JPS63267898A - Protective material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The protective material of the present invention can be used alone or in combination with other materials to protect the body from bullets, knife attacks, etc. Or as a protective screen or curtain.

Walls, evacuation and rescue bags, hoods, hard hats, bulletproof vests, etc. can be used as Q materials.

<Prior Art> Various types of such protective materials are known, including fiber sheets, particularly mm1 sheets using high-strength fibers, and combinations of such fiber sheets and other materials.

An example of a fiber sheet using high-strength fibers is R35.
"Protective material characterized by using a laminated structure consisting essentially of a material composed of fibers having a Young's modulus of 09/d or more and a melting temperature of 400°C or more" Publication No. 52-66771) or ``Ultra-strong, high-elastic m coarse fabric with a Young's modulus of 3,000 kg/- or more and a synthetic fiber or natural wire $111 with a Young's modulus of isoo Kg,,'- or more of 511 or more each "Protective equipment characterized by

In addition, an example of a protective material made by combining a fiber sheet with other materials is ``The base fabric is a high-density woven fabric woven without twisting using ultra-high strength fibers, and a synthetic resin film is coated on at least one side of the base fabric. ``Protective cloth formed by integrally forming a plurality of layers to a required thickness and stacking a plurality of layers'' (Japanese Utility Model Publication No. 166639/1983) is known.

By the way, as mentioned above, it is well known that fiber mats are used to protect oneself from sharp knives and sharp metal objects, and to wrap and protect fragile items. However, for example, although this is sufficient to raise the height of something like a small knife, it is difficult to stop a large knife such as a Deba knife. To stop this, a very thick fiber mat is required. To compensate for this, it is conceivable to use a sandwich of wire mesh, etc., and use fibers to hold small knives and fasten large ones with wire mesh, but adding wire mesh makes it hard and difficult to bend, and the flexibility of the fiber mat is reduced. Lost.

<Objective of the Invention> The present invention provides a protective material that is lightweight and thin, has sufficient strength to stop even a large knife, and has the same flexibility as a fiber mat alone.

<Structure of the Invention> That is, the present invention provides (1) an anti-II material (2) characterized in that a large number of hard members are independently attached to a fiber sheet so as to partially tighten the fiber sheet; (3) The protective material according to claim (1), in which there are at least 2000 members per m2; (3) the protective material according to claim 1, in which the gaps between the hard members are at least 0.5 #ll11 or more on average; (1)
or (2).

The present invention will be explained in detail with reference to the drawings. Figures 1 and 2 are a front view and a sectional view showing a specific embodiment of the present invention. (1) is a felt-like mat made of randomly spread ILM fibers into a flat shape (2) is a hard member made by penetrating a long thin metal piece through the fiber mat, bending its tip, and tightening it. be.

Normally, when a normal fiber mat is pierced with something like a thin knife, the resistance of the fiber mat itself will stop the stabbing. However, if a mat is pierced with a large and powerful knife like a Deba knife, the fibers will be cut one after another by the powerful blade, so a mat made only of fibers will not necessarily provide sufficient protection.

However, in the case of the present invention, in the case of such a large blade, the blade always hits one of these hard members (a), so the blade cannot move forward unless it cuts this hard member (a). It does not penetrate easily due to resistance.

Moreover, despite this greatly improved penetration resistance, its flexibility is not significantly different from that of the original fiber mat. When it bends, wire mesh.

With resin plates, etc., it is necessary to bend the metal or resin itself, which requires a large amount of force, but in the case of the present invention, each hard member (2) is independent and not connected to each other, so bending is easy. This is because in some cases, this bending force acts only on the fiber mat between each hard member (2) and can be bent extremely easily. Therefore, each hard member (2) must be independent from each other, that is, not connected. be.

In addition, this hard member ('2J) must be firmly fastened to the fiber mat (1) so that it cannot be easily removed.To tighten it, a long and thin metal piece must be passed through the mat (188) as shown in this example. A convenient method for tightening is to bend the tip of the fiber and insert it into the fiber in the shape of a mouth, which can be tightened very efficiently using the principle of a stapler.In addition, for example, by driving in a so-called eyelet. It may be tightened.In short, any shape may be used as long as the members can be firmly tightened to the fiber mat (1) independently of each other.Also, the material used for the hard member may be metal, resin, ceramic, etc. Any hard member is sufficient as long as it is not easily destroyed.

In addition to this example, the hard member can be arranged in various ways, for example as shown in FIG. In that case, as mentioned above, it is necessary that each member be independent of each other and not connected.

Furthermore, it is necessary that a large number of members be closely arranged so that a knife or the like will always come into contact with them. Although it depends on the size of the member, it is desirable that there be at least 2,000 or more pieces per m2. However, as mentioned earlier, it is necessary to maintain the same flexibility as the original fiber mat, so even if there are many members, the distance between each member is at least 0.5 on average even at the closest point.
It is desirable to arrange the protective material with a gap of m or more so that it can be freely bent.

Also, the fiber sheet used here! ! A nonwoven fabric in which the fibers are spread in a planar manner at random is desirable. The reasons for this are that if the fibers are not parallel, it is harder to cut with a knife, it is easier to bite into a hard member and tighten, it is flexible and bendable, and it is lightweight. Nonwoven fabrics can be manufactured using conventional methods such as opening short fibers with a card, spraying long fibers while spinning them, or stacking fibers by blowing away the fibers being spun with air. Manufacturing methods can be used. In addition, fabrics such as woven or knitted fabrics can also be used, although the performance is lower than that of nonwoven fabrics. It may also be a composite of fabric and nonwoven fabric. Alternatively, the outside of the fiber sheath 1- to which the hard member is attached may be covered with a fabric, and this is generally desirable for aesthetic reasons.

In addition, the fibers used here include synthetic materials such as polyester, polyamide, and polyacrylic! Recycled I1M fibers such as rayon, natural fibers such as cotton, wool, hemp, etc. may be used, and fibers other than organic fibers such as metal fibers and asbestos (inorganic fibers) may also be used.

As mentioned above, in the present invention, the main protective effect is on the attached hard member, but if the mtI& is too weak and the protective material is easily damaged, it is of no use, so it is better to have stronger fibers. good. Especially high-strength polyethylene fibers, aromatic polyamide fibers, high-strength aromatic polyester fibers, etc.18
When using fibers having a high tenacity of g/d or more, excellent results can be obtained since they are not easily broken and can sufficiently exhibit their protective power. Of course, it is also possible to use a mixture of these fibers. For example, various combinations are possible, such as one with high strength and hygroscopicity and excellent wearability, or one with high strength and excellent flame retardancy.

<Effects of the Invention> According to the present invention, it is possible to obtain a protective material that has extremely strong protective power, is extremely flexible, has a light weight, and is thin and compact due to the tightening action of the hard member. - can be done.

<Example> The present invention will be specifically explained below using Examples.

Example 1 A polybara phenylene prephthalamide fiber with a fineness of 1.5 denier and a fiber length of 51 mm was randomly opened with a card, and then formed into a thin sheet shape of about 300 g per m2, which was 20 am long and 1 m + square. Steel wire as shown in Figure 2. They were bent into the shape of , and tightened by biting into this sheet, and 7,600 pieces per m2 were attached in the arrangement shown in Figure 3 to serve as a protective material. The average distance between the members at this time is approximately 2#
It was 1I11. When we conducted puncture tests with various blades on this protective material, not only knives but also large knives could not be penetrated by human effort. Moreover, its flexibility is no different from that of a simple fiber sheet, and when worn as protective clothing, it feels much softer, lighter, and easier to move than conventional plate-shaped protectors. .

Example 2 In Example 1, a 40/2' S twill fabric made of polymetaphenylene isophthalamide fibers was superimposed on the front and back surfaces of a fiber sheet made of polybara phenylene terephthalamide, and a metal member was attached by biting into it. Created protective materials. The obtained protective material was not only strong against cutlery, but also more resistant to flame and had excellent protection against dangerous weapons such as Molotov cocktails.

Furthermore, almost the same effect was obtained when the protective material of Example 1 was covered with a 40/2'S twill fabric made of polymetaphenylene isophthalamide fiber.

[Brief explanation of drawings]

The first figure is a plan view showing one embodiment of the present invention, the second figure is a sectional view thereof, and the third figure is a plan view showing another embodiment. Patent applicant Teijin Ltd. Figure 2

Claims (3)

[Claims] (1) A protective material characterized by having a large number of independent hard members attached to a fiber sheet so as to partially tighten the sheet. (2) The protective material according to claim (1), wherein there are at least 2,000 or more hard members per m^2. (3) The protective material according to claim (1) or (2), wherein the gaps between the hard members are at least 0.5 mm or more on average.