The processing quality requires that both sides of the bottom paper be smooth and free of breaks after slitting, so as to avoid the bottom paper from breaking when the tension changes. When die-cutting, avoid cutting through the bottom paper or destroying the silicon-coated layer. If the bottom paper and silicon-coated layer are damaged, the bottom paper may be broken or the adhesive in the label will penetrate into the bottom paper. . In addition, it is necessary to eliminate the static electricity in the roll paper label before labeling, because static electricity will cause the labeling to be inaccurate or inaccurate when labeling.
The bottom paper is also an important indicator for controlling automatic labeling. The surface of the bottom paper is required to be coated with silicon uniformly, with consistent release force; uniform thickness, good tensile strength, to ensure that the label does not break; uniform thickness, good light transmission, to ensure that the sensor correctly recognizes the position of the label.
A perfect visual effect should be achieved in labeling. One of them is to avoid the phenomenon of label warping in labeling. Label the tube before it is filled, and then fill and seal the tube after it is labeled. The heating during the sealing process is particularly severe for the label. The closer the label is to the bottom, the greater the possibility of label warping.