Controlling the crystallization of polyesters by means of their water content
US7193032B2 · kind B2 · utility
20Cited by
5References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 4, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2077/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods are disclosed herein to reduce and/or eliminate agglomerations and deformations of pellets comprised of crystallizable thermoplastic polymer material during a crystallization or crystallization of the pellets. As described herein, polymer material is subjected to one or more conditioning steps prior to crystallization, in which a controlled moisture content and/or controlled moisture profile is set in the material, or in which the polymer material was obtained via solidification from a polymer melt in such a way that the polymer material has a defined initial moisture profile before the crystallization step
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.