초록 ▼

A system for making densified glass fiber pellets from chopped segments 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, and densifying the resulting pellets by

A system for making densified glass fiber pellets from chopped segments 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, and densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube 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.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for producing glass fiber pellets from chopped segments of multi-filament glass strand comprising:a. means for applying an aqueous hydrating solution to said chopped strand segments;b. a first tumbling means for imparting a tumbling action to said hydrated ch

[ What is claimed is:] [1.] An apparatus for producing glass fiber pellets from chopped segments of multi-filament glass strand comprising:a. means for applying an aqueous hydrating solution to said chopped strand segments;b. a first tumbling means for imparting a tumbling action to said hydrated chopped strand segments to disperse said hydrating solution and cause said chopped strand segments to align and coalesce into pellets;c. means for conveying said pellets to a second tumbling means; andd. a second tumbling means for tumbling said pellets to compact them and increase their density.