High-temperature-resistant bulletproof plate and preparation method thereof

Abstract

The invention belongs to the technical field of bulletproof plates, and particularly relates to a high-temperature-resistant bulletproof plate and a preparation method thereof.The preparation method comprises the following steps that high-temperature-resistant ultra-high molecular weight polyethylene non-woven cloth and polyimide films are stacked at intervals, and a composite material is obtained; the composite material is wrapped with woven cloth, a hot melt adhesive film is arranged between the composite material and the woven cloth, and then the composite material and the woven cloth are put into a mold; sequentially heating, pressurizing and finally cooling to obtain the high-temperature-resistant bulletproof plate. The graphene is added into the ultra-high molecular weight polyethylene fiber, the bulletproof plate is prepared in a heating mode, in addition, the surface of the bulletproof plate is coated with a layer of heat insulation coating, the heat insulation performance of the ultra-high molecular weight polyethylene fiber is remarkably improved, the performance can be kept in the high-temperature environment of 100-110 DEG C, and the bulletproof plate has the good heat insulation performance. The ultra-high molecular weight polyethylene bulletproof plate can be applied to positions such as automobile engines and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of bulletproof plates, and in particular relates to a high temperature resistant bulletproof plate and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene (PE) fiber composite material is currently the best fiber bulletproof material with excellent anti-ballistic performance. It has excellent properties such as light weight, low temperature resistance, water resistance, light resistance, and chemical corrosion resistance, and has been widely used in individual protective equipment and vehicle equipment. However, due to the defects of PE fiber that it is not resistant to high temperatures and is not fireproof (the melting point of PE is only about 150°C), PE fiber composite materials need to be equipped with additional fireproof materials when used.

[0003] At present, the fireproof materials used for adding PE fiber composite materials are mainly divided into inorganic and organic materials. For example, fireproof materials based on inorganic kaolin have inherent advantages of high temperature resistance and fire resistance, but their density is relatively large, which greatly increases the weight of bulletproof equipment. In some protection fields with high weight requirements, such as helicopters and transport aircraft, their application is limited. In addition, the processing cycle of adding inorganic fireproof materials is very long, generally requiring more than ten days, which also limits their wide application to a certain extent. Organic materials such as aerogels need to be installed with a very thick layer to meet the basic fireproof and high temperature resistance requirements, which greatly increases the thickness of bulletproof equipment and is limited in many application fields. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high temperature resistant bulletproof plate and a preparation method thereof, so as to improve the high temperature resistant effect thereof.

[0005] The embodiment of the present invention provides a method for preparing a high temperature resistant bulletproof plate, comprising the following steps: The high temperature resistant ultra-high molecular weight polyethylene non-woven fabric and the polyimide film are stacked at intervals to obtain a composite material; Wrapping the composite material with a woven fabric, with a hot melt adhesive film disposed between the composite material and the woven fabric, and then placing the composite material in a mold; The temperature is raised, pressurized and finally cooled down in sequence to obtain a high temperature resistant bulletproof plate.

[0006] Preferably, the high temperature resistant ultra-high molecular weight polyethylene non-woven fabric is composed of high temperature resistant ultra-high molecular weight polyethylene fibers and water-based polyurethane, and the high temperature resistant ultra-high molecular weight polyethylene fibers are composed of ultra-high molecular weight polyethylene fibers and graphene.

[0007] Preferably, in the high temperature resistant ultra-high molecular weight polyethylene fiber, the weight ratio of graphene is 3-5%.

[0008] Preferably, the weight of the polyimide film is 200-300 g per square meter.

[0009] Preferably, when stacked at intervals, the layer ratio of the high temperature resistant ultra-high molecular weight polyethylene non-woven fabric to the polyimide film is 15:1.

[0010] Preferably, the woven fabric is aramid woven fabric.

[0011] Preferably, the hot melt adhesive film is a polyolefin hot melt adhesive film, and the weight of the hot melt adhesive film per square meter is 50g.

[0012] Preferably, the steps of heating, pressurizing and finally cooling are: Raise the temperature to 130℃ for 60min; then maintain the pressure at 5Mpa for 10min; increase the pressure to 12Mpa for 10min; increase the pressure to 18Mpa for 10min; increase the pressure to 24Mpa for 40min; cool down and complete when the temperature drops to 30℃.

[0013] Preferably, the method further comprises the following steps: after cooling, applying a heat-insulating coating on the outer surface of the woven fabric, drying the coating, and placing the coating at 60° C. to stand; The thermal insulation coating comprises the following components in percentage by weight: 40-41% BaSO4 / ZrO2 powder, 0.2-0.4% wetting agent, 0.2-0.4% leveling agent, 15-16% pure acrylic emulsion or styrene acrylic emulsion, 0.2-0.4% water-based non-silicon defoamer, 0.6-0.8% dodecyl alcohol ester, and 41-43% water; The preparation method is as follows: BaSO4 / ZrO2 powder, water and a wetting agent are mixed evenly; then pure acrylic emulsion or styrene acrylic emulsion is added and mixed evenly; then dodecyl alcohol ester, a leveling agent and a water-based non-silicon defoaming agent are added, mixed evenly, and degassed to obtain a thermal insulation coating.

[0014] The embodiment of the present invention provides a high temperature resistant bulletproof plate, which is prepared by adopting the preparation method.

[0015] The beneficial effect of the present invention is that graphene is added to the ultra-high molecular weight polyethylene fiber, and a bulletproof plate is prepared by heating. In addition, a layer of heat-insulating coating is applied on the surface of the bulletproof plate, which significantly improves the heat-insulating performance of the ultra-high molecular weight polyethylene fiber. The performance can be maintained in a high temperature environment of 100-110°C, which exceeds the upper limit of the use environment of conventional ultra-high molecular weight polyethylene bulletproof plates, and can be used in automobile engines and other locations. DETAILED DESCRIPTION

[0016] Example 1 A method for preparing a high temperature resistant bulletproof plate comprises the following steps: 1. Cutting the overlay 1. Spread the high temperature resistant ultra-high molecular weight polyethylene non-woven fabric on the workbench. The fabric should be spread flat, with each layer overlapping. The number of layers should be determined by the surface density. Use the special version software for clothing design to automatically layout and cut according to the production requirements.

[0017] The high temperature resistant ultra-high molecular weight polyethylene non-woven fabric is composed of high temperature resistant ultra-high molecular weight polyethylene fibers and water-based polyurethane, and the weight ratio of the high temperature resistant ultra-high molecular weight polyethylene fibers to the water-based polyurethane is 2:1.

[0018] High temperature resistant ultra-high molecular weight polyethylene fiber contains 4% graphene.

[0019] Cut the PI (polyimide) film according to the drawing. The weight of each square meter of PI film is 200-300g.

[0020] The high temperature resistant ultra-high molecular weight polyethylene non-woven fabric and PI film are stacked in layers at a ratio of 15:1 and then transported to the weight balancing room for weight balancing.

[0021] 2. Suppression 1. Lay the cut composite material neatly and flatly, wrap it with heterocyclic aramid woven fabric, place a hot melt adhesive film between the woven fabric and the material, and the weight of the hot melt adhesive film per square meter is 50g, and the hot melt adhesive film is a polyolefin hot melt adhesive film; 2. Place the prepared material into the embedded mold, centered on all four sides; 3. It takes 60 minutes for the mold to heat up to 130°C, and the press is deadweight; 4. When the temperature reaches 130°C, maintain the pressure at 5Mpa for 10 minutes; 5. Increase the pressure to 12Mpa for 10 minutes; 6. Increase the pressure to 18Mpa for 10 minutes; 7. Increase the pressure to 24Mpa for 40 minutes; 8. Maintain the pressure at 24Mpa to cool down. When the temperature drops to 30℃, release the pressure and take out the plate.

[0022] 3. Coating Heat-insulating coating is applied to the outer surface of the wrapped material (that is, the outer surface of the aramid woven fabric), and after drying at room temperature, it is placed in an environment at a temperature of 60°C for 4 days to finally obtain a high-temperature resistant bulletproof plate.

[0023] The preparation method of the thermal insulation coating comprises the following steps: 1. Preparation of BaSO4 / ZrO2 powder Weigh a certain mass of BaSO4 powder and ZrO2 powder into a beaker (the weight ratio of BaSO4 and ZrO2 is 9:1), add a certain volume of deionized water and stir for 65 minutes (speed is 850r / min), filter, dry and grind, calcine the powder at 400℃ for 4 hours, ball mill the calcined powder for 60 minutes to obtain BaSO4 / ZrO2 powder.

[0024] 2. Preparation of thermal insulation coating Weigh a certain mass of BaSO4 / ZrO2 powder into a beaker, add a certain volume of deionized water and a certain mass of wetting agent, stir evenly, and ultrasonically oscillate for 10 minutes to disperse evenly; add a certain mass of pure acrylic emulsion, ultrasonically oscillate for 5 minutes, then add a certain mass of dodecyl alcohol ester, a certain mass of leveling agent and a certain mass of defoaming agent, ultrasonically oscillate for 5 minutes, deaerate it, and obtain a thermal insulation coating.

[0025] The composition of each raw material is shown in Table 1.

[0026] Table 1 Mass ratio of each raw material

[0027] The thermal insulation coating was brushed on the titanium plate, dried at room temperature and then placed in an oven (65°C) for curing for 4 days to obtain a thermal insulation coating with a coating thickness of 300 μm.

[0028] The performance of the thermal insulation coating obtained in Example 1 was measured. The solar reflectance, near-infrared reflectance and hemispherical emissivity of the thermal insulation coating were 0.829, 0.775 and 0.93 respectively. The thermal insulation temperature difference reached 13.21°C, which was 4.29°C higher than that of the thermal insulation coating obtained by the conventional method. The thermal insulation coating prepared by this method has good thermal insulation and cooling effect.

[0029] The high temperature resistant bulletproof plate prepared by the invention can maintain performance in a high temperature environment of 100-110°C, which exceeds the upper limit of the use environment of conventional ultra-high molecular weight polyethylene bulletproof plates, and can be used in automobile engines and other locations.

[0030] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0031] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a high temperature resistant bulletproof plate, characterized in that: The following steps are included: The high temperature resistant ultra-high molecular weight polyethylene non-woven fabric and the polyimide film are stacked at intervals to obtain a composite material; Wrapping the composite material with a woven fabric, with a hot melt adhesive film disposed between the composite material and the woven fabric, and then placing the composite material in a mold; The temperature is raised, pressurized and finally cooled in sequence to obtain a high temperature resistant bulletproof plate.

2. The preparation method according to claim 1, characterized in that: The high temperature resistant ultra-high molecular weight polyethylene non-woven fabric is composed of high temperature resistant ultra-high molecular weight polyethylene fibers and water-based polyurethane, and the high temperature resistant ultra-high molecular weight polyethylene fibers are composed of ultra-high molecular weight polyethylene fibers and graphene.

3. The preparation method according to claim 2, characterized in that: In the high temperature resistant ultra-high molecular weight polyethylene fiber, the weight ratio of graphene is 3-5%.

4. The preparation method according to claim 1, characterized in that: The weight of the polyimide film is 200-300 g per square meter.

5. The preparation method according to claim 1, characterized in that: When stacked at intervals, the layer ratio of the high temperature resistant ultra-high molecular weight polyethylene non-woven fabric and the polyimide film is 15:

1.

6. The preparation method according to claim 1, characterized in that: The woven fabric is aramid woven fabric.

7. The preparation method according to claim 1, characterized in that: The hot melt adhesive film is a polyolefin hot melt adhesive film, and the weight of the hot melt adhesive film per square meter is 50g.

8. The preparation method according to claim 1, characterized in that: The steps of heating, pressurizing and finally cooling down are: Raise the temperature to 130℃ for 60min; then maintain the pressure at 5Mpa for 10min; increase the pressure to 12Mpa for 10min; increase the pressure to 18Mpa for 10min; increase the pressure to 24Mpa for 40min; cool down and complete when the temperature drops to 30℃.

9. The preparation method according to claim 1, characterized in that: The method further comprises the following steps: after cooling, applying a heat-insulating coating to the outer surface of the woven fabric, drying the coating, and placing the coating at 60° C. to stand; The thermal insulation coating comprises the following components in percentage by weight: 40-41% BaSO4 / ZrO2 powder, 0.2-0.4% wetting agent, 0.2-0.4% leveling agent, 15-16% pure acrylic emulsion or styrene acrylic emulsion, 0.2-0.4% water-based non-silicon defoamer, 0.6-0.8% dodecyl alcohol ester, and 41-43% water; The preparation method is as follows: BaSO4 / ZrO2 powder, water and a wetting agent are mixed evenly; then pure acrylic emulsion or styrene acrylic emulsion is added and mixed evenly; then dodecyl alcohol ester, a leveling agent and a water-based non-silicon defoaming agent are added, mixed evenly, and degassed to obtain a thermal insulation coating.

10. A high temperature resistant bulletproof plate, characterized in that: The preparation is obtained by the preparation method according to any one of claims 1 to 9.

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