High tenacity, high filament multi-filament yarn preparation process, multiple filament polyethylene yarn, composite material panel and ballistically resistant composite material panel

摘要

"HIGH TENACITY Yarn PREPARATION PROCESS OF HIGH MODULE FILAMENTS, MULTIPLE FILAMENT POLYETHYLENE YARN, COMPOSITE MATERIAL PANEL AND BALYSTIC RESISTANCE COMPOUND PANEL". Polyethylene solutions are extruded through a multi-hole spinner into a transverse gas flow stream to form a fluid product. The fluid product is drawn at a temperature which allows gel to form at a draw ratio of at least 5: 1 over a length of less than about 25 mm with the velocity of the transverse gas stream less. than about 3 m / min. The fluid product is cooled in an immiscible liquid extinction bath to form a gel. The gel is stretched. The solvent is removed from the gel to form a dry gel and the dry gel produced is stretched in at least two stages to produce a polyethylene yarn characterized by a toughness of at least 35 g / d, a modulus of at least 35 g / d. at least 1600 g / l of work required to disrupt at least 65 J / g. The wire is further characterized in that it has more than about 60% of a high tension orthorhombic crystalline component and optionally a monoclinic crystalline component in more than about 2% of the total crystalline content. Composite material panels made of this wire exhibit excellent ballistic properties, for example, 300 Jm ^ 2 ^ / kg or more if tested under test procedures using .38 caliber bullets. NILECJ-STD-0101.01 . A panel of ballistically resistant composite material is provided, comprising a multi-filament polyethylene yarn having a toughness of at least about 35 g / d, a modulus of at least 1600 g / d, a job required to perform breakage of at least 65 J / g, in which the wire has more than 60% of a high tension orthorhombic crystalline component and the wire has a monoclinic crystalline component of more than about 2% of the total crystalline content.