| 摘要 |
PURPOSE:To reduce consumption of beating energy and to speed up paper making greatly by incorporating aluminum sulfate and carboxyl-modified anionic PVA in paper to be used for the titled original. CONSTITUTION:Aluminum sulfate and a carboxyl-modified anionic PVA are contained to form a highly chemically combined film between both and to prevent infiltration of a PPC toner correction liquid very effectively. Said PVA is an anion type PVA having carboxylic groups introduced by acid modification, and a part of carboxylic groups forms lactone groups. As aluminum sulfate, aluminum sulfate, alum on the market, or aluminum potassium sulfate, etc. are usable. |
