JP2002144480A - Laminated sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated sheet material having excellent cushioning properties against spray penetration. SOLUTION: The laminated sheet material is constituted by superposing aramide filament cloths 2, metal thin plates 3 and aramide nonwoven fabrics 4 one upon another from a surface side. An iron powder 5 is bonded to the surfaces of the aramide filament cloths 2 not only to prevent the opening of the stitches of the cloths but also to enhance penetration resistance. By arranging the metal thin plates 3 between the aramide filament cloths 2 and the aramide nonwoven fabrics 4, the cushioning action against spray penetration can be effectively enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet material for buffering a penetrating force.

[0002]

For example, it is known that duralumin or the like is used as a material for preventing penetration of a sharp member, but it has no flexibility and is inconvenient for wearing. Therefore, Japanese Patent Application Laid-Open No. 8-276522 discloses that
There is a laminated fabric having a laminated structure sandwiching a synthetic fiber fabric between woven fabrics made of aramid fibers, and a cloth made of aramid fibers is widely used as a material for buffering penetration force as described above. There has been a demand for a material that is less bulky, has flexibility, and has excellent cushioning and bending properties against penetration of a sharp member as compared with the current one.

[0003] Japanese Patent Application Laid-Open No. 10-89898 discloses a vest in which a plurality of fibers are laminated, wherein the strength of the fibers constituting the woven fabric is 13 g / d or more;
The woven fabric is laminated with the weave direction shifted by 35 to 55 degrees (Claim 1 of the publication), the highly synthetic fiber is made of para-aramid fiber (Claim 2 of the publication), and the heart has further performance. A blade plate made of a plastic plate or a metal plate is additionally inserted from above for the purpose of reinforcement (publication No. 0013). When heavy equipment is used, the mobility is reduced, and it is difficult to always wear it. However, since weight reduction and ease of exercise are important, performance is enhanced only in the heart, which is the most important part of the body (Japanese Patent Publication No. 0013), which is softer and lighter and thinner than conventional ones. It is described as having excellent blade-proofing properties, no fatigue even when worn constantly, and improved wearability (JP-A-0036). In this way, a heavy and hard plastic plate or metal plate is not used as a whole but is partially used to reduce the weight, but performance is enhanced in a portion using a plastic plate or a metal plate. However, it is expected that the performance of the other parts remains the same, and that simply arranging a plastic plate or a metal plate on the outside cannot effectively improve the performance.

[0004] Therefore, an object of the present invention is to provide a laminated sheet material which can effectively improve the performance and is excellent in cushioning property against penetration force.

[0005]

According to the first aspect of the present invention, an aramid filament cloth, a thin metal plate, and an aramid nonwoven fabric are stacked from the surface side on a laminated sheet material for buffering a penetrating force.

According to the first aspect of the present invention, the metal sheet disposed on the back side of the aramid filament cloth resists the penetrating force of the sharp member, and the aramid nonwoven fabric on the back side provides penetration resistance and shock absorption. Is improved. In particular, by arranging a thin metal plate between the aramid filament cloth and the aramid felt cloth, the buffering action against the penetration force is improved.

The invention according to claim 2 is the one wherein a powder made of a hard material is adhered to the aramid filament cloth.

According to the second aspect of the present invention, by adhering the powder, the texture of the aramid filament cloth is hardly opened, and a structure hardly penetrated is obtained.

Further, the invention according to claim 3 is that the powder is adhered to the surface of the aramid filament cloth.

According to the third aspect of the present invention, by adhering the powder, the texture of the aramid filament cloth becomes difficult to open and hardly penetrates. The performance is improved.

Further, the invention of claim 4 is the one wherein a plurality of the aramid filament cloths are stacked.

According to the structure of the fourth aspect, the penetration resistance is further improved by the plurality of aramid filament cloths to which the powder is adhered.

Further, the invention according to claim 5 is the one in which a plurality of the thin metal plates are stacked.

According to the fifth aspect of the present invention, the penetration resistance is improved by using a plurality of thin metal plates.

Further, the invention according to claim 6 is characterized in that 5
It is obtained by laminating two pieces of the aramid filament cloth, four pieces of the metal thin plates, and two pieces of the aramid nonwoven fabric.

According to the configuration of claim 6, by combining in this way, the penetration resistance is improved and
Excellent shock absorption and high reliability.

Further, in the invention according to claim 7, the metal sheet is a titanium alloy.

According to the structure of claim 7, by using a titanium alloy composed of titanium and a dissimilar metal, the strength can be improved and the weight can be reduced as compared with iron or the like.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of the present invention. As shown in FIG. From the front side, five aramid filament cloths 2, four metal thin plates 3 made of titanium alloy or the like, and two aramid nonwoven fabrics, aramid felt cloths 4, are laminated and laminated, and the laminated sheet material 1 can be bent. It has great elasticity. Then, as shown in FIG. 1, the aramid filament cloth 2 is used on the outer surface side and the aramid felt cloth 4 is used on the body side, and has a predetermined flexibility.

The aramid filament cloth 2 is a woven fabric of aramid fibers, and has, for example, aramid fibers woven in one direction and the other side crossing the one direction. On the surface side of the aramid filament cloth 2, an iron powder 5 which is a powder made of a hard material and is a metal powder is adhered without any gap, and the aramid fiber does not appear on the surface due to the iron powder 5. Further, the texture of the aramid fiber is also bonded by the bonding. In this case, an adhesive layer (not shown) is provided on the surface of the aramid filament cloth 2 by coating or the like, and the iron powder 5 is densely arranged and adhered on the adhesive layer. The thickness of the aramid filament cloth 2 including the iron powder 5 is about 200 to 400 microns. still,
Since the iron powder 5 is bonded, compared with the case of bonding an iron plate,
There is also an advantage that the flexibility of the aramid filament cloth 2 is hardly impaired.

The metal thin plate 3 is made of a titanium alloy. Generally, titanium is light in weight, that is, 50 to 60% of iron.
Higher penetration resistance by using an alloy with a dissimilar metal from the viewpoint of strength, which is softer than iron and excellent in wear, but in this example, a β alloy which has excellent plastic workability and can improve hardness at the same time was gotten. And the metal sheet 3
Has a thickness of about 50 to 150 microns.

As the aramid nonwoven fabric, various nonwoven fabrics using aramid fibers can be used. As a preferred example, an aramid felt cloth 4 is used, which is subjected to high-density treatment so that there is no gap between the aramid fibers. It is possible to use a felt obtained by entanglement processing of a web made of short fibers. The thickness of the aramid felt cloth 4 is about 2 to 3 mm. The thickness of the laminated sheet material 1 is 5
About 8 mm.

Hereinafter, a test on the laminated sheet material 1 will be described. In the following tests, the aramid filament cloth 2 used was one having iron powder 5 adhered to the surface side, and the thin metal plate 3 used the above-mentioned titanium β alloy.

As a test device, a drop tester was used, and as a sharp member, an ice pick having a diameter of 5 mm and a length of 14 cm was used, and an impact energy of 25 joules was applied by the ice pick. Actually, after fixing an ice pick on a drop tester, applying a load of 1.7 kg, the test piece was dropped from a height of 1.5 meters onto a test material. And the combination of the metal thin plate 3 and the aramid felt cloth 4 was changed. In addition, as the evaluation method, a penetration depth of 5 mm or less was regarded as acceptable.

In Table 1 below, the vertical axis indicates the penetration depth (mm),
The number of aramid filament cloths 2 is plotted on the abscissa. A line with a round point is a line graph of a test material with two aramid felt cloths 4. A square point is a graph with one aramid felt cloth. It is a line graph. In addition, the metal sheet 3 was not used for the test material of this test.

[0026]

[Table 1]

The circle point on the left end side in Table 1 indicates a test material in which three aramid filament cloths 2 are stacked on the surface side of the two aramid felt cloths 4 and has a depth of about 5.5. Mm, and when the number of the aramid filament cloths 2 becomes 5 or more, the penetration depth becomes 0 mm. On the other hand, the square point on the right end side indicates a test material in which seven aramid filament cloths 2 were stacked on the surface side of one aramid felt cloth 4 and had a depth of about 3 mm. According to this test, in the combination of the aramid filament cloth 2 and the aramid felt cloth 4, the buffering action against the penetration force increases due to the increase in the number of laminations, and as a result, one aramid felt cloth 4 and five aramid filament cloths It was found that desired performance could be obtained with the above combination or a combination of two or more aramid felt cloths 4 and four or more aramid filament cloths 2.

The following Table 2 shows that the vertical axis represents the number of metal sheets 3,
The number of the aramid filament cloths 2 is plotted on the horizontal axis, and those having a penetration depth of 5 mm or less are graphed. Those with round points are line graphs of the test material with two aramid felt cloths 4, Those with square points are line graphs of the test material with one aramid felt cloth 4. Then, similarly to the laminated sheet body 1, the test material is laminated in the order of the aramid felt cloth 4, the metal thin plate 3 (sometimes not used), and the aramid filament cloth 2 from the back side. Tables 3 and 4 show the graphs of Table 2 as a table. Table 3 shows the case where the number of the aramid felt cloth 4 is one.
Table 4 shows the case where the number of the aramid felt cloths 4 is two.

[0029]

[Table 2]

[0030]

[Table 3]

[0031]

[Table 4]

The combination of the above number of sheets is one in which the penetration is 5 mm or less in this test. By increasing the number of the metal sheets 3 in this manner, the other cloths 2, 4
It can be seen that the number of sheets can be reduced and the penetration resistance can be improved. The combination of two aramid felt cloths 4 and five aramid filament cloths 2 in Table 4 is as shown in Table 1 above.
Is a circle, the penetration depth is 0 mm as shown at the center point of the six points, and in order to improve the performance, four metal sheets 3 are used.
Aramid filament cloth 2, made of titanium alloy 2
The laminated sheet material 1 formed by laminating two metal thin plates 3 and two aramid felt cloths 4 is used.

Further, in Table 5 below, the vertical axis represents the penetration depth (mm), and the bar graph B1 represents four aramid felt cloths 2, four metal sheets 3, from the front side (the striking surface in the test). One piece of aramid felt cloth 4 laminated in order, a bar graph B2 shows the metal sheet 3 as the surface side, and four metal sheets, four aramid filament cloths 2 and one aramid felt cloth 4 from the surface side. It was found that when the aramid filament cloth 2 was used as the front side while using the same number, the penetration resistance was improved as compared with the case where the metal sheet 3 was used as the front side. It is considered that this is because the iron powder 5 is adhered to the aramid filament cloth 2, which causes a great resistance to the penetrating force. On the back side, an aramid nonwoven fabric 4 made of felt or the like is preferable in consideration of the time of wearing.

[0034]

[Table 5]

As described above, according to the present embodiment, in the laminated sheet material 1 that buffers the penetrating force, the aramid filament cloth 2, the metal thin plate 3, and the aramid felt cloth 4 that is an aramid nonwoven fabric are arranged from the surface side. , The metal sheet 3 disposed on the back side of the aramid filament cloth 2
Thus, the penetrating force of the sharp member can be prevented, and the aramid felt cloth 4 on the back surface improves penetration resistance and shock absorption. In particular, by arranging the thin metal plate 3 between the aramid filament cloth 2 and the aramid felt cloth 4, it is possible to improve the buffering effect on the penetration force.

As described above, according to the present embodiment, claim 2
Corresponding to the above, the iron powder 5 as a powder made of a hard material is bonded to the aramid filament cloth 2, so that by bonding the iron powder 5, the texture of the aramid filament cloth 2 becomes difficult to open and hardly penetrates. can get.

As described above, according to the present embodiment, claim 3
Corresponding to the above, the iron powder 5 as a powder made of a hard material is adhered to the surface of the aramid filament cloth 4, so that the iron powder 5 is adhered to the surface side so that the aramid filament cloth 4
Texture becomes more difficult to open, it becomes difficult to penetrate,
Further, since the iron powder 5 is on the surface side, cut resistance is improved.

Furthermore, in this embodiment, since a plurality of aramid filament cloths 2 are stacked in accordance with the fourth aspect, the penetration resistance is further improved by the plurality of aramid filament cloths 2 to which the iron powder 5 is adhered. be able to.

Furthermore, in this embodiment, since a plurality of thin metal plates 3 are stacked according to the fifth aspect, the use of a plurality of thin metal plates 3 improves penetration resistance. That is, when a plurality of thin metal plates 3 are used, the resistance at the time of collision becomes greater than when one metal plate is used with the same thickness, and as a result, penetration resistance is improved.

Further, in this embodiment, according to the present invention, five aramid filament cloths 2, four thin metal plates 3, and two aramid felt cloths 4 as non-woven aramid fabrics are provided from the front side. By stacking in this way, a laminated sheet material having improved penetration resistance, excellent shock absorption, and high reliability can be obtained.

Furthermore, in this embodiment, since the thin metal plate 3 is a titanium alloy, the strength can be improved by using a titanium alloy composed of titanium and a dissimilar metal. In addition, the structure is lighter than when iron or the like is used.

Further, as an effect of the embodiment, if a β alloy is used as the titanium alloy, the performance can be further improved, and processing such as forming a predetermined planar shape can be easily performed.

FIGS. 2 to 4 show a second embodiment of the present invention.
The same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In detail, this is an example of use of the laminated sheet material 1 and is an example of use of the supporter 11, The supporter 11 includes a waistcoat-type wearing body 12, and the wearing body 12 is made of a mesh fabric 13 having air permeability.
A vertical opening / closing section 14 is provided at the center of the front surface, and a slide fastener 15 for opening and closing the opening / closing section 14 is provided. Reference numeral 21 denotes a storage bag body for storing the laminated sheet material 1, which is disposed on the back of the front surface of the wearable body 12, and corresponds to the center 22 corresponding to the center of the chest and abdomen of the wearer, and the left and right sides of the wearer. Corresponding left and right side parts 23, 23 are integrally provided, and the front and rear mesh fabrics 24, 24 are sandwiched by an edge band 25 which is folded in half. A laminated sheet material 1 having substantially the same shape as 21 is stored.

By using the laminated sheet material 1 as described above, the impact on the storage bag 21 can be reduced, and even if the sharp member hits, the penetrating force can be effectively reduced, and the corresponding portion is protected. And it is also excellent in wearing feeling. Moreover, since the laminated sheet material 1 has flexibility, the flat sheet material 1 can be bent along the abdomen and left and right flanks of the wearer by bending.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the number of the cloths 2 and 4 and the number of the metal sheets 3 and the combination thereof can be appropriately selected. Further, the laminated sheet material is not limited to the supporter shown in the second embodiment, and can be used as a pad or various kinds of materials, and can be widely used for protective purposes other than those worn. Further, the aramid nonwoven fabric may be a nonwoven fabric made of short fibers or a nonwoven fabric made of long fibers, a dry nonwoven fabric or a wet nonwoven fabric, and is not limited to a production method. The powder is not limited to metal, but may be powder of a hard material such as ceramic. Further, if powders are adhered to the front and back of the aramid filament cloth, the penetration resistance is further improved.

[0046]

According to the first aspect of the present invention, an aramid filament cloth, a metal thin plate, and an aramid nonwoven fabric are laminated from the surface side in a laminated sheet material for buffering a penetrating force, and the performance can be effectively improved. Thus, it is possible to provide a laminated sheet material excellent in cushioning property against penetrating force.

According to a second aspect of the present invention, a powder made of a hard material is adhered to the aramid filament cloth, so that the performance can be effectively improved, and the laminating material has an excellent buffering property against a penetration force. Sheet material can be provided.

According to a third aspect of the present invention, the metal powder is adhered to the surface of the aramid filament cloth, so that the performance can be effectively improved, and the laminated sheet has excellent cushioning property against penetrating force. Material can be provided.

Further, the invention of claim 4 provides a laminated sheet material which is obtained by laminating a plurality of the aramid filament cloths, can effectively improve the performance, and is excellent in buffering property against penetration force. Can be.

Further, the invention of claim 5 provides a laminated sheet material in which a plurality of the thin metal plates are stacked, the performance can be effectively improved, and the cushioning property against the penetration force is excellent. Can be.

Further, the invention according to claim 6 is characterized in that 5
A laminate sheet material, which is obtained by laminating two pieces of the aramid filament cloth, four pieces of the metal thin plate, and two pieces of the aramid nonwoven fabric, can effectively improve performance, and has excellent cushioning property against penetration force. Can be provided.

Further, according to the invention of claim 7, the metal sheet is made of a titanium alloy, the performance can be effectively improved, and a laminated sheet material excellent in cushioning property against penetrating force can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laminated sheet material showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a supporter showing a second embodiment of the present invention.

FIG. 3 is a front view of a storage bag showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a laminated sheet material in a storage bag showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laminated sheet material 2 Aramid filament cloth 3 Metal thin plate 4 Aramid felt cloth (aramid nonwoven fabric) 5 Iron powder (metal powder)

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3B011 AA01 AB04 AC04 4F100 AB01C AB01D AB12C AB12D AB31C AB31D AK47A AK47B AK47E BA03 BA04 BA05 BA07 BA10A BA10E BA11 DE01A DG11A DG11B DG11E GB71 JK11 JL00

Claims (7)

[Claims] 1. A laminated sheet material for buffering a penetrating force, wherein an aramid filament cloth, a metal thin plate, and an aramid nonwoven fabric are stacked from the surface side. 2. A laminated sheet material according to claim 1, wherein a powder made of a hard material is adhered to said aramid filament cloth. 3. The laminated sheet material according to claim 2, wherein the powder is adhered to the surface of the aramid filament cloth. 4. The laminated sheet material according to claim 2, wherein a plurality of the aramid filament cloths are stacked. 5. The laminated sheet material according to claim 4, wherein a plurality of the thin metal plates are stacked. 6. The laminated sheet material according to claim 5, wherein five sheets of the aramid filament cloth, four sheets of the metal sheet, and two sheets of the aramid nonwoven fabric are stacked from the front side. 7. The laminated sheet material according to claim 1, wherein the metal sheet is a titanium alloy.