Method for thermally printing a dye image onto a three dimensional object using a dye carrier sheet
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United States of America Patent
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Issued Date -
Jun 17, 2004
app pub date -
Dec 4, 2003
filing date -
Dec 4, 2002
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a method for thermally printing a pre-selected dye image onto a three dimensional object using an improved dye carrier sheet comprising a film substrate coated with a dye-receptive layer. The dye carrier sheet has high shrink-force, tensile strength, melt strength, and infrared (IR) absorption properties, and can conform tightly to the object. The film substrate is made from an ionomer copolymer of: i) .alpha.-olefins of the formula R--CH.dbd.CH.sub.2, wherein R is a hydrogen atom or an alkyl radical having 1 to 8 carbon atoms, ii) .alpha.,.beta.-ethylenically unsaturated carboxylic acids having 3 to 8 carbon atoms, and iii) optionally an additional monoethylenically unsaturated comonomer compound, wherein 10% to 90% of the carboxylic acid functional groups are ionized by neutralization via metallic ions distributed over the copolymer.
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