Method of making improved ballistic products

  • US 8,673,198 B2
  • Filed: 02/18/2006
  • Issued: 03/18/2014
  • Est. Priority Date: 02/18/2006
  • Status: Active Grant
First Claim
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1. A method of making a ballistic resistant composite panel having improved resistance to high energy rifle bullets that have an energy level of at least about 1500 joules, said method comprising:

  • providing at least one fibrous layer comprising a network of high tenacity aramid fibers;

    coating the fibrous layer with a thermoplastic polyurethane resin, said polyurethane resin comprising a copolymer mix of polyurethane resins in water, said copolymer mix comprising more than one polyurethane copolymer resin; and

    molding the fibrous layer at a pressure of at least about 1,500 psi (10.3 MPa) to thereby form said ballistic resistant composite panel, whereby said ballistic resistant composite panel has a ballistic resistance and strength greater than that of a panel formed from the same composition of said aramid fibers and said copolymer mix of polyurethane resins but that is molded under a pressure of 500 psi, and wherein said ballistic resistance is measured against rifle bullets that have an energy level of at least about 1500 joules.

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