Patent ID: 7575773
Filing Date: 2009-08-18
Classification: B05D,G02B,G02F

Abstract:
1. A thermal treating method for a dried coating layer, the coating layer formed by coating traveling web with coating liquid, comprising: blowing said dried coating layer with hot air through an air blow opening; and sucking said hot air from said dried coating layer in a position upstream or downstream from said air blow opening according to a traveling direction of said web such that, while said hot air flows on said dried coating layer in the traveling director of said web, a flow speed of said hot air remaining equal to or lower than 1 m/sec with reference to a web width direction; wherein said flow speed of said hot air in said web width direction is less than the flow speed of said hot air in said traveling direction of said web; wherein said thermal treating is used in a process of forming a liquid crystal layer in a production of an optical compensatory sheet, and said coating contains a liquid crystalline compound.