Method and dye mixtures for marking shape memory polymers, and shape memory polymer articles with switchable readability

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United States of America Patent

PATENT NO 9670330
APP PUB NO 20150119238A1
SERIAL NO

14354921

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Abstract

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A method for marking an item including a shape memory polymer (SMP) having a visual readable and/or machine readable graphic element on the surface of the item. The method includes pretreating the surface of the item; coloring the surface of the item with a dye solution containing an organic dye and an organic solvent; cleaning and drying the surface of the item; and engraving by at least partially ablating the surface of the item. The dyeing process is suitable for coloring the surface of a shape memory polymer (SMP), wherein the information is engraved in a form of a code or other label on the colored surface. The coloring causes an increased contrast and thus facilitates machine readability of marking and coding without affecting the other properties of the SMP.

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Patent Owner(s)

Patent OwnerAddress
BAM BUNDESANSTALT FUER MATERIALFORSCHUNG UND - PRUEFUNGUNTER DEN EICHEN 87 BERLIN 12205

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ecker, Melanie Berlin, DE 3 46
Pretsch, Thorsten Berlin, DE 3 63
Schildhauer, Markus Berlin, DE 1 46

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