B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/978
B29C 65/68 (2006.01) B29C 61/02 (2006.01) B29C 63/42 (2006.01) B29D 23/00 (2006.01)
Patent
CA 1234467
ABSTRACT Multilayer tubular container as a means of transport and storage for chemi- cals, beverages, food, etc. It is provided with a tubular casing of a par- ticular inner cross-section, the casing being composed of a first layer of a both axially and radially oriented polyethylene terephthalate and having a thickness of 50-1000 µm, and of a second layer which has been shrunk onto said first layer. The polyethylene terephthalate of the first layer is heat-set into the shape of said cross-section to a degree of crystallisa- tion of at least 25%. A film-like intermediate layer is compressed between the first and the second layers, e.g., to improve the gas barrier proper- ties. The second layer is composed of a both axially and radially oriented polyethylene terephthalate having a thickness of 75-1000 µm, and is heat- set to a degree of crystallisation of at least 25% on the form of the intermediate layer. This container is dimensionally stable at high tempera- tures, particularly sterilisation temperatures.
458756
Akzo N.v.
Marks & Clerk
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