Tubular object of a layered plastics material and a method for t

Details Tubular object of a layered plastics material and a method for t Tubular object of a layered plastics material and a method for t

1984-06-25

1986-08-05

Kittle, John E.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

215 1C, 220450, 220453, 220DIG14, 156 86, 428481, B29C 1707

Patent

active

046043071

ABSTRACT:
Multilayer tubular container as a means of transport and storage for chemicals, beverages, food, etc. It is provided with a tubular casing of a particular 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 .mu.m, 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 crystallization 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 properties. The second layer is composed of a both axially and radially oriented polyethylene terephthalate having a thickness of 75-1000 .mu.m, and is heat-set to a degree of crystallization of at least 25% on the form of the intermediate layer. This container is dimensionally stable at high temperatures, particularly sterilization temperatures.

REFERENCES:
patent: 2784456 (1957-03-01), Grabenstein
patent: 2989785 (1961-06-01), Stahl
patent: 4014724 (1977-03-01), Rausing
patent: 4172873 (1979-10-01), Spicer
patent: 4198458 (1980-04-01), Mitsuishi et al.
patent: 4233022 (1980-11-01), Brady et al.
patent: 4355756 (1982-10-01), Furuya et al.
patent: 4436777 (1984-03-01), Karpiloff

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