Laminated ballistic structure comprising alternating undirectional and thermoplastic layers
OwnerJohannes Maria Bergmans, Ernst M. Winkler +2inventors
InventorsJohannes Maria Bergmans, Ernst M. Winkler, Kurt R. Stolze, Carsten K. Rose
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Abstract
The invention pertains to a laminated ballistic structure having an array of layers of substantially alternating n unidirectional (UD) layers of ballistic fiber and m thermoplastic layers, excluding thermoplastic layers at the outer sides of the structure, wherein ½n≦m<n. The UD layers have 1-25 wt. % of an elastomeric material based on a dry fiber weight. Preferably, the UD layers have aramid, PBO, PBI, and/or high density polyethylene fibers and the material of the thermoplastic layers is polyethylene or polypropylene.
Claims10
A laminated ballistic structure comprising an array of layers of substantially alternating n unidirectional (UD) layers of ballistic fiber and m thermoplastic layers, excluding thermoplastic layers at the outer sides of the structure, wherein ½n≦m<n and the UD layers comprise 1-25 wt. % of an elastomeric material based on the dry fiber weight.
The laminated ballistic structure of any one of claims 14 wherein the UD layers comprise fibers with an energy-to-break>8 J/g, a tensile modulus>150 g/dtex, and a tenacity>7 g/dtex.
Dependencies are inferred from the claim text.