January 3, 2018 - Tape & Label

How the Right PSA Can Optimize Release Liner Performance

Markets and Markets reports that the global release liners market is projected to reach $93.02 billion by 2022. Growing at a CAGR of 6.4%, release liners are used in label manufacturing for a range of applications. However, it’s important to consider the role pressure sensitive adhesives (PSA) have in determining release liner performance.

Take a look at some factors that can impact performance as well as how the right PSA can optimize it.

End-Use Performance Requirements

In order for an adhesive and release liner to function properly, the application’s end-use performance requirements must be considered. These include:

  • Temperature
  • Bond strength
  • Surface
  • Product longevity

Each item is equally important in determining the proper PSA for a release liner. This is because different PSAs offer different end-use performance capabilities. For example, an application that requires simple liner removability will need a PSA that offers low bond strength and can be easily removed.

Additionally, the material characteristics for both the PSA and release liner must align. Along with ensuring end-use functionality, this helps manufacturers meet dispensing requirements.

Adhesive and Liner Formulations 

PSA formulations typically consist of the following components:

  • Rubber elastomers
  • Tackifying resins
  • Antioxidants
  • Process oilsrelease liner

The level of each component varies based on a given formulation. Percentage changes in formulations may impact how well a PSA performs for a particular release liner application.

Additionally, the liner’s formulation may influence performance as well. For example, release liners can offer different amounts of control-release additives, which impact the release tightness.

Adhesive Coat Weight

Another variable to consider has to do with the PSA’s coat weight. Prior to coating the adhesive onto the release liner, it’s important to consider the following:

  • Desired coating thickness
  • Adhesive viscosity
  • Required coating line speed
  • Release liner material and surface characteristics
  • Type of coating needed: direct or transfer

Failure to fully assess these items can impact release liner performance and cause adhesive failure.

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