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, which is done to facilitate the unveiling of the label when the customer applies the label. During the transportation and handling of label packaging, it is easy to crack the bottom paper on the edge of the label to form 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 easy to be pulled off under the action of tension, resulting in a labeling breakage. In addition, there are cases where the roller adjustment on the automatic labeling machine is not suitable, resulting in the roller fracturing the backing paper on the edge of the label, resulting in labeling breakage. Generally, the labeling belt is broken caused by the roller crushing the backing paper, and the cracks of the backing paper are relatively regular.
Tight
If the finished label is rewound too tightly, the adhesive in the self-adhesive will be extruded, resulting in glue seepage, and the glue will stick to the back of the backing paper, making the whole roll of labels difficult to loosen. This is especially true during the summer months. If the label is narrower, the tensile strength per unit area of the backing paper will not be too large. The automatic labeling machine has a certain tension in the labeling process. When a roll of labels with glue seepage phenomenon is used for automatic labeling, it is likely that the liner that removes the label will be pulled off under the action of the tension of the labeling machine and the tension from the inside of the roll body during the labeling process, resulting in a labeling breakage. The labeling break caused by this situation, because it is tensile pull-off, the bottom paper breaks irregularly, but the fracture surface is relatively uniform.
Poor die-cutting
The quality of die-cutting also has a great impact on whether the tape is easy to break during automatic labeling, if the die-cutting pressure is too large, the backing paper is cut through, causing the tensile strength of the backing paper to decrease, resulting in labeling breakage. The fracture surface of the labeling broken tape liner caused by poor die-cutting is relatively uniform, and the crack is at the position of the die-cut line.
Destroyed
If the release layer of the backing paper (usually the silicone layer) is broken, it can also lead to labeling breakage. This situation causes a labeling breakage, and the fracture surface of the backing paper is jagged. The causes of the failure of the release layer are defects in the production and coating of raw materials, and the abrasion of the release layer may also be caused by improper techniques in the process of inspection and labeling in the printing plant.
