| abstract |
A vehicle lamp containing 70-99.9 mass% of methacrylic acid ester monomer units, and 0.1-30 mass% of different vinyl monomer units that can be copolymerized with the methacrylic acid ester monomer, in which a lens molded component (1) containing a methacrylic resin composition that satisfies conditions (a) through (c) below is laser-welded to a housing molded component (2) in which a resin is used that satisfies condition (d) below. (a) Mw is 90,000-250,000; (b) the mass (MFR-1) of 3.8 kg of the methacrylic resin composition discharged in 10 minutes at 230°C, according to ISO standard 1133, is 0.2-12 g/10 minutes; (c) the MFR ratio (MFR-2)/(MFR-1) is 4.5 or more, where MFR-2 is defined as the mass of 10 kg of the methacrylic resin composition discharged in ten minutes at 230°C, according to ISO standard 1133; (d) the mass (MFR-3) of 10 kg of the resin discharged in 10 minutes at 220°C, according to ISO standard 1133, is 2-45 g/10 minutes. |