Structural design and preparation of integrated light-weight explosion-proof suit

Abstract

The invention is applicable to the technical field of safety protection materials, and provides an explosion-proof suit structure and a preparation method thereof, an explosion-proof material in the explosion-proof suit is a high-performance explosion-proof fabric subjected to coating treatment, the explosion-proof suit is composed of an upper garment and trousers, and the upper garment and the trousers are respectively of an integrated explosion-proof fabric structure without splicing seams and lap joints. The explosion-proof suit provides all protection except for the head and neck of a human body, and has the advantages of light weight, softness, simple preparation process and convenience in putting on and taking off.

Description

Technical Field

[0001] The invention relates to the field of special protective devices, and in particular to a method for preparing a high-performance explosion-proof suit and a chip fabric thereof. Background Art

[0002] Explosion-proof clothing is a special protective equipment designed to deal with high-risk environments such as explosions. Its main function is to prevent the damage of explosion shock waves and thermal radiation to personnel. Usually, explosion-proof clothing is made of high-strength, lightweight, heat-resistant flame-retardant materials, such as high-performance fiber aramid, which has good impact resistance and fire resistance, and can effectively protect the safety of personnel. Explosion-proof clothing made of high-performance fibers is usually thicker and heavier because of the special threats it faces. It is inconvenient to wear and will affect the wearer's freedom of movement and comfort. In addition, in the preparation process of explosion-proof clothing, it is usually divided into different modules such as arms, chest, back, legs, etc. for cutting, and then prepared into explosion-proof chips for each module, and finally assembled and spliced ​​into explosion-proof clothing. This form of splicing and assembly is bound to form protection defects (especially at the joints of each module). In summary, improving the explosion-proof performance of explosion-proof materials in explosion-proof clothing and reducing weight, as well as solving the problem of easy wearing have become one of the focuses of attention and research on explosion-proof clothing. Summary of the invention

[0003] In order to further improve the explosion-proof performance of explosion-proof clothing, reduce weight, and improve wearing flexibility, the present invention provides a method for preparing high-performance explosion-proof materials and an explosion-proof clothing structure that is easy to wear. The specific contents are introduced as follows:

[0004] The present invention provides a method for preparing explosion-proof materials in explosion-proof clothing. The explosion-proof material is composed of high-performance fiber explosion-proof fabric treated with a coating. The high-performance fiber is one of aramid, ultra-high molecular weight polyethylene, and polybenzobisoxazole fiber. The fabric is one of non-woven fabric, plain woven fabric, and three-dimensional fabric. In order to improve the explosion-proof performance of the explosion-proof material, the high-performance fiber fabric is further subjected to coating treatment. The coating treatment is to coat the high-performance fiber fabric with a shear thickening liquid and then fix it with a film. The shear thickening liquid is prepared by taking polyurethane resin as a matrix and adding spherical nano-SiO2 and PEG200. The particle size of the spherical nano-SiO2 is 100-400nm, and the addition amount is 0.1%-3.0% (mass fraction). Furthermore, when the addition amount of PEG200 is 10%-50% (mass fraction) and the mass ratio of the shear thickening liquid to the high-performance fiber is 1: (4-20), the explosion-proof material after coating treatment has better explosion-proof performance. In order to better exert the performance of the shear thickening liquid, the anti-explosion material is hot-pressed and fixed on both sides with adhesive film after impregnation. In order to better exert the high-strength performance of the fiber, the adhesive film is further selected to be one of thermoplastic polyurethane, thermosetting EVA, and thermoplastic PP, and the elongation at break of the adhesive film is between 200% and 560%.

[0005] In order to achieve the safety protection of explosion-proof clothing and avoid the protection defects caused by the modular form, the present invention adopts a structural design in which the top and pants are formed in one piece, which effectively avoids the protection defects caused by the modular structure and also gives full play to the performance of the fibers in the overall fabric structure. The characteristic of the one-piece molding is that the explosion-proof material in the top is Figure 1 The trousers are cut from the pattern shown in the figure. The explosion-proof material used in the trousers is Figure 2 The explosion-proof materials are cut by the pattern shown in the figure, and the explosion-proof materials formed have no seams or overlaps. The explosion-proof materials in the top and the explosion-proof materials in the pants together form a human body protection range that covers all torso parts except the neck and head. Each protection part is surrounded and tied with a ribbon. The position and fixation of the ribbon are shown in the figure. Figure 3 and Figure 4 The explosion-proof clothing formed ensures the integrity of the fabric structure, which is conducive to giving full play to the fiber properties and improving the explosion-proof performance.

[0006] Since the explosion-proof fabric in the explosion-proof clothing is made of multiple layers and the overall weight is heavier than that of ordinary clothing, reasonable point fixation can effectively avoid the phenomenon that the tightness of the explosion-proof fabric changes due to weight and thus leads to performance degradation. The present invention sets 8 points, 4 points and five stitches in the explosion-proof material of the top and the explosion-proof material of the pants for fixation, respectively, wherein the shoulder part of the top is fixed with extended points, ensuring that the softness of the explosion-proof clothing is not affected and solving the problem of changes in the tightness of the fabric due to weight.

[0007] The specific steps for preparing explosion-proof clothing are:

[0008] (1) first preparing a shear thickening liquid, then coating the high-performance fiber fabric with the shear thickening liquid by using an impregnation device, and forming a coated high-performance fiber explosion-resistant fabric after drying;

[0009] (2) Cut the explosion-proof fabric after coating, and stack a certain number of layers of explosion-proof fabric for fixing. The fixing position and form are shown in Figure 1 and Figure 2 As shown, the fixing method is to use aramid thread for sewing;

[0010] (3) Based on Figure 3 and Figure 4 Cut the jacket fabric and sew the jacket; the jacket and the multi-layer explosion-proof fabric are fixed with Velcro, and the Velcro position coincides with the fixing point of the explosion-proof fabric. Figure 1 and Figure 2 As shown;

[0011] (4) The fixed multi-layer explosion-proof fabric is placed in the outer jacket, and the Velcro is bonded to form an explosion-proof suit.

[0012] The present invention has obvious advantages in improving explosion-proof performance and convenient wearing, which are specifically manifested as follows:

[0013] (1) The use of shear thickening liquid to treat high-performance fibers to prepare explosion-proof chips can not only improve the explosion-proof performance of explosion-proof clothing, but also further reduce the weight of the explosion-proof chips and improve the convenience of explosion-proof clothing; at the same time, the use of high-elongation adhesive film to fix the two sides of the explosion-proof material after coating treatment ensures the stable existence of the shear thickening liquid, and also enhances the protective performance of the explosion-proof material;

[0014] (2) The explosion-proof materials in the jacket and pants of the explosion-proof suit are cut in an integrated structure, which avoids the lack of protection caused by the assembly of modules, and also reduces the probability of performance not being fully exerted due to fiber interruption, thus providing a guarantee for the all-round protection of the explosion-proof suit;

[0015] (3) Both the top and pants of the explosion-proof suit are formed by a closed-loop webbing pattern. On the one hand, it meets the requirements of the one-piece explosion-proof fabric cutting method. On the other hand, it also improves the convenience of wearing the explosion-proof suit, and can be quickly put on and taken off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the plan view of the explosion-proof material of the top;

[0017] Figure 2 Schematic diagram of the plan view of explosion-proof materials for pants;

[0018] Figure 3 The plan view of the jacket and the schematic diagram after forming;

[0019] Figure 4 Plan view of the trouser jacket and schematic diagram after molding. Specific implementation methods

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The explosion-proof clothing of the present invention is composed of a coat and an explosion-proof material, wherein the explosion-proof material is composed of a high-performance fiber fabric, a shear thickening liquid and a film. The specific implementation steps are as follows:

[0023] (I) High-performance fiber fabric impregnated with shear thickening liquid

[0024] Nano-SiO2 and PEG200 are prepared into a solution in proportion, and the obtained shear thickening liquid is impregnated into a high-performance fiber fabric through an impregnation machine, and the content of the shear thickening liquid in the fabric is controlled by the impregnation speed and pressure; then it is dried to form a shear thickening liquid to coat the high-performance fiber fabric; finally, a roller heating laminating machine is used to composite the adhesive film with the formed coated fabric to form the explosion-proof material in the invention.

[0025] (II) Preparation of explosion-proof chips in explosion-proof clothing

[0026] according to Figure 1 and Figure 2 The schematic diagram of the chip structure of the jacket and pants is cut according to the size. The cutting is based on the roll fabric with a width of more than 2m to ensure the integrity of the jacket and pants chips, that is, the integrity of the chips. Figure 1 and Figure 2 The fixed points shown are sewn and fixed to form the explosion-proof chip of the explosion-proof clothing.

[0027] (III) Preparation of outer jacket

[0028] according to Figure 3 and Figure 4 Cut the jacket and then sew it. The position of the jacket's ribbon is shown in the figure below. Figure 3 and Figure 4 The positions shown are sewn in preparation for surrounding bundling and forming of explosion-proof clothing, and the inner layer of the jacket also has corresponding Velcro positions (whose positions coincide with the fixed points of the chip) in preparation for the combination of the jacket and the chip.

[0029] (IV) Assembly of explosion-proof clothing

[0030] The sewn jacket and the prepared explosion-proof chip are assembled, and the Velcro tapes at various positions are connected correspondingly to form an explosion-proof suit.

Claims

1. An explosion-proof clothing structure, characterized in that: The explosion-proof clothing is composed of a top and trousers, and the top and trousers are composed of explosion-proof materials and a jacket; the explosion-proof materials of the top and trousers are respectively integrally formed without any splicing and seams; the explosion-proof material is composed of a high-performance fiber explosion-proof fabric treated with a coating; the high-performance fiber is one of aramid, ultra-high molecular weight polyethylene, and polybenzobisoxazole fiber; the coating treatment is to coat the high-performance fiber explosion-proof material with a shear thickening liquid and then fix it with a film coating; the fabric is one of a non-woven fabric, a plain woven fabric, and a three-dimensional fabric.

2. According to claim 1, the top and the pants are integrally formed, characterized in that The explosion-proof material in the top is cut using the structure shown in Figure 1, and the explosion-proof material in the pants is cut using the structure shown in Figure 2. The explosion-proof materials formed have no seams or splicing, and the integrity of the fabric structure is conducive to giving full play to the fiber properties and improving the explosion-proof performance.

3. According to claim 2, the explosion-proof material in the top and the explosion-proof material in the pants together form a human body protection range covering all parts of the torso except the neck and head, and each protection part is surrounded and fixed by a webbing. The position and fixation of the webbing are shown in Figures 3 and 4.

4. The shear thickening liquid coating process according to claim 1, characterized in that The shear thickening liquid is prepared by taking polyurethane resin as the matrix, adding spherical nano-SiO2 and PEG200. The particle size of the spherical nano-SiO2 is 100-400nm, and the addition amount is 0.1%-3.0% (mass fraction); the addition amount of PEG200 is 10%-50% (mass fraction).

5. The explosion-proof material according to claim 1, characterized in that The mass ratio of the shear thickening fluid to the high-performance fiber is 1:(4-20).

6. The explosion-proof material according to claim 1, characterized in that The explosion-proof material is fixed by coating with a shear thickening liquid, wherein the film is one of thermoplastic polyurethane, thermosetting EVA, and thermoplastic PP, and the elongation at break of the film is between 200% and 560%, and the tensile strength is greater than 15MPa (the thickness of the film is not greater than 0.1mm).

7. The explosion-proof clothing according to claim 1, wherein the preparation steps are: (1) first preparing a shear thickening liquid, then coating the high-performance fiber fabric with the shear thickening liquid using an impregnation device, and drying to form a coated high-performance fiber explosion-resistant fabric; (2) Cutting the explosion-proof fabric after coating, stacking a certain number of layers of explosion-proof fabric for fixing, wherein the fixing position is shown in FIG. 1 and FIG. 2 , and the fixing method is to sew with aramid thread; (3) Cutting the outer fabric and sewing the outer fabric; wherein the outer fabric is fixed to the multi-layer explosion-proof fabric by means of Velcro, and the Velcro position coincides with the fixing point of the explosion-proof fabric, as shown in FIGS. 1 and 2 ; (4) The fixed multi-layer explosion-proof fabric is placed in the outer jacket, and the Velcro is bonded to form an explosion-proof suit.

8. An explosion-proof clothing structure, characterized in that The explosion-proof clothing jacket is made of flame-retardant fabrics, including but not limited to aramid 1313 fabrics.

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