Abstract: A polylactic acid based resin sheet includes a layer formed of a composition (D) containing polylactic acid (A), an ionic surface active agent (B), and a nonionic surface active agent (C), wherein the polylactic acid (A) has a content of 50 mass % or more and 99.5 mass % or less in the entire 100 mass % of the composition (D), and the mass ratio between the ionic surface active agent (B) and the nonionic surface active agent (C) satisfies 2?(B)/(C)?20.

Abstract: A polylactic acid-based resin sheet including polylactic acid and rubber particles and characterized by satisfying (1) to (3): (1): 0.01 ?m?|Ra1?Ra2|?0.2 ?m; (2): Ra1?0.3 ?m and (3): Ra2?0.3 ?m where Ra1 is a two-dimensional center line average roughness of one surface of the sheet, and Ra2 is a two-dimensional center line average roughness of a surface other than that subjected to measurement of Ra1.

Abstract: A polylactic acid based resin sheet includes a layer formed of a composition (D) containing polylactic acid (A), an ionic surface active agent (B), and a nonionic surface active agent (C), wherein the polylactic acid (A) has a content of 50 mass % or more and 99.5 mass % or less in the entire 100 mass % of the composition (D), and the mass ratio between the ionic surface active agent (B) and the nonionic surface active agent (C) satisfies 2?(B)/(C)?20.

Abstract: A polylactic acid-based resin sheet including polylactic acid and rubber particles and characterized by satisfying (1) to (3): (1): 0.01 ?m?|Ra1?Ra2|?0.2 ?m; (2): Ra1?0.3 ?m and (3): Ra2?0.3 ?m where Ra1 is a two-dimensional center line average roughness of one surface of the sheet, and Ra2 is a two-dimensional center line average roughness of a surface other than that subjected to measurement of Ra1.

Abstract: A multilayer sheet includes at least three layers, including a layer A as at least one outermost layer and a layer B as an inner layer, in which the layer A includes a polylactic acid and a polybutylene succinate-based resin, wherein the polylactic acid is contained in an amount of 60% mass to 97.5% mass with all components of the layer A as 100% mass % (mass percentage of the polylactic acid with all components of the layer A as 100 mass % is “Pa”), and a rate Xa of thickness of the layer A is 10 to 40% with entire thickness of the multilayer sheet as 100%; the layer B comprises a polylactic acid and a polybutylene succinate-based resin, wherein the polylactic acid is contained in an amount of 90 mass % to less than 100 mass % (mass percentage of the polylactic acid with all components of the layer B as 100 mass % is “Pb”); and plane orientation degree (?P) is 0 to 0.002.

Abstract: Poly(lactic acid) polymer compositions each contain an appropriate poly(lactic acid) polymer and a suitable plasticizer having a polyether and/or polyester segment in combination. The compositions exhibit satisfactory flexibility and show very small amount of the evaporation, migration and extraction (bleedout) of the plasticizer and losing transparency upon heating. The poly(lactic acid) polymer compositions are useful as formed plastics such as films.

Abstract: A polyether-polylactic acid composition is excellent in storage stability, melt stability and hue. The polyether-polylactic acid composition includes a polyether and polylactic acid component and has a residual lactide content is 0.3 wt % or less, and an acid value is 50 equivalent/t or less.

Abstract: Poly(lactic acid) polymer compositions each contain an appropriate poly(lactic acid) polymer and a suitable plasticizer having a polyether and/or polyester segment in combination. The compositions exhibit satisfactory flexibility and show very small amount of the evaporation, migration and extraction (bleedout) of the plasticizer and losing transparency upon heating. The poly(lactic acid) polymer compositions are useful as formed plastics such as films.

Abstract: Poly(lactic acid) polymer compositions each contain an appropriate poly(lactic acid) polymer and a suitable plasticizer having a polyether and/or polyester segment in combination. The composition exhibit satisfactory flexibility and show very small amount of the evaporation, migration and extraction (bleedout) of the plasticizer and losing transparency upon heating. The poly(lactic acid) polymer compositions are useful as formed plastics such as films.

Abstract: Poly(lactic acid) polymer compositions of the invention each contain an appropriate poly(lactic acid) polymer and a suitable plasticizer having a polyether and/or polyester segment in combination, exhibit satisfactory flexibility and show very small amount of the evaporation, migration and extraction (bleedout) of the plasticizer and losing transparency upon heating. The poly(lactic acid) polymer compositions of the invention are useful as formed plastics such as films.

Abstract: There is provided an unopened electronic mail management method that can be implemented only using the function on the receiving side without depending on the specifications of a mail server on the sending side. When unopened electronic mail is managed according to a combination of mail addresses of a recipient and a sender and the unopened electronic mail that satisfies preset conditions (sending source and the time elapsed) exists, the unopened electronic mail is managed in accordance with a two-step notification method of posting to the mail recipient by a previously specified means, such as a telephone and a facsimile system, and posting to a mail sending source if the mail is kept unopened for all that.