Multilayered material sheet and process for its preparation

F - Mech Eng,Light,Heat,Weapons – 41 – H

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F41H 5/04 (2006.01)

Patent

CA 2650440

The invention relates to a multilayered material sheet comprising a consolidated stack of unidirectional monolayers of drawn polymer, whereby the draw direction of two subsequent monolayers in the stack differs. At least one monolayer comprises a plurality of unidirectional tapes of the drawn polymer, aligned in the same direction, whereby adjacent tapes do not overlap. The invention also relates to a process for the preparation of the multilayered material sheet, and to a ballistic resistant article comprising the multilayered material sheet.

L'invention concerne une feuille de matière multicouche comprenant un empilement renforcé de monocouches unidirectionnelles de polymère étiré, le sens d'étirage de deux monocouches consécutives de l'empilement différant. Au moins une monocouche comprend une pluralité de bandes unidirectionnelles de polymère étiré, alignées dans le même sens, les bandes adjacentes ne se chevauchant pas. L'invention concerne également un procédé de préparation de la feuille de matière multicouche et un article à résistance balistique comprenant la feuille de matière multicouche.

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