Method of recycling laminated molding
US8119699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2004 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Jul 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of recycling a laminate shaped product, including the steps of: breaking a shaped product having a laminate structure including at least one layer of aliphatic polyester resin in addition to a principal resin layer, storing resultant broken pieces in a moisturizing environment to adjust a moisture content of the aliphatic polyester resin (layer) to at least 0.5 wt. %, and then washing the broken pieces with alkaline water to remove the aliphatic polyester resin layer, thereby recovering the principal resin. As a result, it becomes possible to shorten an induction period in the alkaline water washing step that is a principal process step, thereby rationalizing the entire process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.