Multilayered polyethylene material and ballistic resistant articles manufactured therefrom
AssigneeDsm IP Assets B.V.
InventorsShalom Geva, Yuval Fuchs
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Abstract
The present invention relates to polyethylene material that has a plurality of unidirectionally oriented polyethylene monolayers cross-plied and compressed at an angle to one another, each polyethylene monolayer composed of ultra high molecular weight polyethylene and essentially devoid of resins. The present invention further relates to ballistic resistant articles that include or incorporate the inventive polyethylene material and to methods of preparing the material and articles incorporating same.
Claims24
A ballistic resistant article comprising (a) a plurality of unidirectional monolayers, said monolayers comprising polyethylene with the direction of each unidirectional monolayer being positioned at an angle with respect to the direction of an adjacent unidirectional monolayer, and wherein the polyethylene in each of the unidirectional monolayers is in the form of unidirectionally drawn film strips, wherein each strip in each monolayer is partially overlapped and aligned in the same direction in one plane with adjacent film strips in the monolayer, wherein the partially overlapped adjacent film strips in each monolayer are compression-laminated to one another, and wherein the film strips are elongated bodies having a length, a width and thickness with the length and width being substantially larger than the thickness, and (b) layers of ballistic fiber.
Dependencies are inferred from the claim text.