Transparent composite having a laminated structure
AssigneeSaint-Gobain Ceramics & Plastics, Inc.
InventorsDrew T. HAVEN, Charles WOODDELL, David J. WEEDEN
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Abstract
Novel transparent composites have been developed that have relatively lower areal densities of conventional transparent composites, where the composites are tested for the same threat levels as specified in the NIT or STANAG standards. Particular transparent composites can withstand projectiles having relatively high kinetic energy, for example, using STANAG 4 testing conditions. Further, the novel transparent composites can withstand multiple hits using Multiple Hit Testing at a STANAG 2 threat level.
Claims20
A transparent composite comprising:
- a first inorganic layer;
- a second inorganic layer;
- and
- a first polymer layer having a thickness of at least 3.5 mm,
- wherein:
- a strike face of the transparent composite is closest to the first layer as compared to each of the second and third layers;
- and
- the second inorganic layer is disposed between the first inorganic layer and the first polymer layers.
A transparent composite configured to prevent penetration of a projectile having a kinetic energy of at least 4000 J, wherein the transparent composite has an areal density such that:
- ρA≤(Ep/250)+50, where
- ρA is the areal density in units of kg/m2;
- and
- Ep is the kinetic energy of the projectile in units of J.
A transparent composite configured to prevent penetration a projectile using STANAG 4 KE Threat test conditions, wherein the transparent composite has an areal density of at most 200 kg/m2.
Dependencies are inferred from the claim text.