| 摘要 |
<p>PURPOSE:To produce continuously and inexpensively a polarizing film or sheet having superior properties, by applying a PVA coating onto the low-temperature plasma-treated surface of a vinyl chloride resin film or sheet, stretching the film or sheet and treating the stretched film or sheet with iodine. CONSTITUTION:A vinyl chloride resin film or sheet is surface-treated with low- temperature plasma. A PVA coating is applied onto the treated surface and the film or sheet is stretched. The stretched film or sheet is treated with iodine. Said plasma treatment comprises treating the film or sheet with low-temperaure plasma of a gas having no plasma-polymerizability at a pressure of 0.001-10Torr. As the PVA, both a fully saponified PVA and a partially saponified PVA can be used, but a PVA having a saponification degree of at leat 95% is preferred.</p> |
