Method of making improved ballistic products

Details Method of making improved ballistic products Method of making improved ballistic products

B - Operations, Transporting

32

B

B32B 5/28 (2006.01) B32B 27/04 (2006.01) B32B 27/40 (2006.01) C08J 5/04 (2006.01) C08J 5/24 (2006.01) F41H 5/04 (2006.01)

Patent

CA 2642509

A method of making a ballistic resistant composite material having improved resistance to high energy rifle bullets and the like. The method comprises providing at least one fibrous layer comprising a network of high tenacity aramid fibers. The fibrous layer is coated with a thermoplastic polyurethane resin. The coated fibrous layer is molded at a pressure of at least about 1,500 psi (10.3 MPa). Preferably, a plurality of fibrous layers are employed, each of which is formed from unidirectionally oriented aramid fibers in a thermoplastic polyurethane resin matrix. Adjacent fibrous layers are preferably oriented at 90° with respect to each other.

La présente invention concerne un procédé de production d'un matériau composite de protection balistique présentant une résistance améliorée contre les balles de fusil à haute énergie et autres. Le procédé consiste à utiliser au moins une couche fibreuse comprenant un réseau de fibres aramide à haute ténacité. La couche fibreuse est recouverte d'une résine de polyuréthane thermoplastique. La couche fibreuse recouverte est moulée à une pression d'au moins environ 1,500 psi (10.3 MPa). On utilise, de préférence, une pluralité de couches fibreuses qui sont chacune formées à partir de fibres aramide orientées de manière unidirectionnelle dans la matrice de résine polyuréthane thermoplastique. Des couches fibreuses adjacentes sont de préférence orientées à 90° les unes par rapport aux autres..

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