High-temperature-resistant fabric and preparation method thereof

Abstract

The invention belongs to the technical field of special textiles, and particularly discloses a high-temperature-resistant fabric and a preparation method thereof. Polyimide fibers, meta-aramid fibers, para-aramid fibers and conductive fibers are pretreated and blended to obtain surface layer warp and weft yarns; polyimide filaments or para-aramid filaments are used as warp and weft yarns of the inner layer; weaving the surface layer warp and weft yarns and the inner layer warp and weft yarns into a double-layer fabric comprising a surface layer fabric and an inner layer fabric to obtain the high-temperature-resistant fabric; the surface-layer fabric and the inner-layer fabric are interwoven through warp yarns and weft yarns to form binding points, the positions of non-binding points form a layered structure, and a plurality of binding points form a rhombus or hexagonal structure. The prepared high-temperature-resistant fabric solves the problems that a protective fabric is prone to shrinkage and embrittlement at the high temperature, and the high-temperature-resistant performance is insufficient, and the high-temperature-resistant fabric has the excellent high-temperature-resistant performance, flame-retardant performance, mechanical performance and antibacterial performance and is higher in wearing comfort.

Description

Technical Field

[0001] The invention relates to the technical field of special textiles, and in particular to a high temperature resistant fabric and a preparation method thereof. Background Art

[0002] The outer layer of protective clothing such as firefighters' fire-fighting protective clothing and industrial flame-retardant clothing is mostly made of aramid fabrics, which have good mechanical properties and flame retardant properties. However, aramid fabrics are prone to shrinkage, burning and brittle cracking at high temperatures, and cannot guarantee the personal safety of firefighters under extreme conditions. At present, there is little research and development on high-temperature resistant fabrics for protective clothing, and the comprehensive performance is poor, which cannot meet the requirements of washing, strength, softness and other wearing performance. For example, fabrics made of carbon fiber pre-oxidized yarn have problems such as insufficient strength and poor high-temperature resistance; for example, fabrics made of inorganic basalt fibers feel hard and itchy, and have poor comfort, which is not suitable for use as the outer fabric of protective clothing; some flame-retardant polyester, flame-retardant viscose and their blended fabrics have poor thermal stability at high temperatures and can only be used for the inner fabric of protective clothing, which cannot meet the performance requirements of the outer fabric of protective clothing.

[0003] The PBI fabric launched by PBI High Performance Products Company in recent years will not become brittle, shrink or crack at high temperatures, and can still maintain the effectiveness of fire suits at high temperatures. However, PBI products are expensive, which limits their application and promotion in related fields.

[0004] High-performance fibers such as polyimide fibers and poly(p-phenylene benzobisoxazole) fibers have excellent high-temperature resistance, but they are relatively rigid. When blended with aramid fibers commonly used in traditional thermal protective clothing, the difference in mechanical and electrical properties of the fibers leads to many problems such as high static electricity, easy adhesion, increased spinning breakage rate, and uneven fabric structure. The yarn-forming effect is poor, and it is difficult to produce high-temperature resistant fabrics with good comprehensive performance using conventional methods. Therefore, how to prepare a high-temperature resistant fabric to meet the actual needs of firefighting and rescue and industrial protection, avoid the existing aramid fabrics that are easy to shrink, burn, and crack at high temperatures, and ensure the integrity and strength of the fabric after the clothing is exposed to fire, while having good wearability and comfort, is a difficult problem that needs to be solved in this field. Summary of the invention

[0005] In view of this, the present invention provides a high temperature resistant fabric and a preparation method thereof, so as to solve the problems that the existing aramid protective fabrics are prone to shrinkage, burning and brittle cracking at high temperatures, and the problem that polyimide fibers are difficult to use in protective fabrics, and significantly improve the high temperature resistance of protective fabrics. At the same time, through waterproof and antibacterial treatments, the high temperature resistant fabrics have good hydrophobic and antibacterial properties, and improve the wearing comfort and functionality of protective clothing.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A method for preparing a high temperature resistant fabric, the specific preparation steps are as follows: 1) Blending polyimide fiber, meta-aramid fiber, para-aramid fiber and conductive fiber to obtain surface warp and weft yarns; using polyimide filament or para-aramid filament as inner warp and weft yarns; 2) Weaving the surface warp and weft yarns and the inner warp and weft yarns into a double-layer fabric including a surface fabric and an inner fabric, and post-treating the double-layer fabric with a waterproof and antibacterial finishing liquid to obtain a high-temperature resistant fabric; The surface fabric is woven from surface warp and weft yarns, and the inner fabric is woven from inner warp and weft yarns; The surface fabric and the inner fabric are interwoven with warp yarns and weft yarns to form junctions, non-junction positions form a layered structure, and a plurality of junctions form a rhombus or hexagonal structure.

[0007] Preferably, in step 1), the mass ratio of the total mass of the meta-aramid fiber and the para-aramid fiber, the mass ratio of the polyimide fiber and the conductive fiber is 17-70:30-80:1-3; The mass ratio of the meta-aramid fiber to the para-aramid fiber is 5-40:10-60.

[0008] Preferably, before the blending in step 1), the polyimide fiber, the meta-aramid fiber and the para-aramid fiber further independently include a pretreatment step; The pretreatment step is to apply the compound regulator to the fiber surface, and the coating amount of the compound regulator is 1-8% owf; The compound regulator is obtained by mixing an antistatic agent, a smoothing agent and water.

[0009] Preferably, the mass ratio of the antistatic agent, the smoothing agent and water in the compound regulator is 1:10~30:50~100; The antistatic agent includes one or more of antistatic agent SN, antistatic agent JL-WTA, antistatic agent JL-NSX, antistatic agent B-1, antistatic agent B-2 and antistatic agent MOA-3PK; The smoothing agent includes 0# white oil and / or 20# white oil.

[0010] Preferably, in step 2), the mass ratio of the surface warp and weft yarns to the inner warp and weft yarns is 1:0.5-1.

[0011] Preferably, the post-treatment method in step 2) comprises one or more of padding, spraying and roller coating.

[0012] Preferably, the preparation method of the waterproof and antibacterial finishing liquid is: mixing a three-proof finishing agent and an antibacterial agent; The three-proof finishing agent includes a self-roughening silicone finishing agent and / or a waterproof finishing agent; The mass ratio of the three-proof finishing agent to the antibacterial agent is 50:20-40.

[0013] Preferably, the waterproof finishing agent includes one or more of R-001, JL-5618H, JB-8900, F0482, and YG-5600; The antibacterial agent includes one or more of SCJ-2000, HT750, TF-W643, and HANS® AG-503.

[0014] Preferably, the preparation method of the self-roughening organosilicon finishing agent is: Mixing vinyl silicone oil with a platinum catalyst to obtain a first component; Mixing vinyl silicone oil, hydrogen silicone oil and inhibitor to obtain a second component; The first component, the second component and the reinforcing agent are mixed to perform addition reaction to obtain a silicone-containing polymer component, and the obtained silicone-containing polymer component is mixed with an organic solvent and water to obtain a self-roughening silicone finishing agent.

[0015] Another object of the present invention is to provide a high temperature resistant fabric prepared by the preparation method.

[0016] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects: Polyimide fiber and aramid fiber are intrinsically flame-retardant fiber materials, which can make the fabric have excellent flame-retardant properties. Para-aramid fiber filaments and polyimide fiber filaments provide excellent mechanical properties for the fabric, and at the same time improve the heat resistance stability of the high-temperature resistant fabric at high temperatures, so that it can still maintain high mechanical properties for a long time after being burned by high temperature or flame. Therefore, the high-temperature resistant fabric obtained by the present invention has excellent high-temperature resistance, flame-retardant properties and mechanical properties.

[0017] The heat shrinkage properties of the surface fabric and the inner fabric of the high temperature resistant fabric prepared by the present invention are different. On the premise that the surface fabric has excellent high temperature resistance and the inner layer has excellent mechanical properties, the outer layer of the double-layer fabric shrinks into a tight fabric after being heated, and the inner fabric bulges to form an air layer gap, thereby improving the thermal protection of the fabric. The diamond or hexagonal structure makes the fabric bulge higher, the support of the bulge part is better, and the thickness of the air layer is more stable. In addition, under the same gram weight, the double-layer fabric has better air permeability and moisture permeability than the single-layer fabric, and the hand feel is softer, making it more comfortable to wear.

[0018] The polyimide fiber in the high temperature resistant fabric is an intrinsically antibacterial fiber material, and the fabric made with it as raw material has certain antibacterial properties. At the same time, the antibacterial finishing in the post-finishing process can further enhance the antibacterial properties of the fabric, improve the functionality of the protective clothing, and effectively protect the safety and health of the wearer. DETAILED DESCRIPTION

[0019] The present invention provides a method for preparing a high temperature resistant fabric, and the specific preparation steps are as follows: 1) Blending polyimide fiber, meta-aramid fiber, para-aramid fiber and conductive fiber to obtain surface warp and weft yarns; using polyimide filament or para-aramid filament as inner warp and weft yarns; 2) The surface warp and weft yarns and the inner warp and weft yarns are woven into a double-layer fabric including a surface fabric and an inner fabric, and the double-layer fabric is post-treated with a waterproof and antibacterial finishing liquid to obtain a high-temperature resistant fabric.

[0020] In the present invention, the surface fabric is woven from surface warp and weft yarns, and the inner fabric is woven from inner warp and weft yarns.

[0021] In the present invention, the surface fabric and the inner fabric form junctions by interweaving warp yarns and weft yarns, specifically, the warp yarns of the surface fabric are interwoven with the weft yarns of the inner fabric or the warp yarns of the inner fabric are interwoven with the weft yarns of the surface fabric; non-junction point positions form a layered structure, and multiple junction points constitute a rhombus or hexagonal structure.

[0022] In the present invention, the area of ​​the rhombus or hexagonal structure is independently 0.6 to 2.8 cm 2 , specifically 0.8cm 2 , 1cm 2 、1.2cm 2 、1.5cm 2 、1.8cm 2 , 2cm 2 、2.2cm 2 、2.5cm 2 ; The rhombus or hexagonal structures are regularly distributed in a mosaic pattern.

[0023] In the present invention, the mass ratio of the total mass of the meta-aramid fiber and the para-aramid fiber, the polyimide fiber and the conductive fiber in step 1) is 17-70:30-80:1-3, preferably 40-70:40-60:2, and more preferably 50-60:50:2.

[0024] In the present invention, polyimide fiberization has antibacterial properties. When the mass addition amount reaches 70% or more, the high temperature resistant fabric can have an antibacterial effect, specifically 70%, 72%, 75%, 78%, and 80%.

[0025] In the present invention, the mass ratio of the meta-aramid fiber to the para-aramid fiber is 5-40:10-60, preferably 10-30:20-50, and more preferably 20:40.

[0026] In the present invention, the hydrophilic finishing operation in step 1) is as follows: the blended fibers are immersed in a hydrophilic finishing slurry, and after the immersion, the fibers are dried to complete the hydrophilic finishing.

[0027] In the present invention, the polyimide filaments include one or more of ordinary polyimide filaments, high-modulus and high-strength polyimide filaments, or ultra-high-temperature-resistant polyimide filaments.

[0028] In the present invention, before the blending in step 1), the polyimide fiber, the meta-aramid fiber and the para-aramid fiber further independently include a pretreatment step.

[0029] In the present invention, the pretreatment step is to apply the compound regulator to the fiber surface, and the coating amount of the compound regulator is 1-8% owf, and the coating amount can specifically be 2% owf, 3% owf, 4% owf, 5% owf, 6% owf, and 7% owf.

[0030] In the present invention, the compound regulator is obtained by mixing an antistatic agent, a smoothing agent and water.

[0031] In the present invention, the mass ratio of the antistatic agent, the smoothing agent and water is 1:10-30:50-100, preferably 1:15-25:60-80, and more preferably 1:20:70.

[0032] In the present invention, the antistatic agent in the compound regulator includes one or more of antistatic agent SN, antistatic agent JL-WTA, antistatic agent JL-NSX, antistatic agent B-1, antistatic agent B-2 and antistatic agent MOA-3PK.

[0033] In the present invention, the smoothing agent includes 0# white oil and / or 20# white oil.

[0034] In the present invention, the relative humidity of the subsequent spinning and weaving processes is maintained at ≥60%RH, specifically 62%RH, 65%RH, 68%RH, 70%RH, 72%RH, 75%RH.

[0035] In the present invention, polyimide fiber and aramid fiber have large differences in physical properties, such as different modulus, strong fiber rigidity, easy slip, high specific resistance, easy to generate static electricity, and easy to appear winding around the cylinder and roller during the blending process. Therefore, before blending, the polyimide fiber and aramid fiber are pretreated with a compound regulator to control the fiber regain on the machine at 10%~15%, which can avoid static electricity in the blending and subsequent processes, improve the cohesion between fibers, improve the uniformity of yarn, and ensure the spinning quality.

[0036] In the present invention, the mass ratio of the surface warp and weft yarns to the inner warp and weft yarns in step 2) is 1:0.5-1, preferably 1:0.6-0.9, and more preferably 1:0.8.

[0037] In the present invention, the post-treatment method in step 2) includes one or more of padding, spraying and roller coating.

[0038] In the present invention, the preparation method of the waterproof and antibacterial finishing liquid is: mixing the three-proof finishing agent and the antibacterial agent to obtain the waterproof and antibacterial finishing liquid.

[0039] In the present invention, the triple-proof finishing agent includes a self-roughening type silicone finishing agent and / or a waterproof finishing agent.

[0040] In the present invention, the mass ratio of the three-proof finishing agent to the antibacterial agent is 50:20-40, preferably 50:25-35, and more preferably 50:30.

[0041] In the present invention, the waterproof finishing agent includes one or more of R-001, JL-5618H, JB-8900, F0482, and YG-5600.

[0042] In the present invention, the antibacterial agent includes one or more of SCJ-2000, HT750, TF-W643, and HANS® AG-503.

[0043] In the present invention, the preparation method of the self-roughening organosilicon finishing agent is: Mixing vinyl silicone oil with a platinum catalyst to obtain a first component; Mixing vinyl silicone oil, hydrogen silicone oil and inhibitor to obtain a second component; The first component, the second component and the reinforcing agent are mixed to perform addition reaction to obtain a silicone-containing polymer component, and the obtained silicone-containing polymer component is mixed with an organic solvent and water to obtain a self-roughening silicone finishing agent.

[0044] In the present invention, the polarity of the organic solvent is less than the polarity of water.

[0045] In the present invention, the vinyl silicone oil preferably includes vinyl-terminated polydimethylsiloxane and / or vinyl-terminated polymethylvinylsiloxane; the viscosity of the vinyl silicone oil is preferably 1000-100000 mPa·s. When the vinyl silicone oil is any of the above two types, the present invention has no special restrictions on the ratio of different types of vinyl silicone oils, and any ratio is acceptable.

[0046] The present invention has no particular limitation on the source and specific type of the platinum catalyst, and any commercially available product known in the art may be used. In an embodiment of the present invention, the platinum catalyst is specifically a Custer platinum catalyst (5000ppm, Dongguan Zhongxin Silicone Material Co., Ltd.).

[0047] In the present invention, the mass ratio of the vinyl silicone oil to the platinum catalyst in the first component is preferably 100.5-110.5:1, more preferably 100.5-105.5:1.

[0048] The present invention has no particular limitation on the conditions for mixing the vinyl silicone oil and the platinum catalyst. The materials can be uniformly mixed according to a process well known in the art. In the embodiment of the present invention, the mixing is carried out under mechanical stirring at a speed of 1200 r / min for 15 min.

[0049] In the present invention, the hydrogen content of the hydrogen-containing silicone oil is preferably 1.2-1.6%; the hydrogen-containing silicone oil is preferably one or two of end-chain hydrogen-containing silicone oil and side-chain hydrogen-containing silicone oil; when the hydrogen-containing silicone oil is the above two, the present invention has no special limitation on the ratio of different types of hydrogen-containing silicone oils, and any ratio is acceptable.

[0050] In the present invention, the inhibitor preferably includes 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (CAS No. 2554-06-5), 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol or 3,7,11-trimethyldodecyn-3-ol.

[0051] In the present invention, the mass ratio of the vinyl silicone oil, the hydrogen-containing silicone oil and the inhibitor in the second component is preferably 10.5-13.5:6-8:1, and more preferably 11.5-12.5:6-8:1.

[0052] The present invention has no particular limitation on the mixing conditions of the vinyl silicone oil, hydrogenated silicone oil and inhibitor, and the materials can be uniformly mixed according to a process well known in the art; in the embodiment of the present invention, the mechanical stirring is carried out at a speed of 1200 r / min for 15 min.

[0053] In the present invention, the reinforcing agent preferably includes vinyl MQ silicone resin; the vinyl MQ silicone resin preferably includes methyl vinyl MQ silicone resin and / or vinyl phenyl MQ silicone resin; the M / Q ratio of the vinyl MQ silicone resin is 0.5 to 1.5. When the vinyl MQ silicone resin is any of the above two types, the present invention has no special restrictions on the ratio of different types of vinyl MQ silicone resins, and any ratio is acceptable.

[0054] In the present invention, the mass ratio of the first component, the second component and the reinforcing agent is preferably 1:1:0.25-5.3, more preferably 1:1:0.6-5.3, and further preferably 1:1:0.86-2.

[0055] In the present invention, vinyl silicone oil reacts with hydrogen-containing silicone oil under the action of a catalyst, and the second component can be stably stored due to the presence of an inhibitor, and the first component (containing a catalyst) and the second component are mixed to undergo a polymerization reaction to form a polymer; at the same time, the reinforcing agent vinyl MQ silicone resin and the vinyl silicone oil both contain double bonds, which will undergo an addition reaction with the silicon-hydrogen bond in the hydrogen-containing silicone oil. In the present invention, the introduction of a reinforcing agent into the organosilicon polymer can increase the stability of the self-roughening structure, thereby making the performance of the finishing agent better.

[0056] In the present invention, the organic solvent preferably includes one or more of tetrahydrofuran, ethyl acetate, n-hexane, dichloromethane and chloroform; when the organic solvent is two or more of the above, the present invention has no special limitation on the ratio of different types of organic solvents, and any ratio is acceptable.

[0057] In the present invention, the mass ratio of water to organic solvent is preferably 1-4:1, more preferably 2.33-4:1; the ratio of the mass of the silicone polymer component to the total mass of organic solvent and water is preferably 1-1.5:100, more preferably 1.03-1.43:100, further preferably 1.03-1.33:100.

[0058] The present invention has no particular limitation on the conditions for mixing the first component, the second component and the reinforcing agent. The materials can be uniformly mixed according to a process well known in the art. In the embodiment of the present invention, the mixing is specifically carried out at 1200 r / min for 30 seconds.

[0059] In the present invention, the mixture obtained by mixing the first component, the second component and the reinforcing agent is preferably dissolved in an organic solvent, and water is added to disperse. In the present invention, the stirring speed of the dispersion is preferably 2000-10000 r / min, more preferably 4000-5000 r / min, and the dispersion time is preferably 5-30 min, more preferably 8-10 min.

[0060] In the present invention, the self-roughening organosilicon finishing agent can be used for post-finishing of aramid / polyimide blended fabrics, so that the high temperature resistant fabrics have excellent hydrophobic properties while having flame retardant properties and high temperature resistant properties.

[0061] Another object of the present invention is to provide a high temperature resistant fabric prepared by the preparation method.

[0062] In the present invention, when the high temperature resistant fabric is used, it is preferred that the inner fabric is close to the human body and the surface fabric is away from the human body.

[0063] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] The sources of raw materials used in all embodiments of the present invention are as follows: Polyimide staple fiber (polyimide fiber) (1.5D*51mm, Jiangsu Xiannuo New Material Technology Co., Ltd.), meta-aramid staple fiber (meta-aramid fiber) (Tametar 1.5D*51mm, Yantai Taihe New Material Sales Co., Ltd.), para-aramid staple fiber (para-aramid fiber) (Taparan 1.5D*51mm, Yantai Taihe New Material Sales Co., Ltd.), conductive fiber (3.0D*51mm, Shanghai Eight Color Masterbatch), para-aramid filament (200D, 400D, Yantai Taihe New Material Sales Co., Ltd.), polyimide filament (ordinary polyimide filament) (200D, Jiangsu Xiannuo New Material Technology Co., Ltd.), high modulus and high strength polyimide filament (600D, Jiangsu Xiannuo New Material Technology Co., Ltd.), ultra-high temperature resistant polyimide filament (1.7D, Jiangsu Xiannuo New Material Technology Co., Ltd.) Antistatic agent SN: Shandong Juli Antistatic Technology Co., Ltd.; Smoothing agent 0# white oil: Weifang Chenxing Chemical Technology Co., Ltd.; Hydrophilic finishing agent AS-6163: Zhejiang Jinguang Industrial Co., Ltd.; Antibacterial agent SCJ-2000: Beijing Jieershuang High-tech Company; Penetrant JFC-2: Jinan Lanjue Trading Co., Ltd.; Polydimethylsiloxane and curing agent Sylgard 184: Dow Corning; Platinum catalyst: Custer Platinum Catalyst, 5000ppm, Dongguan Zhongxin Silicone Material Co., Ltd.; Hydrogenated silicone oil XHG-202: Zhejiang Xin'an Chemical Group Co., Ltd.; Inhibitor: 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (≥97%), Shanghai Aladdin Biochemical Technology Co., Ltd.; Methyl vinyl MQ silicone resin Wynca-5325: Zhejiang Xin'an Chemical Group Co., Ltd.

[0065] Example 1

[0066] A compound regulator consisting of antistatic agent SN, smoothing agent 0# white oil and water in a mass ratio of 1:10:50 is applied to the surface of polyimide fiber, meta-aramid fiber and para-aramid fiber, and the coating amount is 5% owf for standby use.

[0067] Meta-aramid fiber, para-aramid fiber, polyimide fiber and conductive fiber are blended in a mass ratio of 38:10:50:2 to obtain surface yarn. Para-aramid filaments are spun to form inner yarn. The surface warp and weft yarns and the inner warp and weft yarns are woven into a double-layer fabric including a surface fabric and an inner fabric. The surface fabric is woven from the surface warp and weft yarns, and the inner fabric is woven from the inner warp and weft yarns. The surface fabric and the inner fabric are interwoven by warp and weft to form junctions, and non-junction positions form a layered structure. Multiple junctions form a rhombus structure (the area of ​​each rhombus structure is 1.4 cm 2 ). The mass ratio of the surface warp and weft yarns to the inner warp and weft yarns is 1:0.5.

[0068] The woven high-temperature resistant double-layer fabric is washed, dried, applied with waterproof and antibacterial finishing liquid, shaped and baked to obtain the high-temperature resistant fabric.

[0069] The step of applying waterproof and antibacterial finishing liquid is as follows: soaking the yarn in a slurry containing a self-roughening type silicone finishing agent and an antibacterial agent (mass ratio is 50:30), keeping it for 30 seconds and then drying it, the drying temperature is 120°C, to obtain a self-roughening surface.

[0070] The preparation method of the self-roughening silicone finishing agent is as follows: at room temperature, 50.25 g of vinyl-terminated polydimethylsiloxane (viscosity 1000 mPa·s) and 0.5 g of platinum catalyst (5000 ppm) are weighed in a beaker, and mechanically stirred at a speed of 1200 r / min for 15 min until they are evenly mixed to obtain a first component; 37.75 g of vinyl-terminated polydimethylsiloxane (viscosity 100000 mPa·s), 18 g of hydrogen-containing silicone oil (hydrogen content 1.6%) and 3 g of inhibitor (2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane) are placed in a beaker, and stirred at a speed of 1200 r / min for 15 min to obtain a second component; 10 g of the first component and the second component are weighed in a mass ratio of 1:1, 3.3 g of methyl vinyl MQ silicone resin (M / Q ratio is 0.71) is added and stirred at 1200 r / min for 15 min. The mixture was stirred at 4000 r / min for 30 seconds, and the obtained mixture was dissolved in 300 g of tetrahydrofuran. Another 700 g of deionized water was injected into the mixture under high-speed stirring conditions (4000 r / min), and dispersed for 10 minutes to obtain a self-roughening organosilicon finishing agent.

[0071] Example 2 The difference between this embodiment and embodiment 1 is that the plurality of joint points of the surface fabric and the inner fabric form a hexagonal structure (the area of ​​each hexagonal structure is 0.9 cm 2 ), and the mass ratio of the surface warp and weft yarns to the inner warp and weft yarns is 1:0.75.

[0072] Example 3 The only difference between this embodiment and embodiment 1 is that the blending ratios of the surface meta-aramid fiber, para-aramid fiber, polyimide fiber and conductive fiber are adjusted to 10%, 28%, 60% and 2% respectively.

[0073] Example 4

[0074] The difference between this embodiment and embodiment 1 is that the blending ratio of the surface meta-aramid fiber, para-aramid fiber, polyimide fiber and conductive fiber is adjusted to 8%, 10%, 80% and 2%; and the mass ratio of the self-roughening silicone finishing agent and the antibacterial agent in the waterproof finishing liquid is 50:15.

[0075] Example 5

[0076] The difference between this embodiment and embodiment 1 is that the blending ratio of the surface meta-aramid fiber, para-aramid fiber, polyimide fiber and conductive fiber is adjusted to 10%, 28%, 60% and 2%; and the high modulus and high strength polyimide filament is spun to form the inner layer yarn, and the mass ratio of the self-roughening finishing agent and the antibacterial agent for water-repellent finishing is 50:0.

[0077] Comparative test: Aramid fabric 1 (9352), aramid fabric 2 (53610), imported high temperature resistant fabric 1 (Japan PBI) and imported high temperature resistant fabric 2 (Ibena PBI) were used as comparative examples and the fabrics prepared in Examples 1 to 5 were tested for relevant properties. The test results are shown in Table 1.

[0078] Original breaking strength: Test the breaking strength of fabrics according to GB / T 3923.1-2013; Breaking strength after heat treatment at 400℃ for 5 minutes: The fabric was treated in a muffle furnace at 400℃ for 5 minutes under dry heat. After cooling to room temperature, the breaking strength of the fabric was tested in accordance with GB / T 3923.1-2013. Breaking strength after heat treatment at 400℃ for 30min: The fabric was treated in a muffle furnace at 400℃ for 30min under dry heat. After cooling to room temperature, the breaking strength of the fabric was tested in accordance with GB / T 3923.1-2013. Burn-off time: Fix two butane torches (external flame temperature 1000~1500℃) on a torch stand on the same horizontal line, hang a 2.5cm*20cm long fabric sample on a horizontal sample stand about 40cm high, and hang a 65g weight under each sample. After adjusting the gas flow and flame size, move the torch holder parallel to the front of the fabric, so that the center of the outer flame of the torch flame contacts the center point of the fabric sample, record the time from the start of the fire to the break of the sample, conduct three parallel tests, and take the average value of the three tests; Antibacterial rate: Test the antibacterial properties (antibacterial rate) of fabrics according to GB / T 20944.3-2008; Table 1 Related performance test results Note: Mechanical properties (breaking strength) and high temperature resistance (burn-off time) are tested in the warp and weft directions of each fabric respectively. The value marked in the table is the worse value in the warp or weft direction of each fabric, that is, the lowest performance value that the fabric can achieve.

[0079] It can be seen from Table 1 that, compared with aramid protective fabrics and imported high-temperature resistant fabrics, the high-temperature resistant fabrics prepared in Examples 1 to 5 have good original mechanical properties (breaking strength), excellent high-temperature resistance (breaking strength and burning time after heat treatment) and antibacterial properties.

[0080] Among them, comparing Examples 1 and 2, when the double-layer fabric is connected in a manner to form raised shapes of rhombuses and hexagons of specific sizes, it has little effect on its performance.

[0081] Comparing Example 2 with 1, 3, 4, and 5, when the content of the inner layer filaments is higher, the strength of the fabric is relatively higher.

[0082] Compared with Examples 1, 3 and 4, when the content of the surface polyimide fiber is higher, the high temperature resistance of the fabric is better.

[0083] Comparing Examples 1 and 3, 1 and 4, and 1 and 5, the antibacterial effect of the fabric is better (or less antibacterial agent is required to achieve excellent antibacterial properties) when the polyimide fiber content is higher.

[0084] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a high temperature resistant fabric, characterized in that: The specific preparation steps are as follows: 1) Blending polyimide fiber, meta-aramid fiber, para-aramid fiber and conductive fiber to obtain surface warp and weft yarns; using polyimide filament or para-aramid filament as inner warp and weft yarns; 2) Weaving the surface warp and weft yarns and the inner warp and weft yarns into a double-layer fabric including a surface fabric and an inner fabric, and post-treating the double-layer fabric with a waterproof and antibacterial finishing liquid to obtain a high-temperature resistant fabric; The surface fabric is woven from surface warp and weft yarns, and the inner fabric is woven from inner warp and weft yarns; The surface fabric and the inner fabric are interwoven with warp yarns and weft yarns to form junctions, non-junction positions form a layered structure, and a plurality of junctions form a rhombus or hexagonal structure.

2. The method for preparing a high temperature resistant fabric according to claim 1, characterized in that: In step 1), the total mass ratio of the meta-aramid fiber and the para-aramid fiber, the polyimide fiber and the conductive fiber is 17-70:30-80:1-3; The mass ratio of the meta-aramid fiber to the para-aramid fiber is 5-40:10-60.

3. The method for preparing a high temperature resistant fabric according to claim 2, characterized in that: Before the blending in step 1), the polyimide fiber, the meta-aramid fiber and the para-aramid fiber also independently include a pretreatment step; The pretreatment step is to apply the compound regulator to the fiber surface, and the coating amount of the compound regulator is 1-8% owf; The compound regulator is obtained by mixing an antistatic agent, a smoothing agent and water.

4. The method for preparing a high temperature resistant fabric according to claim 3, characterized in that: The mass ratio of the antistatic agent, the smoothing agent and water in the compound regulator is 1:10~30:50~100; The antistatic agent includes one or more of antistatic agent SN, antistatic agent JL-WTA, antistatic agent JL-NSX, antistatic agent B-1, antistatic agent B-2 and antistatic agent MOA-3PK; The smoothing agent includes 0# white oil and / or 20# white oil.

5. The method for preparing a high temperature resistant fabric according to claim 4, characterized in that: The mass ratio of the surface warp and weft yarns to the inner warp and weft yarns in step 2) is 1:0.5~1.

6. The method for preparing a high temperature resistant fabric according to claim 5, characterized in that: The post-treatment method in step 2) includes one or more of padding, spraying and roller coating.

7. The method for preparing a high temperature resistant fabric according to any one of claims 1 to 6, characterized in that: The preparation method of the waterproof and antibacterial finishing liquid is as follows: a three-proof finishing agent and an antibacterial agent are mixed to obtain the waterproof and antibacterial finishing liquid; The three-proof finishing agent includes a self-roughening silicone finishing agent and / or a waterproof finishing agent; The mass ratio of the three-proof finishing agent to the antibacterial agent is 50:20-40.

8. The method for preparing a high temperature resistant fabric according to claim 7, characterized in that: The waterproof finishing agent includes one or more of R-001, JL-5618H, JB-8900, F0482, and YG-5600; The antibacterial agent includes one or more of SCJ-2000, HT750, TF-W643, and HANS® AG-503.

9. The method for preparing a high temperature resistant fabric according to claim 8, characterized in that: The preparation method of the self-roughening organosilicon finishing agent is as follows: Mixing vinyl silicone oil with a platinum catalyst to obtain a first component; Mixing vinyl silicone oil, hydrogen silicone oil and inhibitor to obtain a second component; The first component, the second component and the reinforcing agent are mixed to perform addition reaction to obtain a silicone-containing polymer component, and the obtained silicone-containing polymer component is mixed with an organic solvent and water to obtain a self-roughening silicone finishing agent.

10. The high temperature resistant fabric prepared by the preparation method according to any one of claims 1 to 9.

Images