POLYESTER RESIN AQUEOUS DISPERSION, COATING FILM OBTAINED FROM SAME, AND PACKAGING BAG USING SUCH COATING FILM

摘要

A polyester resin aqueous dispersion, comprising:a polyester resin (A) having a number-average molecular weight of 5,000 or more and a glass transition temperature of 50°C or higher anda polyester resin (B) having a number-average molecular weight of 9,000 or more and a glass transition temperature of 30°C or lower at a rate (A)/(B) in the range of 80/20 to 20/80 (by mass),giving a resin film superior in adhesive properties, without cracks, and superior in blocking resistance even when formed at low temperature, and superior in bonding properties even when heat-sealed at low temperature, a film obtained by removing an aqueous medium therefrom, and a packaging bag with the film heat-sealed.