3m Innovative Properties Company

Junkang Jacob Lui

Jeffrey O Emslander

Pingfan Peter Wu

Robert L W Smithson

Kanta Kumar

Panu K Zoller

Rachel M Lucking

A process to mark a multilayered article with a laser (). The multilayered article () includes a laser-markable layer () having at least one organic polymer and at least one light-sensitive pigment therein, and including at least one release agent associated with the laser-markable layer. Laser-marking of the laser-markable layer is accomplished by directing laser radiation () into the multilayered article through the release agent () to induce an interaction between the light-sensitive pigment and the organic polymer. As a result of the interaction, a visually perceptible marking () is formed in the article. The laser-marked article includes a laser-markable layer and a first release agent associated with a surface of the laser-markable layer. The marking(s) in the laser-markable layer is visible through the layer of release agent, and the marking is a result of the laser-induced interaction between the light-sensitive pigment and the organic polymer.

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Woodbury, MN, United States of America

Junkang Jacob Lui