Molding material, molded part, and method for manufacturing them

A method for manufacturing a molding material, the method comprising:

• a biodegradable resin cross-linking product powder preparation step of preparing a biodegradable resin cross-linking product powder, the step including:
• a step (A) of preparing a kneaded product containing a biodegradable resin component and a cross-linkable monomer;
• a step (B) of cross-linking the biodegradable resin component to form a biodegradable resin cross-linking product;
• a step (C) of pulverizing the kneaded product or the biodegradable resin cross-linking product into a powder;
• and
• a biodegradable resin composite powder preparation step of preparing a biodegradable resin composite powder, the step including:
• a step (D) of swelling the biodegradable resin cross-linking product powder with an impregnant containing a polymerizable monomer to impregnate the biodegradable resin cross-linking product powder with the impregnant,
• wherein the impregnant in the impregnation is set at a temperature of 60° C. or higher, and lower than or equal to the melting point or the degradation temperature of the biodegradable resin component.