Fibre reinforced composites and method of making same

Details Fibre reinforced composites and method of making same Fibre reinforced composites and method of making same

B - Operations, Transporting

29

C

B29C 70/52 (2006.01)

Patent

CA 2362235

A method is disclosed for producing a fibre reinforced composite by pultrusion having variable strength characteristics along its length including the steps of drawing through a pultrusion die (38) a series of reinforcing fibres (32) to form a pultruded fibre composite product. The method is characterided by incorporating in the reinforcing fibres (14) prior to the pultrusion step additional fibres (20) to form modified fibres (32) having a characteristic such as tenacity or modulus different from that of the first said reinforcing fibres (14) in order to wary the strength characteristics of the final composite (42) substantially without altering the cross-sectional area thereof. A curable or settable plastics material (40) is applied around the fibres during the pultrusion step and which is cured, part-cured or allowed to set to form the finished composite (42).

L'invention porte sur un procédé de fabrication par pultrusion d'un composite renforcé de fibres présentant une résistance variable sur sa longueur. Ledit procédé consiste à étirer dans une filière de pultrusion (38) une série de fibres de renfort (32) de manière à obtenir un produit composite de fibres pultrudées. Le procédé se caractérise par l'incorporation aux fibres (14) de renfort et avant la pultrusion, de fibres (20) additionnelles, de manière à former des fibres d'une ténacité et d'un module différents de ceux des premières fibres (14) de renfort, ce qui permet de faire varier la résistance du composite final (42) sans pratiquement en modifier la section transversale. On applique autour des fibres pendant la pultrusion un matériau plastique durcissable durci, partiellement durci, ou prêt au durcissement pour obtenir le composite (42) fini.

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