CN203083442U - Bulletproof helmet - Google Patents
Bulletproof helmet Download PDFInfo
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- CN203083442U CN203083442U CN 201220674392 CN201220674392U CN203083442U CN 203083442 U CN203083442 U CN 203083442U CN 201220674392 CN201220674392 CN 201220674392 CN 201220674392 U CN201220674392 U CN 201220674392U CN 203083442 U CN203083442 U CN 203083442U
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- molecular weight
- weight polyethylene
- high molecular
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- helmet
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Abstract
The utility model discloses a bulletproof helmet comprising a helmet shell. The bulletproof helmet is characterized in that the helmet shell is formed by a plurality of layers of ultrahigh molecular weight polyethylene (UHMWPE) belt-type sheets through hot pressing or is formed by the UHMWPE belt-type sheets and UHMWPE non-woven cloths through the hot pressing. Due to the fact that content of matrix resin is less than 7wt%, UHMWPE is welded in the three-dimensional direction, and weak points of the UHMWPE are much fewer than those of the non-woven materials adhered to the matrix resin, bulletproof performance is stable. The bulletproof helmet is good in machinability, and a pressing temperature can be adjusted in a range between 130 DEG C and 145 DEG C. Meanwhile, rigidity of the helmet is good and side compression resistance is remarkably improved.
Description
Technical field
The utility model relates to a kind of bulletproof halmet, relates to a kind of with the hot-forming bulletproof halmet of ultra-high molecular weight polyethylene belt sheet material especially.
Background technology
Steel helmet is to use history at most, and a kind of bulletproof halmet that is still using now.Improvement to steel helmet is also being proceeded, as CN88201784U, CN2243641Y and the CN201488642U change to the steel helmet annex, to improve the comfortableness of dressing.Yet,, and when being attacked, have to cause that ricochet injures contiguous personnel's risk because the weight of steel helmet is big.So part market steel helmet is replaced by the bulletproof halmet that synthetic materials such as aramid fiber and ultrahigh molecular weight (UHMW) polyethylene are made gradually.
Patent CN1193724A and CN1181132A have introduced respectively with the woven cloth of aramid fiber, through impregnation, and the technology of the shop layer back compacting helmet.Matrix impregnation material mostly is thermosetting resins such as phenolic resins class or neoprene.Thereby the rigidity of the helmet of suppressing is better, hit by bullet after, the permanent deformation that stays on the helmet body (height of shoot mark or bulge and width) outline is smaller.Also just because of this, helmet distortion institute absorption bullet impact energy is few, can increase the risk that penetrates thus.
CN101820785A (WO2009/046979), CN101684990A, CN1515869A and CN1669766A have announced the method for manufacturing bulletproof halmet with ultra-high molecular weight polyethylene (or being called high-strength high-modulus polyethylene).The structure of superhigh molecular weight polyethylene material all is based on the material of unidirectional no latitude cloth, usually our said UD material.The no latitude cloth of this kind be by superhigh molecular weight polyethylene fibers through being arranged in parallel, refer to bondingly with the matrix tree, multilayer forms with 0-90 degree quadrature lamination again.Usually the content of matrix resin is used for binder fibre or fibrage, and is full of space therebetween at 8wt%～20wt%.Used matrix tree refers to be generally thermoplastic systems such as hexenoic acid, acrylic acid, polyurethane.
Ultra-high molecular weight polyethylene through the HTHP moulding, does not become the helmet body of rigidity after having latitude cloth shop layer.Press temperature has a significant impact the ballistic performance and the anti-bulge ability of the helmet.Temperature is too low, bonding not labor between layer and the layer.The too high restriction that is subjected to thermoplastic matrix resin and superhigh molecular weight polyethylene fibers self fusing point (144～147 ℃) again of temperature.The temperature of the compacting helmet generally can be above 130 ℃ between 120～125 ℃.
Adopt thermoplastic resin because ultra-high molecular weight polyethylene has the latitude cloth helmet, the rigidity of the helmet a little less than, impacted by bullet after, it is big that the width of the permanent deformation that stays on the helmet body, especially bulge is wanted.
The utility model content
The utility model discloses a kind of bulletproof halmet, comprise the helmet shell, its helmet shell is hot-forming or not have latitude cloth by multilayer ultra-high molecular weight polyethylene belt sheet material and ultra-high molecular weight polyethylene hot-forming by multilayer ultra-high molecular weight polyethylene belt sheet material.
The disclosed bulletproof halmet of the utility model with on the steel helmet profile and indistinction, also comprises chin belt and helmet top-hung extension system and forms structure.
In the disclosed preferred embodiment of the utility model, described High molecular weight polyethylene belt sheet material accounts for 20%～100% of helmet shell gross weight, and is preferred 25%～80%, and most preferably 30%～50%.
In the disclosed preferred embodiment of the utility model, described helmet shell is that multilayer ultra-high molecular weight polyethylene belt sheet material is hot-forming.
The used superhigh molecular weight polyethylene material of the utility model is not no latitude cloth structure, neither be made by superhigh molecular weight polyethylene fibers, but make by the ultra-high molecular weight polyethylene band and/or by the ultra-high molecular weight polyethylene belt sheet material that it is made.The width of ultra-high molecular weight polyethylene band is 2mm～500mm, preferred 50mm-200mm, and thickness is 0.01～0.1mm, preferred 0.02mm～0.1mm.
The employed ultra-high molecular weight polyethylene belt of the utility model sheet material can form by the braiding of ultra-high molecular weight polyethylene band quadrature is arranged.
The ultra-high molecular weight polyethylene belt sheet material of arranging for braiding, every two-layer ultra-high molecular weight polyethylene band quadrature is woven into a lamella, the staggered shop of the ultra-high molecular weight polyethylene strap layer of adjacent sheets layer descends with the ballistic performance of avoiding place, longitude and latitude crosspoint, as described in accompanying drawing 3.The ultra-high molecular weight polyethylene strap layer that described ultra-high molecular weight polyethylene belt sheet material is arranged by the braiding of 1-5 layer quadrature constitutes.Preferred 1-4 layer, most preferably 1-2 layer.
The employed ultra-high molecular weight polyethylene belt of the utility model sheet material also can be by pressing acquisition with the folk prescription of multilayer to the ultra-high molecular weight polyethylene strap of arranging layer by layer, and the ultra-high molecular weight polyethylene strap layer of adjacent layer becomes vertical direction shop layer in the sheet material with this strap layer.Described ultra-high molecular weight polyethylene belt sheet material is made of to the ultra-high molecular weight polyethylene strap layer of arranging 2-10 layer folk prescription.Preferred 2-8 layer, most preferably layer 2-4.
The width of the ultra-high molecular weight polyethylene belt sheet material that uses is 160cm ± 0.4cm, and length is 100～1000m, and the surface density of sheet material is 40～400g/m
2(reference thickness is 0.04～0.45mm), preferred 80～300g/m
2(reference thickness 0.08mm～0.35mm).
Described hot-forming be with behind the multilayer ultra-high molecular weight polyethylene belt sheet material shop layer, through the HTHP moulding.Preferably hot-forming, especially preferably hot-forming by 30-50 layer ultra-high molecular weight polyethylene belt sheet material by 20-60 layer ultra-high molecular weight polyethylene belt sheet material.The compacting of described high temperature is to be higher than 130 ℃ at DIE Temperature, is lower than between 147 ℃ of the melting temperatures of ultra-high molecular weight polyethylene, and the dwell time suppresses under 10～40 minutes condition and forms.Preferred press temperature is between 135～145 ℃, and the dwell time was at 15～25 minutes; Most preferably press temperature is between 138～142 ℃, and the dwell time was at 15～20 minutes.
In a preferred embodiment of the present utility model, described helmet thickness of the shell is preferably 7.0mm-10.0mm between 4.5mm～10.5mm, most preferably be 7.5mm-9.5mm, and this thickness is the thickness apart from 30mm place, helmet shell edge.
Bulletproof halmet disclosed in the utility model, its burster course comprises the matrix resin that is lower than 7wt%, preferably is lower than the matrix resin of 1wt%; Most preferably this burster course does not contain matrix resin.Usually matrix resin is used for bonding ultra-high molecular weight polyethylene band or superhigh molecular weight polyethylene fibers, and is full of the resin in space therebetween.Used matrix resin is generally thermoplastic systems such as hexenoic acid, acrylic acid, polyurethane.
The unidirectional no latitude cloth compacting helmet of existing so relatively ultra-high molecular weight polyethylene has the benefit of four aspects:
1) ballistic performance is good and stable: matrix resin content is lower than 7wt%, or does not contain matrix resin, all is weldings of polyethylene self on three-dimensional, and weak spot is less than the helmet with the bonding no latitude cloth material compacting of matrix resin greatly.
2) machinability is good.125 ℃ or 130 ℃ of the used pressing process ceiling temperatures of the helmet of no latitude cloth material compacting, above after the upper limit, ballistic performance declines to a great extent.Because the matrix resin content of ultra-high molecular weight polyethylene belt sheet material is low or do not contain matrix resin, the processing ceiling temperature can be increased near the fusing point, promptly 145 ℃, and the not obvious ballistic performance that has influence on the helmet.
3) helmet good rigidly.The helmet that the utility model compacting forms is not because of or contain very a spot of matrix resin, and rigidity is better, and the processing temperature height, is the welding between polyethylene and the polyethylene in the whole helmet shell, can significantly improve rigidity, especially the side direction compressive property of the helmet.The rigidity of the disclosed bulletproof halmet of the utility model, especially the side direction compressive property significantly improves, and satisfies the requirement of GA293-2001 lateral rigidity.Pressure for 450N time distortion tolerance less than 5mm.And ultra-high molecular weight polyethylene does not have the deflection of the helmet of latitude cloth compression moulding between 20～40mm under the equal conditions.
4) being subjected to bullet to impact the bump height that stays on the helmet body of back obviously reduces.The disclosed bulletproof halmet of the utility model is suppressed under higher temperature, and it is hit the back bump height and significantly improves.
The disclosed bulletproof halmet of the utility model, can guard against 54 pistol lead for retractable pencil bullets, 9mm Ba Labeimu bullet, the attack of .44 Magna nurse (Magnum) bullet, it is alert other with the judicial association (NIJ0108.01) of bulletproof halmet (GA293-2001) secondary or U.S. AAA level that protection level reaches China respectively.Protection level only arrives the II level in the NIJ0105.00 helmet standard.
Description of drawings
Fig. 1 is that ultra-high molecular weight polyethylene belt sheet material-monolithic layer weaves the schematic diagram of arranging.
Fig. 2 is that double-deck folk prescription is to the ultra-high molecular weight polyethylene belt sheet material schematic diagram of arranging.
The ultra-high molecular weight polyethylene belt sheet material schematic diagram that Fig. 3 arranges for the braiding of biplate layer.
The specific embodiment
1. spread 30 layers of ultra-high molecular weight polyethylene (PE) belt sheet material, this sheet material is arranged for the braiding of biplate layer, and peripheral cross recess is beneficial to evenly overlap at helmet periphery in the compacting.The PE belt sheet material of completing is put into die cavity, matched moulds, hot-forming.After the cooling, the helmet shell is taken out in die sinking.After the side cut, the heavy 950g of helmet shell is 8.5mm apart from 30mm place, helmet shell edge thickness.Speed with 436 ± 9m/s is tested with 9mm Ba Labeimu bullet, and five bullets are all guarded against.
2. spread 35 layers of ultra-high molecular weight polyethylene (PE) belt sheet material, this sheet material is arranged for the braiding of biplate layer, and drawing method is with embodiment 1.After the side cut, the heavy 1050g of helmet shell is 9.0mm apart from 30mm place, helmet shell edge thickness.
A) with the speed of 436 ± 9m/s with the test of 9mm Ba Labeimu bullet, five bullets are all guarded against, bump height is at～25mm.
B) the helmet shell, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 10～20mm, and average height is 13.0mm.
C) by the Stanag2920 of NATO standard, the V50 value of the 1.1g of helmet shell simulation fragmentation is 625m/s.
D) the helmet shell is pressed GB/T2812 method test lateral rigidity, maximum distortion is less than 5mm.
3. spread 35 layers of braiding ultra-high molecular weight polyethylene belt sheet material of arranging, this sheet material is arranged for the braiding of biplate layer, and peripheral cross recess is beneficial to evenly overlap at helmet periphery in the compacting.The belt sheet material of completing is put into die cavity, matched moulds, hot-forming.After the cooling, the helmet shell is taken out in die sinking.After the side cut, the heavy 1070g of helmet shell is 9.1mm apart from 30mm place, helmet shell edge thickness.
A) with the speed of 436 ± 9m/s with the test of 9mm Ba Labeimu bullet, five bullets are all guarded against, bump height is at～25mm.
B) helmet, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 8-16mm, and average height is 11mm.
4. spread 35 layers of folk prescription to the ultra-high molecular weight polyethylene belt sheet material of arranging, this sheet material is 4 lamella folk prescriptions to arranging, and peripheral cross recess is beneficial to evenly overlap at helmet periphery in the compacting.The belt sheet material of completing is put into die cavity, matched moulds, hot-forming.After the cooling, the helmet shell is taken out in die sinking.After the side cut, the heavy 1060g of helmet shell is 9.1mm apart from 30mm place, helmet shell edge thickness.
A) with the speed of 436 ± 9m/s with the test of 9mm Ba Labeimu bullet, five bullets are all guarded against, bump height is at～25mm.
B) helmet, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 8-15mm, and average height is 10.5mm.
C) helmet, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 8-16mm, and average height is 11mm.
5. Comparative Examples, ultra-high molecular weight polyethylene does not have 19 layers of latitude cloth, and peripheral cross recess is beneficial to evenly overlap at helmet periphery in the compacting.The no latitude cloth of completing is put into die cavity, matched moulds, hot-forming.After the cooling, the helmet shell is taken out in die sinking.After the side cut, the heavy 850g of helmet shell, the poly-30mm place, edge of helmet shell thickness is 8.1mm.
A) the helmet shell, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 9～20mm, and average height is 15.0mm.
B) by the Stanag2920 of NATO standard, the V50 value of the 1.1g of helmet shell simulation fragmentation is 680m/s.
C) the helmet shell is pressed GB/T2812 method test lateral rigidity, maximum distortion is 30mm
6. the ultra-high molecular weight polyethylene belt sheet material of 12 layers of braiding being arranged, as the extexine of helmet shell, this sheet material is arranged for the braiding of biplate layer, 14 layers of no latitude cloth shop are with internal layer, as the endosexine of helmet shell, peripheral cross recess is beneficial to evenly overlap at helmet periphery in the compacting.The sheet material of completing is put into die cavity, matched moulds, hot-forming.After the cooling, the helmet shell is taken out in die sinking.After the side cut, the heavy 880g of helmet shell.PE band percentage by weight is 30.The poly-30mm place, edge of helmet shell thickness is 8.3mm.
A) the helmet shell, is taken out after 3 hours-45 ℃ of following freezing processing, use the velocity test of 54 pistol lead for retractable pencil bullets with 445 ± 10m/s immediately, five bullets are all guarded against.After being hit, helmet bump height is between 9～20mm, and average height is 12.5mm.
B) by the Stanag2920 of NATO standard, the V50 value of the 1.1g of helmet shell simulation fragmentation is 650m/s.
C) the helmet shell is pressed GB/T2812 method test lateral rigidity, maximum distortion is 7mm.
7. the pressing process and the number of plies are with embodiment 1, and after helmet side cut was sprayed paint and loaded onto suspension, whole helmet weight was less than 1.4kg.
Claims (17)
1. a bulletproof halmet comprises the helmet shell, it is characterized in that, described helmet shell is by multilayer ultra-high molecular weight polyethylene belt sheet material or not have latitude cloth by multilayer ultra-high molecular weight polyethylene belt sheet material and ultra-high molecular weight polyethylene hot-forming.
2. bulletproof halmet according to claim 1 is characterized in that, the described helmet also comprises chin strap and the helmet top-hung is hung.
3. bulletproof halmet according to claim 1 and 2 is characterized in that, described helmet shell is that multilayer ultra-high molecular weight polyethylene belt sheet material is hot-forming.
4. bulletproof halmet according to claim 1 and 2 is characterized in that, the width of described ultra-high molecular weight polyethylene band is 2mm～500mm, and thickness is 0.01～1mm.
5. bulletproof halmet according to claim 4 is characterized in that, the width of described ultra-high molecular weight polyethylene band is 50mm～200mm, and thickness is 0.02mm～0.5mm.
6. bulletproof halmet according to claim 3 is characterized in that, described helmet shell is by 20-60, and preferred 30-50 layer ultra-high molecular weight polyethylene belt sheet material is hot-forming.
7. bulletproof halmet according to claim 6 is characterized in that, described ultra-high molecular weight polyethylene belt sheet material is that the quadrature braiding is arranged.
8. bulletproof halmet according to claim 7 is characterized in that, described ultra-high molecular weight polyethylene belt sheet material is to be made of 1-5 layer ultra-high molecular weight polyethylene strap layer, and the ultra-high molecular weight polyethylene strap layer of adjacent layer is staggered; Wherein said ultra-high molecular weight polyethylene strap layer is to be formed by two-layer ultra-high molecular weight polyethylene band quadrature braiding.
9. bulletproof halmet according to claim 6 is characterized in that, described ultra-high molecular weight polyethylene belt sheet material is that folk prescription is to arranging.
10. bulletproof halmet according to claim 9, it is characterized in that, described ultra-high molecular weight polyethylene belt sheet material is to be made of to arranging 2-10 layer ultra-high molecular weight polyethylene strap layer folk prescription, and adjacent ultra-high molecular weight polyethylene strap layer becomes vertical direction shop layer with this strap layer.
11. bulletproof halmet according to claim 1 is characterized in that, described ultra-high molecular weight polyethylene belt sheet material accounts for 20%～100% of helmet shell gross weight.
12. bulletproof halmet according to claim 11 is characterized in that, described ultra-high molecular weight polyethylene belt sheet material accounts for 25%～80% of helmet shell gross weight.
13. bulletproof halmet according to claim 1 is characterized in that, described helmet thickness of the shell is between 4.5mm～10.5mm, and this thickness is the thickness apart from 30mm place, helmet shell edge.
14., it is characterized in that described helmet shell weight is between 600～1200g according to the described bulletproof halmet of claim 1.
15. bulletproof halmet according to claim 1 is characterized in that, described burster course comprises the matrix resin that is lower than 7wt%.
16. bulletproof halmet according to claim 15 is characterized in that, described burster course comprises the matrix resin that is lower than 1wt%.
17. bulletproof halmet according to claim 16 is characterized in that, described burster course does not contain matrix resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674392 CN203083442U (en) | 2012-12-07 | 2012-12-07 | Bulletproof helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674392 CN203083442U (en) | 2012-12-07 | 2012-12-07 | Bulletproof helmet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203083442U true CN203083442U (en) | 2013-07-24 |
Family
ID=48829269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674392 Expired - Lifetime CN203083442U (en) | 2012-12-07 | 2012-12-07 | Bulletproof helmet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203083442U (en) |
-
2012
- 2012-12-07 CN CN 201220674392 patent/CN203083442U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |