Outer fabric for high heat protection fire-fighting suits, its preparation method and composite fabric

Abstract

The present invention discloses an outer fabric for high-temperature protection fire-fighting suits, its preparation method and a composite fabric. The outer fabric includes a surface fabric formed by interweaving surface warp yarns and surface weft yarns, and a lining fabric formed by interweaving inner warp yarns and inner weft yarns. The surface fabric and the lining fabric are joined together by multiple warp binding yarns and multiple weft binding yarns to form an air layer. Among them, the thermal shrinkage rate of the surface warp yarns and the surface weft yarns is higher than that of the inner warp yarns and the inner weft yarns. The inner warp yarns and the inner weft yarns are yarns made of low thermal conductivity fibers accounting for 70-85% by mass percentage, aramid fibers accounting for 13-28% and organic conductive fibers accounting for 2%. The present invention not only significantly improves the heat insulation effect, but also reduces the overall weight of the fabric and the production cost, and is very suitable for making high-temperature protection fire-fighting suits.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, and particularly to an outer fabric for a high heat protection fire fighting suit, a preparation method thereof, and a composite fabric. Background Art

[0002] During the fire fighting and rescue process, the heat transfer in the fire field mainly includes conduction, convection, and radiation. Under high temperature and high heat conditions, it will pose a threat to the lives of firefighters. Protective clothing is a safety equipment to protect the lives of firefighters. The better the heat protection performance, the higher the protection level. Therefore, a high heat protection fire fighting suit will more effectively protect the lives of firefighters. The fabric of the protective clothing not only needs to have excellent inherent flame retardant properties, but also needs to have a relatively high breaking strength, and the gram weight of the fabric cannot be too large, which can greatly reduce the physical energy consumption of firefighters during work and increase the comfort of the fabric. The development of lightweight fire fighting suits will be the trend of the market.

[0003] However, the existing fabrics for fire fighting suits usually consist of three layers: an outer fabric, a waterproof, breathable and heat-insulating layer, and a comfort layer. The heat protection value of the fabric reaches the standard requirement of more than 28 cal / cm 2 For composite fabrics with a heat protection value of more than 35 cal / cm 2 The gram weight is generally more than 600 g / m 2 It is difficult to achieve within 550 g / m 2 For fabrics with a heat protection value of more than 35 cal / cm 2 The role of the outer fabric is particularly important. Since the outer fabric is directly in contact with the flame, forming a complete carbon film and air bubbles on the fabric surface will be the key to increasing the heat protection value. Therefore, reducing the overall weight of the composite fabric while improving the heat protection value will be the focus of the research on protective clothing.

[0004] It should be noted that this section aims to provide background or context for the embodiments of the present disclosure described in the claims. The description herein is not admitted to be prior art merely because it is included in this section. Summary of the Invention

[0005] Embodiments of the present invention provide an outer fabric for a high heat protection fire fighting suit, a preparation method thereof, and a composite fabric, so as to solve the problems in the prior art such as low heat protection performance, heavy weight, and high production cost of the outer fabric of the high heat protection fire fighting suit.

[0006] In a first aspect, an embodiment of the present invention provides an outer layer fabric for a high - heat - protection fire - fighting suit, which includes a surface fabric formed by the interweaving of surface warp yarns and surface weft yarns, and a lining fabric formed by the interweaving of inner warp yarns and inner weft yarns; the surface fabric and the lining fabric are joined by multiple warp - direction joining yarns and multiple weft - direction joining yarns, so that an air layer is formed at non - joining positions between the surface fabric and the lining fabric.

[0007] Among them, the heat shrinkage rate and heat conductivity of the surface warp yarns and the surface weft yarns are higher than those of the inner warp yarns and the inner weft yarns; the surface warp yarns, the surface weft yarns, the warp - direction joining yarns, and the weft - direction joining yarns are yarns made of one or more of aramid fiber, nitrile chloroprene fiber, flame - retardant viscose fiber, basalt fiber, and organic conductive fiber, and the inner warp yarns and the inner weft yarns are yarns made of low - thermal - conductivity fibers accounting for 70 - 85% by mass percentage, aramid fiber accounting for 13 - 28% by mass percentage, and organic conductive fiber accounting for 2% by mass percentage, and the low - thermal - conductivity fibers are one or more of polyimide fiber, wool fiber, and aramid fiber.

[0008] As a preferred mode of the first aspect of the present invention, a continuous grid structure is provided on the surface fabric. The longitudinal stripes of the grid structure are formed by two surface warp yarns interwoven with the surface weft yarns, and the transverse stripes of the grid structure are formed by two surface weft yarns interwoven with the surface warp yarns.

[0009] The warp - direction joining yarns join the surface fabric and the lining fabric at the longitudinal stripes, and the weft - direction joining yarns join the surface fabric and the lining fabric at the transverse stripes.

[0010] As a preferred mode of the first aspect of the present invention, the heat shrinkage rate of the surface warp yarns and the surface weft yarns is 3 - 5%, and the heat shrinkage rate of the inner warp yarns and the inner weft yarns is 0.5 - 2%.

[0011] As a preferred mode of the first aspect of the present invention, the arrangement ratio of the surface warp yarns to the inner warp yarns is 1.2 - 1.5:1, and the arrangement ratio of the surface weft yarns to the inner weft yarns is 1.6 - 2:1.

[0012] As a preferred mode of the first aspect of the present invention, the distance between adjacent warp - direction joining yarns is 1 - 3 cm, and the distance between adjacent weft - direction joining yarns is 1 - 3 cm.

[0013] As a preferred embodiment of the first aspect of the present invention, the breaking strength of the surface warp yarns and the surface weft yarns is 25-28 cN / tex, the breaking strength of the inner warp yarns and the inner weft yarns is 23-25 cN / tex, and the breaking strength of the warp binding yarns and the weft binding yarns is 26-27 cN / tex;

[0014] The yarn counts of the surface warp yarns, the surface weft yarns, the inner warp yarns and the inner weft yarns are 40 s / 2 to 50 s / 2, and their yarn twist coefficients are 400-430.

[0015] In a second aspect, an embodiment of the present invention provides a high-temperature protection fire-fighting suit composite fabric, which includes a waterproof, breathable and heat-insulating layer, a comfort layer, and an outer fabric as described in any one of the first aspect and its preferred embodiments above;

[0016] The waterproof, breathable and heat-insulating layer is arranged between the outer fabric and the comfort layer.

[0017] As a preferred embodiment of the second aspect of the present invention, the waterproof and breathable heat-insulating layer is made of an aramid felt or a polyimide felt coated with a PTFE film, and the comfort layer is made of an aramid-viscose lining material.

[0018] In a third aspect, an embodiment of the present invention provides a high-temperature protection fire-fighting suit, which is made of the high-temperature protection fire-fighting suit composite fabric as described in any one of the second aspect and its preferred embodiments above.

[0019] In a fourth aspect, an embodiment of the present invention provides a method for preparing an outer fabric of a high-temperature protection fire-fighting suit, including:

[0020] Preparing surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns; wherein, the surface warp yarns, the surface weft yarns, the warp binding yarns and the weft binding yarns are made of one or more of aramid fibers, nitrile chloroprene fibers, flame-retardant viscose fibers, basalt fibers and organic conductive fibers, and the inner warp yarns and the inner weft yarns are made of 70-85% by mass of low thermal conductivity fibers, 13-28% of aramid fibers and 2% of organic conductive fibers, and the low thermal conductivity fibers are one or more of polyimide fibers, wool fibers and aramid fibers;

[0021] Using a double - beam loom, the surface warp yarns and the surface weft yarns are woven into a surface fabric with a continuous lattice structure, and the inner warp yarns and the inner weft yarns are woven into an inner fabric; meanwhile, when forming the longitudinal stripes of the lattice structure of the surface fabric, the surface fabric and the inner fabric are joined by a warp joining yarn, and then when forming the transverse stripes of the lattice structure of the surface fabric, the surface fabric and the inner fabric are joined by a weft joining yarn, so that an air layer is formed between the surface fabric and the inner fabric at non - joining positions, obtaining a grey fabric;

[0022] The surface of the grey fabric is subjected to a slack - type finishing with a fluorine - containing waterproof finishing agent, and then successively subjected to singeing, hairiness treatment and waterproof treatment, and finally shaped by a stenter to obtain an outer fabric, with a unit area mass of 220 - 245 g / m 2 。

[0023] An outer fabric for a high - heat - protection fire - fighting suit, its preparation method and a composite fabric provided by an embodiment of the present invention design a double - layer structure in the outer fabric. Multiple warp joining yarns and multiple weft joining yarns are used to join the surface fabric and the inner fabric, so that an air layer is formed between the surface fabric and the inner fabric at non - joining positions; because the thermal shrinkage rates of the surface fabric and the inner fabric are inconsistent, and the inner fabric is preferably made of yarns with a low heat conductivity, while forming the air layer when heated, the low heat conductivity of the material is used to improve the overall heat - protection value of the outer fabric and the composite fabric. The heat - protection value of the composite fabric can reach 35 cal / cm 2 ,and the heat - insulation effect is significantly improved.

[0024] At the same time, the surface fabric and the inner fabric in the outer fabric preferably have appropriate components and ratios. After improving the heat - insulation performance of the fabric, the overall weight of the fabric is reduced, and the production cost is lowered, which is very suitable for making high - heat - protection fire - fighting suits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of an outer fabric for a high - heat - protection fire - fighting suit provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic side - view cross - section diagram of an outer fabric for a high - heat - protection fire - fighting suit provided by an embodiment of the present invention;

[0028] Figure 3 Structural schematic diagram of a high - heat - resistant fire - fighting suit composite fabric provided by an embodiment of the present invention;

[0029] Figure 4 Flow schematic diagram of a preparation method of an outer fabric of a high - heat - resistant fire - fighting suit provided by an embodiment of the present invention.

[0030] Among them, 10, surface fabric, 11, surface warp yarn, 12, surface weft yarn, 13, warp - direction binding yarn;

[0031] 20, inner fabric, 21, inner warp yarn, 22, inner weft yarn, 23, weft - direction binding yarn;

[0032] 31, outer fabric, 32, waterproof, breathable and heat - insulating layer, 33, comfort layer. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Refer to Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an outer fabric of a high - heat - resistant fire - fighting suit. The outer fabric mainly includes: a surface fabric 10 formed by interweaving a surface warp yarn 11 and a surface weft yarn 12 with each other, and an inner fabric 20 formed by interweaving an inner warp yarn 21 and an inner weft yarn 22 with each other; the surface fabric 10 and the inner fabric 20 are joined by a plurality of warp - direction binding yarns 13 and a plurality of weft - direction binding yarns 23, so that an air layer is formed at non - joined positions between the surface fabric 10 and the inner fabric 20;

[0036] Among them, the thermal shrinkage rate and thermal conductivity of the surface warp yarn 11 and the surface weft yarn 12 are higher than those of the inner warp yarn 21 and the inner weft yarn 22; the surface warp yarn 11, the surface weft yarn 12, the warp binder yarn 13 and the weft binder yarn 23 are yarns made of one or more of aramid fiber, nitrile chloroprene fiber, flame-retardant viscose fiber, basalt fiber and organic conductive fiber, and the inner warp yarn 21 and the inner weft yarn 22 are yarns made of low-thermal-conductivity fiber with a mass percentage of 70-85%, 13-28% of aramid fiber and 2% of organic conductive fiber, and the low-thermal-conductivity fiber is one or more of polyimide fiber, wool fiber and aramid fiber.

[0037] In this embodiment, the outer layer fabric of the high-heat protection fire-fighting suit provided by the embodiment of the present invention is a double-layer structure, which mainly includes a surface fabric and a lining fabric. Among them, the surface fabric is formed by the interweaving of surface warp yarns and surface weft yarns, and the lining fabric is formed by the interweaving of inner warp yarns and inner weft yarns. The surface fabric and the lining fabric can be plain weave, twill weave or change weave.

[0038] Furthermore, the surface fabric and the lining fabric are joined by multiple warp binder yarns and multiple weft binder yarns, so that multiple air layers will be formed at the non-joining positions of the surface fabric and the lining fabric. Since the thermal shrinkage rate and thermal conductivity of the surface warp yarns and surface weft yarns are higher than those of the inner warp yarns and inner weft yarns, the inconsistent thermal shrinkage of the two will cause the outer layer fabric to shrink and form air bulges when heated. This structure can effectively block heat and improve the heat insulation performance of the outer layer fabric.

[0039] In addition, the existing outer layer fabrics usually use imported fibers. Although they can achieve a certain heat insulation effect, the imported fibers are expensive, the production cost is high, and at the same time the fabric gram weight is heavier, making it difficult to achieve light weight. In this embodiment, the outer layer fabric preferably uses a material with a lower thermal conductivity to achieve the purpose of high heat insulation performance. When using the low thermal conductivity of the material, the proportion of the used material in the total fabric gram weight is fully considered, and at the same time, the size of the generated air layer and the fact that the surface layer of the outer layer fabric will not crack due to long-term contact with the flame after using the low-thermal-conductivity material are also considered. Therefore, the materials should be reasonably matched to give play to the synergistic effect between the fibers, reduce the production cost and achieve light weight while increasing the heat insulation performance of the outer layer fabric, so that the outer layer fabric can meet the actual use requirements.

[0040] Thus, in this embodiment, the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are yarns made of one or more of aramid fibers, nitrile chloroprene fibers, flame-retardant viscose fibers, basalt fibers and organic conductive fibers. The inner warp yarns and inner weft yarns are yarns made of low thermal conductivity fibers accounting for 70-85% by mass percentage, aramid fibers accounting for 13-28% and organic conductive fibers accounting for 2%. The low thermal conductivity fibers are one or more of polyimide fibers, wool fibers and aramid fibers. Among them, the aramid fibers in the preparation of the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are preferably aramid 1313 fibers and aramid 1414 fibers, and the aramid fibers in the preparation of the inner warp yarns and inner weft yarns are preferably aramid 1313 fibers.

[0041] Therefore, through the formation of multiple air layers at the non-binding positions of the surface fabric and the inner fabric and the use of materials with the above components and ratios, the outer fabric achieves high heat insulation performance, effectively reduces the overall weight of the fabric, and reduces the production cost, making it very suitable for making high-temperature protection fire-fighting suits.

[0042] After testing, the unit area mass of the outer fabric described in this embodiment is only 220-245 g / m 2 , achieving lightweight.

[0043] Preferably, the thermal shrinkage rate of the surface warp yarn 11 and the surface weft yarn 12 is 3-5%, and the thermal shrinkage rate of the inner warp yarn 21 and the inner weft yarn 22 is 0.5-2%.

[0044] Specifically, the inconsistent thermal shrinkage rates of the surface fabric and the inner fabric will cause the outer fabric to shrink and form air bulges when heated. Therefore, in this embodiment, the thermal shrinkage rate of the surface warp yarns and the surface weft yarns is preferably 3-5%, and the thermal shrinkage rate of the inner warp yarns and the inner weft yarns is preferably 0.5-2%, so that the thermal shrinkage rate of the surface fabric is higher than that of the inner fabric, making it easier for the outer fabric to shrink and form air bulges when heated, which can effectively block heat and thus effectively improve the heat insulation performance of the outer fabric.

[0045] Preferably, a continuous grid structure is provided on the surface fabric 10. The longitudinal stripes of the grid structure are formed by two surface warp yarns 11 intertwined with the surface weft yarn 12, and the transverse stripes of the grid structure are formed by two surface weft yarns 12 intertwined with the surface warp yarn 11. The warp binding yarn 13 binds the surface fabric 10 and the inner fabric 20 at the longitudinal stripes, and the weft binding yarn 23 binds the surface fabric 10 and the inner fabric 20 at the transverse stripes.

[0046] Specifically, a continuous grid structure, also known as a two-millimeter grid, is provided on the surface fabric, which can endow the surface fabric with special functions such as tear resistance and abrasion resistance. Even if two adjacent weave points in the warp and weft directions of the surface fabric are the same, a grid will form at the place where the weave points are the same. When tearing the fabric, the grid area is not easily torn, thus having the tear resistance function.

[0047] During weaving, two surface warp yarns intertwined by surface weft yarns form the longitudinal stripes of the grid structure, while two surface weft yarns intertwined by surface warp yarns form the transverse stripes of the grid structure. In this embodiment, the size of the grid structure is preferably set to 0.5×0.5 cm, and the tear resistance effect is better.

[0048] Furthermore, when joining the surface fabric and the lining fabric with multiple warp joining yarns and multiple weft joining yarns, it is preferable to join the surface fabric and the lining fabric with the warp joining yarns at the longitudinal stripes of a certain grid structure, and at the same time, join the surface fabric and the lining fabric with the weft joining yarns at the transverse stripes of a certain grid structure. With this setting, adjacent two surface warp yarns can fully squeeze the warp joining yarns, and adjacent two surface weft yarns can fully squeeze the weft joining yarns, so that the warp joining yarns or the weft joining yarns are not exposed, and less yarns are exposed on the surface layer, which can avoid forming protrusions and causing the surface of the fabric to be uneven.

[0049] Preferably, the arrangement configuration of the surface warp yarn 11 and the inner warp yarn 21 is 1.2 - 1.5:1, and the arrangement configuration of the surface weft yarn 12 and the inner weft yarn 22 is 1.6 - 2:1.

[0050] Specifically, the heat insulation performance of the outer fabric also depends on the arrangement of the warp and weft densities of the surface fabric and the lining fabric. Therefore, in this embodiment, it is preferable to arrange the surface warp yarn and the inner warp yarn in a ratio of 1.2 - 1.5:1, and the surface weft yarn and the inner weft yarn in a ratio of 1.6 - 2:1. In this way, the arrangement density of the yarns in the weft direction of the surface fabric is greater than that in the lining fabric, making the surface fabric denser, which can effectively block heat, thereby further improving the heat insulation performance of the outer fabric.

[0051] With the above arrangement configuration, the weight of the surface fabric can account for 50% - 58% of the total weight of the entire outer fabric, while the weight of the lining fabric accounts for 42% - 50% of the total weight of the entire outer fabric.

[0052] Preferably, the distance between adjacent warp joining yarns 13 is 1 - 3 cm, and the distance between adjacent weft joining yarns 23 is 1 - 3 cm.

[0053] Specifically, when knitting the surface fabric and the lining fabric with multiple warp knitting yarns and multiple weft knitting yarns, a certain distance should be maintained between adjacent two warp knitting yarns or adjacent two weft knitting yarns to fully increase the air layer between the surface fabric and the lining fabric, so that a more obvious air bulge can be generated when heated, thereby enhancing the heat insulation performance.

[0054] By knitting respectively in the warp and weft directions, the formed air layer has a quadrilateral structure, and there is one warp knitting yarn and one weft knitting yarn in each air layer, which can prevent the surface fabric from shrinking severely and make the structure of the surface fabric more stable.

[0055] In this embodiment, the distance between adjacent warp knitting yarns is preferably set to 1 - 3 cm, and the distance between adjacent weft knitting yarns is preferably set to 1 - 3 cm, so that the side length of the formed air layer is 1 - 3 cm.

[0056] In addition, the weft knitting yarn should be used to knit the surface fabric and the lining fabric after a grid structure is formed in the weft direction of the surface fabric. At this time, there are more weft knitting points between the surface fabric and the lining fabric in the weft direction. After the weft knitting points are knitted with the surface fabric, they are then interwoven with the lining fabric. In this way, the formed weft knitting yarn can play a role of a skeleton, enabling the outer fabric to form a better air bulge when heated, and at the same time making the structure of the entire outer fabric stable with less shrinkage.

[0057] Preferably, the breaking strength of the surface warp yarn 11 and the surface weft yarn 12 is 25 - 28 cN / tex, the breaking strength of the inner warp yarn 21 and the inner weft yarn 22 is 23 - 25 cN / tex, and the breaking strength of the warp knitting yarn and the weft knitting yarn is 26 - 27 cN / tex; the yarn count of the surface warp yarn 11, the surface weft yarn 12, the inner warp yarn 21 and the inner weft yarn 22 is 40 s / 2 - 50 s / 2, and their yarn twist coefficients are 400 - 430.

[0058] Specifically, to enable the outer fabric to have better anti - fracture performance, in this embodiment, it is preferably to use surface warp and surface weft yarns with a breaking strength of 25 - 28 cN / tex to weave the surface fabric, and at the same time preferably use inner warp yarns and inner weft yarns with a breaking strength of 23 - 25 cN / tex to weave the lining fabric, and also preferably use warp knitting yarns and weft knitting yarns with a breaking strength of 26 - 27 cN / tex to knit the surface fabric and the lining fabric.

[0059] In addition, to ensure the compactness of the outer fabric so as to better block heat, in this embodiment, it is preferably to use a yarn count of 40 s / 2 - 50 sThe surface warp yarns, surface weft yarns, inner warp yarns and inner weft yarns with a linear density of 16.7 tex or less and a yarn twist factor of 400-430.

[0060] In summary, the outer layer fabric of a high heat protection fire fighting suit provided by the embodiment of the present invention designs a double-layer structure, and uses multiple warp binding yarns and multiple weft binding yarns to bind the surface fabric and the inner fabric, so that an air layer is formed at the non-binding positions of the surface fabric and the inner fabric; because the thermal shrinkage rates of the surface fabric and the inner fabric are inconsistent, and the inner fabric is preferably made of yarns with a low heat conductivity, while forming an air layer when heated, the low heat conductivity of the material is used to improve the overall heat protection value of the outer layer fabric and the combined fabric, and the heat protection value of the combined fabric can reach 35 cal / cm 2 , and the heat insulation effect is significantly improved.

[0061] At the same time, the surface fabric and the inner fabric in the outer layer fabric preferably select appropriate components and ratios. After improving the heat insulation performance of the fabric, the overall weight of the fabric is reduced, and the production cost is lowered, which is very suitable for making high heat protection fire fighting suits.

[0062] Based on the same inventive concept, as shown in Figure 3 , the embodiment of the present invention also discloses a combined fabric for a high heat protection fire fighting suit, including a waterproof, breathable and heat insulation layer 32, a comfort layer 33, and the outer layer fabric 31 as described in any one of the above embodiments; the waterproof, breathable and heat insulation layer 32 is arranged between the outer layer fabric 31 and the comfort layer 33.

[0063] In this embodiment, the combined fabric of the high heat protection fire fighting suit is a three-layer combined structure, specifically including a waterproof, breathable and heat insulation layer, a comfort layer, and the outer layer fabric as described in any one of the above embodiments.

[0064] Among them, the waterproof, breathable and heat insulation layer is arranged between the outer layer fabric and the comfort layer, and the front surface of the waterproof, breathable and heat insulation layer is compounded with the inner fabric of the outer layer fabric, while the back surface of the waterproof, breathable and heat insulation layer is compounded with the front surface of the comfort layer, so as to form a combined fabric for a high heat protection fire fighting suit.

[0065] The heat protection value of the combined fabric of the high heat protection fire fighting suit can reach 35 cal / cm 2 , reaching a relatively high protection level and meeting the fire fighting use requirements.

[0066] It should be noted that the specific structure of the outer layer fabric is as described in the foregoing embodiments and will not be elaborated herein.

[0067] Preferably, the waterproof and breathable heat insulation layer 32 is made of aramid felt or polyimide felt coated with a PTFE film, and the comfort layer 33 is made of aramid lining.

[0068] Specifically, the waterproof and breathable thermal insulation layer is preferably made of aramid felt or polyimide felt covered with a PTFE film, while the comfort layer is preferably made of aromatic viscose lining material, which not only meets the need for waterproof and breathability, but also provides relatively comfortable wearing experience and has good antibacterial function.

[0069] In addition, using the above materials also makes the waterproof and breathable thermal insulation layer and the comfort layer lighter. Among them, the mass per unit area of the waterproof and breathable thermal insulation layer is 160 - 170 g / m 2 , the mass per unit area of the comfort layer made of aromatic viscose lining material is 120 - 130 g / m 2 , and the mass per unit area of the outer fabric is 220 - 245 g / m 2 , so that the mass per unit area of the entire high - heat - protection fire - fighting suit composite fabric is within 540 g / m 2 , achieving lightweight and making it more convenient to wear.

[0070] In summary, a high - heat - protection fire - fighting suit composite fabric provided by an embodiment of the present invention includes a waterproof, breathable and thermal insulation layer, a comfort layer and an outer fabric. A double - layer structure is designed in the outer fabric, and multiple warp binding yarns and multiple weft binding yarns are used to bind the surface fabric and the lining fabric, so that an air layer is formed at the non - binding positions of the surface fabric and the lining fabric; because the thermal shrinkage rates of the surface fabric and the lining fabric are inconsistent, and the lining fabric is preferably made of yarns with low heat conductivity, while forming an air layer when heated, the low heat conductivity of the material is used to improve the overall heat - protection value of the outer fabric and the composite fabric. The heat - protection value of the composite fabric can reach 35 cal / cm 2 , and the heat insulation effect is significantly improved.

[0071] At the same time, the surface fabric and the lining fabric in the outer fabric are preferably selected with appropriate components and ratios. After improving the heat insulation performance of the fabric, the overall weight of the fabric is reduced, and the production cost is lowered, which is very suitable for making high - heat - protection fire - fighting suits.

[0072] Based on the same inventive concept, an embodiment of the present invention also provides a high - heat - protection fire - fighting suit made of the high - heat - protection fire - fighting suit composite fabric as described in any one of the above embodiments.

[0073] In this embodiment, the high - heat - protection fire - fighting suit is made of the high - heat - protection fire - fighting suit composite fabric as described in the above embodiment. Its heat insulation effect is significantly improved, lightweight is achieved, it is convenient to wear, and it will not affect the work efficiency and the physical condition of firefighters.

[0074] Based on the same inventive concept, as shown in Figure 4 , an embodiment of the present invention also provides a preparation method for the outer fabric of a high - heat - protection fire - fighting suit. The preparation method mainly includes the following steps:

[0075] Step 401: Prepare surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns. Among them, the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are made of one or more of aramid fiber, nitrile chloroprene fiber, flame-retardant viscose fiber, basalt fiber and organic conductive fiber. The inner warp yarns and inner weft yarns are made of 70 - 85% by mass of low thermal conductivity fibers, 13 - 28% of aramid fiber and 2% of organic conductive fiber. The low thermal conductivity fibers are one or more of polyimide fiber, wool fiber and aramid fiber.

[0076] Step 402: Use a double - beam loom to weave the surface warp yarns and surface weft yarns into a surface fabric with a continuous grid structure, and weave the inner warp yarns and inner weft yarns into an inner fabric. At the same time, first, when forming the longitudinal stripes of the grid structure of the surface fabric, connect the surface fabric and the inner fabric through a warp binding yarn, and then, when forming the transverse stripes of the grid structure of the surface fabric, connect the surface fabric and the inner fabric through a weft binding yarn, so that an air layer is formed at the non - connecting positions of the surface fabric and the inner fabric, and a grey cloth is obtained.

[0077] Step 403: Loosely finish the surface of the grey cloth with a fluorine - containing waterproof finishing agent, and then successively carry out singeing treatment, hairiness treatment and waterproof treatment, and finally shape it through a stenter to obtain an outer fabric with a unit area mass of 220 - 245 g / m 2 。

[0078] In step 401, prepare the surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns respectively according to requirements.

[0079] Among them, the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are made of the same materials, which are all made of one or more of aramid fiber, nitrile chloroprene fiber, flame - retardant viscose fiber, basalt fiber and organic conductive fiber. While the inner warp yarns and inner weft yarns are made of 70 - 85% by mass of low thermal conductivity fibers, 13 - 28% of aramid fiber and 2% of organic conductive fiber. The low thermal conductivity fibers are one or more of polyimide fiber, wool fiber and aramid fiber. Among them, the aramid fiber in the preparation of the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns is preferably aramid 1313 fiber and aramid 1414 fiber, and the aramid fiber in the preparation of the inner warp yarns and inner weft yarns is preferably aramid 1313 fiber.

[0080] For each yarn used to make the outer fabric layer, preferably adopting the above materials and corresponding ratios can not only achieve the purpose of high heat insulation performance, but also fully consider the proportion of the materials used in the total fabric gram weight when utilizing the low heat conductivity of the materials, giving full play to the synergistic effect between fibers, reducing production costs and achieving lightweight while increasing the heat insulation performance of the outer fabric layer, so that the outer fabric layer can meet the actual use requirements.

[0081] When making each yarn, conventional methods in this technical field can be adopted. For example, the surface warp yarn, surface weft yarn, warp binder yarn and weft binder yarn are prepared by siro spinning, and the inner warp yarn and inner weft yarn are prepared by blending.

[0082] Preferably, the heat shrinkage rate of the surface warp yarn and surface weft yarn is 3-5%, and the heat shrinkage rate of the inner warp yarn and inner weft yarn is 0.5-2%.

[0083] Preferably, the breaking strength of the surface warp yarn 11 and surface weft yarn 12 is 25-28 cN / tex, the breaking strength of the inner warp yarn 21 and inner weft yarn 22 is 23-25 cN / tex, and the breaking strength of the warp binder yarn and weft binder yarn is 26-27 cN / tex; the yarn count of the surface warp yarn 11, surface weft yarn 12, inner warp yarn 21 and inner weft yarn 22 is 40 s / 2-50 s / 2, and their yarn twist coefficients are 400-430.

[0084] In step 402, a double-beam loom is used to weave the surface warp yarn and surface weft yarn obtained in the above steps into an outer fabric layer with a continuous grid structure, and the inner warp yarn and inner weft yarn obtained in the above steps are woven into an inner fabric layer. When weaving the surface weft yarn, the inner warp yarn sinks; when weaving the inner weft yarn, the surface warp yarn is on top.

[0085] During weaving, a double back beam is adopted, and the height of the high back beam is preferably set to 990-1000 mm, the tension control is preferably set to 600-700 Mv, the height of the low back beam is preferably set to 960-965 mm, and the tension control is preferably set to 300-340 Mv.

[0086] A 0.5×0.5 cm grid structure is also provided on the outer fabric layer, which can endow the outer fabric layer with special functions such as tear resistance and abrasion resistance. Both the outer fabric layer and the inner fabric layer adopt plain weave, twill weave or variable weave.

[0087] After the basic weaves of the surface fabric and the lining fabric are determined, the surface fabric and the lining fabric need to be joined by warp joining yarns and weft joining yarns. When joining the surface fabric and the lining fabric, first, the warp joining yarns should form a grid structure in the warp direction of the surface fabric and then join, that is, when forming the longitudinal stripes of the grid structure of the surface fabric, the surface fabric and the lining fabric are joined by one warp joining yarn; then, the weft joining yarns should form a grid structure in the weft direction of the surface fabric and then join, that is, when forming the transverse stripes of the grid structure of the surface fabric, the surface fabric and the lining fabric are joined by one weft joining yarn, so that multiple air layers are formed between the surface fabric and the lining fabric at the non-joining positions, thereby obtaining the grey fabric.

[0088] Preferably, the arrangement ratio of the surface warp yarns to the lining warp yarns is 1.2 - 1.5:1, and the arrangement ratio of the surface weft yarns to the lining weft yarns is 1.6 - 2:1.

[0089] Preferably, the distance between adjacent warp joining yarns is 1 - 3 cm, and the distance between adjacent weft joining yarns is 1 - 3 cm.

[0090] In step 403, the grey fabric obtained in the above steps is subjected to a slack finish, the surface is finished with a fluorine-containing waterproof finishing agent, then singeing treatment is carried out, and then the exposed hairiness is treated and then waterproof treatment is carried out to make the grey fabric have good waterproof function. Finally, it is shaped by a stenter to obtain the outer layer fabric, and its unit area mass is 220 g / m 2 ~245 g / m 2 , and has good heat insulation performance.

[0091] In summary, a preparation method of an outer layer fabric for a high-heat protection fire-fighting suit provided by an embodiment of the present invention designs a double-layer structure in the outer layer fabric, and uses multiple warp joining yarns and multiple weft joining yarns to join the surface fabric and the lining fabric, so that air layers are formed between the surface fabric and the lining fabric at the non-joining positions; because the thermal shrinkage rates of the surface fabric and the lining fabric are inconsistent, and the lining fabric is preferably made of yarns with low heat conductivity, while forming air layers when heated, the low heat conductivity of the material is used to improve the heat protection value of the outer layer fabric, and the heat insulation effect is significantly improved.

[0092] At the same time, the surface fabric and the lining fabric in the outer layer fabric preferably have appropriate components and ratios. After improving the heat insulation performance of the fabric, the overall weight of the fabric is reduced, and the production cost is lowered, which is very suitable for making high-heat protection fire-fighting suits.

[0093] It should be noted that for the embodiments of the above method, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the present invention.

[0094] To further understand the present invention, the preparation method of the outer layer fabric of the high - heat - protection fire - fighting suit provided by the present invention will be specifically described below in conjunction with specific embodiments.

[0095] Embodiment 1

[0096] (1) Prepare the surface warp, surface weft, inner - layer warp, inner - layer weft, warp - direction binding yarn and weft - direction binding yarn respectively. Among them, the surface warp, surface weft, warp - direction binding yarn and weft - direction binding yarn are prepared into yarns by siro spinning with aramid fiber, basalt fiber and organic conductive fiber in a mass ratio of 90:8:2. The breaking strength of the surface warp and surface weft is 26 cN / tex, the yarn count is 45 s / 2, and the twist coefficient is 430; both the inner - layer warp and inner - layer weft are prepared into yarns by blending 75% of low - thermal - conductivity fiber, 23% of aramid fiber and 2% of organic conductive fiber by mass percentage. Among them, the aramid fiber is aramid 1313 fiber. The breaking strength of the inner - layer warp and inner - layer weft is 24 cN / tex, the yarn count is 45 s / 2, and the twist coefficient is 420.

[0097] (2) Use a double - warp - beam loom to weave the surface warp and surface weft into a surface fabric with a continuous grid structure, and weave the inner - layer warp and inner - layer weft into an inner - layer fabric; among them, the arrangement configuration of the surface warp and the inner - layer warp is 1.25:1, the arrangement configuration of the surface weft and the inner - layer weft is 1.67:1, and the size of the grid structure set on the surface fabric is 0.5×0.5 cm.

[0098] At the same time, first bind the surface fabric and the inner - layer fabric with a warp - direction binding yarn when forming the longitudinal stripes of the grid structure of the surface fabric, and then bind the surface fabric and the inner - layer fabric with a weft - direction binding yarn when forming the transverse stripes of the grid structure of the surface fabric, so as to form an air layer at the non - binding positions of the surface fabric and the inner - layer fabric, and obtain a grey fabric; among them, the distance between adjacent warp - direction binding yarns is 1.2 cm, and the distance between adjacent weft - direction binding yarns is 1.5 cm.

[0099] (3) Loosely finish the surface of the grey fabric with a fluorine - containing waterproof finishing agent, and then successively carry out singeing treatment, hairiness treatment and waterproof treatment, and then shape it with a shaping machine to obtain the outer - layer fabric, and its unit - area mass is 242 g / m2 。

[0100] Example 2

[0101] (1) Prepare surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binder yarns and weft binder yarns respectively. Among them, the surface warp yarns, surface weft yarns, warp binder yarns and weft binder yarns are prepared into yarns by siro spinning with aramid fiber and organic conductive fiber in a mass ratio of 98:2. The aramid fiber includes aramid 1313 fiber and aramid 1414 fiber, and their mass ratio is 92:6. The breaking strength of the surface warp yarns and surface weft yarns is 26 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 430; both the inner warp yarns and inner weft yarns are prepared into yarns by blending 70% by mass of polyimide fiber, 28% of aramid fiber and 2% of organic conductive fiber. The aramid fiber is aramid 1313 fiber. The breaking strength of the inner warp yarns and inner weft yarns is 24 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 415.

[0102] (2) Use a double - beam loom to weave the surface warp yarns and surface weft yarns into a surface fabric with a continuous grid structure, and weave the inner warp yarns and inner weft yarns into an inner fabric; among them, the arrangement configuration of the surface warp yarns and inner warp yarns is 1.22:1, the arrangement configuration of the surface weft yarns and inner weft yarns is 1.8:1, and the size of the grid structure set on the surface fabric is 0.5×0.5 cm.

[0103] Meanwhile, first knot the surface fabric and the inner fabric through a warp binder yarn when forming the longitudinal stripes of the grid structure of the surface fabric, and then knot the surface fabric and the inner fabric through a weft binder yarn when forming the transverse stripes of the grid structure of the surface fabric, so as to form an air layer at the non - knotted positions of the surface fabric and the inner fabric to obtain a grey cloth; among them, the distance between adjacent warp binder yarns is 1.2 cm, and the distance between adjacent weft binder yarns is 1.2 cm.

[0104] (3) Loosely finish the surface of the grey cloth with a fluorine - containing waterproof finishing agent, and then successively carry out singeing treatment, hairiness treatment and waterproof treatment, and finally shape it through a stenter to obtain an outer fabric, and its unit area mass is 235 g / m 2 。

[0105] Example 3

[0106] (1) Prepare the surface warp, surface weft, inner warp, inner weft, warp binder yarn and weft binder yarn respectively. Among them, the surface warp, surface weft, warp binder yarn and weft binder yarn are made into yarns by siro spinning with aramid fiber and organic conductive fiber in a mass ratio of 98:2. The aramid fiber includes aramid 1313 fiber and aramid 1414 fiber, and their mass ratio is 85:13. The breaking strength of the surface warp and surface weft is 26.4 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 425; the inner warp and inner weft are made into yarns by blending 80% by mass of polyimide fiber, 18% of aramid fiber and 2% of organic conductive fiber. The aramid fiber is aramid 1313 fiber. The breaking strength of the inner warp and inner weft is 24 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 410.

[0107] (2) Use a double - warp loom to weave the surface warp and surface weft into a surface fabric with a continuous grid structure, and weave the inner warp and inner weft into an inner fabric; among them, the arrangement configuration of the surface warp and the inner warp is 1.28:1, the arrangement configuration of the surface weft and the inner weft is 1.75:1, and the size of the grid structure set on the surface fabric is 0.5×0.5 cm.

[0108] At the same time, first knot the surface fabric and the inner fabric through a warp binder yarn when forming the longitudinal stripes of the grid structure of the surface fabric, and then knot the surface fabric and the inner fabric through a weft binder yarn when forming the transverse stripes of the grid structure of the surface fabric, so as to form an air layer at the non - knotting positions of the surface fabric and the inner fabric, and obtain a grey cloth; among them, the distance between adjacent warp binder yarns is 1.2 cm, and the distance between adjacent weft binder yarns is 2.2 cm.

[0109] (3) Loosely finish the surface of the grey cloth with a fluorine - containing waterproof finishing agent, and then successively carry out singeing treatment, hairiness treatment and waterproof treatment, and finally obtain the outer - layer fabric through shaping by a stenter, and its unit area mass is 228 g / m 2 .

[0110] Example 4

[0111] (1) Prepare surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns respectively. Among them, the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are prepared into yarns by siro spinning with aramid fibers and organic conductive fibers (one or more of aramid fibers, modacrylic fibers, flame-retardant viscose fibers and basalt fibers) in a mass ratio of 98:2. Among them, the aramid fibers include aramid 1313 fibers and aramid 1414 fibers, and their mass ratio is 75:23. The breaking strength of the surface warp yarns and surface weft yarns is 28 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 425; the inner warp yarns and inner weft yarns are prepared into yarns by blending 85% polyimide fibers, 13% aramid fibers and 2% organic conductive fibers by mass percentage. Among them, the aramid fibers are aramid 1313 fibers. The breaking strength of the inner warp yarns and inner weft yarns is 24.5 cN / tex, the yarn count is 50 s / 2, and the twist coefficient is 410.

[0112] (2) Using a double loom shaft loom, weave the surface warp yarns and surface weft yarns into a surface fabric with a continuous grid structure, and weave the inner warp yarns and inner weft yarns into an inner fabric; among them, the arrangement configuration of the surface warp yarns and the inner warp yarns is 1.47:1, and the arrangement configuration of the surface weft yarns and the inner weft yarns is 1.7:1. The size of the grid structure set on the surface fabric is 0.5×0.5 cm.

[0113] At the same time, first bind the surface fabric and the inner fabric with a warp binding yarn when forming the longitudinal stripes of the grid structure of the surface fabric, and then bind the surface fabric and the inner fabric with a weft binding yarn when forming the transverse stripes of the grid structure of the surface fabric, so that an air layer is formed at the non-binding positions of the surface fabric and the inner fabric to obtain a grey fabric; among them, the distance between adjacent warp binding yarns is 1.2 cm, and the distance between adjacent weft binding yarns is 1.8 cm.

[0114] (3) Loosely finish the surface of the grey fabric with a fluorine-containing waterproof finishing agent, and then successively carry out singeing treatment, hairiness treatment and waterproof treatment, and then shape it through a stenter to obtain an outer fabric with a unit area mass of 230 g / m 2 .

[0115] Example 5

[0116] (1) Prepare surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns respectively. Among them, the surface warp yarns, surface weft yarns, warp binding yarns and weft binding yarns are prepared into yarns by siro spinning with aramid fibers, flame-retardant viscose fibers and organic conductive fibers in a mass ratio of 88:10:2. The breaking strength of the surface warp yarns and surface weft yarns is 27.2 cN / tex, the yarn count is 50s / 2, with a twist factor of 430; both the warp yarns and weft yarns of the inner layer are spun from a blend of 45% polyimide fiber, 30% wool fiber, 23% aramid fiber, and 2% organic conductive fiber by mass percentage. Among them, the aramid fiber is aramid 1313 fiber. The breaking strength of the warp yarns and weft yarns of the inner layer is 24.5 cN / tex, and the yarn count is 50 s / 2, with a twist factor of 420.

[0117] (2) Using a double - beam loom, the surface warp yarns and surface weft yarns are woven into a surface fabric with a continuous grid structure, and the inner - layer warp yarns and inner - layer weft yarns are woven into an inner - layer fabric. Among them, the arrangement ratio of the surface warp yarns to the inner - layer warp yarns is 1.33:1, and the arrangement ratio of the surface weft yarns to the inner - layer weft yarns is 1.85:1. The size of the grid structure set on the surface fabric is 0.5×0.5 cm.

[0118] At the same time, first, when forming the longitudinal stripes of the grid structure of the surface fabric, the surface fabric and the inner - layer fabric are joined by a warp - way joining yarn, and then, when forming the transverse stripes of the grid structure of the surface fabric, the surface fabric and the inner - layer fabric are joined by a weft - way joining yarn, so that an air layer is formed between the surface fabric and the inner - layer fabric at the non - joining positions, obtaining a grey fabric. Among them, the distance between adjacent warp - way joining yarns is 1.2 cm, and the distance between adjacent weft - way joining yarns is 2.4 cm.

[0119] (3) The surface of the grey fabric is subjected to a slack - type finishing with a fluorine - containing waterproof finishing agent, and then successively subjected to singeing, hairiness treatment, and waterproof treatment, and finally shaped by a stenter to obtain an outer - layer fabric with a unit area mass of 232 g / m 2 .

[0120] To verify the performance of the outer - layer fabric of the high - heat - resistant fire - fighting suit prepared, the outer - layer fabric of the high - heat - resistant fire - fighting suit prepared in Example 2 is made into a combined fabric for the high - heat - resistant fire - fighting suit, and various physical and chemical properties and heat - protection values of this combined fabric are tested. The test results are shown in Table below.

[0121] Table 1 Test results of the combined fabric performance

[0122]

[0123]

[0124] As can be seen from the test results in Table 1, various physical and chemical properties of this combined fabric for the high - heat - resistant fire - fighting suit have reached the corresponding requirements, and the heat - protection value is relatively high.

[0125] In the above embodiments of the present invention, the descriptions of the respective embodiments each have their own emphasis. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0126] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An outer layer fabric of a high heat protection fire fighting suit, characterized in that, It includes a surface fabric formed by the interweaving of surface warp yarns and surface weft yarns and a lining fabric formed by the interweaving of inner warp yarns and inner weft yarns; the surface fabric and the lining fabric are joined by multiple warp binding yarns and multiple weft binding yarns, so that an air layer is formed at the non-binding positions of the surface fabric and the lining fabric; wherein, the heat shrinkage rate and heat conductivity of the surface warp yarns and the surface weft yarns are higher than those of the inner warp yarns and the inner weft yarns; the surface warp yarns, the surface weft yarns, the warp binding yarns and the weft binding yarns are yarns made of one or more of aramid fiber, nitrile chloroprene fiber, flame-retardant viscose fiber, basalt fiber and organic conductive fiber, and the inner warp yarns and the inner weft yarns are yarns made of 70-85% low heat conductivity fiber, 13-28% aramid fiber and 2% organic conductive fiber by mass percentage, and the low heat conductivity fiber is one or more of polyimide fiber, wool fiber and aramid fiber; the heat shrinkage rate of the surface warp yarns and the surface weft yarns is 3-5%, and the heat shrinkage rate of the inner warp yarns and the inner weft yarns is 0.5-2%; the arrangement configuration of the surface warp yarns and the inner warp yarns is 1.2-1.5:1, and the arrangement configuration of the surface weft yarns and the inner weft yarns is 1.6-2:1; the weight of the surface fabric accounts for 50%-58% of the total weight of the entire outer fabric, and the weight of the lining fabric accounts for 42%-50% of the total weight of the entire outer fabric.

2. The outer fabric according to claim 1, characterized in that, A continuous grid structure is provided on the surface fabric, the longitudinal stripes of the grid structure are formed by two surface warp yarns interwoven with the surface weft yarns, and the transverse stripes of the grid structure are formed by two surface weft yarns interwoven with the surface warp yarns; the warp binding yarns join the surface fabric and the lining fabric at the longitudinal stripes, and the weft binding yarns join the surface fabric and the lining fabric at the transverse stripes.

3. The outer fabric according to claim 1, characterized in that, The distance between adjacent warp binding yarns is 1-3 cm, and the distance between adjacent weft binding yarns is 1-3 cm.

4. The outer fabric according to claim 1, characterized in that, The breaking strength of the surface warp yarns and the surface weft yarns is 25-28 cN / tex, the breaking strength of the inner warp yarns and the inner weft yarns is 23-25 cN / tex, and the breaking strength of the warp binding yarns and the weft binding yarns is 26-27 cN / tex; The yarn counts of the surface warp yarn, the surface weft yarn, the inner warp yarn and the inner weft yarn are 40 s / 2 to 50 s / 2, and their yarn twist coefficients are 400 to 430.

5. A high-temperature protection fire-fighting suit composite fabric, characterized in that, It includes a waterproof, breathable and heat-insulating layer, a comfort layer and an outer fabric as described in any one of claims 1-4; The waterproof, breathable and heat-insulating layer is arranged between the outer fabric and the comfort layer.

6. The combined fabric according to claim 5, characterized in that, The waterproof, breathable and heat-insulating layer is made of aramid felt or polyimide felt covered with a PTFE film, and the comfort layer is made of aramid-viscose lining material.

7. A high-temperature protection fire-fighting suit, characterized in that, It is made of the high heat protection fire-fighting suit composite fabric as described in claim 5 or 6.

8. A method for preparing an outer layer fabric of a high-temperature protection fire-fighting suit, characterized in that, It includes: Prepare surface warp yarns, surface weft yarns, inner warp yarns, inner weft yarns, warp binding yarns and weft binding yarns; wherein, the surface warp yarns, the surface weft yarns, the warp binding yarns and the weft binding yarns are made of one or more of aramid fiber, nitrile chloroprene fiber, flame-retardant viscose fiber, basalt fiber and organic conductive fiber, and the inner warp yarns and the inner weft yarns are made of 70-85% by mass of low thermal conductivity fiber, 13-28% of aramid fiber and 2% of organic conductive fiber, and the low thermal conductivity fiber is one or more of polyimide, wool fiber and aramid fiber; Using a double loom shaft loom, weave the surface warp yarns and the surface weft yarns into a surface fabric with a continuous grid structure, and weave the inner warp yarns and the inner weft yarns into an inner fabric; meanwhile, first bind the surface fabric and the inner fabric with a warp binding yarn when forming the longitudinal stripes of the grid structure of the surface fabric, and then bind the surface fabric and the inner fabric with a weft binding yarn when forming the transverse stripes of the grid structure of the surface fabric, so as to form an air layer at the non-binding positions of the surface fabric and the inner fabric, and obtain a grey cloth; The surface of the greige fabric is subjected to a slack finish using a fluorine-containing waterproof finishing agent, followed by singeing, hairiness treatment, and waterproof treatment in sequence, and then shaped by a stenter to obtain the outer fabric with a mass per unit area of 220 - 245 g / m 2 ; The thermal shrinkage rate of the surface warp yarns and the surface weft yarns is 3-5%, and the thermal shrinkage rate of the inner warp yarns and the inner weft yarns is 0.5-2%; The arrangement configuration of the surface warp yarns and the inner warp yarns is 1.2-1.5:1, and the arrangement configuration of the surface weft yarns and the inner weft yarns is 1.6-2:1; The weight of the surface fabric accounts for 50%-58% of the total weight of the entire outer fabric, and the weight of the inner fabric accounts for 42%-50% of the total weight of the entire outer fabric.

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