A fluorine-containing composite film for tritium-proof ventilation air clothing and a preparation method thereof

Abstract

This invention discloses a fluorinated composite membrane for tritium-proof and ventilated airsuits and its preparation method, belonging to the technical field of functional protective clothing. The fluorinated composite membrane for tritium-proof and ventilated airsuits consists of an outer protective layer and a heat-sealing layer. The outer protective layer is a fluorinated resin membrane, and the heat-sealing layer, by weight, comprises the following components: PVDF resin: 40-60 parts, PMMA resin: 20-40 parts, bisphenol A type polyetheretherketone resin: 5-10 parts, tackifier: 5-10 parts, silica: 3-5 parts, antioxidant: 1-2 parts, solvent: 400-900 parts. The fluorinated composite membrane for tritium-proof and ventilated airsuits exhibits low tritium permeability, high flame retardancy, low-temperature heat-sealing properties, and anti-pollution properties. It has broad application prospects in the preparation of tritium protective clothing.

Description

Technical Field

[0001] This invention relates to the technical field of functional protective clothing, and more particularly to a fluorinated composite membrane for tritium-proof and ventilated clothing and its preparation method. Background Technology

[0002] Tritium is a low-energy beta emitter with very high specific activity, belonging to the category of low-toxicity but difficult-to-protect-from radioactive nuclides. The main radiation hazards of tritium come from internal radiation hazards caused by direct inhalation and skin absorption. Regarding personal safety protection against tritium, tritium glove boxes and tritium protective clothing are the primary protective equipment. They can reduce the penetration and harm of tritium into the human body to a certain extent and play an irreplaceable role in tritium processes and tritium protection.

[0003] When selecting tritium-protective clothing, the permeability of the materials is a primary consideration. Tritium-protective clothing made from polymers such as vulcanized rubber, celluloid, polyvinyl chloride, and polyethylene cannot meet the performance requirements due to the high permeability of tritium in these materials. Therefore, there is an urgent need to develop a new type of tritium-permeable composite material to meet the performance requirements of high-performance tritium-protective clothing, which has significant practical implications for the application of tritium-protective clothing. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a fluorinated composite membrane for tritium-proof ventilation clothing and its preparation method. The fluorinated composite membrane for tritium-proof ventilation clothing has low tritium permeability, high flame retardancy, good low-temperature heat-sealing properties, and anti-fouling properties.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a fluorinated composite membrane for tritium-proof and ventilated aircoat, which consists of an outer protective layer and a heat-sealing layer;

[0007] The outer protective layer is a fluorinated resin film.

[0008] The heat-sealing layer comprises, by weight, the following components:

[0009] PVDF resin: 40-60 parts;

[0010] PMMA resin: 20-40 parts;

[0011] Bisphenol A type polyetheretherketone resin: 5-10 parts;

[0012] Tackifier: 5-10 parts;

[0013] Silica: 3-5 parts;

[0014] Antioxidant: 1-2 parts;

[0015] Solvent: 400-900 parts.

[0016] The outer protective layer is made of fluorinated resin film, which has the advantages of high flame retardancy, high barrier properties and low surface energy. However, due to the presence of fluorine in the film, the heat sealing temperature of the tritium-proof ventilation jacket is relatively high, making it difficult to process.

[0017] In order to retain the above-mentioned advantages of fluoropolymer films while solving the problem of not being able to achieve low-temperature heat sealing, the present invention adds the above-mentioned heat-sealing layer to the surface of the outer protective layer.

[0018] The PVDF resin, PMMA resin, and bisphenol A type polyether ether ketone resin in the heat-sealing layer promote each other and have a synergistic effect.

[0019] Among them, PVDF resin and PMMA resin, as the main resins, can significantly increase the low-temperature heat-sealing properties of fluorinated composite films for tritium-proof and ventilated aircoats.

[0020] Preferably, the fluorinated resin in the fluorinated resin membrane is selected from one or more of ETFE, ECTFE, and PCTFE.

[0021] Preferably, in this invention, the melt index of the fluorinated resin in the fluorinated resin film is selected from 10-25 g / 10 min.

[0022] In some specific embodiments of the present invention, the fluorinated resin in the fluorinated resin membrane is specifically 10g / 10min of ETFE resin, 25g / 10min of ECTFE resin, or 25g / 10min of PCTFE resin.

[0023] Preferably, the melt flow index of the PVDF resin is selected from 15-25 g / 10 min; more preferably, it is 15 g / 10 min or 25 g / 10 min.

[0024] Preferably, the melt index of the PMMA resin is selected from 5-10 g / 10 min; more preferably, it is 5 g / 10 min or 10 g / 10 min.

[0025] Preferably, the melt index of the bisphenol A type polyether ether ketone resin is 10-20 g / 10 min; more preferably, it is 10 g / 10 min or 20 g / 10 min.

[0026] Preferably, the tackifier of the present invention is selected from one or more of rosin resin, terpene resin, and petroleum resin.

[0027] Preferably, the antioxidant is selected from one or more of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, dilauryl thiodipropionate, and tris(2,4-di-tert-butyl)phosphite.

[0028] Preferably, the solvent is selected from N,N-dimethylacetamide or N,N-dimethylformamide.

[0029] Preferably, the particle size of the silicon dioxide is 20-40 nm; more preferably, it is 20 nm or 40 nm.

[0030] Preferably, the specific surface area of ​​the silica is 150-300 m². 2 / g.

[0031] More preferably, the heat-sealing layer of the present invention comprises, by weight, the following components:

[0032] PVDF resin: 60 parts;

[0033] PMMA resin: 20 parts;

[0034] Bisphenol A type polyetheretherketone resin: 5 parts;

[0035] Rosin resin: 10 parts;

[0036] Silica: 3 parts;

[0037] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0038] N,N-Dimethylacetamide: 400 parts.

[0039] In a further preferred embodiment of the present invention, the heat-sealing layer comprises, by weight, the following components:

[0040] PVDF resin with a melt flow index of 15 g / 10 min: 60 parts;

[0041] PMMA resin with a melt index of 5 g / 10 min: 20 parts;

[0042] 5 parts of bisphenol A type polyether ether ketone resin with a melt index of 10 g / 10 min;

[0043] Rosin resin: 10 parts;

[0044] Silica with a particle size of 20 nm: 3 parts;

[0045] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0046] N,N-Dimethylacetamide: 400 parts. More preferably, the heat-sealing layer of the present invention comprises, by weight, the following components:

[0047] PVDF resin: 50 parts;

[0048] PMMA resin: 30 parts;

[0049] Bisphenol A type polyetheretherketone resin: 7.5 parts;

[0050] Rosin resin: 7.5 parts;

[0051] Silica: 4 parts;

[0052] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts;

[0053] N,N-Dimethylacetamide: 650 parts.

[0054] More preferably, the heat-sealing layer comprises, by weight, the following components:

[0055] PVDF resin with a melt flow index of 15 g / 10 min: 50 parts;

[0056] PMMA resin with a melt index of 5 g / 10 min: 30 parts;

[0057] 7.5 parts of bisphenol A type polyether ether ketone resin with a melt index of 10 g / 10 min;

[0058] Rosin resin: 7.5 parts;

[0059] Silica with a particle size of 20 nm: 4 parts;

[0060] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts;

[0061] N,N-Dimethylacetamide: 650 parts. More preferably, the heat-sealing layer of the present invention comprises, by weight, the following components:

[0062] PVDF resin: 40 parts;

[0063] PMMA resin: 40 parts;

[0064] Bisphenol A type polyetheretherketone resin: 10 parts;

[0065] Rosin resin: 5 parts;

[0066] Silica: 5 parts;

[0067] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0068] N,N-Dimethylacetamide: 400 parts.

[0069] More preferably, the heat-sealing layer comprises, by weight, the following components:

[0070] PVDF resin with a melt flow index of 15 g / 10 min: 40 parts;

[0071] PMMA resin with a melt flow index of 5 g / 10 min: 40 parts;

[0072] 10 parts of bisphenol A type polyether ether ketone resin with a melt index of 10 g / 10 min;

[0073] Rosin resin: 5 parts;

[0074] Silica with a particle size of 20 nm: 5 parts;

[0075] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0076] N,N-Dimethylacetamide: 400 parts. More preferably, the heat-sealing layer of the present invention comprises, by weight, the following components:

[0077] PVDF resin: 60 parts;

[0078] PMMA resin: 20 parts;

[0079] Bisphenol A type polyetheretherketone resin: 5 parts;

[0080] Terpene resin: 10 parts;

[0081] Silica: 3 parts;

[0082] Dilauryl thiodipropionate: 2 parts;

[0083] N,N-Dimethylformamide: 900 parts.

[0084] More preferably, the heat-sealing layer comprises, by weight, the following components:

[0085] PVDF resin with a melt flow index of 25 g / 10 min: 60 parts;

[0086] PMMA resin with a melt index of 10 g / 10 min: 20 parts;

[0087] 5 parts of bisphenol A type polyether ether ketone resin with a melt index of 20 g / 10 min;

[0088] Terpene resin: 10 parts;

[0089] Silica with a particle size of 40nm: 3 parts;

[0090] Dilauryl thiodipropionate: 2 parts;

[0091] N,N-Dimethylformamide: 900 parts. More preferably, the heat-sealing layer of the present invention comprises, by weight, the following components:

[0092] PVDF resin: 60 parts;

[0093] PMMA resin: 20 parts;

[0094] Bisphenol A type polyetheretherketone resin: 5 parts;

[0095] Petroleum resin: 10 parts;

[0096] Silica: 3 parts;

[0097] Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts;

[0098] N,N-Dimethylformamide: 900 parts.

[0099] More preferably, the heat-sealing layer comprises, by weight, the following components:

[0100] PVDF resin with a melt flow index of 25 g / 10 min: 60 parts;

[0101] PMMA resin with a melt index of 10 g / 10 min: 20 parts;

[0102] 5 parts of bisphenol A type polyether ether ketone resin with a melt index of 20 g / 10 min;

[0103] Petroleum resin: 10 parts;

[0104] Silica with a particle size of 40nm: 3 parts;

[0105] Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts;

[0106] N,N-Dimethylformamide: 900 parts. This invention also provides a method for preparing a fluorinated composite membrane for tritium-proof ventilated clothing, comprising the following preparation method:

[0107] 1) Fluorine-containing resin is extruded, cast, and corona-treated to obtain a fluorine-containing resin film as an outer protective layer;

[0108] 2) Mix PVDF resin, PMMA resin, bisphenol A type polyether ether ketone resin, tackifier, silica, antioxidant and solvent, and then coat the mixture onto the surface of the outer protective layer obtained in step 1) to obtain a fluorinated composite film for tritium-proof ventilation clothing.

[0109] In the above preparation method, the extrusion casting in step 1) includes extrusion, cooling, stretching, and winding.

[0110] The extrusion temperature is preferably 260℃-320℃; more preferably 280℃.

[0111] The screw speed for extrusion is preferably 30-50 rpm / min; more preferably 30 rpm / min or 50 rpm / min.

[0112] The frequency of the corona treatment in step 1) is preferably 10-25 kHz; more preferably 10 kHz or 25 kHz.

[0113] The electrode gap for the corona treatment is preferably 1-2 mm; more preferably 1 mm or 2 mm.

[0114] The unwinding speed of the corona treatment is preferably 8-10 m / min; more preferably 8 m / min or 10 m / min.

[0115] The coating method in step 2) of the present invention is not particularly limited and can be any coating method known to those skilled in the art.

[0116] In the above preparation method, the coating in step 2) is preferably applied by dry coating.

[0117] The unwinding speed of the dry coating is preferably 5-8 m / min; more preferably 5 m / min or 8 m / min.

[0118] The preferred coating amount for the dry coating is 10-20 g / m³. 2 More preferably 10g / m 2 Or 20g / m 2 .

[0119] The oven temperature for the dry coating is preferably 60℃-80℃; more preferably 60℃ or 80℃.

[0120] The temperature of the hot press roller for dry coating is preferably 100℃-120℃; more preferably 100℃ or 120℃.

[0121] The pressure of the hot press roller for dry coating is preferably 0.5-1 MPa; more preferably 0.5 MPa or 1 MPa.

[0122] Compared with existing technologies, the fluorinated composite membrane for tritium-protective breathable clothing provided by this invention consists of an outer protective layer and a heat-sealing layer. The outer protective layer is a fluorinated resin membrane, and the heat-sealing layer, by weight, comprises the following components: PVDF resin: 40-60 parts, PMMA resin: 20-40 parts, bisphenol A type polyetheretherketone resin: 5-10 parts, tackifier: 5-10 parts, silica: 3-5 parts, antioxidant: 1-2 parts, solvent: 400-900 parts. This fluorinated composite membrane for tritium-protective breathable clothing exhibits low tritium permeability, high flame retardancy, low-temperature heat-sealing properties, and anti-pollution properties. It has broad application prospects in the preparation of tritium protective clothing. Detailed Implementation

[0123] To further illustrate the present invention, the following detailed description of the fluorinated composite membrane for tritium-proof and ventilated clothing and its preparation method is provided in conjunction with embodiments.

[0124] Example 1

[0125] (1) Preparation of outer protective layer:

[0126] 1 kg of ETFE resin with a melt index of 10 g / 10 min is added to an extruder. The temperature is controlled at 280℃, and the screw speed is controlled at 50 rpm / min. The preform is cooled, stretched, and wound to obtain a fluoropolymer film. The fluoropolymer film is then subjected to corona treatment. The frequency adjustment range of the corona treatment machine is 25 kHz. Typically, the electrode gap is controlled at 2 mm, and the unwinding speed is 10 m / min. After treatment, an outer protective layer is obtained.

[0127] (2) Preparation of heat-sealing layer

[0128] The following raw materials were prepared: 60 parts of PVDF resin with a melt index of 15 g / 10 min, 20 parts of PMMA resin with a melt index of 5 g / 10 min, 5 parts of bisphenol A type polyetheretherketone resin with a melt index of 10 g / 10 min, 10 parts of rosin resin, 3 parts of silica with a particle size of 20 nm, 2 parts of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 400 parts of N,N-dimethylacetamide. These raw materials were added to a reaction vessel and stirred at 500 rpm for 4 hours until homogeneous, yielding a heat-sealing coating.

[0129] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0130] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 5 m / min, and the coating amount is controlled at 20 g / m. 2 The oven temperature is controlled at 80℃, the hot press roller temperature is controlled at 120℃, and the hot press roller pressure is controlled at 1MPa, finally obtaining a fluorinated composite membrane for ventilated clothing.

[0131] Example 2

[0132] (1) Preparation of outer protective layer:

[0133] 1 kg of ETFE resin with a melt index of 10 g / 10 min is added to an extruder. The temperature is controlled at 280℃, and the screw speed is controlled at 50 rpm / min. The preform is cooled, stretched, and wound to obtain a fluoropolymer film. The fluoropolymer film is then subjected to corona treatment. The frequency adjustment range of the corona treatment machine is 25 kHz. Typically, the electrode gap is controlled at 2 mm, and the unwinding speed is 10 m / min. After treatment, an outer protective layer is obtained.

[0134] (2) Preparation of heat-sealing layer

[0135] 50 parts of PVDF resin with a melt index of 15 g / 10 min, 30 parts of PMMA resin with a melt index of 5 g / 10 min, 7.5 parts of bisphenol A type polyetheretherketone resin with a melt index of 10 g / 10 min, 7.5 parts of rosin resin, 4 parts of silica with a particle size of 20 nm, 1.5 parts of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 650 parts of N,N-dimethylacetamide were added to a reactor and stirred at 500 rpm for 4 hours until homogeneous to obtain a heat-sealing coating.

[0136] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0137] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 5 m / min, and the coating amount is controlled at 20 g / m. 2 The oven temperature is controlled at 80℃, the hot press roller temperature is controlled at 120℃, and the hot press roller pressure is controlled at 1MPa, finally obtaining a fluorinated composite membrane for ventilated clothing.

[0138] Example 3

[0139] (1) Preparation of outer protective layer:

[0140] 1 kg of ETFE resin with a melt index of 10 g / 10 min is added to an extruder. The temperature is controlled at 280℃, and the screw speed is controlled at 50 rpm / min. The preform is cooled, stretched, and wound to obtain a fluoropolymer film. The fluoropolymer film is then subjected to corona treatment. The frequency adjustment range of the corona treatment machine is 25 kHz. Typically, the electrode gap is controlled at 2 mm, and the unwinding speed is 10 m / min. After treatment, an outer protective layer is obtained.

[0141] (2) Preparation of heat-sealing layer

[0142] 40 parts of PVDF resin with a melt index of 15 g / 10 min, 40 parts of PMMA resin with a melt index of 5 g / 10 min, 10 parts of bisphenol A type polyetheretherketone resin with a melt index of 10 g / 10 min, 5 parts of rosin resin, 5 parts of silica with a particle size of 20 nm, 2 parts of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 400 parts of N,N-dimethylacetamide were added to a reactor and stirred at 500 rpm for 4 hours until homogeneous to obtain a heat-sealing coating.

[0143] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0144] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 5 m / min, and the coating amount is controlled at 20 g / m.2 The oven temperature is controlled at 80℃, the hot press roller temperature is controlled at 120℃, and the hot press roller pressure is controlled at 1MPa, finally obtaining a fluorinated composite membrane for ventilated clothing.

[0145] Example 4

[0146] (1) Preparation of outer protective layer:

[0147] 1 kg of ECTFE resin with a melt index of 25 g / 10 min was added to an extruder. The temperature was controlled at 260℃ and the screw speed at 30 rpm / min. The preform was cooled, stretched, and wound to obtain a fluoropolymer film. The fluoropolymer film was then subjected to corona treatment. The frequency adjustment range of the corona treatment machine was 10 kHz. The electrode gap was typically controlled at 1 mm, and the unwinding speed was 8 m / min. After treatment, an outer protective layer was obtained.

[0148] (2) Preparation of heat-sealing layer

[0149] The following raw materials were prepared: 60 parts of PVDF resin with a melt index of 25 g / 10 min, 20 parts of PMMA resin with a melt index of 10 g / 10 min, 5 parts of bisphenol A type polyetheretherketone resin with a melt index of 20 g / 10 min, 10 parts of terpene resin, 3 parts of silica with a particle size of 40 nm, 2 parts of dilauryl thiodipropionate, and 900 parts of N,N-dimethylformamide. These raw materials were added to a reaction vessel and stirred at 300 rpm for 2 hours until homogeneous, yielding a heat-sealing coating.

[0150] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0151] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 8 m / min, and the coating amount is controlled at 10 g / m. 2 The oven temperature is controlled at 60℃, the hot press roller temperature is controlled at 100℃, and the hot press roller pressure is controlled at 0.5MPa, finally obtaining a fluorinated composite membrane for ventilated clothing.

[0152] Example 5

[0153] (1) Preparation of outer protective layer:

[0154] 1 kg of PCTFE resin with a melt index of 25 g / 10 min is added to an extruder. The temperature is controlled at 320℃ and the screw speed is controlled at 30 rpm / min. The preform is cooled, stretched, and wound to obtain a fluoropolymer film. The fluoropolymer film is then subjected to corona treatment. The frequency adjustment range of the corona treatment machine is 10 kHz. Typically, the electrode gap is controlled at 1 mm and the unwinding speed is 8 m / min. After treatment, an outer protective layer is obtained.

[0155] (2) Preparation of heat-sealing layer

[0156] The following raw materials were prepared: 60 parts of PVDF resin with a melt index of 25 g / 10 min, 20 parts of PMMA resin with a melt index of 10 g / 10 min, 5 parts of bisphenol A type polyetheretherketone resin with a melt index of 20 g / 10 min, 10 parts of petroleum resin, 3 parts of silica with a particle size of 40 nm, 2 parts of tris(2,4-di-tert-butyl)phenyl phosphite, and 900 parts of N,N-dimethylformamide. These raw materials were added to a reactor and stirred at 300 rpm for 2 hours until homogeneous, yielding a heat-sealing coating.

[0157] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0158] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 8 m / min, and the coating amount is controlled at 10 g / m. 2 The oven temperature is controlled at 60℃, the hot press roller temperature is controlled at 100℃, and the hot press roller pressure is controlled at 0.5MPa, finally obtaining a fluorinated composite membrane for ventilated clothing.

[0159] Comparative Example 1

[0160] 1 kg of ETFE resin with a melt index of 10 g / 10 min was added to an extruder. The temperature was controlled at 280℃ and the screw speed was controlled at 50 rpm / min. The preform was cooled, stretched, and wound to obtain a fluoropolymer film, which is the sample of Comparative Example 1.

[0161] Comparative Example 2

[0162] (1) Preparation of outer protective layer:

[0163] 1 kg of ETFE resin with a melt index of 10 g / 10 min is added to an extruder. The temperature is controlled at 280℃ and the screw speed is controlled at 50 rpm / min. The preform is cooled, stretched, and wound to obtain a fluoropolymer film.

[0164] (2) Preparation of heat-sealing layer

[0165] 100 parts of PVDF resin with a melt index of 15 g / 10 min were added to a reactor and stirred at 500 rpm / min for 4 hours until homogeneous to obtain a heat-sealing coating.

[0166] (3) Preparation of fluorinated composite membrane for ventilated clothing

[0167] A dry coating machine is used to apply the heat-sealing coating to the surface of the outer protective layer. The unwinding speed is 5 m / min, and the coating amount is controlled at 20 g / m. 2 The oven temperature was controlled at 80℃, the hot press roller temperature was controlled at 120℃, and the hot press roller pressure was controlled at 1MPa. Finally, the comparative example 2 sample was obtained.

[0168] Comparative Example 3

[0169] Similar to Example 2, except that the PMMA resin in Example 2 is replaced with HPPE resin.

[0170] The performance of the fluorinated composite membranes for ventilated clothing prepared in Examples 1-5 and Comparative Examples 1-3 was tested, and the test results are shown in Table 1.

[0171] Table 1 Performance test results of fluorinated composite membranes for ventilated clothing

[0172]

[0173] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A fluorinated composite membrane for tritium-proof and ventilated clothing, characterized in that, It consists of an outer protective layer and a heat-sealing layer; The outer protective layer is a fluorinated resin film; The heat-sealing layer comprises, by weight, the following components: PVDF resin: 40-60 parts; PMMA resin: 20-40 parts; Bisphenol A type polyetheretherketone resin: 5-10 parts; Tackifier: 5-10 parts; Silica: 3-5 parts; Antioxidant: 1-2 parts; Solvent: 400-900 parts; The fluorinated resin in the fluorinated resin membrane is selected from one or more of ETFE, ECTFE, and PCTFE.

2. The fluorinated composite membrane for tritium-proof and ventilated clothing according to claim 1, characterized in that, The melt index of the fluorinated resin in the fluorinated resin film is selected from 10-25 g / 10min; The melt flow index of the PVDF resin is selected from 15-25 g / 10min; The melt flow index of the PMMA resin is selected from 5-10 g / 10min; The melt index of the bisphenol A type polyether ether ketone resin is 10-20 g / 10min.

3. The fluorinated composite membrane for tritium-proof and ventilated clothing according to claim 1, characterized in that, The tackifier is selected from one or more of rosin resin, terpene resin, and petroleum resin; The antioxidant is selected from one or more of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, dilaurate thiodipropionate, and tris(2,4-di-tert-butyl)phosphite. The solvent is selected from N,N-dimethylacetamide or N,N-dimethylformamide; The particle size of the silica is 20-40 nm; The specific surface area of ​​the silicon dioxide is 150-300 m². 2 / g.

4. The fluorinated composite membrane for tritium-proof and ventilated clothing according to any one of claims 1-3, characterized in that, The heat-sealing layer comprises, by weight, the following components: PVDF resin: 60 parts; PMMA resin: 20 parts; Bisphenol A type polyetheretherketone resin: 5 parts; Rosin resin: 10 parts; Silica: 3 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts; N,N-Dimethylacetamide: 400 parts.

5. The fluorinated composite membrane for tritium-proof and ventilated clothing according to any one of claims 1-3, characterized in that, The heat-sealing layer comprises, by weight, the following components: PVDF resin: 50 parts; PMMA resin: 30 parts; Bisphenol A type polyetheretherketone resin: 7.5 parts; Rosin resin: 7.5 parts; Silica: 4 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts; N,N-Dimethylacetamide: 650 parts.

6. The fluorinated composite membrane for tritium-proof and ventilated clothing according to any one of claims 1-3, characterized in that, The heat-sealing layer comprises, by weight, the following components: PVDF resin: 40 parts; PMMA resin: 40 parts; Bisphenol A type polyetheretherketone resin: 10 parts; Rosin resin: 5 parts; Silica: 5 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts; N,N-Dimethylacetamide: 400 parts.

7. The fluorinated composite membrane for tritium-proof and ventilated clothing according to any one of claims 1-3, characterized in that, The heat-sealing layer comprises, by weight, the following components: PVDF resin: 60 parts; PMMA resin: 20 parts; Bisphenol A type polyetheretherketone resin: 5 parts; Terpene resin: 10 parts; Silica: 3 parts; Dilauryl thiodipropionate: 2 parts; N,N-Dimethylformamide: 900 parts.

8. The fluorinated composite membrane for tritium-proof and ventilated clothing according to any one of claims 1-3, characterized in that, The heat-sealing layer comprises, by weight, the following components: PVDF resin: 60 parts; PMMA resin: 20 parts; Bisphenol A type polyetheretherketone resin: 5 parts; Petroleum resin: 10 parts; Silica: 3 parts; Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts; N,N-Dimethylformamide: 900 parts.

9. A method for preparing a fluorinated composite membrane for a tritium-proof, ventilated clothing as described in claim 1, characterized in that, The preparation methods include the following: 1) Fluorine-containing resin is extruded, cast, and corona-treated to obtain a fluorine-containing resin film as an outer protective layer; 2) Mix PVDF resin, PMMA resin, bisphenol A type polyether ether ketone resin, tackifier, silica, antioxidant and solvent, and then coat the mixture onto the surface of the outer protective layer obtained in step 1) to obtain a fluorinated composite film for tritium-proof ventilation clothing.

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