The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2013
Filed:
Dec. 21, 2007
Martin Antonius M. A. ES Van, Brunssum, NL;
Marcel M. Jongedijk, Sittard, NL;
Roelof R. Marissen, Koningstraat, NL;
Hen H. Hoefnagels, Ravensboschstraat, NL;
Martin Antonius M. A. Es Van, Brunssum, NL;
Marcel M. Jongedijk, Sittard, NL;
Roelof R. Marissen, Koningstraat, NL;
Hen H. Hoefnagels, Ravensboschstraat, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
Ballistic resistant sheets and molded articles formed thereof are disclosed, wherein a ballistic resistant sheet includes a stack of at least 4 monolayers, each monolayer containing unidirectionally oriented reinforcing fibers with a tensile strength of between 3.5 and 4.5 GPa, and at most 20 mass % of a matrix material, the areal density of a monolayer is at least 25 g/mand with the fiber direction in each monolayer being rotated with respect to the fiber direction in an adjacent monolayer. When a plurality of the ballistic resistant sheets are formed into a pile and subjected to curved molding conditions, a homogenous curved ballistic resistant molded article is formed without irregular folding of the ballistic resistant sheets in the pile.