Patent ID: 9624400
Date: 2017-04-18
CPC Classifications: B05D,C08J,C09D,C09J,Y10T

Claim:
1. A solvated, heat seal coating mixture to be applied onto a surface of a packaging film or foil, said mixture comprising: a solvent in an amount of about 69.7% by weight; a heat seal resin, in an amount of about 24% by weight, comprising an amorphous or semi-crystalline polyester or co-polyester with a glass transition temperature (Tg) between −35° C. and 0° C. and a Ring and Ball Softening Point between 60° C. and 120° C., the heat seal resin being soluble in said solvent; a tackifying resin in an amount of about 3% by weight; and an anti-block additive comprising wax in an amount of about 1.9% by weight, silica in an amount of about 0.6% by weight, stearyl erucamide in an amount of about 0.2% by weight, and talc in an amount of about 0.6% by weight; wherein said mixture when coated on a packaging film or foil and dried to form a heat sealable coating enables heat sealing of coated surfaces face-to-face on a form, fill and seal machine at a sealing temperature as low as 70° C.