Abstract: Provided is a thermoplastic resin composition, in particular, an aliphatic polyester resin composition comprising a plasticizer which is soft, exhibits high transparency, is reduced in bleeding out and exhibits high resistance to the extraction by a paraffinic solvent; and a sheet, a film or a molded article formed from the thermoplastic resin composition. An aliphatic polyester resin composition, characterized in that it comprises 100 parts by mass of an aliphatic polyester and, as a plasticizer, 1.0 to 100 parts by mass of a specific ester compound which is an ester formed from a trivalent polyhydric alcohol and an acyl group derived from a carboxylic acid having 2 to 18 carbon atoms and has an average acylation degree of 50 to 90%.

Abstract: Provided is a thermoplastic resin composition, in particular, an aliphatic polyester resin composition comprising a plasticizer which is soft, exhibits high transparency, is reduced in bleeding out and exhibits high resistance to the extraction by a paraffinic solvent; and a sheet, a film or a molded article formed from the thermoplastic resin composition. An aliphatic polyester resin composition, characterized in that it comprises 100 parts by mass of an aliphatic polyester and, as a plasticizer, 1.0 to 100 parts by mass of a specific ester compound which is an ester formed from a trivalent polyhydric alcohol and an acyl group derived from a carboxylic acid having 2 to 18 carbon atoms and has an average acylation degree of 50 to 90%.

Abstract: The present invention relates to antistatic method for a polyester polymer or resin which is a biodegradable resin, especially polybutylene succinate, etc., having a high antistatic ability and persistence thereof, suppressing bleeding with a slight environmental load and to provide a film, a sheet and a molded product, moreover, to provide the antistatic method for the biodegradable polyester resin composition comprising a diglycerol fatty acid ester in a polyester resin having biodegradability, said polyester resin composition is at least one of polybutylene succinate, polyethylene succinate, polybutylene adipate, or polybutylene succinate adipate, constituent fatty acids of said diglycerol fatty acid ester have 16-18 Carbon atoms, and HLB of the diglycerol fatty acid ester is within the range of 4-8, moreover, the content of the diglycerol fatty acid is =0.2 to <2.0 wt. %.