JP5875161B2 - Protective fiber material and manufacturing method thereof - Google Patents

Description

The present invention relates to a protective fiber material excellent in wearing comfort and a method for producing the same.

The number of late-night crimes is increasing due to the 24-hour living environment. At late-night stores such as convenience stores and first food stores, employees who work late at night are required to have a wide range of simple blade-proof clothing to protect their safety from crimes using blades and avoid danger. ing.

On the other hand, workers working in agriculture, forestry, steel, machining, etc. work in a poor working environment, are always exposed to the risk of cutting accidents, and have excellent wearing comfort that can be worn for a long time. Need clothing materials for blade protection. In the sports and leisure fields, protective clothing that protects athletes and players from sudden collisions, falls, falls, etc., and does not hinder competition movements, liberation, and sweating has not been developed yet.

There are two types of conventional protective fiber materials, a hard type and a soft type. As one of the hard types, a hard flat plate made of metal or ceramic, or an apparel (Patent Document 1) combining them in a piece shape has been proposed. However, since these have a large specific gravity of 6 to 8 kg / m <2>, there is a problem that the total weight is heavy and the flexibility is lacking. Also, fabrics using high-strength fabric 8 (woven fabric) need to be used in combination with hard materials or impregnated with resin at the expense of lightness and flexibility in order to ensure blade prevention. Because it lacks flexibility and breathability and lacks wearing comfort, it is unsuitable for daily wear for a long time.

On the other hand, the soft type has been proposed that uses high-strength fibers alone or specially processed yarns that are combined with metal fibers, glass fibers, etc., with ceramic particles fixed to the surface of the fabric or knitted fabric (Patent Document 2). Yes. In both cases, a practical effect can be expected for “cutting” when a blade or the like slides on the surface of the fabric, but satisfactory performance for wearing comfort such as piercing from the vertical direction and ventilation is not achieved. .

JP 2000-119906 A JP2000-212808

The present invention improves the above-mentioned problem, and a core wire coated with a thermoplastic resin on a twisted wire in which a plurality of high-strength fibers are twisted together is aligned and shifted in a direction, and this is heat-sealed for police and security. Other than activities, it has necessary and sufficient blade-proof performance, is lightweight, has a feeling of discomfort when worn for a long time while maintaining flexibility and breathability, especially when used in the summer, there is little swelling and stickiness, wearing comfort An excellent protective fiber material and a method for producing the same are provided.

The protective fiber material according to claim 1 of the present invention uses a fiber having a tensile strength of 12 g / d or more and a twisted wire diameter of 0.7 to 1.0 mm as a high-strength fiber of a metal wire or a plastic wire . A stranded wire in which a plurality of high-strength fibers are twisted together and coated with a thermoplastic resin having a strand diameter of 0.5 to 1.0 is used, and the centimeter density of the core wire is 1.5 to 3.2. A cored material layer is formed by aligning in parallel with an interval of a line / cm, and a core wire shifted in angle with the aligning direction of the cored material layer is aligned parallelly at an interval. A core material layer is formed, and the intersection of the core wire of the meridian material layer and the core wire of the weft core material layer is integrally formed by heat fusion at 75 to 85% of the original height. Is.

Protective fiber material according to claim 2 of the present invention is characterized in that it is formed in claim 1 Oite, with strands is seven × 7 strands crossing twist.

The method for producing a protective fiber material according to claim 3 of the present invention is as follows: (1) As a high-strength fiber of a metal wire or a plastic wire , a tensile strength of 12 g / d or more and a twisted wire diameter of 0.7-1. Using a 0 mm fiber, a plurality of high-strength fibers are twisted together to form a stranded wire. (2) The surface of the stranded wire is impregnated with a thermoplastic resin, and the wire diameter of the stranded wire is 0.5 to 1. A core wire is formed by coating a thermoplastic resin of 0.0 , and (3) the core wire is arranged in parallel at intervals of a centimeter density of the core wire of 1.5 to 3.2 centimeters / cm. A material layer is formed, on which the core wire is shifted in angle with the alignment direction of the core material layer, and the core wire is drawn in parallel with a spacing of 1.5 to 3.2 centimeters / cm of the core wire. after forming the weft core layer aligned, (4) through the core material layer and the Nukishin material layer, mating point between the core wire and the core wire of Nukishin material layer over the core layer , It is characterized in that integrally formed by thermal fusion bonding or the 75% to 85% of the original height.

According to the protective fiber material of the first aspect of the present invention, a core wire obtained by twisting a plurality of high-strength fibers and coating a thermoplastic resin on a stranded wire is arranged in parallel at intervals to obtain a core material. Forming a weft core material layer on which a core wire shifted in angle with the alignment direction of the meridian material layer is arranged in parallel at intervals, and the meridian material layer and the weft core material Since the layers are integrally formed by heat fusion, the blade has the necessary and sufficient blade-proof performance, is lightweight, retains flexibility and breathability, and is uncomfortable when worn for a long time, especially when used in summer. It is possible to obtain a protective fiber material with less wear and stickiness and excellent wearing comfort.

Furthermore, the contact point with the core wire of the weft core material layer is heat-sealed at 75 to 85% of the original height, so the adhesive strength of the material is strong, there is no displacement or movement, blade prevention performance, air permeability, flexible Sex can be maintained .

Also, the tensile strength of high-strength fiber, diameter strands, coating thickness of the thermoplastic resin, by defining centimeters between density of the core wire coated with a thermoplastic resin, has a stab performance, lightweight Thus, it is possible to obtain a protective fiber material that retains flexibility and breathability and is excellent in wearing comfort.

Further, according to the protective fiber material according to claim 2 , the high-strength fiber formed by 7 × 7 strand cross-twist is excellent in flexibility since the seven unit core wires are in point contact. ing.

Further, according to the method for producing a protective fiber material according to claim 3 , it has a necessary and sufficient blade-proof performance, is lightweight, has a feeling of discomfort when worn for a long time while maintaining flexibility and air permeability, particularly in summer. At the time of use, because the protective fiber material with less stuffiness and stickiness and excellent wearing comfort was further heat-sealed at 75 to 85% of the original height, the contact point with the core wire of the weft core material layer, The adhesive strength of the material is strong, there is no displacement or movement, and the blade-proof performance, air permeability, and flexibility can be maintained .

Hereinafter, the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the protective fiber material of the present invention forms a core wire 4 by covering a stranded wire 2 in which a plurality of high-strength fibers 1 of metal wires or plastic wires are twisted together with a thermoplastic resin 3. Next, as shown in FIG. 3 (A), the core material layer 5 is formed by drawing the core wires 4 at intervals of the outer diameter in parallel, and the core material is formed thereon as shown in FIG. 3 (B). The weft core material layer 6 is formed by aligning the core wires 4 perpendicular to the alignment direction of the layers 5 in parallel at intervals, and the warp core material layer 5 and the weft core material layer 6 are bonded by heat fusion as shown in FIG. The protective fiber material 7 is formed integrally in a lattice shape as shown in FIG.

As the high-strength fiber 1 used in the present invention, a metal wire such as stainless steel or a plastic wire such as an aramid fiber or PBO fiber is used, and a fiber having a tensile strength of 12 g / d or more is used. These high strength fibers 1 are used as a stranded wire 2 in which a plurality of high strength fibers 1 are twisted together as shown in FIG. In this case, the stranded wire 2 formed by, for example, 7 × 7 strand cross-twisting is excellent in flexibility because the 7 unit stranded wires are in point contact. The wire diameter of the stranded wire 2 is preferably 0.7 to 1.0 mm. If the wire diameter is less than 0.7 mm, the strength is low and the blade-proof property is reduced. If the wire diameter exceeds 1.0 mm, the flexibility is deteriorated and the wearability is lowered. To do.

As a method for coating the stranded wire 2 with the thermoplastic resin 3, for example, it is manufactured by extrusion molding. The coating thickness of the thermoplastic resin 3 covering the stranded wire 2 is preferably 0.5 to 1.0 of the wire diameter of the stranded wire 2, and in this case, when the wire diameter is less than 0.5, Adhesiveness of the weft core material layer 6 due to heat fusion is poor, shifts or moves at the intersection, and if it exceeds 1.0, it becomes hard and poor in flexibility and wearability is reduced.

As for the arrangement | positioning space | interval of the core wire 4 which coat | covered the thermoplastic resin, ie, the density between centimeters, 1.5-3.2 piece / cm is preferable. In this case, if the number is less than 1.5, the piercing resistance is reduced to 100 N or less, and the cutting edge may penetrate the protective fiber material 7 by 7 mm or more. Moreover, when it exceeds 3.2, the space | gap between the core wires 4 will become narrow, and air permeability will fall, and when worn, there is stuffiness and stickiness. It is desirable that the air permeability be secured in a JIS L 1096 (Fragile type method) air permeability test so as to secure an air permeability value of 200 ml / cm 2 · sec or more.

In addition, as a method of heat-sealing the meridian material layer 5 and the weft core material layer 6, for example, the meridian material layer 5 and the weft core combined in a lattice shape as shown in FIG. 2 between heated plate-shaped molds. As shown in FIG. 4A, the material layer 6 is sandwiched between the upper and lower sides of the contact 9 and the thermoplastic resin 3 of the contact 9 is fused and integrated as shown in FIG. 4B. To do. In this case, it is preferable to heat-seal so that the height T2 at the intersection 9 is 75 to 85% of the original height T1. This is because if it is less than 75%, the degree of flexibility of the protective fiber material is lowered, and if it exceeds 85%, the adhesiveness may be lowered.

This protective fiber material 7 has a piercing resistance (NIJ (Standard National Judicial Research Standard) Standard-0115.00 P1) standard blade with a penetration length of 7 mm or less if the blade is 100 N or more. Sex is obtained.

In the above description, the interval (gap) between the adjacent core wires 4 is shown as one core wire 4, but the core wires 4 of the warp core material layer 5 and the weft core material layer 6 are shown in FIG. As shown in FIG. 6, two core wires 4 may be arranged in parallel and the gap portion may be one core wire 4, or three core wires 4 may be arranged in parallel as shown in FIG. As a whole, the density between centimeters should just be the range of 1.5-3.2 piece / cm. Further, in the above description, the case where the weft core material layer 6 is stacked on the meridian material layer 5 at right angles has been described, but an obliquely stacked structure may be used.

Measurement Method (1) The piercing resistance force is static and dynamic. As shown in FIG. 7, the static piercing resistance force is placed on a pedestal 10 with a spacing of 5 mm, and a protective fiber material 7 is placed on the NIJ (US National Forensic Research Standards) Standard-0115.00 P1) Create a blade 11 conforming to the standard, and use a universal tensile tester (shimdzu AGS-10KNG) as a protective fiber material for measuring blades in a compression mode at a constant speed of 20 mm / min. 7 was vertically entered, and the maximum strength (N) at the time of penetration was measured.

(2) Dynamic piercing strength (resistance)
The dynamic piercing tester shown in FIG. 8 is used, and the packing material 12 is composed of 2 mm of rubber (Shore hardness A45-50) having a thickness of about 6 mm in accordance with NIJ (US National Forensic Research Standard) Standard-0115.00 P1 standard. A total of four layers were laminated, one layer of polyethylene foam (Shore hardness A14) having a thickness of about 30 mm and one layer of neoprene sponge (Shore hardness A20 to 30) having a thickness of about 6 mm. Next, from a height indicating a predetermined energy amount, the measuring blade 11 attached to a columnar weight was freely dropped vertically onto the protective fiber material 7, and the penetration length (mm) of the blade was measured.

(3) Air permeability test Air permeability test Measured according to JIS L 1096 (Fragile type method), the degree (ml / cm 2 · sec) of the internal and external gas phase of the material that can pass through the protective fiber material 7 was measured.

(4) Flexibility test The diagonal line of the protective fiber material 7 is fixed to the edge of a square horizontal jig 13 as shown in FIG. 9, and the protruding triangle end point is vertically 50 mm with a 10 mmφ round bar 14. The maximum load (N) when pushed in was measured.

Sample Preparation Method Using SUS304 as a high-strength fiber, a stranded wire having a wire diameter of 1.0 mm is formed by 7 × 7 strand cross-strands, and the outer diameter of the core wire is coated with thermoplastic polyurethane on the surface. A protective fiber material of 0 mm was prepared. The arrangement of the transcore material layer 5 and the weft core material layer 6 was changed, and the following samples A to G in which the contact points of the core wires 4 were heat-sealed at 80% of the original height were prepared.

Sample A One protective fiber material for every three gaps (1.3 cm / cm density between centimeters)
Sample B One protective fiber material for every two gaps (density between centimeters 1.7 / cm)
Sample C One protective fiber material for each gap (density between centimeters 2.5 / cm)
Sample D: Two protective fiber materials arranged in parallel and spaced by one gap (density between centimeters: 3.3 / cm)
Sample E Three protective fiber materials arranged in parallel and spaced by one gap (density between centimeters 3.8 / cm)
Sample F 4 protective fiber materials arranged in parallel and spaced by 1 gap (density between centimeters 4 / cm)
Sample G Five protective fiber materials are juxtaposed and spaced by one gap (density between centimeters 4.2 / cm)

The relationship between the air permeability (ml / cm 2 · sec) and the flexibility (N) due to the change in the density between centimeters (number of yarns / cm) of Sample A to Sample G was measured, and the results are shown in FIG. From the results shown in FIG. 10, the flexibility increases as the density between centimeters increases, but conversely, the air permeability decreases. An air permeability of 200 ml / cm 2 · sec or more can be secured when the density between centimeters is 1.5 lines / cm or more. In addition, the degree of flexibility is 3 (N) or less in view of wearability, and the density between centimeters at that time is 3.2 pieces / cm or less, and the density between centimeters is preferably in the range of 1.5 to 3.2 pieces / cm. It is.

Further, the relationship between the static piercing strength (N) and the flexibility (N) due to the change in the density between centimeters (number of yarns / cm) of Sample A to Sample G was measured, and the result is shown in FIG. From the results of FIG. 11, the static piercing strength and flexibility increase with the increase in density between centimeters. The static piercing strength (bladeproof property) can be secured when the density between centimeters is 1.5 lines / cm or more. In addition, the degree of flexibility is 3 (N) or less in view of wearability, and the density between centimeters at that time is 3.2 lines / cm or less, and the density between centimeters is still in the range of 1.5 to 3.2 lines / cm. Is preferred.

(Example)
Using SUS304 as a high-strength fiber, a stranded wire having a wire diameter of 1.0 mm is formed by 7 × 7 strand cross-strands, and this surface is coated with thermoplastic polyurethane to protect the core wire with an outer diameter of 1.5 mm. Fabric material was created. Examples 1 to 3 were made by changing the density between the centimeters of this material and changing the heat-sealing height at the intersection of the core material layer 5 and the weft core material layer 6. For each of these examples, the static piercing strength and dynamic piercing strength (penetration length) at the time of free fall energy 12 (J), air permeability, and flexibility were measured, and the results are shown in Table 1.

For comparison, Comparative Examples 1 to 3 in which the density between the centimeters of the core wire 4 of Example 1 is changed to change the heat-sealing height of the intersection of the core material layer 5 and the weft core material layer 6 are created. In addition, a stranded wire having a wire diameter of 1.0 mm is formed by 7 × 7 strand cross-strands, and the surface is coated with thermoplastic polyurethane so that the outer diameter of the core wire is 2.5 mm, and the density between centimeters is two. Comparative Example 4 was prepared with a thickness of / cm. For each of these comparative examples, the static piercing strength and the dynamic piercing strength at the time of free fall energy 12 (J), air permeability, and flexibility were measured, and the results are also shown in Table 1.

From the results in the above table, the present invention has a blade-proof performance, is lightweight, has a feeling of discomfort when worn for a long time while maintaining flexibility and breathability, especially when used in the summer, and is less worn and sticky. A protective fiber material excellent in comfort and a method for producing the same can be obtained.

It is sectional drawing of a core wire. It is a perspective view of the fiber material for protection. (A) is a top view of a meridian material layer, (B) is a top view of the protective fiber raw material which piled up the weft core material layer on the meridian material layer. (A) is sectional drawing before the heat sealing | fusion which laminated | stacked the weft core material layer on the meridian material layer, (B) is sectional drawing of the fiber material for protection after heat sealing | fusion. FIG. 3 is a plan view of a protective fiber material in which two core wires of a meridian material layer and a weft core material layer are arranged in parallel and a gap portion is one core wire. FIG. 3 is a plan view of a protective fiber material in which three core wires of a meridian material layer and a weft core material layer are arranged in parallel and a gap portion is formed by two core wires. It is a front view of the testing machine which measures static stab resistance. It is a front view of the testing machine which measures dynamic piercing strength. It is a perspective view of the testing machine which measures a softness | flexibility. It is a graph which shows the relationship between air permeability and softness | flexibility (N) by the change of the density between centimeters (the number of yarns / cm). It is a graph which shows the relationship between static piercing strength (N) and softness | flexibility (N) by the change of the density between centimeters (the number of yarns / cm).

1 High strength fiber
2 Stranded wire
3 Thermoplastic resin
4 core wire
5 core material layer
6 Weft core layer
7 Protective fiber material
9 Intersection
10 pedestal
11 Cutlery
12 Packing material
13 Jig
14 Round bar

Claims (3)

As a high-strength fiber of a metal wire or a plastic wire, using a fiber having a tensile strength of 12 g / d or more and a twisted wire diameter of 0.7 to 1.0 mm, a stranded wire obtained by twisting a plurality of these high-strength fibers, A core wire covered with a thermoplastic resin having a wire diameter of 0.5 to 1.0 is drawn in parallel with a centimeter density of the core wire of 1.5 to 3.2 pieces / cm in parallel. A core material layer is formed, on which a core wire shifted in angle with the alignment direction of the meridian material layer is arranged in parallel with an interval to form a weft core material layer, and the core wire of the meridian material layer A protective fiber material characterized in that the contact point between the core wire and the core wire of the weft core material layer is integrally formed by heat fusion at 75 to 85% of the original height. Protective fabric material of claim 1, wherein the twisted wire is formed by seven × 7 strands crossing twist. (1) As a high-strength fiber of a metal wire or plastic wire, a fiber having a tensile strength of 12 g / d or more and a twisted wire diameter of 0.7 to 1.0 mm is twisted by twisting a plurality of these high-strength fibers. Forming a line,
(2) impregnating a thermoplastic resin from the surface of this stranded wire, covering a thermoplastic resin having a strand diameter of 0.5 to 1.0 to form a core wire,
(3) The core wire is arranged in parallel at intervals of a centimeter density of the core wire of 1.5 to 3.2 centimeters / cm to form a core material layer, and the core material layer is drawn thereon. After forming the weft core material layer by aligning the core wire by shifting the alignment direction and the angle, the core wire has a density between centimeters of 1.5 to 3.2 centimeters / cm, and is arranged in parallel at intervals.
(4) The meridian material layer and the weft core material layer are heat-sealed at 75 to 85% of the original height so that the intersection of the core wire of the meridian material layer and the core wire of the weft core material layer is integrated. (5) A method for producing a protective fiber material.