After the winter series, what about the convexity and softness?
Plastic bag labeling case
In the winter, a northern chemical plant is labelled on the plastic bag of washing powder. The environmental temperature of the labeling is above 12 °C. After labeling, the product is immediately pulled into the open warehouse for storage. The temperature of the warehouse is below zero. When the product was shipped out, the label was found to be seriously curled or peeled off.
Solution: Change the product indoors (at around 12 °C at room temperature) and store it in the open warehouse after one day. The problem disappears.
Analysis of the cause: The crux of the problem is that it does not provide sufficient conditions to ensure the viscosity after labeling. The labeling process of the self-adhesive label is divided into two stages, that is, the label is initially combined with the surface of the object under the action of pressure; and the glue which is pre-coated on the self-adhesive material flows slowly and fully bonds with the surface of the substrate to be attached. Play the best stickiness. The lower the ambient temperature, the slower the glue flows and the more the glue exerts its optimum viscosity.
Experiments have shown that the glue usually takes 24 hours to achieve the best adhesion after labeling. Therefore, after labeling, the labeled container or product should be placed in the labeling environment or the environment that meets the labeling temperature for at least 24 hours. Do not place the container or product that has just been labeled in a temperature-constrained environment. Otherwise, the viscosity of the glue will be affected.
Sun Cup: Flexo Lines-Shanghai Guoma Trademark Labeling System Co., Ltd.
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