KR20120028354A - Bulletproof fabric and bulletproof vest - Google Patents

Abstract

PURPOSE: A bulletproof fabric and cloth with excellent bulletproof performance is provided to enhance flexibility and to prevent reduction of bulletproof property. CONSTITUTION: A bulletproof fabric contains wholly aromatic polyamide multifilament as a weft and a warp. A method for fabricating the fabric comprises: a step of weaving a fabric; and performing water repellency process of the fabric. The water repellency process comprise a process of dipping the fabric in a water repellent agent containing 0.1-1 weight parts of silicon oil and 0.5-10 weight parts of isopropyl alcohol.

Description

Bulletproof Fabric and Bulletproof Vest}

The present invention relates to a bulletproof fabric and body armor, and more particularly, to a bulletproof fabric and body armor having excellent ballistic performance and fit.

Body armor is a garment developed to protect the human body from the breaking of bullets or shells. Therefore, the most important requirement for the body armor is bulletproof performance how to protect the human body, and in addition, wearing a body armor should not be inconvenient to move in the state of wearing, wearing comfort is also as important as the bulletproof performance. . In other words, if the weight is too heavy or inflexible, the fit is poor, even if excellent ballistic performance can not be recognized as a good body armor.

As one of the conventional body armor, body armor made by laminating dozens of nylon fabrics or body armor made by laminating dozens of nylon fabrics and aramid fabrics alternately, in this case, in order to obtain high ballistic performance, Since it has to increase the weight of the body armor is too large has had the disadvantage of falling fit.

Other conventional body armors include a laminate in which a nylon fabric is laminated, or a body armor in which a thermosetting resin is impregnated or laminated in a laminate in which a nylon fabric and an aramid fabric are alternately laminated. There is a disadvantage in that the fall is greatly reduced.

As described above, in the past, efforts to improve the bulletproof performance and fit of the body armor have been steadily progressed through research and development of aspects such as the structure of the body armor or the material of the fabric constituting the body armor. However, the conventional body armor does not have satisfactory results in terms of wearing comfort such as flexibility even if the anti-ballistic performance is improved, and also in the anti-ballistic performance, even if the initial anti-ballistic performance is somewhat superior, the anti-ballistic performance is long-term use. It is showing a problem of sharp deterioration.

The present invention has been devised to solve the above problems, the present invention is excellent in wearing comfort, such as flexibility, bulletproof fabric and body armor using the bulletproof performance that can be minimized even in the long-term use as well as the initial ballistic performance The purpose is to provide.

The present inventors have steadily made efforts to improve the characteristics of bulletproof fabrics obtained by optimizing a series of process conditions for manufacturing bulletproof fabrics, and as a result, when changing the water repellent composition used in the water repellent treatment process of bulletproof fabrics, The present invention was completed by confirming that the same fit and antiballistic performance can be improved, and that the antiballistic performance can be prevented from being lowered even when used for a long time.

Specific technical means of the present invention for achieving the above object is as follows.

The present invention is a process of weaving a fabric consisting of warp and weft; And it comprises a step of water-repellent treatment of the fabric, wherein the water-repellent treatment step is 25 to 35% by weight of a hardoxylated perfluoroalkylethyl acrylate copolymer, dipropylene glycol ( Dipropylene glycol) 0.1 to 1 parts by weight and 0.5 to 10 parts by weight of isopropyl alcohol (isopropylalcohol) compared to 100 parts by weight of the aqueous solution in 1 to 5% by weight aqueous solution of a composition consisting of 10 to 15% by weight and 50 to 65% by weight of water It provides a method for producing a bulletproof fabric, characterized in that comprising the step of immersing the fabric in the added water repellent.

Here, the weaving process may be made of a process of weaving into plain or basket weaving using the wholly aromatic polyamide multifilament as a warp and weft.

The fabric refining process may be performed before the water repellent treatment.

The present invention also provides an antiballistic fabric comprising warp and weft yarns made of wholly aromatic polyamide multifilament, and having a stiffness of 0.20 to 0.85 Kgf as measured by the circular bend method.

The present invention is also made of warp and weft yarn made of wholly aromatic polyamide multifilament, ballistic fabric characterized in that the initial water repellency measured by the spray test method is 90 to 100, water repellency after 100 times of friction is 80 or more To provide.

Here, the anti-ballistic fabric may have a water repellency of 500 or more after 500 rubs.

According to the present invention performing a water-repellent treatment process for the fabric using the new water repellent composition as described above has the following effects.

First, the anti-ballistic fabric and body armor for producing according to the present invention has the effect of increasing the flexibility to increase the fit.

Secondly, the anti-ballistic fabric and body armor according to the present invention have increased water repellency to prevent the deterioration of the anti-ballistic properties due to water absorption, and in particular, the water repellency after several hundred times of friction as well as the initial water repellency can be maintained in a long period of use In addition, there is an effect that the degradation of bulletproof characteristics can be minimized.

Hereinafter, embodiments of the present invention will be described in detail.

1. Bulletproof fabrics and body armor

Bulletproof fabrics according to the present invention is produced through the process of preparing the fabric for manufacturing the fabric, the process of weaving the fabric with the warp and weft weaving fabric, the process of refining the fabric, and the process of water repellent fabric.

The process of preparing the fabric for manufacturing the fabric may be made of a process for producing a wholly aromatic polyamide multifilament. The wholly aromatic polyamide multifilament produces an aromatic polyamide polymer by polymerizing an aromatic diamine and an aromatic dieside chloride in a polymerization solvent, and then dissolving the aromatic polyamide polymer in a concentrated sulfuric acid solvent to prepare a spinning dope. After spinning the spinning dope through the spinneret can be prepared through a process of producing a filament by solidifying the spinning.

The wholly aromatic polyamide multifilament may be composed of 400 to 1,000 monofilament having a fineness of 0.7 to 1.6 denier. If a fine monofilament having a fineness of 1.6 denier or less is used, a larger number of monofilaments may be used to obtain multifilaments of the same fineness, thereby improving the absorbency of the impact of the fabric produced. If a fineness of 0.7 denier or less monofilament is used, weaving may be poor.

The wholly aromatic polyamide multifilament is advantageous in improving the ballistic resistance of the fabric is produced that the tensile strength of 22g / d or more. However, in the present invention, the fineness and number of the wholly aromatic polyamide monofilament and the tensile strength of the wholly aromatic polyamide multifilament are not particularly limited.

The process of weaving the fabric may comprise a process of weaving the warp and weft of the wholly aromatic polyamide multifilament, and the plain or basket weaving as a fabric structure. The inclined density and the weft density may be 5 to 15 books / cm level, respectively, and the resulting fabric may have a tensile strength in the range of 5,000 to 10,000 N / 5 cm it may be desirable for improved ballistic resistance. However, the present invention does not specifically limit the tensile strength, the warp density and the weft density of the fabric.

The process of refining the fabric is a process of removing the oil or foreign matter adhering to the wholly aromatic polyamide multifilament constituting the fabric, and if a water repellent treatment process is performed after the refining process without performing such a refining process, The process may not be performed smoothly and the flexibility of the fabric may be reduced.

The process of refining the fabric may be carried out using a surfactant such as NaOH or Na ₂ CO ₃ at 40 ℃ to 100 ℃, after the surfactant treatment is followed by a washing step and a drying step.

The process of water repellent treatment of the fabric is a process of treating the fabric so as not to absorb moisture, and the wholly aromatic polyamide multifilament constituting the fabric is generally deteriorated in physical properties when the moisture is absorbed for a long time and eventually the ballistic characteristics of the fabric gradually increase. Since the fall problem occurs, water repellent treatment on the fabric is to prevent the deterioration of ballistic resistance due to water absorption.

As described above, the water repellent treatment process may be performed by completely removing the foreign matter adhered to the surface of the fabric through a refining process, and then immersing the fabric in the water repellent and drying.

The water repellent is a composition consisting of 25 to 35% by weight of hardoxylated perfluoroalkylethyl acrylate copolymer, 10 to 15% by weight of dipropylene glycol and 50 to 65% by weight of water. It is prepared by containing 0.1 to 1 parts by weight of silicone oil and 0.5 to 10 parts by weight of isopropyl alcohol (isopropylalcohol) relative to 100 parts by weight of the aqueous solution in an aqueous solution of 1 to 5% by weight.

The hardoxylated perfluoroalkyl ethyl acrylate copolymer has a role of imparting water repellency to the fabric, when the addition amount is less than 25% by weight, it is difficult to expect the water repellency of the desired fabric, the addition amount is 35% by weight If exceeded, the increase in water repellency is not great, but the fabric may be less flexible.

The dipropylene glycol serves to uniformly disperse the components of the water repellent composition, when the amount is less than 10% by weight of the dispersing function may fall, and when the amount is more than 15% by weight relatively The composition ratio for providing water repellency and flexibility may be reduced, thereby reducing the water repellency and flexibility of the fabric.

When the concentration in the aqueous solution of the composition is less than 1% by weight, the water repellent effect may be reduced, and when the concentration is more than 5% by weight, the flexibility of the fabric may be reduced due to the excessive attachment of solids to the surface of the fabric.

The silicone oil is used to emulsify the fabric as Si-O-Si as a base skeleton, and is used by emulsification. If the amount is less than 0.1 part by weight, it is difficult to expect the flexibility of the desired fabric, If it exceeds 1.0 parts by weight, the increase in flexibility is not great, but the water repellency of the fabric may be rather poor.

The isopropyl alcohol serves to easily penetrate the water repellent to the fabric so that the water repellency and flexibility can be maintained for a long time, when the addition amount is less than 0.5 parts by weight of the water repellent may be somewhat inferior If the added amount exceeds 10 parts by weight, the water repellency and flexibility of the fabric may be rather deteriorated.

The water-repellent agent of the composition is prepared by stirring sufficiently, the fabric is immersed in the prepared water-repellent agent, the water-repellent agent is impregnated in the fabric, after the padding (padding) process and dried to complete the water-repellent process.

After the water repellent process may be carried out a heat treatment process on the fabric. The heat treatment process may be performed at 120-200 ° C. for about 15-150 seconds. At this time, if the heat treatment temperature is less than 120 ° C. or the heat treatment time is less than 15 seconds, the water repellent treatment may be deteriorated. If it exceeds 150 seconds, it can damage the fabric.

The anti-ballistic fabric according to the present invention produced by the above process is made of warp and weft yarn made of wholly aromatic polyamide multifilament, the flexibility (flexibility) is in the range of 0.20 ~ 0.85Kgf. The stiffness is a measure of the degree of flexibility of the fabric and is measured by the circular bend method according to ASTM D 4032. When the stiffness is less than 0.20 Kgf, the strength of the fabric may be lowered, and thus the bulletproof property may be lowered.

In addition, the anti-ballistic fabric according to the present invention is made of warp and weft yarn made of wholly aromatic polyamide multifilament, the initial water repellency is 90 ~ 100, the water repellency after 100 times the friction is 80 or more. The water repellency is measured by the spray method according to ISO 4920: 1981, and the friction against the fabric is performed using a Siefer type wear tester SAT-250. As such, the anti-ballistic fabric according to the present invention maintains excellent water repellency of the water repellency of 80 or more even after 100 times of friction as well as excellent water repellency of the original water repellency of 90 to 100. In addition, the anti-ballistic fabric according to the present invention will maintain its water repellency still more than 80 after 300 and 500 times rubbing. Therefore, it can be seen that even after long-term use, excellent water repellency is maintained, thereby minimizing deterioration in ballistic resistance due to absorption of moisture.

In addition, the present invention provides a body armor made of a laminate in which 10 to 50 sheets of the fabric having the above characteristics are laminated. Such a body armor is excellent in flexibility and water repellency by using the above-described fabric, the degradation of its properties can be minimized by long-term use.

2. Examples and Comparative Examples

Example  One

The woven fabric was made of plain weave with a warp density and a weft density of 10 yarns / cm, using a wholly aromatic multifilament consisting of 1,000 wholly aromatic polyamide monofilaments having a fineness of 1.0 as warp and weft yarns, respectively. The fabric was then surfactant treated, washed with water and dried.

Thereafter, a 2.5% by weight aqueous solution of the composition consisting of 30% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 15% by weight of dipropylene glycol and 55% by weight of water was added. After preparing and adding 0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol (isopropylalcohol) to 100 parts by weight of the aqueous solution, the mixture was sufficiently stirred to prepare a water repellent, and the fabric was immersed in the prepared water repellent to impregnate the water repellent and padding. Dry through a) process to produce a bulletproof fabric.

Example  2

In Example 1 described above, 1 of the composition consisting of 30% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 15% by weight of dipropylene glycol and 55% by weight of water Bulletproof fabrics were prepared in the same manner as in Example 1, except that a wt% aqueous solution was prepared.

Example  3

In Example 1 described above, 5 of the composition consisting of 30% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 15% by weight of dipropylene glycol and 55% by weight of water Bulletproof fabrics were prepared in the same manner as in Example 1, except that a wt% aqueous solution was prepared.

Example  4

In Example 1 described above, 4 of the composition consisting of 25% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 10% by weight of dipropylene glycol and 65% by weight of water Bulletproof in the same manner as in Example 1 except for preparing a water-based aqueous solution and adding 0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol (isopropylalcohol) relative to 100 parts by weight of the aqueous solution and sufficiently stirred to prepare a water repellent A fabric was prepared.

Example  5

In Example 4 described above, 2 of the composition consisting of 25% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 10% by weight of dipropylene glycol and 65% by weight of water Bulletproof fabrics were prepared in the same manner as in Example 4, except that a wt% aqueous solution was prepared.

Example  6

In Example 4 described above, 5% of the composition consisting of 25% by weight of the hardoxylated perfluoroalkylethyl acrylate copolymer, 10% by weight of dipropylene glycol and 65% by weight of water. Bulletproof fabrics were prepared in the same manner as in Example 4, except that a wt% aqueous solution was prepared.

Comparative example

In Example 1 described above, 3% by weight of an aqueous solution of a composition consisting of 60% by weight of hydroxylated perfluoroalkylethyl acrylate copolymer and 40% by weight of water was prepared as a water repellent agent. Bulletproof fabrics were prepared in the same manner as in Example 1.

Table 1 summarizes the water repellent composition for the production of bulletproof fabrics according to the above Examples and Comparative Examples.

division Water repellent composition Example 1 2.5 % by weight aqueous solution of a composition consisting of 30% by weight hardoxylated perfluoroalkyl ethyl acrylate copolymer, 15% by weight dipropylene glycol and 55% by weight water ;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution Example 2 1 wt% aqueous solution of the same composition as in Example 1;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution Example 3 5 wt% aqueous solution of the same composition as in Example 1;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution
Parts by weight Example 4 25% by weight of a hardoxylated perfluoroalkyl ethyl acrylate copolymer,
4 % by weight of the composition consisting of 10% by weight dipropylene glycol and 65% by weight water
Aqueous solution ;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution
Parts by weight Example 5 2 wt% aqueous solution of the same composition as in Example 4;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution
Parts by weight Example 6 5% by weight aqueous solution of the same composition as Example 4;
0.3 parts by weight of silicone oil and 5 parts by weight of isopropyl alcohol relative to 100 parts by weight of the aqueous solution
Parts by weight Comparative example 3% by weight aqueous solution of a composition consisting of 60% by weight hydroxylated perfluoroalkyl ethyl acrylate copolymer and 40% by weight water

3. Experimental Example

Lecture measure

100 mm × 200 mm samples were prepared by cutting the bulletproof fabrics prepared according to the above examples and comparative examples, and in the circular bend method according to ASTM D 4032, specifically, the size of the pedestal is 102 mm × 102 mm × 6 mm and drill a 38.1 mm diameter hole and fold the sample prepared on it in half, place it on the pedestal, and measure the force pushing down the fabric into the 38.1 mm diameter hole when pressing the sample with the bar from above. Lecture was measured by. The measured values are shown in Table 2 below.

division  Lecture degree (Kgf) Example 1 0.50 Example 2 0.35 Example 3 0.65 Example 4 0.51 Example 5 0.36 Example 6 0.55 Comparative example 0.87

first Water repellency  Measure

250 mm × 250 mm samples were prepared by cutting the bulletproof fabrics prepared according to the above Examples and Comparative Examples, and the initial water repellency was measured by the spray method according to ISO 4920: 1981 for each of the prepared samples. . The measured values are shown in Table 3 below.

division  Initial water repellency Example 1 100 Example 2 90 Example 3 100 Example 4 100 Example 5 90 Example 6 100 Comparative example 100

friction After water repellency  Measure

Samples of 250 mm × 250 mm were prepared by cutting the spinning fabrics prepared according to the Examples and Comparative Examples, and 100 times using a Siefer type wear tester (SAT-250) for each prepared sample. 300 rubs and 500 rubs. After each rubbing sample, water repellency after rubbing was measured by the spray method according to ISO 4920: 1981. The measured values are shown in Table 4 below.

Friction Water repellency after friction
Example 1
100 100 300 90 500 80
Example 2
100 90 300 80 500 80
Example 3
100 100 300 90 500 90
Example 4
100 100 300 90 500 80
Example 5
100 90 300 80 500 80
Example 6
100 100 300 90 500 80
Comparative example
100 100 300 90 500 80

Claims (3)

Including wholly aromatic polyamide multifilaments as warp and weft yarns,
Bulletproof fabric characterized in that the water repellency of the first 90 to 100, 100 or more after 100 times the friction measured by the spray test method. The method of claim 1,
The anti-ballistic fabric is a ballistic fabric, characterized in that the water repellency after the friction 500 times 80 or more. Body armor according to claim 1 or 2 comprising a laminate formed by laminating the bulletproof fabric of 10 to 50 sheets.