Marked article and method of making the same

US7459259B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• David B. Engel · Clifton Park, US
• David Gilles Gascoyne · Schenectady, US
• Vandita Pai-Paranjape · Evansville, US
• Radislav Alexandrovich Potyrailo · Niskayuna, US
• Philippe Schottland · Sparta, US
• Micah Sze · Albany, US
• Marc Brian Wisnudel · Clifton Park, US

Key dates

• Filing date: Sep 29, 2004
• Grant date: Dec 2, 2008
• Expiry date: Oct 15, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method of marking a thermoplastic article can comprise: combining a thermoplastic with a light-marking additive to form a composition, forming the composition into an article having a maximum optical absorption wavelength; and illuminating, at a marking wavelength, at least a portion of the article with a device having a power of less than or equal to about 200 mW, to form a light-mark. The light-mark can have a size, as measured along a major axis, of greater than or equal to about 10 micrometers. The light-mark can also have a mark absorption wavelength that is greater than or equal to about ±100 nm of the maximum optical absorption wavelength, and can have a spectral absorption curve.