Pressure-sensitive adhesive fundamentals

Pressure-sensitive adhesives (PSA) are capable  of holding materials together by instantaneous low-pressure surface contact. Most commonly, a PSA is based on selected elastomers modified to enhance tackifying and wetting properties.

These products require no activation by water, solvent or heat to exert a strong holding force on varied materials that include paper, plastic, wood, cement and metal. They have enough cohesive holding power and elasticity so they can be handled and removed from surfaces without leaving a residue.

  • Hot-melt PSA (HMPSA) – applied as a 100% solids, thermoplastic composition in the molten state
  • Water-based PSA (WBPSA) – applied in aqueous emulsion form and dried to form the adhesive film
  • Solvent-based PSA (SBPSA) – – applied in solvent solution form and dried to form the adhesive film
  • Calendered PSA – applied as a 100% solids composition in a calendering operation