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Abstract
Sample preparation can greatly influence the results of laboratory testing of packaging sealant strength. Factors such as test strip width, edge uniformity, sealing die temperature and die load are recognizable variables to control. A design of experiments approach was used to explore the rank importance of these factors and any interactive effects that may occur. A generally well-behaved ethylene vinyl acetate (EVA) sealant on a high density polyethylene (HDPE) film was used for these tests. Experimental results indicate that sample width, die temperature and die pressure are the most influential factors. Unexpectedly, edge effects, namely a regular sine wave pattern and a generally random irregular edge had little influence on hot tack results. This document is ABE340, one of a series of the Agricultural and Biological Engineering Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. First published December 2002.
https://edis.ifas.ufl.edu/ae211
References
Standard Test Method for Hot Tack of Wax-Polymer Blends by the Flat Spring Test, American Society of Testing and Materials (ASTM), D 3706 - 88 (Reapproved 1993).
Standard Test Method for Seal Strength of Flexible Barrier Materials, American Society of Testing and Materials (ASTM), F 88 - 00.
The Wiley Encyclopedia of Packaging Technology, 2nd Edition, 1997, Sealing, Heat, page 823 - 827.
Hot Tack Testing: A Review, Alister M. Soutar, Journal of Plastic Film and Sheeting, Vol 12, October 1996, p304.
Hot Tack Testing: A Review, Penti Sinko and Sauli Tormala, Journal of Plastic Film and Sheeting, Vol 12, October 1996, p335.
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