| abstract |
[PROBLEMS] To provide a molding material suitable for a use and a member in which characteristics relating to rigidity, impact resistance and human body protection are particularly required. A skin layer is a sandwich material made of a shock absorbing material made of organic fibers and a thermoplastic resin, and a core layer containing a high-rigidity material made of reinforcing fibers and a resin. The fiber has a melting point of 200 ° C. or higher, and the form thereof is a twisted yarn cord, or a woven or knitted fabric composed of a twisted yarn cord. A sandwich material having an elasticity (E) of 2.5 or more. E = M / D / 9.8 (1) (E is specific elasticity, M is the elastic modulus (MPa) of the fiber, and D is the density of the fiber (g / cm 3 )) [Selection figure] None |