| 摘要 |
PURPOSE:To ensure uniformity of color and contrive higher printing performance, by applying a coating agent comprising a polyester resin, a hydrophobic fine powder and an antistatic agent to the printing surface side of a transparent base, and laminating the base with a back sheet on the other side. CONSTITUTION:As a polyester resin, a thermoplastic high molecular weight saturated polyester resin having a molecular weight of 5,000-500,000 is used. As a hydrophobic fine powder, a powder of an inorganic substance such as silica, clay and quartz treated to be hydrophobic and not adversely affecting the transparency or surface roughness is used. As an antistatic agent, a conductive agent such as a cationic polymer and a fine metallic powder is used. The fine metallic powder is a fine powder of a metal, e.g., Fe, Cu, Zn or Al which does not affect transparency and which can be ground to about 1-0.01mum. The conductive agent is incorporated in a coating agent so that the surface resistance of the OHP sheet obtained is, for example, 10<7>-10<12>OMEGA at a temperature of 20 deg.C and a humidity of 65%. The back sheet is preferably a synthetic paper or a plastic sheet. |
