High-density glass fibre granules
AssigneeOCV Intellectual Capital, LLC
InventorsJean-Francois Blanchard, Jean-Louis Viana, Michel Bastard, Dominique Font
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Abstract
A method for preparing glass strand pellets by stirring chopped glass strands in the presence of 10 to 25% of water, the strands being sized with a size containing an organosilane. The method performs stirring for long enough for an increase in density to be at least 67%, the stirring being performed using a single stirring equipment that at each instant imparts to the strands or forming pellets it contains the same stirring frequency, the pellets finally formed containing, after drying, at least 95 wt % glass. A film-forming agent is in contact with the glass strands during the stirring at the latest.
Claims21
A method for preparing glass strand pellets comprising:
- adding glass to a single stirring equipment having a single stirring zone, the glass including sized chopped glass strands, the strands containing contiguous glass filaments, in a presence of 10 to 25 wt % of water, and the strands having been coated with a size containing an organosilane;
- rotating the single stirring equipment to coat the glass with a film-forming agent and stir the glass for long enough to form glass fiber pellets denser than the corresponding unpelleted glass strands by at least 67%, said glass pellets being formed and densified within said single stirring zone;
- and
- forming, from the glass, the glass strand pellets containing after drying, at least 95 wt % glass.
Dependencies are inferred from the claim text.