Shuttering Plywood is usually overlaid by film . The film is a piece of good paper impregnated resins (usually phenolic resins) . The impregnated resin content in the paper is one of important factors which determine the quality of film .
The brown film of Chinese brands can be classified into 3 quality grades: economical grade, ordinary grade and high grade.
The economical brown film is cheap and the quality is acceptable . But factories usually prefer to use brown film of ordinary grade .
As for shuttering purpose, the quality of ordinary brown film is good enough. Furthermore, ordinary brown film is about 15% cheaper than the Chinese brown film of high grade.
The Chinese brown film of high grade is as good as some imported brown film. Now, the Chinese brown film of high grade is a little cheaper or almost as expensive as some imported brown film .
Usually, as for shuttering plywood, the imported brown film is 120g/m2 ; the brown film of Chinese brand is usually 140g/m2 or more. If the film is heavier, the film is impregnated more resins which can improve the quality of film .
