Patent ID: 7235294

Claim:
A water based cold seal cohesive coating for bonding one or more substrates together to form a flexible package to contain an article, said cohesive coating comprising the following components: about 25% to about 90% by weight of a natural rubber latex emulsion; about 10% to about 75% by weight of a non-self-crosslinking acrylic emulsion; about 0.01% to about 10% by weight water; and one or more ingredient selected from an anti-foam agent, ammonium hydroxide, a surfactant, an anti-blocking agent, an inert filler, and a conditioning agent; so that in combination the components total 100% by weight of said cohesive coating wherein the cohesive coating forms a peelable and non-resealable closure for a flexible package, said closure having a cohesive strength of at least about 300 g/inch after being dried on a substrate for said package at a temperature of at least about 260° F.