Analysis and troubleshooting of label breaking dur

2022-08-09
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Analysis and troubleshooting of label breaking during automatic labeling

once a company used an automatic labeling machine to label, and the irregular breaking phenomenon of the label bottom paper often occurred (this phenomenon has greatly changed the production and utilization of polyurethane waterproof paint, which is usually called label breaking), which has a great impact on the production efficiency of this company

fault analysis: there are usually several reasons for this kind of fault

first, there is a crack on the edge of the label bottom paper

not low volatility and emissions within the allowable range. After the dry adhesive label is die-cut and processed into a finished product, the bottom paper is generally left wider than the label. This is to facilitate the uncovering of the label when the customer labels. In the process of label packaging, transportation and handling, it is easy to crack the bottom paper at the edge of the label, resulting in small cracks. The automatic labeling machine has a certain tension when labeling, and the label with cracks on the edge of the backing paper is easy to be broken under the action of tension, resulting in label breaking. In addition, there are also automatic labeling machines. It is imperative to explore the new development path of plastic granulator technology. The improper adjustment of the roller causes the roller to fracture the bottom paper at the edge of the label, causing the label to break. Generally, the label breaking caused by the roller crushing the backing paper, and the cracks of the backing paper are regular

second, the label rewinding is too tight, resulting in glue leakage

if the finished label rewinding is too tight, it will cause the adhesive in the self-adhesive to be extruded, resulting in glue leakage, and the exuded glue will stick to the back of the backing paper, making the whole roll of labels not easy to loosen. This is especially true in summer. If the label is narrow, the tensile strength of the backing paper per unit area will not be too large. The automatic labeling machine has a certain tension in the labeling process. When a roll of labels with glue leakage is used for automatic labeling, it is likely that the backing paper that removes the label will be pulled off under the tension of the labeling machine and the tension from the inside of the roll body, resulting in label breaking in the process of labeling from the shell manufacturing of electronic products to the inside of the product. The label broken band caused by this situation is broken by tension, so the bottom paper breaks irregularly, but the fracture surface is relatively neat

III. poor die cutting

the quality of die cutting also has a great impact on whether it is easy to break the tape during automatic labeling. If the die cutting pressure is too high, it will cause the base paper to be cut through, causing the tensile strength of the base paper to decline, resulting in label breaking. The broken label tape caused by poor die-cutting has a relatively neat fracture surface on the bottom paper, and the crack is on the die-cutting line

IV. the release layer is damaged

if the release layer of the backing paper (usually silicon oil layer) is damaged, it will also lead to label breaking. The broken band caused by this condition is serrated on the fracture surface of the backing paper. The reason for the damage of the release layer is the defects in the production and coating of raw materials. At the same time, the release layer may be scratched due to improper practices in the process of inspecting and supplementing the mark in the printing factory

solution:

solve the problem according to the above-mentioned reasons. Sometimes the failure of labeling broken belt is not caused by an isolated reason, but by the combination of the above reasons. For example, the company mentioned above is the label broken band caused by poor die cutting and too tight rewinding. (end)

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