Novel anti-falling bulletproof ceramic composite plugboard and preparation method thereof

Abstract

The invention provides a novel anti-falling bulletproof ceramic composite plugboard and a preparation method thereof, and belongs to the technical field of bulletproof plugboards. The novel anti-falling bulletproof ceramic composite plugboard comprises an inner plugboard layer and an outer wrapping layer wrapping the inner plugboard layer. The inner inserting plate layer comprises a wear-resisting buffer layer, an anti-falling shock absorption layer, a ceramic protection layer, a fiber protection layer and a close-fitting anti-falling layer which are arranged in a stacked mode. The wear-resistant buffer layer is made of felt cloth or non-woven fabric, the anti-falling shock absorption layer is made of a wavy or surface-wavy foaming material, and the close-fitting anti-falling layer is made of a foaming material; the outer wrapping layer comprises a side face anti-falling layer and outer wrapping cloth, wherein the side face anti-falling layer surrounds the side face of the inner inserting plate layer by a circle. The side face anti-falling layer is made of foaming materials, and the outer layer wrapping cloth is polyester cloth with the surface coated with a polyvinyl chloride coating. According to the novel anti-falling bulletproof ceramic composite plugboard, the problem that the bulletproof ceramic composite plugboard is poor in anti-falling performance is solved through the unique structural design, and meanwhile the novel anti-falling bulletproof ceramic composite plugboard has the advantages of being light in weight and light and thin.

Description

Technical Field

[0001] This invention relates to the field of bulletproof insert technology, specifically to a novel drop-resistant bulletproof ceramic composite insert and its preparation method. Background Technology

[0002] Ballistic ceramic composite plates have become an important type of individual ballistic protection equipment due to their excellent ballistic performance. Ballistic ceramics, a key component of these plates, possess advantages such as high hardness, high strength, high temperature resistance, and corrosion resistance. However, they also have disadvantages such as high brittleness, low toughness, and poor drop resistance. In cases of significant impact, such as drops, heavy object impacts, or personnel falling, the ceramic surface is highly susceptible to cracking or shattering, leading to reduced or no protective effect of the ballistic ceramic composite plate and impacting combat effectiveness.

[0003] To improve the drop resistance of bulletproof ceramic composite inserts, the current industry practice is to add a thick layer of polyurethane, polyethylene, or polyvinyl chloride foam material in front of the ceramic layer. However, this increases the overall thickness and weight of the bulletproof ceramic composite insert, which does not meet the development requirements for lightweight bulletproof inserts.

[0004] Patent CN222353003U discloses a bulletproof insert structure with impact-resistant and rebounding properties. It achieves impact and drop resistance by arranging a front and rear shock-absorbing layer of closed-cell foam material, combined with evenly distributed ceramic balls. However, its manufacturing process is complex and requires sophisticated equipment. Patent CN210346484U discloses a bulletproof insert and bulletproof vest. It improves drop resistance by adding a layer of foam material or two layers of foam material with different hardness in front of the ceramic layer. However, it suffers from increased overall thickness and weight due to the increased bulletproof ceramic composite insert, and lacks drop protection measures for the sides of the insert / ceramic. If the insert sides hit the ground, the ceramic is still prone to breakage, causing the insert to fail. Patent CN104930917A discloses a multi-curved ceramic composite bulletproof insert, which provides drop protection by setting a pressure-resistant cushioning material of polyurethane foam, polyethylene foam or polystyrene foam with openings on the ceramic surface and EVA or PP material filler on the side of the insert. However, it has the disadvantage of increasing the overall thickness and weight of the bulletproof ceramic composite insert.

[0005] The novel drop-resistant bulletproof ceramic composite insert of the present invention features a unique structural design that uses multiple materials and angles to protect the ceramic from drops, solving the problem of poor impact and drop resistance of bulletproof ceramic composite inserts. It also has the advantages of being lightweight and thin, and has a promising application prospect in the field of personal protective equipment. Summary of the Invention

[0006] Based on this, in order to address the problem of poor drop resistance performance of the aforementioned bulletproof ceramic composite inserts, a novel drop-resistant bulletproof ceramic composite insert and its preparation method are provided.

[0007] A novel drop-resistant bulletproof ceramic composite insert includes an inner insert layer and an outer covering layer surrounding the inner insert layer. The inner insert layer comprises a wear-resistant buffer layer, a drop-resistant shock-absorbing layer, a ceramic protective layer, a fiber protective layer, and a close-fitting drop-resistant layer, all stacked together. The outer covering layer includes a side drop-resistant layer surrounding the sides of the inner insert layer and an outer fabric covering.

[0008] Furthermore, the wear-resistant buffer layer is made of felt or non-woven fabric with a surface density of 180-250 g / m³. 2 The thickness is 1-1.5mm.

[0009] Furthermore, the anti-drop and shock-absorbing layer is wavy or has a wavy surface, and the material of the anti-drop and shock-absorbing layer is one of melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam or polyvinyl chloride foam. The thickness of the anti-drop and shock-absorbing layer is 1-2mm, the wave height of the anti-drop and shock-absorbing layer is 2-5mm, and the wave pitch of the anti-drop and shock-absorbing layer is 4-20mm.

[0010] Furthermore, the ceramic protective layer is made of one or more of alumina ceramic, silicon carbide ceramic, boron carbide ceramic, titanium boride ceramic, or boron nitride ceramic, and the ceramic is in the form of small-size splicing, whole plate, or layered.

[0011] Furthermore, the protective material of the fiber protective layer is one or more of the following high-performance fibers: ultra-high molecular weight polyethylene fiber, aramid fiber, carbon fiber, glass fiber, etc.

[0012] Furthermore, the close-fitting anti-drop layer is one of melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam or polyvinyl chloride foam, with a thickness of 1-15mm and a Shore hardness of 10-70HA.

[0013] Furthermore, the side impact-resistant layer is made of one of the following materials: melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam, or polyvinyl chloride foam, with a thickness of 1-4 mm, a width equal to the sum of the thickness of the ceramic layer and the fiber layer, and a Shore hardness of 10-25 HA.

[0014] Furthermore, the outer covering material is polyester fabric with a density of 500-700D and a peel strength of 0.5-1.2N / mm.

[0015] Furthermore, the outer surface of the outer layer is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

[0016] This invention also provides a method for preparing the novel drop-resistant bulletproof ceramic composite insert described above, comprising the following steps:

[0017] S1: The ceramic protective layer and the fiber protective layer are bonded together by applying adhesive, hot pressing of adhesive film or vacuum negative pressure to obtain semi-finished product 1;

[0018] S2: Apply adhesive to one side of the side anti-drop layer and bond it to the side of the semi-finished product 1 described in step S1 to obtain semi-finished product 2.

[0019] S3: Apply adhesive to one side of the shock-absorbing layer and bond it to the ceramic protective layer of the semi-finished product 2 described in step S2 to obtain the semi-finished product 3.

[0020] S4: Coat one side of the wear-resistant buffer layer with adhesive and bond it to the drop-resistant and shock-absorbing layer of the semi-finished product 3 described in step S3 to obtain the semi-finished product 4.

[0021] S5: Apply adhesive to one side of the close-fitting anti-fall layer and bond it to the fiber protective layer of the semi-finished product 4 described in step S4 to obtain the semi-finished product 5.

[0022] S6: Wrap the semi-finished product 5 described in step S5 with an outer layer of fabric.

[0023] Furthermore, in steps S2, S3, S4, and S5, the adhesive is one or more of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive, or silicone adhesive, and the adhesive coating amount is 100-400 g / m². 2 .

[0024] Compared with the prior art, the implementation of the present invention has at least the following advantages:

[0025] 1. The novel drop-resistant bulletproof ceramic composite insert of the present invention comprises an inner insert layer and an outer covering layer covering the inner insert layer. The inner insert layer comprises a wear-resistant buffer layer, a drop-resistant shock-absorbing layer, a ceramic protective layer, a fiber protective layer, and a close-fitting drop-resistant layer, all stacked together. The outer covering layer comprises a side drop-resistant layer surrounding the sides of the inner insert layer and an outer fabric covering. The wear-resistant buffer layer, the drop-resistant shock-absorbing layer, the close-fitting drop-resistant layer, the side drop-resistant layer, and the outer fabric covering all contribute positively to improving the drop resistance performance of the insert.

[0026] 2. The wear-resistant buffer layer is made of felt or non-woven fabric. Its internal three-dimensional mesh-like pore structure can undergo elastic deformation under pressure, effectively absorbing impact energy. Simultaneously, its interwoven fibers allow for mutual restraint and dispersion of frictional force during friction, thereby improving the wear resistance of the insert and extending its lifespan in rough friction scenarios such as drops onto concrete surfaces. The drop-resistant shock-absorbing layer is made of corrugated or wavy foam material. The numerous micropores within the foam material deform, collapse, and rub against impacts, absorbing impact energy. The corrugated shape, with its bending and undulating form, provides a longer deformation path, making it easier to undergo localized deformation under impact, thus dispersing impact energy. Furthermore, the corrugated shape can trigger multi-stage energy dissipation processes through the difference in peak and trough deformation, thereby improving the insert's impact and drop resistance. The inner and side impact-resistant layers are made of melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam, or polyvinyl chloride foam. These layers effectively absorb impact energy, reducing damage to the back and sides of the board upon impact and improving its overall drop resistance. The outer fabric is a polyester fabric with hemispherical protrusions on its surface containing solid nitrile rubber microparticles, which absorbs energy and reduces impact force during a drop.

[0027] 3. The method for preparing the novel anti-drop bulletproof ceramic composite insert described in this invention patent is simple, stable, reliable, and can be mass-produced. The addition of the wear-resistant buffer layer and the anti-drop shock-absorbing layer will only increase the overall weight of the bulletproof insert by about 30g and the thickness by 2-3.5mm, which has obvious advantages in thickness, weight and economy. Attached Figure Description

[0028] Figure 1 This is a three-dimensional view of the disassembled structure of the novel drop-resistant bulletproof ceramic composite insert plate described in this invention.

[0029] Among them, (1) - wear-resistant buffer layer, (2) - drop-resistant and shock-absorbing layer, (3) - ceramic protective layer, (4) - fiber protective layer, (5) - close-fitting drop-resistant layer, (6) - side drop-resistant layer, (7) - outer layer fabric.

[0030] Figure 2 It is a wave-shaped shock-absorbing layer for impact resistance. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment describes a novel drop-resistant bulletproof ceramic composite insert with an inner insert layer and an outer covering layer. The inner insert layer includes a layered wear-resistant buffer layer, a drop-resistant shock-absorbing layer, a ceramic protective layer, a fiber protective layer, and a close-fitting drop-resistant layer. The outer covering layer includes a side drop-resistant layer surrounding the inner insert layer and an outer fabric covering.

[0034] The wear-resistant cushioning layer is made of felt cloth with a surface density of 220 g / m². 2 The thickness is 1.5mm.

[0035] The shock-absorbing layer is made of wavy polypropylene foam with a thickness of 2mm, a wave height of 3mm, and a wave pitch of 5mm.

[0036] The ceramic protective layer is made of silicon carbide ceramic, and is a single piece with a thickness of 9mm.

[0037] The fiber layer protective material is an ultra-high molecular weight polyethylene fiber membrane with a thickness of 10mm.

[0038] The close-fitting drop-resistant layer is made of polypropylene foam, with a thickness of 5mm and a Shore hardness of 55HA.

[0039] The side impact protection layer is made of polyurethane foam, with a thickness of 2mm, a width of 19mm, and a Shore hardness of 12HA.

[0040] The outer layer is made of polyester fabric with a density of 600D and a peel strength of 0.8N / mm. The outer surface of the polyester fabric is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

[0041] The preparation was carried out according to the preparation method described in this patent. The coating adhesive is an epoxy adhesive, and the coating amount is 200 g / m². 2 .

[0042] With the above-mentioned structural design, the bulletproof insert 1 provided in this application, after being dropped freely from a height of 1.2m onto a cement ground, shows no cracks on the ceramic surface. Furthermore, the insert after the drop can effectively withstand the impact of a 1953-type 7.62mm armor-piercing incendiary round, and the indentation value of the putty at the impact point is less than 25mm, meeting the special protection requirements in "GA141-2010 Police Bulletproof Vest".

[0043] Example 2

[0044] This embodiment describes a novel drop-resistant bulletproof ceramic composite insert with an inner insert layer and an outer covering layer. The inner insert layer includes a layered wear-resistant buffer layer, a drop-resistant shock-absorbing layer, a ceramic protective layer, a fiber protective layer, and a close-fitting drop-resistant layer. The outer covering layer includes a side drop-resistant layer surrounding the inner insert layer and an outer fabric covering.

[0045] The wear-resistant cushioning layer is made of felt cloth with a surface density of 220 g / m². 2 The thickness is 1mm.

[0046] The shock-absorbing layer is made of wavy polypropylene foam with a thickness of 2mm, a wave height of 4mm, and a wave pitch of 5mm.

[0047] The ceramic protective layer is made of silicon carbide ceramic, and is a single piece with a thickness of 9mm.

[0048] The fiber layer protective material is an ultra-high molecular weight polyethylene fiber membrane with a thickness of 10mm.

[0049] The close-fitting drop-resistant layer is made of polypropylene foam, with a thickness of 5mm and a Shore hardness of 55HA.

[0050] The side impact protection layer is made of polyurethane foam, with a thickness of 2mm, a width of 19mm, and a Shore hardness of 12HA.

[0051] The outer layer is made of polyester fabric with a density of 600D and a peel strength of 0.8N / mm. The outer surface of the polyester fabric is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

[0052] The preparation was carried out according to the preparation method described in this patent. The coating adhesive is an epoxy adhesive, and the coating amount is 200 g / m². 2 .

[0053] With the above-mentioned structural design, the bulletproof insert 2 provided in this application, after being dropped freely from a height of 1.2m onto a cement ground, shows no cracks on the ceramic surface. Furthermore, the insert after the drop can effectively withstand the impact of a 1953-type 7.62mm armor-piercing incendiary round, and the indentation value of the putty at the impact point is less than 25mm, meeting the special protection requirements in "GA141-2010 Police Bulletproof Vest".

[0054] Comparative Example 1

[0055] The bulletproof ceramic composite insert structure described in this comparative example differs from the novel drop-resistant bulletproof ceramic composite insert structure described in this patent in that the bulletproof ceramic composite insert structure described in this comparative example does not contain a wear-resistant buffer layer or a drop-resistant shock-absorbing layer.

[0056] The ceramic protective layer is made of silicon carbide ceramic, and is a single piece with a thickness of 9mm.

[0057] The fiber layer protective material is an ultra-high molecular weight polyethylene fiber membrane with a thickness of 10mm.

[0058] The close-fitting drop-resistant layer is made of polypropylene foam, with a thickness of 5mm and a Shore hardness of 55HA.

[0059] The side impact protection layer is made of polyurethane foam, with a thickness of 2mm, a width of 19mm, and a Shore hardness of 12HA.

[0060] The outer layer is made of polyester fabric with a density of 600D and a peel strength of 0.8N / mm. The outer surface of the polyester fabric is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

[0061] The preparation was carried out according to the preparation method described in this patent. The coating adhesive is an epoxy adhesive, and the coating amount is 200 g / m². 2 .

[0062] With the above-mentioned structural design, the bulletproof insert 3 provided in this application, after being dropped from a height of 1.2m onto a cement ground, developed multiple cracks on its ceramic surface. After the drop, the insert was penetrated by a 1953 7.62mm armor-piercing incendiary round, failing to provide effective protection.

[0063] Comparative Example 2

[0064] The bulletproof ceramic composite insert structure described in this comparative example differs from the novel drop-resistant bulletproof ceramic composite insert structure described in this patent in that the bulletproof ceramic composite insert structure described in this comparative example does not contain a drop-resistant shock-absorbing layer.

[0065] The wear-resistant cushioning layer is made of felt cloth with a surface density of 220 g / m². 2 The thickness is 1mm.

[0066] The ceramic protective layer is made of silicon carbide ceramic, and is a single piece with a thickness of 9mm.

[0067] The fiber layer protective material is an ultra-high molecular weight polyethylene fiber membrane with a thickness of 10mm.

[0068] The close-fitting drop-resistant layer is made of polypropylene foam, with a thickness of 5mm and a Shore hardness of 55HA.

[0069] The side impact protection layer is made of polyurethane foam, with a thickness of 2mm, a width of 19mm, and a Shore hardness of 12HA.

[0070] The outer layer is made of polyester fabric with a density of 600D and a peel strength of 0.8N / mm. The outer surface of the polyester fabric is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

[0071] The preparation was carried out according to the preparation method described in this patent. The coating adhesive is an epoxy adhesive, and the coating amount is 200 g / m². 2 .

[0072] With the above-mentioned structural design, the bulletproof insert 4 provided in this application, after being dropped from a height of 1.2m onto a cement ground, showed two obvious cracks on its ceramic surface. After the drop, the insert was penetrated by a 1953 7.62mm armor-piercing incendiary round, failing to provide effective protection.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel drop-resistant bulletproof ceramic composite insert and its preparation method, characterized in that: The novel anti-drop bulletproof ceramic composite insert includes an inner insert layer and an outer covering layer covering the inner insert layer. The inner insert layer includes a wear-resistant buffer layer, an anti-drop shock-absorbing layer, a ceramic protective layer, a fiber protective layer, and a close-fitting anti-drop layer stacked together. The outer covering layer includes a side anti-drop layer surrounding the side of the inner insert layer and an outer fabric covering.

2. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that: The wear-resistant buffer layer is made of felt or non-woven fabric with a surface density of 180-250 g / m³. 2 The thickness is 1-1.5mm.

3. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that: The shock-absorbing layer is wavy or has a wavy surface. The material of the shock-absorbing layer is one of melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam, or polyvinyl chloride foam. The thickness of the shock-absorbing layer is 1-2 mm, the wave height of the shock-absorbing layer is 2-5 mm, and the wave pitch of the shock-absorbing layer is 4-20 mm.

4. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that: The close-fitting anti-drop layer is one of melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam or polyvinyl chloride foam, with a thickness of 1-15mm and a Shore hardness of 10-70HA.

5. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that: The side impact-resistant layer is made of one of the following materials: melamine foam, polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam, or polyvinyl chloride foam. The thickness is 1-4 mm, the width is the sum of the thickness of the ceramic layer and the thickness of the fiber layer, and the Shore hardness is 10-25 HA.

6. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that: The outer layer is made of polyester fabric with a density of 500-700D and a peel strength of 0.5-1.2N / mm.

7. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 6, characterized in that: The outer surface of the outer layer is coated with a polyvinyl chloride coating, and the outer surface of the polyvinyl chloride coating has hemispherical protrusions containing solid nitrile rubber microparticles.

8. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 1, characterized in that, Includes the following steps: S1: The ceramic protective layer and the fiber protective layer are bonded together by applying adhesive, hot pressing of adhesive film or vacuum negative pressure to obtain semi-finished product 1; S2: Apply adhesive to one side of the side anti-drop layer and bond it to the side of the semi-finished product 1 described in step S1 to obtain semi-finished product 2. S3: Apply adhesive to one side of the shock-absorbing layer and bond it to the ceramic protective layer of the semi-finished product 2 described in step S2 to obtain the semi-finished product 3. S4: Coat one side of the wear-resistant buffer layer with adhesive and bond it to the drop-resistant and shock-absorbing layer of the semi-finished product 3 described in step S3 to obtain the semi-finished product 4. S5: Apply adhesive to one side of the close-fitting anti-fall layer and bond it to the fiber protective layer of the semi-finished product 4 described in step S4 to obtain the semi-finished product 5. S6: Wrap the semi-finished product 5 described in step S5 with an outer layer of fabric.

9. The novel drop-resistant bulletproof ceramic composite insert and its preparation method according to claim 8, characterized in that: In steps S2, S3, S4, and S5, the adhesive is one or more of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive, or silicone adhesive, and the adhesive coating amount is 100-400 g / m². 2 .

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