| 摘要 |
PURPOSE:To improve adhesiveness and peeling characteristic of a compound, by composing a watertight compound of a compound which consists of polyvinyl chloride, ethylene-vinyl chloride copolymer, ethylene-vinyle acetate-vinyl chloride copolymer, ethylene-vinyl chloride-glue component ternary copolymer of a mixture of these, whose bulk modulus is made most suitable. CONSTITUTION:As the base polymer of a watertight compound, polyvinyl chloride PVC, ethylene-vinyl chloride copolymer E-PVC, ethylene-vinyl acetate-vinyl chloride copolymer EVA-PVC, ethylene-vinyl chloride-glue component ternary copolymer E-PVC-C or a mixture of these, which contains indentical or same kind PVC component with a PVC insulator, is used. Thereby good adhesiveness can be obtained. And in such watertight compound, the range of its bulk modulus is to be 2X10<2>-3X10<4>kgf/cm<2>. |
