Why should we add corona machine in the flat lamination line for foam board lamination?
The main reasons why foam boards need to be corona treated before use are as follows.
Improvement of surface energy.
Without corona treatment of the surface of the foam sheet there is a low surface energy,
surface tension is small.
Corona treatment can improve the energy state of the surface of the foam board,
increase the surface polar groups, and thus improve the surface energy.
Improvement and enhancement of adhesion.
Improved surface energy is conducive to the bonding of foamed boards with other
materials such as paints and adhesives, thus enhancing the adhesion of the surface.
Corona treatment can improve the affinity of the surface of the foam board, which
is conducive to the good adhesion of coatings and adhesives.
Improve the adhesion of paint film.
Untreated foam board surface finish is low, the coating film is difficult to adhere firmly.
Corona treatment can increase the surface roughness, provide better adhesion points for
the coating film, and improve the adhesion of the film.
Improvement of adhesion: Corona treatment can improve the surface roughness of foamed board.
Corona treatment can improve the wettability of the surface of the foam board, enhance
the surface ink absorption, which is conducive to improving the quality of lamination.
In summary, corona treatment is to improve the surface performance of the foam board,
enhance its adhesion with other materials compatibility of effective means, is a necessary
pretreatment process for the application of foam board.
