Generally, the circular die is used from the extruder to a proper form a thick walled tube of polypropylene. This is then blown under air force, orienting the film in the transverse direction. At the same time, an equivalent orientation in the machine direction is achieved by the speed at which the tube is pulled downwards and collapsed. After that, the film is heat set. And then Films are produced in this way can have process advantages during conversation. The film has a high gloss and clarity. It has a good puncture and flex-crack resistance over a wide range of temperatures. It is a good barrier to water vapor.
It is resistant to oils and greases. It does not wrinkle or shrink with environmental changes. You can get the benefits of bop film at Laem System a manufacturer of bopp film, like balanced orientation, excellent shrink tightening properties, improved film cutting, access to both thin and thick film technology, High machine direction stiffness, high tensile strength and low elongation for conversation. Laem System is known for its quality and safety also. Laem' s quality Management System has been certified in January 2004, by TUV, in compliance with the standards UNI EN ISO 9001:2000.
