RAPID FABRIC FORMING FOR PENETRATION RESISTANT FABRIC

摘要

A flexible penetration resistant stabilized composite, comprising: an interlaced yarn structure of yarns having a tenacity of at least 8 g/d, a tensile modulus of at least 150 g/d and an energy to break of at least 10 j/g, the yarn structure further comprising: a plurality of first yarn subgroups (30, 32, 44, 46, 52, 54, 60, 62) having a plurality of yarns oriented in a first angular direction free of crossings, the first yarn subgroups forming a stack with a plurality of second yarn subgroups (36, 38, 48, 50, 56, 58, 64, 66) having a plurality of yarns oriented in a second angular direction free of crossings; the yarns in each subgroup following substantially parallel paths that are spaced apart in a repeating pattern to sparsely cover a common predetermined area; the yarn subgroups are alternately stacked with a first subgroup next to a second subgroup, wherein the yarns in the first subgroup cross the yarns in the second subgroup. A first polymeric web may be bound to a first surface of the stack, a second to a second surface. The yarns of the top subgroup can be connected to the bottom subgroup by ultrasonic welding (68, 70, 72, 74).