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Food Packaging

Notes

From 09/26/2014 through 6/6/2012

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Film

Packaging

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Notes

1. “Food packaging is packaging for food. It requires protection, tampering resistance, and special physical, chemical, or biological needs. It also shows the product that is labeled to show any nutrition information on the food being consumed.” (Wikipedia, Food Packaging, 6/6/2012)

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2. “It is highly desirable in food packaging applications to have films covering thermoformed containers that, after having been heat sealed onto said containers can be easily peeled in order to provide an easy opening of the containers by the consumer. These films should thus have desired peelability, sufficient to provide an easy opening of the container while avoiding any miss opening of it during e.g. the storage and/or transport. These films should also have good optical properties and organoleptic properties.

In the present invention, a film is defined as an extremely thin continuous sheet: the upper limit for thickness is of about 250 .mu.m (Hawley's Condensed Chemical Dictionary, Twelfth Edition, Rev. by R. J. Lewis, Van Nostrand Reinhold Co., New York).

In the art, a peelable film is defined as a film, which, after having been heat sealed onto a thermoformed container, can be easily manually removed from it by a soft and regular peeling without causing any damage to the film and without leaving parts of the film on the rim of the container.”

[Fourcade, US Patent 8,258,237 (9/4/2012)]

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3. Most food containers are formed by thermoforming sheet plastics.  Many food products are heated by microwaves to 100C.  Most thermoplastic containers do not have high heat resistance and transparencey.

Sasauchi and Kawata of Nakamoto Packs Co., Japan, found a suitable thermoformed multilayer sheet consisting of A-PET layer, a functional resin layer with oxygen barrier properties and impact resistance.  During thermoforming there are two stretching and heat setting processes. 

8,840,826  9/23/2014
Method of making multilayer container

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 6/6/2012.