Everything You Need to Know about Adhesive Converting

Release Liners

Posted by Sue Chambers Feb 6, 2014 3:23:00 AM

As a converter of flexible materials, you often hear us talking about pressure-sensitive adhesives, foams, foils, and films. These are the core materials for parts we create, but we supply many of our finished goods on sheets or a roll. When a component is on a sheet or roll, the parts that we die-cut laminate to a release liner, but you can’t use any old liner, though. Often, the liner is one of the more critical selections. It has to have the right qualities and features to match your application. The good news is you have options.

Release Liner – A release liner is a precise delivery and dispensing system for pressure-sensitive adhesive components. There are two categoies: paper or film. Paper liners generally have four types: Densified Kraft (DK), Extended Densified Kraft (XL), Polycoated Kraft (PCK), and Extensible Polycoated Kraft (EK). Film liners generally have two types: Polyester (PET) and High-Density Polyethylene (HDPE). 

Manufacturers coat a release agent on liners to laminate and protect the adhesive it is applying to from exposure before use. The release level is the degree of separation of the adhesive from the paper or film while the liner is the paper or film carrier for the adhesive.

 Strouse die cuts this adhesive for Lexmark to for their Inkjet cartridges. Strouse die cut this adhesive for Lexmark to be used on Inkjet cartridges.

Pairing the right liner with this adhesive was crucial to the automated assembly process. This liner ensured the part would release from the liner and accurately dispense onto the cartridge.

Pairing your custom converted adhesive part with the optimal liner is crucial for many applications, including automatic assembly processes. There are many different types of release liners that are compatible with adhesives:

  • Easy, Medium, or Tight release
  • Single or Double-sided release
  • Printed
  • Medical grade
  • Extended liner for easy removal
  • Split back
  • And more

You aren’t just limited to these types of liners. Strouse often works with customers who supply their materials. If you have your type of liner that you need to use for your converted parts, we can work with that.

If you have any questions or comments about release liners, leave them in the comments section below or contact us.

Sue Chambers

Written by Sue Chambers

President and CEO of Strouse