The reason why tinplate spte cans become the leading food packaging materials at present, to a large extent, their effectiveness should be attributed to the important protective effect of the inner coating on electrolytic tinplate sheets. The performance of the coating on tinplate steel not only makes the finished product corrosion resistant, but also has good Its adhesion, flexibility, non-toxic and tasteless. The coating on tinplate spte can withstand high temperatures without losing its performance. In addition, you must choose the type of paint and determine the thickness of the coating according to the contents of the tin can. The coating thickness of the coating is generally required to be controlled between 3.5 ~ 6.0g / m2. Within this printed thickness range, the coating must have a certain porosity. The liquid containing the contents can penetrate the surface of the tin layer through these gaps, and the tin is slowly welded to form tin ions, so as to extend the shelf life of the tin can.
