| 摘要 |
PURPOSE:To obtain an agricultural covering material which is excellent in weathering resistance, mechanical strength, flexibility and light transmittance and is freed of a problem of the deposition and growth of moss even after a long-term extension, by molding a fluorocarbon resin into a film. CONSTITUTION:A fluorocarbon resin of a fluorine content >=45wt.% such as an ethylene/tetrafluoroethylene copolymer having an ethylene to tetrafluoroethylene molar ratio of 40/60-60/40 and a content of perfluoroalkylvinyl monomer of the formula (wherein x is 2-10) of 0.1-10mol.% is optionally mixed with a colorant (e.g., TiO2), a nondripping agent, etc. and extrusion-molded into a film to obtain an agricultural covering material comprising a fluorocarbon resin film of a thickness of 10-300mu. |
