| 摘要 |
<p>PROBLEM TO BE SOLVED: To manufacture a marker sheet in good productivity at a low cost. SOLUTION: This underground buried object marker sheet 10, having a base material consisting of a woven fabric 11 and a resin film 15 layered on this base material, is integrally formed with the base material and the resin film 15 thermally fused. Thermally fusing is easily and firmly generated by using a resin of mutually approximate melting point in bonding surfaces 11a, 15a of the woven fabric 11 and the resin film 15, the base material and the resin film 15 can be prevented from easily separating. As the woven fabric 11, by using a fabric obtained by weaving a three-layer structural tape formed with an outer layer consisting of resin having a melting point lower than resin forming a core layer in both surfaces of the core layer consisting of resin, or as the resin film 15, by using a film of two-layer structure layering two kinds of resin having a different melting point, a layer consisting of resin having a low melting point is provided so as to form the bonding surface 15a to the woven fabric 11, and strength can be given to the underground buried object marker sheet 10.</p> |
