Laser-weldable polyester composition, preparation and processing thereof and applications thereof

Abstract

The present invention relates to a laser-weldable polyester composition, more particular to a laser-weldable fibre-rein-forced polybutylene terephthalate composition comprising: (A) a poly butylene terephthalate resin (PBT); (B) glass fibres; and (C) an alkali metal salt of a fatty acid with 24-40 carbon atoms; wherein component (B) is present in an amount in a range of 15-100 parts by weight, relative to 100 parts by weight of component (A) and component (C) is present in an amount in a range of 1.75-4.5 parts by weight, relative to 100 parts by weight of component (A). The invention also relates to —a process for preparing the laser-weldable fibre-reinforced polyester composition, —a process for making a moulded part from the laser-weldable fibre-reinforced polyester composition, —a laser transparent moulded part made of the laser-weldable fibre-reinforced polyester composition, to —a process for laser welding the laser transparent moulded part made of the laser-weldable fibre-reinforced polyester composition on laser-light-absorbent polymeric substrate, and —a composite article comprising the moulded article made of the laser-weldable fibre-reinforced polyester composition bonded by laser welding on a laser-light-absorbent polymeric substrate.

Dependencies are inferred from the claim text.