Takanori Isozaki

TL;DR: In this paper, a polyvinyl alcohol film with an YI value of at most 20 has been proposed, which is formed of a modified polyvyl alcohol having a degree of polymerization of from 1500 to 5000, an ethylene unit content of from 1 to 4 mol % and a 1,2-glycol bond content of 1.4 mol %, giving polarizing films that contain no impurities and have good polarization performance, durability and hue stability.

TL;DR: In this article, the authors presented a water-soluble film which comprises a modified polyvinyl alcohol containing an N-vinylamide monomer unit in an amount of 1 to 10 mole percent, and a carboxyl group and a lactone group in a total amount of 0.020 to 4.0 mole percent in the molecule.

TL;DR: In this paper, a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 1.5 to 24mol % of α-olefin units having at most 4 carbon atoms was presented.

TL;DR: In this paper, a tensile force of 1,000 N/m or below is required to stretch a polyvinyl alcohol film with a thickness of 10-50 μm.

TL;DR: In this article, the problem of obtaining a polyvinyl alcohol polymer film hard to generate wrinkles at the time of stretching and to also obtain a polarizing film optimum as a wide and large-sized liquid crystal display screen reduced in color irregularity was solved.