regulating response is mostly holistic and passive, unable to precisely manage the different chemical conditions required by different parts of the body during dynamic activities. For example, during outdoor sports, the back and armpits need efficient sweat wicking and heat dissipation, while the chest and abdomen need continuous heat preservation. Existing single-performance fabrics cannot meet these contradictory needs simultaneously. Therefore, there is an urgent need in this field for a physical solution that is simple in structure, responds quickly, and can achieve zoned heat and humidity management. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a composite fabric.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A composite fabric includes an outer layer, a middle functional layer, and an inner layer arranged sequentially from the outside to the inside; the middle functional layer is composited with the outer layer and the inner layer through reversible connection points; the reversible connection points are made of heat-sensitive polymer material, which shrinks in a high-temperature environment and expands in a low-temperature environment, thereby dynamically adjusting the gap between the outer layer, the middle functional layer, and the inner layer; the middle functional layer includes alternating first functional areas and second functional areas, the first functional area having a honeycomb three-dimensional woven structure, and the second functional area having a flat and dense woven structure.

[0005] Preferably, the first functional area is woven with polyester yarn with an irregular cross section, and the second functional area is woven with microfiber or acrylic yarn.

[0006] Preferably, the outer layer is a fabric layer with a windproof, waterproof, and breathable membrane attached.

[0007] Preferably, the inner layer is a blended structure of moisture-wicking and quick-drying yarn and natural fibers.

[0008] Preferably, the first functional area and the second functional area are arranged in an alternating stripe or grid pattern.

[0009] Preferably, the distribution density of reversible connection points is 20 to 30 per square centimeter.

[0010] Preferably, the phase transition temperature of the thermosensitive polymer material is 28℃±2℃.

[0011] This utility model has the following beneficial effects: 1. This utility model utilizes reversible connection points made of thermosensitive polymer materials, with a phase change temperature precisely set at 28℃±2℃, close to the critical threshold of the human body's comfortable surface temperature. When the ambient temperature rises above this threshold, the connection points contract, widening the interlayer gap and forming a channel that promotes air convection, accelerating sweat evaporation and heat dissipation. When the ambient temperature decreases, the connection points expand, reducing the interlayer gap and forming a stable, static air layer, effectively preventing heat loss. This purely mechanical response requires no external energy drive, achieving intelligent bidirectional adjustment.

[0012] 2. This utility model is achieved through an alternating splicing design of intermediate functional layers. The first functional area is woven with irregularly shaped cross-section polyester yarn in a honeycomb three-dimensional structure to form an efficient moisture outlet and heat dissipation channel, which is specifically for the areas of the human body that are prone to sweating. The second functional area is woven with microfiber in a flat and dense structure to form a heat preservation and heat-locking zone, which is specifically for the core heat preservation area of ​​the human body. This structure, which integrates two different thermal and moisture performance zones on a single fabric, solves the contradiction between static heat preservation and dynamic heat dissipation.

[0013] 3. The structure of each layer of this utility model is based on mature weaving and composite technology. The outer layer is a composite windproof and breathable membrane, the inner layer is a blended fabric, and the middle layer is made by splicing and weaving or knitting and then cutting and sewing. The reversible connection points can be applied by standard dotting process, and their distribution density is controlled within the optimized range of 20 to 30 points / square centimeter. This ensures the strength of the interlayer bonding and avoids excessive impact on the fabric's flexibility. This structure avoids dependence on expensive or non-durable chemical auxiliaries, has strong overall water resistance, and a long lifespan. It is suitable for large-scale application in multiple fields such as outdoor clothing, sportswear, and special professional attire. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a partitioned composite fabric structure; Figure 2 This is a cross-sectional view of a partitioned composite fabric. Figure 3 for Figure 2 Enlarged schematic diagram of a local structure at point A; Figure 4 This is a schematic diagram of the intermediate functional layer structure.

[0015] In the diagram: 1. Outer layer; 2. Middle functional layer; 201. First functional area; 202. Second functional area; 3. Inner layer; 4. Reversible connection point. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-4 A composite fabric includes an outer layer 1, a middle functional layer 2, and an inner layer 3 arranged sequentially from the outside to the inside; the middle functional layer 2 is composited with the outer layer 1 and the inner layer 3 through reversible connection points 4; the reversible connection points 4 are made of heat-sensitive polymer material, which shrinks in a high-temperature environment and expands in a low-temperature environment, thereby dynamically adjusting the gap between the outer layer 1, the middle functional layer 2, and the inner layer 3; the middle functional layer 2 includes alternatingly spliced ​​first functional area 201 and second functional area 202, the first functional area 201 is a honeycomb three-dimensional woven structure, and the second functional area 202 is a flat and dense woven structure.

[0018] In this embodiment, the outer layer 1, the middle functional layer 2, and the inner layer 3 are arranged in sequence to form a basic layered composite structure, which is the basic framework for realizing multifunctional integration. The reversible connection point 4 is made of heat-sensitive polymer material. Through its physical properties of shrinking at high temperature and expanding at low temperature, it actively changes the interlayer gap, thereby realizing the opening and closing of the heat and moisture regulation channel. The alternating first functional area 201 and second functional area 202 in the middle functional layer 2 are used to realize zoned management. The honeycomb three-dimensional woven structure is mainly responsible for forming a fast channel for moisture conduction and heat dissipation, while the flat and dense woven structure is mainly responsible for building a heat preservation area that locks in still air. The combination of these features together realizes the core effect of adaptive dynamic temperature regulation of the fabric.

[0019] In this invention, the first functional area 201 is woven with polyester yarn with an irregular cross section, and the second functional area 202 is woven with microfiber or acrylic yarn.

[0020] In this embodiment, the first functional area 201 is woven with polyester yarn with an irregular cross section. This technical feature utilizes the grooves of the yarn itself to generate a strong capillary effect, which accelerates the adsorption and diffusion of liquid moisture. In synergy with the honeycomb structure, it greatly improves the efficiency and speed of moisture wicking and quick drying. The second functional area 202 is woven with microfiber or acrylic yarn. Microfiber can capture more still air due to its extremely fine fineness, while acrylic yarn itself has excellent warmth retention. The function of this technical feature is to maximize the air storage capacity of this area, thereby significantly enhancing the overall heat retention effect of the fabric and making the performance differences of zone management more prominent.

[0021] In this invention, the outer layer 1 is a fabric layer with a windproof, waterproof and breathable membrane attached.

[0022] In this embodiment, the fabric layer with a windproof, waterproof and breathable membrane attached to the outer layer 1 can provide a protective barrier for the entire fabric system against the external environment. The windproof function prevents heat loss caused by air convection, the waterproof function enables the fabric to cope with rain and snow, and the breathable function ensures that internal moisture can be discharged to the outside, avoiding stuffiness. This feature greatly expands the application scenarios of the fabric, making it capable of withstanding harsh and changeable outdoor environments.

[0023] In this invention, the inner layer 3 is a blended structure of moisture-wicking and quick-drying yarn and natural fiber.

[0024] In this embodiment, the inner layer 3 is defined by its material and structure, specifically as a blend of moisture-wicking and quick-drying yarn and natural fibers. This function optimizes the contact experience with the skin and manages initial moisture. The moisture-wicking and quick-drying yarn is responsible for quickly transferring sweat away from the skin surface, while the introduction of natural fibers provides a skin-friendly, soft, and hypoallergenic comfortable feel. The blend of the two achieves a perfect balance between functionality and comfort, ensuring comfort when worn close to the skin.

[0025] In this invention, the first functional area 201 and the second functional area 202 are arranged in an alternating stripe or grid pattern.

[0026] In this embodiment, precise and differentiated heat and humidity management is achieved for different parts of the human body. For example, moisture-wicking stripes can be matched with the back of the human body where sweating is easy, and heat-insulating mesh can be matched with the core area of ​​the human body. This regular staggered distribution pattern allows a single fabric to simultaneously meet the contradictory needs of heat dissipation and heat preservation in different areas of the human body. It is a concrete manifestation of the zoning management concept in physical structure.

[0027] In this invention, the distribution density of the reversible connection points 4 is 20-30 per square centimeter.

[0028] In this embodiment, the distribution density of the reversible connection points 4 is quantitatively limited, and its range is set to 20 to 30 per square centimeter. This function seeks the best balance between interlayer bonding strength and overall fabric flexibility. Too low a density will result in weak interlayer bonding and affect durability, while too high a density will make the fabric stiff and affect comfort. This optimized parameter range ensures that the function of dynamically adjusting the gap can be realized stably and effectively.

[0029] In this invention, the phase transition temperature of the thermosensitive polymer material is 28℃±2℃.

[0030] In this embodiment, the phase transition temperature of the thermosensitive polymer material is precisely set to 28℃±2℃. The function of this technical feature is to match the intelligent response of the fabric with the comfortable temperature threshold of human skin. This temperature range is exactly near the critical point where the human body feels comfortable and begins to sweat, making the dynamic temperature regulation behavior of the fabric forward-looking and precise. Thus, the temperature regulation function is automatically turned on or off at the most needed moment. This is the key feature that reflects the inventiveness and intelligence level of this utility model.

[0031] The composite fabric of this utility model is prepared by the following steps: First, the weaving and preparation of each layer of fabric are carried out. The outer layer is made of polyester filament woven in a twill weave with a weight of about 80 g / m². Then, an e-PTFE windproof, waterproof and breathable membrane is laminated on the inner side through a dry lamination process. The moisture permeability of this membrane is not less than 8000 g / m / 24h, and the hydrostatic pressure resistance is not less than 10000 mmH2O. The middle functional layer is woven using a circular knitting machine or a rapier loom. The first functional area is made of polyester yarn with irregular cross-section woven in a variable square weave to form a concave-convex shape. The first functional area has a honeycomb-like three-dimensional structure with a depth of approximately 0.5 mm and a weight of approximately 70 g / m². The second functional area is woven with microfiber yarn through a plain weave to form a smooth, dense, and flat structure with a weight of approximately 90 g / m². The two functional areas are woven alternately with stripes of 2 cm width during the weaving process to form an integrally formed intermediate functional layer fabric. The inner layer is made of a blend of 70% irregular cross-section polyester yarn and 30% combed cotton yarn, woven with a plain weave and a weight of approximately 60 g / m², giving this layer structure both moisture-wicking and quick-drying properties as well as a skin-friendly feel.

[0032] After the fabric weaving is completed, the composite process begins. First, the woven outer layer, intermediate functional layer, and inner layer are stacked and aligned sequentially. Then, a heat-sensitive bonding material is prepared. Thermoplastic polyurethane resin particles with a phase change temperature range of 28℃±2℃ are selected and dissolved in methyl ethyl ketone (MEK) to prepare an adhesive solution with a solid content of 25%. Next, using a CNC dispensing device, the adhesive solution is applied to both sides of the intermediate functional layer in a dot matrix pattern with a needle diameter of 0.5mm and a distribution density of 25 particles / square centimeter. Then, the stacked three layers are fed into a hot press laminating machine and held at 120℃ and 0.2MPa for 30 seconds to melt the thermoplastic polyurethane bonding points and firmly bond them to the other two layers. Finally, after cooling and shaping, the bonding points are formed into a stable hemispherical structure.

[0033] After the composite process is completed, a finishing process is carried out to perform conventional flexibility and stretching treatments on the composite fabric to obtain the final product.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite fabric, characterized in that, It includes an outer layer (1), an intermediate functional layer (2), and an inner layer (3) arranged sequentially from the outside to the inside; the intermediate functional layer (2) is combined with the outer layer (1) and the inner layer (3) through a reversible connection point (4); the reversible connection point (4) is made of a heat-sensitive polymer material, which shrinks in a high-temperature environment and expands in a low-temperature environment, thereby dynamically adjusting the gap between the outer layer (1), the intermediate functional layer (2), and the inner layer (3); the intermediate functional layer (2) includes a first functional area (201) and a second functional area (202) arranged alternately, the first functional area (201) is a honeycomb three-dimensional woven structure, and the second functional area (202) is a flat and dense woven structure.

2. The fabric according to claim 1, characterized in that, The first functional area (201) is woven with polyester yarn with irregular cross section, and the second functional area (202) is woven with microfiber or acrylic yarn.

3. The fabric according to claim 1, characterized in that, The outer layer (1) is a fabric layer with a windproof, waterproof and breathable membrane attached.

4. The fabric according to claim 1, characterized in that, The inner layer (3) is a blended structure of moisture-wicking and quick-drying yarn and natural fiber.

5. The fabric according to claim 1, characterized in that, The first functional area (201) and the second functional area (202) are arranged in alternating stripes or grids.

6. The fabric according to claim 1, characterized in that, The distribution density of the reversible connection point (4) is 20 to 30 per square centimeter.

7. The fabric according to claim 1, characterized in that, The phase transition temperature of the thermosensitive polymer material is 28℃±2℃.

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