Title:
DEINKING METHOD, DEINKING AGENT FOR USE IN SAID DEINKING METHOD, AND PLASTIC SUBSTRATE RECOVERY METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/190871
Kind Code:
A1
Abstract:
The present invention is a deinking method characterized by having a step in which an ink layer is removed from a plastic substrate having an ink layer by using a deinking agent that contains (a) at least 20 mass% of an aqueous solvent and (b) 0.1-10 mass% of an inorganic base. The present invention makes it possible to provide a deinking method that can easily remove an ink layer printed upon a plastic substrate, a deinking agent that can be used in the deinking method, and a plastic substrate recovery method using the method and the agent.
Inventors:
SENTE YASUHIRO (JP)
Application Number:
PCT/JP2022/007444
Publication Date:
September 15, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
B29B17/02; C09D9/00; C09D9/04
Domestic Patent References:
| WO2020059516A1 | 2020-03-26 |
Foreign References:
| JPH06220245A | 1994-08-09 | |||
| JP2002179955A | 2002-06-26 | |||
| JPH10292138A | 1998-11-04 | |||
| CN101318361A | 2008-12-10 | |||
| JP2016153176A | 2016-08-25 | |||
| JPH08164524A | 1996-06-25 | |||
| JP2018024724A | 2018-02-15 | |||
| JP2021160350A | 2021-10-11 | |||
| JP2020506290A | 2020-02-27 |
Other References:
SCIENCE ADVANCES, vol. 3, no. 7, 19 July 2017 (2017-07-19), pages e1700782
Attorney, Agent or Firm:
OGAWA Shinji (JP)
Download PDF: