Composite molded article, laminate, and method for producing composite molded article

A composite molded article in which aliphatic polyester-based resin expanded beads, which have been subjected to crystallization progressing treatment at an expanded beads stage, and a thermosetting resin cured product containing a reinforcing fiber, which is formed between the expanded beads, are integrally fixed,

• wherein the aliphatic polyester-based resin is a crystalline polylactic acid-based resin,
• wherein the thermosetting resin is one or more selected from the group consisting of an unsaturated polyester-based resin and an epoxy-based resin,
• wherein the reinforcing fiber is one or more selected from the group consisting of a glass fiber, a carbon fiber, and a vinylon fiber, and a fiber length L of the reinforcing fiber is 0.05 mm to 20 mm, and a value of L/D, which is a ratio of the fiber length L and an average diameter D of a fiber cross-section, is 2 or more,
• wherein a content of the reinforcing fiber in the thermosetting resin cured product is 3% by weight to 50% by weight,
• wherein the reinforcing fiber is dispersed in the thermosetting resin, and
• a flexural modulus E (MPa) of the composite molded article and a density ρ (kg/m3) of the composite molded article satisfy the following Expression (1):
• E1/3 /ρ≥0.020 [(MPa)1/3(kg/m3)−1] (1).