| abstract |
The present invention relates to a pH reactive coating agent for detecting leakage, comprising a water-soluble polymer, microparticles, fibers, a solvent and a pH indicator, characterized in that when drying, to form a peel-off type polymer membrane. According to the present invention, since the pH-reactive coating agent can be easily removed by the peel-off method after the leak test, the time and effort required for the leak test can be significantly reduced. In addition, since the pH-reactive coating agent of the present invention includes porous fibers or hollow fibers, the tensile strength of the polymer membrane formed during drying is increased to further facilitate the removal of the polymer membrane by the peel-off method, and the inside of the polymer membrane. The sensitivity of the leak test can be improved by increasing the rate at which the ammonia gas is diffused. |