Mini Tensile Tester
Hot Tack Heatsealer
PC2 Heatsealer
Technical Papers
Technical Terms
 
Home Page

Theller Engineering                   707-762-3820

Designers of the world's most advanced hot tack machines.

 

 



TECHNICAL PAPERS

Theller has published several technical papers on heatsealing , hot tack, and testing heatsealability of materials. Since the information therein is basic to an understanding of heatsealability testing, simulation testing, and interpretation of test data, you may wish to download copies of these papers below:

  • "Heatsealability of Flexible Web Materials in Hot Bar Sealing Applications."
    (Presented at the 1988 TAPPI PLC conference, and published in Journal of Plastic Film & Sheeting, 5(1): 66(1989). This is a basic paper that reviews the mechanism of the heatsealing process and the effect of process variables on heatseal strength. It presents data on effect of serrated dies.  

  • "Testing Flexible Web Materials for Heatsealability." (Presented at the 991TAPPI PLC conference in San Diego, and at the 1992 International PLC European Seminar in Milan). The distinction is drawn between testing the heatsealability of polymer surfaces, which is independent of the thickness and construction of the sample, and testing to simulate the action of a commercial packaging machine, where any factors that affect rate of heat transfer from the dies to the seal interface also affect seal strength. These factors include sample thickness and construction. Test methods for both objectives are presented.  

  • "Measuring Hot Tack of Heatsealable Webs." (Presented at the 1994 TAPPI PLC conference in Nashville). Discusses variables in hot-tack testing, and comparison of laboratory tests with commercial performance.
  • "Measuring Hot Tack of Flexible Packaging Materials."  Describes the differences between the Theller hot tack machine and other machines.  The Theller machine is the only machine that generates the curve of seal strength vs cooling time for the hot seal, and then extrapolates the curve back to zero cooling time - the instant the jaws opened.