Self-adhesive printing how to avoid the appearance of inferior products

In order to avoid as much as possible the self-adhesive label printing failure caused by the quality problems of the self-adhesive material itself, it is necessary to carefully check the appearance quality of the self-adhesive material before printing, so that the defects that may cause printing processing quality problems can be found in time before the self-adhesive printing.
1, check whether the self-adhesive material has rough edges

The edge of the reel self-adhesive material is clean and non-damaged, which is the basis for ensuring the printing quality of the self-adhesive label. Therefore, before printing and processing, we must carefully check whether the cutting edge of the reel self-adhesive material has rough edges, whether it is damaged due to improper storage and transportation, and roll the reel self-adhesive material down 4-5 laps to carefully check its cutting edge.

Dongguan self-adhesive printing

2, check whether there are cracks on the self-adhesive material

When the self-adhesive printing self-adhesive material is scuttled, if the scuttling tool is not adjusted properly or the blade is not sharp enough, there will be cracks on the face paper or the back paper of the self-adhesive material, and the fibers pulled out at the crack will be stuck by the adhesive. The occurrence of cracks may be continuous, it may be random, it may appear on one side of the roll self-adhesive material, it may also be on both sides, so before printing the self-adhesive material, it is not necessary to carefully check whether there are small cracks on the bottom paper and the face paper.

Then, take a sample paper that has passed the above inspection, strip it on the bottom paper and the bottom paper again to check whether there are cracks on the bottom paper and the bottom paper, because the cracks are sometimes very small and can only be found after separating the bottom paper and the face paper. It is worth noting that because the ink and adhesive will gradually accumulate on the paper guide roller of the printing press during the printing process, it will also cause cracks on the edge of the self-adhesive material. Therefore, even if printing has begun, the above problems cannot be ignored.

3. Check whether the edge of the self-adhesive material is adhered to and whether the backing paper is leaking silicon

The edge of the self-adhesive material sticks or some areas on the backing paper leak silicone oil, which will cause the face paper to break during the waste discharge during the printing process and can not be produced normally. Therefore, before printing, we must first take a section of self-adhesive material about 1 meter long, peel it off by hand, and see if the edge or other parts can not be smoothly peeled. Usually, the edge adhesion of the face paper and the bottom paper occurs on a slitting roll of the whole roll coated self-adhesive material, and generally only occurs at the outer layer of 7 meters to 10 meters, so when there is adhesion on the edge of the slitting roll self-adhesive material, do not immediately assert that the whole roll of paper has this problem.

In addition, it should be noted that the force used to peel off lightweight face paper (such as 60g/m2 and 80g/m2 face paper) is larger than that used to peel off heavy face paper, and the lighter the face paper, the tighter the feel when peeling. Also because of this, sometimes according to the shape required by the customer to die-cut the customer's choice of self-adhesive material, can not be completed at the conventional printing speed.

4. Check whether the slitting end face of the drum self-adhesive material is flat and straight, and whether the rewinding tightness is consistent

If the slitting end face of the drum self-adhesive material is uneven, it will not only affect the registration during printing, but also cause waste discharge difficulties due to changes in the 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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Self-adhesive printing how to avoid the appearance of inferior products