| 摘要 |
PURPOSE:To produce the titled molding having excellent adhesion to various substrates, by carrying out a corona discharge treatment by spraying a gas having a specified oxygen content on a surface to be treated. CONSTITUTION:In the corona discharge treatment of a molding obtd. from a laminate formed by laminating a block copolyester on the surface of a polyester composed of a dibasic acid residue composed of at least 80mol% of terephthalic acid and a glycol residue comprising continuously feeding it to a corona discharge treatment device, a gas contg. 20vol% or less oxygen or a gas mixture thereof is sprayed on the surface of the molding to be subjected to the corona discharge treatment to such an extent that the ratio (DELTA oxygen index / DELTA nitrogen index) of the rates of the changes of oxygen index and nitrogen index in the thin layer within 100Angstrom from the surface of the molding before and after the corona discharge treatment is 1.5--3.5, and the nitrogen index in the thin layer within 100Angstrom from the outermost surface of the molding after the corona discharge treatment is 3 or above, thus producing the titled highly adhesive laminar polyester molding.
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