Flatness of pressure-sensitive adhesive materials and suggestions for use

Pressure-sensitive adhesive materials will encounter the problem of material smoothness in the process of processing, which is common in the following scenario

For example, digital printing materials, after opening the book is found to have the problem of flatness, affect the subsequent processing;

For example, in the process of digital printing, especially Latex, UV and other devices that require high smoothness, the phenomenon of “wiping nozzle” will occur.

For example, in the process of screen printing, there will be color matching dislocation;

For example, flatness will be found in the subsequent construction, affecting the construction;

From the structure of pressure sensitive adhesive materials, the general structure can be divided into: film/film, adhesive, and backing paper; The base paper is the bearing base of the pressure-sensitive adhesive material, which is the key structural layer affecting the flatness.

The base paper (excluding plastic base paper) is mainly composed of base paper fiber and water, among which the paper fiber is closely combined with water, and reaches a “balance state” with the water in the environment, and the material as a whole presents a “flat” state.

When the humidity in the environment is higher than the moisture content in the back paper, the paper fiber will absorb water and expand, resulting in the material “warping”, affecting the processing performance of the material;

When the humidity in the environment is much lower than the water content in the back paper, the paper fiber will lose water and shrink, and also lead to the material “warping”, affecting the material processing performance; The temperature of the environment also affects the rate of water absorption and loss.

Therefore, ensure that the material is stored in the appropriate temperature and humidity environment, to ensure the processing performance of the material. Especially for the use of single shower bottom paper, CCK bottom paper materials, more attention needs to be paid to the storage and processing of temperature and humidity regulation, in order to ensure the smoothness of the product.

So how to avoid the problem of flatness in the storage and use of pressure-sensitive adhesive products?

Please refer to the following suggestions:

1) The product must be stored in an indoor environment, the recommended storage environment is 23°C±2°C, 50±5%RH, if the humidity is too high, it is recommended to use a dehumidifier for dehumidification.

2) All the materials produced by Avery Dennison have outer packing boxes and plastic moisture-proof bags, which can effectively reduce the risk of moisture absorption;

3) Do not open the product package easily during the storage process or wrap the remaining materials completely after the end of use;

4) In the processing process and environment, also require a constant temperature and humidity environment, the recommendation is 23°C±2°C, 50±5%RH;

5) After the product is processed, it is necessary to wait for the solvent to completely volatilize, and then organize and wrap the product in a timely manner to prevent the smoothness problem caused by moisture absorption during subsequent storage and transportation.

Smprotectivefilm is also committed to the emulsion pressure sensitive adhesive research and development, production, sales of the company. We can effectively solve the problems that customers encounter in the use of glue because of different production equipment and technology.

We specialize in the production of protective film and pressure sensitive adhesive for many years, with our own R & D team. In the future, through continuous research and development and summing up experience, our glue can be applied to more product application fields.