How can loop tack and quick stick properties of SIS (styrene-isoprene-styrene)-based pressure-sensitive adhesives (PSAs) be improved?
Loop tack and quick stick properties tend to follow similar trends in that too little or too much tackifier can reduce these properties. Although higher softening point resins such as Eastotac™ H-115R or Eastotac™ H-130R can improve SAFT, shear and probe tack properties, they can also reduce quick stick and loop tack. Optimum resin concentration will depend on the desired balance in properties as well as the type and amount of assisting components, but around a 1/1 to 1.2/1 ratio of a low softening point resin such as Eastotac™ H-100R to polymer with perhaps 3-12% plasticizing oil is a good starting point with SIS polymer.
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