Abstract
Sample preparation can greatly influence the results of laboratory testing of packaging sealant materials. Factors such as test strip width, edge uniformity, sealing die temperature, and die pressure were considered as variables to be considered in the measurement of hot tack. A design of experiment approach was used to explore the rank importance of these factors and any interactive effects that may occur. A commercially used structure – ethylene vinyl acetate (EVA) sealant on a high density polyethylene (HDPE) film – was used for these tests. Experimental results indicated that sample width, die temperature, and die pressure were the most influential factors. Edge effects, namely a regular sine wave pattern and a random irregular edge had little influence on hot tack results and there were no significant interactive effects noted.
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