Fabric for protective garments
View Patent ↗This invention relates to heat and flame resistant single ply fabric for use as a single or outer layer of a protective garment for a wearer. The fabric comprises at least one warp system and at least two weft systems. The warp system comprises a blend of 60 to 90 wt-% poly-m-phenylenisophtalamid (meta-aramid) and 10 to 40 wt-% poly-p-phenylenterephtalamid (para-aramid). The first of the at least two weft systems comprises a blend of 85 to 95 wt-% meta-aramid and 5 to 15 wt-% para-aramid. The second of the at least two weft systems essentially comprises para-aramid.
1. Heat and flame resistant single ply fabric for use as single layer of a protective garment for a wearer, characterized in that the fabric comprises interwoven warp and weft yarns wherein each of the warp yarns comprises a blend of 60 to 90 wt-% poly-m-phenylenisophtalamid (meta-aramid) and 10 to 40 wt-% poly-p-phenylenterephtalamid (para-aramid), and the weft yarns comprise at least two weft yarns, the first of the at least two weft yarns comprising a blend of 85 to 95 wt-% meta-aramid and 5 to 15 wt-% para-aramid, the second of the at least two weft yarns essentially comprising para-aramid, and characterized in that the fabric is woven in such a way that from about 55 wt-% to about 80 wt-% of the warp yarns appear on the fabric side facing the wearer, from about 55 wt-% to about 80 wt-% of the first of the at least two weft yarns appears on the fabric side facing away the wearer and from about 70 wt-% to about 90 wt-% of the second of the at least two weft yarns appears on the fabric side facing the wearer.
2. The fabric according to claim 1 , wherein the ratio between the first and the second of the at least two weft yarns is chosen in such a way that the total wt-% ratio between meta-aramid and para-aramid in the at least two weft yarns is substantially the same as the wt-% ratio between meta-aramid and para-aramid in the warp yarns.
3. The fabric according to claim 1 , wherein the warp and weft yarns are, independently to each other, based on filaments, single yarns and twisted yarns.
4. The fabric according to claim 1 , wherein the first of the at least two weft yarns comprise fibers having a linear mass from about 1.1 to about 1.4 dtex, the second of the at least two weft yarns comprise fibers having have a linear mass from about 1.7 to about 2.4 dtex, and the warp yarns comprise fibers having a linear mass from about 1.7 to about 2.2 dtex.
5. The fabric according to claim 1 , wherein the first of the at least two weft yarns and the warp yarns comprise each up to 4 wt-% of antistatic fibers.
6. The fabric according to claim 1 , wherein the warp and weft yarns are twisted yarns.
7. The fabric according to claim 1 , having a specific weight from about 170 to about 250 g/m 2 .
8. The fabric according to claim 1 , having two weft yarns.
9. Garment for protection against heat and flames comprising a structure made of at least one layer of a fabric according to claim 1 .
10. The garment according to claim 9 , comprising an internal layer, optionally an intermediate layer made of a breathing waterproof material, and an outer layer where the outer layer is the at least one layer made of the fabric.