Lg Chem, Ltd

Joong Suk Nah

Eung Jin Jang

Kyu Hwang Lee

Ho Kyung Lee

Chang Song Lee

Disclosed herein is an apparatus for preparation of a film exhibiting polarizing properties by dyeing a substrate film with iodine and then orienting the same through a continuous process, comprising a first bath equipped with a thermometer to measure a temperature of the first bath; a second bath equipped with a thermometer to measure a temperature of the second bath and a densitometer to measure a concentration of the second bath; a third bath in which the iodine-dyed PVA film is stretched by a drawing roller; an oven equipped with a thermometer to measure a temperature of the oven; and a central controller that predicts a transmittance of the polarizing film, and then, controls the temperatures of the first and second baths and the oven and an amount of a composition fed to the second bath.

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Chungcheongbuk-do, South Korea

Joong Suk Nah