Laser marking and shading enhanced PBT composition and preparation method and use thereof

Abstract

Provided is a laser marking shading enhanced PBT composition, comprising, in parts by weight, the following components: 50-80 parts of a PBT resin, 6-20 parts of an opacifying agent, 15-30 parts of fiberglass, 0.1-0.5 parts of an antioxidant, and carbon black accounting for 0.0033-0.033% of the weight of the opacifying agent. In the present invention, when performing compounding with only an opacifying agent and a trace amount of carbon black without the use of an expensive laser marking agent, the composition has the properties of a whiteness value of more than 90, a shading of less than 3 mm, and a color difference value of more than 15 before and after laser marking. Therefore, the composition can be applied in the field of preparing lamp cup housings, capacitors, connectors, or relay articles in the lighting industry.

Dependencies are inferred from the claim text.