Patent ID: 6420440
Filing Date: 2002-07-16
Classification: G02F

Abstract:
A method for recycling an alignment layer material, comprising steps of:collecting a waste solution of alignment layer material using a transferring pipe and raw material container equipped with an apparatus that prevents air from contacting the waste solution of the alignment layer material and with a cooling apparatus that cools the waste solution of the alignment layer material; solidifying polyamic acids and soluble polyimides by putting the collected waste solution of the alignment layer material into an organic solvent or ultra purified water in which the alignment layer materials of polyamic acids and soluble polyimides are insoluble; separating polyamic acids and soluble polyimides solidified from the organic solvent or ultra purified water, washing and drying the separated polyamic acids and soluble polyimides; and dissolving the washed and dried polyamic acids and soluble polyimides into a mixed solvent of the same composition as what is used for the original solution of the alignment layer material, wherein the waste solution of the alignment layer material is collected at a temperature of below 5Â° C., wherein the organic solvent or the ultra purified water is consumed equal to or more than 130 wt parts per 100 wt parts of the waste solution of the alignment layer material.