THERMOPLASTIC RESIN COMPOSITION HAVING REDUCED IMPACT NOISE AND MOLDED BODY HAVING REDUCED IMPACT NOISE.

摘要

[Problem] To provide a thermoplastic resin composition that can provide molded articles that are not only highly rigid but that also generate less impact noise. [Solution] A thermoplastic resin composition that has a bending modulus of 1850 MPa or higher as measured in accordance with ISO 178 and that has a maximum sound pressure value of 2.0 Pa/N or lower over a range of 20-20,000 Hz as measured under the following conditions: A test piece that is an integrally molded article that is shaped to comprise a rectangular main body that is 120 mm long, 60 mm wide, and 3 mm thick and a trapezoidal protrusion that has a 40 mm lower base and a 20 mm upper base, is 8 mm tall and 1.5 mm thick, and is positioned upon an upper end of the main body is suspended by two strings that are taped to the protrusion, a sound pressure microphone that is arranged 12 cm from one surface of the test piece in the perpendicular direction is used to collect the sound generated when the center of said surface is struck by a stainless steel hammer with 20±5 N of force, and measurements are taken on the basis of a sound pressure frequency spectrum found from the collected sound.