Ballistic-resistant curved molded article
AssigneeAvient Protective Materials B.V.
InventorsJohann Van Elburg, Matthew Craig, James Rogers
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Abstract
The present invention provides a process for producing a ballistic-resistant curved molded article said process comprising pressing in a mold a stack comprising a plurality of layers of unidirectionally aligned polyolefin fibers substantially absent a bonding matrix and a plurality of layers of adhesive; characterized in that a means for dispersing pressure is employed against at least one surface of the stack. Also provided are a ballistic-resistant curved molded article and a press-pad having substantially the shape of a curved mold.
Claims14
A process for producing a ballistic-resistant curved molded article, said process comprising the steps of:
- (a) providing a mold defining a curved pressing surface;
- (b) pressing in the mold a stack comprising:
- a plurality of layers of unidirectionally aligned polyolefin fibers substantially absent a bonding matrix;
- and
- a plurality of layers of adhesive disposed between adjacent layers of the unidirectionally aligned fibers, and
- (c) positioning a pressure dispersing medium capable of assuming a curved shape corresponding to the curved pressing surface of the mold between the curved pressing surface of the mold and at least one surface of the stack, and
- (d) applying pressure to the at least one surface of the stack and, during application of the pressure, employing the pressure dispersing medium positioned between the at least one surface of the stack and the curved pressing surface of the mold to disperse applied pressure against the at least one surface of the stack and thereby form the ballistic-resistant curved molded article.
A ballistic-resistant curved molded article which comprises:
- a plurality of layers of unidirectionally aligned polyolefin fibers, wherein the layers are substantially absent of a bonding matrix;
- and
- a plurality of layers of adhesive disposed between adjacent layers of the unidirectionally aligned fibers, wherein
- the ballistic-resistant curved molded article has an areal density of at most 11 Kgm−2 and meets NIJ level III+performance against 7.62×39 mm MSC (AK47).
Dependencies are inferred from the claim text.