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Typically has higher melting point than PE so although still not “ovenable” it is better suited to hot • Polyvinylidene chloride (PVDC)
fill products. Resistant to a relatively wide range of chemicals. While normally only used in multi-layer films, PVDC has exceptional moisture and gas barrier

properties. Many pharmaceutical products could not be packed in blister strips without using
PVDC as a layer in the blister film.

Figure 6.6 Packaging material polypropylene

• Polyethylene terephthalate (PET)

Commonly used for stretch blown bottles containing drinks, toiletries and food, it has tremendous
clarity. Also used for jars, tubes and trays. By far the finest gas and moisture blockade of any
packaging plastic used for containers it is perfect for carbonated beverages. Its warm resistance
makes it fit for ovenable trays for ready meals. Figure 6.8 Packaging material PVDC

• Polystyrene (PS)
Chiefly seen in its expanded form as defensive mouldings for fragile products. Also obtainable
as moulded toiletries/cosmetics containers (compacts), some bottles, jars and cups. It has good
chemical resistance and excellent clarity although it can be colored.

Figure 6.7 packaging material PET

• Polyvinyl chloride (PVC)
Not extensively used even though only has a third of its content is resulting from oil. It still has a
strong presence in vacuum forming used for inserts, clam packs and blister packs, due to its good
production line performance. PVC films have outstanding stretch and cling properties for hand Figure 6.9 Packaging material polystyrene
wrapping new produce.