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Aseptic Packaging: It means filling of a sterilized and cooled product into
presterilized package in an atmosphere free from microorganisms. The pouches
used for such packaging are generally made of laminates and co-extruded multi-
layer films, which are high barrier / strength plastic materials, Apart from the regular
conventional pillow or stand-up pouches, there are other innovative variations like
built-in straw for beverages, moulded spout with a closure, reclosable seal, zipper
pouch, pouch with a handle, pouch with a transparent window to see the contents,
monofilament (with a tab) embedded in seal for ease of opening a sealed pouch,
retort pouch, aseptic pouch, water soluble pouch (methyl cellulose), etc.
Reclosable Pouches: Earlier, regular pouches either had to be cut open and the
contents transferred to another jar or container. These packs could not be reused
once opened. Reclosable pouches with Zippers, wherein the top had to be pulled
apart to open, and then pressed to seal again.
Stand up Pouches: Used for packing which is more convenient to use, store and
transport, and is cost effective also.
Spout Pouches: Earlier normal pouches with profiles used for packing of liquids
like oil have been replaced by easy to pour pouches with spouts, which make them
even more use friendly. The spouts can be pressed shut and opened whenever
required to be used again.
Large Bags with Liner: Earlier, large woven sacks were used for packing of wheat
flour, rice etc. These are now replaced by laminated bags with poly liner inside.
RETORT POUCHES: These are sterilized flexible food packages made from
aluminium foils / plastic composites. They were usually in the form of cans, but
nowadays they are available in pouches, trays and cartons for the conveniences of
the customers. Packaging films for retort food packages must meet the FDA's
requirements, must be stable at temperatures up to 125 degrees Celsius. These
packages require films with high seal strength so that they do not burst while being
heated and have excellent barrier properties for extended shelf life. Generally films
like polyester and nylon films or combinations of both are used to make packages.
The sealed packed food pouches are heated in autoclave. The retorted pouches
are then cooled and stored at an ambient temperature. The consumer can heat the
product in the retort pouch itself and the food is ready to eat.
Cling film - Also known as plastic wrap, cling film is a thin plastic film, generally
polyolefins, typically used for sealing food items in containers to keep them fresh for
a longer period of time. Cling film is typically sold on rolls in boxes with a cutting
edge. These plastic wraps cling to many smooth surfaces and therefore remain tight
over the opening of a container without adhesive or other devices.
In Nutshell: Active V/s Barrier Packaging
Barrier Packaging:
– Barrier is considered “Passive” as it erects walls to Product
degraders.
Active Packaging:
– Active packaging controls and reacts to events taking place
inside the package.

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