Analysis of the causes of label breakage of the labeling machine-industry news
by：Zhongya Packaging 2022-05-26
After the labeling machine's edge-adhesive labels are die-cut into finished products, the backing paper is generally left wider than the label. This is done 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. automatic labeling machine has a certain amount of tension during labeling, and labels with cracks on the edge of the bottom paper are easy to be pulled under the action of tension and cause the labeling 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 breaks caused by the roller crushing the bottom paper, and the bottom paper has regular cracks. If the finished label is rewinded too tightly, the adhesive in the self-adhesive will be squeezed out, which will cause the glue to ooze. 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 u200bu200bthe 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 very 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. 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 and the bottom paper's tensile strength will decrease, which will cause the labeling 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. If the release layer of the backing 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.