5.2.2

Thermoforming Polymers

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Thermoforming Polymers

Thermoforming polymers can be reheated, reshaped, and recycled.

Acrylic (PMMA)

Acrylic (PMMA)

  • Properties:
    • Very clear, good optical quality.
    • Very good thermal insulator and chemical insulator.
    • Excellent resistance to weathering.
    • Scratches easily.
    • Brittle - snaps with pressure.
  • Examples:
    • Car headlights.
    • Baths.
    • Signs.
High impact polystyrene (HIPS)

High impact polystyrene (HIPS)

  • Properties:
    • Rigid.
    • Cheaper polymer.
    • Range of colours.
  • Examples:
    • Smoke detectors.
    • Vacuum forming.
High-density polyethylene (HDPE)

High-density polyethylene (HDPE)

  • Properties:
    • Difficult to bend.
    • Resists chemicals.
    • Excellent strength-to-weight ratio (SWR).
    • Good thermal and chemical insulator.
  • Examples:
    • Pop bottles.
    • Buckets.
    • Bowls.
    • Pipes.
Polypropylene (PP)

Polypropylene (PP)

  • Properties:
    • Lightweight.
    • Tough - withstands impact.
    • Very good thermal and chemical insulator.
    • Flexible.
    • Good tensile strength - difficult to stretch.
  • Example:
    • Food packaging.
    • Toys.
    • Chair seats.
    • Bottle tops.
Polyvinyl chloride (PVC)

Polyvinyl chloride (PVC)

  • Properties:
    • Tough - withstands impact.
    • Weather resistant.
    • Excellent tensile strength - difficult to stretch.
    • Rigid.
  • Examples:
    • Drain pipes.
    • Window frames.
    • Guttering.
Polyethylene terephthalate (PET)

Polyethylene terephthalate (PET)

  • Properties:
    • Lightweight.
    • Strong.
    • Tough - withstands impact.
  • Examples:
    • Clothing.
    • Clear pop bottles.
Jump to other topics
1

Core Technical Principles

2

Paper & Board: Specialist Technical Principles

3

Timber: Specialist Technical Principles

4

Metal: Specialist Technical Principles

5

Polymers: Specialist Technical Principles

6

Textiles: Specialist Technical Principles

7

Designing & Making Principles

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