Process for forming polyarylenethioether stretched blow-molded vessel
US4863669A · kind A · utility
4Cited by
3References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 18, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Aug 18, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/904
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for forming a polyarylenethioether stretched blow molded vessel, by a modified blow molding of a substantially linear polyarylenethioether having a melt viscosity of 3,000 to 20,000 poise [at 310.degree. C., shear rate=200 sec.sup.-1 ]. The modified blow molding involves injecting the polymer in a mold to form a bottomed parison, stretching the bottomed parison along its axis by means of a rod or mandrel, and the stretched bottomed parison is then subjected to blow molding to effect lateral stretching. The blow parison is then heat set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.