Flame-retardant heat-insulating protective fabric
The flame-retardant and heat-insulating protective fabric has a three-layer structure. The outer and inner layers are connected by hot-melt wires, and the bottom layer is an aerogel film, forming a dense carbon layer and an air pocket structure. This solves the problems of insufficient flame retardant performance and poor breathability of existing fabrics, and achieves lightweight and comfortable protective effects.
Patent Information
- Application Number
- CN202423151167.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing flame-retardant protective fabrics have insufficient flame-retardant performance in certain situations, and their bulky design results in poor breathability, affecting wearing comfort.
The flame-retardant and heat-insulating protective fabric adopts a three-layer structure, including an outer layer, an inner layer, and a bottom layer. The outer layer and the inner layer are connected by hot-melt wires in the warp, weft, or warp-weft direction. The outer layer and the inner layer are bonded to the bottom layer by hot-pressing with hot-melt wires. The outer layer has a 1/1 plain weave, the inner layer has a 2/1 twill weave or a 1/1 plain weave, and the bottom layer is an aerogel film. The aerogel film has a low thermal conductivity and high temperature resistance, forming a dense carbon layer and air pocket structure to prevent heat transfer.
While ensuring protective performance, the fabric weight has been reduced, breathability and wearing comfort have been improved, and the heat insulation effect of the fabric has been enhanced.
Smart Images
Figure CN223777990U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of textile fabric technology, and in particular to a flame-retardant and heat-insulating protective fabric. Background Technology
[0002] Flame-retardant fabrics are mainly used to make protective clothing for special groups of people working in special environments, which can protect the workers' bodies from harm.
[0003] Existing flame-retardant protective fabrics mainly include single-layer, double-layer, and multi-layer composite fabrics. However, in certain specific situations, the flame-retardant performance of single-layer and double-layer flame-retardant protective fabrics often fails to meet the required standards. While laminated fabrics offer improved flame retardancy, their bulky design results in poor breathability, discomfort, and high cost. These fabrics also frequently suffer from stiffening, further impacting worker comfort. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a flame-retardant and heat-insulating protective fabric to improve the comfort of wearing the fabric.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A flame-retardant and heat-insulating protective fabric comprises a surface layer, an inner layer, and a bottom layer. The surface layer is a 1 / 1 plain weave, the inner layer is a 2 / 1 twill weave or a 1 / 1 plain weave, and the bottom layer is an aerogel film. The surface layer and the inner layer are connected by hot-melt wires in the warp, weft, or warp-weft direction. The surface layer, inner layer, and bottom layer are bonded by hot-pressing with hot-melt wires. The fabric has a unit area mass of 210-260 g / m². 2 .
[0007] The inner layer of blended aerogel fibers, characterized by high thermal shrinkage, combined with a multi-layer structure and aerogel membrane, ensures that when the fabric comes into contact with a flame, the outer layer first carbonizes to form a dense carbon layer, preventing heat transfer to the inner layer. The middle layer of aerogel fibers shrinks upon heating, making the outer carbon layer even denser. Furthermore, the extremely low thermal conductivity of the middle layer of aerogel fibers slows down the diffusion of heat into the body. Simultaneously, the air pockets of the outer, middle, and inner aerogel membranes expand upon heating, further blocking heat diffusion into the body. The reduced heat reaches the aerogel membrane after passing through the air pockets. The aerogel membrane has good high-temperature resistance and can maintain its heat insulation effect in high-temperature environments above 500℃, further providing flame-retardant and heat-insulating protection.
[0008] Optionally, the warp density of the fabric is 300-360 threads / 10cm, and the weft density of the fabric is 280-330 threads / 10cm.
[0009] Optionally, the outer layer includes outer warp yarns and outer weft yarns, the inner layer includes inner warp yarns and inner weft yarns, the ratio of the outer warp yarns to the inner warp yarns is 2:1, and the ratio of the outer weft yarns to the inner weft yarns is 2:1.
[0010] Optionally, the linear density of the yarn in the outer fabric is 20-40 tex, and the area mass of the outer fabric is 100-120 g / m². 2 .
[0011] Optionally, the yarn density of the inner layer fabric is 20-40 tex, and the area mass of the inner layer fabric is 50-70 g / m². 2 .
[0012] Optionally, the spacing between adjacent hot melt wires is 0.5-1.2 cm.
[0013] Optionally, the aerogel membrane has a thickness of 0.2-0.4 mm and a unit area mass of 50-80 g / m³. 2 .
[0014] The beneficial effects of this utility model are as follows:
[0015] The outer layer resists fire, while the inner layer has a lower density and a sparser structure, increasing the overall thickness of the fabric and achieving a weight reduction effect. It effectively traps air, improving the comfort and breathability of the fabric. The outer and inner layers are regularly interwoven and connected by hot-melt yarns, and then heated with an aerogel membrane in a hot press to melt the hot-melt yarns, bonding the three layers together in a regular manner to form an air-cavity fabric. The bottom aerogel membrane further prevents heat from being conducted inward, improving the fabric's heat insulation effect. This achieves the goal of reducing overall weight while ensuring protective performance, and improving the wearer's flexibility and comfort. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the fabric structure of this utility model;
[0017] Figure 2 This is a cross-sectional view of the surface and inner layers of this utility model;
[0018] Figure 3 This is a diagram of the surface and inner layers of this utility model.
[0019] The labels and names in the diagram correspond as follows: 1. Outer layer; 11. Outer layer warp yarn; 12. Outer layer weft yarn; 2. Inner layer; 21. Inner layer warp yarn; 22. Inner layer weft yarn; 3. Bottom layer; 4. Hot melt yarn; 41. Bonded weft yarn; 42. Bonded warp yarn. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-3 This utility model provides a flame-retardant and heat-insulating protective fabric.
[0022] Example 1:
[0023] A flame-retardant and heat-insulating protective fabric, referring to Figure 1-2 The fabric comprises an outer layer 1, an inner layer 2, and a bottom layer 3. The outer layer 1 and the inner layer 2 are connected by hot-melt wires 4 in the warp, weft, or warp-weft direction. The outer layer 1, the inner layer 2, and the bottom layer 3 are bonded together by hot-pressing with hot-melt wires 4 to form an airy fabric. The fabric has a unit area mass of 215 g / m². 2 .
[0024] Reference Figure 3 Rows I and II and columns I and II are the outer layer warp yarn 11 and outer layer weft yarn 12; rows ① and ② and columns ① and ② are the inner layer warp yarn 21 and inner layer weft yarn 22; row 1 and column 1 are the knotted warp yarn 42 and knotted weft yarn 41, and "■" is the floating point of the outer layer warp yarn 11; When the inner weft yarn 22 is woven in, the outer warp yarn 11 is lifted; The inner warp yarn has 21 floating points; This is the connection point.
[0025] Surface layer 1 is a 1 / 1 plain weave fabric, woven from a blend of 93% aramid 1313, 5% aramid 1414, and 2% conductive yarn. The plain weave of surface layer 1 features short floats and multiple interlacing, resulting in a tight bond between the aramid 1313, aramid 1414, and conductive fibers, with few gaps and pores. This facilitates the formation of a dense char layer, effectively preventing flame spread and enhancing flame retardant properties. Surface layer 1 includes surface warp yarns 11 and surface weft yarns 12, with a yarn density of 23.62 tex and a unit area mass of 110 g / m². 2 .
[0026] The inner layer 2 is a 1 / 1 plain weave fabric, woven from a blend of yarns comprising 42.5% acrylic fiber, 25.5% aerogel fiber, 12.5% flame-retardant viscose fiber, 5% aramid fiber, and 14.5% hot-melt yarn 4. The loosely structured inner layer 2 increases fabric thickness and reduces weight, creating air pockets to store air and further prevent heat transfer to the body. The inner layer 2 includes inner warp yarns 21 and inner weft yarns 22, with a yarn density of 23.62 tex and a unit area mass of 55 g / m². 2 The ratio of the outer layer warp yarn 11 to the inner layer warp yarn 21 is 2:1, and the ratio of the outer layer weft yarn 12 to the inner layer weft yarn 22 is 2:1.
[0027] The outer layer 1 and inner layer 2 of the fabric are woven with double warp beams. The hot-melt yarn 4 is a bonding yarn, including bonding warp yarn 42 and bonding weft yarn 41. The specification of the hot-melt yarn 4 is 200D / 96F. The inner layer warp yarn 21 and bonding warp yarn 42 are 11+1 cycles, and the inner layer weft yarn 22 and bonding weft yarn 41 are 11+1 cycles. The bonding warp yarn 42 and bonding weft yarn 41 form a 1cm*1.2cm grid. The warp density of the fabric is 346 threads / 10cm, and the weft density is 315 threads / 10cm. The outer layer 1, inner layer 2, and bottom layer 3 are hot-pressed together by a hot press to melt the hot-melt yarn 4 at high temperature, thereby bonding the outer layer 1, inner layer 2, and aerogel film together to form a comfortable and efficient aerogel flame-retardant and heat-insulating fabric. The bottom layer 3 is a SiO2 aerogel film with a thickness of 0.2mm and a unit area mass of 50g / m². 2 With a thermal conductivity of 0.02-0.03 W / m·K and a porosity greater than 90%, the aerogel membrane has good high-temperature resistance and can maintain its thermal insulation effect in high-temperature environments above 500℃.
[0028] Example 2
[0029] A flame-retardant and heat-insulating protective fabric, referring to Figure 1-2 The fabric comprises an outer layer 1, an inner layer 2, and a bottom layer 3. The outer layer 1 and the inner layer 2 are connected by hot-melt wires 4 in the warp, weft, or warp-weft direction. The outer layer 1, the inner layer 2, and the bottom layer 3 are bonded together by hot-pressing with hot-melt wires 4 to form an airy fabric. The fabric has a unit area mass of 245 g / m². 2 .
[0030] Reference Figure 3 Rows I and II and columns I and II are the outer layer warp yarn 11 and outer layer weft yarn 12; rows ① and ② and columns ① and ② are the inner layer warp yarn 21 and inner layer weft yarn 22; row 1 and column 1 are the knotted warp yarn 42 and knotted weft yarn 41, and "■" is the floating point of the outer layer warp yarn 11; When the inner weft yarn 22 is woven in, the outer warp yarn 11 is lifted; The inner warp yarn has 21 floating points; This is the connection point.
[0031] Surface layer 1 is a 1 / 1 plain weave fabric, woven from a blend of 93% aramid 1313, 5% aramid 1414, and 2% conductive yarn. The plain weave of surface layer 1 features short floats and multiple interlacing, resulting in a tight bond between the aramid 1313, aramid 1414, and conductive fibers, with few gaps and pores. This facilitates the formation of a dense char layer, effectively preventing flame spread and enhancing flame retardant properties. Surface layer 1 includes surface warp yarns 11 and surface weft yarns 12, with a yarn density of 23.62 tex and a unit area mass of 110 g / m². 2 .
[0032] The inner layer 2 is a 1 / 1 plain weave fabric, woven from a blend of yarns comprising 42.5% acrylic fiber, 25.5% aerogel fiber, 12.5% flame-retardant viscose fiber, 5% aramid fiber, and 14.5% hot-melt yarn 4. The loosely structured inner layer 2 increases fabric thickness and reduces weight, creating air pockets to store air and further prevent heat transfer to the body. The inner layer 2 includes inner warp yarns 21 and inner weft yarns 22, with a yarn density of 23.62 tex and a unit area mass of 55 g / m². 2 The ratio of the outer layer warp yarn 11 to the inner layer warp yarn 21 is 2:1, and the ratio of the outer layer weft yarn 12 to the inner layer weft yarn 22 is 2:1.
[0033] The outer layer 1 and inner layer 2 of the fabric are woven with double warp beams. The hot-melt yarn 4 is a bonding yarn, including bonding warp yarn 42 and bonding weft yarn 41. The specification of the hot-melt yarn 4 is 200D / 96F. The inner layer warp yarn 21 and bonding warp yarn 42 have a 6+1 cycle, and the spacing between adjacent bonding warp yarns 42 is 0.5cm. The warp density of the fabric is 346 threads / 10cm, and the weft density is 315 threads / 10cm. The outer layer 1, inner layer 2, and bottom layer 3 are hot-pressed together by a hot press to melt the hot-melt yarn 4 at high temperature, thereby bonding the outer layer 1, inner layer 2, and aerogel film together to form a comfortable and efficient aerogel flame-retardant and heat-insulating fabric. The bottom layer 3 is a SiO2 aerogel film with a thickness of 0.35mm and a unit area mass of 80g / m². 2 With a thermal conductivity of 0.02-0.03 W / m·K and a porosity greater than 90%, the aerogel membrane has good high-temperature resistance and can maintain its thermal insulation effect in high-temperature environments above 500℃.
[0034] Example 3
[0035] A flame-retardant and heat-insulating protective fabric, referring to Figure 1-2The fabric comprises an outer layer 1, an inner layer 2, and a bottom layer 3. The outer layer 1 and the inner layer 2 are connected by hot-melt wires 4 in the warp, weft, or warp-weft direction. The outer layer 1, the inner layer 2, and the bottom layer 3 are bonded together by hot-pressing with hot-melt wires 4 to form an airy fabric. The fabric has a unit area mass of 260g / m². 2 .
[0036] Reference Figure 3 Rows I and II and columns I and II are the outer layer warp yarn 11 and outer layer weft yarn 12; rows ① and ② and columns ① and ② are the inner layer warp yarn 21 and inner layer weft yarn 22; row 1 and column 1 are the knotted warp yarn 42 and knotted weft yarn 41, and "■" is the floating point of the outer layer warp yarn 11; When the inner weft yarn 22 is woven in, the outer warp yarn 11 is lifted; The inner warp yarn has 21 floating points; This is the connection point.
[0037] Surface layer 1 is a 1 / 1 plain weave fabric, woven from a blend of 93% aramid 1313, 5% aramid 1414, and 2% conductive yarn. The plain weave of surface layer 1 features short floats and multiple interlacing, resulting in a tight bond between the aramid 1313, aramid 1414, and conductive fibers, with few gaps and pores. This facilitates the formation of a dense char layer, effectively preventing flame spread. The compact structure and minimal gaps also contribute to the formation of a dense char layer, enhancing flame retardant properties. Surface layer 1 includes surface warp yarns 11 and surface weft yarns 12, with a yarn density of 23.62 tex. The unit area mass of surface layer 1 is 110 g / m². 2 .
[0038] The inner layer 2 is a 1 / 1 plain weave fabric, woven from a blend of yarns comprising 42.5% acrylic fiber, 25.5% aerogel fiber, 12.5% flame-retardant viscose fiber, 5% aramid fiber, and 14.5% hot-melt yarn 4. The loosely structured inner layer 2 increases fabric thickness while reducing weight, creating air pockets to store air and further prevent heat transfer to the body. The inner layer 2 includes inner warp yarns 21 and inner weft yarns 22, with a yarn density of 29.52 tex and a unit area mass of 70 g / m². 2 The ratio of the outer layer warp yarn 11 to the inner layer warp yarn 21 is 2:1, and the ratio of the outer layer weft yarn 12 to the inner layer weft yarn 22 is 2:1.
[0039] The outer layer 1 and inner layer 2 of the fabric are woven with double warp beams. The hot-melt yarn 4 is a bonding yarn, including bonding warp yarn 42 and bonding weft yarn 41. The specification of the hot-melt yarn 4 is 250D / 144F. The inner layer weft yarn 22 and bonding weft yarn 41 have a repeat of 10+1. The spacing between two adjacent bonding weft yarns 41 is 1.2cm. The warp density of the fabric is 346 threads / 10cm, and the weft density is 315 threads / 10cm. The outer layer 1, inner layer 2, and bottom layer 3 are hot-pressed together by a hot press to melt the hot-melt yarn 4 at high temperature, thereby bonding the outer layer 1, inner layer 2, and aerogel film together to form a comfortable and efficient aerogel flame-retardant and heat-insulating fabric. The bottom layer 3 is a SiO2 aerogel film with a thickness of 0.35mm and a unit area mass of 80g / m². 2 With a thermal conductivity of 0.02-0.03 W / m·K and a porosity greater than 90%, the aerogel membrane has good high-temperature resistance and can maintain its thermal insulation effect in high-temperature environments above 500℃.
[0040] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A flame resistant, thermal protective apparel fabric characterized in that, The application relates to a fabric formed by a surface layer (1), a back layer (2) and a bottom layer (3), wherein the surface layer (1) is a 1 / 1 plain weave, the back layer (2) is a 2 / 1 twill weave or a 1 / 1 plain weave, and the bottom layer (3) is an aerogel film; the surface layer (1) and the back layer (2) are connected by hot melt yarns (4) in the warp direction, the weft direction or both directions; and the surface layer (1), the back layer (2) and the bottom layer (3) are hot-pressed and bonded by hot melt yarns (4); and the unit area mass of the fabric is 210-260 g / m 2 .
2. A flame resistant, thermal protective, protective fabric according to claim 1, wherein, The warp density of the fabric is 300-360 per 10 cm, and the weft density of the fabric is 280-330 per 10 cm.
3. The flame resistant, thermal protective, protective fabric of claim 1, wherein, The surface layer (1) comprises surface layer warp yarns (11) and surface layer weft yarns (12), and the lining layer (2) comprises lining layer warp yarns (21) and lining layer weft yarns (22), the arrangement ratio of the surface layer warp yarns (11) to the lining layer warp yarns (21) is 2:1, and the arrangement ratio of the surface layer weft yarns (12) to the lining layer weft yarns (22) is 2:
1.
4. The flame resistant, thermal protective, protective fabric of claim 1, wherein, The yarn linear density of the surface layer (1) fabric is 20-40 tex, and the unit area mass of the surface layer (1) fabric is 100-120 g / m 2 .
5. The flame resistant, thermal protective, protective fabric of claim 1, wherein, The yarn density of the lining layer (2) fabric is 20-40 tex, and the unit area mass of the lining layer (2) fabric is 50-70 g / m 2 .
6. The flame resistant, thermal protective, protective fabric of claim 1, wherein, The distance between adjacent hot melting wires (4) is 0.5-1.2 cm.
7. The flame resistant, thermal protective, protective fabric of claim 1, wherein, The aerogel film has a thickness of 0.2-0.4 mm, and the mass per unit area of the aerogel film is 50-80 g / m 2 .