System for preparing polymer encapsulated glass fiber pellets
US6365090B1 · kind B1 · utility
15Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1999 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jul 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2907
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process and apparatus for making densified glass fiber pellets substantially encapsulated in a polymeric shell 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, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.