Resin composition for injection molding, injection molded article, method for manufacturing injection molded article, and method for analyzing injection molded article

A method for manufacturing an injection molded article comprising:

• a first step of kneading a first thermoplastic resin, a non-fibrous first inorganic particle, and at least one of an aggregate of second inorganic particles and a resin composition of a second thermoplastic resin;
• and
• a second step of injection-molding a mixture of the first step,
• wherein a ratio of a longest first length to a shortest second length among lengths of the aggregate and the resin composition in three directions orthogonal to each other is larger than or equal to 2 and smaller than or equal to 20, and the first length is larger than or equal to 25 μm and smaller than or equal to 100 μm, and
• wherein the aggregate or the resin composition does not include the first inorganic particles having a particle diameter of larger than or equal to 25 μm.

A method for analyzing an injection molded article comprising:

• acquiring a tomographic image of an injection molded article including a first thermoplastic resin, a non-fibrous first inorganic particle, and at least one of an aggregate of second inorganic particles and a resin composition of a second thermoplastic resin;
• and
• determining an orientation of the aggregate or the resin composition in the tomographic image,
• wherein a ratio of a longest first length to a shortest second length among lengths of the aggregate and the resin composition in three directions orthogonal to each other is larger than or equal to 2 and smaller than or equal to 20, and the first length is larger than or equal to 25 μm and smaller than or equal to 100 μm, and
• wherein the aggregate or the resin composition does not include the first inorganic particles having a particle diameter of larger than or equal to 25 μm.