KR100573959B1 - Method for Manufacturing a bulletproof helmet - Google Patents

Abstract

The present invention relates to a method for producing a bulletproof helmet. In particular, ultra-high molecular weight polyethylene uni-direction fibers are coated with a thermoplastic resin, and an outer layer of thermosetting resin coated ultra high molecular weight polyethylene woven (ultra high molecular fabric) fibers are laminated and pressurized for bulletproof performance and The present invention relates to a method for manufacturing a bulletproof helmet having excellent impact resistance and strong resistance to environment such as immersion (humidity) and temperature.

Bulletproof Helmet, Thermoplastic, Thermosetting Resin, Ultra High Molecular Weight Polyethylene

Description

Bulletproof helmet manufacturing method {Method for Manufacturing a bulletproof helmet}

Figure 1a, b is an enormous process diagram showing the manufacturing process of the present invention.

Figure 2 is a perspective view of a helmet produced by the present invention.

Figure 3 is a process diagram showing another embodiment in the process of the present invention.

* Description of Signs of Main Parts of Drawings *

100 ... fabric 101 ... release film

200 ... Mold 201 ... Wrinkle Holder

300 ... Helmet 400 ... Well-shaped ultra high molecular weight polyethylene woven fiber coated with thermosetting resin

401 ... square ultra high molecular weight polyethylene woven fiber coated with thermosetting resin

403 ... reinforcement

The present invention relates to a bulletproof helmet. In particular, ultra-high molecular weight polyethylene (ultra high molecular weight polyethylene) uni-directional fibers (hereinafter referred to as 'uni-directional fibers') coated with a thermoplastic resin, and the outer layer is coated with a thermosetting resin, the wings and square ultra-high molecular weight Polyethylene woven fiber (hereinafter referred to as woven fiber) is laminated and pressurized to provide a bulletproof helmet that is thin and light, has excellent ballistic performance and impact resistance, and has excellent ballistic performance with strong resistance to environments such as immersion (humidity) and temperature.

In general, bulletproof helmets are intended to prevent bullets and debris and to protect human life from head injury due to impact after bulletproof. Such helmets typically include fabrics made of ballistic fibers, such as aramid fibers.

Such a bulletproof helmet includes a composition in which aramid fibers made of aramid are laminated, or dynima and spectra mainly composed of high-strength polyethylene, or a mixture of both fibers is used.

Therefore, an object of the present invention is to provide a helmet that is thin and light, but also excellent in bulletproof performance and impact resistance, strong in water resistance (humidity), temperature and the like, and excellent in bulletproof performance, and a thermoplastic resin to achieve the above object. The coated unidirectional fiber is laminated in 30-40 layers and heated and pressed by a molding machine to form a helmet first, and the woven fiber coated with thermosetting resin is laminated on the outer layer by one or more sheets so that the ballistic capability is FSP It is intended to provide a bulletproof helmet with a V50 value of 2,000 ft / s or more, 0.2Jcal 17 grains, NIJ LEVES II (NIJ-STP-0106.01) or more, and a thickness of 9.0 mm or less.

Still another object of the present invention is to construct a helmet having excellent ballistic performance in the above-described process by inserting a reinforcing agent between the layers of the fiber when laminating the woven fiber coated with a thermosetting resin on the first molded helmet It is to provide a bulletproof helmet is configured.

In order to achieve the object of the present invention described in detail by the accompanying drawings the process for producing a helmet as follows.

       Figure 1a is a schematic diagram showing the first and second processes of the manufacturing process of the present invention.

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As shown in FIG. 1A, a first process for manufacturing a helmet is performed by cutting a fabric 100 coated with a thermoplastic resin to a unidirectional fiber, which is a fiber used in the present invention, to a predetermined size (square), and having about 30-40 layers. The fiber grain direction is laminated in the same manner at 45 ⁰ .

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In addition, as shown in FIG. 1A, a second process for manufacturing a helmet may include fabrics laminated by the first process. Covering the release film 101 on the outside of each and seating the fabric 100 in the lower mold 200 in this state and then install a wrinkle holder 201 on the top of the fabric to hold the fabric. In this state, as the lower mold rises, the upper mold is combined with the upper mold to press the fabric at an appropriate pressure to form a helmet primarily. At this time, the mold temperature is 120 ~ 130 ⁰ C and the pressing force of the mold is operated at 40-60t.

 And the bubble removing process generated in the pressurized fabric is operated in parallel. In addition, the helmet 300 that is pressed and molded does not perform cooling.

1B is a schematic diagram showing third and fourth processes in the manufacturing process of the present invention.

In addition, as shown in FIG. 1B, the third process for manufacturing a helmet includes a woven fiber 400 having a wing portion formed in an octagonal direction on an outer side of the primary molded helmet 300 formed by the second process. ), And then thermosetting resin is coated, and then the wings are overlapped and then fixed.

In this state, the temperature of the second mold is maintained at 120-130 ⁰ C and bubbles are generated in the helmet. The pressing force of the mold is 170-190 tons, which is pressurized at a higher pressure than the second process. At this time, the time required for molding by pressing takes about 10-20 minutes.

The helmet pressed on the mold is cooled for about 10 minutes and then forcibly demolded to manufacture the helmet 300.

Looking at the protective ballistic limit (V50) of the helmet manufactured by the manufacturing process as described above,

The ballistic resistance measurement rate applied to each helmet during the ballistic test of the helmet is at least 2,000 ft / s.

And use 0.22cal, 17grain (1,1 ± 0.016g) of FSP. In addition, the bulletproof performance of the bullet shot is at least 9 mm, the anti-ballistic test of the helmet is at least 358m / s ± 15kW for FMJ bullets, .357Magnum, 425 ± 15kpa for JSP bullets.

The test specifications described above are as follows.

     Bulletproof rating     Tan type     Bullet weight      Bullet speed         I .22 LRHV LEAD   2.6 g (40 gr)   320 m / s (1050 ft / s) .380 RN LEAD   10.2 g (158 gr)   259 m / s (850 ft / s)        IIA  9mm FMJ RN   8.0 g (124 gr)   332 m / N (1090 ft / s) .357 Magnum JSP   10.2 g (158 gr)   381 m / s (1250 ft / s)        II  9mm FMJ   8.0 g (124 gr)   358 m / s (1175 ft / s) .357 Magnum JSP   10.2 g (158 gr)   425 m / s (1395 ft / s)

200~

300(mm) 삽입하여 헬멧의 충격이 우수하고 침수(습기), 온도 등 환경에 대한 저항성이 강하게 될 수 있다. As another embodiment of the present invention, in order to maintain the rigidity of the helmet in the process of the present invention, the woven fiber formed in the shape of the octagonal direction of the wings coated with a thermosetting resin on both sides of the helmet 300 in the third process Stacking (400) overlapping in one direction and a reinforcing agent (403) between the layers of the woven fiber (400)

200 ~

By inserting 300 (mm), the impact of the helmet may be excellent and the resistance to the environment, such as flooding (humidity) and temperature, may be strong.

In another embodiment of the present invention by coating a thermosetting resin on the square woven fibers 401 on both sides of the helmet 300 and laminated in one direction, the helmet can be manufactured through the above process.

As described above, in the present invention, 30-40 layers of unidirectional fibers coated with a thermoplastic resin are laminated and pressurized by a molding machine to form a helmet by the first and second processes, and to the inside and the outside of the helmet by the third process. Coating the vinyl ester, which is a thermosetting resin, on the woven fabric formed in the octagonal shape of the wings, and laminating the wings together, and heating and pressurizing them at a high pressure to make them thin and light, but also excellent in bulletproof performance and impact resistance. And it is effective to manufacture a helmet that is resistant to the environment, such as flooding, temperature.

Claims (6)

delete In the method of manufacturing a bulletproof helmet, an ultra high molecular weight polyethylene unidirectional fiber is laminated with 30-40 layers of fabric coated with a thermoplastic resin, so that a bulletproof helmet having a bulletproof capacity of 2.000 ft / sec or more and a thickness of 9.0 mm or less can be manufactured. Bulletproof helmet manufacturing method characterized in that. delete The method of claim 2, wherein the ultra-high molecular weight polyethylene unidirectional fibers are cut into a predetermined size of the fabric coated with a thermoplastic resin, but the fiber grain direction is laminated in the same manner, and the fabric 100 is installed on the mold 200. And then pressurized to 40-60t, parallel to the bubble removing process generated in the pressurized fabric, the outer surface of the helmet 300 coated with a thermosetting resin wing or square ultra-high molecular weight polyethylene woven fiber 400 Pressurized again to 170-190t after lamination and then demolded after cooling to produce a helmet bulletproof helmet, characterized in that for producing a helmet (300).  The method of claim 2, wherein both sides of the helmet 300 is laminated with a super-high molecular weight polyethylene woven fiber 400 of the wing-shaped or square-shaped coated with a thermosetting resin and inserting the reinforcing agent 403 between the layers of the woven fiber Bulletproof helmet manufacturing method characterized in that. delete

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