CN102555353A - Bulletproof helmet and manufacturing method thereof - Google Patents
Bulletproof helmet and manufacturing method thereof Download PDFInfo
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- CN102555353A CN102555353A CN2011104565322A CN201110456532A CN102555353A CN 102555353 A CN102555353 A CN 102555353A CN 2011104565322 A CN2011104565322 A CN 2011104565322A CN 201110456532 A CN201110456532 A CN 201110456532A CN 102555353 A CN102555353 A CN 102555353A
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Abstract
The invention provides a bulletproof helmet and a manufacturing method thereof, which belong to the technical field of human body protective equipment. The bulletproof helmet takes non-woven cloth with polyethylene (PE) fiber embedded in thermoplastic polymer resin as a main inner-layer material, and reinforcement materials are covered on the inner surface and the outer surface. The reinforcement materials covered on the inner layer and the outer layer enable overall rigidity of the helmet to be further improved, and enable penetrating bullets to be prone to deformation and fail to penetrate through the helmet. The helmet no longer requires complex surface treatment, and adhesive force of coated paint is enhanced. A whole pressing process of the helmet is achieved through a performing process and a forming process and uses a hot pressing mold and a cold pressing mold respectively, production efficiency is led to be at least doubled, and the problem of energy consumption caused by repeated warming and cooling of a mold in the prior art is resolved.
Description
Technical field
The present invention relates to a kind of bulletproof halmet and preparation method thereof, particularly cover bulletproof halmet of reinforcement material and preparation method thereof in the surfaces externally and internally shop.
Background technology
Bulletproof halmet is a kind of important Individual Protection Kit.Modern bulletproof halmet has experienced the evolution from the steel helmet to fibre reinforced composites.In the nonmetal helmet kind of fiber-reinforced composite, mainly contain the glass fibre helmet, the polyamide fibre helmet, arylon helmet, the ultra-high molecular weight polyethylene helmet etc.
World War I, during the Second World War, the helmet of various countries' equipment mainly is to be stamped to form with potassium steel or other special steels, and is heavier, shellproof poor with heat-proof quality, wear uncomfortable, the danger that also has secondary fragment to hurt sb.'s feelings.The overall ballistic performance that the glass fibre helmet and nylon fibre strengthen the compound helmet is not high.The seventies in 20th century, the U.S. began to use aramid fiber development bulletproof halmet, and nineteen eighty-three goes into operational service, and this type of helmet is also extensively equipped by NATO Force.From late 1980s, superhigh molecular weight polyethylene fibers (abbreviating " PE fiber " among this paper as) begins into bulletproof halmet field.
At present, the material of the nonmetal bulletproof helmet mainly adopts second generation aramid fiber and PE fiber.But the price comparison of aramid fiber is expensive, is unfavorable for a large amount of application market.The PE fiber is a kind of high-tech product of the world today, has high strength, high-modulus, high tenacity, low-density characteristics, is the highest high-performance fiber of world today's specific strength, is the important foundation material of the national security and the national economic development of concerning.China's superhigh molecular weight polyethylene fibers industry constantly promotes at present, and its quality fully reaches shellproof requirement.
In cephalic protection, PE fiber compacting helmet quality is lighter.Because people's cervical vertebra ability to bear is limited, so the development of the PE fiber helmet is just obtaining more and more many attention.In Protection Product intelligentized day by day today, along with the introducing of annexes such as communication apparatus, the PE fiber helmet is light has opened up a new way for cephalic protection especially with thin advantage.Research shows that under the same conditions, superhigh molecular weight polyethylene fibers does not have the fabric that latitude cloth (being called for short " PE does not have latitude cloth " among this paper) is compared other various versions, and its bulletproof effect is best.No latitude cloth is the technology by the invention of U.S.'s allied signal (Allied Signal) company, claims the unidirectional array technology again.When preparing shellproof finished product, multilayer is not had the stack of latitude cloth, be placed in the mould, hot-forming under uniform temperature and pressure, adjacent no latitude measuring fiber is arranged in non-zero angle.Because the form of no latitude cloth is " unidirectional array ", the moment range of scatter that helps shock wave increases, and produces collaborative bulletproof effect, so the fibre structure of PE fiber bulletproof helmet first-selection is no latitude cloth.
At present, PE does not have latitude cloth and is mostly to adopt the PE fiber package to embed in the polymer thermoplastic matrix.Because the modular ratio of these polymer thermoplastic matrixes is less, so use the helmet of this material compacting on hardness, to have certain deficiency merely.Existing bulletproof halmet normally covers the ballistic fiber woven fabric to carry out hot pressing and processes in inside and outside surface shop; Though the woven fabric that the superficial layer shop is covered can prevent that PE from not having PE fiber stripped thread in the latitude cloth; Just can reach requirement but product surface need pass through sandblast, scrape equality complex processing method, and the adhesive force of surface-coated paint is little.
In addition, existing bulletproof halmet production technology, whole pressing process are on same mould, to accomplish.This process need to the heat temperature raising of this mould repeated multiple times, cool.So process undoubtedly can be brought huge energy loss, causes helmet processing cost higher.And intensification repeatedly, cooling need long time to accomplish, and cause the production cycle of the helmet long, and production efficiency is low.
Summary of the invention
The objective of the invention is to solve above-mentioned deficiency, a kind of bulletproof halmet and preparation method thereof is provided.Reinforcement material is covered in surfaces externally and internally shop through at the helmet, has not only improved the hardness of the helmet, the adhesive force that enhancing applies paint, can also shorten the helmet surface processing time, enhances productivity, and cuts down finished cost.
Bulletproof halmet of the present invention is the inside and outside surperficial reinforcement material of spreading the high strength glass fiber fabric that covers heat of immersion solidity fluoropolymer resin that does not have the latitude cloth preformed helmet at PE, forms through hot pressing.
The reinforcement material that shop, bulletproof halmet of the present invention surface is covered makes the bullet of bullet be easier to distortion, prevents that effectively the helmet from being penetrated by bullet.Simultaneously, bulletproof halmet of the present invention also has good defending performance to fragmentation.
Glass fabric in the above-mentioned reinforcement material is a plain weave, and the warp of this glass fabric, broadwise tension failure brute force are greater than 1600N/25mm, and density is preferably 150～200g/m
2The thermosetting polymer resin can be preferably epoxy resin for vinyl esters, unsaturated polyester (UP), epoxy resin or phenolic resin, and the preferred content of thermosetting polymer resin in reinforcement material is 30～35 weight %.
In addition, the manufacturing approach of bulletproof halmet of the present invention may further comprise the steps:
(1) 28～33 layers of PE is not had latitude cloth and carry out cutting, intersect neatly superimposed according to the shape and the size of the required helmet;
(2) put into the hot pressing preforming tool, be warming up to 90～100 ℃, the thermoplastic polymer resin that pressure 5～10MPa, heat-insulation pressure keeping made PE not have in the latitude cloth in 5～10 minutes is softening;
(3) preforming tool of colding pressing is put in taking-up rapidly, and pressure 5～10MPa kept 5～10 minutes, made the helmet obtain preformed;
(4) cover the reinforcement material of the high strength glass fiber fabric of heat of immersion solidity fluoropolymer resin in the surfaces externally and internally of preformed helmet shop;
(5) helmet that reinforcement material is covered in the shop is put into heat pressing and molding mold, is warming up to 120～125 ℃, boosts to 25～30MPa, and constant temperature and pressure kept 10～15 minutes;
(6) the cold pressing forming mould cooling and shaping is put in taking-up rapidly, and pressure 25～30MPa kept 10～15 minutes, made the helmet shell.
The manufacturing approach of bulletproof halmet of the present invention pressing process be divided into two the step accomplish, be respectively preformed operation and molding procedure.Owing in the preformed operation of above-mentioned steps (2), (3), adopted heating preforming tool and cooling preforming tool respectively; In the molding procedure of above-mentioned steps (5), (6), adopted hot briquetting mould and cooling forming mould respectively, can produce, reduced intensification, the temperature-fall period of mould with the continuous production stage of production line mode; The production efficiency of the helmet that not only improves; Shorten the production cycle, can also significantly reduce energy consumption, cut down finished cost.
Compared with prior art, the present invention has following advantage:
(1) the present invention is a material of main part owing to adopting PE not have latitude cloth, and the helmet of producing is in light weight, comfortable wearing.
(2) reinforcement material that covers of ectonexine shop further improves the integral rigidity of the helmet, and under the prerequisite that does not increase helmet weight, protective capacities is stronger, makes the bullet of bullet be easier to distortion, more penetrativity can not take place.
(3) reinforcement material that covers of ectonexine shop makes the helmet no longer need carry out complex surfaces to handle, strengthened the adhesive force that applies paint.
(4) the whole pressing process of the helmet is accomplished by preformed operation and molding procedure, uses hot pressing die and cold stamping die respectively, makes production efficiency improve 1 times at least, and has reduced energy consumption, has reduced processing cost.
The specific embodiment
Bulletproof halmet of the present invention is the inside and outside surperficial reinforcement material of spreading the high strength glass fiber fabric that covers heat of immersion solidity fluoropolymer resin that does not have the latitude cloth preformed helmet at PE, forms through hot pressing.The helmet of the present invention does not mainly have latitude cloth by PE and constitutes, and the PE of the high strength and modulus through certain number of plies does not have latitude cloth and carries out cutting according to the shape and the size of the required helmet, intersects neatly superimposed; The preformed of carrying out hot pressing and colding pressing then obtains the preformed helmet.
Wherein, according to the weight of the final helmet and the composite request of ballistic performance, the number of plies that preferred PE does not have latitude cloth is 28～33 layers.In hot pressing preformed process, preferably the temperature in the hot pressing preforming tool is warming up to 90～100 ℃, pressure is 5～10MPa, heat-insulation pressure keeping 5～10 minutes, thus the thermoplastic polymer resin that PE is not had in the latitude cloth is softening.Then, put into the preforming tool of colding pressing rapidly,, kept 5～10 minutes, make the helmet obtain preformed with the pressure of 5～10MPa.
Then, cover the reinforcement material of the high strength glass fiber fabric of heat of immersion solidity fluoropolymer resin in the surfaces externally and internally shop of the preformed helmet.The helmet that the shop is covered reinforcement material is put into heat pressing and molding mold, is warming up to 120～125 ℃, boosts to 25～30MPa, and constant temperature and pressure kept 10～15 minutes; Take out and put into the cold pressing forming mould cooling and shaping rapidly, pressure 25～30MPa kept 10～15 minutes, made the helmet shell.
High-intensity glass fabric among the present invention is the fabric that adopts high-intensity glass fibre to be made into.The characteristics of high-strength glass fibre are high strength, high-modulus, and its ultimate fibre tensile strength is 2800MPa, and are higher by about 25% than alkali-free glass fiber tensile strength, and elastic modelling quantity 86000MPa is higher than the intensity of E-glass fibre.Glass fabric is preferably plain weave, and the warp of this glass fabric, broadwise tension failure brute force be greater than 1600N/25mm, and density is preferably 150～200g/m
2
The thermosetting polymer resin that the high strength glass fiber fabric is flooded can be preferably epoxy resin for vinyl esters, unsaturated polyester (UP), epoxy resin or phenolic resin.The content of thermosetting polymer resin is preferably 30～35 weight % of reinforcement material.Can high strength glass fiber be knitted and impregnated in the thermosetting polymer resin, perhaps through modes such as brushing, sprayings with the whole surface of thermosetting polymer resin-coated in the high strength glass fiber fabric.
Existing bulletproof halmet normally covers the ballistic fiber woven fabric to carry out hot pressing and processes in inside and outside surface shop, and ballistic fiber woven fabric wherein is the fabric that adopts ballistic fiber to be made into, and ballistic fiber is exactly aramid fiber, PE fiber etc.Can prevent that PE from not having PE fiber stripped thread in the latitude cloth though cover the ballistic fiber woven fabric in helmet surface layer shop, product surface need pass through sandblast, scrape equality complex processing method just can reach requirement, and the adhesive force of surface-coated paint is little.Compare with existing bulletproof halmet, the present invention has following advantage:
(1) the present invention is a material of main part owing to adopting PE not have latitude cloth, and the helmet of producing is in light weight, comfortable wearing.
(2) reinforcement material that covers of ectonexine shop further improves the integral rigidity of the helmet, under the prerequisite that does not increase helmet weight, makes the bullet of bullet be easier to distortion, more penetrativity can not take place.
(3) reinforcement material that covers of ectonexine shop makes the helmet no longer need carry out complex surfaces to handle, strengthened the adhesive force that applies paint.
(4) the whole pressing process of the helmet is accomplished by preformed operation and molding procedure, uses hot pressing die and cold stamping die respectively, makes production efficiency improve 1 times at least, and has reduced energy consumption, has reduced processing cost.
Embodiment 1:
Will be by inspiring confidence in Thailand
32 layers of the preparation of board superhigh molecular weight polyethylene fibers are protected star
The board high performance PE does not have latitude cloth and carries out cutting according to the shape and the size of the required helmet, intersects neatly superimposed; Put into the hot pressing preforming tool, be warming up to 90 ℃, the thermoplastic resin polymer that pressure 10MPa, heat-insulation pressure keeping made PE not have in the latitude cloth in 10 minutes is softening; Take out and put into the preforming tool of colding pressing rapidly, pressure 10MPa kept 5 minutes, made the helmet obtain preformed; Cover epoxy resin content in the inside and outside surface shop of the preformed helmet and be the reinforcement material of 30% high strength glass fiber fabric, the fabric surface density is 175g/m
2Put into heat pressing and molding mold, be warming up to 123 ℃, boost to 28MPa, constant temperature and pressure kept 15 minutes; Take out and put into the cold pressing forming mould cooling and shaping rapidly, pressure 28MPa kept 10 minutes, made the helmet shell.After the simple process of surface, the spraying paint film.By this production method, per hour can suppress 3 top helmet shells, promptly suppressing 1 top helmet shell only needs 20 minutes.Simultaneously, the surface treatment of every top helmet shell only needs 3 minutes.
The helmet shell weight of the helmet that makes is 1.10Kg.
Embodiment 2:
Will be by inspiring confidence in Thailand
28 layers of the preparation of board superhigh molecular weight polyethylene fibers are protected star
The board high performance PE does not have latitude cloth and carries out cutting according to the shape and the size of the required helmet, intersects neatly superimposed; Put into the hot pressing preforming tool, be warming up to 95 ℃, the thermoplastic polymer resin that pressure 8MPa, heat-insulation pressure keeping made PE not have in the latitude cloth in 10 minutes is softening; Take out and put into the preforming tool of colding pressing rapidly, pressure 5MPa kept 10 minutes, made the helmet obtain preformed; Cover epoxy resin content in the inside and outside surface shop of the preformed helmet and be 30% high strength glass fiber fabric reinforcement material, the fabric surface density is 175g/m
2Put into heat pressing and molding mold, be warming up to 123 ℃, boost to 28MPa, constant temperature and pressure kept 15 minutes; Take out and put into the cold pressing forming mould cooling and shaping rapidly, pressure 28MPa kept 10 minutes, made the helmet shell.
The helmet shell weight of the helmet that makes is 1.07Kg.
Embodiment 3:
Will be by inspiring confidence in Thailand
32 layers of the preparation of board superhigh molecular weight polyethylene fibers are protected star
The board high performance PE does not have latitude cloth and carries out cutting according to the shape and the size of the required helmet, intersects neatly superimposed; Put into the hot pressing preforming tool, be warming up to 100 ℃, the thermoplastic polymer resin that pressure 5MPa, heat-insulation pressure keeping made PE not have in the latitude cloth in 10 minutes is softening; Take out and put into the preforming tool of colding pressing rapidly, pressure 10MPa kept 8 minutes, made the helmet obtain preformed; Cover epoxy resin content in the inside and outside surface shop of the preformed helmet and be 30% high strength glass fiber fabric reinforcement material, the fabric surface density is 175g/m
2Put into heat pressing and molding mold, be warming up to 123 ℃, boost to 28MPa, constant temperature and pressure kept 15 minutes; Take out and put into the cold pressing forming mould cooling and shaping rapidly, pressure 28MPa kept 10 minutes, made the helmet shell.
The helmet shell weight of the helmet that makes is 1.09Kg.
The contrast test mode
The comparative example A:
To protect star
board high performance PE by 32 layers that inspire confidence in the preparation of Thailand
board superhigh molecular weight polyethylene fibers does not have latitude cloth and carries out cutting according to the shape and the size of the required helmet, intersects neatly superimposed; Put into mould, be warming up to 95 ℃, pressure 10MPa, heat-insulation pressure keeping 10 minutes cools to 50 ℃ of die sinkings taking-up helmets then.The intensification of this process, cooling need 12 minutes respectively; The superhigh molecular weight polyethylene fibers fabric is covered in shop, inside and outside surface at the helmet; Put into mould, be warming up to 123 ℃, boost to 28MPa, constant temperature and pressure kept 15 minutes, cooled then to 50 ℃ of die sinkings, made the helmet shell.The intensification of this process, cooling need 20 minutes respectively.After the complex process of surface, the spraying paint film.By this production method, suppressing 1 top helmet shell needs about 50～55 minutes.Simultaneously, the surface treatment of every top helmet shell needs 12 minutes.
The helmet shell weight of the helmet that makes is 1.09Kg.
The result
(embodiment 1 and embodiment 2) carried out the live shell test to the helmet of the present invention, the helmet of the present invention (embodiment 3) carried out 1.1g simulation fragmentation V50 test and the helmet of the present invention (embodiment 1) and lateral rigidity, the paint film adhesion of the helmet of comparative example 1 are tested.
The helmet that the present invention produces is through detecting; The helmet of embodiment 1 is pressed the GA293-2001 standard; Supervised the detection of inspection center through China Arms Industry bulletproof device material amount; Can stop the penetrating of 51 formula 7.62mm pistol cartridges of China system 54 formula 7.62mm pistols emission, maximum shoot mark height is less than 11mm.The helmet of embodiment 2 is pressed the NIJ0106.01 standard and is detected through U.S. White laboratory, can stop penetrating of NIJIIIA.44Magnum bullet.The helmet of embodiment 3 through the detection of China Arms Industry bulletproof device material amount supervision inspection center, can be prevented 1.1g simulation fragmentation according to the MIL-STD-662F standard, and the V50 value is 680m/s, has reached America NI J standard and GJB.
Helmet lateral rigidity and the test of surperficial paint film adhesion are carried out according to GB 2812-89, GB/T1720 respectively.Rigidity and the paint film adhesion that test result shows the helmet of the present invention all be improved significantly.Test result is shown in table 1, table 2.
Table 1. lateral rigidity test result
| The helmet | Maximum deformation quantity (mm) | Residual deformation amount (mm) |
| Comparative example 1 | 37 | 13 |
| Embodiment 1 | 31 | 10.5 |
Table 2. paint film adhesion test result
| The helmet | Comparative example 1 | Embodiment 1 |
| The adhesive force grade | 2 | 4 |
Claims (10)
1. a bulletproof halmet is characterized in that, is the inside and outside surperficial reinforcement material of spreading the high strength glass fiber fabric that covers heat of immersion solidity fluoropolymer resin that does not have the latitude cloth preformed helmet at PE, forms through hot pressing.
2. bulletproof halmet according to claim 1 is characterized in that: the said thermosetting polymer resin content in the said reinforcement material is 30～35 weight %.
3. according to claim 1 or 2 said bulletproof halmets, it is characterized in that: said thermosetting polymer resin is at least a in vinyl esters, unsaturated polyester (UP), epoxy resin or the phenolic resin.
4. according to claim 1 or 2 said bulletproof halmets, it is characterized in that: said high strength glass fiber fabric is a plain weave, and warp, broadwise tension failure brute force are greater than 1600N/25mm, and density is preferably 150～200g/m
2
5. the manufacturing approach of a bulletproof halmet may further comprise the steps:
(1) 28～33 layers of PE is not had latitude cloth and carry out cutting, intersect neatly superimposed according to the shape and the size of the required helmet;
(2) put into the hot pressing preforming tool, be warming up to 90～100 ℃, the thermoplastic polymer resin that pressure 5～10MPa, heat-insulation pressure keeping made PE not have in the latitude cloth in 5～10 minutes is softening;
(3) preforming tool of colding pressing is put in taking-up rapidly, and pressure 5～10MPa kept 5～10 minutes, made the helmet obtain preformed;
(4) cover the reinforcement material of the high strength glass fiber fabric of heat of immersion solidity fluoropolymer resin in the surfaces externally and internally of preformed helmet shop;
(5) helmet that reinforcement material is covered in the shop is put into heat pressing and molding mold, is warming up to 120～125 ℃, boosts to 25～30MPa, and constant temperature and pressure kept 10～15 minutes;
(6) the cold pressing forming mould cooling and shaping is put in taking-up rapidly, and pressure 25～30MPa kept 10～15 minutes, made the helmet shell.
6. the manufacturing approach of bulletproof halmet according to claim 5, it is characterized in that: the said thermosetting polymer resin content in the said reinforcement material is 30～35 weight %.
7. according to the manufacturing approach of the said bulletproof halmet of claim 5, it is characterized in that: the preforming tool in above-mentioned steps (2), (3) is respectively heating preforming tool and cooling preforming tool.
8. according to the manufacturing approach of the said bulletproof halmet of claim 5, it is characterized in that: the mould in above-mentioned steps (5), (6) is respectively hot briquetting mould and cooling forming mould.
9. according to the manufacturing approach of claim 5 or 6 said bulletproof halmets, it is characterized in that: said thermosetting polymer resin is at least a in vinyl esters, unsaturated polyester (UP), epoxy resin or the phenolic resin.
10. according to the manufacturing approach of claim 5 or 6 said bulletproof halmets, it is characterized in that: said high strength glass fiber fabric is a plain weave, and warp, broadwise tension failure brute force are greater than 1600N/25mm, and density is preferably 150～200g/m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456532.2A CN102555353B (en) | 2011-12-30 | 2011-12-30 | The manufacture method of bulletproof halmet and the bulletproof halmet by its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456532.2A CN102555353B (en) | 2011-12-30 | 2011-12-30 | The manufacture method of bulletproof halmet and the bulletproof halmet by its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102555353A true CN102555353A (en) | 2012-07-11 |
| CN102555353B CN102555353B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110456532.2A Active CN102555353B (en) | 2011-12-30 | 2011-12-30 | The manufacture method of bulletproof halmet and the bulletproof halmet by its manufacture |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154819A (en) * | 2013-05-14 | 2014-11-19 | 北京同益中特种纤维技术开发有限公司 | Polyethylene composite bulletproof helmet |
| WO2014184407A1 (en) * | 2013-05-13 | 2014-11-20 | Fedur, S.A. | Fragment- and bullet-proof helmet |
| CN105066785A (en) * | 2015-08-28 | 2015-11-18 | 北京普凡防护科技有限公司 | Aramid fiber composite bulletproof helmet of special structural design and forming method of helmet |
| CN105216192A (en) * | 2015-09-07 | 2016-01-06 | 上海斯瑞科技有限公司 | A kind of bulletproof halmet and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193724A (en) * | 1997-03-18 | 1998-09-23 | 李郁忠 | Bulletproof halmet of composite material |
| CN101749984A (en) * | 2009-11-03 | 2010-06-23 | 湖南中泰特种装备有限责任公司 | Method for producing anti-fragmentation helmet from high-strength and high-modulus polyethylene laid fabric |
-
2011
- 2011-12-30 CN CN201110456532.2A patent/CN102555353B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193724A (en) * | 1997-03-18 | 1998-09-23 | 李郁忠 | Bulletproof halmet of composite material |
| CN101749984A (en) * | 2009-11-03 | 2010-06-23 | 湖南中泰特种装备有限责任公司 | Method for producing anti-fragmentation helmet from high-strength and high-modulus polyethylene laid fabric |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014184407A1 (en) * | 2013-05-13 | 2014-11-20 | Fedur, S.A. | Fragment- and bullet-proof helmet |
| CN104154819A (en) * | 2013-05-14 | 2014-11-19 | 北京同益中特种纤维技术开发有限公司 | Polyethylene composite bulletproof helmet |
| CN104154819B (en) * | 2013-05-14 | 2019-04-26 | 北京同益中新材料科技股份有限公司 | The polyethylene bulletproof composite helmet |
| CN105066785A (en) * | 2015-08-28 | 2015-11-18 | 北京普凡防护科技有限公司 | Aramid fiber composite bulletproof helmet of special structural design and forming method of helmet |
| CN105216192A (en) * | 2015-09-07 | 2016-01-06 | 上海斯瑞科技有限公司 | A kind of bulletproof halmet and preparation method thereof |
| CN105216192B (en) * | 2015-09-07 | 2018-03-27 | 上海斯瑞科技有限公司 | A kind of bulletproof halmet and preparation method thereof |
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|---|---|
| CN102555353B (en) | 2015-11-25 |
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