Continuous production process of high-strength and high-modulus polyolefin material
US5091133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/251
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A high-strength and high-modulus polyolefin material can be continuously produced from a polyolefin in a powder form by feeding the polyolefin powder between a combination of endless belts disposed in an up-and-down opposing relation, compression-molding the polyolefin powder at a temperature lower than the melting point of the polyolefin powder by means of a pressing device while holding the polyolefin powder between the endless belts and conveying the same, and then rolling and stretching the resultant compression-molded polyolefin. The pressing device is constructed of pressing platens and corresponding sets of rollers, which are all accommodated within the respective endless belts. The rollers in each set are connected together, and the sets of rollers are arranged movably in an endless fashion between the respective platens and the endless belts associated therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.