Method for improvement of polybutylene pipe strength
US5082613A · kind A · utility
3Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Jul 23, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/904
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process is disclosed for the formation of polybutylene pipes having improved mechanical properties, by reduction in the rate of cooling of the extrudate used to form the pipe sections. Preferably, the ratio of the cooling bath residence time in minutes divided by the cooling water temperature in degrees Fahrenheit is selected to be in the range of from about 0.004 to about 0.010.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.