| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightproof agricultural polyolefin-based resin film excellent in light reflectance at the inner surface, a film strength and durability and having 5-layer structure. SOLUTION: This lightproof agricultural polyolefin-based resin film used for coating agricultural facilities or the like has the 5-layer structure in order of a transparent resin layer comprising linear low-density polyethylene resin as a main component, a white resin layer prepared by compounding a titanium dioxide pigment to the resin component comprising the linear low-density polyethylene resin as the main component, a gray resin layer prepared by compounding the titanium dioxide pigment and a carbon black pigment to the resin component comprising the linear low-density polyethylene resin as the main component, a white resin layer prepared by compounding the titanium dioxide pigment to a resin component composed of a polyolefin-based resin containing 5-28 wt.% of vinyl acetate and a transparent resin layer composed of a polyolefin- based resin containing 3-15 wt.% of vinyl acetate described from the outside layer and has the whole film thickness within the range of 75-160 μm and >=99.9% light-shielding ratio. |
