| 摘要 |
PROBLEM TO BE SOLVED: To provide an agricultural multilayered film which cuts off ultraviolet rays of a wavelength region wide enough to expect an ultraviolet barrier effect and causes no lowering of long-term ultraviolet absorbability. SOLUTION: The agricultural multilayered film contains a triazine type ultraviolet absorber, a benzotriazole type ultraviolet absorber and an inorganic filler. Further, the ultraviolet absorbers are added so as to satisfy X>Y and X>Z, wherein X represents the ultraviolet absorber content X per unit volume in an intermediate layer, Y represents the ultraviolet absorber content per unit volume in an inner layer and Z represents the ultraviolet absorber content Z per unit volume in an outer layer. COPYRIGHT: (C)2004,JPO&NCIPI
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