Flame retardant, chemical proof and radiation proof fabric and preparation method thereof

Abstract

The invention relates to the technical field of fabric production, in particular to a flame-retardant, chemical-proof and radiation-proof fabric and a preparation method thereof; the flame-retardant, chemical-proof and radiation-proof fabric is composed of the following raw materials in parts by weight: 20 to 30 parts of flame-retardant fiber, 20 to 30 parts of chemical-proof fiber, 12 to 15 parts of chitin fiber, 12 to 15 parts of nano-silver fiber and 30 to 50 parts of radiation-proof liquid; wherein the preparation process of the flame-retardant, chemical-proof and radiation-proof fabric is as follows: S1, weaving the flame-retardant fiber, chemical-proof fiber, chitin fiber and nano-silver fiber into a blended fabric; S2, impregnating the obtained blended fabric in the radiation-proof liquid; S3, after the impregnation is completed, washing the impregnated fabric with deionized water, drying, and shaping to obtain a finished flame-retardant, chemical-proof and radiation-proof fabric; the flame-retardant, chemical-proof and radiation-proof fabric prepared by the invention not only has good flame-retardant performance, but also has excellent radiation and chemical protection performance, and effectively guarantees its quality.

Description

Technical Field

[0001] The invention relates to the technical field of fabric production, and in particular to a flame retardant, chemical proof and radiation proof fabric and a preparation method thereof. Background Art

[0002] Fabric is the material used to make clothing. As one of the three elements of clothing, fabric can not only interpret the style and characteristics of clothing, but also directly influence the color and shape of clothing.

[0003] Chemical protective clothing is the main equipment to protect the lives of emergency rescue personnel when dealing with hazardous chemical accidents. Its core component is chemical protective fabric. In addition, hazardous chemical accidents are often accompanied by flash fires and deflagrations, so the flame retardancy of chemical protective fabrics is also required.

[0004] Based on this, the present invention provides a flame retardant, chemical resistant and radiation resistant fabric and a preparation method thereof to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a flame retardant, chemical and radiation proof fabric and a preparation method thereof. The prepared flame retardant, chemical and radiation proof fabric not only has good flame retardant properties, but also has excellent radiation and chemical protection properties, effectively ensuring its quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides a flame retardant, chemical and radiation proof fabric, which is composed of the following raw materials in parts by weight: 20 to 30 parts of flame retardant fiber, 20 to 30 parts of chemical proof fiber, 12 to 15 parts of chitin fiber, 12 to 15 parts of nano silver fiber and 30 to 50 parts of radiation proof liquid;

[0008] The preparation process of the flame retardant, chemical resistant and radiation resistant fabric is as follows:

[0009] S1. Weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric;

[0010] S2, dyeing the obtained blended fabric in radiation protection liquid;

[0011] S3. After dyeing is completed, the dyed fabric is rinsed with deionized water, dried, and shaped to obtain a finished flame retardant, chemical and radiation proof fabric.

[0012] The present invention is further configured as follows: the preparation process of the flame retardant fiber is as follows:

[0013] Add 25% hydrazine hydrate solution to the base fiber at a bath ratio of 15:1, and treat at 100-110°C for 180-200 minutes;

[0014] After filtration, a sodium hydroxide solution with a mass concentration of 6% is added at a bath ratio of 15:1, and the mixture is treated at 90-100°C for 120-140 minutes. The mixture is then washed with deionized water for 2-4 times and dried to obtain a flame-retardant fiber.

[0015] The present invention is further configured as follows: the preparation process of the basic fiber is as follows:

[0016] The composite material is placed in N-methylpyrrolidone at a solid-liquid ratio of 0.15-0.22 g / mL, and stirred at 50-60°C and 80-120 r / min for 100-120 min;

[0017] After stirring, the temperature is raised to 92-95° C., 170-175% of the mass of the composite material of 1,4-dichloromethoxybutane is added thereto, and the mixture is heated under reflux for 300-340 min, and then washed and filtered with deionized water and methanol in turn, and then dried under vacuum at 60° C. for 4-5 h to obtain a dry product;

[0018] The dried product and N,N-dimethylformamide are stirred at a mass ratio of 1:2.1-2.3 for 100-120 minutes at 50-60°C and 80-120 r / min, and spun to obtain basic fibers.

[0019] The present invention is further configured as follows: the composite material is formed by mixing polyacrylonitrile and bisphenol A-bis(diphenyl phosphate) in a mass ratio of 1:0.02-0.12.

[0020] The present invention is further configured as follows: the preparation process of the chemical-proof fiber is as follows:

[0021] Place polyvinyl butyral in a composite solvent at a solid-liquid ratio of 0.05-0.15 g / mL, and stir at 120-140 r / min for 10-12 hours;

[0022] After the stirring is completed, lanthanum acetate with a mass percentage of 0.5-0.6% of the mass of polyvinyl butyral and activated carbon with a mass percentage of 1.2-1.5% of the mass of polyvinyl butyral are added thereto, and the stirring treatment is continued for 6-8 hours, and spinning is performed to obtain chemical-resistant fibers.

[0023] The present invention is further configured as follows: the composite solvent is formed by mixing n-propanol and ethanol in a mass ratio of 0.7 to 0.9:1.

[0024] The present invention is further configured as follows: the radiation protection liquid is composed of the following substances in parts by weight: 20 to 30 parts of a composite extract, 3 to 5 parts of quinic acid, 6 to 8 parts of ethylene glycol stearate and 50 to 70 parts of water:

[0025] The preparation process of the radiation protection liquid is as follows:

[0026] Accurately weigh the composite extract, quinic acid, ethylene glycol stearate and water;

[0027] The composite extract, quinic acid, ethylene glycol stearate and water are placed in a mixing device and fully mixed to obtain a radiation protection liquid.

[0028] The present invention is further configured as follows: the preparation process of the composite extract is as follows:

[0029] The powder is placed in an ethanol aqueous solution with a mass concentration of 70% at a solid-liquid ratio of 0.02 to 0.12 g / mL and extracted for 40 to 46 hours;

[0030] The extract was filtered and evaporated under vacuum at 40°C using a rotary evaporator, and the concentrated extract was freeze-dried for 45 to 48 hours using a freeze dryer to obtain a composite extract;

[0031] The powder is prepared by mixing Zanthoxylum bungeanum peel powder and lychee grass powder in a mass ratio of 1:0.3-0.5.

[0032] The second aspect of the present invention: also provides a method for preparing the flame retardant, chemical resistant and radiation resistant fabric, comprising the following steps:

[0033] Step 1, weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric;

[0034] Step 2, dyeing the obtained blended fabric in a radiation protection liquid;

[0035] Step 3: After dyeing is completed, rinse the dyed fabric with deionized water, spin dry, and shape it to obtain the finished flame retardant, chemical and radiation proof fabric.

[0036] The present invention is further configured as follows: the temperature of the dipping is 25-45° C., and the time is 120-180 min.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention uses flame retardant fiber, chemical protection fiber, chitin fiber, nano silver fiber and radiation protection liquid as raw materials, weaves the flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric, and then impregnates the obtained blended fabric in the radiation protection liquid. After the impregnation is completed, the impregnated fabric is rinsed with deionized water, dried, and shaped to obtain a flame retardant, chemical, and radiation protection fabric. The prepared flame retardant, chemical, and radiation protection fabric not only has good flame retardant properties, but also has excellent radiation and chemical protection properties, effectively ensuring its quality. The flame retardant, chemical, and radiation protection fabric and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0040] Example 1

[0041] The present embodiment provides a flame-retardant, chemical-proof and radiation-proof fabric, which is composed of the following raw materials in parts by weight: 20 parts of flame-retardant fiber, 20 parts of chemical-proof fiber, 12 parts of chitin fiber, 12 parts of nano-silver fiber and 30 parts of radiation-proof liquid.

[0042] Among them, the preparation process of flame retardant fiber is as follows:

[0043] Add 25% hydrazine hydrate solution to the base fiber at a bath ratio of 15:1 and treat at 100°C for 180 minutes;

[0044] After filtration, a sodium hydroxide solution with a mass concentration of 6% was added at a bath ratio of 15:1, and the mixture was treated at 90°C for 120 minutes. The mixture was then washed twice with deionized water and dried to obtain a flame-retardant fiber.

[0045] Further, the preparation process of the basic fiber is as follows:

[0046] The composite material was placed in N-methylpyrrolidone at a solid-liquid ratio of 0.15 g / mL and stirred at 50°C and 80 r / min for 100 min;

[0047] After stirring, the temperature was raised to 92°C, 170% of the mass of the composite material 1,4-dichloromethoxybutane was added thereto, and the mixture was heated under reflux for 300 min, and then washed and filtered with deionized water and methanol in turn, and then dried under vacuum at 60°C for 4 h to obtain a dry product;

[0048] The dried product and N,N-dimethylformamide were stirred at 50° C. and 80 r / min for 100 min in a mass ratio of 1:2.1, and spun to obtain basic fibers.

[0049] In addition, the composite material is mixed with polyacrylonitrile and bisphenol A-bis(diphenyl phosphate) in a mass ratio of 1:0.02-0.12.

[0050] The preparation process of chemical-resistant fiber is as follows:

[0051] Polyvinyl butyral was placed in the composite solvent at a solid-liquid ratio of 0.05 g / mL and stirred at 120 r / min for 10 h;

[0052] After the stirring was completed, lanthanum acetate with a mass percentage of 0.5% of the mass of polyvinyl butyral and activated carbon with a mass percentage of 1.2% of the mass of polyvinyl butyral were added thereto, and the stirring treatment was continued for 6 hours, and spinning was performed to obtain chemical-resistant fibers.

[0053] Furthermore, the composite solvent is prepared by mixing n-propanol and ethanol in a mass ratio of 0.7:1.

[0054] In addition, the radiation protection liquid is composed of the following substances in parts by weight: 20 parts of the composite extract, 3 parts of quinic acid, 6 parts of ethylene glycol stearate and 50 parts of water:

[0055] The preparation process of radiation protection liquid is as follows:

[0056] Accurately weigh the composite extract, quinic acid, ethylene glycol stearate and water;

[0057] The composite extract, quinic acid, ethylene glycol stearate and water are placed in a mixing device and fully mixed to obtain a radiation protection liquid.

[0058] Further, the preparation process of the composite extract is as follows:

[0059] The powder was placed in an ethanol aqueous solution with a mass concentration of 70% at a solid-liquid ratio of 0.02 g / mL and extracted for 40 hours;

[0060] The extract was filtered and evaporated under vacuum at 40°C using a rotary evaporator, and the concentrated extract was freeze-dried for 45 h using a freeze dryer to obtain a composite extract;

[0061] The powder is a mixture of Zanthoxylum bungeanum peel powder and lychee grass powder in a mass ratio of 1:0.3.

[0062] In addition, this embodiment also provides a method for preparing the flame retardant, chemical resistant and radiation resistant fabric, comprising the following steps:

[0063] Step 1, weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric;

[0064] Step 2, dyeing the obtained blended fabric in a radiation protection liquid;

[0065] Step 3: After dyeing is completed, rinse the dyed fabric with deionized water, spin dry, and shape it to obtain the finished flame retardant, chemical and radiation proof fabric.

[0066] The present invention is further configured as follows: the temperature of the dipping is 25° C. and the time is 120 min.

[0067] Example 2

[0068] The preparation method of the flame retardant, chemical and radiation proof fabric provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the flame retardant, chemical and radiation proof fabric in this embodiment are different; the specific raw material composition and the specific preparation method of the flame retardant, chemical and radiation proof fabric in this embodiment are as follows:

[0069] The present embodiment provides a flame-retardant, chemical-proof and radiation-proof fabric, which is composed of the following raw materials in parts by weight: 25 parts of flame-retardant fiber, 25 parts of chemical-proof fiber, 13 parts of chitin fiber, 14 parts of nano-silver fiber and 40 parts of radiation-proof liquid.

[0070] Among them, the preparation process of flame retardant fiber is as follows:

[0071] Add 25% hydrazine hydrate solution to the base fiber at a bath ratio of 15:1 and treat at 105°C for 190 minutes;

[0072] After filtration, a sodium hydroxide solution with a mass concentration of 6% was added at a bath ratio of 15:1, and the mixture was treated at 95°C for 130 minutes. The mixture was washed three times with deionized water and dried to obtain a flame-retardant fiber.

[0073] Further, the preparation process of the basic fiber is as follows:

[0074] The composite material was placed in N-methylpyrrolidone at a solid-liquid ratio of 0.17 g / mL and stirred at 55°C and 100 r / min for 110 min;

[0075] After stirring, the temperature was raised to 94°C, 172% of the mass of the composite material 1,4-dichloromethoxybutane was added thereto, and the mixture was heated under reflux for 320 min, and then washed and filtered with deionized water and methanol in turn, and then dried under vacuum at 60°C for 5 h to obtain a dry product;

[0076] The dried product and N,N-dimethylformamide were stirred at 55° C. and 100 r / min for 110 min in a mass ratio of 1:2.2, and spun to obtain basic fibers.

[0077] In addition, the composite material is mixed with polyacrylonitrile and bisphenol A-bis(diphenyl phosphate) in a mass ratio of 1:0.07.

[0078] The preparation process of chemical-resistant fiber is as follows:

[0079] Polyvinyl butyral was placed in the composite solvent at a solid-liquid ratio of 0.1 g / mL and stirred at 130 r / min for 11 h;

[0080] After the stirring was completed, lanthanum acetate with a mass percentage of 0.6% of the mass of polyvinyl butyral and activated carbon with a mass percentage of 1.3% of the mass of polyvinyl butyral were added thereto, and the stirring treatment was continued for 7 hours, and spinning was performed to obtain chemical-resistant fibers.

[0081] Furthermore, the composite solvent is prepared by mixing n-propanol and ethanol in a mass ratio of 0.8:1.

[0082] In addition, the radiation protection liquid is composed of the following substances in parts by weight: 25 parts of the composite extract, 4 parts of quinic acid, 7 parts of ethylene glycol stearate and 60 parts of water:

[0083] The preparation process of radiation protection liquid is as follows:

[0084] Accurately weigh the composite extract, quinic acid, ethylene glycol stearate and water;

[0085] The composite extract, quinic acid, ethylene glycol stearate and water are placed in a mixing device and fully mixed to obtain a radiation protection liquid.

[0086] Further, the preparation process of the composite extract is as follows:

[0087] The powder was placed in an ethanol aqueous solution with a mass concentration of 70% at a solid-liquid ratio of 0.07 g / mL and extracted for 43 hours;

[0088] The extract was filtered and evaporated under vacuum at 40°C using a rotary evaporator, and the concentrated extract was freeze-dried for 46 h using a freeze dryer to obtain a composite extract;

[0089] The powder is a mixture of Zanthoxylum bungeanum peel powder and lychee grass powder in a mass ratio of 1:0.4.

[0090] In addition, this embodiment also provides a method for preparing the flame retardant, chemical resistant and radiation resistant fabric, comprising the following steps:

[0091] Step 1, weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric;

[0092] Step 2, dyeing the obtained blended fabric in a radiation protection liquid;

[0093] Step 3: After dyeing is completed, rinse the dyed fabric with deionized water, spin dry, and shape it to obtain the finished flame retardant, chemical and radiation proof fabric.

[0094] The present invention is further configured as follows: the temperature of the dipping is 35° C. and the time is 140 minutes.

[0095] Example 3

[0096] The preparation method of the flame retardant, chemical and radiation proof fabric provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the flame retardant, chemical and radiation proof fabric in this embodiment are different; the specific raw material composition and the specific preparation method of the flame retardant, chemical and radiation proof fabric in this embodiment are as follows:

[0097] The present embodiment provides a flame-retardant, chemical-proof and radiation-proof fabric, which is composed of the following raw materials in parts by weight: 30 parts of flame-retardant fiber, 30 parts of chemical-proof fiber, 15 parts of chitin fiber, 15 parts of nano-silver fiber and 50 parts of radiation-proof liquid.

[0098] Among them, the preparation process of flame retardant fiber is as follows:

[0099] Add 25% hydrazine hydrate solution to the base fiber at a bath ratio of 15:1 and treat at 110°C for 1200 minutes;

[0100] After filtration, a sodium hydroxide solution with a mass concentration of 6% was added at a bath ratio of 15:1, and the mixture was treated at 100°C for 140 minutes. The mixture was then washed with deionized water for 4 times and dried to obtain a flame-retardant fiber.

[0101] Further, the preparation process of the basic fiber is as follows:

[0102] The composite material was placed in N-methylpyrrolidone at a solid-liquid ratio of 0.22 g / mL and stirred at 60°C and 120 r / min for 120 min;

[0103] After stirring, the temperature was raised to 95°C, 175% of the mass of the composite material 1,4-dichloromethoxybutane was added thereto, and the mixture was heated under reflux for 340 minutes, and then washed and filtered with deionized water and methanol in turn, and then dried under vacuum at 60°C for 5 hours to obtain a dry product;

[0104] The dried product and N,N-dimethylformamide were stirred at 60° C. and 120 r / min for 120 min in a mass ratio of 1:2.3, and spun to obtain basic fibers.

[0105] In addition, the composite material is mixed with polyacrylonitrile and bisphenol A-bis(diphenyl phosphate) in a mass ratio of 1:0.12.

[0106] The preparation process of chemical-resistant fiber is as follows:

[0107] Polyvinyl butyral was placed in the composite solvent at a solid-liquid ratio of 0.15 g / mL and stirred at 140 r / min for 12 h;

[0108] After the stirring was completed, 0.6% of lanthanum acetate by weight of polyvinyl butyral and 1.5% of activated carbon by weight of polyvinyl butyral were added thereto, and the stirring treatment was continued for 8 hours, and spinning was performed to obtain chemical-resistant fibers.

[0109] Furthermore, the composite solvent is prepared by mixing n-propanol and ethanol in a mass ratio of 0.9:1.

[0110] In addition, the radiation protection liquid is composed of the following substances in parts by weight: 30 parts of the composite extract, 5 parts of quinic acid, 8 parts of ethylene glycol stearate and 70 parts of water:

[0111] The preparation process of radiation protection liquid is as follows:

[0112] Accurately weigh the composite extract, quinic acid, ethylene glycol stearate and water;

[0113] The composite extract, quinic acid, ethylene glycol stearate and water are placed in a mixing device and fully mixed to obtain a radiation protection liquid.

[0114] Further, the preparation process of the composite extract is as follows:

[0115] The powder was placed in an ethanol aqueous solution with a mass concentration of 70% at a solid-liquid ratio of 0.12 g / mL and extracted for 46 hours;

[0116] The extract was filtered and evaporated under vacuum at 40°C using a rotary evaporator, and the concentrated extract was freeze-dried for 48 h using a freeze dryer to obtain a composite extract;

[0117] The powder is a mixture of Zanthoxylum bungeanum peel powder and lychee grass powder in a mass ratio of 1:0.5.

[0118] In addition, this embodiment also provides a method for preparing the flame retardant, chemical resistant and radiation resistant fabric, comprising the following steps:

[0119] Step 1, weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric;

[0120] Step 2, dyeing the obtained blended fabric in a radiation protection liquid;

[0121] Step 3: After dyeing is completed, rinse the dyed fabric with deionized water, spin dry, and shape it to obtain the finished flame retardant, chemical and radiation proof fabric.

[0122] The present invention is further configured as follows: the temperature of the dipping is 45° C. and the time is 180 min.

[0123] Comparative Example 1: The difference from Example 1 is that in this example, an equal amount of polyacrylonitrile fiber is used instead of the flame retardant fiber.

[0124] Comparative Example 2: The difference from Example 1 is that in this example, an equal amount of polyvinyl butyral fiber is used instead of the anti-chemical fiber.

[0125] Comparative Example 3: The difference from Example 1 is that this example does not contain radiation protection liquid.

[0126] Performance test: The flame retardant, chemical and radiation proof fabric samples provided in Examples 1 to 3 and Comparative Examples 1 to 3 are marked as Examples 1 to 3 and Comparative Examples 1 to 3, respectively; and the relevant properties of the flame retardant, chemical and radiation proof fabrics provided in Examples 1 to 3 and Comparative Examples 1 to 3 are tested as follows:

[0127] 1. Flame retardant test: The test method is to use a vertical combustion experiment.

[0128] 2. Chemical protection test: The test method is G / BT23462-2009 (ethyl acetate).

[0129] 3. Radiation protection test: The test method is the measurement method of shielding effectiveness of electromagnetic shielding room GB / T12190-2021, and the shielding effectiveness test is carried out in the frequency range of 150MHz~18GHz.

[0130] The obtained test data are recorded in Tables 1 to 3 below:

[0131] Table 1 Flame retardant performance test results of each group of fabrics

[0132] Group Afterburning time(s) Melting and dripping Example 1 Group 0 none Example 2 Group 0 none Example 3 Group 0 none Comparison group 1 3.2 Partial Melting Comparison of 2 groups 2.1 A small amount of melting Comparison of 3 groups 0 none

[0133] Table 2 Chemical resistance test results of each group of fabrics

[0134] Group Penetration time (h) Example 1 Group ≥8h Example 2 Group ≥8h Example 3 Group ≥8h Comparison group 1 ≤6h Comparison of 2 groups ≤5h Comparison of 3 groups ≥8h

[0135] Table 3 Radiation protection performance test results of each group of fabrics

[0136] Group Electromagnetic radiation protection performance (dB) Example 1 Group 37.12 Example 2 Group 36.87 Example 3 Group 36.92 Comparison group 1 35.21 Comparison of 2 groups 35.55 Comparison of 3 groups 32.34

[0137] By comparing and analyzing the relevant data in Tables 1 to 3, it can be seen that the flame-retardant, chemical-proof and radiation-proof fabric prepared by the present invention not only has good flame-retardant properties, but also has excellent radiation and chemical-proof properties, effectively ensuring its quality. This shows that the flame-retardant, chemical-proof and radiation-proof fabric and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion.

[0138] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0139] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flame retardant, chemical and radiation proof fabric, characterized in that: The invention is composed of the following raw materials in parts by weight: 20 to 30 parts of flame retardant fiber, 20 to 30 parts of chemical protection fiber, 12 to 15 parts of chitin fiber, 12 to 15 parts of nano silver fiber and 30 to 50 parts of radiation protection liquid; The preparation process of the flame retardant, chemical resistant and radiation resistant fabric is as follows: S1. Weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric; S2, dyeing the obtained blended fabric in radiation protection liquid; S3. After dyeing is completed, the dyed fabric is rinsed with deionized water, dried, and shaped to obtain a finished flame retardant, chemical and radiation proof fabric.

2. The flame retardant, chemical resistant and radiation resistant fabric according to claim 1, characterized in that: The preparation process of the flame retardant fiber is as follows: Add 25% hydrazine hydrate solution to the base fiber at a bath ratio of 15:1, and treat at 100-110°C for 180-200 minutes; After filtration, a sodium hydroxide solution with a mass concentration of 6% is added at a bath ratio of 15:1, and the mixture is treated at 90-100°C for 120-140 minutes. The mixture is then washed with deionized water for 2-4 times and dried to obtain a flame-retardant fiber.

3. The flame retardant, chemical resistant and radiation resistant fabric according to claim 2, characterized in that: The preparation process of the basic fiber is as follows: The composite material is placed in N-methylpyrrolidone at a solid-liquid ratio of 0.15-0.22 g / mL, and stirred at 50-60°C and 80-120 r / min for 100-120 min; After stirring, the temperature is raised to 92-95° C., 170-175% of the mass of the composite material of 1,4-dichloromethoxybutane is added thereto, and the mixture is heated under reflux for 300-340 min, and then washed and filtered with deionized water and methanol in turn, and then dried under vacuum at 60° C. for 4-5 h to obtain a dry product; The dried product and N,N-dimethylformamide are stirred at a mass ratio of 1:2.1-2.3 for 100-120 minutes at 50-60°C and 80-120 r / min, and spun to obtain basic fibers.

4. The flame retardant, chemical resistant and radiation resistant fabric according to claim 3, characterized in that: The composite material is prepared by mixing polyacrylonitrile and bisphenol A-bis(diphenyl phosphate) in a mass ratio of 1:0.02-0.

12.

5. The flame retardant, chemical resistant and radiation resistant fabric according to claim 1, characterized in that: The preparation process of the chemical-proof fiber is as follows: Place polyvinyl butyral in a composite solvent at a solid-liquid ratio of 0.05-0.15 g / mL, and stir at 120-140 r / min for 10-12 hours; After the stirring is completed, lanthanum acetate with a mass percentage of 0.5-0.6% of the mass of polyvinyl butyral and activated carbon with a mass percentage of 1.2-1.5% of the mass of polyvinyl butyral are added thereto, and the stirring treatment is continued for 6-8 hours, and spinning is performed to obtain chemical-resistant fibers.

6. The flame retardant, chemical resistant and radiation resistant fabric according to claim 5, characterized in that: The composite solvent is prepared by mixing n-propanol and ethanol in a mass ratio of 0.7 to 0.9:

1.

7. The flame retardant, chemical resistant and radiation resistant fabric according to claim 1, characterized in that: The radiation protection liquid is composed of the following materials in parts by weight: 20 to 30 parts of a composite extract, 3 to 5 parts of quinic acid, 6 to 8 parts of ethylene glycol stearate and 50 to 70 parts of water: The preparation process of the radiation protection liquid is as follows: Accurately weigh the composite extract, quinic acid, ethylene glycol stearate and water; The composite extract, quinic acid, ethylene glycol stearate and water are placed in a mixing device and fully mixed to obtain a radiation protection liquid.

8. The flame retardant, chemical resistant and radiation resistant fabric according to claim 7, characterized in that: The preparation process of the composite extract is as follows: The powder is placed in an ethanol aqueous solution with a mass concentration of 70% at a solid-liquid ratio of 0.02 to 0.12 g / mL and extracted for 40 to 46 hours; The extract was filtered, evaporated under vacuum at 40°C using a rotary evaporator, and the concentrated extract was freeze-dried for 45 to 48 hours using a freeze dryer to obtain a composite extract; The powder is prepared by mixing Zanthoxylum bungeanum peel powder and lychee grass powder in a mass ratio of 1:0.3-0.

5.

9. The method for preparing a flame retardant, chemical resistant and radiation resistant fabric according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, weaving flame retardant fiber, chemical protection fiber, chitin fiber and nano silver fiber into a blended fabric; Step 2, dyeing the obtained blended fabric in a radiation protection liquid; Step 3: After dyeing is completed, rinse the dyed fabric with deionized water, spin dry, and shape it to obtain the finished flame retardant, chemical and radiation proof fabric.

10. The method for preparing a flame retardant, chemical resistant and radiation resistant fabric according to claim 9, characterized in that: The dipping temperature is 25-45° C. and the dipping time is 120-180 min.