Why do we trim slit webs? To paraphrase the late Professor Erwin Cory, “That is a two-part question. Why? is a question that has plagued mankind since time immemorial.” Secondly, do we trim slit webs? That answer is yes.
One of the reasons we trim slit is to remove baggy web ends from certain extruded polymer materials that tend to have a disproportionate edge thickening. Other
webs may have excessive lamination or adhesive coating issues that must be removed so that we have a clean roll face on both ends and an acceptable roll shape. Also of importance is that we always want to establish an accurate full-roll width so that precision-slit individual rolls will meet required-width specifications.
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