Optical patterns on drawn polyethylene by direct laser writing

Sarah S.D. Lafleur, Lihua Shen (Corresponding author), Ebeltien J.T.W. Kamphuis, Simon J.A. Houben, Luigi Balzano, John R. Severn, Albertus P.H.J. Schenning, Cees W.M. Bastiaansen (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

Optical patterns are produced on the surface of drawn linear polyethylene containing 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol (BZT), a photothermal dye, by direct laser writing. The photothermal dye absorbs the UV light and dissipates heat in the polyethylene film. This heat locally results in the melting, shrinking, and recrystallization of PE and the loss of the fibrillar crystalline morphology which is typical for these materials. By using this writing method, an optical image can be obtained by controlling the local UV irradiation dose with a pulsed UV laser. The optical image is visible with the naked eye but also between crossed polarizers giving an overt and covert authentication verification that might be interesting for anti-counterfeit applications.

Original languageEnglish
Article number1800811
Number of pages5
JournalMacromolecular Rapid Communications
Volume40
Issue number9
DOIs
Publication statusPublished - 1 May 2019

Keywords

  • drawn polyethylene
  • laser writing
  • photo-patterning
  • UV absorbers
  • Ultraviolet Rays
  • Lasers
  • Polyethylene/chemistry

Fingerprint Dive into the research topics of 'Optical patterns on drawn polyethylene by direct laser writing'. Together they form a unique fingerprint.

Cite this