| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube lining material that prevents such a possibility that thickness in a joint after the completion of its hardening might become thickened as far as 30% more than that of other parts, and simultaneously makes its sufficient strength securable in deterring any opening of the joint of a tubular resin adsorbent material constituting at least a surface layer and an internal layer. SOLUTION: In a tube lining material 1, having a multilayer structure comprising a surface layer 2 consisting of a tubular resin adsorbent material 2a whose outer surface is coated with a plastic film 5 being high in airtightness, and an internal layer 4 consisting of another tubular resin adsorbent material to be arranged inward this surface layer 2, and being composed of having hardenable resin impregnated into the tubular resin adsorbent material 2a constituting both these layers 2 and 4, a butt joint (a) reinforced by a resin adsorption ribbon tape (reinforcer) 6 is formed in the tubular resin adsorbent material 2a of the surface layer 2, and then a superposed joint (c) whose increment to thickness in another part of thickness after the completion of hardening becomes less than 30%, is formed in the tubular resin adsorbent material of the internal layer 4. |
