Flexible ballistic composites resistant to liquid pick-up,...

B - Operations – Transporting – 32 – B

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B32B 5/28 (2006.01) B32B 27/40 (2006.01) F41H 5/04 (2006.01)

Patent

CA 2620324

Flexible ballistic resistant composite material that has improved resistance to pick-up of water and other liquids, the composite material comprising a plurality of non-woven fibrous layers. The fibrous layers are formed from a network of high tenacity fibers (aramid fibers, extended chain polyethylene fibers and/or rigid rod fibers). The fibers are embedded in a matrix of a thermoplastic polyurethane resin. Preferably, at least two adjacent fiber layers are oriented in a cross-ply arrangement with respect to each other. Flexible armor, such as body vests, are provided which are formed at least in part from the flexible composite material.

L'invention concerne un matériau composite balistique, flexible et résistant présentant une résistance améliorée à la prise d'eau et d'autres liquides, ledit matériau composite comprenant une pluralité de couches fibreuses non tissées. Les couches fibreuses sont formées à partir d'un réseau de fibres de haute ténacité (fibres d'aramide, fibres de polyéthylène à chaîne étendue et/ou fibres en bâtonnets rigides). Les fibres sont incorporées dans une matrice d'une résine de polyuréthanne thermoplastique. De préférence, au moins deux couches de fibres adjacentes sont orientées avec une disposition en nappe croisée l'une part rapport à l'autre. L'invention concerne également une armure flexible, telle qu'un gilet corporel, formée au moins en partie du matériau composite flexible.

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