Advantages and disadvantages of opp film and cpp film, what kind of packaging bags are they used for?

Cast polypropylene has the characteristics of good transparency, high gloss, good stiffness, good moisture resistance, excellent heat resistance and easy heat sealing.

Cast polypropylene has been printed and bagged, suitable for: clothing, knitwear, flower packaging bags; Film for documents and photo albums; Food packaging; And a metallized film suitable for blocking packaging and decoration.

Potential applications also include: food packaging, candy packaging (twisted conjunctiva), medicine packaging (infusion bag), replacing PVC, synthetic paper, adhesive tape, business card holder, ring clip and vertical bag composite materials in photo albums, folders and documents.

Chlorinated polypropylene has excellent heat resistance. Because the softening point of PP is about 140℃, this kind of film can be used in hot filling, retort pouch, aseptic packaging and other fields. In addition, it also has excellent acid resistance, alkali resistance and oil resistance, and is the first choice for bread product packaging or laminating materials. It is safe to contact with food and has excellent demonstration performance, which will not affect the flavor of the food. Different grades of resin can be selected to obtain the required characteristics.

OPP: Oriented polypropylene (film), stretchable polypropylene, which is a kind of polypropylene.

OPP main products:

1, OPP tape: based on polypropylene film, it has the advantages of high tensile strength, light weight, non-toxic, tasteless, environmental protection and wide application range.

2.OPP bottle has light weight, low cost, improved transparency and good heat resistance, and is suitable for hot filling.

In recent years, two-way polypropylene (OPP) transparent bottle has become a substitute for PET bottle. According to the online report of coatings, the current applications in packaging include self-adhesive labels, in-mold labels, winding labels and wet glue point labels. The latter is mainly used to label drinks and alcohol abroad. In recent years, self-adhesive labels and in-mold labels have been gradually introduced into China market from Europe, and their application fields include food, chemical industry and daily chemical products.

In addition, OPP, like PE and PVC film, should be used for shrink film, which has the advantages of high transparency, good gloss, high shrinkage and shrinkage stress, but poor heat sealing performance and strength, high shrinkage temperature and narrow range.

References:

Baidu Encyclopedia -OPP protective film, Baidu Encyclopedia-cast polypropylene