CN117685825A - Tank armor protection type protective layer and preparation method and application thereof - Google Patents
Tank armor protection type protective layer and preparation method and application thereof Download PDFInfo
- Publication number
- CN117685825A CN117685825A CN202311706727.7A CN202311706727A CN117685825A CN 117685825 A CN117685825 A CN 117685825A CN 202311706727 A CN202311706727 A CN 202311706727A CN 117685825 A CN117685825 A CN 117685825A
- Authority
- CN
- China
- Prior art keywords
- protective layer
- armor
- tank armor
- tank
- protective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011241 protective layer Substances 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000010410 layer Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 26
- 239000000835 fiber Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 230000001012 protector Effects 0.000 claims description 14
- 239000011358 absorbing material Substances 0.000 claims description 10
- 229920001778 nylon Polymers 0.000 claims description 10
- 239000012779 reinforcing material Substances 0.000 claims description 10
- 239000011324 bead Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- 229920006231 aramid fiber Polymers 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 210000002683 foot Anatomy 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 210000003423 ankle Anatomy 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 210000003127 knee Anatomy 0.000 claims description 2
- 239000011325 microbead Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 229920000271 Kevlar® Polymers 0.000 description 8
- 239000004761 kevlar Substances 0.000 description 8
- 239000004417 polycarbonate Substances 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 4
- 239000004695 Polyether sulfone Substances 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920006393 polyether sulfone Polymers 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 2
- 239000012994 photoredox catalyst Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007589 penetration resistance test Methods 0.000 description 1
- 229920003208 poly(ethylene sulfide) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Helmets And Other Head Coverings (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses a tank armor protective layer and a preparation method and application thereof. Comprises n tank armor protective layers, wherein n is a positive integer between 1 and 50; each tank armor protective layer is mutually bonded by bonding and unloading the energy-absorbing protective layer. The bonding layer formed by using the bonding material with a certain energy absorption effect has certain viscosity and energy absorption, and can generate energy absorption and dislocation movement in the collision and puncture processes, thereby improving the protection capability. After the protective layer of the multilayer tank armor protection type is added, the energy absorption and puncture protection effects can be further improved, and the armor protection type capability of the protective layer can be further improved. The preparation process is simple.
Description
Technical Field
The application relates to a tank armor protective layer, a preparation method and application thereof, and belongs to the field of protective equipment.
Background
Helmets are a common protective tool in everyday life, where the protective properties of the helmet shell are important properties of the helmet, but currently the helmet shell is mainly a single plastic or a single fiber reinforced resin based composite material. When the shell is made of single plastic, the rigidity is poor, the rigidity is improved by increasing the thickness, the weight of the product is increased, the burden of the head/neck is increased, and the shell is extremely easy to split when being impacted after aging, so that the comfort and the safety of experience are poor; when the shell is made of a single fiber reinforced resin matrix composite material, the shell is easy to brittle fracture when subjected to shearing external force, and the safety puncture-preventing effect is poor. The safety of the helmet shell is still to be improved.
Disclosure of Invention
In order to improve the protective properties of protective equipment, in particular helmets. The application provides a tank armor protective layer, a preparation method and application thereof.
According to one aspect of the present application, there is provided a protective layer of tank armor comprising n layers of tank armor protective layers, n being selected from a positive integer between 1 and 50;
when n is 1, the tank armor protective layer is covered by the bonding unloading energy-absorbing protective layer;
each tank armor protective layer is mutually bonded by bonding and unloading the energy-absorbing protective layer.
Specifically, a first tank armor protective layer, a first bonding force-unloading energy-absorbing protective layer, a second tank armor protective layer, a second bonding force-unloading energy-absorbing protective layer and a third tank armor protective layer are sequentially arranged from outside to inside, and so on.
The tank armor protective layer is made of at least one material selected from fiber reinforced resin, PC material, ABS material, PP material, aramid fiber (such as Kevlar), ultra-high molecular weight PE, nylon fiber, carbon fiber, glass fiber and the like;
optionally, the fiber reinforced resin comprises fibers and a resin;
the fiber is at least one selected from carbon fiber, glass fiber, aramid fiber, ultra-high molecular weight PE and nylon fiber;
the resin is at least one selected from EPOXY resin, PC resin and phenolic resin;
optionally, adjacent two tank armor protective layers are of different materials.
Optionally, the material of the outermost tank armor protective layer is not kevlar.
The thickness of the tank armor protective layer is 0.05-3 mm;
optionally, the thickness of the tank armor protective layer is 0.2-2 mm.
Alternatively, the outermost tank armor protective layer is thicker than the inner tank armor protective layer.
Optionally, the outer tank armor protective layer is thicker than the inner tank armor protective layer.
The bonding force-unloading energy-absorbing protective layer comprises a bonding material, a toughness reinforcing material and an energy-absorbing material.
In the bonding force-unloading energy-absorbing protective layer, the mass content of the toughness reinforcing material and the energy-absorbing material is not more than 85%;
optionally, the mass content of the toughness reinforcing material is 20-75%;
optionally, the mass content of the energy absorbing material is 30-85%.
The bonding material is at least one selected from polyurethane, polypropylene and PA, PES, TPU, EVA, PO, EAA; the bonding material is made of a single material or a composite material with both adhesion and energy absorption.
The average molecular weight of the binding material is 5000-3500000;
optionally, the average molecular weight of the binding material is 30000 to 150000.
The toughness reinforcing material and the energy absorbing material are selected from dispersed particles and/or net-shaped materials;
the dispersed particles are selected from organic, inorganic or metallic hollow beads or foam.
The dispersion particles are at least one of hollow microbeads of thermosetting resin, hollow glass beads, hollow titanium beads, titanium micro-foam and aluminum micro-foam;
the net-shaped material is at least one selected from ultra-high molecular weight PE, aramid fiber and nylon fiber.
According to another aspect of the present application, there is provided a method for preparing the protective layer of the tank armor, comprising the steps of:
and immersing the toughness reinforcing material and the energy-absorbing material in the binding material to obtain a binding force-unloading energy-absorbing protective layer, and binding the tank armor protective layer by the binding force-unloading energy-absorbing protective layer to obtain the tank armor protective layer.
According to another aspect of the present application, there is provided the use of the tank armor protective type protective layer described above for the outer casing of protective equipment.
The protective equipment comprises a helmet, an elbow protector, an arm protector, a knee protector, a neck protector, a shin protector, an ankle protector, a protective vest, a protective trousers and a protective shoe.
In the present application, EPOXY resin is EPOXY resin;
PC is polycarbonate resin;
ABS is an acrylonitrile-butadiene-styrene copolymer;
PP is polypropylene;
PA is a polyamide resin;
PES is polyethersulfone;
the TPU is a thermoplastic polyurethane elastomer;
EVA is ethylene-vinyl acetate copolymer;
PO is a polyolefin copolymer;
EAA is an ethylene-acrylic acid copolymer;
PE is polyethylene.
The beneficial effects that this application can produce include:
1) The application provides a tank armor protective layer uses the adhesive linkage that the bonding material formed that has certain energy-absorbing effect to have certain viscous flow nature, toughness and energy-absorbing nature, at the in-process that takes place the puncture, can produce dislocation and remove, and then promotes protective capability.
2) The protection layer of tank armor protection formula that this application provided can further promote the energy-absorbing effect after adding multilayer tank armor protection formula inoxidizing coating, can be further promote tank armor protection formula ability.
3) The preparation method of the tank armor protective layer provided by the application is simple in preparation process.
Drawings
Fig. 1 is a schematic structural view of a protective layer of a tank armor prepared in example 1 of the present application.
List of parts and reference numerals:
1. the first tank armor protective layer, the bonding unloading energy-absorbing protective layer, the second tank armor protective layer and the bonding unloading energy-absorbing protective layer.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
Unless otherwise indicated, all starting materials in the examples of the present application were purchased commercially.
In this example, the polyurethane binder is purchased from lerian and has an average molecular weight of 30000 to 100000; the fiber reinforced resin is obtained according to the preparation method in US9840058B 2; PC materials, ABS materials, PP materials, etc. are all commercially available.
Example 1
The required bonding material is prepared by using 1000g of polyurethane material with the average molecular weight of 30000 to impregnate 300g of hollow glass beads and 700g of Kevlar fabric sheet, and a first tank armor protective layer 1 made of fiber reinforced resin (specifically carbon fiber, glass fiber and Kevlar fiber hybrid reinforced epoxy resin) and a second tank armor protective layer 3 made of PC material are bonded and molded to obtain the tank armor protective layer formed by sequentially bonding the first tank armor protective layer 1, the bonding layer 2 and the second tank armor protective layer 3, as shown in figure 1.
Wherein the thickness of the first tank armor protective layer 1 is 1.0mm. The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the second tank armor protective layer 3 is 0.5mm.
The protective layer of the tank armor prepared by the embodiment is used for a helmet shell or a armor protector, polyurethane materials are used as bonding materials, and the formed bonding layer has certain viscosity, toughness and energy absorption property, and can generate dislocation movement in the process of puncture, so that the protective capability of the tank armor is improved. This embodiment only describes the case where the number of layers is three, and so on when the number of layers is greater.
And (5) carrying out penetration resistance test on the helmet. The results show that:
the helmet of example 1 was subjected to a class ii helmet penetration energy (29.4J) test in GJB1564A, the helmet not penetrated, and the technical requirements were met.
The helmet of example 1 was subjected to puncture resistance in T/JSEBA, and 3.0Kg of steel cone was dropped 1.0m,2 times, and the helmet was not penetrated, meeting the standard requirements.
Example 2
The required bonding material is prepared by using 1000g of polyurethane material with the average molecular weight of 30000 to impregnate 300g of hollow glass beads and 630g of nylon fabric sheet (N1260 nylon cord), and a first tank armor protective layer 1 made of fiber reinforced resin (specifically carbon fiber, glass fiber and Kevlar fiber hybrid reinforced epoxy resin) and a second tank armor protective layer 3 made of Kevlar fiber reinforced PC resin material are bonded and molded to obtain a tank armor protective layer formed by sequentially bonding the first tank armor protective layer 1, the bonding layer 2 and the second tank armor protective layer 3, as shown in figure 1.
Wherein the thickness of the first tank armor protective layer 1 is 1.2mm. The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the second tank armor protective layer 3 is 0.7mm.
The protective layer of the tank armor prepared by the embodiment is used for a helmet shell or a armor protector, polyurethane materials are used as bonding materials, and the formed bonding layer has certain viscosity, toughness and energy absorption property, and can generate dislocation movement in the process of puncture, so that the protective capability of the tank armor is improved. This embodiment only describes the case where the number of layers is three, and so on when the number of layers is greater.
The helmet of example 2 was subjected to a penetration energy (29.4J) test for class II helmets in GJB1564A and a puncture resistance test in T/JSEBA, and similar to the results of example 1, the helmet was not penetrated, and met the technical requirements.
Example 3
The required bonding material is prepared by using 1000g of polyurethane material with the average molecular weight of 30000 to impregnate 300g of hollow glass beads and 630g of nylon fabric sheet (N1260 nylon cord), and a first tank armor protective layer 1 made of fiber reinforced resin (specifically carbon fiber, glass fiber and Kevlar fiber hybrid reinforced epoxy) and a second tank armor protective layer 3 made of Kevlar fiber reinforced epoxy material are bonded and molded to obtain a tank armor protective layer formed by sequentially bonding the first tank armor protective layer 1, the bonding layer 2 and the second tank armor protective layer 3, as shown in figure 1.
Wherein the thickness of the first tank armor protective layer 1 is 1.0mm. The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the second tank armor protective layer 3 is 0.8mm.
The protective layer of tank armor that this embodiment prepared is used for helmet shell, uses polyurethane material as bonding material, and the adhesive linkage that its formed has certain viscous flow nature, toughness and energy-absorbing nature, takes place the in-process of puncture, can produce dislocation and remove, and then promotes tank armor protective capability. This embodiment only describes the case where the number of layers is three, and so on when the number of layers is greater.
The helmet of example 3 was subjected to a penetration energy (29.4J) test for class II helmets in GJB1564A and a puncture resistance test in T/JSEBA, and similar to the results of example 1, the helmet was not penetrated, and met the technical requirements.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (10)
1. A tank armor protective layer is characterized in that,
comprises n tank armor protective layers, wherein n is a positive integer between 1 and 50;
when n is 1, the tank armor protective layer is covered by the bonding unloading energy-absorbing protective layer;
each tank armor protective layer is mutually bonded by bonding and unloading the energy-absorbing protective layer.
2. The tank armor protective armor layer of claim 1,
the tank armor protective layer is made of at least one material selected from fiber reinforced resin, PC material, ABS material, PP material, aramid fiber, ultra-high molecular weight PE, nylon fiber, carbon fiber, glass fiber and the like;
preferably, the fiber reinforced resin comprises fibers and a resin;
the fiber is at least one selected from carbon fiber, glass fiber, aramid fiber, ultra-high molecular weight PE and nylon fiber;
the resin is at least one selected from EPOXY resin, PC resin and phenolic resin;
preferably, the materials of adjacent two tank armor protective layers are different.
3. The tank armor protective armor layer of claim 1,
the thickness of the tank armor protective layer is 0.05-3 mm;
preferably, the thickness of the tank armor protective layer is 0.2-2 mm.
4. The tank armor protective armor layer of claim 1,
the bonding force-unloading energy-absorbing protective layer comprises a bonding material, a toughness reinforcing material and an energy-absorbing material.
5. The tank armor protective armor layer of claim 4,
in the bonding force-unloading energy-absorbing protective layer, the mass content of the toughness reinforcing material and the energy-absorbing material is not more than 85%;
preferably, the mass content of the toughness reinforcing material is 20-75%;
preferably, the mass content of the energy absorbing material is 30-85%.
6. The tank armor protective armor layer of claim 4,
the bonding material is at least one selected from polyurethane, polypropylene and PA, PES, TPU, EVA, PO, EAA;
the average molecular weight of the binding material is 5000-3500000;
preferably, the average molecular weight of the binding material is 30000 to 150000.
7. The tank armor protective armor layer of claim 4,
the toughness reinforcing material and the energy absorbing material are selected from dispersed particles and/or net-shaped materials;
the dispersed particles are selected from organic, inorganic or metallic hollow beads or foam;
the dispersion particles are at least one of hollow microbeads of thermosetting resin, hollow glass beads, hollow titanium beads, titanium micro-foam and aluminum micro-foam;
the net-shaped material is at least one selected from ultra-high molecular weight PE, aramid fiber and nylon fiber.
8. A method for preparing a protective layer of a tank armor according to any one of claims 1 to 7,
the method comprises the following steps:
and immersing the toughness reinforcing material and the energy-absorbing material in the binding material to obtain a binding force-unloading energy-absorbing protective layer, and binding the tank armor protective layer by the binding force-unloading energy-absorbing protective layer to obtain the tank armor protective layer.
9. The use of a protective layer for tank armor according to any one of claims 1 to 7,
an enclosure for protective equipment.
10. The use according to claim 9, wherein,
the protective equipment comprises a helmet, an elbow protector, an arm protector, a knee protector, a neck protector, a shin protector, an ankle protector, a protective vest, a protective trousers and a protective shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311706727.7A CN117685825A (en) | 2023-12-12 | 2023-12-12 | Tank armor protection type protective layer and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311706727.7A CN117685825A (en) | 2023-12-12 | 2023-12-12 | Tank armor protection type protective layer and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117685825A true CN117685825A (en) | 2024-03-12 |
Family
ID=90134798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311706727.7A Pending CN117685825A (en) | 2023-12-12 | 2023-12-12 | Tank armor protection type protective layer and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117685825A (en) |
-
2023
- 2023-12-12 CN CN202311706727.7A patent/CN117685825A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2177123B1 (en) | Lightweight helmet shell and method for manufacturing the same | |
| KR102236608B1 (en) | Ballistic resistant sheets, articles comprising such sheets and methods of making the same | |
| JP2017537301A5 (en) | ||
| CN105066785B (en) | A kind of the aramid fiber bulletproof composite helmet and its forming method of special construction design | |
| CN102712164A (en) | Sandwich panels for aerospace structural application | |
| CN105841551A (en) | Bionic energy absorbing and cushioning lining for ballistic helmet | |
| CN106767165A (en) | A kind of inorganic powder coating thronproof cloth and preparation method thereof | |
| US6586351B1 (en) | Stab-resisting material, a coated carrier to be used therewith, and clothing made of said material | |
| WO2016201183A1 (en) | Ecostructural bicycle/activity sfety helmet | |
| CN110588094A (en) | Waste fiber, fabric and inorganic particle four-layer fusion-casting composite anti-puncture sheet and preparation method and application thereof | |
| CN110500918A (en) | Anti-stab resin sheet of the layer-by-layer composite step of micro-meter scale inorganic powder and preparation method thereof and purposes | |
| KR20170119326A (en) | Ballistic resistant sheets and uses of such sheets | |
| CN109795132A (en) | A kind of preparation method of bulletproof halmet | |
| CN117685825A (en) | Tank armor protection type protective layer and preparation method and application thereof | |
| WO2016133465A1 (en) | A composite laminate and its usage | |
| WO1990001883A1 (en) | Protective material | |
| US20150064397A1 (en) | Composite foam laminate and its usage | |
| KR20140080049A (en) | A Composite materials with shock-absorbing function and manufactured using a helmet | |
| JP3048909B2 (en) | Composite molding | |
| CN102632665A (en) | Aramid fiber reinforced resin based anti-puncturing compound material | |
| CN207197356U (en) | A kind of continous way resistance to blunt hinders bullet resistant material | |
| KR20210025383A (en) | Light-weight prepreg and method for producing the same | |
| GB2496638A (en) | Impact resistant material | |
| KR101838486B1 (en) | LightWeight bulletproof materials using unidirectional aramid sheet and hybrid matrix | |
| CN218764864U (en) | High-performance soft bulletproof layer composite structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |