The plastic food packaging coating, also
known as cling films, have globally transformed the food and beverages
market. Plastic food packaging coating is preferred as it majorly
contributes to the health and hygiene of the food article, also
preventing it from contaminants and preserving it. Further, the cling
films are considered as a cost effective way for food presentation.
Cling films are soft plastic wraps of polyvinylidene chloride (PVC).
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Polyvinylidene chloride is permeable to
water vapor and oxygen, which in turn, extends the shelf life of the
product or increases the peak freshness of the wrapped food articles.
Cling films are now an indispensable non-food item for the food and
beverages industry. Cling film being smooth surfaced will cling on to
some of those surfaces which are smooth and thus can remain tightly
fixed over the opening of the container without any use of adhesives.
The cling films can keep the food articles moist in the fridge without
any flavor and odor loss. It can be ideally used to wrap sandwiches,
cover leftover food, cover plated meals or fruits in a basket while
travelling and to preserve food on a general note.
The cling films are available in 8
micron, 9 micron and 10 micron thickness. The cling film’s application
is based on thickness of the film. Also, it is available in
60,70,80,90,100,115 and 150 Gauge. They are used based on the strength
and capacity of the film to carry the product. Cling films are segmented
into two forms namely Cast cling film and Blown cling film. The cast
cling film is made from a continuous melting procedure of a
thermoplastic and extracted from a flat die on a chill roll. This has a
good clarity and a good tear resistance. It is comparatively less
expensive. The blown cling film is manufactured using blow extrusion
process. It is tougher and more resilient than cast cling film. It can
take higher loads as compared to cast cling film. But blown cling film
has poor clarity and is more expensive than cast cling film.
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Apart from all the advantages it also has
disadvantages that can hamper the product wrapped. It can tear off due
to extreme weather or rough transport. Or it can even melt due to
extreme temperature. This calls for an alternative to cling films, of
which there are very few. The alternatives include cohesive/adhesive
sprays, stretch hooding, shrink hooding and strapping. The stretch
hooding seals the product from the top through a film and then stretches
it to the whole product body, seals the top and releases the stretch.
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