Extrusion blow molding of thermotropic liquid crystalline polymers
US5336464A · kind A · utility
4Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0065
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extrusion blow molding process for a heat-treated, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.