No.3（2000）22.Influence of surface characteristics to the property of pressure sensitive adhesives

Hisashi ITO, Ichiro ENOMOTO

The correlation between properties and the surface characteristics of pressure sensitive adhesives (PSAs) composed of polystyrene-polyisoprene copolymer and cycloaliphatic resins was studied. The surface characteristics were evaluated by the critical surface tension(CST) obtained from contact angle measurement. The CST value of the surface of the PSA was peculiarly high when the ingredients of the PSA had poor miscibility. Therefore it was clarified that the surface characteristics were closely related to the miscibility which is one of the properties of PSA. Furthermore, peel strengths against various adherends which each have CST value were examined. As a result, peel strength increased with the CST value of each adherend except for special conditions.

Keywords
Pressure sensitive adhesives, Surface characteristics, Critical surface tension, Miscibility

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