Polyvinyl alcohol film and polarizing film
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Abstract
The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.
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Citations
24 Claims
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1-14. -14. (canceled)
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15. A polarizing film produced by stretching a polyvinyl alcohol film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units, from 0.5 to 24 mol % of α
- -olefin units having at most 4 carbon atoms and from 1 to 30 parts by weight, based on 100 parts by weight of the vinyl alcohol polymer, of a polyhydric alcohol, and wherein the thickness of the polyvinyl alcohol film ranges from 20 to 100 μ
m. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
- -olefin units having at most 4 carbon atoms and from 1 to 30 parts by weight, based on 100 parts by weight of the vinyl alcohol polymer, of a polyhydric alcohol, and wherein the thickness of the polyvinyl alcohol film ranges from 20 to 100 μ
Specification