| 摘要 |
PROBLEM TO BE SOLVED: To prevent a failure from being generated when the adjacent capping sheets are thermally melt-stuck to each other. SOLUTION: The capping sheet 6 is used at installation sites such as a waste disposal site and is produced by arranging protective layers 7, 7, each of which consists of a nonwoven fabric comprising a core-sheath conjugate fiber having a core component and a sheath component having the melting point lower than that of the core component, on both sides of a microporous film 8 having air permeability and water barrier properties. The method for laying the capping sheet comprises the steps of: laying a plurality of capping sheets 6; and melting the sheath component of the core-sheath conjugate fiber to thermally melt-stick the adjacent capping sheets 6, 6 to each other. COPYRIGHT: (C)2009,JPO&INPIT
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