Laminated ballistic structure comprising alternating...

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

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F41H 5/04 (2006.01) B32B 5/28 (2006.01) B32B 27/12 (2006.01)

Patent

CA 2450338

The invention pertains to a laminated ballistic structure comprising an array of layers of substantially alternating n unidirectional (UD) layers of ballistic fiber and m thermoplastic layers, excluding thermoplastic layers at the outer sides of the structure, wherein 1/2n<=<n and the UD layers comprise 1-25 wt. % of an elastomeric material based on the dry fiber weight. Preferably, the UD layers comprise aramid, PBO, PBI, and/or high density polyethylene fibers and the thermoplastic material is polyethylene or polypropylene.

L'invention concerne une structure balistique laminée. Cette structure comprend un réseau de couches unidirectionnelles (UD) (n) en fibres balistiques et de couches thermoplastiques (m) pratiquement alternantes et elle exclut les couches thermoplastiques au niveau de ses côtés externes, 1/2n<=<n et les couches UD renfermant entre 1 et 25 pour-cent en poids d'une matière élastomère en fonction du poids de fibres sèches. De préférence, les couches UD contiennent de l'aramide, du poly-p-phénylènebenzobisoxazole (PBO), du poly-p-phénylènebenzobisimidazole (PBI) et/ou des fibres en polyéthylène à haute densité, et la matière thermoplastique est un polyéthylène ou un polypropylène.

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