Molded body for housing, resin composition for use in forming same, and masterbatch
The purpose of the present invention is to provide a molded body that is for use as a housing and transmits electromagnetic waves such as millimeter waves but is still very dark black, a resin composition that is for use in forming the molded body for a housing and has favorable molding fluidity, and a masterbatch. This molded body for a housing is formed from a resin composition that includes a thermoplastic resin (A) and carbon nanotubes (B). The carbon nanotubes (B) have a specific surface oxygen concentration, diffraction peak half width, and Raman spectrum G/D ratio, the molded body includes 0.10-2 parts by mass of the carbon nanotubes (B) per 100 parts by mass of the thermoplastic resin (A), and the surface resistivity of the molded body is at least 1.0×10 11 Ω/□.
1 . A molded body for a housing that is formed from a resin composition that includes a thermoplastic resin (A) and carbon nanotubes (B),
wherein the carbon nanotubes (B) satisfy all of the following (1)-(3),
the molded body includes 0.10-2 parts by mass of the carbon nanotubes (B) per 100 parts by mass of the thermoplastic resin (A), and
the surface resistivity of the molded body is at least 1.0×10 11 Ω/□,
(1) a surface oxygen concentration is 1.0-5.0 mol %,
(2) in powder X-ray diffraction analysis, a diffraction peak half width of a (002) plane is 4.5° or less, and
(3) a ratio (G/D ratio) of a maximum peak intensity G within a range of 1560-1600 cm −1 to a maximum peak intensity D within a range of 1310-1350 cm −1 in a Raman spectrum is less than 0.88.
2 . The molded body for a housing according to claim 1 ,
wherein the carbon nanotubes (B) have an average diameter of 8-20 nm.
3 . The molded body for a housing according to claim 1 ,
wherein the thermoplastic resin (A) is one selected from the group consisting of a polyethylene resin, a polypropylene resin, an acrylonitrile-butadiene-styrene copolymer resin, a polycarbonate resin, a polyamide resin and a polybutylene terephthalate resin.
4 . The molded body for a housing according to claim 1 ,
wherein a thickness is 0.5-5 mm.
5 . The molded body for a housing according to claim 1 that is an in-vehicle article.