Thermal protective fabric for protective clothing

Abstract

This utility model belongs to the field of protective clothing fabric technology, specifically a heat-insulating fabric for protective clothing, comprising an outer flame-retardant layer, a middle heat-insulating layer, and an inner skin-friendly layer; the heat-insulating layer is an aerogel film layer, with its heat-source-facing sidewall covered with a nano-high reflective film; the heat-source-facing sidewall of the flame-retardant layer is covered with a polytetrafluoroethylene microporous membrane; the flame-retardant layer, heat-insulating layer, and skin-friendly layer are bonded together with an adhesive. This comprehensively addresses the challenges of physical protection (flame retardancy, heat insulation, liquid resistance) and wearing comfort (lightweight, breathable), thus comprehensively improving the overall performance and user experience of protective clothing.

Description

Technical Field

[0001] This utility model belongs to the field of protective clothing fabric technology, specifically a heat-insulating fabric for protective clothing. Background Technology

[0002] In industries such as fire protection, metallurgy, and chemical engineering, as well as in specific work environments, personnel are frequently threatened by heat sources such as fires, explosions, high-temperature furnaces, electric arcs, and molten metal splashes. These heat sources transfer heat through contact, radiation, or convection, which can easily cause severe injuries such as burns to the human body, necessitating the use of highly efficient heat-insulating protective clothing.

[0003] Existing protective clothing fabrics have significant shortcomings in dealing with the aforementioned high-temperature environments: First, external heat can easily penetrate the fabric and be conducted to the inside, posing a risk of burning the user; second, the thickening of traditional insulation layers (such as pure cotton wadding) to improve heat insulation performance results in bulky and heavy clothing, severely affecting the wearer's mobility; third, protective treatments to prevent the intrusion of high-temperature liquids, chemicals, and water often severely damage the breathability of the fabric, preventing internal sweat from being effectively expelled, causing users to experience stuffiness and discomfort.

[0004] Therefore, the design of protective clothing fabrics needs to comprehensively address the challenges of physical protection (flame retardancy, heat insulation, liquid resistance) and wearing comfort (lightweight and breathable) to fully improve the overall performance and user experience of protective clothing.

[0005] To address the above problems, this utility model proposes an improved heat-insulating fabric for protective clothing. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a heat-insulating fabric for protective clothing.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a heat-insulating fabric for protective clothing, including an outer flame-retardant layer, a middle heat-insulating layer and an inner skin-friendly layer; the heat-insulating layer is an aerogel film layer, and its sidewall facing the heat source is covered with a nano high-reflectivity film; the sidewall facing the heat source of the flame-retardant layer is covered with a polytetrafluoroethylene microporous membrane; the flame-retardant layer, the heat-insulating layer and the skin-friendly layer are composited by an adhesive.

[0008] Furthermore, the flame-retardant layer is an aramid fabric layer, or any one of aramid / flame-retardant viscose, wool / flame-retardant viscose, or aramid / flame-retardant viscose / wool blended fabric layer.

[0009] Furthermore, the aerogel membrane layer is a polyimide nanofiber aerogel membrane; preferably, the aerogel membrane layer is a hydrophilic polyimide nanofiber aerogel membrane, wherein hydrophilic groups (such as hydroxyl and carboxyl groups) are introduced into the polyimide through chemical grafting to improve the adsorption-desorption efficiency of water vapor.

[0010] Furthermore, the nano-high reflectivity film is a nano-metal or metal oxide high reflectivity film; preferably, the nano-metal or metal oxide high reflectivity film is a micron-scale dot matrix pattern, rather than a continuous full coverage.

[0011] Furthermore, the skin-friendly layer is a cotton fabric layer, or any one of cotton / modal, cotton / polylactic acid, or cotton / polylactic acid / modal blended fabric layers.

[0012] Furthermore, the skin-friendly layer is woven with a textured surface to reduce the contact area with the skin and to allow for air circulation.

[0013] Furthermore, the flame-retardant layer contains microcapsule phase change material inside or on its surface.

[0014] Furthermore, the aerogel membrane layer is provided with microcapsule phase change material inside or on its surface, and / or the aerogel membrane layer is doped with nano-silica particles or hollow ceramic microspheres.

[0015] Furthermore, the adhesive uses a dotted bonding method rather than a continuous full coverage.

[0016] The beneficial effects of this utility model are:

[0017] This invention features an outer layer of aramid or aramid-blended fabric providing flame-retardant protection, and wool fibers resisting high-temperature molten metal splashes. A polytetrafluoroethylene microporous membrane provides waterproof, breathable, acid and alkali resistant, and high-temperature resistant properties. An inner layer of cotton or cotton-blended fabric is skin-friendly, moisture-wicking, and breathable, while polylactic acid provides antibacterial and anti-mite benefits. A middle aerogel membrane is ultra-lightweight, heat-insulating, and flexible. A nano-high-reflectivity film reflects most of the incident infrared heat radiation, particularly effective against radiant heat sources (such as steelmaking and firefighting), and its patterned design enhances breathability. Nano-silica particles or hollow ceramic microspheres further enhance heat reflection / scattering capabilities. Microcapsule phase change materials absorb latent heat (melting) at high temperatures and release heat (solidifying) after the temperature drops, acting as a temperature buffer. The adhesive uses a dot-matrix bonding method, preserving moisture-permeable channels. This comprehensively improves both protective performance and wearing comfort. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of another embodiment of the present invention.

[0020] The attached figures are labeled as follows: 1. Flame retardant layer; 2. Heat insulation layer; 3. Skin-friendly layer; 4. Nano high reflectivity film; 5. Polytetrafluoroethylene microporous membrane; 6. Microcapsule phase change material; 7. Nano silica particles or hollow ceramic microspheres. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Practical Example 1

[0023] See Figure 1 This utility model provides a heat-insulating fabric for protective clothing, comprising an outer flame-retardant layer 1, a middle heat-insulating layer 2, and an inner skin-friendly layer 3, which are bonded together by hot-pressing with polyurethane adhesive. Wherein:

[0024] The flame retardant layer 1 is woven from aramid fibers. Microcapsule phase change materials (such as paraffin wax and fatty acid esters) 6 are attached to the gaps in the fabric of the flame retardant layer 1 through a finishing process. The sidewall facing the heat source is covered with a polytetrafluoroethylene microporous membrane 5.

[0025] The heat insulation layer 2 is composed of a hydrophilic modified polyimide nanofiber aerogel membrane, which is uniformly doped with nano-silica particles 7. Its sidewall facing the heat source is magnetron sputtered with a nano-metal high reflectivity film (such as aluminum) 4 with a micron-scale dot pattern (such as dots or grids) through laser etching mask technology.

[0026] The skin-friendly layer 3 is woven from pure cotton fibers.

[0027] Practical Example 2

[0028] See Figure 2 This utility model provides a heat-insulating fabric for protective clothing, comprising an outer flame-retardant layer 1, a middle heat-insulating layer 2, and an inner skin-friendly layer 3, which are hot-pressed together using a dot-bonding method with polyurethane adhesive. Wherein:

[0029] The flame-retardant layer 1 is woven from aramid / flame-retardant viscose / wool blended fibers, and its sidewall facing the heat source is covered with a polytetrafluoroethylene microporous membrane 5.

[0030] The heat insulation layer 2 is composed of a hydrophilic modified polyimide nanofiber aerogel membrane, which is uniformly doped with microcapsule phase change materials (such as paraffin, fatty acid esters) 6 and hollow ceramic microspheres 7. The sidewall facing the heat source has a vapor-deposited nano metal oxide high reflectivity film (such as indium tin oxide) 4, which forms a micron-scale dot pattern (such as dots, grids) through laser etching mask technology or acid etching technology.

[0031] The skin-friendly layer 3 is woven from a blend of cotton, polylactic acid, and modal fibers.

[0032] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention, and not all embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat-insulating fabric for protective clothing, comprising an outer flame-retardant layer, a middle heat-insulating layer, and an inner skin-friendly layer, characterized in that: The heat insulation layer is an aerogel film layer, and its sidewall facing the heat source is covered with a nano-high reflective film; the flame retardant layer is covered with a polytetrafluoroethylene microporous film on its sidewall facing the heat source; the flame retardant layer, the heat insulation layer and the skin-friendly layer are composited by an adhesive.

2. The protective clothing heat-insulating fabric according to claim 1, characterized in that: The flame-retardant layer is an aramid fabric layer, or any one of aramid / flame-retardant viscose, wool / flame-retardant viscose, or aramid / flame-retardant viscose / wool blended fabric layer.

3. The protective clothing heat-insulating fabric according to claim 1, characterized in that: The aerogel membrane is a polyimide nanofiber aerogel membrane.

4. The heat-insulating fabric for protective clothing according to claim 3, characterized in that: The aerogel membrane is a hydrophilic polyimide nanofiber aerogel membrane.

5. The protective clothing heat-insulating fabric according to claim 1, characterized in that: The nano high-reflectivity film is a nano metal or metal oxide high-reflectivity film.

6. The protective clothing heat-insulating fabric according to claim 5, characterized in that: The nano-metal or metal oxide high-reflectivity film is a micron-scale dot matrix pattern, rather than a continuous full coverage.

7. The protective clothing heat-insulating fabric according to claim 1, characterized in that: The skin-friendly layer is a cotton fabric layer, or any one of cotton / modal, cotton / polylactic acid, or cotton / polylactic acid / modal blended fabric layers.

8. The heat-insulating fabric for protective clothing according to claim 1, characterized in that: The skin-friendly layer is woven with a textured surface to reduce the contact area with the skin and allow for air circulation.

9. The heat-insulating fabric for protective clothing according to claim 1, characterized in that: The flame-retardant layer contains microcapsule phase change material inside or on its surface.

10. The protective clothing heat-insulating fabric according to claim 1, characterized in that: The aerogel membrane is doped with nano-silica particles or hollow ceramic microspheres.

11. A heat-insulating fabric for protective clothing according to claim 1 or 10, characterized in that: The aerogel membrane layer contains microcapsule phase change materials inside or on its surface.

12. The heat-insulating fabric for protective clothing according to claim 1, characterized in that: The adhesive is applied in a dotted bonding manner, rather than a continuous full coverage.

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