Tack adhesion is the force to separate the adhesive from the surface of another material at interface
shortly after they have been brought into contact under a load equal only to the weight of the pressuresensitive article on contact area by means of a loop tack method. In other words, it is a definition of the
‘stickiness’ of the adhesive. Too high tack adhesion may cause some problems in removing and refitting,
while too low tack adhesion may lead to bond failureduring application. Tack adhesion measurement was
modified from the ASTM D6195 [8]. The loop tack of the adhesive was determined using stainless steel
surface as substrate. The film specimen of 25 u60 mm
2
was formed loop, clamped tape, pushed down on
the substrate with specific force, and pulled off by a tensile tester and vertical jaw with separation rate of
300 mm/min dwell time.