Under what environmental conditions will the adhesion of copperplate paper labels be affected?

The adhesion of copperplate paper labels may be affected by various environmental conditions, mainly including the following aspects:

1、 Temperature

High temperature environment:

Under high temperature conditions, the adhesion and printing effect of self-adhesive copperplate paper may be affected. The specific temperature resistance range is usually between -40 ℃ and 150 ℃. Exceeding this range may cause issues such as label detachment or blurry printing.

In high temperature environments, the molecular motion of label materials intensifies, which may cause the adhesive to soften, thereby reducing its viscosity.

Low temperature environment:

Under low temperature conditions, the stickiness of self-adhesive copperplate paper may decrease, making it difficult to stick the label.

Low temperature will make the adhesive harder, reduce its fluidity, and thus affect its viscosity.

2、 Humidity

High humidity environment:

A humid environment can cause copperplate paper to absorb water, the paper fibers to swell, and the hydrogen bonds between fibers to be broken, resulting in a significant decrease in the paper's folding resistance and affecting the effectiveness of label pasting.

High humidity may also increase the moisture in the adhesive, leading to a decrease in viscosity.

Low humidity environment:

Although low humidity environments have a relatively small direct impact on the adhesion of copperplate paper labels, excessively dry environments may cause the paper to become brittle and hard, increasing the risk of damage during processing and pasting.

3、 Ultraviolet irradiation

Long term exposure to ultraviolet radiation may cause the surface of copperplate paper labels to age, reducing the performance of the adhesive and thus affecting its stickiness.

4、 Chemical contact

Certain chemicals (such as solvents, oils, etc.) may react with adhesives, leading to a decrease in their performance and subsequently affecting the adhesion of copperplate paper labels.

5、 Surface characteristics of the pasted object

The surface energy, roughness, and presence of plasticizers or release agents of the object being pasted can also affect the bonding effect of the adhesive. For example, materials with low surface energy may result in insufficient wetting and diffusion of adhesives, thereby reducing viscosity.

In summary, the adhesion of copperplate paper labels may be affected by various environmental conditions such as temperature, humidity, ultraviolet radiation, chemical contact, and surface characteristics of the pasted object. To ensure the adhesive effect of the label, these factors should be fully considered before use, and appropriate label materials and adhesive types should be selected.