Core material for laminate and method for manufacturing the same

摘要

A core material for laminates is provided, which is comprised of a substrate and a porous sheet laminated on one side of the substrate, said substrate having slits which penetrate therethrough in rows at an appropriate interval. The core material permits no inclusion of air inside when laminated with an FRP and putty is filled in the core material, with a result that the putty not only functions as a reinforcing rib, but prevents water-containing phenomenon.