LASER MARKING METHOD

PROBLEM TO BE SOLVED: To provide a laser marking method which enables an image and/or a character to be stamped in a target molded object such as a case for a cellular phone and also in multiple color to further enhance designability. SOLUTION: In this laser marking method, a molded object is used w...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAKAMI KAZUMI, ISHIGA SHIGETO, ISHIDA YOSHIORI, SHIMIZU AKIRA, KURIMOTO HIDEYUKI, KOSAKAI TOSHIYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING COLOUR PRINTING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING LINING MACHINES MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SOLDERING OR UNSOLDERING STAMPS TRANSPORTING TYPEWRITERS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a laser marking method which enables an image and/or a character to be stamped in a target molded object such as a case for a cellular phone and also in multiple color to further enhance designability. SOLUTION: In this laser marking method, a molded object is used when an image and/or a character is stamped in a target using a laser marking device. The molded object comprises a thermoplastic resin composition for multi-color development laser marking as a target which contains at least one kind of black substance selected from the group consisting of (A) a thermoplastic polymer, (B) a chromatic colorant, (C) a carbon black, a titanium black and a black iron oxide, the contents of (B) the chromatic colorant and (C) the black substance being in a specific ratio. Further, not less than two kinds of laser lights with a varying energy are emitted to different target positions. COPYRIGHT: (C)2006,JPO&NCIPI