Method for diminishing delamination of a multilayer plastic container
OwnerFrank J. Schmidt, Armen Zakarian +2inventors
InventorsFrank J. Schmidt, Armen Zakarian, John M. Rost, Prasad Joshi
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Abstract
A method of filling a multilayer container includes providing a multilayer container that is subject to delamination, introducing product contents at an elevated temperature and a liquefied gas, and capping or otherwise sealing the container. The pressure within the container remains positive at temperatures at least as low as ambient, and preferably down to the lower range of household or commercial refrigeration temperatures.
Claims30
A method of filling a hot-fillable container that inhibits container delamination, comprising the steps of
- a. providing a container formed of multiple layers and suitable for hot filling, the multiple layers excluding tie layers;
- b. introducing a comestible product into the multilayer container at an elevated temperature;
- c. introducing a quantity of liquefied gas into the container;
- and
- d. capping the container so as to enable the liquefied gas to form a positive pressure inside the container before the container is cooled to ambient temperature, whereby the positive pressure inhibits delamination of the container layers.
A method of filling a container that inhibits container delamination from internal vacuum deformation or mechanical abuse, comprising the steps of
- a. providing a container formed of multiple layers, the multiple layers excluding tie layers;
- b. introducing a product into the multilayer container;
- c. introducing a quantity of liquefied gas into the container;
- and
- d. capping the container so as to enable the liquefied gas to form a positive pressure inside the container, whereby the positive pressure inhibits delamination of the container layers.
16 The method of claim 15 wherein the introducing step b) and the introducing step c) are performed at approximately room temperature.
The method of claim 16 wherein the product is a comestible product.
The method of claim 16 wherein the product is water.
25 The method of claim 15 wherein the quantity of liquefied gas is such that the container has a substantially atmospheric internal pressure upon cooling to approximately 50 degrees F.
Dependencies are inferred from the claim text.