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https://www.adhesive4laminating.com/products/pu-resin-for-ink/
The liquid flexible packaging ink is made by resin, pigment, additives and solvent. And the pu resin for ink (also called ink binder)is the core of the ink, due to the PU advantage, now PU resin for ink (ink binder) becomes more and more popular, especially for the retorting application. We have the plasticizer, semi-film-former and film-former PU resin for gravure ink. These polyurethane ink binders are widely used for surface printing ink and lamination ink in both flexo and gravure printing technology.