CN116718076A - Aramid fiber composite polyethylene bulletproof helmet and preparation method thereof - Google Patents
Aramid fiber composite polyethylene bulletproof helmet and preparation method thereof Download PDFInfo
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- CN116718076A CN116718076A CN202310656987.1A CN202310656987A CN116718076A CN 116718076 A CN116718076 A CN 116718076A CN 202310656987 A CN202310656987 A CN 202310656987A CN 116718076 A CN116718076 A CN 116718076A
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- helmet
- aramid
- cloth
- bulletproof
- pressure
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/02—Deburring or deflashing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Helmets And Other Head Coverings (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses an aramid fiber composite polyethylene bulletproof helmet and a preparation method thereof, and solves the technical problems that the aramid fiber composite bulletproof helmet in the prior art can meet the requirement of bulletproof performance, but has higher manufacturing cost and is not suitable for a large amount of equipment of armies. The helmet comprises an outer helmet shell, an inner helmet shell and an external coating; the outer helmet shell is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell is formed by pressing a plurality of layers of dipped aramid woven fabrics; the density of the polyethylene fiber laid fabric surface is 70-100 g/square meter, and the density of the gum dipping aramid fiber laid fabric surface is 300-420 g/square meter. The bulletproof helmet can effectively reduce the height of bulges generated on the inner side of the helmet after bullets are shot, and reduce the damage to the head of a user; the number of layers penetrated by bullets is effectively reduced, the safety of the helmet is improved, and the manufacturing cost of the bulletproof helmet is comprehensively reduced.
Description
Technical Field
The invention relates to a bulletproof helmet and a preparation method thereof, in particular to an aramid fiber composite polyethylene bulletproof helmet and a preparation method thereof.
Background
The bulletproof helmet is protective equipment for individual combat, has the most direct protective effect on the penetration injury of the bullets of the individual heads, and can absorb and dissipate the energy of the bullets, prevent penetration, relieve blunt injury and effectively protect the heads of human bodies.
Light bulletproof helmets can be divided into two categories, namely aramid composite helmets and Polyethylene (PE) composite helmets. The preparation method adopts the following production process: firstly, cutting Polyethylene (PE) or aramid laid cloth according to a set shape; then stacking the cut pieces, and staggering a certain angle between each layer of cut pieces; and (5) hot-press molding the finally laid bulletproof helmet blank by adopting a mold.
Compared with the aramid composite helmet or the polyethylene composite helmet, the polyethylene composite helmet has the advantage of low price, but has high helmet shell thickness and large dynamic recess, and is difficult to meet the performance index requirements of the bulletproof helmet; the aramid composite helmet has the advantages of low helmet shell thickness, small dynamic recess, excellent high temperature resistance and rigidity, but the manufacturing cost of the aramid composite helmet is high in general, and the aramid composite helmet is not suitable for mass production and army equipment.
Disclosure of Invention
The invention aims to provide an aramid fiber composite polyethylene bulletproof helmet and a preparation method thereof, which are used for solving the technical problems that the aramid fiber composite bulletproof helmet in the prior art can meet the requirement of bulletproof performance, but has higher manufacturing cost and is not suitable for a large amount of equipment of armies.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides an aramid fiber composite polyethylene bulletproof helmet, which is characterized in that: comprises an outer helmet shell, an inner helmet shell and an external coating; the outer helmet shell is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell is formed by pressing a plurality of layers of dipped aramid woven fabrics; the outer coating is made of an acrylic nanocomposite.
Further, the cloth surface density of the ultra-high molecular weight polyethylene fiber laid cloth is 70-100 g/square meter, and the cloth surface density of the gum dipping aramid fiber woven cloth is 300-420 g/square meter.
Further, the number of layers of the ultra-high molecular weight polyethylene fiber laid fabric is 38-60.
Further, the number of layers of the gum dipping aramid woven cloth is 10-15.
The invention provides a preparation method of an aramid fiber composite polyethylene bulletproof helmet, which comprises the following steps:
s1, cutting a cloth piece: cutting each layer of gummed aramid woven cloth and ultra-high molecular weight polyethylene fiber weft-free cloth according to a pattern;
s2, laying: firstly, laying and overlapping the multi-layer gummed aramid fiber woven cloth on a convex mould of the helmet layer by layer in a staggered way, and then continuously overlapping and overlapping the multi-layer ultra-high molecular weight polyethylene fiber laid cloth in the staggered way;
s3, prepressing and forming: starting a hydraulic press to pre-press and mold the device paved in the step S2;
s4, pruning: cutting off the peripheral excess materials of the helmet shell after the pre-pressing and forming in the step S3 along a die line by using a cloth cutting machine with a knife to obtain a helmet shell blank;
s5, vacuum sealing: putting the helmet shell blank obtained in the step S4 into a static pressure female die, sealing and packaging the helmet shell blank by using a sealing bag, and vacuumizing;
s6, isothermal static pressure: immersing the helmet and the model subjected to vacuum pumping in the step S5 into a pressure cylinder of an isothermal static pressure machine for isothermal static pressure composite molding;
s7, finishing and painting: and (3) removing the helmet subjected to isothermal static pressure treatment in the step (S6) from the static pressure female die, further grinding the edge of the helmet in order, and uniformly spraying paint on the inner surface and the outer surface of the bulletproof helmet.
Further, the pre-pressing molding temperature in the step S3 is 60+/-5 ℃, the pressure is 10 MPa+/-2 MPa, and the pre-pressing is carried out for 55-60 min without changing the temperature and the pressure.
Further, the isothermal static pressure composite molding in the step S6 specifically comprises the following steps: gradually heating the medium in the pressure cylinder to 115-120 ℃, then boosting to 22MPa plus or minus 2MPa, keeping the temperature and pressure stable, pressing for 55-60 min, keeping the pressure stable, starting to cool the medium to 50 ℃, removing the pressure in the cylinder, and taking out the helmet and the model.
Further, the gum dipping aramid woven fabric is obtained by twisting warp yarns and weft yarns, weaving to obtain woven fabric, and then treating the obtained aramid woven fabric through a gum dipping process.
Based on the technical scheme, the embodiment of the invention at least has the following technical effects:
the bulletproof helmet and the preparation method thereof provided by the invention can greatly reduce the production and manufacturing cost of the bulletproof helmet and meet the requirement of armies on a large amount of equipment under the conditions of meeting the requirement of bulletproof performance and reducing dynamic recess. The bulletproof helmet is characterized in that the inner layer of the bulletproof helmet adopts gumming aramid woven cloth, the outer layer of the bulletproof helmet adopts ultra-high molecular weight polyethylene fiber non-woven cloth, and the bulletproof helmet manufactured by adopting the structural design and the process fully plays the high strength and the composite property of the gumming aramid woven cloth and the ultra-high molecular weight polyethylene fiber non-woven cloth. In terms of strength, the bulletproof helmet can effectively reduce the height of bulges generated on the inner side of the helmet after bullets are shot, and reduce the damage to the head of a user; the number of layers penetrated by bullets is effectively reduced, and the safety of the helmet is improved; in the aspect of price and cost, the ultra-high molecular weight polyethylene fiber weftless fabric is used, so that the production cost of the bulletproof helmet is greatly reduced on the premise of ensuring the strength of the bulletproof helmet, and the bulletproof helmet has higher economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a step schematic diagram of step S2 of the present invention;
fig. 3 is a step schematic diagram of step S6 of the present invention.
In the figure: 1. an outer shell; 2. an inner helmet shell; 3. and (5) surface coating.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
The aim of the invention is realized by the following technical scheme:
example 1
1.1 selection of materials
The invention provides an aramid fiber composite polyethylene bulletproof helmet which comprises an outer helmet shell 1, an inner helmet shell 2 and an outer coating 3; the outer helmet shell 1 is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell 2 is formed by pressing a plurality of layers of dipped aramid woven fabrics; the outer coating 3 is made of an acrylic nanocomposite. The density of the polyethylene fiber laid fabric surface is 85 g/square meter, and the density of the gum dipping aramid fiber laid fabric surface is 360 g/square meter.
1.2 preparation steps
The invention provides a preparation method of an aramid fiber composite polyethylene bulletproof helmet, which comprises the following preparation steps:
s1, cutting a cloth piece: cutting each layer of gummed aramid woven cloth and ultra-high molecular weight polyethylene fiber weft-free cloth according to a pattern;
s2, laying: firstly, laying and overlapping the multi-layer gummed aramid fiber woven cloth on a convex mould of the helmet layer by layer in a staggered way, and then continuously overlapping and overlapping the multi-layer ultra-high molecular weight polyethylene fiber laid cloth in the staggered way; the number of layers of the gummed aramid woven cloth is 15, and the number of layers of the ultra-high molecular weight polyethylene fiber laid cloth is 38;
s3, prepressing and forming: starting a hydraulic press to perform pre-press forming on the paved device in the step S2, wherein the pre-press forming temperature in the step S3 is 60 ℃, the pressure is 10MPaMPa, and the pressing is performed for 57min without changing the temperature and the pressure;
s4, pruning: cutting off the peripheral excess materials of the helmet shell after the pre-pressing and forming in the step S3 along a die line by using a cloth cutting machine with a knife to obtain a helmet shell blank;
s5, vacuum sealing: putting the helmet shell blank obtained in the step S4 into a static pressure female die, sealing and packaging the helmet shell blank by using a sealing bag, and vacuumizing;
s6, isothermal static pressure: immersing the helmet and the model subjected to vacuum pumping in the step S5 into a pressure cylinder of an isothermal static press for isothermal static pressure composite molding, wherein the isothermal static pressure composite molding specifically comprises the following steps of: gradually heating the medium in the pressure cylinder to 116 ℃, then raising the pressure to 22MPaMpa, keeping the temperature and the pressure stable, pressing for 57min, keeping the pressure stable, starting to cool the medium to 50 ℃, removing the pressure in the cylinder, and taking out the helmet and the model;
s7, finishing and painting: and (3) removing the helmet subjected to isothermal static pressure treatment in the step (S6) from the static pressure female die, further grinding the edge of the helmet in order, and uniformly spraying paint on the inner surface and the outer surface of the bulletproof helmet.
Example 2
2.1 selection of materials
The invention provides an aramid fiber composite polyethylene bulletproof helmet which comprises an outer helmet shell 1, an inner helmet shell 2 and an outer coating 3; the outer helmet shell 1 is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell 2 is formed by pressing a plurality of layers of dipped aramid woven fabrics; the outer coating 3 is made of an acrylic nanocomposite. The density of the polyethylene fiber laid fabric surface is 70 g/square meter, and the density of the gum dipping aramid fiber laid fabric surface is 300 g/square meter.
2.2 preparation step
The invention provides a preparation method of an aramid fiber composite polyethylene bulletproof helmet, which comprises the following preparation steps:
s1, cutting a cloth piece: cutting each layer of gummed aramid woven cloth and ultra-high molecular weight polyethylene fiber weft-free cloth according to a pattern;
s2, laying: firstly, laying and overlapping the multi-layer gummed aramid fiber woven cloth on a convex mould of the helmet layer by layer in a staggered way, and then continuously overlapping and overlapping the multi-layer ultra-high molecular weight polyethylene fiber laid cloth in the staggered way; the number of layers of the gum dipping aramid woven cloth is 13, and the number of layers of the ultra-high molecular weight polyethylene fiber laid cloth is 46;
s3, prepressing and forming: starting a hydraulic press to perform pre-press forming on the paved device in the step S2, wherein the pre-press forming temperature in the step S3 is 55 ℃, the pressure is 8MPa, and the temperature and the pressure are kept unchanged and are pressed for 55min;
s4, pruning: cutting off the peripheral excess materials of the helmet shell after the pre-pressing and forming in the step S3 along a die line by using a cloth cutting machine with a knife to obtain a helmet shell blank;
s5, vacuum sealing: putting the helmet shell blank obtained in the step S4 into a static pressure female die, sealing and packaging the helmet shell blank by using a sealing bag, and vacuumizing;
s6, isothermal static pressure: immersing the helmet and the model subjected to vacuum pumping in the step S5 into a pressure cylinder of an isothermal static press for isothermal static pressure composite molding, wherein the isothermal static pressure composite molding specifically comprises the following steps of: gradually heating the medium in the pressure cylinder to 115 ℃, then raising the pressure to 20Mpa, keeping the temperature and the pressure stable and pressing for 55min, keeping the pressure stable, starting to cool the medium to 50 ℃, removing the pressure in the cylinder, and taking out the helmet and the model;
s7, finishing and painting: and (3) removing the helmet subjected to isothermal static pressure treatment in the step (S6) from the static pressure female die, further grinding the edge of the helmet in order, and uniformly spraying paint on the inner surface and the outer surface of the bulletproof helmet.
Example 3
3.1 selection of materials
The invention provides an aramid fiber composite polyethylene bulletproof helmet which comprises an outer helmet shell 1, an inner helmet shell 2 and an outer coating 3; the outer helmet shell 1 is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell 2 is formed by pressing a plurality of layers of dipped aramid woven fabrics; the outer coating 3 is made of an acrylic nanocomposite. The density of the polyethylene fiber laid fabric surface is 100 g/square meter, and the density of the gum dipping aramid fiber laid fabric surface is 420 g/square meter.
3.2 preparation step
The invention provides a preparation method of an aramid fiber composite polyethylene bulletproof helmet, which comprises the following preparation steps:
s1, cutting a cloth piece: cutting each layer of gummed aramid woven cloth and ultra-high molecular weight polyethylene fiber weft-free cloth according to a pattern;
s2, laying: firstly, laying and overlapping the multi-layer gummed aramid fiber woven cloth on a convex mould of the helmet layer by layer in a staggered way, and then continuously overlapping and overlapping the multi-layer ultra-high molecular weight polyethylene fiber laid cloth in the staggered way; the number of layers of the gum dipping aramid woven cloth is 10, and the number of layers of the ultra-high molecular weight polyethylene fiber laid cloth is 60;
s3, prepressing and forming: starting a hydraulic press to perform pre-press forming on the paved device in the step S2, wherein the pre-press forming temperature in the step S3 is 65 ℃, the pressure is 12MPa, and the pressing is performed for 60min without changing the temperature and the pressure;
s4, pruning: cutting off the peripheral excess materials of the helmet shell after the pre-pressing and forming in the step S3 along a die line by using a cloth cutting machine with a knife to obtain a helmet shell blank;
s5, vacuum sealing: putting the helmet shell blank obtained in the step S4 into a static pressure female die, sealing and packaging the helmet shell blank by using a sealing bag, and vacuumizing;
s6, isothermal static pressure: immersing the helmet and the model subjected to vacuum pumping in the step S5 into a pressure cylinder of an isothermal static press for isothermal static pressure composite molding, wherein the isothermal static pressure composite molding specifically comprises the following steps of: gradually heating the medium in the pressure cylinder to 120 ℃, then raising the pressure to 24Mpa, keeping the temperature and the pressure stable, pressing for 60min, keeping the pressure stable, starting to cool the medium to 50 ℃, removing the pressure in the cylinder, and taking out the helmet and the model;
s7, finishing and painting: and (3) removing the helmet subjected to isothermal static pressure treatment in the step (S6) from the static pressure female die, further grinding the edge of the helmet in order, and uniformly spraying paint on the inner surface and the outer surface of the bulletproof helmet.
Detection result
The bulletproof helmets prepared in examples 1 to 3 were tested for their respective impact properties.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An aramid fiber composite polyethylene bulletproof helmet is characterized in that: comprises an outer helmet shell (1), an inner helmet shell (2) and an outer coating (3); the outer helmet shell (1) is formed by pressing a plurality of layers of ultra-high molecular weight polyethylene fiber weftless fabric; the inner helmet shell (2) is formed by pressing a plurality of layers of dipped aramid woven fabrics; the outer coating (3) is made of an acrylic nanocomposite.
2. The aramid composite polyethylene bulletproof helmet of claim 1, wherein: the cloth surface density of the ultra-high molecular weight polyethylene fiber non-woven cloth is 70-100 g/square meter, and the cloth surface density of the gum dipping aramid fiber woven cloth is 300-420 g/square meter.
3. The aramid composite polyethylene bulletproof helmet of claim 2, wherein: the number of layers of the ultra-high molecular weight polyethylene fiber laid fabric is 38-60.
4. The aramid composite polyethylene bulletproof helmet of claim 2, wherein: the number of layers of the gum dipping aramid woven cloth is 10-15.
5. A method for preparing the aramid fiber composite polyethylene bulletproof helmet, which is characterized by comprising the following steps of:
s1, cutting a cloth piece: cutting each layer of gummed aramid woven cloth and ultra-high molecular weight polyethylene fiber weft-free cloth according to a pattern;
s2, laying: firstly, laying and overlapping the multi-layer gummed aramid fiber woven cloth on a convex mould of the helmet layer by layer in a staggered way, and then continuously overlapping and overlapping the multi-layer ultra-high molecular weight polyethylene fiber laid cloth in the staggered way;
s3, prepressing and forming: starting a hydraulic press to pre-press and mold the device paved in the step S2;
s4, pruning: cutting off the peripheral excess materials of the helmet shell after the pre-pressing and forming in the step S3 along a die line by using a cloth cutting machine with a knife to obtain a helmet shell blank;
s5, vacuum sealing: putting the helmet shell blank obtained in the step S4 into a static pressure female die, sealing and packaging the helmet shell blank by using a sealing bag, and vacuumizing;
s6, isothermal static pressure: immersing the helmet and the model subjected to vacuum pumping in the step S5 into a pressure cylinder of an isothermal static pressure machine for isothermal static pressure composite molding;
s7, finishing and painting: and (3) removing the helmet subjected to isothermal static pressure treatment in the step (S6) from the static pressure female die, further grinding the edge of the helmet in order, and uniformly spraying paint on the inner surface and the outer surface of the bulletproof helmet.
6. The method for preparing the aramid fiber composite polyethylene bulletproof helmet according to claim 5, which is characterized in that: the pre-pressing molding temperature in the step S3 is 60+/-5 ℃, the pressure is 10 MPa+/-2 MPa, and the temperature and the pressure are kept unchanged and pressed for 55-60 min.
7. The method for preparing the aramid fiber composite polyethylene bulletproof helmet according to claim 5, which is characterized in that: the step S6 of isothermal static pressure composite molding specifically comprises the following steps: gradually heating the medium in the pressure cylinder to 115-120 ℃, then boosting to 22MPa plus or minus 2MPa, keeping the temperature and pressure stable, pressing for 55-60 min, keeping the pressure stable, starting to cool the medium to 50 ℃, removing the pressure in the cylinder, and taking out the helmet and the model.
8. The method for preparing the aramid fiber composite polyethylene bulletproof helmet according to claim 5, which is characterized in that: the gum dipping aramid woven fabric is obtained by twisting warp yarns and weft yarns, weaving to obtain the woven fabric, and then treating the obtained aramid woven fabric through a gum dipping process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310656987.1A CN116718076A (en) | 2023-06-05 | 2023-06-05 | Aramid fiber composite polyethylene bulletproof helmet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310656987.1A CN116718076A (en) | 2023-06-05 | 2023-06-05 | Aramid fiber composite polyethylene bulletproof helmet and preparation method thereof |
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| CN116718076A true CN116718076A (en) | 2023-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI855904B (en) * | 2023-10-24 | 2024-09-11 | 和成欣業股份有限公司 | A helmet and a forming method thereof |
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2023
- 2023-06-05 CN CN202310656987.1A patent/CN116718076A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI855904B (en) * | 2023-10-24 | 2024-09-11 | 和成欣業股份有限公司 | A helmet and a forming method thereof |
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