Pastics in packaging
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Contents
Introduction ....................................................2
Types of plastics packaging...........................................3
Polymers used in packaging.......................................3
Polyethylene (PE)...............................................4
Polypropylene (PP).....................................4
Poly(ethylene terephthalate) (PET)......................................4
Polystyrene (PS) ..............................................5
Poly(vinyl chloride) (PVC)..........................................5
Polycarbonate (PC) .................................................5
Ethylene/vinyl alcohol (E/VAL)..........................................5
Using different polymers in combination...........................6
Using plastics with other materials..................................7
Active packaging .............................................8
Polymer identification symbols.....................................8
Developments in polymerisation catalysts..................................10
Transformation processes .......................................11
Extrusion ..........................................11
Extrusion blow moulding ...........................................12
Injection moulding .........................................13
Injection blow moulding ............................................14
Stretch blow moulding..................................15
Compression moulding.....................................15
Thermoforming ........................................16
Cast film....................................16
Calendering .............................................17
Blown film......................................17
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