Release liner for pressure sensitive adhesives

Abstract

A release liner for use with a pressure sensitive adhesive. The release liner includes a film of a thermoplastic elastomeric olefin.

1 . A method for making a release liner for use with a pressure-sensitive adhesive applied to a substrate during a heating and cooling cycle comprising: 
 (a) extruding a film comprising a selected material that exhibits thermal expansion and contraction properties similar to those exhibited by the substrate; and    (b) providing at least one release surface on the film for release of the film from the adhesive.    
   
   
       2 . The method of  claim 1  wherein the substrate comprises thermoplastic elastomeric olefin (TEO).  
   
   
       3 . The method of  claim 1  wherein the selected material comprises thermoplastic elastomeric olefin (TEO).  
   
   
       4 . The method of  claim 1  wherein the selected material comprises polyethylene.  
   
   
       5 . The method of  claim 1  wherein the material is selected by comparing the coefficients of thermal expansion and contraction of candidate materials with the coefficients of thermal expansion and contraction of the substrate.  
   
   
       6 . The method of  claim 1  wherein the release surface is provided by coating a release material onto a surface of the film.  
   
   
       7 . The method of  claim 6  wherein the release material comprises silicone.  
   
   
       8 . The method of  claim 6  wherein the release material comprises polyethylene.  
   
   
       9 . A method for using a release liner comprising: 
 (a) applying a pressure-sensitive adhesive adhered to a release liner to a substrate;    (b) heating said substrate having the pressure-sensitive adhesive and release liner adhered thereto; and    (c) cooling said substrate having the pressure-sensitive adhesive and release liner adhered thereto;    such that the release liner does not significantly buckle or substantially shrink away from the pressure-sensitive adhesive.