Patent ID: 8617696

Claim:
A multilayered aliphatic polyester film comprising a first resin layer and a second resin layer laminated on one or both sides of the first resin layer, wherein: the first resin layer is formed from a polylactic-based polymer comprising L-lactic acid in an amount ranging from 98 to 100% by weight, and the second resin layer is formed from one polylactic-based polymer comprising D-lactic acid in an amount ranging from 5 to 10% by weight; and the polyester film has a heat of fusion (Î”Hm) of 1.0 to 10 J/g and a haze of 20% or less after being subjected to hot bath treatment at 85Â° C. for 30 minutes, and a heat adhesive strength of 800 to 1500 gf/inch.