Patent ID: 11969984

Abstract:
A laminate includes a core obtained by impregnating a mat of fibers with a thermoplastic resin (B); and a skin obtained by impregnating continuous fiber(s) with a thermoplastic resin (A), wherein sheet-form intermediate substrates in the laminate have a thermal expansibility, the usable temperature region of said thermoplastic resin (A) and that of said thermoplastic resin (B) overlap over a temperature range of at least 5° C., said thermoplastic resin (A) has a temperature region that does not melt at a lower limit of said usable temperature region, said fibers contained in said mat penetrate through interface layers formed by said thermoplastic resin (A) and said thermoplastic resin (B), and said thermoplastic resin (A) and said thermoplastic resin (B) form interface layers each with a concave-convex shape having a maximum height Ry of not less than 50 μm and an average roughness Rz of not less than 30 μm.