Fujifilm Corporation

Kimito Washiya

Akihiro Ikeyama

Shogo Katano

Yui Omi

Eiji Ishii

Objects of the present invention are to provide a film for an agricultural greenhouse that can maintain a COconcentration necessary for the photosynthesis of plants even when ventilation is not performed and to provide an agricultural greenhouse using the film. The film for an agricultural greenhouse of the present invention is a cellulose film which contains a cellulose acylate resin and has an equilibrium moisture content of 4% to 8% at a temperature of 25&#xb0; C., a relative humidity of 80% and a thickness of 60 to 200 &#x3bc;m.

Film for agricultural greenhouse and agricultural greenhouse

A cellulose acylate film producing method of producing cellulose acylate film by casting dope containing cellulose acylate and solvent is provided. The cellulose acylate film producing method includes adding a magnesium salt to the dope to satisfy a condition of a value of M/Mbeing equal to or more than 1&#xd7;10and equal to or less than 1&#xd7;10, where Mis a weight of the cellulose acylate, and Mis a weight of magnesium in the magnesium salt. If the dope contains a calcium ion, the magnesium salt suppresses creation of insoluble precipitate of a calcium salt of a fatty acid from a fatty acid ion in the dope. Preferably, the magnesium salt is magnesium sulfate. A value of M/Mis equal to or more than 1&#xd7;10and equal to or less than 10, where Mis a weight of calcium contained in the dope.

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Kanagawa, Japan

Kimito Washiya