Patent ID: 9630371
Date: 2017-04-25
CPC Classifications: B31B,C01P,C08K,C09C,C09D,H01F,Y10T

Claim:
1. A web or sheet of a packaging laminate for reforming into a plurality of packaging containers for food through folding and sealing, the packaging laminate comprising: a base layer of paper or paperboard; at least one layer of plastic coating; and a plurality of spaced apart print marks of a magnetisable ink, the print marks of the magnetisable ink being spaced apart so that there is at least one print mark of the magnetizable ink per packaging container; the magnetisable ink comprising magnetisable particles, a solvent, an antifoaming agent additive, and a binder to disperse the magnetisable particles and to ensure adhesion to the packaging laminate; the magnetisable particles possessing a size between 0.1 and 2.5 μm; the print marks of the magnetisable ink being applied directly to a surface of the base layer of the paper or paperboard; the binder being between 20 and 60 percent of the weight of the magnetisable ink; the magnetisable particles being between 15 and 40 percent of the weight of the magnetisable ink; and the antifoaming agent additive comprising silicone or mineral oil.