Solutions and methods to common problems of double sided adhesive die-cutting processing

Double-sided adhesive tape is a roll-shaped adhesive tape made of paper, cloth, and plastic film as the base material, and then uniformly coated with elastomer-type pressure-sensitive adhesive or resin-type pressure-sensitive adhesive on the above-mentioned base material. Adhesive, release paper (membrane) consists of three parts.

Problems and solutions when double-sided adhesive tape is die-cut

The problems that often occur in double-sided adhesive die-cutting are: the cutting edge of the double-sided tape is not bright or fuzzy. The reason for these problems is that the adhesive strip on the double-sided adhesive die-cutting plate There is a certain tension on the tape, and the double-sided tape is broken by the tension when it is not completely cut through, showing a burr.

To deal with the problem of fluffing on the cutting edge of the double-sided tape, first of all, different types of die-cutters should be selected according to the different tapes. The texture and height of the blade are different, which is directly related to the quality of double-sided adhesive die-cutting and the service life of the die-cutting knife.

In preventing double-sided tape from fluffing, it is better to use a straight-grained knife than a horizontal-grained knife. Pay attention to the following three points:

1. The double-sided adhesive tape is first bonded to the attached frame and reinforcing ribs. During operation, do not touch the double-sided adhesive tape and the cleaned surface with hands or other objects after tearing off the film.

2. Use isopropanol/water mixture (1:1) or xylene to clean the joints of composite panels, attached frames, reinforcing ribs and double-sided adhesive tape.

3. Put the attached frame with double-sided adhesive stickers into the composite board box, lightly tap the attached frame with your hands or a rubber hammer, so that the bent edge of the composite board enters the hook groove of the attached frame, so that the double-sided adhesive sticks to the composite board The knot is firm, and the gap between the folded seams of the composite board is as small as 0.4mm.

Precautions when double-sided tape is cut

When the double-sided tape is cut, if the cutting tool is not adjusted properly or the blade is not sharp enough, cracks will appear on the top paper or bottom paper of the double-sided tape, and the fibers pulled out from the cracks will be stuck by the adhesive. The occurrence of cracks may be continuous or random, and may appear on one side of the reel of double-sided tape, or on both sides. Therefore, before the double-sided tape is machined, it is necessary to carefully check its backing paper and surface. Check whether there are small cracks on the paper, and then take a piece of sample paper that has passed the above inspection, peel off the backing paper and check whether there are any cracks on the bottom paper and the backing paper again, because the cracks are sometimes very small, and only after separating the backing paper and the top paper to find out.

Check double-sided tape die-cutting for rough edges

The edge of the reel double-sided tape is smooth and undamaged, which is the basis for ensuring the quality of the double-sided tape. Therefore, before processing, it is necessary to carefully check whether the cutting edge of the reel double-sided tape has burrs, and whether it has been damaged due to improper storage and transportation. , and roll down the reel of double-sided tape 4-5 times, carefully check the cutting edge.

Check whether the edge of the double-sided tape sticks and whether the backing paper leaks silicon

If the edge of the double-sided tape sticks or part of the backing paper misses the coating of silicone oil, it will cause the surface paper to break during waste discharge during the processing process, and normal production will not be possible. Therefore, before processing, take a piece of self-adhesive material about 1 meter long and peel it off by hand to see if there are any parts on the edge or other parts that cannot be peeled off smoothly and consistently. Usually, the edge adhesion of the surface paper and the 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. Therefore, when encountering a slit roll The edge of the double-sided tape is sticking, don't immediately assert that the whole roll of paper has this problem.

In addition, it should be noted that the force used to peel off light-weight facial tissue (such as 60g/m2 and 80g/m2 facial tissue) is greater than that of heavy-weight facial tissue. The lighter the facial tissue, the tighter the feel when peeling off. Because of this, sometimes the double-sided tape selected by the customer cannot be finished at the conventional processing speed when the die-cutting is performed according to the shape required by the customer.

Today, the problems and solutions encountered in the die-cutting process of double-sided adhesive tape are sorted out here. Of course, there are still many knowledge points to know about double-sided adhesive tape in terms of types and characteristics.