What are some ways to improve the shear adhesion failure temperature (SAFT) and shear properties of SIS (styrene-isoprene-styrene)-based pressure-sensitive adhesives (PSAs)?
Shear properties of SIS-based PSAs can be improved by using higher melting point tackifiers (Eastotac™ H-130R or Eastotac™ H-115R vs. Eastotac™ H-100R, for example), by increasing the amount of polymer in the formulation and/or by reducing the concentration of plasticizing oil. The percentage tackifier is generally not as important as its softening point.
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