Plastic Packaging

About Plastic Packaging

There are 2 categories of plastic based on behavior when exposed to heat:-

  • A plastic which is soft and moldable when heated (say to 200ºC) is called a thermoplastic, meaning it becomes easily shaped, plasticine-like, with heat.
  • A plastic material which does not soften or become moldable with heat and only chars (decomposes) is called a thermoset material meaning it is ‘set’ despite the action of heat.

Uses

  • ​Plastic bags: flat, gusseted, plain, vest type carriers, printed, from small bags to sack and drum liners, and to big-bag liners, all with bottom seal or side seal welds.
  • Film products: shrink film, stretch film, release film, wrapping film and tubing, and lamination films, all plain, printed or reverse printed.
  • Coextruded film: gas and vapour barrier packaging, super tough bags, non-slip stackable bags.
  • Tapes and yarns: Woven bags, knitted sacks, woven sheeting and multicolored shade cloth.
  • Injection moulding: crates, tubs, large and small and containers
  • Blow moulding: bottles and drums from 50 ml perfume containers to large 200litre industrial drums
  • Vacuum forming: tubs, containers, chocolate liners and, more recently, PP microwaveable packaging

Properties

Advantages

  • Durable (depends on tensile strength)
  • Cost efficient

Disadvantages

  • Most plastics are not biodegradable therefore has a high environmental impact
  • Plastics easily absorb flavors