What are the requirements of automatic labeling machine for labels

When the sensor sends the signal that the label is ready to be labeled, the drive wheel on the labeling machine turns As the drum label is in tension state on the device, when the bottom paper clings to the stripper plate and changes direction, the front end of the label is forced to be separated and prepared for labeling due to the rigidity of its own material At this time, the labeling object is just at the lower part of the label Under the function of the labeling wheel, synchronous labeling is realized After labeling, the sensor under the drum label sends out a stop signal, the driving wheel is stationary, and a labeling cycle ends No matter which type of labeling machine, the labeling process is similar, but the difference is that the installation position of labeling device is different, the transportation mode, positioning mode of labeling objects are different, and the form of labeling roller is different * the hardness of the surface material label is the key to mark, so it requires certain strength and hardness of the surface material The hardness of the label is related to the thickness of the material and the area of the label Therefore, when using soft film material, it is necessary to appropriately increase its thickness, which is generally controlled above 100 μ M Thin paper materials, such as 60-70g / m2 stickers, are generally not suitable for making large labels, but suitable for processing into small labels, such as the price labels used on the marked guns The poor rigidity of the label will cause the label not to be labeled, or the label will be rewound together with the backing paper, making the automatic labeling invalid Second, the release force, also known as peel force, is the force when the label leaves the backing paper The release force is related to the type and thickness of the adhesive and the silicon coating on the surface of the base paper, as well as the ambient temperature at the time of labeling The release force is too small, and the label is easy to fall off the label (off the backing paper) during the conveying process; the release force is too large, and it is difficult for the label to leave the backing paper, so it is unable to issue the label The technical indexes should be controlled synthetically to make the parting force within a reasonable range Thirdly, the backing paper is also an important index to control the automatic labeling It is required that the surface of the backing paper should be coated with silicon evenly with the same parting force; the thickness should be uniform with good tensile strength to ensure that it will not break when labeling; the thickness should be uniform with good transparency to ensure that the sensor correctly identifies the position of the label Fourth, the processing quality requires that both sides of the base paper should be flat and free of cracks after cutting, so as to prevent the base paper from breaking when the tension changes During die-cutting, it is necessary to avoid cutting through the backing paper or damaging the silicon coating layer If the backing paper and the silicon coating layer are damaged, it is easy to break the backing paper or the adhesive in the label will penetrate into the backing paper, without marking or tearing the backing paper In addition, the static electricity in the web label should be eliminated before labeling, because the static electricity will cause the phenomenon of no labeling or inaccurate labeling Knowing the label requirements of the labeling machine, we can avoid a lot of common problems such as defective labels and warping labels.