Biodegradable packaging film

This packaging film contains a biodegradable base film, a print layer containing a biodegradable adhesive, and a surface coating to prevent thermal adhesion. For packaging purposes, the edges of the film are heat sealed to make it into a bag or a cartridge. The base film is a paper sheet and can be used in folding or crimping packages. The print layer and coating are sulfonate-containing aromatic polyesters. For example, a polylactic acid film is printed with an ink containing propiolactone-glycerol copolymer, and a heat-sealing strength is obtained by coating a composition containing propiolactone-glycerol copolymer and nitrocellulose onto a printing surface. .40 N/15 mm packaging film.