Daicel Chemical Industries, Ltd.

Daicel Corporation

Shigeyuki Takahashi

Tetsuo Ishihara

Takayuki Kuroda

Kazuhiro Yamazaki

Nagayoshi Tsukane

Manabu Uchida

Yuichi Harada

Kaoru Yamaki

Koichi Uemura

Shozo Yamamoto

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.

Process for preparing thin film having high light transmittance

A porous cellulose acetate molding containing an odoriferous substance is provided which is prepared by incorporating an odoriferous substance in a porous molding comprising cellulose acetate having a combined acetic acid of 50 to 58%, a pore volume of at least 0.65 cc/g and a collapsing strength of at least 10 kg. Said porous cellulose acetate may be one which is surface-saponified. Examples of the odoriferous substances include volatile substances such as insect repellents, antibacterials and mold inhibitors. Said porous cellulose acetate molding can adsorb the odoriferous substances fully without substantially changing its shape and persistently volatilize the substance for a long time.

Cellulose acetate molding containing odoriferous substance

A plastic film is coated with a coating solution containing a vinylidene chloride copolymer and a surface active agent and thereby provided with an excellent gas barrier property to oxygen gas and water vapor, an excellent transparency, and good printability.

Film coated with solution containing a vinylidene chloride copolymer and

A coated plastic film possessing good printability slip properties, oxygen and moisture barrier properties and transparency which comprises applying to a plastic film a coating solution of a thermoplastic resin as base resin in which a synthetic resin of a network structure having a softening temperature above 100.degree. C. and being in the form of a fine powder are added, and drying thereafter.

Coated plastic films

A polyolefin film is coated with an undercoat consisting essentially of a mixture of (a) polyvinylidene chloride or a copolymer thereof containing at least 88 percent by weight of vinylidene chloride monomer units and (b) a chlorinated polypropylene or a graft polymer thereof; at the weight ratio of a/b in the range between 99/1 and 90/10, and a topcoat consisting essentially of a vinylidene chloride copolymer containing not more than 88 percent by weight of vinylidene chloride monomer units.

Coated polyolefin film

A polyolefin film is coated with an undercoat of a mixture of (a) graft copolymer of chlorinated polypropylene to which is grafted a chlorinated vinyl monomer or a styrene monomer and (b) acrylonitrile-butadiene rubber, and a top coat of vinylidine chloride copolymer.

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Amagasaki, Japan

Shigeyuki Takahashi