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US 12,503,613 B2Granted
Deinking method, deinking agent for use in said deinking method, and plastic substrate recovery method using same
AssigneeDIC Corporation
InventorYasuhiro Sente
Life of this patent
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Abstract
The invention provides a deinking method including a step of peeling off and removing, from a plastic substrate having an ink layer, the ink layer by using a deinking agent that contains (a) 20 mass % or more of a water-soluble solvent and (b) 0.1 mass % to 10 mass % of an inorganic base. According to the invention, it is possible to provide a deinking method that can easily peel off an ink layer printed on a plastic substrate, a deinking agent that can be used in the deinking method, and a plastic substrate recovery method using the same.
Claims6
A deinking method comprising:
- providing a plastic substrate comprising a plastic film and an ink layer formed on the plastic film;
- providing a deinking agent comprising (a) 20 mass % or more of a water-soluble solvent and (b) 0.1 mass % to 10 mass % of an inorganic base;
- providing a crusher capable of simultaneously crushing and press-feeding;
- preparing a matter comprising the plastic substrate and the deinking agent;
- a step of peeling off and removing the ink layer from the plastic substrate in the crusher while the matter is simultaneously crushed and press-fed into the crusher.
2 more elements
Dependencies are inferred from the claim text.