Retortable container

Details Retortable container Retortable container

B - Operations, Transporting

29

C

B29C 51/42 (2006.01) B29C 51/14 (2006.01) B32B 27/08 (2006.01)

Patent

CA 2057529

A retortable container has a wall of at least two co-formed laminas. This wall is highly impermeable to fluids selected from the group consisting of oxygen and aromatic vapors. The wall includes a first load-carrying lamina of a first plastic material. This load-carrying lamina has been formed without mechanical hysteresis in the melt phase by a thermal pressure forming apparatus to cause strengthening with orientation of the load-carrying lamina in at least one axis but without memory of its pre-melt phase shape. The wall also includes a second sealing lamina of a second plastic material. This second sealing lamina is coextensive with the first load- carrying lamina. Consequently, the container formed by the apparatus is retortable, i.e. it can withstand temperatures and pressures of a retort chamber without undergoing signifi- cant and permanent distortion.

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