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- 2012 (1)
Dokumenttyp
- Beitrag zu einem Tagungsband (1) (entfernen)
Sprache
- Englisch (1)
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- ja (1)
Schlagworte
Here we present a suitable tag prototype with phasesegregated
poly(ester urethane) (PEU) as base material for
effectively switching a quick response (QR) code in its surface
from non-readable to readable. In comparison with recently
introduced tags (different geometry) we minimized the
thickness from plaque (2 mm) to foil size (0.5 mm) and reduced
the lateral QR code length from 15 to 5 mm. Subsequent to
surface-dyeing by means of guest diffusion, the QR code was
laser-engraved. The implementation of thermo-mechanical
functionalization via tensile deformation and cooling resulted in
the formation of stable shapes, which exceeded the barrier of
QR code readability at an elongation of 20%. Once
functionalized, tags were switched on demand by heating. As
such the recovery of the PEU was accomplished and the QR
code could again be read out. QR code carriers based on shape
memory polymer can be used in product and brand protection
applications.