CN110530207A - A kind of ultralight nonmetal bulletproof helmet - Google Patents
A kind of ultralight nonmetal bulletproof helmet Download PDFInfo
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- CN110530207A CN110530207A CN201910945383.2A CN201910945383A CN110530207A CN 110530207 A CN110530207 A CN 110530207A CN 201910945383 A CN201910945383 A CN 201910945383A CN 110530207 A CN110530207 A CN 110530207A
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- woven fabric
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- 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
- F41H1/08—Protection helmets of plastics; Plastic head-shields
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
The present invention relates to bulletproof halmet fields, specifically disclose a kind of ultralight nonmetal bulletproof helmet, including helmet helmet body, helmet helmet body includes aramid fiber machine-woven fabric layer, adhesive film and high-strength high-modulus polyethylene laminated cloth layer, adhesive film is between high-strength high-modulus polyethylene laminated cloth layer and aramid fiber machine-woven fabric layer, and aramid fiber machine-woven fabric layer, adhesive film and high-strength high-modulus polyethylene laminated cloth layer high temperature and pressure compression moulding.This programme can form a kind of ultralight nonmetal bulletproof helmet, to improve comfort of the wearer when wearing, reduce wearer's head and neck fatigue.
Description
Technical field
The invention belongs to bulletproof halmet fields, and in particular to a kind of ultralight nonmetal bulletproof helmet.
Background technique
The nonmetal bulletproof helmet of China's domestic production at present, it is shellproof for single aramid fiber or high-strength high-modulus polyethylene (PE)
Material is suppressed, when the 1951 formula 7.62mm pistol cartridges emitted using domestic 54 formula 7.62mm pistol are shot, helmet protection
Area is 0.13 ㎡, and after live shell test, though the helmet can guard against penetrating for bullet, its point of impact bump height exists substantially
Between 30mm~60mm, this bump height very likely allows the head of wearer to contact with the inner wall of the helmet, impact force
It can be directly delivered in wearer's head, for wearer, there are fatefulue injuries.
Existing nonmetal bulletproof helmet weight range is between 1400g~1500g simultaneously, although meeting the public peace of country
Whole industry standard and military standard, but appoint in actual use so and exist larger due to its weight and influence to wear for a long time
Comfort, make wearer because of the gravity compressing by the helmet, be easy to produce head and neck fatigue, be unfavorable for executing for a long time each
The needs of kind combat duty.
Summary of the invention
The invention is intended to provide a kind of ultralight nonmetal bulletproof helmet, to improve comfort of the wearer when wearing,
Reduce wearer's head and neck fatigue.
In order to achieve the above object, base case of the invention is as follows: a kind of ultralight nonmetal bulletproof helmet, including the helmet
Helmet body, helmet helmet body include aramid fiber machine-woven fabric layer, adhesive film and high-strength high-modulus polyethylene laminated cloth layer, and adhesive film is located at high-strength height
Between mode polyethylene laminated cloth layer and aramid fiber machine-woven fabric layer, and aramid fiber machine-woven fabric layer, adhesive film and high-strength high-modulus polyethylene are without latitude
Layer of cloth high temperature and pressure compression moulding.
The principle and its advantage of base case: aramid fiber machine-woven fabric layer is not only used in helmet helmet body, but also uses high-strength height
The density of mode polyethylene laminated cloth layer, aramid fiber machine-woven fabric layer is higher relative to high-strength high-modulus polyethylene laminated cloth layer, while it is anti-
Impact property is stronger；The shock resistance of high-strength high-modulus polyethylene laminated cloth layer is slightly weak relative to aramid fiber machine-woven fabric layer, but its
Density is lower, can effectively reduce the quality of entire helmet helmet body.
By being used in mixed way for aramid fiber machine-woven fabric layer and high-strength high-modulus polyethylene laminated cloth layer, helmet helmet body both ensure that
Ballistic performance, and the weight of entire helmet helmet body can be reduced, the comfort of helmet wearing can be improved, reduces the helmet to the pressure of human body
Compel, is convenient for wearing for a long time.
Adhesive film is provided between aramid fiber machine-woven fabric layer and high-strength high-modulus polyethylene laminated cloth layer simultaneously, when aramid fiber is woven
During high temperature and pressure compression moulding, adhesive film can be to virtue for layer of cloth, adhesive film and high-strength high-modulus polyethylene laminated cloth layer
Synthetic fibre machine-woven fabric layer and high-strength high-modulus polyethylene laminated cloth layer are bonded, and adhesive strength between the two is enhanced；Glue film simultaneously
For layer in the impact by bullet, the elasticity that glue film has can resist the impact force of bullet, promote the bullet-proof of helmet helmet body
Energy；The ability that the glue film of elasticity can have part to spring back after shock resistance simultaneously, can effectively reduce point of impact on helmet helmet body
Bump height, reduce the risk of injury of wearer, and have the function of damping.
Further, aramid fiber machine-woven fabric layer includes several layers aramid fiber woven fabric, and the dual coating of aramid fiber woven fabric has phenolic aldehyde tree
Rouge, the quality of phenolic resin are the 10.3-12.4% of aramid fiber woven fabric quality.
The coating of phenolic resin can promote intensity, hardness, impact resistance and the endurance of cutting of aramid fiber woven fabric, to improve
The ballistic performance of the nonmetal bulletproof helmet, and point of impact bump height is effectively reduced.
Further, high-strength high-modulus polyethylene laminated cloth layer includes several layers high-strength high-modulus polyethylene laminated cloth, high-strength and high-modulus
The single side of polythene weft-less cloth is coated with phenolic resin, and the quality of phenolic resin is the 9.4-10.2% of aramid fiber woven fabric quality.
The coating of phenolic resin can promote intensity, hardness, impact resistance and the resistant to shearing of high-strength high-modulus polyethylene laminated cloth
Property, to improve the ballistic performance of the nonmetal bulletproof helmet, further decrease point of impact bump height.
Further, phenolic resin is PVB phenol-formaldehyde resin modified, include mass fraction in PVB phenol-formaldehyde resin modified is 16-
19% phenolic resin, the PVB film resin of 6-8% and the industrial alcohol of 73-78%.
PVB film resin and phenolic resin can be allowed quickly to be added in industrial alcohol, and PVB film resin and phenolic aldehyde
The mixing of resin is rapidly and efficiently and uniformly；It is convenient for modified PVB phenol-formaldehyde resin modified being uniformly coated to aramid fiber machine simultaneously
In woven fabric and high-strength high-modulus polyethylene laminated cloth；During natural drying, dry speed is fast.
Further, aramid fiber machine-woven fabric layer includes the first aramid layers and the second aramid layers, high-strength high-modulus polyethylene laminated cloth layer
Between the first aramid layers and the second aramid layers, the first aramid layers, high-strength high-modulus polyethylene laminated cloth layer and the second aramid layers
By setting gradually helmet helmet body surface face in helmet helmet body.
High-strength high-modulus polyethylene laminated cloth layer is arranged between the first aramid layers and the second aramid layers, when carrying out shellproof,
Second aramid layers and second layer high-strength compound hot melt adhesive film are contacted with the bullet in device at first, the high aramid fiber machine-woven fabric layer of density
Play the role of shellproof, impact force is distributed on high-strength high-modulus polyethylene laminated cloth layer by the second aramid layers, high-strength high-modulus polyethylene
Laminated cloth layer can prevent helmet helmet body from being passed through by bullet, and the first aramid layers of internal layer can achieve the effect that damping.
Further, the first aramid layers include four layers of aramid fiber woven fabric, and the second aramid layers include two layers of aramid fiber woven fabric, and fragrant
The surface density of synthetic fibre woven fabric is 465g/ ㎡.
When helmet helmet body is impacted, the first aramid layers of four layers of aramid fiber woven fabric setting can be resisted effectively for human body
Impact, while reaching damping effect；Two layers of aramid fiber woven fabric is located at outside high-strength high-modulus polyethylene laminated cloth layer, due to its density compared with
Greatly, shock proof performance is very strong, can resist impact first for high-strength high-modulus polyethylene laminated cloth layer；While aramid fiber woven fabric
The setting of density can allow helmet helmet body to achieve the effect that loss of weight.
Further, high-strength high-modulus polyethylene laminated cloth layer includes 25-30 layers of high-strength high-modulus polyethylene laminated cloth, and high-strength height
The surface density of mode polyethylene laminated cloth is 145-158g/ ㎡.
The high-strength high-modulus polyethylene laminated cloth number of plies in high-strength high-modulus polyethylene laminated cloth layer has reached 25-30 layers, multilayer
The compacting of high-strength high-modulus polyethylene laminated cloth can effectively promote the intensity of high-strength high-modulus polyethylene laminated cloth layer, while corresponding
Density can effectively reduce the quality of entire helmet helmet body.
Further, adhesive film includes first layer high-strength compound hot melt adhesive film and second layer high-strength compound hot melt adhesive film, and first
Layer high-strength compound hot melt adhesive film is compressed between the first aramid layers and high-strength high-modulus polyethylene laminated cloth layer；Second layer high-strength compound
Hot melt adhesive film is compressed between the second aramid layers and high-strength high-modulus polyethylene laminated cloth layer.
First layer high-strength compound hot melt adhesive film and second layer high-strength compound hot melt adhesive film can be to the first aramid layers, high-strength and high-modulus
Polythene weft-less layer of cloth and the second aramid layers play firm bonding effect, while can play dual buffer function, can be into
The bump height for reducing point of impact on helmet helmet body of one step.
Further, aramid fiber woven fabric is rounded, and several first unfilled corners are evenly arranged on the circumference of aramid fiber woven fabric；It is high
Strong high-modulus polyethylene laminated cloth is rounded, and is evenly arranged with several second on the circumference of high-strength high-modulus polyethylene laminated cloth and lacks
Angle.
The first unfilled corner on aramid fiber woven fabric can guarantee mosaic not with split and then the cambered surface in fitting helmet helmet body surface face
Have an overlapping of multilayer aramid fiber woven fabric, it is at all levels between thickness it is uniform, convenient for being pressed into the first aramid layers and second
When aramid layers, each local thickness of the first aramid layers and the second aramid layers is uniform, and fitting is close；High-strength high-modulus polyethylene simultaneously
The setting of second unfilled corner also technical effect having the same in laminated cloth, convenient for fully playing bulletproof effect.
Further, when high temperature and pressure compression moulding, 125 ° -135 ° of forming temperature, briquetting pressure 7-9MPa, molding time
17-22min。
The selection of the molding parameter will not lose aramid fiber woven fabric and high-strength high-modulus polyethylene laminated cloth original intensity and
Modulus, and can be close to the minimum fusing point of high-strength high-modulus polyethylene laminated cloth in a short time, allow high-strength high-modulus polyethylene without latitude
Postadhesion is slightly melted together in cloth surface, and the hot pressing composite molding of two kinds of materials can be made to reach optimal ballistic performance and to drum
The control of packet height
Detailed description of the invention
Fig. 1 is a kind of partial sectional view of ultralight nonmetal bulletproof helmet main view direction of the embodiment of the present invention 1；
Fig. 2 is the enlarged drawing of aramid fiber woven fabric in a kind of ultralight nonmetal bulletproof helmet of the embodiment of the present invention 2；
Fig. 3 is that high-strength high-modulus polyethylene laminated cloth is put in a kind of ultralight nonmetal bulletproof helmet of the embodiment of the present invention 2
Big figure.
Specific embodiment
Below by the further details of explanation of specific embodiment:
Appended drawing reference in Figure of description includes: helmet helmet body 10, aramid fiber machine-woven fabric layer 20, the first aramid layers 201,
Two aramid layers 202, high-strength high-modulus polyethylene laminated cloth layer 30, adhesive film 40, first layer high-strength compound hot melt adhesive film 401, second
Layer high-strength compound hot melt adhesive film 402, aramid fiber woven fabric finished product 50, the first unfilled corner 501, the first joint-cutting 502, high-strength high-modulus polyethylene
Laminated cloth finished product 60, the second unfilled corner 601, the second joint-cutting 602.
Real embodiment 1
Embodiment 1 is substantially as shown in Fig. 1: a kind of ultralight nonmetal bulletproof helmet, including helmet helmet body 10, helmet helmet body
10 include aramid fiber machine-woven fabric layer 20, adhesive film 40 and high-strength high-modulus polyethylene laminated cloth layer 30, high-strength high-modulus polyethylene laminated cloth
Layer 30 includes 27 layers of high-strength high-modulus polyethylene laminated cloth.
Aramid fiber machine-woven fabric layer 20 includes the first aramid layers 201 and the second aramid layers 202, high-strength high-modulus polyethylene laminated cloth layer
Between the first aramid layers 201 and the second aramid layers 202, the first aramid layers 201,30 and of high-strength high-modulus polyethylene laminated cloth layer
Second aramid layers 202 are by setting gradually 10 surface of helmet helmet body in helmet helmet body 10；First aramid layers 201 include four layers of aramid fiber
Woven fabric, the second aramid layers 202 include two layers of aramid fiber woven fabric.
Adhesive film 40 include first layer high-strength compound hot melt adhesive film 401 and second layer high-strength compound hot melt adhesive film 402, first
Layer high-strength compound hot melt adhesive film 401 is compressed between the first aramid layers 201 and high-strength high-modulus polyethylene laminated cloth layer 30；The second layer
High-strength compound hot melt adhesive film 402 is compressed between the second aramid layers 202 and high-strength high-modulus polyethylene laminated cloth layer 30.
In production, the manufacturing process of helmet helmet body 10 is as follows, comprising the following steps:
(1) material prepares: preparing whole high-strength high-modulus polyethylene laminated cloth, aramid fiber woven fabric, first layer high-strength compound
Hot melt adhesive film 401 and second layer high-strength compound hot melt adhesive film 402；
(2) phenolic resin modified processing: preparing mass fraction is respectively 17% phenolic resin, 7% PVB film resin
With 76% industrial alcohol；The wherein model 2124 of phenolic resin, and the solid content in phenolic resin is 50%；By phenol
Urea formaldehyde, PVB film resin and industrial alcohol mixing, phenolic resin and PVB film resin are added in industrial alcohol, are formed
PVB phenol-formaldehyde resin modified；
(3) leaching material processing: the dual coating of PVB phenol-formaldehyde resin modified is carried out to the aramid fiber woven fabric in step (1), is formed
Aramid Prepreg makes the quality of PVB phenol-formaldehyde resin modified reach the 11.8% of aramid fiber woven fabric quality, then in a natural environment
It is dry, so that the surface density of Aramid Prepreg is reached 465g/ ㎡；High-strength high-modulus polyethylene laminated cloth in step (1) is carried out
The single side of PVB phenol-formaldehyde resin modified coats, and forms polyethylene prepreg；The quality of PVB phenol-formaldehyde resin modified is set to reach high-strength height
The 9.7% of mode polyethylene laminated cloth quality, is then dried in a natural environment, reaches the surface density of polyethylene prepreg
155g/ ㎡；
(4) blanking is handled: the Aramid Prepreg in step (3) is cut into the disk of 500mm, formed aramid fiber woven fabric at
Product；Polyethylene prepreg in step (3) is cut into the disk of 500mm, 0 forms high-strength high-modulus polyethylene laminated cloth finished product；
(5) laying is handled: it first selects four aramid fiber woven fabric finished products to be successively overlapped and is laid on a mould, this four aramid fiber machines
Woven fabric finished product forms the first aramid layers 201；Then first layer high-strength compound hot melt adhesive film 401 is routed to the first aramid layers 201
Upper surface on；Then 27 layers of high-strength high-modulus polyethylene laminated cloth finished product are successively overlapped and are laid on first layer high-strength compound hot melt
High-strength high-modulus polyethylene laminated cloth layer 30 is formd on glue film 401, and high-strength high-modulus polyethylene laminated cloth finished product changes coated with PVB
Property phenolic resin side and another piece of high-strength high-modulus polyethylene laminated cloth finished product be not coated with the side of PVB phenol-formaldehyde resin modified
Fitting；Then on the surface of high-strength high-modulus polyethylene laminated cloth layer 30, overlapping is laid with second layer high-strength compound hot melt adhesive film 402；So
Overlapping is laid with two layers of aramid fiber woven fabric finished product and forms the second aramid layers 202 on second layer high-strength compound hot melt adhesive film 402 afterwards；By
This forms preforming blank；
(6) hot pressing composite molding: it is hot-forming to blank progress preforming in step (5), 130 ° of forming temperature, molding
Pressure 8MPa, molding time 20min；The selection of the molding parameter will not lose aramid fiber woven fabric finished product and high-strength high-modulus polyethylene
Original intensity and modulus of laminated cloth finished product, and can be close to the most eutectic of high-strength high-modulus polyethylene laminated cloth in a short time
Point allows high-strength high-modulus polyethylene laminated cloth surface slightly to melt postadhesion together, can make the hot pressing composite molding of two kinds of materials
Reach optimal ballistic performance and the control to bump height.
Embodiment 2
Embodiment 2 difference from example 1 is that, embodiment 2 further includes substantially as shown in Fig. 2 and 3, aramid fiber
It is uniformly arranged on the circumference of woven fabric finished product 50 there are four the first unfilled corner 501, the central angle of the first unfilled corner 501 is that R1 is equal to 60
Degree, and radius is 110mm；And the second unfilled corner there are four being uniformly arranged on the circumference of high-strength high-modulus polyethylene laminated cloth finished product 60
601, the central angle of the first unfilled corner 501 is that R2 is equal to 60 degree, and radius is 110mm.
The first unfilled corner 501 dislocation on aramid fiber woven fabric finished product 50 in first aramid layers 201 is stacked, the second aramid fiber
Layer 202 in aramid fiber woven fabric finished product 50 on the first unfilled corner 501 dislocation is stacked, high-strength high-modulus polyethylene laminated cloth at
The second unfilled corner 601 dislocation on high-strength high-modulus polyethylene laminated cloth finished product 60 in product layer 30 is stacked.
Furthermore aramid fiber woven fabric finished product 50 is equipped with four the first joint-cuttings 502, one end of the first joint-cutting 502 and the first unfilled corner
501 the center point concurrent, the other end of the first joint-cutting 502 is opposite with the center point of outer aramid fiber woven fabric finished product 50, the first joint-cutting
502 length is 75-85mm, preferably 80mm；High-strength high-modulus polyethylene laminated cloth finished product 60 is equipped with four the second joint-cuttings simultaneously
602, the center point concurrent of one end of the second joint-cutting 602 and the second unfilled corner 601, the other end of the second joint-cutting 602 and outer aramid fiber machine
The center point of woven fabric finished product 50 is opposite, and the length of the second joint-cutting 602 is 75-85mm, preferably 80mm.
Light-duty bulletproof halmet in the present embodiment has following difference in production compared with Example 1, in step (4)
Blanking treatment process in, formed to aramid fiber woven fabric finished product 50 after, to aramid fiber woven fabric finished product 5 carry out the first unfilled corner 501
Excision, while at the first unfilled corner 501 of aramid fiber woven fabric finished product 50 carry out the first joint-cutting 502 cutting；Simultaneously to high-strength
High-modulus polyethylene laminated cloth finished product 60 carries out the excision of the second unfilled corner 601, while to high-strength high-modulus polyethylene laminated cloth finished product 60
The second unfilled corner 601 at carry out the second joint-cutting 602 cutting.
In the laying processing of step (5), the aramid fiber woven fabric finished product 50 of single layer is stacked 201 He of the first aramid layers
When the second aramid layers 202, the circumference profile weight of the aramid fiber woven fabric finished product 50 in the first aramid layers 201 and the second aramid layers 202
It closes, but the first unfilled corner 501 on four layers of aramid fiber woven fabric finished product 50 shifts to install, and with 20 ° every layer cumulative rotation layings, to reach
Preforming uniformly, the effect of no weak spot to material；The setting of first unfilled corner 501 is convenient for the first aramid layers 201 and the second virtue
202 pressed sizing of synthetic fibre layer is 10 shape of helmet helmet body, and the part of 10 shape of helmet helmet body does not have blocked up fold；It first cuts simultaneously
The setting of seam 502 is also convenient for the midline of aramid fiber woven fabric finished product 50 as the surface radian of helmet helmet body 10 changes, and avoids office
Portion's fold is rough.Simultaneously because shifting to install, the impact resistance at the first unfilled corner 501 can be enhanced, allow 501 He of the first unfilled corner
Impact resistance at second unfilled corner 601 is not influenced by unfilled corner.
When high-strength high-modulus polyethylene laminated cloth layer 30 is made in the high-strength high-modulus polyethylene laminated cloth finished product 60 of single layer simultaneously,
The circumference profile of high-strength high-modulus polyethylene laminated cloth finished product 60 in high-strength high-modulus polyethylene laminated cloth finished layer 30 is overlapped, but 27
The second unfilled corner 601 on layer aramid fiber woven fabric finished product 50 shifts to install, and with 20 ° every layer cumulative rotation layings；Herein second
Unfilled corner 601 and the second joint-cutting 602 and the first unfilled corner 501 and the first joint-cutting 502 have same effect and effect.
Claims (10)
1. a kind of ultralight nonmetal bulletproof helmet, including helmet helmet body, which is characterized in that the helmet helmet body includes that aramid fiber is woven
Layer of cloth, adhesive film and high-strength high-modulus polyethylene laminated cloth layer, the adhesive film are located at high-strength high-modulus polyethylene laminated cloth layer and virtue
Between synthetic fibre machine-woven fabric layer, and aramid fiber machine-woven fabric layer, adhesive film and high-strength high-modulus polyethylene laminated cloth layer high temperature and pressure compression moulding.
2. a kind of ultralight nonmetal bulletproof helmet according to claim 1, which is characterized in that the aramid fiber machine-woven fabric layer packet
Several layers aramid fiber woven fabric is included, the dual coating of aramid fiber woven fabric has phenolic resin, and the quality of the phenolic resin is aramid fiber machine
The 10.3-12.4% of woven fabric quality.
3. a kind of ultralight nonmetal bulletproof helmet according to claim 2, which is characterized in that the high-strength high-modulus polyethylene
Laminated cloth layer includes several layers high-strength high-modulus polyethylene laminated cloth, and the single side of high-strength high-modulus polyethylene laminated cloth is coated with phenolic aldehyde tree
Rouge, the quality of the phenolic resin are the 9.4-10.2% of aramid fiber woven fabric quality.
4. a kind of ultralight nonmetal bulletproof helmet according to claim 3, which is characterized in that the phenolic resin is PVB
Phenol-formaldehyde resin modified, the PVB film resin of phenolic resin, 6-8% in the PVB phenol-formaldehyde resin modified including 16-19% and
The industrial alcohol of 73-78%.
5. a kind of ultralight nonmetal bulletproof helmet according to claim 3, which is characterized in that the aramid fiber machine-woven fabric layer packet
Include the first aramid layers and the second aramid layers, high-strength high-modulus polyethylene laminated cloth layer be located at the first aramid layers and the second aramid layers it
Between, first aramid layers, high-strength high-modulus polyethylene laminated cloth layer and the second aramid layers in helmet helmet body by setting gradually to the end
Helmet helmet body surface face.
6. a kind of ultralight nonmetal bulletproof helmet according to claim 5, which is characterized in that first aramid layers include
Four layers of aramid fiber woven fabric, the second aramid layers include two layers of aramid fiber woven fabric, and the surface density of aramid fiber woven fabric is 465g/ ㎡.
7. a kind of ultralight nonmetal bulletproof helmet according to claim 6, which is characterized in that the high-strength high-modulus polyethylene
Laminated cloth layer includes 25-30 layers of high-strength high-modulus polyethylene laminated cloth, and the surface density of high-strength high-modulus polyethylene laminated cloth is 145-
158g/㎡。
8. a kind of ultralight nonmetal bulletproof helmet according to claim 7, which is characterized in that the adhesive film includes first
Layer high-strength compound hot melt adhesive film and second layer high-strength compound hot melt adhesive film, the first layer high-strength compound hot melt adhesive film are compressed on the
Between one aramid layers and high-strength high-modulus polyethylene laminated cloth layer；The second layer high-strength compound hot melt adhesive film is compressed on the second aramid fiber
Between layer and high-strength high-modulus polyethylene laminated cloth layer.
9. a kind of ultralight nonmetal bulletproof helmet according to claim 8, which is characterized in that the aramid fiber woven fabric is in circle
Shape, and several first unfilled corners are evenly arranged on the circumference of aramid fiber woven fabric；The high-strength high-modulus polyethylene laminated cloth is rounded,
And several second unfilled corners are evenly arranged on the circumference of high-strength high-modulus polyethylene laminated cloth.
10. a kind of ultralight nonmetal bulletproof helmet according to claim 9, which is characterized in that high temperature and pressure compression moulding
When, 125 ° -135 ° of forming temperature, briquetting pressure 7-9MPa, molding time 17-22min.
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|---|---|---|---|---|
| CN112428630A (en) * | 2020-11-17 | 2021-03-02 | 军事科学院系统工程研究院军需工程技术研究所 | Bulletproof helmet body and preparation method thereof |
| CN112428630B (en) * | 2020-11-17 | 2023-09-12 | 军事科学院系统工程研究院军需工程技术研究所 | Bulletproof helmet body and preparation method thereof |
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Application publication date: 20191203 |
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