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United States of America Patent
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Nov 11, 2003
Grant Date -
N/A
app pub date -
Jul 9, 2002
filing date -
Jul 9, 2002
priority date (Note) -
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Abstract
Multi-layered cards embodying the invention include a buffer layer between a PET layer and a PVC layer. The buffer layer is selected to have temperature and stress responsive properties intermediate to those of the PET and PVC layers. The buffer layer is formed of a material which has a low degree of moisture absorbance whereby the surface of the PVC layer is protected from moisture in the atmosphere. The buffer layer is also more elastic than the PVC layer.
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