| 摘要 |
PURPOSE:To produce an asphalt foam free from stickiness, and having excellent processability, by impregnating an asphalt emulsion to a foamed sheet having open cell structure, applying a plastic emulsion solution to the surface and drying the product with heat. CONSTITUTION:The objective asphalt foam can be produced by impregnating (A) an asphalt emulsion produced by stirring and dispersing 1pt.wt. of asphalt mechanically in 0.3-2pts.wt. of water using cationic or anionic surfactant, etc. in (B) a foamed sheet having a thickness of 5-30mm and having open cell structure, preferably a urethane foam sheet, optionally drying the impregnated emulsion, applying (C) a plastic emulsion solution, e.g. polyvinyl chloride emulsion, acrylic resin emulsion, etc., to the surface of the sheet preferably by a transfer roll and driving the product with heat.
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