CN107328302B - A kind of energy-absorbing buffering bulletproof halmet liner and preparation method thereof - Google Patents
A kind of energy-absorbing buffering bulletproof halmet liner and preparation method thereof Download PDFInfo
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- CN107328302B CN107328302B CN201710798486.1A CN201710798486A CN107328302B CN 107328302 B CN107328302 B CN 107328302B CN 201710798486 A CN201710798486 A CN 201710798486A CN 107328302 B CN107328302 B CN 107328302B
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- foamed ceramics
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- foam metal
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 128
- 239000006260 foam Substances 0.000 claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000004964 aerogel Substances 0.000 claims abstract description 25
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 21
- 239000004411 aluminium Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000009715 pressure infiltration Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 171
- 230000000052 comparative effect Effects 0.000 description 11
- 230000006378 damage Effects 0.000 description 6
- 239000002320 enamel (paints) Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- -1 porosity 85% Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H1/00—Personal protection gear
- F41H1/04—Protection helmets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
A kind of energy-absorbing buffering bulletproof halmet liner, including open-celled ceramic layer, it further include foam metal layer and elastic aerogel layer, the open-celled ceramic layer includes the first foamed ceramics layer and the second foamed ceramics layer, the setting sequence of each layer is followed successively by foam metal layer, the first foamed ceramics layer, the second foamed ceramics layer, elastic aerogel layer from the outside to the core, polyamide resin layer is respectively equipped between adjacent layer, the aperture of the first foamed ceramics layer and thickness are all larger than the aperture of the second foamed ceramics layer；The thickness of the foam metal layer and elastic aerogel layer is 3~5mm, and the first foamed ceramics layer and the second foamed ceramics layer are all larger than 4mm.The present invention also provides a kind of preparation methods of above-mentioned energy-absorbing buffering bulletproof halmet liner.Product of the present invention can play the role of effective energy-absorbing buffering, and can effectively continuous absorption by repeat impact when stress wave.
Description
Technical field
The present invention relates to bulletproof halmet technical field, especially a kind of energy-absorbing buffering bulletproof halmet liner and its preparation side
Method.
Background technique
Currently, international and domestic anti-terrorism situation very severe, terrorist incident has hair when including the malignant events such as gunslinging and explosion
It is raw, seriously threaten the stable and the people's lives and property safety of society.Police protective gear, especially bulletproof halmet have become
One line of public security People's Armed Police refers to one of special duty's equipment of war personnel's indispensability.
Bulletproof halmet is a kind of individual soldier protection harness for injuring head from objects such as bullet or elastic slices, is public security
Frontier defense and security escort the Individual protection equitment of indispensability when equal personnel the environment such as threaten in face of bullet in the task that executes, always for
Various countries army and police are paid attention to.It can absorb, the kinetic energy of dissipation bullet, prevent to penetrate, effective protection head.
Although the helmet is by bullet impact however, existing bulletproof halmet can prevent the penetrability of bullet from injuring
After cannot effectively dissolve bullet kinetic energy, and then generate violent stress wave to head, be easy to cause pole to the brain of wearer
Big non-through damage.For this reason, it may be necessary to liner be arranged, inside bulletproof halmet to reduce injury of the stress wave to human body.So
And the energy-absorbing buffering of current bulletproof halmet liner is ineffective, and injury when can only weaken single-impact, and the helmet is received
It is very poor to buffering effect when bump.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of energy-absorbing buffering bulletproof halmet liner and its preparation sides
Method, can play the role of effective energy-absorbing buffering, and can effectively continuous absorption by repeat impact when stress wave.
The technical solution adopted by the present invention to solve the technical problems is:
Present invention firstly provides a kind of energy-absorbing buffering bulletproof halmet liners, including open-celled ceramic layer, further include foam metal
Layer and elastic aerogel layer, the open-celled ceramic layer include the first foamed ceramics layer and the second foamed ceramics layer, the setting of each layer
Sequence is followed successively by foam metal layer, the first foamed ceramics layer, the second foamed ceramics layer, elastic aerogel layer from the outside to the core, adjacent
It is respectively equipped with polyamide resin layer between layer, the aperture of the first foamed ceramics layer and thickness are all larger than the second foamed ceramics layer
Aperture；The thickness of the foam metal layer and elastic aerogel layer is 3~5mm, the first foamed ceramics layer and the second foam
Ceramic layer is all larger than 4mm.
Preferably, the foam metal layer be open cell foam metal aluminium, porosity be 80~90%, aperture be 1~
3mm。
Preferably, the aperture of the first foamed ceramics layer is 2~3.5mm.
Preferably, the aperture of the second foamed ceramics layer is 1.5~2mm.
Preferably, the first foamed ceramics layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
The present invention also provides a kind of preparation methods of above-mentioned energy-absorbing buffering bulletproof halmet liner, are made of following step:
(1) elastic aerogel layer, polyamide resin layer, the second foamed ceramics layer, polyamide resin layer, the first foam are made pottery
Enamel coating, polyamide resin layer, foam metal layer are sequentially loaded into Pressure Infiltration equipment, and pressure is then placed above foam metal layer
Power plate；
(2) 130~150 DEG C are heated to the speed of 5 DEG C/min and kept the temperature, applied by pressure plare of the inert gas to top layer
Add the pressure of 2~3MPa, and keep 10~15min of the pressure state, make a part of polyamide penetrate into portion disposed thereon and
In the structure sheaf of lower part, room temperature is then cooled to the furnace, obtain the energy-absorbing buffering bulletproof halmet liner.
The positive effect of the present invention: porous material has good energy absorption characteristics first, being capable of effective attenuation stress
Wave, secondly the present invention foamed aluminium is combined with foamed ceramics, be applied to bulletproof halmet ontology, bulletproof halmet ontology by
When to bullet impact, the centrality stress wave crushed foam aluminium instantaneously generated, foamed aluminium carries out just the stress wave that moment generates
Step absorbs and dispersion, then the first foamed ceramics layer by stress wave penetration when generate radial cracking, it is porous due to itself
The setting of the resin layer of characteristic and its bottom and elastic aerogel layer, so that radial cracking moment develops in the axial direction, at this time first
Foamed ceramics layer can generate partial crushing and consume energy, when again by bullet impact, if the position being hit and first
Secondary identical or be not much different, it is less to carry out the energy for being further crushed and absorbing for the broken segment of the first foamed ceramics layer at this time,
Stress wave can be transmitted to the second-time breakage absorption that the second foamed ceramics layer carries out energy.Key of the invention first is that the first foam
The aperture of ceramics is greater than the aperture of the second foamed ceramics, and the first foamed ceramics layer will become stress when otherwise being impacted for the first time
The transport layer of wave and directly to the second foamed ceramics layer generate destruction, this will be greatly reduced the energy-absorbing buffering performance of product；It is crucial
Second is that the necessity of foamed aluminium, if being not provided with foamed aluminium, the first foamed ceramics layer is easy to happen comprehensive powder after being impacted
Broken destruction, this can lose the continuous energy-absorbing function of product；Key third is that polyamide has to penetrate into the knot of upper and lower level
In structure layer, the two sides up and down of such porous material have the gap in certain thickness and are filled by polyamide, especially to foam
For ceramics, the radial tension that moment generates when foamed ceramics can be made to be impacted by the foamed ceramics that resin is filled is sent out in the axial direction
Exhibition, so that radial tension is reduced under the limit tension that it is able to bear, so that foamed ceramics be avoided to crush by globality
It destroys, then makes ceramic layer that there is the good ability for resisting next wave stress wave.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of liner described in embodiment 1 and embodiment 2.
Specific embodiment
With reference to the accompanying drawing to a preferred embodiment of the present invention will be described in detail.
Embodiment 1
Referring to Fig.1, the preferred embodiment of the present invention 1 provides a kind of energy-absorbing buffering bulletproof halmet liner, including open-celled ceramic layer,
It further include foam metal layer 1 and elastic aerogel layer 4, the open-celled ceramic layer includes the first foamed ceramics layer 2 and the second foam
The setting sequence of ceramic layer 3, each layer is followed successively by foam metal layer 1, the first foamed ceramics layer 2, the second foamed ceramics from the outside to the core
Layer 3, elastic aerogel layer 4, are respectively equipped with polyamide resin layer 5 between adjacent layer, the aperture of the first foamed ceramics layer 2 and
Thickness is all larger than aperture and the thickness of the second foamed ceramics layer 3；The thickness of the foam metal layer 1 and elastic aerogel layer 4 is equal
For 4mm, the thickness of the first foamed ceramics layer 2 and the second foamed ceramics layer 3 is all larger than 4mm.
The foam metal layer is open cell foam metal aluminium, porosity 85%, pore diameter range 3mm.
The aperture of the first foamed ceramics layer is 3mm.
The aperture of the second foamed ceramics layer is 2mm.
The first foamed ceramics layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
The present embodiment also provides the preparation method of above-mentioned energy-absorbing buffering bulletproof halmet liner, is made of following step:
(1) elastic aerogel layer, polyamide resin layer, the second foamed ceramics layer, polyamide resin layer, the first foam are made pottery
Enamel coating, polyamide resin layer, foam metal layer are sequentially loaded into Pressure Infiltration equipment, and pressure is then placed above foam metal layer
Power plate；
(2) 140 DEG C are heated to the speed of 5 DEG C/min and kept the temperature, applied by pressure plare of the inert gas to top layer
The pressure of 2.5MPa, and pressure state 12min is kept, so that a part of polyamide is penetrated into the knot in portion and lower part disposed thereon
In structure layer, room temperature is then cooled to the furnace, obtain the energy-absorbing buffering bulletproof halmet liner.
Embodiment 2
The preferred embodiment of the present invention 2 provides a kind of energy-absorbing buffering bulletproof halmet liner, including open-celled ceramic layer, further includes bubble
Foam metal layer 1 and elastic aerogel layer 4, the open-celled ceramic layer include the first foamed ceramics layer 2 and the second foamed ceramics layer 3,
The setting sequence of each layer is followed successively by foam metal layer 1, the first foamed ceramics layer 2, the second foamed ceramics layer 3, elasticity from the outside to the core
Aerogel layer 4 is respectively equipped with polyamide resin layer 5 between adjacent layer, and the aperture of the first foamed ceramics layer 2 and thickness are big
Aperture and thickness in the second foamed ceramics layer 3；The thickness of the foam metal layer 1 and elastic aerogel layer 4 is 5mm, the
The thickness of one foamed ceramics layer 2 and the second foamed ceramics layer 3 is all larger than 4mm.
The foam metal layer is open cell foam metal aluminium, porosity 90%, aperture 2mm.
The aperture of the first foamed ceramics layer is 3.2mm.
The aperture of the second foamed ceramics layer is 1.8mm.
The first foamed ceramics layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
Preparation method is same as Example 1.
Comparative example 1
Comparative example 1 is not provided with foam metal layer relative to embodiment 1, i.e. comparative example 1 provides a kind of anti-bullet of energy-absorbing buffering
Helmet liner, including open-celled ceramic layer further include elastic aerogel layer, and the open-celled ceramic layer includes the first foamed ceramics layer and the
Two foamed ceramics layers, the setting sequence of each layer are followed successively by the first foamed ceramics layer, the second foamed ceramics layer, elastic gas from the outside to the core
Gel layer is respectively equipped with polyamide resin layer between adjacent layer, and the aperture of the first foamed ceramics layer and thickness are all larger than
The aperture of two foamed ceramics layers and thickness；It is described elasticity aerogel layer with a thickness of 4mm, the first foamed ceramics layer and the second foam
The thickness of ceramic layer is all larger than 4mm.
The aperture of the first foamed ceramics layer is 3mm.
The aperture of the second foamed ceramics layer is 2mm.
The first foamed ceramics layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
The preparation method of above-mentioned energy-absorbing buffering bulletproof halmet liner, is made of following step:
(1) elastic aerogel layer, polyamide resin layer, the second foamed ceramics layer, polyamide resin layer, the first foam are made pottery
Enamel coating is sequentially loaded into Pressure Infiltration equipment, then the placement force plate above the first foamed ceramics layer；
(2) 140 DEG C are heated to the speed of 5 DEG C/min and kept the temperature, applied by pressure plare of the inert gas to top layer
The pressure of 2.5MPa, and pressure state 12min is kept, so that a part of polyamide is penetrated into the knot in portion and lower part disposed thereon
In structure layer, room temperature is then cooled to the furnace, obtain bulletproof halmet liner.
Comparative example 2
Comparative example 2 provides a kind of energy-absorbing buffering bulletproof halmet liner, identical as layer structure described in embodiment 1, including
Open-celled ceramic layer, further includes foam metal layer 1 and elastic aerogel layer 4, and the open-celled ceramic layer includes the first foamed ceramics layer 2
It is followed successively by foam metal layer 1, the first foamed ceramics layer 2, the from the outside to the core with the setting sequence of the second foamed ceramics layer 3, each layer
Two foamed ceramics layers 3, elastic aerogel layer 4 are respectively equipped with polyamide resin layer 5, first foamed ceramics between adjacent layer
The aperture of layer 2 and thickness are all larger than aperture and the thickness of the second foamed ceramics layer 3；The foam metal layer 1 and elastic aeroge
The thickness of layer 4 is 4mm, and the thickness of the first foamed ceramics layer 2 and the second foamed ceramics layer 3 is all larger than 4mm.
The foam metal layer is open cell foam metal aluminium, porosity 85%, pore diameter range 3mm.
The aperture of the first foamed ceramics layer is 3mm.
The aperture of the second foamed ceramics layer is 2mm.
The first foamed ceramics layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
The preparation method of above-mentioned energy-absorbing buffering bulletproof halmet liner, is made of following step:
By elastic aerogel layer, polyamide resin layer, the second foamed ceramics layer, polyamide resin layer, the first foamed ceramics
Layer, polyamide resin layer, foam metal layer pass sequentially through adhesive and are bonded together, and obtain non-infitration type bulletproof halmet liner.
Shock resistance test is carried out to the product of embodiment 1, embodiment 2, comparative example 1 and comparative example 2, is implemented when impacting for the first time
The broken area of first ceramic layer of example 1 and embodiment 2 is about 3cm2, the second ceramic layer is unbroken, the first ceramics of comparative example 1
The broken area of layer is about 8cm2, the second ceramic layer is unbroken, and the broken area of the first ceramic layer of comparative example 2 is about
10cm2, the second ceramic layer is by slight damage；When same position is impacted again, the first pottery of embodiment 1 and embodiment 2
The broken area of enamel coating is about 5cm2, the broken area of the second ceramic layer is about 2cm2, the first ceramic layer of comparative example 1 it is broken
Area is about 10cm2, the broken area of the second ceramic layer is about 6cm2, the broken area of the first ceramic layer of comparative example 2 is about
11cm2, it is about 8cm that the second ceramic layer, which is crushed area,2。
Product of the present invention can play the role of effective energy-absorbing buffering, and can effectively continuous absorption by repeat impact when
Stress wave.
It is above-described to be merely a preferred embodiment of the present invention, it should be understood that the explanation of above embodiments is only used
In facilitating the understanding of the method and its core concept of the invention, it is not intended to limit the scope of protection of the present invention, it is all of the invention
Any modification for being made within thought and principle, equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of energy-absorbing buffering bulletproof halmet liner, including open-celled ceramic layer, it is characterised in that: further include foam metal layer and bullet
Property aerogel layer, the open-celled ceramic layer include the first foamed ceramics layer and the second foamed ceramics layer, each layer setting sequence from
Foam metal layer, the first foamed ceramics layer, the second foamed ceramics layer, elastic aerogel layer are followed successively by outside to inside, between adjacent layer
It is respectively equipped with polyamide resin layer, the aperture of the first foamed ceramics layer and thickness are all larger than the aperture of the second foamed ceramics layer
And thickness；The thickness of the foam metal layer and elastic aerogel layer is 3~5mm, the first foamed ceramics layer and the second foam
The thickness of ceramic layer is all larger than 4mm.
2. a kind of energy-absorbing buffering bulletproof halmet liner according to claim 1, it is characterised in that: the foam metal layer is
Open cell foam metal aluminium, porosity are 80~90%, and aperture is 1~3mm.
3. a kind of energy-absorbing buffering bulletproof halmet liner according to claim 1, it is characterised in that: first foamed ceramics
The aperture of layer is 2~3.5mm.
4. a kind of energy-absorbing buffering bulletproof halmet liner according to claim 1, it is characterised in that: second foamed ceramics
The aperture of layer is 1.5~2mm.
5. a kind of energy-absorbing buffering bulletproof halmet liner according to claim 1, it is characterised in that: first foamed ceramics
Layer with a thickness of 7mm, the second foamed ceramics layer with a thickness of 5mm.
6. the preparation method of energy-absorbing buffering bulletproof halmet liner described in a kind of claim 1, is made of following step:
(1) by elastic aerogel layer, polyamide resin layer, the second foamed ceramics layer, polyamide resin layer, the first foamed ceramics
Layer, polyamide resin layer, foam metal layer are sequentially loaded into Pressure Infiltration equipment, then the placement force above foam metal layer
Plate；
(2) 130~150 DEG C are heated to the speed of 5 DEG C/min and kept the temperature, apply 2 by pressure plare of the inert gas to top layer
The pressure of~3MPa, and 10~15min of the pressure state is kept, so that a part of polyamide is penetrated into portion and lower part disposed thereon
Structure sheaf in, then cool to room temperature with the furnace, obtain the energy-absorbing buffering bulletproof halmet liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798486.1A CN107328302B (en) | 2017-09-07 | 2017-09-07 | A kind of energy-absorbing buffering bulletproof halmet liner and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798486.1A CN107328302B (en) | 2017-09-07 | 2017-09-07 | A kind of energy-absorbing buffering bulletproof halmet liner and preparation method thereof |
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| CN107328302A CN107328302A (en) | 2017-11-07 |
| CN107328302B true CN107328302B (en) | 2019-02-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106270B (en) * | 2018-10-26 | 2024-06-07 | 宁德新能源科技有限公司 | Multilayer sheet and battery |
| CN110145967B (en) * | 2019-04-19 | 2021-10-26 | 济南英维新材料科技合伙企业(有限合伙) | Hollow-out lining for bulletproof helmet and application thereof |
| CN110818944B (en) * | 2019-12-03 | 2020-08-11 | 浙江远景体育用品有限公司 | Buffering and energy-absorbing composite material for motorcycle helmet and preparation method thereof |
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| DE4206684A1 (en) * | 1992-03-04 | 1993-09-09 | Kalman Gyoery | Hydrodynamic shock absorbent lining for crash helmet - consists of prefabricated metal or plastic container filled with liquid and placed between helmet's shell and lining |
| DE19845916A1 (en) * | 1998-10-06 | 2000-04-13 | Juergen Gehrmann | Shock-absorbing helmet for protection of cyclist or motorcyclist against head injury is made of thick layer of open-pore metal foam |
| CN101827537A (en) * | 2008-07-02 | 2010-09-08 | 唐纳德·E·摩根 | A compressible liner for impact protection |
| CN103251162A (en) * | 2013-05-10 | 2013-08-21 | 北京航空航天大学 | Light safety helmet with novel micro-hole buffering layer structure |
| CN203457863U (en) * | 2013-06-25 | 2014-03-05 | 陕西盟创纳米新型材料股份有限公司 | Safety helmet |
| CN205456344U (en) * | 2016-01-22 | 2016-08-17 | 王众北 | Novel defence helmet |
| CN205537342U (en) * | 2016-01-22 | 2016-08-31 | 王众北 | Policeman is with armour of defending oneself |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07167593A (en) * | 1993-12-15 | 1995-07-04 | Sumitomo Bakelite Co Ltd | Bulletproof helmet |
| ITMI20071200A1 (en) * | 2007-06-14 | 2008-12-15 | Oto Melara Spa | REINFORCEMENT AND ARMORING PANEL FOR A VEHICLE |
| US20120204327A1 (en) * | 2011-02-14 | 2012-08-16 | Kinetica Inc. | Helmet design utilizing nanocomposites |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4206684A1 (en) * | 1992-03-04 | 1993-09-09 | Kalman Gyoery | Hydrodynamic shock absorbent lining for crash helmet - consists of prefabricated metal or plastic container filled with liquid and placed between helmet's shell and lining |
| DE19845916A1 (en) * | 1998-10-06 | 2000-04-13 | Juergen Gehrmann | Shock-absorbing helmet for protection of cyclist or motorcyclist against head injury is made of thick layer of open-pore metal foam |
| CN101827537A (en) * | 2008-07-02 | 2010-09-08 | 唐纳德·E·摩根 | A compressible liner for impact protection |
| CN103251162A (en) * | 2013-05-10 | 2013-08-21 | 北京航空航天大学 | Light safety helmet with novel micro-hole buffering layer structure |
| CN203457863U (en) * | 2013-06-25 | 2014-03-05 | 陕西盟创纳米新型材料股份有限公司 | Safety helmet |
| CN205456344U (en) * | 2016-01-22 | 2016-08-17 | 王众北 | Novel defence helmet |
| CN205537342U (en) * | 2016-01-22 | 2016-08-31 | 王众北 | Policeman is with armour of defending oneself |
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| Publication number | Publication date |
|---|---|
| CN107328302A (en) | 2017-11-07 |
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Denomination of invention: Energy-absorbing buffering ballistic helmet lining and preparation method thereof Effective date of registration: 20191218 Granted publication date: 20190212 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: Beijing Pufan Protection Technology Co.,Ltd. Registration number: Y2019990000749 |
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Denomination of invention: The invention relates to an energy absorbing buffer bulletproof helmet lining and a preparation method thereof Effective date of registration: 20210325 Granted publication date: 20190212 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING PUFAN PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2021990000268 |
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