OPP film has many disadvantages: such as it is easy to accumulate static electricity and it has no heat sealing.
When it operate at a high speed production line, OPP film is easier to generate static electricity, so an electrostatic removing device is needed.
In order to get the heat-sealable OPP film, we’d better to coat with the resin solutions like PVD latex, EVA latex etc. and it could also use the method of extrusion coating and co-extruded composite to produce the heat-sealable OPP film.
Of course, different production methods will lead to different results of OPP films.
To get a better performance of films, the multilayer composite method is usually adopted.