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AssigneeBAM Bundesanstalt fuer Materialforschung und -pruefung
InventorsThorsten Pretsch, Melanie Ecker, Markus Schildhauer
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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.
A method for marking an item with a readable graphic element, the method comprising:
An item comprising a shape memory polymer, wherein at least portions of one side of the shape memory polymer have been marked with a dye paste containing as essential components a solvent, the shape memory polymer in a dissolved form, and a thermochromic pigment, either exclusively or in a mixture with another dye and at least portions of the shape memory polymer have been engraved in the same place, wherein the engraving with coloured portions of the shape memory polymer in a first state of the shape memory polymer comprises visual and/or machine readability of the marking and in a second state of the shape memory polymer does not comprise visual and/or machine readability;
A method for marking an item comprising a shape memory polymer (SMP) having a visually readable and/or machine readable graphic element on the surface, comprising:
Dependencies are inferred from the claim text.