Outdoor fabric

Abstract

The utility model relates to the technical field of clothing fabrics, in particular to an outdoor fabric which comprises a skin-friendly layer, an evaporation layer, a waterproof layer and a radiation cooling layer which are sequentially arranged from inside to outside. The hygroscopicity of the skin-friendly layer and the hygroscopicity of the evaporation layer are set from large to small; the diameters of fibers for preparing the skin-friendly layer and the evaporation layer are set from large to small; and the waterproof layer is a hydrophobic microporous membrane. The utility model has the beneficial effects that one-way moisture conduction of sweat is realized through the gradient of hygroscopicity, the evaporation rate is accelerated, the sweat evaporation refrigeration effect is improved, the infrared emissivity is improved and the solar energy absorption is reduced through the outermost radiation cooling layer, and ventilation and cooling are realized through the cooperation of the radiation cooling layer and a high-efficiency evaporation structure.

Description

Technical Field

[0001] This utility model relates to the field of apparel fabric technology, specifically to an outdoor fabric. Background Technology

[0002] With societal development, people are spending more time outdoors, leading to increased demands for the performance of clothing fabrics. When outdoor temperatures are high, sunlight hitting the surface of traditional clothing fabrics can cause the fabric to heat up, making it easier for the body to sweat and creating a stuffy feeling, thus affecting the wearing experience.

[0003] Patent CN113136724A discloses a radiation-cooling fabric that attaches a high-refractive-index material to filament fibers, enabling it to achieve a temperature approximately 3.6°C lower than the ambient temperature under sunlight. However, when used outdoors, the fabric evaporates too slowly due to human sweat, causing the radiation-cooling layer to become covered in sweat. Since moisture has strong absorption properties, this significantly weakens its heat dissipation function. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an outdoor fabric that can improve evaporation efficiency while ensuring radiative cooling performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: to provide an outdoor fabric, including, from the inside to the outside, a skin-friendly layer, an evaporation layer, a water-resistant layer and a radiation cooling layer;

[0006] The hygroscopicity of the skin-friendly layer and the evaporation layer is set from high to low; the fiber diameters used to prepare the skin-friendly layer and the evaporation layer are set from high to low; the water-blocking layer is a hydrophobic microporous membrane.

[0007] Furthermore, in the aforementioned outdoor fabric, the fiber diameter of the skin-friendly layer is 20-40 μm, the fiber diameter of the evaporation layer is 1-10 μm, and the fiber diameter of the skin-friendly layer is more than 30% larger than the fiber diameter of the evaporation layer.

[0008] Furthermore, in the aforementioned outdoor fabric, the hydrophobic microporous membrane material is polytetrafluoroethylene, polyvinylidene fluoride, or polyethersulfone.

[0009] Furthermore, in the aforementioned outdoor fabric, the hydrophobic microporous membrane has a thickness of 20-40 μm and a water vapor permeability ≥3000 g / m² / 24h.

[0010] Furthermore, in the aforementioned outdoor fabrics, the skin-friendly layer is made of a blend of moisture-absorbing fibers and natural fibers.

[0011] Furthermore, in the aforementioned outdoor fabrics, the moisture-absorbing fiber is a cross-section polyester or nylon, and the natural fiber is cotton or silk, with a blending ratio of moisture-absorbing fiber: natural fiber = 60:40-20.

[0012] Furthermore, in the aforementioned outdoor fabric, the evaporation layer is made of polyester with a cross-shaped or Y-shaped cross section.

[0013] Furthermore, in the aforementioned outdoor fabric, a transition layer is provided between the skin-friendly layer and the evaporation layer, and the transition layer is made of a mixture of the materials used to prepare the skin-friendly layer and the evaporation layer.

[0014] Furthermore, in the aforementioned outdoor fabric, a radiative cooling layer is provided on the outer surface of the evaporation layer. The radiative cooling layer is composed of a matrix resin and radiative particles. The radiative particles are nano-sized silicon dioxide. The matrix resin has micropores with a pore size of 3μm-10μm.

[0015] The beneficial effects of this invention are as follows: In the outdoor fabric of this invention, the gradient of hygroscopicity enables unidirectional moisture conduction of sweat and accelerates the evaporation rate, thereby improving the cooling effect of sweat evaporation. Simultaneously, the outermost radiative cooling layer enhances infrared emissivity and reduces solar energy absorption, working in conjunction with the efficient evaporation structure to achieve breathable cooling. Furthermore, when sweat is abundant, the evaporation layer easily forms a water film, which has strong absorption characteristics, significantly weakening the heat dissipation function. This invention incorporates a water-resistant layer to prevent liquid water from flowing into the radiative cooling layer and affecting its radiative cooling function when sweat is plentiful, thus ensuring the performance advantages of the radiative cooling layer. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an outdoor fabric according to a specific embodiment of the present utility model;

[0017] Labeling Explanation: 1. Skin-friendly layer; 2. Evaporation layer; 3. Water-resistant layer; 4. Radiant cooling layer. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] This utility model provides an outdoor fabric, comprising, from the inside out: a skin-friendly layer, an evaporation layer, a water-resistant layer, and a radiative cooling layer;

[0020] The hygroscopicity of the skin-friendly layer and the evaporation layer is set from high to low; the fiber diameters used to prepare the skin-friendly layer and the evaporation layer are set from high to low; the water-blocking layer is a hydrophobic microporous membrane.

[0021] The beneficial effects of this invention are as follows: In the outdoor fabric of this invention, the gradient of hygroscopicity enables unidirectional moisture conduction of sweat and accelerates the evaporation rate, thereby improving the cooling effect of sweat evaporation. Simultaneously, the outermost radiative cooling layer enhances infrared emissivity and reduces solar energy absorption, working in conjunction with the efficient evaporation structure to achieve breathable cooling. Furthermore, when sweat is abundant, the evaporation layer easily forms a water film, which has strong absorption characteristics, significantly weakening the heat dissipation function. This invention incorporates a water-resistant layer to prevent liquid water from flowing into the radiative cooling layer and affecting its radiative cooling function when sweat is plentiful, thus ensuring the performance advantages of the radiative cooling layer.

[0022] Furthermore, in the aforementioned outdoor fabric, the fiber diameter of the skin-friendly layer is 20-40 μm, the fiber diameter of the evaporation layer is 1-10 μm, and the fiber diameter of the skin-friendly layer is more than 30% larger than the fiber diameter of the evaporation layer.

[0023] Furthermore, in the aforementioned outdoor fabric, the hydrophobic microporous membrane material is polytetrafluoroethylene, polyvinylidene fluoride, or polyethersulfone.

[0024] Furthermore, in the aforementioned outdoor fabric, the hydrophobic microporous membrane has a thickness of 20-40 μm and a water vapor permeability ≥3000 g / m² / 24h.

[0025] Furthermore, in the aforementioned outdoor fabrics, the skin-friendly layer is made of a blend of moisture-absorbing fibers and natural fibers.

[0026] Furthermore, in the aforementioned outdoor fabrics, the moisture-absorbing fiber is a cross-section polyester or nylon, and the natural fiber is cotton or silk, with a blending ratio of moisture-absorbing fiber: natural fiber = 60:40-20.

[0027] Furthermore, in the aforementioned outdoor fabric, the evaporation layer is made of polyester with a cross-shaped or Y-shaped cross section.

[0028] The above-mentioned design features the following: the groove structure of the irregular cross-section fiber can increase the specific surface area by more than 40% (compared to the circular cross-section fiber), and combined with the porous layout, the evaporation area is increased by 3-5 times compared with traditional quick-drying fabrics.

[0029] Furthermore, in the aforementioned outdoor fabric, a transition layer is provided between the skin-friendly layer and the evaporation layer, and the transition layer is made of a mixture of the materials used to prepare the skin-friendly layer and the evaporation layer.

[0030] Furthermore, in the aforementioned outdoor fabric, a radiative cooling layer is provided on the outer surface of the evaporation layer. The radiative cooling layer is composed of a matrix resin and radiative particles. The radiative particles are nano-sized silicon dioxide. The matrix resin has micropores with a pore size of 3μm-10μm.

[0031] Example 1

[0032] This embodiment provides an outdoor fabric, which includes, from the inside out: a skin-friendly layer 1, an evaporation layer 2, a water-resistant layer 3, and a radiative cooling layer 4;

[0033] The hygroscopicity of the skin-friendly layer 1 and the evaporation layer 2 is set from high to low; the fiber diameters used to prepare the skin-friendly layer 1 and the evaporation layer are set from high to low.

[0034] The fiber diameter of the skin-friendly layer 1 is 30 μm, the fiber diameter of the evaporation layer is 10 μm, and the fiber diameter of the skin-friendly layer is more than 30% larger than the fiber diameter of the evaporation layer.

[0035] The skin-friendly layer 1 is made of a blend of moisture-absorbing fibers and natural fibers. The moisture-absorbing fibers are cross-section nylon, and the natural fibers are cotton, with a blending ratio of moisture-absorbing fibers:natural fibers = 60:30.

[0036] The evaporation layer 2 is made of Y-shaped cross-section polyester with a single filament fineness ≤1.0 dtex and a fiber spacing of 50-200μm, and forms a three-dimensional interconnected pore structure through hot melt bonding.

[0037] The water-blocking layer 3 is a hydrophobic microporous membrane, and the hydrophobic microporous membrane material is polytetrafluoroethylene (PTFE) (pore size 1 μm); the thickness of the hydrophobic microporous membrane is 20 μm, the water vapor transmission rate is ≥3000 g / m² / 24h, and the liquid water osmotic pressure is ≥200 kPa.

[0038] A radiative cooling layer 4 is disposed on the outer surface of the evaporation layer 2. The radiative cooling layer 4 is composed of a matrix resin and radiative particles. The radiative particles are nano-sized silica. The matrix resin has micropores with a pore size of 3μm-10μm. The matrix resin is polyurethane.

[0039] The outdoor fabric of this invention features a gradient structure that increases the rate of sweat migration and expands the evaporation area by 3 times; the water-blocking layer blocks liquid water while maintaining a breathability of ≥500 mm / s; and enhanced radiative cooling, with the coating having an infrared emissivity of ≥85% and a solar reflectivity of ≥90%, achieving sub-environmental cooling.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An outdoor fabric, characterized in that, It includes, from the inside out, the following layers: a skin-friendly layer, an evaporation layer, a water-resistant layer, and a radiative cooling layer; The hygroscopicity of the skin-friendly layer and the evaporation layer is set from high to low; the fiber diameters used to prepare the skin-friendly layer and the evaporation layer are set from high to low; the water-blocking layer is a hydrophobic microporous membrane.

2. The outdoor fabric according to claim 1, characterized in that, The fiber diameter of the skin-friendly layer is 20-40 μm, and the fiber diameter of the evaporation layer is 1-10 μm, with the fiber diameter of the skin-friendly layer being more than 30% larger than that of the evaporation layer.

3. The outdoor fabric according to claim 1, characterized in that, The hydrophobic microporous membrane material is polytetrafluoroethylene, polyvinylidene fluoride, or polyethersulfone.

4. The outdoor fabric according to claim 3, characterized in that, The hydrophobic microporous membrane has a thickness of 20-40 μm and a water vapor permeability of ≥3000 g / m² / 24h.

5. The outdoor fabric according to claim 1, characterized in that, The evaporation layer is made of polyester with a cross-shaped or Y-shaped cross section.

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