System for preparing glass fiber pellets

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 37/16 (2006.01) C03B 37/14 (2006.01) C03B 37/15 (2006.01) C03C 1/02 (2006.01) C03C 25/00 (2006.01) C03C 25/14 (2006.01)

Patent

CA 2256630

A system for making densified glass fiber pellets from chopped segments of multi-filament glass strand is described. The densifiedpellets may be advantageously produced by hydrating chopped glass strands (24) and then pelletizing them by tumbling in a rotary drum (41), and densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube (42) for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.

L'invention concerne un système de fabrication d'agglomérés en fibre de verre, formés à partir de segments coupés dans des fils de verre à plusieurs filaments. Pour un meilleur résultat, ces agglomérés peuvent être produits par hydratation desdits fils de verre coupés (24), puis par agglomération de ces fils, que l'ont fait tourner dans un tambour rotatif (41), avant de densifier lesdits agglomérés ainsi obtenus en les faisant tourner dans un tube rotatif ondulant ou en zigzag (42), pendant un intervalle de temps suffisant pour augmenter leur densité mais insuffisant pour détériorer les fibres, ce qui rendrait les articles composites formés à partir desdits agglomérés moins résistants à la traction ou à l'impact par rapport à des articles composites comparables, formés à partir de segments de fil non soumis à une agglomération.

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