Biaxially oriented polypropylene film [1] has the advantages of light weight, non-toxic, odorless, moisture-proof, high mechanical strength, good dimensional stability, good printing performance, and good transparency. It has the advantages of high transparency, good gloss, good barrier, high impact strength and low temperature resistance. Its disadvantage is that it is easy to shrink the film when it is heat-sealed (except for the heat shrinkage performance of the heat-shrinkable smoke film). Its comprehensive performance is better than moisture resistance.
Cellophane, polyethylene (PE) film, PET film. BOPP film also has excellent printing results. The representative physical property data are as follows: turbidity < 1.5%, gloss > 85%; Tensile strength (longitudinal/transverse) > 120/200MPa; Elongation at break (longitudinal/transverse) < 180%/65%; The modulus of elasticity is 1700~2500Mpa; The embrittlement temperature is -50°C.
Disadvantages: The elongation is lower than that of PP, the heat sealing performance is poor, it is not easy to seal when used independently, and it is generally combined with PE and other films with good heat sealability when used.
Advantages: high tensile strength, good barrier performance, high transparency.
Due to the orientation of molecules, the crystallinity is improved, the tensile strength, impact strength, rigidity, toughness, moisture resistance, and transparency are all improved, and the cold resistance of the film is also improved
It has good gas resistance and moisture resistance
High transparency, good gloss and good printability
It is non-toxic, odorless and tasteless, and can be directly used in contact with food and medicine.