Abstract: A molded article contains an aliphatic polyester-based resin composition. The aliphatic polyester-based resin composition contains an aliphatic polyester-based resin (A) containing a repeat unit derived from an aliphatic diol and a repeat unit derived from an aliphatic dicarboxylic acid as main structural units, a polyhydroxyalkanoate (B), and an inorganic filler (C). The polyhydroxyalkanoate (B) contains a 3-hydroxybutyrate unit and a 3-hydroxyhexanoate unit as main structural units. The mass ratio of the aliphatic polyester-based resin (A) to the polyhydroxyalkanoate (B) is 40/60 to 10/90. The amount of the inorganic filler (C) relative to the total amount of the aliphatic polyester-based resin (A), the polyhydroxyalkanoate (B), and the inorganic filler (C) is 15 to 50% by mass.

Abstract: A biodegradable laminate includes: an aliphatic polyester-based resin layer; a bonding layer; and a polyvinyl alcohol-based resin layer laminated on at least one surface of the aliphatic polyester-based resin layer with the bonding layer therebetween. The aliphatic polyester-based resin layer includes an aliphatic polyester-based resin composition containing an aliphatic polyester-based resin (A) including a repeating unit derived from an aliphatic diol and a repeating unit derived from an aliphatic dicarboxylic acid as main constituent units, a polyhydroxyalkanoate (B) including a 3-hydroxybutyrate unit as a main constituent unit, and an inorganic filler (C).

Abstract: The present invention relates to a polyester resin composition comprising: (A) a polyester resin containing 5% by mole or more and not more than 86% by mole of a succinic acid unit in the whole of an aliphatic dicarboxylic acid unit; (B) a polyester resin containing 5% by mole or more and not more than 95% by mole of an aromatic dicarboxylic acid unit in all of dicarboxylic acid units; and (C) a polyester resin containing an aliphatic oxycarboxylic acid, wherein the polyester resin composition contains from 10 to 89% by weight of the resin (A) and from 11 to 90% by weight of the resin (B) relative to a total sum of the resins (A) and (B) and contains from 1 to 40% by weight of the resin (C) relative to a total sum of the resins (A), (B) and (C).

Abstract: The present invention relates to a polyester resin composition comprising: (A) a polyester resin containing 5% by mole or more and not more than 86% by mole of a succinic acid unit in the whole of an aliphatic dicarboxylic acid unit; (B) a polyester resin containing 5% by mole or more and not more than 95% by mole of an aromatic dicarboxylic acid unit in all of dicarboxylic acid units; and (C) a polyester resin containing an aliphatic oxycarboxylic acid, wherein the polyester resin composition contains from 10 to 89% by weight of the resin (A) and from 11 to 90% by weight of the resin (B) relative to a total sum of the resins (A) and (B) and contains from 1 to 40% by weight of the resin (C) relative to a total sum of the resins (A), (B) and (C).

Abstract: An aliphatic polyester polyether copolymer is provided having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and a polyether moiety, wherein ?sp/C is not less than 1.40 and the ratio by weight of the polyether moiety to the aliphatic polyester polyether copolymer is 0.1 to 90% by weight.

Abstract: The object of the present invention is to provide an aliphatic polyester polyether copolymer having biodegradability and a sufficient mechanical strength for practical use. An aliphatic polyester polyether copolymer having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and a polyether moiety, wherein ?sp/C is not less than 1.40 and the ratio by weight of the polyether moiety to the aliphatic polyester polyether copolymer is 0.1 to 90% by weight.