Cause: Generating static electricity to foam adhesive paper
In the northern part of China, winter is often very dull. In the process of automatic labeling, the labeling machine often produces static electricity, which easily makes the sticker foam. In addition, in the labeling process, the contact and friction between the adhesive paper and the relevant parts of the labeling machine will also generate static electricity, thus forming the foaming of the adhesive paper.
1. Adhere to the temperature and humidity of the operation workshop. The temperature is generally controlled at 20-22 C and the humidity is 50%.
2. Stop Discharge with Copper Wire
Cause 2: The Cause of Label-fitted Body
The cause of foaming may also be the problem of label-fitted body itself. There are several possibilities:
1. The shape of the label body is uneven, such as flat or regular surface.
2. There are glue and impurities on the label sticker. The chemical reaction makes the sticker foam.
3. Failure to select materials according to label material
1. In the labeling process, the labeling body needs to be fixed with a conveyor belt.
2. The labeling body needs to be clean and dull before stopping labeling.
3. Choose the non-drying adhesive materials according to the label material, such as transparent glass or plastic bottles, soft bottles should choose PE, PVC film materials, hard should choose PET, BOPP; base paper should choose good lubrication, such as PET material base paper.
Reason 3: Pressure of press wheel of labeling machine is not enough
In the process of stopping automatic labeling of labeling machine, the last step is to press the roller to paste the dry adhesive paper flat on the merchandise. If the pressure is not enough, the label paper will not fit perfectly, resulting in blistering phenomenon.
Processing method: Contact labeling machine supplier to stop adjusting the machine.
Reasons 4: Uneven glue in the coating of self-adhesive paper
In the process of consuming self-adhesive paper in label printing plant, if the unevenness of glue coating can also form bubbles.
Preventive measures: When choosing non-adhesive paper, choose powerful non-adhesive printing plants, such as Yuanjinda, and choose good quality label paper.
I believe that after reading the introduction of Jinan Label Printing http://www.jindingyinshua.com, I will have my own understanding of this aspect, and other problems can be solved well in the future.