| 主权项 |
1. A non-rigid composite sheet comprising in order
(i) a first component having an are weight of from 88 to 678 gsm comprising a first fabric of continuous filament yarns, the yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the second fabric being a woven fabric and adjacent to the first fabric of the first component, and (iii) a third component comprising a second polymeric layer, wherein
(a) the first fabric is a woven fabric having an area weight of from 70 to 508 gsm comprising yarns of aromatic polyamide, aromatic copolyamide, glass fiber or carbon fiber,(b) the polymer of the first and second polymeric layers is polyurethane, polyethylene, polypropylene, polyethylenenaphthalate, polyacrylonitrile, fluoropolymer, polyimide, polyketone, polyimide, polysulfone, polyarlene sulfide, liquid crystal polymer, polycarbonate or an ionomer, and(c) when the second fabric is free of a polymeric coating, the fabric has a flame barrier cover of at least 90% when measured over a minimum area of 645 sq. mm. of fabric surface, an area weight of at least 136 gsm and the fabric comprises fiber having a nominal filament tensile strength of at least 3.4 GPa, or when the second fabric further comprises a polymeric coating on the surface of, or impregnated into the fabric, the coated fabric has a flame barrier cover of at least 90% when measured over a minimum area of 645 sq. mm. of fabric surface, an area weight of at least 30 gsm and the fabric comprises fiber having a having a nominal filament tensile strength of at least 3.4 GPa and the polymeric coating is present in an amount of from 20 to 50 weight percent of the fabric weight with the proviso that, when the fabric prior to coating has a flame barrier cover of less than 90% and/or the fabric weight prior to coating is less than 135 gsm, then the coating weight is at least 50 gsm. |
