Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1983-04-25
1986-10-07
Kittle, John E.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428 36, 4285428, 215 1C, B29C 1707
Patent
active
046159258
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 embodiment, 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.
REFERENCES:
patent: 4061705 (1977-12-01), Marcus
patent: 4182457 (1980-01-01), Yamada et al.
patent: 4254170 (1981-03-01), Roullet et al.
patent: 4267143 (1981-05-01), Roullet
patent: 4391861 (1983-07-01), Nilsson
Mar. 1977-Research Disclosure, No. 155.
Kittle John E.
PLM AB
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