How does flame treatment improve the printability of BOPP synthetic paper?

The degree to which flame treatment improves the printability of BOPP synthetic paper depends on a number of factors, including the temperature of the flame, the distance between the flame and the synthetic paper, the processing time, and the material characteristics of the synthetic paper itself. The following is a detailed analysis of the degree to which flame treatment improves the printability of BOPP synthetic paper:

Principle of flame treatment

Flame treatment is to make the surface of the plastic instantaneously oxidized by high temperature flame, thus changing its surface properties. Specifically, the high temperature and active species in the flame (such as free radicals) can attack the molecular chains on the plastic surface, introduce polar groups, increase the surface roughness, thereby increasing the surface tension, so that printing materials such as ink can better adhere to the plastic surface.

Improvement degree analysis

1. Surface tension enhancement:

Flame treatment can significantly improve the surface tension of BOPP synthetic paper, making it closer to or more than the wetting tension required by the ink, thereby enhancing the adhesion and printing effect of the ink.

The extent to which the surface tension is raised depends on the parameters of the flame treatment and the material characteristics of the synthetic paper itself.

2. Printing adhesion enhancement:

After the flame treatment, the chemical structure and physical form of the surface of the BOPP synthetic paper are changed, which is conducive to the penetration and curing of the ink, thus improving the printing adhesion.

This means that during the printing process, the ink is less likely to fall off or blur, and the durability of the print is improved.

3. Printing effect improvement:

Flame treatment can also improve the printing gloss, color brightness and other visual effects of BOPP synthetic paper, so that the print is more beautiful.

However, it should be noted that excessive treatment may cause the surface of the synthetic paper to burn or produce other adverse effects, so it is necessary to control the parameters of the flame treatment.

Influencing factors

Flame temperature: The higher the temperature, the more obvious the treatment effect, but it may also increase the risk of burning.

Treatment time: The longer the treatment time, the more the surface tension increases, but there is also the risk of burning.

The distance between the flame and the synthetic paper: too close a distance may lead to burning, and too far a distance is not good.

Synthetic paper material: Synthetic paper with different formulations and additives may respond differently to flame treatment.

Conclusion

Flame treatment can significantly improve the printability of BOPP synthetic paper, increase the surface tension, enhance the printing adhesion and improve the printing effect. However, in order to ensure the best treatment results, the parameters of the flame treatment must be strictly controlled and adjusted according to the specific material characteristics of the synthetic paper.

It should be noted that although flame treatment is effective in some cases, modern industrial production is more inclined to use methods such as corona treatment, because corona treatment has the advantages of simple operation, good treatment effect and easy control. In practical applications, suitable surface treatment methods can be selected according to specific needs and conditions.