Pre-coating film refers to advance will glue again after rewinding of plastic film and paper printing quality composite technology. It first used by pre-coating film processing according to different specifications wide will glue liquid coating on the film after rewinding for using manufacturers to choose, then combined with print. Laminating, namely the paster, is to plastic film coated with adhesive, and paper print after heating, pressure sticking together, form a unity of paper-plastic products processing technology. The effect of print, because the surface is much more a thin, transparent layer of plastic film, more smooth shiny surface, thus improve the print gloss and color fastness, picture and text color is more bright-coloured, rich stereo feeling, also have more waterproof, anti-fouling, wear-resisting, folding resistance, resistance to chemical corrosion, etc.

Process:

(1) thin film thickness between 0.*1 0.*2 mm, after dealing with the corona or other methods, the surface tension should reach 4.0 x ***2 n/m, in order to have good wetting and bonding performance.

2 film corona treatment the treatment effect is uniform, the higher the transparency is better, in order to make sure the print has covered the best clarity.

(3) thin film should have good light resistance, not easy to change color under the light irradiation for a long time, geometry size stability.

(4) thin film to come into contact with chemicals such as solvents, adhesives, printing ink, thin film should have certain chemical stability.

5] film appearance should level off, without uneven and wrinkles, no bubbles, shrinkage cavity and pitting defects.

Pre-coating film coated product features:

(1) through melting type pre-coating film coated products will not appear blister and take off the film phenomenon, a longer service life of the product.

Type 2 by solvent evaporation pre-coating film coated products in the printing ink layer thick, folding, die-cutting, indentation pressure is bigger, or in the workshop temperature higher environment, can also occur to take off the membrane and foaming phenomenon.

(3) type solvent volatilization pre-coating film impurities such as easy to stick dust during production, thereby affect the effect of the surface of the product effect.

(4) coated products basically won't appear curly phenomenon.