PURPOSE: To obtain a reflecting plate with excellent corrosion resistance whose radio wave reflecting characteristic is unchanged for a long period by forming the reflecting plate through the sequential lamination of a thermoplastic resin layer having at least excellent weather resistance, a kind of forming material selected among a metallic mat, cloth and net and a polyvinyl chloride group polymer layer including an inorganic filler.
CONSTITUTION: The thickness of the thermoplastic resin layer 3 is 5μ∼5mm, the metallic forming material is finner than 2 meshes, the thickness of the polyvinyl chloride group polymer layer including an inorganic filler is 500μ∼15mm and the content of the inorganic filler of this layer is 10∼80wt%. As a typical example of the thermoplastic resin 3, ethylene, propylene, or vinylidene fluoride is used. As a typical example of the metal 2, a metal such as aluminum, iron, nickel, copper or zinc is used. The polyvinyl chloride group polymer 1 is a vinyl chloride homopolymer and a copolymer of vinyl chloride and at most 50wt% (preferably ≤45wt%) compound having at least one double bond and capable of copolymerizing with vinyl chloride.
MACHIDA MITSUNOBU
KOBAYASHI MAKIO
YOSHIDA HIROICHI
