Patent ID: 7923094
Filing Date: 2011-04-12
Classification: B29C,B29K,B32B,F41H,Y10T

Abstract:
1. A ballistic-resistant panel comprising a plurality of bonded, interleaved and angularly disposed layers of non-fibrous ultra high molecular weight polyethylene tape, said layers bonded together through the application of heat of at least 150 degrees F. and pressure of at least 150 psi; each of said layers of non-fibrous ultra high molecular weight polyethylene tape comprising a plurality of tape strips of indeterminate length having a modulus of greater than 1,400 grams per denier and longitudinally joined together in a sheet structure; said sheet structure includes partially overlapped or abutted strips of non-fibrous, ultra high molecular weight polyethylene tape that are bonded with heat and pressure to define joints between adjoining strips wherein said joints include a higher strength and higher modulus than the portions of the sheet outside the joints; and said plurality of tape strips joined together by calendering an array of said overlapped or abutted strips at a temperature between 120° C. and 155° C. and at a pressure of at least 300 pounds per lineal inch (pli) and under a tension of between 0.3 grams/denier and 5 grams/denier.