How To Solve The Problem Of Adhesive Bleeding On The End Face Of Stickers?

When ordering hot melt adhesive material, because of the extrusion in transport, temperature changes, storage conditions, or the quality of the raw material itself can easily lead to material end seepage, if this problem is not solved in a timely manner, die-cutting will cause the row of waste paper breakage, paper edge tear or on the machine after the adhesive sticks to the machine guide roller, rules, rubber rollers, affecting the start of production.

As the material end-face glue seepage will bring harm to the equipment, if serious, it will also affect the machine operation, how should we solve it?

Let's do a test first. Put a self-adhesive label on the top of the lamp shade of the table lamp, and then tear it off, so that the part with residue will stay on the surface of the lamp shade, as shown in Figure 2(a). Select hot melt adhesive and emulsion adhesive materials were tested, the white shoe polish wiped onto the adhesive surface, left for about 20min, and then wiped with a rag, the result of the lamp shade surface label residue all wiped off, as shown in Figure 2 (b). This shows that shoe polish and stickers have a chemical reaction, that is to say, the oil in shoe polish can be dissolved with the stickers, so that the adhesive dilution, softening, cohesion is reduced. Therefore, using white shoe polish can remove the adhesive or label residue from the surface of the object.

According to this principle, we configured the grease formula according to the ratio of 80% butter and 20% machine oil, and applied it evenly on the surface of the seepage adhesive with ancient cloth. After about half an hour, the adhesive was softened and diluted, and the equipment could be turned on normally, as shown in Figure 3(b). It is worth noting that this method only softened the adhesive, the adhesive still existed objectively, so the cleaning work on the paper delivery route on the equipment should also be done.

The solution not only improves the problem of unwind sticking, but also improves the adhesion of the softened adhesive to the guide roll and baffle, which facilitates the subsequent cleaning work and can effectively avoid material breakage. Of course, the edges of the material are contaminated with grease, but they are finally removed after scrapping and slitting, which does not affect the quality of the finished label, as shown in the figure below.