# US 11,028,510 B2 · System for manufacture of bulletproof components, sheets, and garments with high modulus strong fibers held in a polyamide matrix

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- Number: US 11,028,510 B2
- Document ID: US11028510B2
- Status: Granted
- Kind: B2
- Application number: 16/690,346
- Filed: 2019-11-21
- Published: 2020-08-13
- Granted: 2021-06-08
- Earliest claimed: 2018-12-28
- Applicants: Michael A. Pero, III
- Inventors: Michael A. Pero, III
- Web page: https://patentgrep.com/patent/US11028510B2

## CPC

- D04H 1/559: the fibres being within layered webs
- B32B 5/022: {Non-woven fabric}
- B32B 5/12: characterised by the relative arrangement of fibres or filaments of {different layers, e.g. the fibres or filaments being parallel or perpendicular to each other}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- F41H 5/0485: {all the layers being only fibre- or fabric-reinforced layers}
- B32B 2260/023: Two or more layers
- B32B 2260/046: Synthetic resin
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0261: Polyamide fibres
- B32B 2262/0269: Aromatic polyamide fibres
- B32B 2262/101: Glass fibres
- B32B 2264/0264: Polyamide particles
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/558: Impact strength, toughness
- B32B 2571/02: defensive, e.g. armour plates or anti-ballistic clothing
- D10B 2331/02: polyamides (D10B2331/08 takes precedence)
- D10B 2501/04: Outerwear; Protective garments
- D10B 2507/00: Sport; Military
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A bulletproof garment fabric comprises parallel high strength fibers that are placed in layers. The layers are arranged in multiple orientations to resist bullet penetration stress and bonded to each other by precipitated ultrafine particles of nylon. The bonded high strength fibers resist the penetration load of a bullet and are thereby operative to prevent penetration of the bullet through the garment fabric. A porous nylon sheet is injection molded, and combined with strong fibrous materials having high modulus to form a layered sandwich that imparts strength and anti-ballistic properties to jackets, components and armor for vehicles and aircraft used in military applications.

## Claims

### Claim 1

A method for manufacturing a nylon bulletproof fabric for stitching a bulletproof garment, comprising the steps of:
a) preparing an adhesive by heating glycol to a temperature of 180° C. and adding thereto melt-spun nylon fibers or washed nylon fibers harvested from recycled nylon carpet materials, the nylon fibers being chopped to lengths of 1 to 5 inches;
b) adding chopped nylon fibers to said heated glycol and dissolving all the nylon fibers to form a gel;
c) cooling the glycol with dissolved nylon fibers to 150° C. to precipitate ultrafine nylon particles;
d) placing a plurality of parallel high strength fibers in layers, each layer being inclined at an angle with respect to a previous layer so that the fibers carry a bullet penetration load in several directions to prevent the entry of a bullet through the fabric;
e) passing cooled glycol at 150° C. with precipitated nylon particles through the fiber assembly so that the external surface of the fibers is coated with ultrafine nylon precipitated particles;
f) heating said adhesive coated assembled fiber assembly to a temperature at 180° C. for sufficient time to bond the nylon fibers;
whereby the bonded fibers form a bulletproof nylon sheet that resists bullet penetration forces in all directions and prevents entry of said bullet through the fabric.

### Claim 2 (depends on 1)

The method for manufacturing a nylon bulletproof fabric as recited by claim 1, wherein said high strength fiber is polyamide fiber, polyethylene and polyolefin fibers or glass fibers.

### Claim 3 (depends on 1)

The method for manufacturing a nylon bulletproof fabric as recited by claim 1, wherein said adhesive is a gel formed by dissolving nylon in glycol at 180° C.

### Claim 4 (depends on 1)

The method for manufacturing a nylon bulletproof fabric as recited by claim 1, wherein said bulletproof nylon sheet is shaped to form a jacket that resists bullet penetration forces.