Patent ID: 11939448
Assignee: SHIRAISHI KOGYO KAISHA, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A light reflecting body comprising:
an injection molded base containing a resin material and a calcium carbonate, the resin material being polybutylene terephthalate composition; and
a metal layer on a surface of the injection molded base, wherein
the calcium carbonate has a BET specific surface area of 1 to 15 m2/g,
the calcium carbonate has such a pore distribution curve determined by mercury porosimetry that a top of a peak representing interparticle void size is in a pore size range of 0.1 to 1.0 μm,
the calcium carbonate has such a particle size distribution determined by using an electron microscope that a proportion of particles having a particle size of 0.1 μm or less is 10% or less of the calcium carbonate, and
a residue on a sieve having a mesh size of 45 μm after wet sieving of the calcium carbonate is 0.1% or less.