Coatings comprising antimicrobial active ingredients for food packaging

A sheet-like element suitable for use in a food packaging, the sheet-like element comprising:

• a) a coating layer comprising a cohesive coating, said cohesive coating comprising:
• a.1) 100 parts by weight of a particulate filler comprising an untreated surface-reacted calcium carbonate in an amount of at least 50 wt.-%, based on the total amount of the particulate filler,
• wherein the untreated surface-reacted calcium carbonate is a reaction product of natural ground calcium carbonate or precipitated calcium carbonate with carbon dioxide and one or more H3O+ ion donors, wherein the carbon dioxide is formed in situ by the H3O+ ion donors treatment and/or is supplied from an external source, and
• wherein the untreated surface-reacted calcium carbonate has a specific surface area in the range from 20 to 200 m2/g, as measured by the BET method,
• a.2) 0.1 to 10 parts by weight of a dispersant, and
• a.3) 8 to 30 parts by weight of a polymeric binder;
• and
• b) a substrate layer,
• wherein the coating layer is an evenly distributed coating layer on the substrate layer and adheres to the substrate layer, thereby forming the sheet-like element, and
• wherein the coating layer has (i) a total intruded specific pore volume in the range from 0.25 to 2 cm3/g, as measured by mercury intrusion porosimetry and (ii) a fluid receptivity in the range from 1 to 50 wt.-%, based on the total weight of the coating layer.