Method for producing containers

Details Method for producing containers Method for producing containers

B - Operations, Transporting

65

D

18/514

B65D 1/02 (2006.01) B29C 31/00 (2006.01) B29C 49/14 (2006.01) B29C 49/22 (2006.01) B29C 49/54 (2006.01) B29C 55/30 (2006.01) B29C 59/04 (2006.01) B29C 67/00 (2006.01)

Patent

CA 1181556

- 19 - ABSTRACT A method for providing a container with one or more layers of barrier material during the production of the container from a thermoplastic. A preform (10) is stretched in its axial direction, generally an amount corresponding to the total axial stretching required for conversion of the preform to a container, after which the stretched preform (11, 13) is provided with one or more barrier layers (12, 14), and the preform is then heated and converted to a container. In one embodi- ment, the axially stretched preform (15) is produced by assembling axially stretched part-preforms (13a,b) covered with one or more barrier layers. The combined preform is then converted to a container. By means of the invention, it is possible to reduce the thickness of the barrier layers at the time of their application, which considerably simplifies the latter.

378549

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