Advanced polymer/wood composite pellet process
US5441801A · kind A · utility
120Cited by
133References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Feb 12, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3188
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for making a polyvinyl chloride and wood composite pellet by extrusion. The polyvinyl chloride and wood fiber are introduced into the extruder at a ratio of approximately 6:4 by weight, respectively. The polyvinyl chloride is melted and blended with the wood fiber so that the interstitial voids of the wood fiber are filled with polyvinyl chloride. After being extruded through a die, the molten material is cut into pellets having a bulk density of preferably between 0.7 to 0.8 gm/mm.sup.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.