Polyester resin aqueous dispersion, film obtained therefrom, and packaging bag using the film
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United States of America Patent
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Issued Date -
Apr 15, 2010
app pub date -
Sep 6, 2006
filing date -
Sep 6, 2005
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Abandoned
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Abstract
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.
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