Summer label knot? Did the glass transition temperature be noticed?

In the hot summer, it gradually swept across the north and south of the country. In a wave of heat waves, what problems are easy to label ? what is the reason? How to remedy? From this week, I will follow the label of the summer high temperature with the label.

Printed labels, all the inspections in the factory are in compliance with relevant standards. Will there be problems with customers after timely delivery? Perhaps you will answer “should not be”. The fact is that in the high temperature environment in summer, there is a problem that is very easy to occur – the knot, the customer must perform the manual break-up action before the label can be used. What is the reason?

In fact, everything is the fault of the glass transition temperature. So where do we encounter it in the label printing process? What effect does the glass transition temperature have on the label's entire life cycle?

1. The glass transition temperature of the surface coating material of raw and auxiliary materials is too low, which has a direct impact on label production.

Among the raw and auxiliary materials used for label printing , especially many special papers, the surface has a coating layer, and when the surface temperature of the coating materials of these special papers is too low, and the sealed paper is at too high temperature. Under the long-distance logistics transportation or long-term inventory, the surface coating material will become soft and sticky; as the storage temperature decreases, the surface coating will become hard, so the papers stacked together From the loose state to the whole of a knot.

Knotted label

Although the knotted paper will be broken during the cutting process, there will still be more or less sticking between the papers, which will cause the paper to be cut and the paper to stick.

When entering the printing process, there will be various printing problems such as double sheets and empty sheets, which will naturally cause more waste products, and the production efficiency will be greatly affected.

22. Labels printed on raw and auxiliary materials with too low glass transition temperature show adhesions during long-distance logistics.

When the surface coating of the substrate is selected from a polymer material with a low glass transition temperature, and we fail to apply full-cover or full-size printing ink to the substrate during the printing process, the printed label product may be In the long-distance logistics process, the bundled and sturdy label is sealed and stored in a van that does not touch the air. After a long time of heavy pressure at a high temperature, the surface of the substrate that has not been printed and glazed has been Adhesion occurred, which in turn caused the overall knot of the label.

Loose label

Similarly, the use of ink-printed labels with relatively low glass transition temperatures will result in a more or less complete labeling of the labels after high heat, sealing, and long-distance logistics.

It can be seen that the glass transition temperature index of the raw and auxiliary materials used in the label printing process has a great influence on the long-distance logistics under the high temperature sealing state of the label.

3. The influence of the glass transition temperature index on the preservation and use of the label on the client side

In order to avoid the adverse effects of the glass transition temperature, in addition to the factors such as the raw and auxiliary materials used for label printing, label logistics conditions, etc., it is also necessary to consider the preservation and use environment of the label at the customer.

If the customer's use or inventory temperature and humidity are too high, the label printed on the original and auxiliary materials with lower glass transition temperature may cause sticking and knotting problems, which may cause inconvenience to customers when using such labels.

In addition, even labels made from raw and auxiliary materials with relatively high glass transition temperatures will have a certain impact on the labels if they are not properly stored. The materials used for the labels are different. There are certain differences in the ambient temperature and humidity requirements. If you do not pay attention to such differences, or store labels in an environment with excessive temperature and humidity, it will have a certain amount of influence on the use of the labels. In short, the temperature and humidity of the label preservation environment should not be too high.

The state of the paper after being baked below and above the glass transition temperature

Some end users are very close to the label printing company. At this time, the label printing company may have such a mentality: such a close distance should not have to consider the influence of the transportation process, so some glass transition temperatures are used in the label printing process. Raw and auxiliary materials. Of course, this is not a problem in most cases, but if the customer's storage environment is hot and humid, then the labeling of the label will also occur.

Therefore, before selecting the original and auxiliary materials of the label, the label printing company should conduct a sufficient investigation on the label storage and use environment of the customer, so as to ensure that the label products will not have such problems in the use of the end customer, so as to maintain themselves. The credibility of the enterprise.

4. Influence of vitrification temperature index on the use of labeling products

The label is accepted and used by the end customer, and it does not mean that everything will be fine.

When the label is pasted on the product, it does not mean that the glass transition temperature of the label will increase. When the label with the glass transition temperature is too low, the product is placed in a high temperature and high humidity environment, and then the corresponding After the pressure is applied, there will still be problems such as adhesion.

Therefore, for the products with the label attached, it is also necessary to pay attention to the storage and use environment. Only by fully understanding the logistics status, use environment and storage conditions of these products can the qualified raw and auxiliary materials be applied to the label printing operation. Ensure that the printed label products can fully meet the requirements of use.

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