Tohcello Co., Ltd.

Tohru Sawai

Junichi Narita

Hiroyuki Wakaki

Suekazu Itoh

Ichiro Takeishi

Disclosed is a biaxially stretched polylactic acid multilayer film and the use thereof as packaging film. The gist of the biaxially stretched polylactic acid multilayer film resides in the construction wherein a substrate layer (1) of the biaxially stretched film comprised of polylactic acid (A) has been laminated on at least one surface thereof with a coating layer (II) of an aliphatic polyester composition (D) comprised of 97&#x2dc;5% by weight of an aliphatic polyester copolymer (B) having a melting point (Tm) of 80&#x2dc;120&#xb0; C., a crystallizing temperature (Tc) of 35&#x2dc;75&#xb0; C. and a difference of (Tm)&#x2212;(Tc) within the range of 35&#x2dc;55&#xb0; C. and comprising an aliphatic or alicyclic dicarboxylic acid component (b1), an aliphatic or alicyclic dihydroxyl compound component (b2) and a difunctional aliphatic hydroxycarboxylic acid component (b3) and 3&#x2dc;95% by weight of a polylactic acid copolymer (C) containing 7&#x2dc;30% by weight of D-lactic acid, a total of the ingredients (B) and (C) being 100% by weight.

Biaxially stretched polylactic acid multilayer film and the use thereof

Disclosed is a composition provided with biodegradable property and transparency which is excellent in heat sealing property at low temperatures, peelability and adhesiveness to substrate as well as a film or laminate of the composition. The composition comprises as indispensable components thereof 27-70% by weight of polylactic acid, 70-27% by weight of an aliphatic polyester, and 1-20% by weight of a tackifier selected from the group consisting of: an aliphatic cyclic hydrocarbon resin, a metal salt of a rosin ester, and a rosin ester having an acid number of 10 or less.

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Ibaraki-ken, Japan

Tohru Sawai