Flame-retardant protective fabric and preparation method thereof

Abstract

The invention relates to the technical field of functional fabrics, in particular to a flame-retardant protective fabric and a preparation method thereof. According to the flame-retardant protective fabric, the silicone rubber coating containing the modified flame-retardant filler is arranged on the flame-retardant base cloth, so that the flame-retardant property and the high-temperature resistance of the flame-retardant base cloth are improved; the modified flame-retardant filler comprises a flame-retardant filler and a modified film layer, preferably, the flame-retardant filler is ceramic particles or hollow glass microspheres, and the flame-retardant filler not only plays a role in flame retardance and heat insulation, but also can improve the air permeability; the flame-retardant filler is treated through the surface treatment liquid, a modified film layer is formed on the surface of the flame-retardant filler, the dispersion uniformity and adhesive force of the flame-retardant filler and the silicone rubber coating are improved, the flame-retardant protective fabric does not delaminate at a high temperature, and the prepared flame-retardant protective fabric has good flame retardance, breathability and high temperature resistance at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of functional fabrics, and in particular to a flame retardant protective fabric and a preparation method thereof. Background Art

[0002] In industries such as smelting, casting, and welding, high temperature environments place extremely high demands on workers' protective clothing. Currently, there are a variety of flame-retardant fabrics on the market, such as aramid and flame-retardant cotton. Although these fabrics have certain flame-retardant properties, their protective effects are still insufficient when facing molten metal.

[0003] The existing solution is usually to add a protective coating on the basis of flame retardant fabrics to improve the fabric's resistance to high temperatures and high temperatures. However, traditional coating materials have many shortcomings in terms of high temperature resistance, coating fastness, and comfort.

[0004] In addition, traditional coating materials are prone to failure when faced with extremely high temperatures, and the bonding strength between the coating and the base fabric needs to be improved. Some coating materials have poor moisture permeability during long-term use, resulting in a poor wearing experience. Summary of the invention

[0005] In order to solve the problem of low bonding strength and comfort between the coating and base fabric of existing flame-retardant fabrics, the present application provides a flame-retardant protective fabric and a preparation method thereof.

[0006] In the first aspect, a flame retardant protective fabric: A flame retardant protective fabric, comprising a flame retardant base fabric and a silicone rubber coating formed on the flame retardant base fabric by a silicone rubber coating; The silicone rubber coating comprises component A and component B; The component A comprises, by weight, 10-20 parts of polyamide resin, 15-35 parts of modified flame retardant filler, 1-3 parts of defoaming agent and 25-40 parts of xylene; The B component includes 30-50 parts by weight of epoxy-modified silicone resin; The modified flame retardant filler comprises a flame retardant filler and a modified film layer, wherein the modified film layer is prepared by treating the flame retardant filler with a surface treatment liquid and heating the surface. The surface treatment liquid comprises 3-7 g / L of phytic acid, 3-8 g / L of epoxidized soybean oil, 1-4 g / L of DOPO flame retardant, 0.1-0.3 g / L of triphenylphosphine, and an organic solvent; The flame retardant filler is at least one of ceramic particles and hollow glass microspheres.

[0007] By adopting the above technical solution, a silicone rubber coating is provided on the flame retardant base fabric, and a modified flame retardant filler is used in the silicone rubber coating, so that the flame retardant performance and high temperature resistance of the flame retardant base fabric are further improved.

[0008] The flame retardant filler is made of ceramic particles or hollow glass microspheres, which not only improve the flame retardant and heat insulating properties, but also improve the air permeability of the silicone rubber coating.

[0009] The flame retardant filler is treated with a surface treatment liquid, and phytic acid and epoxy soybean oil introduce more polar groups on the surface of the flame retardant filler. The polar groups can enhance the interaction between the silicone rubber coating and the flame retardant base fabric, and between the modified flame retardant filler and other components, thereby enhancing the adhesion of the silicone rubber coating, so that the silicone rubber coating does not delaminate at a higher temperature; the DOPO flame retardant introduces polycyclic aromatic groups into the silicone rubber coating, and the aromatic groups with larger steric hindrance and the alkane part in the epoxy soybean oil can enhance the dispersion performance of the flame retardant filler; the prepared flame retardant protective fabric has better flame retardancy, air permeability and heat resistance.

[0010] Preferably, the particle size of the flame retardant filler is 100-500 μm.

[0011] Preferably, the organic solvent is at least two of ethanol, acetone and ethyl acetate.

[0012] By adopting the above technical solution, the particle size of the flame retardant filler and the type of the organic solvent are optimized, so that the prepared silicone rubber coating has good uniformity and air permeability.

[0013] Preferably, the surface treatment solution further comprises 5-18 g / L of 30 wt % silica sol.

[0014] Preferably, the dosage of the 30wt% silica sol is 8-15g / L.

[0015] By adopting the above technical solution, silica sol is used in the surface treatment liquid, and silica sol can improve the air permeability and flame retardancy of the modified flame retardant filler; thereby improving the air permeability and flame retardancy of the silicone rubber coating and the flame retardant protective fabric.

[0016] Preferably, the component A of the silicone rubber coating further comprises 2-8 parts by weight of cage-type polyhedral oligomeric silsesquioxane.

[0017] By adopting the above technical scheme, cage-type polyhedral oligomeric silsesquioxane is used in the silicone rubber coating to promote the dispersion of various components in the silicone rubber coating, thereby improving the flame retardancy, air permeability, adhesion and high temperature resistance of the flame retardant protective fabric.

[0018] Preferably, the silicone rubber coating cage-type polyhedral oligomeric silsesquioxane is octa-p-aminophenyl-POSS.

[0019] By adopting the above technical scheme, the cage-type polyhedral oligomeric silsesquioxane is preferably octa-p-aminophenyl-POSS. The phenyl group in the octa-p-aminophenyl-POSS improves the hardness of the silicone rubber coating, and improves the synchronization between the modified flame-retardant filler and other components of the silicone rubber coating under the action of external force or thermal shock, thereby reducing the internal stress of the silicone rubber coating; further, the amine group in the octa-p-aminophenyl-POSS has a strong and good interaction force with the other components in the silicone rubber coating, which can reduce the decrease in coating fastness of the flame-retardant protective fabric under the conditions of external force or thermal shock, thereby improving the high temperature resistance.

[0020] The structure of octa-aminophenyl-POSS is as follows: Preferably, the flame retardant protective fabric further comprises a comfort layer, and the comfort layer is located on a side of the flame retardant base fabric away from the silicone rubber coating.

[0021] Preferably, the flame retardant base fabric is one of flame retardant cotton fabric, flame retardant nitrile / chlorofiber blended fabric, polyimide fabric, polyphenylene sulfide fabric, or is a fabric woven from at least one of aramid, pre-oxidized yarn, polyester, flame retardant viscose, nitrile / chlorofiber, polyimide, polyamide, and glass fiber; the thickness of the silicone rubber coating is 1mm-2mm.

[0022] By adopting the above technical solution, the prepared flame retardant protective fabric has good flame retardant performance, breathable performance and high temperature resistance; setting a comfort layer can improve the comfort performance of the flame retardant protective fabric.

[0023] In a second aspect, the present application provides a method for preparing a flame retardant protective fabric: A method for preparing a flame retardant protective fabric comprises the following preparation steps: Preparation of modified flame retardant filler: after mixing the flame retardant filler and the surface treatment liquid in a mass ratio of 1:(15-25), reacting at 70-90° C. for 2-5 hours, filtering, washing and drying to obtain the modified flame retardant filler; Preparation of silicone rubber coating: After mixing component A and component B, the silicone rubber coating is prepared after high-speed stirring; Preparation of flame-retardant protective fabric: The silicone rubber coating is coated on the flame-retardant base fabric and cured at 30-45° C. to prepare the flame-retardant protective fabric.

[0024] By adopting the above technical scheme, the prepared flame retardant protective fabric has good flame retardant performance, air permeability and high temperature resistance, and the silicone rubber coating in the flame retardant protective fabric has good adhesion to the flame retardant base fabric.

[0025] In summary, this application has the following beneficial effects: 1. A flame retardant protective fabric, wherein a silicone rubber coating containing a modified flame retardant filler is arranged on a flame retardant base fabric, thereby improving the flame retardant performance and high temperature resistance of the flame retardant base fabric; the modified flame retardant filler includes a flame retardant filler and a modified film layer, and preferably the flame retardant filler is ceramic particles or hollow glass microspheres, and the flame retardant filler not only plays a flame retardant and heat insulating role but also improves the air permeability; the flame retardant filler is treated with a surface treatment liquid to form a modified film layer on its surface, thereby improving the dispersion uniformity and adhesion of the flame retardant filler and the silicone rubber coating, and the flame retardant protective fabric does not delaminate at a higher temperature, so that the prepared flame retardant protective fabric has good flame retardant, air permeability and high temperature resistance at the same time.

[0026] 2. Furthermore, the surface treatment liquid also includes silica sol, and the amount of silica sol is optimized to further improve the air permeability and flame retardancy of the flame retardant protective fabric.

[0027] 3. Furthermore, the silicone rubber coating also includes a cage-type polyhedral oligomeric silsesquioxane; and preferably, the cage-type polyhedral oligomeric silsesquioxane is octa-p-aminophenyl-POSS, so that the modified flame retardant filler and other components of the silicone rubber coating have good synchronization under the conditions of external force or thermal shock, thereby reducing the internal stress of the silicone rubber coating; further preferably, the cage-type polyhedral oligomeric silsesquioxane is octa-p-aminophenyl-POSS, and the amine group in the octa-p-aminophenyl-POSS has a strong force with the modified flame retardant filler and other components in the silicone rubber coating, thereby improving the high temperature resistance of the flame retardant protective fabric. DETAILED DESCRIPTION

[0028] raw material Epoxy modified silicone resin (light yellow transparent liquid, solid content 50%, viscosity 60s after applying 4 cups, epoxy value 0.1), polyamide resin (low molecular weight 650 polyamide resin, amine value 220mgKOH / g), defoamer (LT-203 defoamer, viscosity 500pa.s at 20℃), epoxidized soybean oil (viscosity 325mPa·s at 25℃).

[0029] Preparation example of intermediate Preparation Example 1, a modified flame retardant filler, using raw materials as shown in Table 1, and its preparation process is as follows: Phytic acid, epoxy soybean oil (epoxy value 7, acid value 0.4 mg·KOH / g), DOPO flame retardant, triphenylphosphine and an organic solvent were stirred and mixed to prepare a surface treatment liquid.

[0030] The flame retardant filler and the surface treatment liquid were mixed in a mass ratio of 1:20, reacted at 200 r / min and 80° C. for 3 hours, and then filtered, washed with ethanol, and dried in sequence to prepare a modified flame retardant filler.

[0031] Preparation Examples 2 to 3 are modified flame retardant fillers, which differ from Preparation Example 1 in that the types of raw materials, raw material weights and preparation process parameters used in their preparation processes are different, as shown in Table 1.

[0032] Table 1: List of raw material types, raw material weights and preparation process parameters used in the preparation of modified flame retardant fillers in Preparation Examples 1 to 3 Preparation Example 4, a modified flame retardant filler, is different from Preparation Example 1 in that the surface treatment solution further includes 5 g / L of 30 wt% silica sol (average diameter 20 nm, silicon dioxide SiO2 30 wt%, 25 ° C viscosity 5.8 mm 2 / s).

[0033] Preparation Example 5, a modified flame retardant filler, is different from Preparation Example 2 in that the surface treatment solution further includes 8 g / L of 30 wt% silica sol (average diameter 20 nm, silicon dioxide SiO2 30 wt%, 25 ° C viscosity 5.8 mm 2 / s).

[0034] Preparation Example 6, a modified flame retardant filler, which is different from Preparation Example 1 in that the surface treatment solution also includes 10 / L of 30wt% silica sol (average diameter 20nm, silicon dioxide SiO2 30wt%, 25℃ viscosity 5.8mm 2 / s).

[0035] Preparation Example 7, a modified flame retardant filler, the difference from Preparation Example 1 is that the surface treatment liquid also includes 15g / L of 30wt% silica sol (average diameter 20nm, silicon dioxide SiO2 30wt%, 25℃ viscosity 5.8mm 2 / s).

[0036] Preparation Example 8, a modified flame retardant filler, which is different from Preparation Example 1 in that the surface treatment solution also includes 18 g / L of 30 wt% silica sol (average diameter 20 nm, silicon dioxide SiO2 30 wt%, 25 ° C viscosity 5.8 mm 2 / s). Example

[0037] Example 1, a flame retardant protective fabric, using raw materials as shown in Table 2, and its preparation method is as follows: Preparation of silicone rubber coating: Component A and component B are mixed and stirred at high speed to prepare silicone rubber coating.

[0038] The silicone rubber coating is coated on the flame retardant base fabric (a blended fabric prepared by blending aramid fiber and polyester fiber in a mass ratio of 100:60, and the weight of the flame retardant base fabric is 200g / m 2 ) and cured at 35°C to form a silicone rubber coating with a thickness of 1.5 mm to prepare a flame retardant protective fabric.

[0039] Embodiment 2 to Preparation Example 3 are flame retardant protective fabrics, which differ from Embodiment 1 in that the types of raw materials, raw material weights and preparation process settings used in their preparation methods are different, as shown in Table 2.

[0040] Table 2: List of raw material types, raw material weights and preparation process parameters used in the preparation methods of flame retardant protective fabrics of Examples 1 to 3 Examples 4 to 8 are flame-retardant protective fabrics, which differ from Example 1 in that the modified flame-retardant fillers are the modified flame-retardant fillers of Preparation Examples 4 to 8, respectively.

[0041] Example 9, a flame retardant protective fabric, is different from Example 1 in that component A further comprises 6 kg of cage-type polyhedral oligomeric silsesquioxane (using octa-p-aminophenyl-POSS).

[0042] Example 10, a flame retardant protective fabric, is different from Example 1 in that component A further comprises 2 kg of cage-type polyhedral oligomeric silsesquioxane (using octa-p-aminophenyl-POSS).

[0043] Example 11, a flame retardant protective fabric, is different from Example 2 in that component A further comprises 8 kg of cage-type polyhedral oligomeric silsesquioxane (using octa-p-aminophenyl-POSS).

[0044] Example 12 is a flame retardant protective fabric, which is different from Example 9 in that the cage-type polyhedral oligomeric silsesquioxane adopts epoxycyclohexyl-cage-type polysilsesquioxane.

[0045] Example 13, a flame retardant protective fabric, is different from Example 9 in that the cage-type polyhedral oligomeric silsesquioxane is cage-type silsesquioxane esterified with isobutyl maleate.

[0046] Example 14, a flame retardant protective fabric, which is different from Example 1 in that the flame retardant protective fabric also includes a comfort layer, which is woven by a shuttle weaving process using a blended yarn of cotton fiber and protein fiber with a mass ratio of 50:50, and the weight of the comfort layer is 100g / m 2 .

[0047] After the comfort layer and the flame-retardant base fabric are aligned and stacked, they are sewn with polyester sewing thread, and then silicone rubber coating is coated on the flame-retardant base fabric and cured to form, so as to prepare the flame-retardant protective fabric.

[0048] Example 15, a flame retardant protective fabric, differs from Example 14 in that the comfort layer is woven using a blended yarn of cotton fiber and protein fiber in a mass ratio of 100:30 using a shuttle weaving process.

[0049] Comparative Example Comparative Example 1 is a flame retardant protective fabric, which differs from Example 1 in that hollow glass microspheres with a particle size of 300 μm are used to replace the modified flame retardant filler in equal amounts.

[0050] Comparative Example 2 is a flame retardant protective fabric, which differs from Example 1 in that an equal amount of silicon dioxide with a particle size of 300 μm is used to replace the modified flame retardant filler.

[0051] Comparative Example 3 is a flame retardant protective fabric, which differs from Example 1 in that an equal amount of phytic acid is used in the surface treatment liquid to replace the DOPO flame retardant.

[0052] Comparative Example 4 is a flame retardant protective fabric, which differs from Example 1 in that DOPO flame retardant is used in an equal amount to replace phytic acid in the surface treatment liquid.

[0053] Performance testing Test 1: Limiting Oxygen Index The limiting oxygen index of the test sample is tested in accordance with GB / T5454-1997 "Oxygen Index Method for Textile Combustion Performance Test Samples", and the limiting oxygen index is used to characterize the flame retardant properties of the test sample.

[0054] Test 2: Moisture Permeability The moisture permeability of the test sample was tested according to GB / T12704.1-2009.

[0055] Test 3: Maximum Tolerance Temperature The moisture permeability and high temperature resistance of the test samples were tested in accordance with GB / 13767-1992, and the highest tolerable temperature at which the silicone rubber coating of the test samples would not show obvious abnormal forms such as melting adhesion, shrinkage, peeling, etc.

[0056] Test samples: The flame-retardant protective fabrics of Examples 1 to 15 are taken as example samples; the flame-retardant protective fabrics of Comparative Examples 1 to 4 are taken as comparative example samples.

[0057] Test results: The test results of the limiting oxygen index, maximum tolerance temperature and moisture permeability of the flame retardant protective fabrics of Examples 1 to 15 and Comparative Examples 1 to 4 are shown in Table 3.

[0058] Table 3: Test results of limiting oxygen index, maximum tolerance temperature and moisture permeability of flame retardant protective fabrics of Examples 1 to 15 and Comparative Examples 1 to 4 distinguish Limiting oxygen index / % Maximum tolerance temperature / ℃ Moisture permeability / (g / m2·d) Example 1 44.5 1450 8776 Example 2 44.9 1446 8785 Example 3 44.1 1438 8768 Example 4 45.3 1458 8801 Example 5 45.5 1480 8893 Example 6 46.6 1488 8917 Example 7 46.5 1482 8954 Example 8 46.1 1452 8957 Example 9 45.9 1482 8904 Example 10 45.6 1474 8881 Embodiment 11 46.2 1484 8912 Example 12 45.5 1464 8876 Example 13 49.8 1458 8871 Embodiment 14 44.3 1452 8772 Embodiment 15 44.0 1450 8770 Comparative Example 1 40.3 1224 8933 Comparative Example 2 40.5 1258 8460 Comparative Example 3 41.7 1412 8682 Comparative Example 4 42.3 1308 8680 Combining Examples 1 to 15 and Comparative Examples 1 to 4 and Table 3, it can be seen that: Compared with Comparative Examples 1 to 4, Example 1 has a higher limiting oxygen index, maximum tolerance temperature and moisture permeability. This may be because a silicone rubber coating containing a modified flame retardant filler is arranged on the flame retardant base fabric, which improves the flame retardant performance and high temperature resistance of the flame retardant base fabric; the modified flame retardant filler includes a flame retardant filler and a modified film layer, and preferably the flame retardant filler is ceramic particles or hollow glass microspheres, and the flame retardant filler not only plays a flame retardant and heat-insulating role but also improves the air permeability; the flame retardant filler is treated with a surface treatment liquid to form a modified film layer on its surface, which improves the adhesion and uniformity of the flame retardant filler and the silicone rubber coating, so that the prepared flame retardant protective fabric has good air permeability and high temperature resistance; phytic acid containing the flame retardant element P, silica sol, DOPO flame retardant and flame retardant filler are used to improve the flame retardant performance of the flame retardant protective fabric.

[0059] Compared with Example 2, Example 5, and Example 6 to Example 7, compared with Example 1 and Example 8, have higher limiting oxygen index, maximum tolerance temperature and moisture permeability, indicating that silica sol is used in the surface treatment liquid in the preparation of the modified flame retardant filler, and the amount of silica sol is preferably selected, so that the flame retardant protective fabric using the modified flame retardant filler has higher limiting oxygen index, maximum tolerance temperature and moisture permeability; it may be because the use of silica sol in the surface treatment liquid improves the air permeability of the modified flame retardant filler; thereby improving the air permeability of the silicone rubber coating and the flame retardant protective fabric. Performance; when the content of silica sol is too much, the relative content of phytic acid with strong polarity in the silicone rubber coating is reduced, the strength of the silicone rubber coating is reduced, and the interaction between the modified flame retardant filler and other components in the silicone rubber coating is weakened, resulting in the flame retardant protective fabric being susceptible to internal defects when subjected to a high thermal shock, and the maximum tolerance temperature is reduced; preferably, the flame retardant properties of phytic acid containing the flame retardant element P, silica sol, DOPO flame retardant and flame retardant filler are compatible with each other, and their dosage is preferably selected so that the flame retardant protective fabric using the modified flame retardant filler has higher flame retardant performance.

[0060] Compared with Example 1, Example 12 and Example 13, Example 11 has a higher limiting oxygen index, maximum tolerance temperature and moisture permeability, which may be because the use of cage-type polyhedral oligomeric silsesquioxane in the silicone rubber coating promotes the dispersion of the components in the silicone rubber coating, thereby improving the flame retardancy, air permeability and high temperature resistance of the flame retardant protective fabric, and improving the adhesion between the silicone rubber coating and the flame retardant base fabric in the flame retardant protective fabric; the preferred cage-type polyhedral oligomeric silsesquioxane is octaaminophenyl-POSS, and the phenyl group in the octaaminophenyl-POSS improves the hardness of the silicone rubber coating, so that the modified flame retardant filler and other components of the silicone rubber coating have better synchronization under the action of thermal shock, reducing the internal stress of the silicone rubber coating under the action of thermal shock; further, the amine group in the octaaminophenyl-POSS has a strong and good interaction with the modified flame retardant filler and other components in the silicone rubber coating, reducing the decrease in coating fastness of the flame retardant protective fabric under thermal shock conditions, thereby improving the high temperature resistance.

[0061] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A flame retardant protective fabric, characterized in that: It includes a flame retardant base fabric and a silicone rubber coating formed by a silicone rubber coating on the flame retardant base fabric; The silicone rubber coating comprises component A and component B; The component A comprises, by weight, 10-20 parts of polyamide resin, 15-35 parts of modified flame retardant filler, 1-3 parts of defoaming agent and 25-40 parts of xylene; The B component includes 30-50 parts by weight of epoxy-modified silicone resin; The modified flame retardant filler comprises a flame retardant filler and a modified film layer, wherein the modified film layer is prepared by treating the flame retardant filler with a surface treatment liquid and heating the surface. The surface treatment liquid comprises 3-7 g / L of phytic acid, 3-8 g / L of epoxidized soybean oil, 1-4 g / L of DOPO flame retardant, 0.1-0.3 g / L of triphenylphosphine, and an organic solvent; The flame retardant filler is at least one of ceramic particles and hollow glass microspheres.

2. The flame retardant protective fabric according to claim 1, characterized in that: The particle size of the flame retardant filler is 100-500 μm.

3. The flame retardant protective fabric according to claim 1, characterized in that: The organic solvent is at least two of ethanol, acetone and ethyl acetate.

4. The flame retardant protective fabric according to claim 1, characterized in that: The surface treatment solution also includes 5-18 g / L of 30 wt % silica sol.

5. The flame retardant protective fabric according to claim 4, characterized in that: The usage of the 30wt% silica sol is 8-15g / L.

6. The flame retardant protective fabric according to claim 1, characterized in that: The component A of the silicone rubber coating further comprises 2-8 parts by weight of cage-type polyhedral oligomeric silsesquioxane.

7. The flame retardant protective fabric according to claim 6, characterized in that: The silicone rubber coating cage-type polyhedral oligomeric silsesquioxane is octa-p-aminophenyl-POSS.

8. The flame retardant protective fabric according to claim 1, characterized in that: The flame retardant protective fabric further comprises a comfort layer, and the comfort layer is located on a side of the flame retardant base fabric away from the silicone rubber coating.

9. The flame retardant protective fabric according to claim 1, characterized in that: The flame retardant base fabric is one of flame retardant cotton fabric, flame retardant nitrile / chlorofiber blended fabric, polyimide fabric, polyphenylene sulfide fabric, or is a fabric woven from at least one of aramid, pre-oxidized yarn, polyester, flame retardant viscose, nitrile / chlorofiber, polyimide, polyamide, and glass fiber; the thickness of the silicone rubber coating is 1mm-2mm.

10. The method for preparing the flame retardant protective fabric according to any one of claims 1 to 9, characterized in that: The method comprises the following preparation steps: Preparation of modified flame retardant filler: after mixing the flame retardant filler and the surface treatment liquid in a mass ratio of 1:(15-25), reacting at 70-90°C for 2-5h, and then filtering, washing and drying to prepare the modified flame retardant filler; Preparation of silicone rubber coating: After mixing component A and component B, the silicone rubber coating is prepared after high-speed stirring; Preparation of flame-retardant protective fabric: The silicone rubber coating is coated on the flame-retardant base fabric and cured at 30-45° C. to prepare the flame-retardant protective fabric.

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