Because of recent requirement for environmentally-friendly adhesive, water and/or alkali soluble pressure sensitive adhesives are being developed and produced. Our research laboratory newly developed the test method for measuring the water and alkali solubility of the adhesives. Also, we made the test method published both in KS and ISO. In this research, the test of measuring the water and/or alkali solubility of the test adhesive samples as a function of time at various temperatures was carried out using the proposed test method. The results showed this proposed test method made stable output data for the change of solubility as a function of time in the proper range of temperature.
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