SEEPAGE CONTROL SHEET

PROBLEM TO BE SOLVED: To provide a seepage control sheet with secure imperviousness to water, which can be easily laid on a slope face. SOLUTION: This seepage control sheet 1 is constituted by superposing two inside continuous-fiber nonwoven fabrics 20 which are seamed together in the state of sandwiching a dispersedly-arranged superabsorbent resin 11 in between, a resin layer 30 which is made of a thermoplastic resin material and used for covering an outside surface of the inside continuous-fiber nonwoven fabric 20, and an outside continuous-fiber nonwoven fabrics 40 for covering an outside surface of the resin layer 30. The two inside continuous-fiber nonwoven fabrics 20 (20a and 20b) are seamed together by a needle punch: the resin layer 30 is bonded to the outer surface of the inside continuous-fiber nonwoven fabric 20 by heat seal; and the outside continuous-fiber nonwoven fabrics 40 is bonded to the outer surface of the resin layer 30 by heat seal. COPYRIGHT: (C)2009,JPO&INPIT