It was found that the sevral emulsifiers effect into removability of emulsion type PSA. For the purpose of removable PSA,variety of rubbers were widely used. Recently,they are replaced by acrylic emulsion type PSA.because of its characteristic for weather-ability and aging resistance. We have put a new product of removable emulsion type PSA into the market in Japen. The effect of various type of emulsifiers which was added into the system during and after the co-polymerization on the adhesion was studied .
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