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When polypropylene film is extruded and stretched in both the machine direction and across machine direction it is called biaxially oriented polypropylene. biaxial orientation increases strength and clarity. bopp is widely used as a packaging material for packaging products such as snack foods, fresh produce and confectionery.
Biaxial (having two axes) stretching of film is used for a range of applications and is the primary manufacturing process by which products are produced for the food packaging industry. biaxial stretching of film: principles and applications provides an overview of the manufacturing processes and range of applications for biaxially stretched films.
120—140° c (uniaxially drawn films); in the case of biaxially drawn films stretching in the machine direction was immediately followed by stretching in the transverse direction (td) by means of a tenterframe. td—stretching was performed at a temperature at least 20° c higher than md—stretching.
Providing the widest film stretching lines with the highest output and the lowest production costs, we still remain flexible in order to allow the production of a variety of films. our innovations and experience enable us to supply solutions that will serve film producers‘ needs better in various markets – whether in the cost-competitive ...

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