Laser-welded article of laser-transmissible workpiece including alkaline earth metal salt of anthraquinone acidic dye
AssigneeOrient Chemical Industries, Ltd.
InventorsSyuuji Sugawara, Yoshiteru Hatase, Toshihiro Okanishi
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Abstract
A laser-welded article comprises: a laser-transmissible workpiece made from a laser-transmissible colored resin composition including at least a thermoplastic resin and an alkaline earth metal salt of an anthraquinone-type acidic dye represented by the following chemical formulae (1) and/or (2) and a laser-absorptive workpiece putting the laser-transmissible workpiece together, wherein the workpieces are welded at the put position thereof by irradiated laser towards the laser-transmissible workpiece that transmits therethrough and is absorbed into the laser-absorptive workpiece.
Claims11
A laser-welded article comprising:
- a laser-transmissible workpiece made from a laser-transmissible colored resin composition including at least an alkaline earth metal salt of an anthraquinone acidic dye and a thermoplastic resin,
- and a laser-absorptive workpiece put together with the laser-transmissible workpiece,
- wherein the workpieces are welded at a put position thereof by irradiated laser towards the laser-transmissible workpiece that transmits therethrough and is absorbed into the laser-absorptive workpiece.
A method for laser welding comprising:
- putting a laser-transmissible workpiece made from a laser-transmissible colored resin composition including an alkaline earth metal salt of an anthraquinone acidic dye and a thermoplastic resin onto a laser-absorptive workpiece,
- irradiating laser while scanning towards the laser-transmissible workpiece,
- and welding the laser-transmissible workpiece and the laser-absorptive workpiece at a put portion thereof together by the laser that transmits through the laser-transmissible workpiece and is absorbed into the laser-absorptive workpiece,
- wherein the laser furnishes an energy quantity x(J/mm) that is satisfied the following numerical expression
- 5.0≧x=(p×T)÷(100×q)≧0.4
- in the numerical expression, p(W) is output power of the laser, q(mm/sec.) is scanning speed of the laser, T is transmissivity of the laser-transmissible workpiece under wavelength of the laser.
Dependencies are inferred from the claim text.