Extrusion process for mixtures of elastomer particles and resin particles
US3984509A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/40
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for extruding thermoplastic elastomeric film using a single screw extruder to extrude a particular type of a potentially sticky dry particulate mixture comprising relatively high molecular weight thermoplastic elastomer particles and relatively low molecular weight resin particles wherein the particulate mixture is fed starved, advanced axially, and prevented from sticking to the screw by mechanically displacing the mixture rotatively with respect to the screw in a prescribed portion of the feed section of the extruder, thereby preventing surging or uneven extrusion due to irregular feeding of the potentially sticky mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.