Vacuum panels used to dampen shock waves in body armor

摘要

Ballistic resistant composite articles having improved resistance to backface deformation. The composite articles incorporate one or more vacuum panels that mitigate or eliminate shock wave energy resulting from a projectile impact to minimize transient compression of materials behind the armor.

主权项

1. A ballistic resistant article comprising:
a) a vacuum panel having first and second surfaces, said vacuum panel comprising an enclosure and an interior volume defined by the enclosure, wherein at least a portion of said interior volume is unoccupied space and wherein said interior volume is under vacuum pressure; and b) at least one ballistic resistant substrate directly coupled with at least one of said first and second surfaces of said vacuum panel, said substrate comprising fibers and/or tapes having a tenacity of about 7 g/denier or more and a tensile modulus of about 150 g/denier or more, or wherein said substrate comprises a rigid, non-fiber based, non-tape based material.