Polypropylene is a clear glossy film with a high strength, and is puncture resistant
Low permeability to moisture, gases, and odors, which is not affected by changes in humidity.
Stretches, although less than polythene.
YGood resistance to oil, and therefore can be used successfully for packaging oily products.
Heat sealable, inert, odour-free, and shrinks when heated
Good moisture barrier, but has a relatively high gas permeability, sensitivity to oils, and poor odour resistance.
Less expensive than most films and is therefore widely used.
Stronger, thicker, less flexible, and more fragile than low-density polythene
Lower permeability to gases and moisture.
Higher softening temperature (121°C) and can therefore be heat sterilized.
The glossier film
Offers excellent appearance and has very good barrier properties.
Widely used in flexible packaging due to its mechanical and dimentional characteristics at high temperatures.
Laminated films are two or more films glued together
Improves the appearance, the barrier properties, or the mechanical strength of a package.
Aluminum foil is widely used in laminated combinations for most pharma and food products.