Writing screen
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsTakahiro Ozu, Keizo Abe, Masayoshi Tsujii
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Abstract
A writing screen comprising a substrate and an overlayer on the surface thereof of a film comprising a vinylidene fluoride copolymer resin having a ratio of the existing amount of fluorine atoms (F) and that of carbon atoms (C), F/C, on the surface in the range of 0.6 to 1.5. The screen has excellent marker suitability and resistance to surface damage.
Claims2
A writing screen, on which writing with a marker and erasing an ink of the marker with an eraser can be carried out, comprising a substrate structure and an overlayer on the surface thereof of a film comprising a vinylidene fluoride copolymer resin having a ratio of the existing amount of fluorine atoms (F) and that of carbon atoms (C), F/C, on the surface in the range of 0.7 to 1.5, which ratio is measured by X-ray photoelectron spectroscopy, which copolymer resin consists of 95 to 70% by weight of vinylidene fluoride and 5 to 30% by weight of hexafluoropropylene, said film being produced by melt molding.
Dependencies are inferred from the claim text.