Fresh produce appears at its best when it can
be seen clearly; however, small water droplets frequently ruin that view within
a cold pack and as a result shoppers leave without making a purchase. A
solution to this problem is the Antifog
BOPP Film, which keeps the surface clear even when the cabinet is cold.
What
Causes Fogging
Vegetables, fruits, and baked goods emit warm,
moist air. On coming into contact with a cooler surface this forms droplets
that scatter light and thus create a cloudy appearance. As ordinary
polypropylene sheets are naturally water repellent, the droplets remain
spherical. In the case of a treated sheet the surface tension is reduced by
means of a special additive and the water spreads to form a thin transparent
layer.
Where
It Is Used
This substance is commonly used for packing
salads, herbs, and mushrooms, and coatings for bakery trays and sandwich wraps.
Mostly it is applied in cold storage rooms and supermarket displays as it
enhances visibility and allows staff to identify any spoilage. As customers
tend to trust what they can see many retail chains have asked for antifog
film.
Points to Remember
The treatment may be used on one side or on
both sides and the right side should be selected for the inner surface of the
pack. Before a grade is given, performance is tested at a number of different
temperatures. The heat sealing must be enacted at the correct settings to make
sure that the seals remain tight. Antifog BOPP Film is available in a variety of thicknesses so that
the weight of the pack can be adjusted. The rolls should be stored away from
direct sunlight and excessive heat. Guidance regarding the test data and shelf
life should be obtained from the supplier.
Closing Note
Packings that are clear and transparent are
noticed and selected; a slight change in material can result in a big increase
in sales. For any business which sells fresh products, antifog film is a
practical solution.
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