BOPP is short for "Biaxially Oriented Polypropylene". BOPP film is biaxially oriented polypropylene film.
When BOPP film manufacturer produces BOPP films, he will make melt body of high polymer polypropylene into sheet material or thick film firstly through long and narrow handpiece. Then inside a dedicated stretch machine, under certain temperature and set speed, stretch will be proceeded at the same time or step by step in two vertical directions (vertical and horizontal). And after appropriate cooling, heat treatment or special processing (such as electric corona, and depositing), BOPP films are finished.
Common BOPP films include: General biaxially oriented polypropylene film, heat seal biaxially oriented polypropylene film, cigarette packaging film, biaxially oriented polypropylene pearl film, biaxially oriented polypropylene metallized film, matt film, etc.
BOPP film is a very important kind of flexible packaging material. BOPP film is colorless, odorless, tasteless, non-toxic and has high tensile strength, impact strength, stiffness, toughness and good transparency.
BOPP film is weak on interface energy, and it needs corona treatment before glueing or printing. After the corona treatment, BOPP film will enjoy excellent printing adaptability. It can be polychrome printed to get exquisite exterior look, which is the reason why BOPP film is often used as surface material of composite film.
BOPP film also has some shortages. For example, it is easy to accumulate static electricity and has no heat sealability. On the fast-moving production line, BOPP film is prone to produce static electricity so that there needs to install static remover. In order to obtain heat sealable BOPP film, the BOPP films, after corona treatment, can be coated with heat-seal resin glue, such as PVDC latex, EVA latex or solvent adhesive. Besides, extrusion coating or coextru-lamination methods can be used for manufacturing heat sealable BOPP film. Such films are widely used for packaging of bread, clothes, footwear, as well as cigarettes, book cover packaging. The initiating tearing strength of BOPP film will be increased after the stretch, but the secondary tearing strength is very low. Therefore, any cut cannot be left at both ends of BOPP films face, or at the time of printing or laminating, BOPP film will be easy to tear off. After coating adhesive sticker, BOPP can be used to produce packing tape.
www.bopp-film.net and its subsidiary BOPP film manufacturer Guangdong Decro Package Films Co., Ltd., combine to provide more than 20 years of BOPP plastic film production, providing its customer the most advanced range of BOPP products in the WORLD today.
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