Food or edible material: processes – compositions – and products – Packaged or wrapped product – Three or more layered diverse packaging materials having at...
Patent
1998-05-01
1999-09-28
Bhat, Nina
Food or edible material: processes, compositions, and products
Packaged or wrapped product
Three or more layered diverse packaging materials having at...
426127, 426398, 426399, 426404, 426407, B65B 5500
Patent
active
059584866
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for treating a container for foods as well as to the container itself. More specifically the invention relates to a method for heat preservation of a container filled with a material, the heat preservation being accomplished by means of heating and a pressure which is maintained during the holding time of the preservation process.
Completed containers for consumers or for individual portions of the non-disposable type have existed for a long time within the packaging technology. After their first use these containers are intended to be returned and prepared for a new use. Foods are nowadays often filled and transported in containers of a through-away type, i.e. containers intended to be used only once and then discarded or recycled.
The demand on a container intended for foods is--whether it shall be used once or several times--that it should be easy to manufacture and handle as well as be designed and constructed in such a way that it gives the best protection possible to the product which is to be filled and transported in the container. A good product protection implies among other things that the container should be sufficiently mechanically strong and dimensionally stable in order to withstand the outer influences which it is exposed to during normal handling without being deformed or destroyed. Furthermore, the container should be sufficiently physically and chemically impermeable in order to prevent a transport of liquid and/or gases through the walls of the container.
Furthermore, it is often required that the container is constructed in such a way that it allows aseptic filling of a product which is sterilized and filled under sterile conditions in a likewise sterilized container which after filling is sealed in such a way that while stored before being consumed the filled product is not reinfected by harmful micro-organisms. In other cases it is required that the foodstuff should be heat preserved in its container.
Concerning heat preserved products, these have for a long time been packed in jars, and the most common raw material is sheet iron or tin-plate. Autoclavable jars are also manufactured from steel and aluminium. The raw material for jars is thus expensive and the manufacturing costs are large.
Glass containers have also been used for all kinds of foods for a long time. However, the problem with glass containers is that they are very sensitive to blows and impacts and therefore require special care in order not to be destroyed while handled. If they are shattered they can furthermore cause injuries during a subsequent handling and consumption. Moreover, glass containers are usually manufactured cylindrically and can for that reason not be effectively stored.
Nowadays, bottles and jars of other materials also exist. Rigid plastic containers can be manufactured rather inexpensively and with a simple technique. Plastic is stronger than glass and more corrosion resistant than metals. Furthermore, it is lighter than both glass and metal.
There is thus a need for an inexpensive sterile stacking container which can be sterilized.
The known laminated through-away containers often consist of several material layers which together endow the container its desired properties. In this connection a laminate means a material which is constructed of more than two layers joined together. By combining materials with different properties the laminate can obtain such a state which would not be achieved with one material only.
Thus, a known package material consists of a base layer of paper or cardboard, which gives the container mechanical strength and dimensional stability, and of outer layers of polyethylene which make the container liquid impermeable. In order to supplement the container with impermeability properties against for example gases and other substances the package material is provided with at least one additional layer of a material with desired properties, e.g. aluminium or a barrier polymer. A package material of the laminated type described becomes
REFERENCES:
patent: 3949114 (1976-04-01), Viola et al.
patent: 4291085 (1981-09-01), Ito et al.
patent: 4308084 (1981-12-01), Ohtusuki et al.
patent: 4310578 (1982-01-01), Katsura et al.
patent: 4559266 (1985-12-01), Misasa et al.
patent: 4667454 (1987-05-01), McHenry et al.
patent: 4702963 (1987-10-01), Phillips et al.
patent: 4986995 (1991-01-01), Kobayashi et al.
patent: 5455089 (1995-10-01), Mochida et al.
Parsson Majlis
Ringdahl Ulf
Bhat Nina
Tetra Laval Holdings & Finance S.A.
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