Method and apparatus for removing additives from thermoplastic resin composition
US7235219B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2002 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/92
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is provided a treatment method of efficiently separating an additive component from a resin component for the purpose of treating and recycling a thermoplastic resin composition containing an additive. The treatment method includes heating and agitating the thermoplastic resin composition containing the additive together with a solvent for dissolving at least part of the additive at a temperature ranging from the glass transition temperature of the thermoplastic resin to the boiling point of the solvent inclusive, and separating and recovering the solvent in a liquid state in which at least part of the additive is dissolved, so that at least part of the additive is separated and removed from the thermoplastic resin composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.