Process for thermoforming a biaxial stretched plastic film

摘要

The procedure for producing objects from mono or multi-layered plastic film with a container formed by thermoforming from film plane, comprises thinning a flat- or band shaped flat material having thickness of 0.4 mm corresponding to the construction of the plastic film by biaxial stretching in longitudinal- and transverse direction on the thickness of the plastic film before the thermoforming. The flat material is produced by extrusion or co-extrusion. The plastic film has a thickness of 0.110 mm. The stretching ratio of the longitudinal- and transverse direction is equal. The procedure for producing objects from mono or multi-layered plastic film with a container formed by thermoforming from the film plane, comprises thinning a flat- or band shaped flat material having thickness of 0.4 mm corresponding to the construction of the plastic film by biaxial stretching in longitudinal- and transverse direction on the thickness of the plastic film before the thermoforming. The flat material is produced by extrusion or co-extrusion. The plastic film has a thickness of 0.110 mm. The stretching ratio of the longitudinal- and transverse direction is equal and the stretching of the longitudinal- and transverse direction is simultaneously carried out. The stretching ratio is 2:1-6:1.