1, OPP English full name Oriented Polypropylene, uniaxially stretched polypropylene film. OPP stretches the polypropylene film cast in the transverse direction and can be printed and compounded. There are two main types of material structure: transparent and non-transparent, transparent OPP/CPP, non-transparent OPP/VMCPP, most of which are sealed by ultrasonic due to poor heat sealing of OPP.

 

2, BOPP English full name Biaxial Oriented Polypropylene, biaxially oriented polypropylene film. BOPP stretches the cast polypropylene film in the transverse and longitudinal directions and has high tensile strength, impact strength, rigidity, toughness and good transparency.

 

 

3. The BOPP film is obtained by coextruding polypropylene particles into sheets, and then stretching in both directions. Due to the tensile orientation, the film has good physical stability, mechanical strength, air tightness, high transparency and gloss, and is tough and wear resistant. It is currently the most widely used printing film, generally having a thickness of 20-40 μm. The most widely used is 20 μm. BOPP is generally used as an outer film of a composite film. For example, it is ideal for moisture-proof, transparency, strength, stiffness and printability after being combined with a polyethylene film, and is suitable for holding dry foods. Since the surface of BOPP is non-polar, the crystallinity is high, and the surface free energy is low, the printing performance is poor, the adhesion to the ink and the adhesive is poor, and surface treatment is required before printing and compounding.

 

4, BOPP film is suitable for a variety of packaging, printing, composite, aluminum plating, etc., such as cigarette packaging film, widely used in food, medicine, daily light industry, clothing, cigarettes and other packaging materials, and a large number of composite film The substrate is not only replacing traditional paper packaging in many occasions, but also has replaced ordinary packaging films such as PE, PP and PVC in many packaging fields.

 

5, OPP film is mainly used for packaging bags and composite materials with other materials, etc., single film OPP is mostly used to package lightweight paper products such as disposable paper cups.