| abstract |
(57) [Summary] Polyamide (nylon 6 or copolymer thereof) And a composite material comprising montmorillonite and low specific gravity and having excellent mechanical strength, elastic modulus, toughness and heat resistance. SOLUTION: It is composed of polyamide (nylon 6 or a copolymer thereof) and montmorillonite, has a specific gravity of 1.17 or less, a tensile modulus of 3000 MPa or more, a tensile elongation of 30% or more, A composite material with a heat distortion temperature of 120 ° C or higher under a 1.86 MPa load. |