Film for agricultural greenhouse and agricultural greenhouse

Abstract

Objects of the present invention are to provide a film for an agricultural greenhouse that can maintain a CO 2 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 μm.

What is claimed is: 
     
         1 . An agricultural greenhouse comprising:
 a covering film which forms a space walled off from the outside,   a lining film which is provided on the inside of the covering film such that an interspace is formed between the covering film and the lining film, and   a ventilation means for exchanging at least a portion of the air existing in the interspace with the external air,   wherein at least a portion of the lining film is constituted with a cellulose film which contains a cellulose acylate resin and has a water vapor permeability equal to or higher than 600 g/m 2 /24 h.   
     
     
         2 . The agricultural greenhouse according to  claim 1 ,
 wherein at least a portion of the covering film includes the ventilation means, and   the ventilation means is a film having a water vapor permeability equal to or higher than 500 g/m 2 /24 h.   
     
     
         3 . The agricultural greenhouse according to  claim 2 ,
 wherein the ventilation means is the cellulose film which contains a cellulose acylate resin and has a water vapor permeability equal to or higher than 600 g/m 2 /24 h.   
     
     
         4 . The agricultural greenhouse according to  claim 1 ,
 wherein a roof portion of the lining film is constituted with the cellulose film.   
     
     
         5 . The agricultural greenhouse according to  claim 2 ,
 wherein a roof portion of the lining film is constituted with the cellulose film.   
     
     
         6 . The agricultural greenhouse according to  claim 3 ,
 wherein a roof portion of the lining film is constituted with the cellulose film.