Polypropylene (PP)

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.

Polythene Low-density (LDPE)

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.

High-density polythene (HDPE)

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.

Polyester (PET)

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

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.