wetness indicator glue

Wetness indicator glueare produced by the organic combination of hot melt adhesives and substances that are color-sensitive to pH. The urine gel is coated on the side of the bottom film facing the core layer in the form of lines. When the urine wets the core layer, it is conducted to the surface of the urine gel, causing the pH value to change, resulting in a change in color and achieving a urine-based display. Visual monitoring function.