| 摘要 |
PROBLEM TO BE SOLVED: To obtain the above film maintaining the high transparency of the resin itself, excellent in UV rays opacity and durability and useful for green houses for agriculture, etc., by compounding a fluororesin with a substance improved in dispersibility, inhibiting the transmission of UV rays and transmitting visible light. SOLUTION: (A) A fluororesin such as ethylene-tetrafluoroethylene copolymer or hexafluoropropylene-tetrafluoroethylene copolymer is compounded with (B) a substance improved in dispersibility in the component A, inhibiting the transmission of light in an UV rays range having wavelengths of 200-330nm, and permitting the transmission of light in a visible light range having wavelengths of 400-900nm (e.g. titanium dioxide particles whose surfaces are treated with alumina, silica, zirconia, titania, a higher fatty acid, a higher fatty alcohol, an organic fluoro compound or an organic silicon compound and which has a methanol hydrophobic degree of 10-90vol.%), e.g. in an amount of 0.01-10wt.% based on the component A. The film is preferably formed in a thickness of 10-20μm.
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