Fabric for protective garments
View Patent ↗The present invention relates to a heat, flame, and electric arc resistant fabric ( 1 ) for use as single or outer layer of protective garments. The fabric ( 1 ) of the invention comprises at least two separate single plies which are assembled together at predefined positions so as to build pockets ( 4 ). The fabric ( 1 ) of the invention is made of materials independently chosen from the group consisting of aramid fibers and filaments, polybenzimidazol fibers and filaments, polyamidimid fibers and filaments, poly(paraphephenylene benzobisaxazole) fibers and filaments, phenol-formaldehyde fibers and filaments, melamine fibers and filaments, natural fibers and filaments, synthetic fibers and filaments, artificial fibers and filaments, glass fibers and filaments, carbon fibers and filaments, metal fibers and filaments, and composites thereof. Due to its peculiar structure, the fabric ( 1 ) according to the present invention can have a specific weight which is considerably lower than that of known fabrics having comparable mechanical and thermal properties.
1. Heat, flame, and electric arc resistant fabric ( 1 ) for use as single or outer layer of protective garments, characterized in that it comprises at least two different warp yarns and at least two different weft yarns woven together at predefined positions so as to build closed, adjacent, and square shaped pockets having upper and lower fabric surfaces having different dimensional thermal shrinkages;
the warp and weft yarns consisting of monofilament yarns, multifilament yarns, spun yarns or core spun yarns based on materials independently chosen from the group consisting of aramid fibers and filaments, polybenzimidazole fibers and filaments, polyamide-imide fibers and filaments, poly(paraphenylene benzobisoxazole) fibers and filaments, phenol-formaldehyde fibers and filaments, melamine fibers and filaments, natural fibers and filaments, glass fibers and filaments, carbon fibers and filaments, metal fibers and filaments, and composites thereof; and
wherein the at least two different warp yarns and the at least two different weft yarns are woven together by alternating them so as to obtain a chess board design such that two adjacent pockets have different upper or lower fabric surfaces.
2. The fabric ( 1 ) according to claim 1 wherein the warp and weft yams are, independently chosen from the group consisting of single yarns, twisted yams and hybrid yarns.
3. The fabric ( 1 ) according to claim 1 , wherein the pocket size is between 5 and 50 mm.
4. The fabric ( 1 ) according to claim 3 , wherein the pocket size is between 8and 32 mm.
5. The fabric ( 1 ) according to claim 1 , having a specific weight between 100 g/m 2 and 900 g/m 2 .
6. The fabric ( 1 ) according to claim 5 , having a specific weight between 170 and 320 g/m 2 .
7. Garment for protection against heat, flames and electric arc comprising a structure made of at least one layer of a fabric ( 1 ) according to claim 1 .
8. The garment according to claim 7 , comprising an internal layer.
9. The fabric according to claim 1 , comprising at least two different aramid yarns.