Packaging method using thermoplastic materials and package...

Details Packaging method using thermoplastic materials and package... Packaging method using thermoplastic materials and package...

B - Operations, Transporting

65

B

B65B 53/02 (2006.01) B65B 7/28 (2006.01) B65D 43/02 (2006.01) B65D 77/20 (2006.01)

Patent

CA 2170692

The invention is a packaging method including providing a tray with heat- sealable rims; loading the tray with a product to be packaged; applying a lid on top of the tray, the tray rims and lid having contacting surfaces being made of materials which can be heat bonded to each other at a lid sealing station to effect sealing of the lid to the tray rims, the lid comprising a biaxially oriented heat-shrinkable film having a maximum shrink force, measured at the temperature in the lid sealing station during sealing, of 0.05 kg/cm in at least the transverse direction; and heat-sealing the lid to the tray rims. A modified atmosphere can be introduced between the lid and the tray. The invention is also a package including a product; a tray in which the product is placed, the tray having heat-sealable rims; and a lid heat-sealed to the tray rims, wherein the lid comprises a biaxially oriented heat-shrinkable film having a maximum shrink force of 0.05 kg/cm in at least the transverse direction.

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