Abstract: A greenhouse has a daylighting member supported by a frame. The daylighting member partitions a growing space for agricultural products from an outside world, and emits light, which has entered from a light incident surface on one side, from a light emitting surface on the other side. The daylighting member has a transparent substrate layer and a transparent light emitting layer provided closer to a light emitting surface side than the substrate layer. The light emitting layer has a refractive index of 1.54 or less, water absorbability, and an equilibrium moisture content of 10% or greater at 25° C. and a relative humidity of 80%.

Abstract: The agricultural material includes a cellulose acylate layer and a polymer layer. The cellulose acylate layer is formed of cellulose acylate. The polymer layer is provided on a first CA surface, which is one surface of the cellulose acylate layer. The polymer layer has a moisture permeation resistance of at most 7.5×10?4 m2·day/g per 1 ?m of thickness and is formed of a polymer different from cellulose acylate. The agricultural material has a tear strength of at least 0.10 N.

Abstract: Objects of the present invention are to provide a film for an agricultural greenhouse that can maintain a CO2 concentration 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° C., a relative humidity of 80% and a thickness of 60 to 200 ?m.

Abstract: Objects of the present invention are to provide a film for an agricultural greenhouse that can maintain a CO2 concentration 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° C., a relative humidity of 80% and a thickness of 60 to 200 ?m.

Abstract: A packaging material for fruits and vegetables contains cellulose acylate having an acyl group. The cellulose acylate is cellulose acylate in which the hydroxy group of cellulose is esterified with a carboxylic acid, and has an acyl group. In the cellulose acylate of the packaging material for fruits and vegetable, an acyl group substitution degree, which is a rate of esterification of the hydroxy group of cellulose with a carboxylic acid, is within a range of from 2.00 to 2.97.

Abstract: Objects of the present invention are to provide a film for an agricultural greenhouse that can maintain a CO2 concentration 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° C., a relative humidity of 80% and a thickness of 60 to 200 ?m.

Abstract: 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 M2/M1 being equal to or more than 1×10?6 and equal to or less than 1×10?3, where M1 is a weight of the cellulose acylate, and M2 is 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 M3/M2 is equal to or more than 1×10?3 and equal to or less than 10, where M3 is a weight of calcium contained in the dope.

Abstract: A casting dope is cast onto a casting belt to form a casting film, and then the casting film is peeled as a wet film from the casting belt. The wet film is guided through a transfer area toward a tenter drying device. In the tenter drying device, a tenter performs sequentially the drying, the stretching and the relaxation of the wet film during transporting the wet film. On the wet film, a bowing phenomena occurs by the relaxation to generate a first disorientation of an optical axis, and therefore the orientation of slow axed becomes not uniform. The stretching provide a second disorientation of the optical axis so as to cancel the first disorientation. Thus in the obtained film, the nonuniformity of the orientation of the slow axes is reduced.

Abstract: Cellulose with a calcium (Ca) content of at most 10 ppm is used as a raw material of cellulose acylate. The cellulose acylate is synthesized by esterification of cellulose with carboxylic acid such as acetic acid. A dope containing the cellulose acylate and a solvent is continuously cast onto a belt, which is a support, to form a casting film. The casting film is peeled off from the belt as a film, and then the film is dried.

Abstract: 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 M2/M1 being equal to or more than 1×10?6 and equal to or less than 1×10?3, where M1 is a weight of the cellulose acylate, and M2 is 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 M3/M2 is equal to or more than 1×10?3 and equal to or less than 10, where M3 is a weight of calcium contained in the dope.