edge
After the self-adhesive label is die-cut and processed into a finished product, the backing paper is generally left wider than the label. This is to facilitate the unveiling of the label when the customer is labeling. In the process of label packaging, transportation and handling, it is easy to crack the bottom paper on the edge of the label and cause small cracks. The automatic labeling machine has a certain tension when labeling, and the label with a crack on the edge of the bottom paper is easily broken under the action of the tension, causing the label to break. In addition, improper adjustment of the rollers on the automatic labeling machine may cause the rollers to fracture the bottom paper at the edge of the label and cause the labeling to break. Generally, the labeling is broken by the roller crushing the bottom paper, and the bottom paper has regular cracks.
Fold tightly
If the finished label is rewinded too tightly, the adhesive in the self-adhesive will be squeezed out, which will cause the glue to bleed. The oozing glue will stick to the back of the backing paper and make the entire roll of labels difficult to loosen. This situation is especially obvious in summer. If the label is narrower, the tensile strength per unit area of the backing paper will not be too great. The automatic labeling machine has a certain tension during the labeling process. When a roll of labels with leaking glue is used for automatic labeling, it is likely that the backing paper from which the label is removed will be broken under the action of the tension of the labeling machine and the tension from the inside of the roll during the labeling process. Causes the labeling to break. In the labeling broken tape caused by this situation, the bottom paper breaks irregularly due to the tensile force, but the broken surfaces are relatively uniform.
Poor folding die cutting
The quality of die-cutting also has a great impact on whether it is easy to break during automatic labeling. If the die-cutting pressure is too high, the bottom paper will be cut through, which will cause the bottom paper to decrease its tensile strength and cause the label to break. The broken surface of the bottom paper of the labeling broken tape caused by poor die cutting is relatively uniform, and the crack is at the position of the die cutting line.
The fold is broken
If the release layer of the bottom paper (usually the silicone oil layer) is damaged, it will also cause the labeling to break. In the labeling broken tape caused by this situation, the broken surface of the backing paper is jagged. The damage to the release layer is caused by defects in the production and coating of raw materials. At the same time, the release layer may be scratched due to improper techniques in the process of inspection and replenishment in the printing plant.
