JPH10237739A - Woven fabric for security sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a woven fabric for security sheets, capable of being easily not cut with edged tools, etc., excellent in durability and useful for the hoods of tracks, etc., by partially arranging prescribed fibers having a high strength and a high elastic modulus in the woven fabric in a lattice-like state. SOLUTION: In a union cloth in which highly strong and highly elastic modulus fibers, such as aramide fibers, having a strength of >=200kg/mm<2> and an elastic modulus of >=5000kg/mm<2> are at least partially arranged, the fibers are arranged in a lattice state having a mesh scale of <=5cm. The fibers having the high strength and the high elastic modulus preferably comprise 1000-50000 denier yarns, and the union cloth is preferably coated with a resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet made of synthetic fiber, natural fiber, glass fiber, etc., which is effective for crime prevention used in truck tops, outdoor warehouses, trunk boxes and the like, and has excellent durability. For textiles.

[0002]

2. Description of the Related Art Sheets made of synthetic fiber and natural fiber are used for truck hoods, ship hoods, outdoor storage hoods, and trunk box sheets, and have advantages such as light weight, ease of assembly work, and low price. Used in large quantities. However, if these sheets are left out of the reach of people at night, there is a danger that the objects contained in the sheets may be stolen, because they can be easily cut with sharp objects such as blades. They had to be kept in a safe place where outside intruders could not enter, or kept under close surveillance.

In order to prevent such theft, a sheet is used in which a net made of a metal foil which cannot be easily cut with a blade or the like is adhered to these sheets. However, such a sheet requires a complicated manufacturing process, has a problem in that the net is easily peeled off from the sheet and has a problem in durability, and also has a problem such as winding in workability.

In Japanese Patent Publication No. Hei 7-13351, it is proposed to insert a lattice fabric composed of fibers or yarns having high strength into an intermediate layer between a surface material and a lining.
Even with such a structure, there is a disadvantage that peeling is likely to occur between the lattice fabric and the front and backing due to repeated folding and rewinding, and such a sheet has a problem that a manufacturing process is complicated. there were.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides a durable security sheet woven fabric which is not easily cut by a blade or the like. is there.

[0006]

That is, the present invention has a strength of 20 mm.
A cross-woven woven fabric provided on at least a part of high-strength high-modulus fibers having a modulus of 0 kg / mm ² or more and a modulus of 5000 kg / mm ² or more, wherein the fibers are arranged in a lattice pattern. is there. 2. The woven fabric for a security sheet according to claim 1, wherein the high-strength high-modulus fiber is an organic fiber. The woven fabric for a security sheet according to claim 1, wherein the high-strength high-modulus fiber is comprised of 1,000 to 50,000 denier yarn. 2. The woven fabric for a security sheet according to claim 1, wherein the mesh size of the high-strength high-modulus fibers is 5 cm or less. 2. The security sheet woven fabric according to claim 1, wherein the mixed woven fabric is coated with a resin.

The high-strength high-modulus fibers include metal fibers, glass fibers, aramid fibers, wholly aromatic polyester fibers,
Examples include high-strength polyethylene fiber, high-strength polyvinyl alcohol fiber, polyparaphenylene benzobisoxazole fiber, and carbon fiber, but from the viewpoint of weight reduction and handleability, aramid fiber, high-strength polyethylene fiber and polyparaphenylene benzobisoxazole fiber. ,
It is preferable to use an organic polymer fiber such as Also,
The form of the yarn composed of these fibers may be a filament or a spun yarn, and is not particularly limited.

The high-strength high-modulus fiber used in the present invention has a strength of 200 kg / mm ² or more and a modulus of 5000 kg / m 2.
m ² or more. The fiber bundle made of such fibers has breaking resistance to the blade, and by weaving the fiber bundle in a lattice shape, the blade becomes difficult to cut and tear at the fiber thread portion, thereby achieving the purpose of crime prevention. It will be. on the other hand,
Less than 200 kg / mm ^2, a modulus of elasticity of 5000 kg / mm
^If it is less than ² , the tearing resistance of the blade becomes insufficient, which is not preferable. Preferably strength 250 kg / mm ²
As described above, the elastic modulus is 6000 kg / mm ² or more.

[0009] The fineness of the fiber thread resistant to the blade of the present invention is preferably from 1000 d to 50,000 d. If the fineness of the fiber bundle is less than 1000d, the cutting resistance to a blade or the like becomes small, which is not preferable. Also, 5000
If it exceeds 0d, the irregularities on the surface of the woven fabric become severe, and it becomes difficult to coat the resin or the like. Further, weaving troubles increase, which is not preferable.

The fiber material constituting the sheet fabric other than the high-strength and high-modulus fibers used in the present invention includes, but is not particularly limited to, fibers generally used for industrial materials. Typical examples include synthetic fibers such as polyester fiber, polyamide fiber, polyvinyl alcohol fiber, acrylic fiber, polyethylene fiber, and polypropylene fiber; regenerated fiber such as rayon fiber and polynosic fiber; natural fibers such as cotton and hemp; and composite yarns thereof. be able to.

The woven structure of the woven fabric for a sheet of the present invention is not particularly limited as long as the fiber bundle composed of fibers having high strength and high elastic modulus can be woven into a lattice, and is not particularly limited. , Satin weave, ripstop, etc. In particular, plain weave is generally preferred.

The woven fabric for sheets of the present invention must be woven in the warp direction and the weft direction so that the mesh of the high strength and high modulus fibers is 5 cm or less. Here, the measure refers to the longer one of the lengths measured in the warp direction and the weft direction of the lattice space formed by the high-strength high-modulus fibers. Eye is 5c
If it is woven so as to exceed m, it is not preferable because a hole from which the inside can be easily taken out can be easily opened with a blade or the like. The size is preferably 3 mm to 30 mm. If it is less than 3 mm, the amount of high-strength high-modulus fibers used is unnecessarily increased, resulting in disadvantages such as heavy sheets and high costs.

In the present invention, it is important that a high-strength, high-elasticity fiber thread, which is resistant to cutting such as a knife, is woven in a lattice shape. It is possible to provide a sheet fabric having good handleability, in which the high-strength fiber portions are not peeled off, and the workability is not so bad as when metal foil or the like is used.

The high-strength, high-modulus fiber has a mesh size of 5c as described above.
m, but the number of the fibers may be one, but a plurality of continuous or intermittently formed strips of high-strength high-modulus fiber with a width of 1 mm to 10 mm are formed. May be.

It is desirable that the mixed woven fabric is coated with a resin such as a vinyl chloride resin, a polyurethane resin, a polyacrylic resin, and a polyester resin from the viewpoint of improving waterproofness or stain resistance.

[0016]

EXAMPLES The present invention will be described below by way of examples, but the present invention is not limited to these examples. (Example 1) 1000d polyester filament (A) for industrial materials and aramid fiber (strength: 280 kg / m
Using a 4000 d yarn (B) having an m ² and an elastic modulus of 7300 kg / mm ² ), a rapier loom is used to form a plain weave structure in which one warp and one weft (B) are driven in every (A) 20 yarns. The fabric was woven. Scouring the obtained woven fabric by an ordinary method,
Heat setting was performed to obtain a woven fabric in which (B) was woven in a lattice shape. Next, a vinyl chloride resin was applied to one surface of the woven fabric. The lattice mesh of (B) of the obtained woven fabric was 2.7 cm in both the warp direction and the weft direction. The warp direction from this fabric,
A piece of cloth having a length of 1 m in the weft direction was taken out, fixed to a 1-m square frame, and the cloth was cut with a commercially available cutting knife. .

(Embodiment 2) In the same manner as in Embodiment 1,
For both wefts, (B) was woven a plain woven fabric in which one per (A) every 40 fibers was driven, scoured and heat-set in accordance with a conventional method, and then applied a resin. (B) of the obtained fabric
Was 4.5 cm in both the warp and weft directions. An attempt was made to cut a piece of cloth with a commercially available cutting knife in the same manner as in Example 1, but a larger hole was made than in Example 1, but it was difficult to enter the hand.

(Example 3) A plain woven fabric is woven in the same manner as in Example 1 except that the fiber fineness of the fiber (B) is 1,000 d in Example 1, and scouring and heat setting are carried out according to a conventional method. Thereafter, a resin was applied. The lattice mesh of (B) of the obtained woven fabric was 2.3 cm in both the warp direction and the weft direction. When a piece of cloth was cut with a commercially available cutting knife in the same manner as in Example 1, although the cutting was difficult, the tendency for the hole to become larger was observed after repeating the cutting operation about 30 times.

Example 4 Example 3 was carried out in the same manner as in Example 3 except that warping and weft driving were performed so that seven fibers (B) were continuously arranged in the warp direction and the weft direction. A plain fabric was woven to obtain a sheet. The fibers (B) are arranged in a band shape in a woven shape, the width of the band is 5 mm in both the warp direction and the weft direction, and the mesh size of the lattice is 2.5 c in both the warp and weft directions.
m. An attempt was made to cut a piece of cloth using a commercially available cutting knife in the same manner as in Example 1, but it was not possible to cut the piece into a size that would allow access.

(Comparative Example 1) In Example 1, a plain weave was woven using only (A) without using (B), and scouring and heat setting were performed by a conventional method. The weaving density of the obtained woven fabric was 8 yarns / inch in both the warp and weft directions. Example 1
When a piece of cloth was cut with a commercially available cutting knife in the same manner as described above, it was possible to easily cut the cloth, and it was possible to open the cut part where the hand could be sufficiently inserted.

(Comparative Example 2) In Example 1, a plain woven fabric in which (B) was driven in every 60 strands (A) in both longitudinal and weft directions was woven and scoured and heat-set according to a conventional method. . The mesh of the lattice of (B) of the obtained woven fabric is in the warp direction,
It was 7.5 cm in both weft directions. When a piece of cloth was cut with a commercially available cutting knife in the same manner as in Example 1, a cut portion that could be easily reached was formed.

(Comparative Example 3) The fabric of Comparative Example 1 had a thickness of 0.5
The aluminum foil with a lattice size of 5 mm square and a lattice width of 5 cm square and a lattice width of 5 mm was bonded using an epoxy-based adhesive, but the entrainment was difficult, and the enlarging and enlarging operations were repeated ten times. Repeatedly, the aluminum grid foil came off easily from the fabric.

[0023]

According to the present invention, it is possible to provide a sheet fabric which has an excellent security effect which is not easily torn by a blade or the like and which can be provided only by a simple process.

Claims (5)

[Claims] 1. A strength of 200 kg / mm ² or more and an elastic modulus of 5
A woven fabric for a security sheet, wherein the fibers are arranged in a lattice pattern in a cross-woven fabric in which at least a part of a high-strength high-modulus fiber of 000 kg / mm ² or more is arranged. 2. The security sheet woven fabric according to claim 1, wherein the mesh of the lattice formed by the high-strength high-modulus fibers is 5 cm or less. 3. The woven fabric for a security sheet according to claim 1, wherein the high-strength high-modulus fibers are organic fibers. 4. The high-strength, high-modulus fiber is 1000 to 500.
2. The method according to claim 1, wherein said thread is made of 00 denier yarn.
The woven fabric for a security sheet according to the above. 5. The security sheet woven fabric according to claim 1, wherein the mixed woven fabric is coated with a resin.