Method and apparatus for crystallizing polymer particles
US7250486B1 · kind B1 · utility
13Cited by
18References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is a process and apparatus for conserving loss of heat while forming and crystallizing polymer particles in a liquid. The cooling liquid quenches the polymer during particle molding to facilitate shaping. The cooling liquid cools the polymer particles not below a temperature that allows adequate crystallization to occur. Cooling liquid is quickly switched with a warming liquid, so the temperature of the polymer is in the crystallization range and the heat of crystallization self-heats the polymer to a higher temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.