System for preparing polymer encapsulated glass fiber pellets

Details System for preparing polymer encapsulated glass fiber pellets System for preparing polymer encapsulated glass fiber pellets

C - Chemistry, Metallurgy

03

B

C03B 37/14 (2006.01) C03C 25/12 (2006.01) C03C 25/14 (2006.01) C03C 25/26 (2006.01)

Patent

CA 2379083

A process and apparatus for making densified glass fiber pellets (48) substantially encapsulated in a polymeric shell from chopped segments (24) of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum (41), densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube (42), drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling. Image

L'invention concerne un procédé et un appareil de production de granules (48) de fibres de verre densifiés sensiblement encapsulés dans une enveloppe polymère à partir de segments coupés (24) d'un fil de verre multifilament. Les granules densifiés peuvent être produits avantageusement par hydratation de fils de verre coupés et ensuite réduction en pastilles par passage dans un tambour rotatif (41), densification des granules obtenus par passage au tambour en un zigzag tournant ou un tube ondulant (42), séchage des granules et encapsulation de ceux-ci dans une composition polymère. Les granules obtenus présentent une meilleure résistance à la dégradation pendant le stockage et la manipulation en vrac.

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