What's the use of bopp Thin film?
Author：adminTime：2021-07-23 10:42 Browse
BOPP film is a very important flexible packaging material, which is widely used. BOPP film is colorless, odorless, tasteless and nontoxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The surface...
BOPP is the abbreviation of "Biaxially Oriented Polypropylene", that is, biaxially oriented polypropylene. Its production is that the melt of high molecular polypropylene is first made into sheet or thick film through a long and narrow die, then stretched in two vertical directions (longitudinal and transverse) at a certain temperature and a set speed in a special stretching machine, and then made into a thin film after proper cooling or heat treatment or special processing (such as corona, coating, etc.).
Uses of bopp thin films
BOPP film is a very important flexible packaging material, which is widely used. BOPP film is colorless, odorless, tasteless and nontoxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The surface energy of BOPP film is low, so corona treatment is needed before gluing or printing. However, after corona treatment, BOPP film has good printing adaptability and can be overprinted to get beautiful appearance, so it is often used as the surface material of composite film. BOPP film also has some shortcomings, such as easy accumulation of static electricity, lack of heat sealability and so on. In the high-speed production line, BOPP film is easy to generate static electricity, so it is necessary to install static electricity remover. In order to obtain heat-sealable BOPP film, heat-sealable resin glue such as PVDC latex and EVA latex can be coated on the surface of BOPP film after corona treatment, and solvent glue can also be coated. Heat-sealable BOPP film can also be produced by extrusion coating or coextrusion. The film is widely used in the packaging of bread, clothes, shoes and socks, as well as the cover packaging of cigarettes and books. The initial tear strength of BOPP film is improved after stretching, but the secondary tear strength is very low. Therefore, there should not be any cuts on both ends of BOPP film, otherwise BOPP film is easy to tear when printing and compounding. Sealing tape can be produced after BOPP is coated with self-adhesive tape, which is a market with a large amount of BOPP.