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US 2022/0090881 A1Published application
Ballistic-resistant article based on films provided with matrix
AssigneeTeijin Aramid B.V.
InventorsRuben CALIS, Dennis WILBERS
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AssigneeTeijin Aramid B.V.
InventorsRuben CALIS, Dennis WILBERS
Estimating the term…
A process for manufacturing a ballistic resistant article including steps: a) stacking a stretchable lamina of ultra-high molecular weight polyethylene (UHMWPE) and a stretchable continuous film of a polymer as organic matrix material to form a lamina-film stack, the continuous film not being an UHMWPE film; b) elongating the stack at a temperature below the melting point of the lamina, to an elongation ratio of at least 2, thereby providing a UHMWPE film with an organic matrix material in which the UHMWPE film is co-stretched with the film of polymer as organic matrix material; c) aligning a plurality of films to form a layer of films; d) stacking at least two layers of films to form a sheet; e) stacking a plurality of sheets to form a stack of sheets, and consolidating the sheets prior to and/or after step e) by applying pressure and optionally heat. Also, a ballistic-resistant article.
A process for the manufacture of a ballistic resistant article comprising the steps of
A ballistic-resistant article comprising a stack of sheets, the sheets comprising at least two layers of ultra-high molecular weight polyethylene (UHMWPE) films provided with an organic matrix material, wherein the UHMWPE films are provided over at least 95% of at least one of their surfaces with a continuous film of a polymer as organic matrix material, the continuous film of a polymer as organic matrix material not being an UHMWPE film, wherein the UHMWPE films have a thickness of 10-100 microns and the organic matrix polymer film has a thickness of 0.1-3 microns, wherein the weight percentage of the organic matrix polymer with respect to the total weight of organic matrix polymer and ultra-high molecular weight polyethylene is from 0.1 to 3 wt. %, and wherein the sheets in the stack are consolidated, wherein the orientation of the polymer molecules in the continuous film of a polymer as organic matrix material in a first direction of the film differs from the orientation of the polymer molecules in the continuous film of a polymer in a second direction of the film, wherein the first direction of the film and the second direction of the film are at an angle of 90° C.
Dependencies are inferred from the claim text.