Daicel Chemical Industries, Ltd.

Kaoru Yamaki

Takayuki Kuroda

Shigeyuki Takahashi

Etsuo Ohtake

A process for producing a thin film of unoriented cellulose ester held under uniform tension, the process including the steps of: casting a solution of cellulose ester in an organic solvent over a smooth glass plate and thereafter removing the solvent to form a thin film of a uniform thickness on the glass plate; permitting the thin film to separate from the glass plate by immersing the same into water; and recovering the thin film from the water and setting the wet film on a supporting mount, followed by drying the same.

Process for producing a thin resin film

A thin coated film having a transmittance of 96% or more for light having a particular wavelength in a range of 300 to 700 nm is prepared by coating one or both surfaces of a thin film of a transparent resin having a uniform thickness of 0.5 to 10 .mu.m with a colorless metal fluoride or oxide all over the area thereof with a thickness of about 100 nm while holding the thin film in a uniformly tensional state.

Growing community of inventors

Himeji, Japan

Kaoru Yamaki