Abstract: Provided are a method for producing pellets that are easy to be uniformly molded at the time of using the pellet for molding even when the pellets include a large amount of inorganic substance particles, the pellets, and a method for molding a resin molded article. The method for producing pellets according to the present invention includes a method for producing pellets formed from a resin composition including a crystalline macromolecule and an inorganic fine powder or organic fine powder in a mass ratio of 50:50 to 20:80, the method including the step of kneading the crystalline macromolecule and the inorganic fine powder or the organic fine powder so that the microcrystalline size of the crystalline macromolecule is 190 ? or smaller. The pellets according to the present invention are pellets formed from a resin composition including a crystalline macromolecule having a microcrystalline size of 190 ? or smaller, and inorganic substance particles in a mass ratio of 50:50 to 20:80.

Abstract: Provided is a sheet not generating feeding failure in a device having a heat setting process even when a large amount of an inorganic filler is included and a thermoplastic resin composition for forming the sheet. The thermoplastic resin composition may include at least a thermoplastic resin and an inorganic filler, in which the thermoplastic resin includes polypropylene having no long chain branch (B) and polypropylene having a long chain branching structure (A) in a mass ratio of 80:20 to 98:2.

Abstract: An object of the present invention is to provide a technique capable of reducing the hydrolysis of a biodegradable resin at the time of molding with respect to a biodegradable resin-containing resin composition having a high water content. Provided is a resin composition comprising: a biodegradable resin and heavy calcium carbonate particles in a mass ratio of 50:50 to 10:90, in which 0.5% by mass or more and 3.5% by mass or less of calcium oxide is comprised relative to the resin composition, and 0.2% by mass or more of water is comprised relative to the resin composition.

Abstract: Provided is a sheet not generating feeding failure in a device having a heat setting process even when a large amount of an inorganic filler is included and a thermoplastic resin composition for forming the sheet. The thermoplastic resin composition may include at least a thermoplastic resin and an inorganic filler, in which the thermoplastic resin includes polypropylene having no long chain branch (B) and polypropylene having a long chain branching structure (A) in a mass ratio of 80:20 to 98:2.

Abstract: Provided is a method for producing a foamable sheet with a convenient process. The method for producing a sheet includes the steps of: molding a resin composition including a thermoplastic resin and inorganic substance particles in a ratio of 80:20 to 20:80 and further including a foaming agent into a sheet-like product and stretching the sheet after being molded. The foaming agent preferably includes a polyethylene resin as a carrier resin and a hydrogencarbonate as an active component that acts as a thermally decomposable foaming agent serving as a foam nucleating agent.

Abstract: Provided are a method for producing pellets that are easy to be uniformly molded at the time of using the pellet for molding even when the pellets include a large amount of inorganic substance particles, the pellets, and a method for molding a resin molded article. The method for producing pellets according to the present invention includes a method for producing pellets formed from a resin composition including a crystalline macromolecule and an inorganic fine powder or organic fine powder in a mass ratio of 50:50 to 20:80, the method including the step of kneading the crystalline macromolecule and the inorganic fine powder or the organic fine powder so that the microcrystalline size of the crystalline macromolecule is 190 ? or smaller. The pellets according to the present invention are pellets formed from a resin composition including a crystalline macromolecule having a microcrystalline size of 190 ? or smaller, and inorganic substance particles in a mass ratio of 50:50 to 20:80.

Abstract: A method for producing a resin molded product having good surface smoothness, a method for producing pellets for resin molding, and a method for improving the smoothness of the surface of the resin molded product may be provided. The method for producing a resin molded product may include: a molding step of molding pellets of a resin composition including a thermoplastic resin and inorganic particles, in which a content of water contained in the pellets is 0.55% by mass or lower relative to the mass of the inorganic particles included in the pellets; and the content of the inorganic particles included in the resin composition is 30% by mass or higher relative to the total amount of the resin composition.