PURPOSE: To keep the radio wave reflecting characteristic for a long period, to eliminate exfoliation between layers and to simplify the manufacture process by laminating sequentially a high weather resistant thermoplastic resin layer, a metallic layer and an oxymethylenic polymer layer contg. an inorganic filler and specifying the thickness of each layer and the content of the inorganic filler.
CONSTITUTION: The excellent weather resistant thermoplastic resin layer 3, the metallic layer 2 and the oxymethylenic polymer layer 1 contg. the inorganic filler are laminated sequentially, the thickness of the layers 3, 2, 1 is selected respectively as 5μ∼5mm, 5μ∼1mm and 500μ∼15mm, and the content of the inorganic filler of the layer 1 is selected as 10∼80wt%. The oxymethylenic polymer used in the reflecting plate is a thermoplastic resin having a formaldehyde or trioxane as the component. As a typical example, a single polymer of formaldehyde, a trioxane homopolymer, or a copolymer between a formaldehyde and/or a trioxane and 0.1∼15wt% of a ring ether, ring acetale and/or a normal chain polyacetale is used.
MACHIDA MITSUNOBU
KOBAYASHI MIKIO
YOSHIDA HIROICHI
