The label printing process involves many processes, and there are many internal and external influence factors, but some factors can not attract our attention in the first time, but these neglected influencing factors can often inadvertently treat us as a whole. The production process has an immeasurable impact.

So what effect does the glass transition temperature have on printed labels?

We know that substrates such as paper, inks, and various chemical products are used in the label printing process, and most of these products are high molecular compounds. Although substrates such as paper may not belong to the category of amorphous polymers, there are many special paper surface coating materials that contain amorphous polymers, and such amorphous polymers naturally have a glass transition temperature. This indicator.

By knowing the characteristics of the glass transition temperature, we know that when the glass transition temperature is too low, in the environment where the temperature is higher than the relative critical point, these amorphous polymers will have a tendency to transition from a solid to a viscous liquid; When lowered below the critical point of the glass transition temperature, these amorphous polymers become solid again.

The printed label is because the glass transition temperature of the polymer binder used in the surface layer ink is too low, resulting in glass transition in the sealed environment during long-distance transportation, thus causing adhesion between the labels. Although this did not affect the continued use of the label, it caused unnecessary trouble to the customer.

Effect of glass transition temperature on label production and use

Now that we understand the glass transition temperature and the associated hazards, what are we going to encounter in the label printing process? What effect does the glass transition temperature have on the label's entire life cycle?

1. The direct influence of the low glass transition temperature of the surface coating material of the raw and auxiliary materials on the label production

Among the raw and auxiliary materials used for label printing , the most important ones are substrates and inks, especially many special papers, which have a coating layer on the surface, and when these special paper surface coating materials have a low glass transition temperature, The sealed paper undergoes long-distance logistics or long-term inventory at too high a temperature. At this time, the surface coating material becomes soft and sticky; as the storage temperature decreases, the surface coating becomes hard. Form, so the paper stacked together changes from a loose state to a whole knot. 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.