What is the impact of low temperature environment on the viscosity of self-adhesive label paper

Low temperature environment will have a significant impact on the viscosity of self-adhesive label paper, mainly in the following aspects:

One, viscosity is weakened

Temperature sensitivity: The glue part of the self-adhesive material is mostly composed of organic polymers, and its mechanical properties and viscoelasticity are easily affected by temperature changes. As the temperature decreases, the hardness of the glue increases and the viscosity weakens. This is because at low temperatures, the movement of the polymer chains in the adhesive is limited, reducing the elasticity and viscosity of the adhesive.

Specific performance: in the low temperature environment of 0℃ ~ 3℃, the self-adhesive may become hard and brittle, resulting in a significant decrease in viscosity. This may lead to the peeling phenomenon of the label in the labeling process and affect the firmness of the fit. At the same time, due to the loss of adhesive viscosity, the label attached to the item may be warped or even fall off, and cannot be used normally.

Two, processing problems

Poor printing: When the processing of self-adhesive labels is carried out in a low temperature environment, due to the reduction of material viscosity, poor printing may occur, such as ink adhesion is not strong, printing is fuzzy, etc.

Die-cutting and slitter problems: low temperature may also lead to label flying when die-cutting, slitter and other problems, seriously affecting the processing efficiency and product quality.

Three, labeling difficulties

Labeling temperature requirements: self-adhesive label paper usually has a minimum labeling temperature requirement, below which the glue viscosity of the self-adhesive is limited and labeling becomes difficult. Even if forced labeling, it is easy to have problems such as unstable and warped labels.

Preheating treatment: In order to overcome the influence of low temperature on labeling, it is sometimes necessary to properly preheat the label and the object to be stuck, so as to improve the viscosity and fit effect of the label.

Four, viscosity recovery time is extended

Peak viscosity time: After labeling, the viscosity of the sticker usually takes a period of time (usually 24 hours) to gradually reach the highest value. In a low temperature environment, this recovery time may be prolonged, thus affecting the immediate use of the label.

In summary, the low temperature environment has a significant adverse effect on the viscosity of the self-adhesive label paper. Therefore, when using self-adhesive label paper in winter or cold environment, special attention should be paid to controlling the temperature of storage, processing and labeling environment, and appropriate preheating treatment measures should be taken to improve the viscosity and fitting effect of the label. At the same time, when selecting self-adhesive label paper, its low temperature resistance should also be considered to adapt to different use environments.