Transversely and axially reinforced pultrusion product

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 69/00 (2006.01) B29B 9/14 (2006.01) B29B 15/10 (2006.01) B29C 70/08 (2006.01) B29C 70/52 (2006.01)

Patent

CA 2270924

A reinforced pultrusion product (30') comprises a polymeric matrix (36), at least one longitudinally oriented buckled reinforcement fiber (44) embedded in said polymeric matrix (36), and at least one longitudinally oriented linear reinforcement fiber (46) embedded in said polymeric matrix (36). The product (30') is formed through a pultrusion process wherein a set of composite strands (24) comprising reinforcement fibers and polymeric fibers are provided. A supplemental tension force is applied to a first subset of the composite strands (26). The composite strands are heated such that the polymeric fibers of a second subset of composite strands (28) shrink to cause the reinforcement fibers in each of the second subset of composite strands (28) to buckle. The heated set of composite strands (24), including the buckled reinforcement fibers (44), are consolidated in a pultrusion die (18).

Cette invention concerne un produit de pultrusion renforcé (30') comprenant une matrice polymère (36), au moins une fibre de renfort bouclée et orientée longitudinalement (44) qui est noyée dans la matrice polymère (36), et au moins une fibre de renfort linéaire et orientée longitudinalement (46) qui est également noyée dans ladite matrice polymère (36). Le produit (30') est fabriqué selon un procédé de pultrusion où l'on fait appel à un ensemble de brins composites (24) comprenant des fibres de renfort et des fibres polymères. Une force de tension supplémentaire est appliquée à un premier sous-ensemble de ces brins composites (26). Les brins composites sont chauffés de manière à ce que les fibres polymères d'un second sous-ensemble de brins composites (28) rétrécissent, et à ce que les fibres de renfort dans chaque second sous-ensemble de brins composites (28) se mettent en boucle. L'ensemble chauffé de brins composites (24) comprenant les fibres de renfort bouclées (44) est ensuite consolidé dans une filière de pultrusion (18).

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