KR940001038B1 - Method of manufacturing bulletproof cloth - Google Patents

Abstract

A belletproof cloth is manufactured by twining Poly-P-Phenylene terephthalamide filament yarn of 0.7-1.5-denier single yarn, 1,000-2,200 number of filaments, and more than 20 g/d strength to 8-10 T/cm, spinning it into a weft thread of 30-35 lines/inch, and performing water-repellent treatment thereupon to weave a cloth having more than 1,500 feet/sec. bulletproof and 80 % water-repellency, thereby providing flexible bulletproof cloth having excellent bulletproof property by simple process while reducing weight thereof.

Description

Manufacturing method of bulletproof cloth

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for producing anti-ballistic garments obtained by carrying out water repellent treatment after weaving poly-P-Phenylene terephthalamide (hereinafter referred to as aramid fibers) at high density.

Conventionally, several to tens of layers of nylon fabrics are laminated or alternately laminated with aramid fibers, and methods for manufacturing bulletproof cloth for impregnation with a thermosetting resin or in the form of a laminate have been proposed.

Such a manufacturing method increases the weight due to the use of nylon alone or partially laminated with aramid fibers, while lowering the ballistic resistance, and impregnating or laminating thermosetting resins (phenol, epoxy, polyvinyl butylene, etc.) to improve this. This improved the ballistic resistance, but there was a drawback that the flexibility of the fabric was lost by the treatment of the thermosetting resin.

Therefore, in the present invention, in order to improve these problems, the weight reduction and flexibility in the simple process of weaving and water-repellent treatment at high density with only the aromatic polyamide wire oil alone without treating the thermosetting resin, etc., have excellent ballistic resistance. It is a method of manufacturing a body armor forge.

When explaining the present invention in detail, the filament fibers (mono-pyramid is 1.5 denier or less) of the wholly aromatic polyamide (Poly-P-Phenylene terephthalamide) is twisted to 8-10 T / 10cm to each warp and weft 30 After high-density weaving at -35 sheets / inch, treatment with fluorine (F) or silicone-based water repellent agent can shorten the manufacturing process, reduce weight, have excellent ballistic resistance and water repellency, and do not use resin 2 The body armor for body armor can be manufactured which gives flexibility.

Here, the filament fiber of the wholly aromatic polyamide is 1,500 denier, the number of filament is 1,000-2,200, the monofilament fineness is ballistic by using a high-density filament yarn of 1.5 denier, preferably 0.7-1.5 denier This can be increased because the thinner and more filaments in the same denier may increase the absorbency against impact.

Since aramid fibers have a large number of filaments, in order to increase the weaving properties during weaving, especially high density weaving, and to increase the strength of the yarn to a certain level, aramid fibers are given about 8-10T / 10cm. In the case of the following, we cannot achieve the purpose of increasing the strength to the required level, and weaving is degraded because it may cause cutting due to warping, weeping and the like during weaving.

In the case of 10T / 10cm or more, by providing excessive lead, the strength is lowered, and the weaving is also poor due to the generation of snarl.

Since body armor is primarily intended to protect against secondary impacts from debris, fabric weaves should be designed with a cover density of 30-35 minutes / inch and the tissue should be matte.

This woven fabric is impregnated and treated with 0.5-0.3% (ows) of known fluorine (F) -based or silicone-based water repellent, and then heat-treated at 120-150 ° C. for 30-60 seconds to provide a water repellent function on the surface of the fabric. I can grant it.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the present invention is not limited to the examples.

Example 1

Filament fiber of poly-P-Phenylene-terphthalamide (Filament fiber 1,500D / 1,000F (Single yarn daily 1.5d, Strength: 20g / d)) After weaving a high-density into a matt (Matt) structure having a density of 34 × 34 pattern / inch, and heat-treated at 150 ℃ 30 seconds with 1.5% (ows) fluorine (F) -based water-repellent agent.

The ballistic resistance was measured by setting the total weight to 920 g as a collective, 8 ply of any size.

Example 2

Filament fibers 1,500D / 2,140F (single denier 0.7d, strength: 20 g / d) of wholly aromatic polyamide (Poly-P-Phenylene-terephthalamide) were measured in the same manner as in Example 1.

Comparative Example 1

The filament fiber 840 denier of nylon 6 is woven into a matt tissue fabric having a density of 36 × 36 bones / inch, cut into arbitrary sizes, and made into 16 plies so that the total weight is 968 g. Measure the elasticity.

Comparative Example 2

Weaving nylon 6 filament fiber 840 denier into a fabric of Matt tissue having a density of 36 × 36 bones / inch, and 1,500 denier aramid filament fibers having a density of 17 × 17 bones / inch Weaving into a woven fabric, immersed in an epoxy resin solution containing an organic solvent to make the resin content of the woven fabric 20-25wt%, and after heat treatment, ply the nylon fabric into 12 ply and ply the aramid fabric into 4 ply ) Were laminated to each other and heated and pressed at high temperature.

Cut it to any size so that the total weight is 1,210 g to measure the ballistic resistance.

TABLE 1

Claims (1)

Single yarn denier 0.7-1.5, filament number 1,000-2,200, totally aromatic polyamide filament yarn having a strength of 20g / d or more is twisted to 8-10T / cm, weaved it to 30-35 bone / inch with a light warp yarn, and then produced by water repellent treatment A method for producing flexible body armor having excellent flexibility, characterized in that the forge has a ballistic resistance more than 1,500 feet / second, water repellency 80%.