Polyethylene fiberboard surface protection structure

Abstract

The utility model discloses a polyethylene fiberboard surface protection structure, and belongs to the technical field of armored vehicle protection and the technical field of human body protection. The polyethylene fiberboard surface protection structure is composed of a polyethylene fiberboard, a thermosetting composite material thin plate and a surface coating. A layer of thermosetting composite material thin plate is used as a transition layer between the PE fiberboard and the surface protection layer, and a traditional structure without a transition layer or adopting an adhesive film and fiber cloth for transition between the PE fiberboard and the surface protection layer is replaced. The thermosetting composite sheet has certain rigidity, so that the problem that a surface protection layer of the PE fiberboard bulges in the surface paint film spraying process can be avoided; meanwhile, the bonding force with the surface protection layer is higher, the bonding quality is better, the protection effect of the surface protection layer can be better played, aging and external force damage are reduced, the use performance is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of armored vehicle protection technology and human body protection, and specifically relates to a polyethylene fiberboard that can be used alone or in combination with a base deck as a bulletproof armor to achieve bulletproof technical indicators. Background Art

[0002] PE fiberboard is a fiber-reinforced composite material made by heating and pressurizing multiple layers of ultra-high molecular weight polyethylene (UD) fiber cloth. Its excellent ballistic resistance makes it a widely used material in body armor, serving as the primary material for body armor. However, due to its poor interlayer bonding, PE fiberboard is prone to delamination and cracking over time, reducing its protective performance. Furthermore, PE fiberboard has low bonding strength with other materials, making bonding difficult. These factors limit its application in armored vehicle external armor plates.

[0003] To improve the environmental adaptability of PE fiberboard and its resistance to external forces such as sand and gravel impact during external use, it is necessary to protect the PE fiberboard and enhance its suitability for vehicle installation. One feasible method is to spray-coat the surface with a polyurea elastomer. However, since military vehicles are often coated with various camouflage coatings, unlike bulletproof inserts used for personal protection, external PE fiberboard requires a camouflage coating after the polyurea elastomer protective layer to achieve stealth and a uniform finish. However, during the post-coating heating and drying process, surface bulging often occurs, seriously affecting the product's appearance. Therefore, improvements are needed to improve the surface protection structure of PE fiberboard to enhance its environmental adaptability and processability. By spraying a thick protective layer with high tensile and tear strength on the PE fiberboard surface, the delamination, cracking, and light aging of the PE fiberboard under long-term use can be reduced due to temperature, humidity, and stress, thereby extending its service life. The surface protective layer also protects the PE fiberboard from external forces such as sand and gravel impact, human trampling, and minor bumps, thereby enhancing its performance.

[0004] However, after the polyethylene fiberboard is directly sprayed with the surface coating, the protective layer is prone to bulging due to the low bonding strength of the surface coating and poor rigidity of the protective layer during the subsequent camouflage topcoat spraying process and the heating and pressurizing bonding process with other parts. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a polyethylene fiberboard surface protection structure, which consists of a polyethylene fiberboard, a thermosetting composite material sheet, and a surface protection layer, wherein the thermosetting composite material sheet is located between the polyethylene fiberboard and the surface protection layer.

[0006] The thermosetting composite sheet can be a rigid composite sheet such as epoxy glass fiber board or phenolic glass fiber board. The thickness of the thermosetting composite sheet is 0.1 mm to 0.5 mm. The thermosetting composite sheet is bonded to the PE fiberboard using a thermoplastic adhesive film, which is heated and pressurized. The rigidity of the thermosetting composite sheet prevents bulging of the surface protective layer of the PE fiberboard during the surface paint spraying process. Furthermore, the sheet exhibits a higher bonding strength with the surface protective layer, resulting in a better bonding quality.

[0007] The surface protection layer can be a spray coating such as polyurea elastomer, polyurethane elastomer, etc. that can be used for surface protection, with a thickness of 0.5 to 2 mm.

[0008] Compared with the existing structure, the utility model has the following beneficial effects:

[0009] A layer of thermosetting composite material sheet is used as a transition layer between the PE fiberboard and the surface protection layer, replacing the traditional structure without a transition layer or using a film or fiber cloth as the transition layer.

[0010] The present invention first bonds a layer of thermosetting composite sheet to the surface of the PE fiberboard as a transition between the PE fiberboard and the surface protective layer. Relying on the rigidity of the thermosetting composite sheet, the problem of bulging of the surface protective layer during the surface paint spraying process of the PE fiberboard can be solved, thereby improving the processability. The thermosetting composite sheet has a higher bonding strength with the surface protective layer, and the bonding quality is more stable, which can fully exert the role of the surface protective layer. The surface protective layer and the thermosetting composite sheet protect the polyethylene fiberboard, which can reduce the delamination, cracking, and light aging of the polyethylene fiberboard under the influence of temperature, humidity, and stress during long-term use, thereby increasing its service life. At the same time, the polyethylene board is protected from damage caused by external forces such as sand and gravel impacts, people stepping on it, and minor bumps, thereby improving its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the surface protection structure of polyethylene fiberboard

[0012] In the figure, 1 is a polyethylene fiberboard, 2 is a thermosetting composite material sheet, and 3 is a surface protective layer. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] The basic idea of ​​the present invention is to use a layer of thermosetting composite material sheet as a transition layer between the PE fiberboard and the surface protective layer, replacing the traditional structure without a transition layer or using a film or fiber cloth to transition between the two. Thermosetting composite materials have a certain rigidity, which can solve the problem of bulging of the surface protective layer caused by thermal deformation, thermal expansion differences and air expansion inside the internal PE fiberboard during the surface paint spraying process of the PE fiberboard; at the same time, the thermosetting composite material sheet has a higher bonding force with the surface protective layer, and the bonding quality is better, which can better play the protective role of the surface protective layer. The structure proposed by the present invention has better environmental adaptability, which can reduce the delamination and cracking problems of the polyethylene fiberboard under temperature, humidity and stress during long-term use, and the light aging problem, thereby increasing the service life of the polyethylene board; at the same time, the surface protective layer protects the polyethylene board from damage caused by external forces such as sand and gravel impact, people stepping on it, and minor bumps, thereby improving its performance and service life.

[0015] Example 1

[0016] Refer to the attached Figure 1 The polyethylene fiberboard surface protection structure of this embodiment includes a PE fiberboard 1, a thermosetting composite sheet 2, and a surface protection layer 3. The PE fiberboard 1 is a composite board with a UD structure made of J200 ultra-high molecular weight polyethylene fiber and a water-based polyurethane adhesive produced by Jiangsu Jiujiujiu Technology Co., Ltd. The thermosetting composite sheet 2 is a 0.3mm thick 3240 insulation board, and the surface protection layer 3 is a JHSW7180 spray-coated polyurea elastomer.

[0017] The polyethylene fiberboard surface protection structure of this embodiment is manufactured according to the PE fiberboard production process. A non-woven cloth is first produced and then pressed into a board using a flat-plate hot press. Then, a layer of 3240 insulation board, a layer of thermoplastic film, a layer of PE fiberboard, a layer of thermoplastic film, and a layer of 3240 insulation board are laid in order from bottom to top. The laid board is hot-pressed using a flat-plate hot press at a molding temperature generally between 100°C and 110°C. The pressed board is then cut to the required size. Finally, a polyurea sprayer is used to spray the cut board with a polyurea elastomer as a whole according to the required thickness for wrapping and protection.

Claims

1. A polyethylene fiberboard surface protection structure, characterized by: The invention comprises a polyethylene fiber board (1), a thermosetting composite material sheet (2), and a surface protection layer (3), wherein the thermosetting composite material sheet (2) is located between the polyethylene fiber board (1) and the surface protection layer (3).

2. The polyethylene fiberboard surface protection structure according to claim 1, characterized in that: The thermosetting composite material sheet (2) is an epoxy glass fiber board or a phenolic glass fiber board.

3. The polyethylene fiberboard surface protection structure according to claim 1 or 2, characterized in that: The thickness of the thermosetting composite material sheet (2) is 0.1 mm to 0.5 mm.

4. The polyethylene fiberboard surface protection structure according to claim 1, characterized in that: The surface protection layer (3) is a spray coating of polyurea elastomer or polyurethane elastomer.

5. The polyethylene fiberboard surface protection structure according to claim 1 or 4, characterized in that: The surface protection layer (3) has a thickness of 0.5 to 2 mm.

Images