| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double water barrier sheet which dispenses with the uneconomical coating of an adhesive and capable of being subjected to certain bonding and a manufacturing method therefor to enhance not only the bonding strength of the double water barrier sheet but also economical efficiency. <P>SOLUTION: For example, a plurality of strip-like auxiliary sheets 15 are melted to be bonded to one side 17a of an uneven sheet 17, which has recessed and protruded parts alternately formed to both upper and under surfaces thereof and also has the end surfaces of the protruded parts 19 of both upper and under surfaces on the spaced-apart surfaces thereof, by inserting a rod-shaped heating means 41 from the other surface 17b of the uneven sheet 17 while a first water barrier sheet 11 having both flat surfaces is melted to be bonded to the other surface 17b of the uneven sheet 17 by inserting a rod-shaped heating means 43 from one side 17a of the uneven sheet 17, and a plurality of the strip-like auxiliary sheets 15 provided on one side 17a of the uneven sheet 17 and a second water barrier sheet 13 having both flat surfaces are heated, melted and bonded. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
