How to check the quality of double-sided tape?

by:CROWN     2022-01-26

1. Check whether the edges of the double-sided tape adhere and whether the backing paper is missing silicone coating: The edges of the double-sided tape are adhering or some areas of the backing paper are leaking with silicone oil, which will cause the surface paper to break during waste discharge during processing. cannot be produced normally. 1. Check whether the edges of the double-sided tape adhere and whether the backing paper is missing silicon coating:

The edges of the double-sided tape are stuck or some areas of the backing paper are leaked with silicone oil, which will cause the surface paper to break when the waste is discharged during the processing process and cannot be produced normally.

So, before processing, take a piece of self-adhesive material about 1 meter long, peel it off by hand, and see if there is any part that cannot be peeled off smoothly and uniformly on the edge or other parts.

Usually, edge sticking of top and bottom paper occurs on a slit roll of the whole roll of coated self-adhesive material, and generally only occurs at the outer layer of 7 meters to 10 meters.

So, if the edge of the slitted double-sided tape is stuck, don't immediately assert that the whole roll has this problem.

In addition, it should be noted that the peeling force of lightweight tissue paper (such as 60g/m2 and 80g/m2 tissue paper) is greater than that of heavy-weight tissue paper. The lighter the tissue paper, the tighter the hand when peeling off.

Because of this, sometimes when the double-sided tape selected by the customer is die-cut according to the shape required by the customer, it cannot be completed at the conventional processing speed.

2. Check the double-sided tape for burrs:

The edge of the double-sided tape on the roll is smooth and without damage, which is the basis for ensuring the quality of the double-sided tape.

Therefore, before processing, be sure to carefully check whether the slitting edge of the double-sided tape on the roll has burrs, whether it is damaged due to improper storage and transportation, and roll the double-sided tape on the roll for 4-5 turns, carefully Check its slitting edges.

Next to the inspection method for the appearance of double-sided tape we mentioned above, today we will add some knowledge about this aspect.

3. Check the double-sided tape for cracks:

During the slitting of double-sided tape, if the slitting knife is not adjusted properly or the blade is not sharp enough, cracks will appear on the top or bottom paper of the double-sided tape, and the fibers pulled out from the cracks will be blocked by the adhesive. stick to.

The occurrence of cracks may be continuous or random and may appear on one side of the roll of double-sided tape or on both sides. Therefore, before machining the double-sided tape, be sure to check the bottom of the double-sided tape carefully. Whether there are small cracks on the paper and tissue paper.

Then, take a piece of sample paper that has been inspected above, peel off the backing paper and check again whether there are cracks on the bottom paper and bottom paper, because the cracks are sometimes very small, and can only be found after separating the bottom paper and the top paper.

4. Check whether the slitting end face of the roll double-sided tape is straight. Whether the rewinding tension is consistent:

If the slitting end face of the roll double-sided tape is uneven, it will not only affect the registration during processing but also cause waste disposal difficulties due to the change of the die-cutting position; the inconsistent tension during rewinding will cause paper during printing. Changes in force and uneven tension can also cause printing quality problems.

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