Abstract: A precursor composition which can produce a polyimide film with excellent light transmittance, mechanical properties, coefficient of linear thermal expansion and resistance to thermal decomposition; and a polyimide film obtained from the precursor composition. The polyimide precursor composition contains a polyimide precursor with a repeating unit represented by formula (I); an imidazole compound in an amount more than 0.01 mol and 2 mol or less based on one mol of the repeating units of the polyimide precursor, and a solvent. In general formula I, 70 mol.

Abstract: A polylactic acid resin composition contains a polyactic acid resin satisfying: (1) the polylactic acid resin has a melt viscosity of 2,000 to 40,000 Pa·s at 190 degrees C.; and (2) the polylactic acid resin has a region of a weight average molecular weight Mw of 1,000 or less of 10 or less percent and a region of a weight average molecular weight Mw of 500,000 or more of 20 or more percent in a region of a weight average molecular weight Mw of 100 or more of a molecular weight distribution as measured by gel permeation chromatography, wherein the polylactic acid resin accounts for 90 or more percent of the polylactic acid resin composition.

Abstract: A foamed sheet including: a polylactic acid; and a filler, wherein the foamed sheet has a compressive stress of 0.2 Mpa or less when the cushioning coefficient of the foamed sheet is 10 or less; and wherein the foamed sheet has a puncture strength of 2 N or more when the sheet thickness of the foamed sheet is 2 mm.

Abstract: A polylactic acid resin composition includes a polylactic acid resin in an amount of 99% by mass or more. A complex viscosity ?*(20) of the polylactic acid resin composition is 2×103 Pa·s or higher. A ratio of the complex viscosity ?*(20) to a complex viscosity ?*(5), which is represented by [?*(20)/?*(5)], is 0.6 or higher. The complex viscosity ?*(5) and the complex viscosity ?*(20) are complex viscosities respectively measured 5 minutes and 20 minutes after the start of measurement using a parallel plate-type rotary viscometer under measurement conditions below: [Measurement Conditions] Parallel plates: 20 mm in diameter, made of aluminum; Temperature: 200° C.; Gap between the parallel plates: 1.00 mm; Frequency: 1 Hz (6.28 rad/s); Atmosphere: under dry air (dew point: ?60° C.); and Size of measurement sample: a strip that is 30 ?m thick, 7 mm wide, and 35 mm long.

Abstract: An aliphatic polyester resin composition contains an aliphatic polyester resin and a cross-linking agent, wherein the proportion of the gel proportion of the aliphatic polyester resin composition is less than 5 percent, wherein the weight average molecular weight of the aliphatic polyester resin composition after the aliphatic polyester resin composition is melted at 200° C. for 10 minutes increases by 50,000 or greater compared to the weight average molecular weight of the aliphatic polyester resin composition before the aliphatic polyester resin composition is melted at 200° C. for 10 minutes.

Abstract: A composition includes a crystalline polymer and a compound that denatures at a temperature equal to or lower than a melting point of the crystalline polymer. The composition is substantially free from a solvent.

Abstract: A foam sheet contains an aliphatic polyester resin, a nucleating agent for foaming, and hydrofluoroolefin, wherein the nucleating agent accounts for 0.05 to 2 percent by mass of the foam sheet.

Abstract: A foamed body includes a polylactic acid resin. An amount of the polylactic acid resin is 99.5% by mass or greater relative to a total amount of organic matter in the foamed body. A gel fraction of the foamed body is 0.1% or less. An expansion ratio of the foamed body is 5 times or greater.

Abstract: A foamed sheet includes an aliphatic polyester resin and a filler. An average foam diameter of the foamed sheet is 15 micrometers or less. An average thickness of the foamed sheet is 3,000 micrometers or less. A ratio of a length of a side of the foamed sheet in a longer direction or a side of the foamed sheet in a direction perpendicular to the longer direction to the average thickness is 250 or more.

Abstract: A foamed sheet includes an aliphatic polyester resin and a filler. A degree of hydrophohization of the filler is 50% by mass or more, and a pH of the filler is 6.5 or lower. A manufacture includes the foamed sheet and a method can be used for producing the foamed sheet.

Abstract: An aliphatic polyester resin composition including: an aliphatic polyester resin; and calcium carbonate, wherein an amount of the calcium carbonate in the aliphatic polyester resin composition is 20% by mass or more, a number average particle diameter of the calcium carbonate in the aliphatic polyester resin composition is 0.20 ?m or more but less than 0.40 ?m, and a standard deviation of the number average particle diameter is 0.3 or more but 0.6 or less.

Abstract: A polylactic acid composition includes polylactic acid and a filler. An amount of the filler in the polylactic acid composition is 50% by mass or less, and the polylactic acid in the polylactic acid composition has a weight average molecular weight (Mw) of 150,000 or more and a molecular weight distribution (Mn/Mw) of 1.5 or more but 2.0 or less.

Abstract: Provided is a foam sheet including a composition including polylactic acid. The polylactic acid includes, as monomer units, D-lactic acid and L-lactic acid, and an amount of the D-lactic acid or the L-lactic acid in the polylactic acid is 90 mol % or greater but less than 98 mol %. An amount of the polylactic acid is 97% by mass or greater relative to a total amount of organic matter in the foam sheet. When the foam sheet is cut into a square test piece, and the test piece is heated and stored for 90 minutes in a hot air circulation dryer a temperature of which is maintained at 90° C.±2° C., a change rate of an area of the test piece before and after the heat storage is within ±15%. An average thickness of the foam sheet is 0.5 mm or greater.

Abstract: A foamed sheet including: a polylactic acid; and a filler, wherein the foamed sheet has a compressive stress of 0.2 Mpa or less when the cushioning coefficient of the foamed sheet is 10 or less; and wherein the foamed sheet has a puncture strength of 2 N or more when the sheet thickness of the foamed sheet is 2 mm.

Abstract: Provided is a foam sheet includes a composition including polylactic acid. The polylactic acid includes, as monomer units. D-lactic acid and L-lactic acid, and an amount of the D-lactic acid or the L-lactic acid in the polylactic acid is 98 mol % or greater. An amount of the polylactic acid is 98% by mass or greater relative to a total amount of organic matter in the foam sheet. Bulk density of the foam sheet is 0.063 g/cm3 or greater but 0.125 g/cm3 or less.

Abstract: A method of manufacturing an aliphatic polyester resin composition is provided. The method includes kneading an aliphatic polyester resin and a filler at a temperature lower than a melting point of the aliphatic polyester resin in the presence of a compressible fluid.

Abstract: A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The toner satisfies the following relations (1) and (2): 3.0×102?G?(50)/G?(80)??(1) T(107)?75 degrees C.??(2) where G?(50) represents a storage elastic modulus at 50 degrees C., G?(80) represents the storage elastic modulus at 80 degrees C., and T(107) represents a temperature at which the storage elastic modulus is 107 Pa or higher during a temperature fall from 100 degrees C. to 30 degrees C., in a measurement of dynamic viscoelasticity of the toner.

Abstract: A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The binder resin comprises a polyester resin comprising a crystalline polyester resin. The crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner. The toner satisfies the following relation: G?(50)/G?(90)?6.0×102 where G?(50) and G?(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively.

Abstract: An aliphatic polyester resin composition including: an aliphatic polyester resin; and calcium carbonate, wherein an amount of the calcium carbonate in the aliphatic polyester resin composition is 20% by mass or more, a number average particle diameter of the calcium carbonate in the aliphatic polyester resin composition is 0.20 ?m or more but less than 0.40 ?m, and a standard deviation of the number average particle diameter is 0.3 or more but 0.6 or less.

Abstract: A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The toner satisfies the following relations (1) and (2): 3.0×102?G?(50)/G?(80)??(1) T(107)?75 degrees C.??(2) where G?(50) represents a storage elastic modulus at 50 degrees C., G?(80) represents the storage elastic modulus at 80 degrees C., and T(107) represents a temperature at which the storage elastic modulus is 107 Pa or higher during a temperature fall from 100 degrees C. to 30 degrees C., in a measurement of dynamic viscoelasticity of the toner.