| 摘要 |
PROBLEM TO BE SOLVED: To reliably detect the liquid leakage of acid in various environments.SOLUTION: Provided is a liquid leakage of acid detection line P composed of one pair of electrode lines 1 having a conductor 1a coated with a resin insulation layer 1b by extrusion and formed by coated with liquid absorbing layers 2, 3, 4. The resin insulation layer 1b comprises the block copolymer of a polybutylene terephthalate resin that is a crystalline resin and a polyether resin that is a non-crystalline resin. A crystalline resin has no fluidity, and a non-crystalline resin has fluidity, with an acid liquid getting into the resin and causing insulation quality to degrade. Therefore, it is possible, by their compounding ratio, to set the glass transition temperature of the block copolymer of the two to a desired value, so that, by adjusting the compounding ratio in accordance with a temperature change at a use place of this liquid leakage detection line, it is possible to obtain a liquid leakage detection line having high accuracy of liquid leakage detection that corresponds to a use place.SELECTED DRAWING: Figure 1 |
