KR101156127B1 - Hybrid sheet and protecting products comprising the same - Google Patents

Abstract

The present invention relates to a hybrid sheet and a protective device including the same, wherein the hybrid sheet comprises: (i) a high-strength fiber made of a high-strength yarn; (Ii) a shear thickening fluid impregnated in the high strength fiber; And (iii) a thermoplastic resin layer adhered to the high strength fiber body.

The hybrid sheet of the present invention exhibits excellent ballistic resistance, gum resistance, shock absorption, etc., even at a light weight, and effectively prevents the shear thickening fluid impregnated into the high strength fiber during use.

In addition, the protective device according to the present invention is light in weight and excellent in wearing comfort, but also excellent in ballistic resistance, anti-glare, shock absorption.

Sheets, hybrids, fibres, shear thickening fluids, protective equipment, aramids.

Description

Hybrid sheet and protecting products comprising the same

The present invention relates to a hybrid sheet and a protective device including the same, and more specifically, a thermoplastic resin layer is adhered onto a high-strength fiber impregnated with a shear thickening fluid (hereinafter referred to as "STF"). The present invention relates to a hybrid sheet which prevents the thickening fluid from solidifying during use and is excellent in ballistic resistance, gum resistance and shock absorption even at a light weight, and a protective device including the same.

Hereinafter, in the present invention, the term protective equipment is used in the sense including both shock-absorbing suits such as body armor, bulletproof board, sword suit, ski suit, and the like.

High-strength polyethylene sheet has been widely used as a bulletproof plate, which is a kind of conventional protective equipment, but there is a problem in that manufacturing cost is high and manufacturing is difficult.

As another conventional bulletproof plate, a bulletproof plate having a structure in which an aramid fabric laminate obtained by laminating a plurality of ceramic plates and aramid fabrics is laminated on each other has been widely used.

On the other hand, as a conventional body armor, aramid fabric laminate obtained by laminating a plurality of aramid fabrics has been widely used.

In the present invention, an aramid fabric means a fabric woven using warp and weft yarns using wholly aromatic polyamide (aka "aramid") multifilament.

However, since the aramid fabric constituting the conventional bulletproof plate or body armor consists of twisted and weft yarns, ie, twisted wholly aromatic polyamide multifilaments, the impact of bullets on the fabric There was a problem that the anti-ballistic performance was greatly deteriorated because the twisted part of the ground slope and the weft acted as a weak point, and due to the lack of anti-ballistic properties, several aramid fabrics had to be laminated so that the weight became heavy. There was a problem.

As another ballistic material, some aramid fabric laminates in which several aramid fabrics are impregnated with shear thickening fluid are used. However, the solvent of the thickening fluid impregnated in the aramid fabric is evaporated and the shear thickening fluid is solidified. As a result, the service life was shortened.

The present invention provides a hybrid sheet and a protective suit comprising the same for a long time because the shear thickening fluid impregnated in the high-strength fiber does not solidify in use while expressing excellent anti-ballistic, anti-glare and shock absorbing properties even at a light weight. To provide.

Hybrid sheet of the present invention for achieving the above object is (i) a high-strength fibrous body consisting of a high-tensile yarn; (Ii) a shear thickening fluid impregnated in the high strength fiber; And (iii) a thermoplastic resin layer adhered to the high strength fiber body.

Moreover, the protective suit of this invention is characterized by including the said hybrid sheet.

Hereinafter, the present invention will be described in more detail.

As an example of the hybrid sheet according to the present invention, a shear thickening fluid 2 is impregnated in the high-strength fiber body 1 made of a high-strength yarn, and the surface of the high-strength fiber body 1 is shown in FIG. The thermoplastic resin layers 3 are bonded to the and back surfaces, respectively.

1 is a schematic cross-sectional view of a hybrid sheet according to the present invention.

As another example of the hybrid sheet according to the present invention, a shear thickening fluid 2 is impregnated into the high-strength fibrous body 1 made of a high-strength yarn, and the front, back, and left sides of the high-strength fibrous body 1 are It has a structure bonded to each of the side and the right side.

The high strength fiber body is in the form of a woven fabric, a nonwoven fabric or a paper.

The thermoplastic resin layer is composed of polypropylene resin, polyester resin or polyamide resin, and the like, and is in the form of a film or a resin coating layer.

In the hybrid sheet according to the present invention, a thermoplastic resin layer is attached to a high-strength fiber impregnated with a shear thickening fluid, and effectively prevents the solvent in the shear thickening fluid from solidifying by evaporation during use. The absorption performance is favored.

The high strength fibers may be aramid fibers, polyimide fibers, polybenzoxazole fibers, wholly aromatic polyester fibers, high strength polyethylene fibers, high strength polyamide fibers or high strength polyester fibers. It is composed.

The shear thickening fluid (STF) is a fluid in which 10 to 1,000 nm of inorganic particles are filled in a nonvolatile and nontoxic solvent and dispersant at a concentration of 50% by weight or more.

Examples of the inorganic particles are silica particles, titanium dioxide particles, nanocarbon tubes, and the like. One example of the solvent is polyethylene glycol or ethylene glycol, and one example of the dispersant is ethanol or methanol.

The shear thickening fluid (STF) may be impregnated with 30 to 80% by weight relative to the total weight of the high-strength fiber.

High-strength fiber impregnated with shear thickening fluid (STF) plays a role of preventing the external impact from penetrating into the interior as the phase change occurs from the liquid phase to the solid phase when a sudden impact is applied from the outside with a bullet.

When the high-strength fiber body is a fabric, when the warp and weft yarn constituting the fabric has a twist, when the impact due to the bullet is applied to the high-strength fiber body, the twisted portion effectively distributes the applied impact to the entire area of the fiber body It acts as a weak point (Hak point) that interferes with this, and thus bulletproof performance can be greatly reduced.

In the present invention, in order to prevent the above phenomenon and to significantly improve the bulletproof performance, it is more preferable to configure the warp and weft yarn constituting the high-strength fabric with a high-strength yarn having no lead.

The high strength yarn is preferably composed of 400 ~ 1,000 monofilament having a single yarn fineness of 0.7 ~ 1.6 denier.

In addition, the tensile strength of the high strength yarn is preferably 22g / d or more.

However, in the present invention, the single yarn fineness and the number and tensile strength of the high strength yarn are not particularly limited.

On the other hand, when the high-strength fiber is a fabric, the tensile strength is 7,000 ~ 20,000N / 5㎝, it is preferable that the fabric structure is a plain weave or basket weave, the inclination density and weft density is that the level of 5 ~ 15 bone / cm each desirable.

However, the present invention does not specifically limit the tensile strength, structure, warp density and weft density of the high strength fabric.

The high-strength fibrous body can be manufactured by weaving the warp and weft density of 5 to 15 bones / cm with a tissue such as plain weave or basket weave using the unleaded high strength yarn described above as warp and weft. Can be.

On the other hand, the protective equipment according to the invention is characterized in that it comprises the hybrid sheet described above.

As shown in FIG. 2, the protective device according to the present invention may have a structure in which the laminate B in which the hybrid sheets are overlapped is laminated on one surface of the laminate A in which high-strength fibers are overlapped. As described above, the laminate B in which the hybrid sheets are overlapped is laminated on one surface of the laminate A in which high-strength fibers are overlapped, and the ceramic plate C is laminated on the other surface of the laminate A. As shown in FIG. 4, the laminate B in which the hybrid sheets are stacked may be stacked on both sides of the laminate A in which high-strength fibers are overlapped.

2 to 4 are schematic cross-sectional views of the protective equipment according to the present invention.

It is preferable that the said ceramic plate (C) is an alumina plate etc., and thickness is 2-12 mm.

If the thickness of the ceramic plate (C) is out of the above range, the ballistic resistance or the like is lowered or the weight is too heavy, which is not preferable.

On the other hand, the protective equipment according to the present invention has a bulletproof performance of 845.0 m / sec or more based on NATO 7.62 × 51mm FMJ (9.6g).

Bulletproof performance is measured by NIJ-STD-0101.04 method using NATO 7.62 × 51 mm (9.6 g) after leaving the prepared protective equipment at room temperature for 1 month.

The hybrid sheet according to the present invention has a light weight per unit area and is excellent in wearing comfort, but also has excellent anti-ballistic effect, anti-glare effect, shock absorbing effect, etc. It is useful as material.

In addition, the hybrid sheet according to the present invention effectively prevents the shear thickening fluid impregnated in the high-strength fibers during use, thereby exhibiting excellent antiballistic effect even after long use.

On the other hand, the protective clothing according to the present invention can express the desired anti-ballistic effect, the anti-glare effect, shock absorbing effect and the like even with a low weight per unit area including the hybrid sheet is good wear.

Hereinafter, the present invention will be described in more detail through Examples and Comparative Examples.

However, the present invention is not limited by the following examples.

Example  One

It consists of 1,000 mono-aromatic polyamide monofilaments with a single yarn fineness of 1.5 and has a tensile strength of 23g / d and no twisting, so that an all-aromatic multifilament with zero twist is used as the warp and weft yarns. Weaving of plain weave with a weft density of 10 bones / cm yielded aramid fabric of plain weave.

Next, 20 aramid fabrics prepared as described above were laminated to prepare an aramid fabric laminate (A).

On the other hand, it consists of 1,000 mono-aromatic polyamide monofilaments with a single yarn fineness of 1.5, and uses a wholly aromatic multifilament having a tensile strength of 23 g / d and a twist number of 0 per m as a warp and weft yarn, Weaving of plain weave with a weft density of 10 bones / cm produces aramid fabric of plain weave, which is immersed in a shear thickening fluid (STF) filled with 65% by weight of silica particles having a particle diameter of 100 nm in polyethylene glycol. Aramid fabric impregnated with 40% by weight of shear thickening fluid (STF) was prepared, and then a polypropylene film was attached to the front and back surfaces thereof to prepare a hybrid sheet. Subsequently, 20 sheets were laminated | stacked and the hybrid sheet laminated body (B) was manufactured.

Next, the protective sheet was prepared by laminating the hybrid sheet laminate (B) as shown in FIG. 1 on one surface of the aramid fabric laminate (A) prepared as described above.

Table 1 shows the results of evaluating the weight, ballistic performance, and the performance of the prepared protective equipment and the sword performance.

Example  2

A hybrid sheet laminate (B) was manufactured in the same manner as in Example 1, except that the number of sheets of the aramid fabric impregnated with 40% by weight of the shear thickening fluid (STF) was changed to 10 sheets during the manufacture of the hybrid sheet laminate (B). As described in Example 1, except that the hybrid sheet laminate (B) prepared as described above was laminated on each of the front and back surfaces of the aramid fabric laminate (A) prepared in Example 1, respectively. Protective equipment was prepared.

Table 1 shows the results of evaluating the weight, ballistic resistance, and sword performance of the prepared protective equipment.

Example  3

A hybrid sheet laminate (B) was manufactured in the same manner as in Example 1, except that the number of sheets of the aramid fabric impregnated with 40% by weight of the shear thickening fluid (STF) was changed to 10 sheets during the manufacture of the hybrid sheet laminate (B). As described above, the hybrid sheet laminate (B) prepared as described above is laminated on the surface of the aramid fabric laminate (A) prepared in Example 1, and the alumina plate (C) having a thickness of 2 mm is provided on the back surface. A protective equipment was prepared in the same manner as in Example 1 except for stacking.

Table 1 shows the results of evaluating the weight, ballistic resistance, and sword performance of the prepared protective equipment.

Comparative Example  One

It consists of 1,000 mono-aromatic polyamide monofilaments with a single yarn fineness of 1.5 and has a tensile strength of 23g / d and no twisting, so that an all-aromatic multifilament with zero twist is used as the warp and weft yarns. Weaving of plain weave with a weft density of 10 bones / cm yielded aramid fabric of plain weave.

Next, 20 aramid fabrics prepared as described above were laminated to prepare an aramid fabric laminate (A).

On the other hand, it consists of 1,000 mono-aromatic polyamide monofilaments with a single yarn fineness of 1.5, and uses a wholly aromatic multifilament having a tensile strength of 23 g / d and a twist number of 0 per m as a warp and weft yarn, Weaving of plain weave with a weft density of 10 bone / cm produces aramid fabric of plain weave, which is immersed in a shear thickening fluid (STF) filled with 65% by weight of silica particles having a particle diameter of 100 nm in polyethylene glycol. An aramid fabric impregnated with 40% by weight of shear thickening fluid (STF) (which is a fabric to which the thermoplastic resin layer is not bonded) was prepared, and then 20 sheets were laminated to prepare an STF-impregnated aramid fabric laminate.

Next, a protective equipment was prepared by laminating the STF-impregnated aramid fabric laminate on one surface of the aramid fabric laminate (A) prepared as described above.

Table 1 shows the results of evaluating the weight, ballistic performance, and the performance of the prepared protective equipment and the sword performance.

Comparative Example  2

A protective fabric was prepared by laminating each of the STF-impregnated aramid fabric laminates prepared in Comparative Example 1 on each of the aramid fabric laminates (A) prepared in Example 1, and the back surface thereof.

Table 1 shows the results of evaluating the weight, ballistic resistance, and sword performance of the prepared protective equipment.

Comparative Example  3

A protective fabric was prepared by laminating the STF-impregnated aramid fabric laminate prepared in Comparative Example 1 on the surface of the aramid fabric laminate (A) prepared in Example 1 and laminating the alumina plate (C) having a thickness of 2 mm on the back surface. .

Table 1 shows the results of evaluating the weight, ballistic resistance, and sword performance of the prepared protective equipment.

Property evaluation result of protective equipment division Gross weight (g) Bulletproof performance
(ft / s) Inspection performance
Penetration Distance: mm Example 1 3.080 847.0 15 Example 2 3.060 853.0 13 Example 3 3.070 870.3 10 Comparative Example 1 3,060 720.0 28 Comparative Example 2 3,040 740.7 30 Comparative Example 3 3,050 762.9 29

In the properties of the table, the sword performance (penetration distance) of the double edged edge with a sharp blade of 2.6kg at the drop height of 1.35m is produced when the sample is left at room temperature for 1 month after free-falling. After measuring the distance to penetrate 10 times is shown as their average value.

In addition, the ballistic resistance is measured by the NZJ-STD-0101.04 method 10 times using a sample (protective device) left at room temperature for one month after the production is shown as their average value.

1 is a schematic cross-sectional view of a hybrid sheet according to the present invention.

2 to 4 are schematic cross-sectional views of the protective device according to the present invention.

* Code description of main parts of drawing

DESCRIPTION OF SYMBOLS 1: High strength fiber body 1a: Weft of high strength fiber body

1b: slope of high strength fiber body 2: shear thickening fluid

3: thermoplastic resin layer 4: high strength fiber impregnated with shear thickening fluid

A: A laminate in which high-strength fibers made of high-strength yarns are stacked.

B: The laminate in which the hydride sheets are stacked.

C: ceramic plate

Claims (20)

An aramid fabric laminate in which both warp and weft yarns are made of aramid yarns and are formed by overlapping aramid fabrics having zero twist; And A hybrid sheet laminate formed to cover at least one surface of the aramid fabric laminate, The hybrid sheet laminate, Shear Thickening Fluid (Shear Thickness Fluid) formed by filling inorganic particles with a particle diameter of 10 ~ 1,000 nm in ethanol or methanol as a dispersant and ethylene glycol or polyethylene glycol as a solvent at a concentration of 65% by weight or more, both inclined and weft yarn aramid At least 10 hybrid sheets formed by yarn impregnating and impregnating an aramid fabric having zero twist and adhering a thermoplastic resin layer to at least the front and back surfaces of the aramid fabric impregnated with at least 40% by weight of the shear thickening fluid Protective equipment, characterized in that formed by stacking more than one. delete delete The protective device according to claim 1, wherein the thermoplastic resin layer is composed of one selected from polypropylene resin, polyester resin, and polyamide resin. delete delete The protective device of claim 1, wherein the inorganic particles are at least one selected from silica particles, titanium dioxide particles, and nanocarbon tubes. delete delete The protective device according to claim 1, wherein the tensile strength of the high-strength fiber body is 7,000-20,000 N / 5cm. The protective device according to claim 1, wherein the high-strength yarn is composed of 400 to 1,000 monofilaments having a single yarn fineness of 0.7 to 1.6 denier. The protective device according to claim 1, wherein the high-strength yarn has a tensile strength of 22 g / d or more. The protective device according to claim 1, wherein the tissue of the high-strength fibers is one tissue selected from plain weave and basket weave. delete The protective device according to claim 1, wherein the high-strength fibrous body is in the form of one type selected from woven fabric, nonwoven fabric, and paper. The protective device according to claim 1, wherein the thermoplastic resin layer is in the form of one kind selected from the form of a film and the form of a resin coating layer. delete delete delete The protective device according to claim 1, wherein a ceramic plate is laminated on the other surface of the aramid fabric laminate.

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