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CN-121994078-A - Anti-falling curved surface spliced ceramic bulletproof plugboard and preparation method thereof

CN121994078ACN 121994078 ACN121994078 ACN 121994078ACN-121994078-A

Abstract

The invention relates to the field of ceramic bulletproof plugboards, in particular to an anti-falling curved surface spliced ceramic bulletproof plugboard and a preparation method thereof. The anti-falling curved surface spliced ceramic bulletproof plugboard comprises a laminated structure and a polyurea layer coated on the periphery of the laminated structure, wherein the laminated structure comprises an anti-falling layer, a crack stop layer, a ceramic layer, a polyethylene layer and a foam layer with concave foam reduction which are sequentially laminated from an elastic facing surface to an elastic backing surface, the anti-falling layer comprises an aramid honeycomb, a mixture of hollow glass microspheres and silica gel is filled in cells of the aramid honeycomb, and the crack stop layer comprises an aramid woven cloth. The anti-falling layer provided by the invention consists of the aramid fiber honeycomb, the hollow glass microsphere and the silica gel, the structure is bionic, the human bone tissue structure is realized, the aramid fiber honeycomb provides a structural framework, the supporting falling layer does not deform, the hollow glass microsphere has high compression strength, the hollow glass microsphere can resist impact and absorb impact energy through the damage of the microsphere, and the silica gel can provide elasticity besides bonding the aramid fiber honeycomb and the microsphere and recover deformation after impact.

Inventors

  • MIAO YIGAO
  • DING ZHIHONG
  • WANG WENJUN
  • Huang Youshun
  • MEI XIAOHUI

Assignees

  • 浙江领崎科技有限责任公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. The anti-falling curved surface spliced ceramic bulletproof plugboard is characterized by comprising a laminated structure and a polyurea layer coated on the periphery of the laminated structure; The laminated structure comprises a falling-resistant layer, a crack-stopping layer, a ceramic layer, a polyethylene layer and a concave foam reducing layer which are sequentially laminated in the direction from an elastic facing surface to an elastic backing surface; the anti-falling curved surface spliced ceramic bulletproof plugboard is of an arc-shaped structure, wherein in the arc-shaped structure, the convex surface is an elastic facing surface, and the concave surface is a back elastic surface; The anti-falling layer comprises an aramid honeycomb, and the cells of the aramid honeycomb are filled with a mixture of hollow glass microspheres and silica gel; the crack stop layer comprises aramid woven cloth.
  2. 2. The drop-resistant curved splice ceramic ballistic panel of claim 1 wherein the ceramic layer comprises silicon carbide, boron carbide or aluminum oxide; The ceramic layer is formed by bonding and splicing a plurality of hexagonal ceramics, and the length of the hexagonal opposite sides of the hexagonal ceramics is 20-30 mm.
  3. 3. The drop-resistant curved-surface spliced ceramic bulletproof plugboard according to claim 1, wherein the thickness of the ceramic layer is more than or equal to 3mm; the thickness of the crack stop layer is more than or equal to 0.5mm.
  4. 4. The drop-resistant curved-surface spliced ceramic bulletproof plugboard according to claim 1, wherein the thickness of the polyethylene layer is more than or equal to 7mm, and the strength of polyethylene fibers in the polyethylene layer is more than 36cN/dtex.
  5. 5. The drop-resistant curved-surface spliced ceramic bulletproof plugboard according to claim 1, wherein the thickness of the drop-resistant layer is 1-2 mm.
  6. 6. The anti-drop curved surface spliced ceramic bulletproof plugboard according to claim 1, wherein the cell size of the aramid fiber honeycomb is 1.83-4.8 mm; the D50 of the hollow glass microspheres is 20-100 micrometers, the density of the hollow glass microspheres is 0.2-0.5 g/cm 3 , and the isostatic resistance strength of the hollow glass microspheres is more than or equal to 5MPa.
  7. 7. The drop-resistant curved-surface spliced ceramic bulletproof plugboard according to claim 1, wherein the mass content of the hollow glass microspheres is 30% -70% based on the total mass of the hollow glass microspheres and the silica gel.
  8. 8. The drop-resistant curved-surface spliced ceramic bulletproof plugboard according to claim 1, wherein the thickness of the polyurea layer is 0.2-0.8 mm; the thickness of the foam layer for reducing concave bubbles is 3-5 mm.
  9. 9. The drop-resistant curved splice ceramic ballistic panel of claim 1 wherein the reduced-foam layer comprises ethylene-vinyl acetate copolymer foam, expanded polypropylene, or expanded polyurethane.
  10. 10. A method for preparing the anti-falling curved surface spliced ceramic bulletproof plugboard according to any one of claims 1-9, which is characterized by comprising the following steps: And (3) bonding one side of the ceramic layer to the polyethylene layer, bonding the crack-stopping layer on the other side of the ceramic layer, then bonding the anti-falling layer to the other side of the crack-stopping layer, bonding the concave foam-reducing cotton layer on the other side of the polyethylene layer, putting the concave foam-reducing cotton layer on a curved surface tool for shaping, and spraying polyurea on the periphery of the shaped sample after shaping.

Description

Anti-falling curved surface spliced ceramic bulletproof plugboard and preparation method thereof Technical Field The invention relates to the field of ceramic bulletproof plugboards, in particular to an anti-falling curved surface spliced ceramic bulletproof plugboard and a preparation method thereof. Background The ceramic bulletproof flashboard is a core product for realizing high-grade protection of the bulletproof clothes, and is mainly formed by crushing, abrading and passivating a warhead by high-hardness ceramic on the bullet facing surface, and the residual kinetic energy is absorbed by a backboard pressed by aramid fiber or ultra-high molecular weight polyethylene fiber. Because the ceramic has the characteristic of large brittleness, the problem of insufficient anti-falling performance exists in the practical application of the bulletproof plugboard, particularly, the problem that the curved bulletproof plugboard has a protruding surface, so that falling cracks are more easily generated, and the bulletproof performance of the plugboard is greatly weakened. In order to simulate the drop condition of the spile in daily use, the NIJ0101.07 standard of the United states department of judicial requires that the bulletproof spile is subjected to a drop test for 2 times and then subjected to a bulletproof test, so that the bulletproof spile can meet the test requirement by adding a falling-resistant layer. The existing anti-falling layer is mainly made of foaming materials, such as foaming EVA, foaming PP, polyurethane foam and the like, has the problem of low impact compression strength, and the thickness of the anti-falling layer needs to be more than 4mm to meet the anti-falling requirement, so that the thickness of the bulletproof plugboard is overlarge, the weight of the anti-falling layer is increased more, and a low-thickness lightweight anti-falling layer structural design is urgently needed. Disclosure of Invention The invention provides a falling-resistant curved-surface spliced ceramic bulletproof plugboard and a preparation method thereof, and the falling-resistant curved-surface spliced ceramic bulletproof plugboard has the characteristics of strong falling-layer bearing capacity, light weight and small thickness, and can prevent ceramic falling and cracking. In order to solve the technical problems, the invention provides the following technical scheme: the invention provides an anti-falling curved surface spliced ceramic bulletproof plugboard, which comprises a laminated structure and a polyurea layer coated on the periphery of the laminated structure; The laminated structure comprises a falling-resistant layer, a crack-stopping layer, a ceramic layer, a polyethylene layer and a concave foam reducing layer which are sequentially laminated in the direction from an elastic facing surface to an elastic backing surface; the anti-falling curved surface spliced ceramic bulletproof plugboard is of an arc-shaped structure, wherein in the arc-shaped structure, the convex surface is an elastic facing surface, and the concave surface is a back elastic surface; The anti-falling layer comprises an aramid honeycomb, and the cells of the aramid honeycomb are filled with a mixture of hollow glass microspheres and silica gel; the crack stop layer comprises aramid woven cloth. In some embodiments, the ceramic layer comprises silicon carbide, boron carbide, or aluminum oxide. In some specific embodiments, the ceramic layer is formed by bonding and splicing a plurality of hexagonal ceramics, and the length of the opposite sides of the hexagonal ceramics is 20-30 mm. In some embodiments, the ceramic layer has a thickness of 3mm or greater. In some embodiments, the crack stop layer has a thickness of 0.5mm or more. In some embodiments, the polyethylene layer has a thickness of 7mm or more and the polyethylene fibers in the polyethylene layer have a strength of greater than 36cN/dtex. In some embodiments, the thickness of the anti-drop layer is 1-2 mm. In some specific embodiments, the cell size of the aramid fiber honeycomb is 1.83-4.8 mm. In some embodiments, the D50 of the hollow glass microspheres is 20-100 microns, the density of the hollow glass microspheres is 0.2-0.5 g/cm 3, and the isostatic resistance of the hollow glass microspheres is more than or equal to 5MPa. In some embodiments, the mass content of the hollow glass microspheres is 30% -70% based on the total mass of the hollow glass microspheres and the silica gel. In some embodiments, the thickness of the polyurea layer is 0.2-0.8 mm. In some embodiments, the thickness of the foam layer for reducing the concave bubbles is 3-5 mm. In some embodiments, the reduced-foam layer comprises ethylene-vinyl acetate copolymer (EVA) foam, expanded polypropylene (PP), or expanded polyurethane. The invention also provides a preparation method of the anti-falling curved surface spliced ceramic bulletproof plugboard, which comprises the following steps: And (3)