How can elevated temperature shear properties of a natural-rubber based pressure-sensitive adhesive be improved?
The use of higher softening point resins has been shown to greatly improve the shear adhesion failure temperature (SAFT) as well as both room temperature and 50°C holding power of natural rubber based pressure sensitive adhesives (PSAs), although some tack properties such as rolling ball tack may decrease when using higher melting point tackifying resins. The exact improvement will depend on the specific formulation and testing conditions, but as much as 10°C improved SAFT and 5 times the room temperature and 50°C shear was found to result in lab work using a 1.2/1 ratio of tackifier to natural rubber polymer with 10% plasticizing oil when Eastotac™ H-130E was substituted for Eastotac™ H-100E resin.
Related Questions
- 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)?
- Can rolling-ball tack properties of SIS (styrene-isoprene-styrene) based pressure-sensitive adhesives be improved by increasing the tackifier concentration?
- How can elevated temperature shear properties of a natural-rubber based pressure-sensitive adhesive be improved?
