Polyvinyl alcohol polymer film, method of producing the same and polarization film
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 12, 2004
Grant Date -
Nov 8, 2001
app pub date -
May 1, 2001
filing date -
May 2, 2000
priority date (Note) -
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Abstract
Difference in retardation between two points separated by 1 cm along the TD direction of a polyvinyl alcohol polymer film 6 is 5 nm or less. The length of a surface for drying a polyvinyl alcohol polymer film 6 is 3 m to 200 m, and the water content of the polyvinyl alcohol polymer film 6 when peeled after passing through the drying surface is 50% by weight or less, in film formation.
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