What kind of environment will affect the stickiness of self-adhesive coated paper?

The stickiness of self-adhesive coated paper may be affected by a variety of environmental factors, mainly including the following aspects:

1. Temperature

Low temperature environment: As the ambient temperature drops, the glue viscosity in the self-adhesive material will become weaker. This is because at low temperatures, the activity of the molecules in the glue slows down, resulting in reduced adhesion. In the cold environment, the self-adhesive label may be unstable or easy to fall off.

High temperature environment: When the ambient temperature is too high, self-adhesive materials may overflow, especially film materials are more likely to occur than paper materials. High temperature will make the glue soften and flow, affecting the adhesion performance and stability of the label.

2. Humidity

High humidity environment: the surface material and the base paper of the self-adhesive material are easy to absorb moisture and expand in a humid environment, especially the base paper of paper materials absorbs water and expands faster. This expansion will cause the material to curl, affecting the printing and labeling effect. At the same time, when the humidity is too high, the hydrogen bond between the fibers of the paper after water absorption is damaged, which may lead to the folding of the paper, the ink adhesion fastness is reduced, and even the printing ink loss problem.

Low humidity environment: Although the low humidity environment does not directly cause the expansion of the self-adhesive material as the high humidity does, long-term low humidity may cause the material to dry and affect its viscosity.

3. The surface state of the object to be affixed

Surface energy: The surface energy of different materials is different, such as stainless steel, glass, PET, PP, PE, etc. The higher the surface energy, the easier the adhesive label is to adhere.

Roughness: The rougher the surface of the adhesive, the more detrimental to the adhesion of the adhesive label, because the rough surface increases the air gap between the label and the adhesive.

Cleanliness: If there are impurities such as oil, water droplets, and dust on the surface of the adhesive label, it will affect the adhesion effect of the adhesive label, because these impurities will prevent the direct contact between the glue and the surface of the adhesive.

4. Labeling pressure

When the self-adhesive material is glued to the object, a certain pressure is required to ensure that the glue and the surface of the object are fully in contact and form a good adhesion effect. If the labeling pressure is insufficient, the label may warp or fall off.

5. Storage and use environment

Storage environment: The storage environment of self-adhesive materials should be maintained in appropriate temperature and humidity conditions to avoid material aging or performance degradation. In general, it is recommended that paper self-adhesive label materials be stored in the following ambient temperature and humidity: temperature 22 ° C ±2 ° C, relative humidity 50%±5%.

Use environment: During use, the ambient temperature and humidity should also be kept as stable as possible to avoid sudden changes in temperature or humidity affecting the stickiness of the sticker label.

In summary, the stickiness of self-adhesive coated paper is affected by many factors such as temperature, humidity, surface state of the material to be affixed, labeling pressure, and storage and use environment. In order to ensure the adhesion performance and stability of self-adhesive labels, these environmental factors need to be strictly controlled during use and storage.