Introduction of BOPP film and BOPET film

When we choose packaging materials, we can often hear the shortcomings of two plastic films, BOPP and BOPET. What is the difference between them?

BOPP is an abbreviation for "Biaxially Oriented Polypropylene", which is a biaxially oriented polypropylene film. It is produced by first making a melt of high molecular polypropylene into a sheet or a thick film through a narrow machine head, and then in a dedicated stretching machine, at a certain temperature and set speed, simultaneously or step by step. A film that is stretched in two perpendicular directions (longitudinal, transverse) and subjected to appropriate cooling or heat treatment or special processing (such as corona, coating, etc.). BOPP film is a very important flexible packaging material. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. BOPP film has low surface energy and needs corona treatment before coating or printing. However, after corona treatment, the BOPP film has good printing adaptability, can be printed in color, and has a beautiful appearance effect, and thus is often used as a surface layer material of the composite film.

The BOPET film is a biaxially oriented polyester film. BOPET film has the characteristics of high strength, good rigidity, transparency, high gloss, small heat shrinkage, antistatic and high temperature resistance. However, BOPET is dense and will be attacked by strong alkalis.learn more about opp&bopp film.