Materials + Properties + Examples

Paper, Board, Softwood, Hardwood, Manufactured board, ferrous metal, non-ferrous metal, polymerisation, thermosetting plastic, thermoplastic, quick test

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  • Created by: mp
  • Created on: 02-06-11 11:11
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ThermoPlastic Mayang Purwanto
Can be reshaped over and over,
with the use of heat
Hardens when cooled
Availble in sheets, granules, powder, rods, blocks
Thickness: Metric, eg. 1mm, 1.5mm, 3mm
Granules used for injection moulding
Powders used for dip coating
EXAMPLES
High Density Polyethylene (HDPE)
· Stiff, strong
· Softens at 120-130degrees
· For pipes, bowls, milk crates, buckets
Low density Polyethylene (LDPE)
· Cheap
· Weak
· Transparent/opaque
· For plastic bags
High Impact Polystyrene
· Lightweight
· Strong
· Available in sheets
· Softens at 95degrees
· For vacuum forming, school project casting
· Rather expensive
Polyethylene Terephthalate (PET)
· Polyester plastic
· Clear material
· For vacuum forming, blow moulding
· For drink bottles, food trays
Polyvinyl Chloride (PVC)
· Stiff, hard wearing
· Can add plasticiser,
create more softer/rubbery plastic
· For air/water pipes, chemical tanks, shrink/blister packaging
Polymethyl-Methacrylate (Acrylic)
· aka. Perspex

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· transparent/opaque plastic
· Can shatter when treated roughly
· Can be coloured with pigments
· For display signs, baths, roof lights, machine guards
Acetate
· Cellulose based plastic
· For wrapping…read more

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