THERMOPLASTIC RESIN COMPOSITION TO BE USED IN ELECTROMAGNETIC WAVE ABSORBER, AND MOLDED ARTICLE

• Main Authors: MAJIMA Yuki, MASUDA Keisuke, YANAGISAWA Makoto, SAITO Moe
• Format: Patent
• Language: English; French; German
• Published: 06.03.2024
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PRINTED CIRCUITS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Provided is a thermoplastic resin composition capable of obtaining uniform electromagnetic absorption performance with no in-plane variation in a molded article thereof as a result of the fluidity being favorable in addition to the reflection loss and transmission loss being high. A thermoplastic resin composition according to the present disclosure which is to be used in an electromagnetic wave absorber and contains a thermoplastic resin (A) and carbon nanotubes (B), wherein the carbon nanotubes (B) satisfy formulas (1) and (2), and a sheet having a thickness of 100µm and formed from the thermoplastic resin composition has a sheet surface maximum height Sz of 5µm or less when measured according to ISO 25178. (1) The full width at half maximum of the diffraction peak of the (002) plane in powder X-ray diffraction analysis is 2.0-6.0°. (2) The ratio (G/D) of the maximum peak intensity G in a 1,560-1,600 cm-1 range in a Raman spectrum to the maximum peak intensity D in a 1,310-1,350 cm-1 range therein is 0.5-2.0.