Modified polyester film for tritium-proof ventilation air clothing and preparation method thereof

Abstract

This invention discloses a modified polyester film for tritium-proof ventilated clothing and its preparation method, belonging to the technical field of functional protective clothing. The modified polyester resin for tritium-proof ventilated clothing comprises, by weight, the following components: TPEE resin: 50-70 parts, PVDF resin: 10-20 parts, EBA resin: 20-30 parts, antioxidant: 1-2 parts, and sensitizer: 1-2 parts. The three resins in the modified polyester resin for tritium-proof ventilated clothing have a synergistic effect. Preparing it into a modified polyester film for tritium-proof ventilated clothing significantly improves the tritium permeability, abrasion resistance, and low-temperature heat-sealing properties of the modified polyester film. Furthermore, it can be heat-sealed and then modified with low-dose radiation to enhance the mechanical properties and heat-sealing strength of the tritium-proof ventilated clothing.

Description

Technical Field

[0001] This invention relates to the technical field of functional protective clothing, and more particularly to a modified polyester film 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 is of significant practical importance 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 modified polyester film for tritium-proof ventilation clothing and a method for preparing the same. The modified polyester film for tritium-proof ventilation clothing has the advantages of low tritium permeability, high abrasion resistance, low-temperature heat-sealing properties, and the ability to be heat-sealed and then modified with low-dose radiation for enhancement.

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

[0006] This invention provides a modified polyester resin for tritium-proof and ventilated airsuits, comprising the following components by weight:

[0007] TPEE resin: 50-70 parts;

[0008] PVDF resin: 10-20 parts;

[0009] EBA resin: 20-30 parts;

[0010] Antioxidant: 1-2 parts;

[0011] Sensitizer: 1-2 parts.

[0012] The modified polyester resin used in the above-mentioned tritium-proof and ventilated clothing incorporates PVDF resin and EBA resin into the polyester resin-TPEE resin.

[0013] This invention improves the tritium protection performance of modified polyester resin for tritium-proof and ventilated clothing by introducing PVDF resin, and improves the heat-sealing performance of modified polyester resin for tritium-proof and ventilated clothing by introducing EBA resin.

[0014] In addition, the addition of sensitizer can realize the post-irradiation transfer characteristics of the modified polyester resin for tritium-proof ventilation clothing, and improve the mechanical properties and heat-sealing strength of the modified polyester resin for tritium-proof ventilation clothing.

[0015] Furthermore, the TPEE resin, PVDF resin, and EBA resin have a synergistic effect, significantly improving the tritium protection, heat-sealing, and mechanical properties of the modified polyester resin for tritium-proof ventilation clothing described in this invention. Preferably, the melt flow index of the TPEE resin is 5-10 g / min. In some specific embodiments of this invention, the melt flow index of the TPEE resin is 5 g / min or 10 g / min.

[0016] Preferably, the melt flow index of the PVDF resin is 10-15 g / min; in some specific embodiments of the present invention, the melt flow index of the PVDF resin is 10 g / min or 15 g / min. Preferably, the melt flow index of the EBA resin is 10-25 g / min. In some specific embodiments of the present invention, the melt flow index of the EBA resin is 10 g / min or 25 g / min.

[0017] 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.

[0018] Preferably, the sensitizer is selected from one or more of triallyl isocyanurate, trimethylolpropane trimethacrylate, and diphenylmethane bismaleimide.

[0019] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing of the present invention comprises, by weight, the following components:

[0020] TPEE resin: 50 parts;

[0021] PVDF resin: 20 parts;

[0022] EBA resin: 20 parts;

[0023] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0024] Triallyl isocyanurate: 2 parts.

[0025] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing comprises, by weight, the following components:

[0026] 50 parts of TPEE resin with a melt flow index of 5 g / min;

[0027] PVDF resin with a melt flow index of 10 g / min: 20 parts;

[0028] EBA resin with a melt flow index of 10 g / min: 20 parts;

[0029] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts;

[0030] Triallyl isocyanurate: 2 parts. More preferably, the modified polyester resin for the tritium-resistant ventilated clothing of the present invention comprises, by weight, the following components:

[0031] TPEE resin: 60 parts;

[0032] PVDF resin: 15 parts;

[0033] EBA resin: 25 parts;

[0034] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts;

[0035] Triallyl isocyanurate: 1.5 parts.

[0036] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing comprises, by weight, the following components:

[0037] TPEE resin with a melt flow index of 5 g / min: 60 parts;

[0038] PVDF resin with a melt flow index of 10 g / min: 15 parts;

[0039] EBA resin with a melt flow index of 10 g / min: 25 parts;

[0040] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts;

[0041] Triallyl isocyanurate: 1.5 parts.

[0042] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing of the present invention comprises, by weight, the following components:

[0043] TPEE resin: 70 parts;

[0044] PVDF resin: 10 parts;

[0045] EBA resin: 30 parts;

[0046] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1 part;

[0047] Triallyl isocyanurate: 1 part.

[0048] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing comprises, by weight, the following components:

[0049] 70 parts of TPEE resin with a melt index of 5 g / min;

[0050] PVDF resin with a melt flow index of 10 g / min: 10 parts;

[0051] EBA resin with a melt flow index of 10 g / min: 30 parts;

[0052] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1 part;

[0053] Triallyl isocyanurate: 1 part.

[0054] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing of the present invention comprises, by weight, the following components:

[0055] TPEE resin: 50 parts;

[0056] PVDF resin: 20 parts;

[0057] EBA resin: 20 parts;

[0058] Dilauryl thiodipropionate: 2 parts;

[0059] Trimethylolpropane trimethacrylate: 2 parts.

[0060] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing comprises, by weight, the following components:

[0061] 50 parts of TPEE resin with a melt index of 10 g / min;

[0062] PVDF resin with a melt flow index of 15 g / min: 20 parts;

[0063] EBA resin with a melt flow index of 25 g / min: 20 parts;

[0064] Dilauryl thiodipropionate: 2 parts;

[0065] Trimethylolpropane trimethacrylate: 2 parts.

[0066] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing of the present invention comprises, by weight, the following components:

[0067] TPEE resin: 50 parts;

[0068] PVDF resin: 20 parts;

[0069] EBA resin: 20 parts;

[0070] Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts;

[0071] Diphenylmethane bismaleimide: 2 parts.

[0072] More preferably, the modified polyester resin for the tritium-proof and ventilated clothing comprises, by weight, the following components:

[0073] 50 parts of TPEE resin with a melt index of 10 g / min;

[0074] PVDF resin with a melt flow index of 15 g / min: 20 parts;

[0075] EBA resin with a melt flow index of 25 g / min: 20 parts;

[0076] Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts;

[0077] Diphenylmethane bismaleimide: 2 parts. This invention also provides a modified polyester film for tritium-proof ventilated clothing, prepared from the above-mentioned modified polyester resin for tritium-proof ventilated clothing via an extrusion casting process;

[0078] Preferably, the thickness of the modified polyester film used in the tritium-proof and ventilated airsuit is 100-150 μm. In some specific embodiments of the present invention, the thickness of the modified polyester film used in the tritium-proof and ventilated airsuit is 100 μm or 150 μm.

[0079] This invention also provides a method for preparing a modified polyester film for tritium-proof and ventilated clothing, comprising the following steps:

[0080] 1) After mixing TPEE resin, PVDF resin, EBA resin, antioxidant, and sensitizer, the mixture is extruded and pelletized to obtain modified polyester resin.

[0081] 2) The modified polyester resin obtained in step 1) is extruded again, then cooled, stretched and wound up to prepare a modified polyester film for tritium-proof and ventilated clothing.

[0082] In the above preparation method, the extrusion temperature in step 1) is preferably 220℃-260℃. In some specific embodiments of the present invention, the extrusion temperature in step 1) is preferably 220℃ or 260℃.

[0083] The screw speed for extrusion in step 1) is preferably 40-60 rpm / min. In some specific embodiments of the present invention, the screw speed for extrusion in step 1) is preferably 40 rpm / min or 60 rpm / min.

[0084] The extrusion feeding speed in step 1) is preferably 20-40 rpm / min. In some specific embodiments of the present invention, the extrusion feeding speed in step 1) is preferably 20 rpm / min or 40 rpm / min.

[0085] In the above preparation method, the re-extrusion temperature in step 2) is preferably 220℃-260℃. In some specific embodiments of the present invention, the re-extrusion temperature in step 2) is preferably 220℃ or 260℃.

[0086] The screw speed for the second extrusion in step 2) is preferably 30-50 rpm / min. In some specific embodiments of the present invention, the screw speed for the second extrusion in step 2) is preferably 30 or 50 rpm / min.

[0087] The cooling temperature in step 2) is preferably 20°C-30°C. In some specific embodiments of the present invention, the screw speed for the second extrusion in step 2) is preferably 20°C or 30°C.

[0088] The traction-stretch ratio in step 2) is preferably 1.5-2.5. In some specific embodiments of the present invention, the traction-stretch ratio in step 2) is preferably 1.5 or 2.5.

[0089] Compared with the prior art, the modified polyester resin for tritium-proof ventilation clothing provided by the present invention comprises the following components by weight: TPEE resin: 50-70 parts, PVDF resin: 10-20 parts, EBA resin: 20-30 parts, antioxidant: 1-2 parts, and sensitizer: 1-2 parts. The three resins in the modified polyester resin for tritium-proof ventilation clothing have a synergistic effect. When prepared into a modified polyester film for tritium-proof ventilation clothing, it can significantly improve the tritium permeability, abrasion resistance, and low-temperature heat-sealing properties of the modified polyester film. Furthermore, it can be heat-sealed and then modified with low-dose radiation to enhance the mechanical properties and heat-sealing strength of the tritium-proof ventilation clothing. Detailed Implementation

[0090] To further illustrate the present invention, the modified polyester film for tritium-proof and ventilated clothing and its preparation method provided by the present invention will be described in detail below with reference to embodiments.

[0091] Example 1

[0092] (1) Preparation of modified polyester resin:

[0093] 50 parts of TPEE resin with a melt index of 5 g / min, 20 parts of PVDF resin with a melt index of 10 g / min, 20 parts of EBA resin with a melt index of 10 g / min, 2 parts of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 2 parts of triallyl isocyanurate were prepared. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 260℃, the screw speed controlled at 60 rpm / min, and the feeding rate controlled at 40 rpm / min. After extrusion and pelletizing, modified polyester resin was obtained.

[0094] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 260℃, the screw speed was controlled at 50 rpm / min, the film preform was cooled (temperature controlled at 30℃), stretched (traction stretch ratio 1.5), and wound up to obtain a 150 μm film.

[0095] Example 2

[0096] (1) Preparation of modified polyester resin:

[0097] 60 parts of TPEE resin with a melt index of 5 g / min, 15 parts of PVDF resin with a melt index of 10 g / min, 25 parts of EBA resin with a melt index of 10 g / min, 1.5 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1.5 parts of triallyl isocyanurate were prepared. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 260℃, the screw speed controlled at 60 rpm / min, and the feeding rate controlled at 40 rpm / min. After extrusion and pelletizing, the modified polyester resin was obtained.

[0098] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 260℃, the screw speed was controlled at 50 rpm / min, the film preform was cooled (temperature controlled at 30℃), stretched (traction stretch ratio 1.5), and wound up to obtain a 150 μm film.

[0099] Example 3

[0100] (1) Preparation of modified polyester resin:

[0101] 70 parts of TPEE resin with a melt index of 5 g / min, 10 parts of PVDF resin with a melt index of 10 g / min, 30 parts of EBA resin with a melt index of 10 g / min, 1 part of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1 part of triallyl isocyanurate were prepared. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 260℃, the screw speed controlled at 60 rpm / min, and the feeding rate controlled at 40 rpm / min. The modified polyester resin was obtained after extrusion and pelletizing.

[0102] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 260℃, the screw speed was controlled at 50 rpm / min, the film preform was cooled (temperature controlled at 30℃), stretched (traction stretch ratio 1.5), and wound up to obtain a 150 μm film.

[0103] Example 4

[0104] (1) Preparation of modified polyester resin:

[0105] 50 parts of TPEE resin with a melt index of 10 g / min, 20 parts of PVDF resin with a melt index of 15 g / min, 20 parts of EBA resin with a melt index of 25 g / min, 2 parts of dilauryl thiodipropionate, and 2 parts of trimethylolpropane trimethacrylate were used. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 220℃, the screw speed controlled at 40 rpm / min, and the feeding rate controlled at 20 rpm / min. After extrusion and pelletizing, modified polyester resin was obtained.

[0106] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 220℃, the screw speed was controlled at 30 rpm / min, the film preform was cooled (temperature controlled at 20℃), stretched (traction stretch ratio 2.5), and wound up to obtain a 100 μm film.

[0107] Example 5

[0108] (1) Preparation of modified polyester resin:

[0109] 50 parts of TPEE resin with a melt index of 10 g / min, 20 parts of PVDF resin with a melt index of 15 g / min, 20 parts of EBA resin with a melt index of 25 g / min, 2 parts of tris(2,4-di-tert-butyl) phosphite, and 2 parts of diphenylmethane bismaleimide were prepared. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 220℃, the screw speed controlled at 40 rpm / min, and the feeding rate controlled at 20 rpm / min. After extrusion and pelletizing, modified polyester resin was obtained.

[0110] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 220℃, the screw speed was controlled at 30 rpm / min, the film preform was cooled (temperature controlled at 20℃), stretched (traction stretch ratio 2.5), and wound up to obtain a 100 μm film.

[0111] Comparative Example 1

[0112] (1) Preparation of modified polyester resin:

[0113] 50 parts of TPEE resin with a melt index of 5 g / min, 20 parts of PVDF resin with a melt index of 10 g / min, 20 parts of EBA resin with a melt index of 10 g / min, and 2 parts of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate were used. 1 kg of the raw materials were added to an extruder, with the temperature controlled at 260℃, the screw speed controlled at 60 rpm / min, and the feeding rate controlled at 40 rpm / min. After extrusion and pelletizing, modified polyester resin was obtained.

[0114] (2) Preparation of modified polyester film: 1 kg of modified polyester resin was added to the extruder, the temperature was controlled at 260℃, the screw speed was controlled at 50 rpm / min, the film preform was cooled (temperature controlled at 30℃), stretched (traction stretch ratio 1.5), and wound up to obtain a 150 μm film.

[0115] Comparative Example 2

[0116] 1 kg of TPEE resin with a melt index of 5 g / min was added to the extruder. The temperature was controlled at 260℃ and the screw speed was controlled at 50 rpm / min. The preform was cooled (temperature controlled at 30℃), stretched (traction stretch ratio 1.5), and wound up to obtain a 150 μm film.

[0117] Comparative Example 3

[0118] Replace the PVDF resin in Example 1 with HDPE resin, keeping everything else the same.

[0119] Comparative Example 4

[0120] Replace the EBA resin in Example 1 with HDPE resin, and keep everything else the same.

[0121] The properties of the modified polyester films prepared in Examples 1-5 and Comparative Examples 1-4 were tested, and the test results are shown in Table 1.

[0122] Table 1. Performance test results of modified polyester film

[0123]

[0124]

[0125] Note: All the above test samples were tested after being irradiated with a dose of 30 kGy.

[0126] 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 modified polyester resin for tritium-proof and ventilated clothing, characterized in that, By weight, it includes the following ingredients: TPEE resin: 50-70 parts; PVDF resin: 10-20 parts; EBA resin: 20-30 parts; Antioxidant: 1-2 parts; Sensitizer: 1-2 parts; The melt flow index of the TPEE resin is 5-10 g / min; The melt flow index of the PVDF resin is 10-15 g / min; The melt flow index of the EBA resin is 10-25 g / min; 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 sensitizer is selected from one or more of triallyl isocyanurate, trimethylolpropane trimethacrylate, and diphenylmethane bismaleimide.

2. The modified polyester resin for tritium-proof and ventilated clothing according to claim 1, characterized in that, The modified polyester resin used in the tritium-proof and ventilated clothing comprises the following components by weight: TPEE resin: 50 parts; PVDF resin: 20 parts; EBA resin: 20 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 2 parts; Triallyl isocyanurate: 2 parts.

3. The modified polyester resin for tritium-proof and ventilated clothing according to claim 1, characterized in that, The modified polyester resin used in the tritium-proof and ventilated clothing comprises the following components by weight: TPEE resin: 60 parts; PVDF resin: 15 parts; EBA resin: 25 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1.5 parts; Triallyl isocyanurate: 1.5 parts.

4. The modified polyester resin for tritium-proof and ventilated clothing according to claim 1, characterized in that, The modified polyester resin used in the tritium-proof and ventilated clothing comprises the following components by weight: TPEE resin: 70 parts; PVDF resin: 10 parts; EBA resin: 30 parts; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: 1 part; Triallyl isocyanurate: 1 part.

5. The modified polyester resin for tritium-proof and ventilated airsuit according to claim 1, characterized in that, The modified polyester resin used in the tritium-proof and ventilated clothing comprises the following components by weight: TPEE resin: 50 parts; PVDF resin: 20 parts; EBA resin: 20 parts; Dilauryl thiodipropionate: 2 parts; Trimethylolpropane trimethacrylate: 2 parts.

6. The modified polyester resin for tritium-proof and ventilated clothing according to claim 1, characterized in that, The modified polyester resin used in the tritium-proof and ventilated clothing comprises the following components by weight: TPEE resin: 50 parts; PVDF resin: 20 parts; EBA resin: 20 parts; Tris(2,4-di-tert-butyl)phenyl phosphite: 2 parts; Diphenylmethane bismaleimide: 2 parts.

7. A modified polyester film for tritium-proof and breathable clothing, characterized in that, It is prepared by extrusion casting process from the modified polyester resin for tritium-proof and ventilated clothing as described in any one of claims 1-6; The modified polyester film used in the tritium-proof and ventilated clothing has a thickness of 100-150 μm.

8. The method for preparing the modified polyester film for tritium-proof and ventilated clothing according to claim 7, characterized in that, Includes the following steps: 1) After mixing TPEE resin, PVDF resin, EBA resin, antioxidant, and sensitizer, the mixture is extruded and pelletized to obtain modified polyester resin. 2) The modified polyester resin obtained in step 1) is extruded again, then cooled, stretched and wound up to prepare a modified polyester film for tritium-proof and ventilated clothing.

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