| 摘要 |
A method for manufacturing a liner bag (10) used for lining used underground pipes, comprising steps of (i) forming a long tube of a rectangular resin absorbent sheet (1), whose outer face is hermetically coated with a plastic film (2), with a long cavity along the entire length of its seam by attaching a reinforcer cover strip (3, 4) to the inner face of the resin absorbent sheet tube across the seam by welding only the lateral long side portions thereof; (ii) fixing a reinforcer strip (5) in the long cavity by welding it to the resin absorbent sheet (1) and the reinforcer cover strip (3, 4) in a manner such that the reinforcer strip (5) is trapped between the resin absorbent sheet and the reinforcer cover strip at a location underneath the seam; (iii) and then applying a first adhesive tape (6) to the surface of the plastic film (2) in a manner such as to cover up the entire length of the seam and a wider second adhesive tape (7) to the surface of the plastic film (2) over the first adhesive tape (6), the back of the first adhesive tape (6) having a releasing characteristic with respect to the adhesive element of the second adhesive tape (7); furthermore, in the case of a double-layer bag, the inner layer (8) is pleated at two diagonal positions. <IMAGE> |
