Patent ID: 11913617
Assignee: IDEMITSU KOSAN CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An internal part for a lighting tool for a vehicle, comprising:
an entering portion from which light enters;
an emitting portion from which the entered light is emitted; and
a light-guiding portion configured to guide the light that has entered from the entering portion to the emitting portion,
the internal part being arranged at a distance of 5 mm or less from a light source,
wherein the internal part is a molded body formed of a resin composition,
wherein a 5-millimeter thick plate, which is obtained by subjecting the resin composition to injection molding under conditions of a cylinder temperature of 260° C., a die temperature of 80° C., a cycle time of 50 seconds, and a retention time of 230 seconds, has a total light transmittance of 80% or more, and
wherein a ratio (X/Y) of a spectral light transmittance (X) of the 5-millimeter thick plate at a wavelength of 350 nm to a spectral light transmittance (Y) thereof at a wavelength of 400 nm is 0.75 or more.