Method of producing a cup-shaped, sterilizable container

Claim 1

Method of producing a cup-shaped sterilizable container which comprises providing a stretch-drawable composite laminate of a total wall thickness between 30 and 200 microns, said laminate having an aluminum foil layer of a thickness less than 40 microns, a sealable plastic inner layer of high extensibility and a plastic outer layer of high extensibility and load-bearing capacity, drawing said laminate in a mold into a container with the side wall of the container running at a side wall angle (a) with respect to the direction perpendicular to the container bottom, wherein the composite material is combined deep and stretch drawn free from folds at a side wall angle (a) of essentially equal to or less than 30° using smooth-walled forming tools wherein at a side wall angle between about 15° and 30°, the combined deep drawing and stretch drawing takes place by means of a die, the composite material being deep drawn in a deep-drawing step to 30-70% of the depth (H) of the finished container and drawn in a following deep-drawing/stretch-drawing step to 75-95% of the depth (H) of the finished container and brought to the depth and width of the finished container in a stretch-drawing step following thereafter.