Method and installation for increasing the intrinsic viscosity of polyester material by solid phase polycondensation
US8088885B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 13, 2006 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Jun 28, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2067/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An installation for increasing the intrinsic viscosity of a polyester material by solid phase polycondensation (SSP) comprises a heatable reaction container (2, 2′) in which the polyester material (P) can be left to reside at a predetermined thermal treatment temperature for a predetermined residence time until it has reached a desired intrinsic viscosity, and a cooling container (6, 6′) arranged downstream of the reaction container, the cooling container (6, 6′) being designed for cooling the polyester material discharged from the reaction container to a first cooling temperature which is lower than the reaction temperature. Downstream of the cooling container (6, 6′), a polyester material separator (7) is arranged which is designed for diverting the polyester material flow to a polyester material processing machine (8) and/or to an intermediate storage container (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.