Coated, long fiber reinforcing composite structure and...

B - Operations – Transporting – 29 – C

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B29C 47/00 (2006.01) B29B 15/12 (2006.01) B29C 47/02 (2006.01) B29C 47/06 (2006.01) B29C 47/10 (2006.01) B29C 70/52 (2006.01) C08L 1/14 (2006.01)

Patent

CA 2300384

A process for the continuous preparation of a coated, long fiber reinforcing composite structure suitable for the preparation of shaped articles. The process is characterized by impregnating a plurality of continuous lengths of reinforcing fiber strands with a first thermoplastic resin material while continuously drawing the fiber strands to produce a long fiber reinforcing composite structure followed by coating a second thermoplastic resin material containing additives onto the long fiber reinforcing composite structure to produce a coated, long fiber reinforcing composite structure. The coating additives may be selected from mineral reinforcing agents, lubricants, flame retardants, blowing agents, foaming agents, ultraviolet light resistant agents, heat sensitive pigments, etc. The coated, long fiber reinforcing composite structure prepared according to the process is suitable for the preparation of shaped articles exhibiting good physical and chemical properties.

L'invention concerne un procédé pour la préparation d'une structure composite enduite de renfort à longues fibres convenant à la préparation d'articles formés. Ce procédé consiste à imprégner une pluralité de longueurs continues de fils de fibres de renfort d'une première résine thermoplastique, à tirer simultanément les fils de fibres pour produire une structure composite de renfort à longues fibres, puis à enduire la structure composite d'une seconde résine thermoplastique contenant des additifs et en faire une structure composite enduite de renfort à longues fibres. Les additifs d'enduction peuvent être sélectionnés parmi les agents de renfort minéral, les lubrifiants, les agents ignifuges, les agents d'expansion, les agents moussants, les agents résistant aux rayons ultraviolets, les pigments thermosensibles, etc. Ladite structure convient à la préparation d'articles formés arborant des propriétés physiques et chimiques de qualité.

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