Why should plastic film be compounded? What are the composite soft packing substrates?
Composite plastic soft packing commonly used are: transparent, color, black and white or color printing plastic composite film packaging, aluminum plastic composite film packaging, metal foil composite plastic film packaging, paper plastic film packaging.1) PE film, polyethylene, flexible packaging, more than 70% of the material is to use PE.2) BOPP film is biaxially oriented polypropylene, which is used in soft packaging3) PET films are polyester films used for printing and compounding4) CPP film, cast polypropylene film with heat sealing property5) PA film, that is, nylon film, barrier high6) PVDC film, barrier high, commonly used in sausage casings membrane7) PEN films are superior to PET in performance, but in view of price problems, there is no large-scale application.8) EVOH coextrusion film, through the EVOH and PE and PP and other coextrusion formed high barrier film9) aluminized film, high resistance film on the surface of PET, BOPP and CPP film.
Packaging made from a single kind of plastic film is not up to the mark. Such as heat sealing, load bearing, gas resistance, aeration, oxygen resistance, oil suppression, vacuum, cooking, anti leakage performance. Therefore, it is necessary to use several kinds of plastic film combinations with special functions to complement each other. The combination of several kinds of films requires adhesive processing, and the composite films are packed to meet the needs of the contents.
In the actual use of plastic flexible packaging, due to the different shape and physical properties of the package, the protection performance requirements are also different.
