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How to check the quality of double-sided pvc packaging tape?

by:Kint      2020-02-24
How to check the quality of double-sided pvc packaging tape: 1. Check whether there are cracks on the double-sided tape. If the slitting tool is not properly adjusted or the blade is not sharp enough during slitting, cracks will appear on the face paper or bottom paper of the double-sided adhesive tape, and the fibers pulled out of the cracks will be stuck by the adhesive. The occurrence of cracks may be continuous or random, and may occur on one side of the double-sided adhesive tape of the reel or on both sides. Therefore, before machining the double-sided adhesive tape, be sure to carefully check whether there are small cracks on the backing paper and the surface paper. 2. Check whether the double-sided adhesive tape has burrs, rolls and smooth edges of the double-sided adhesive tape without damage, which is the basis for ensuring the quality of the double-sided adhesive tape. Therefore, before processing, be sure to carefully check whether there are burrs on the cutting edge of the double-sided tape of the reel, whether it is damaged due to improper storage and transportation, and roll the double-sided tape of the reel 4-5 laps, carefully check its cutting edge. 3. Check whether the edge of the double-sided adhesive tape is adhered, whether the backing paper is coated with silicon or whether some areas of the backing paper are coated with silicone oil, which will cause the surface paper to break during waste discharge during processing, can not be produced normally. Therefore, before processing, take a piece of self-adhesive material about long and peel it off by hand to see if there are any parts that cannot be smoothly and uniformly peeled off on the edge or other parts. In general, the adhesion of the edges of the facial tissue and the backing paper occurs on a slitting roll of the self-adhesive material coated on the whole roll, and generally only occurs on the outer layer 7 M ~ At, therefore, there is adhesion on the edge of the double-sided adhesive tape of the slitted roll. Do not immediately assert that the whole roll of paper has this problem. 4. Check whether the slitting end face of the double-sided tape of the reel is straight and whether the tightness of the rewinding is consistent. If the slitting end face of the double-sided tape of the reel is uneven, it will not only affect the setting during processing, moreover, it will be difficult to discharge waste due to the change of die cutting position; Inconsistent tightness during rewinding will cause changes in paper tension during printing, and uneven tension will also cause printing quality problems.
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