I.N.K.
Intelligent Non-toxic Kure-linking
Print & Ink Coating Crosslinker
Problem Statement
Printing inks and overprint varnishes (OPV) for food packaging, labels, and commercial print use acrylic or polyurethane binders crosslinked with aziridines, carbodiimides, or melamine-formaldehyde resins to achieve rub/scratch resistance and chemical resistance. Aziridines are mutagenic; melamine releases formaldehyde. For food-contact packaging (Nestlé, Unilever, etc.), brand owners increasingly mandate PFAS-free, formaldehyde-free, and low-migration ink systems. The ink industry needs a food-grade crosslinker for acrylic ink binders.
Market Size
$4.2B global packaging ink market; overprint varnish/coating ~$1.5B
Regulatory Drivers
Swiss Ordinance (SR 817.023.21) positive list for food-contact printing inks. EU anticipated Printing Inks Regulation (in development). Nestlé Guidance Note on Packaging Inks. EuPIA Good Manufacturing Practice. FDA 21 CFR 175/176 for food-contact coatings.
Enterprise Interest
No enterprise interest recorded yet. Companies can indicate their volume and urgency to help guide research priorities.
Success Criteria
Sutherland rub resistance ≥90% of aziridine-crosslinked control (50 cycles, 1.8 kg). Adhesion ≥4B (ASTM D3359). MEK double rubs ≥50. Migration <10 µg/dm² total set-off. Zero formaldehyde, zero mutagenic compounds.
Equipment Needed
Waterborne acrylic ink/OPV base, drawdown bar, forced-air oven, Sutherland rub tester, scratch test apparatus, adhesion tape (ASTM cross-cut), chemical resistance test reagents, coated paper and film substrates
Existing References
Reference list will be published with protocols.
Protected Research Content
This section contains detailed protocols, proposed mechanisms, experiment designs, and safety information.
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