STYRENE ACRYLONITRILE COPOLYMER (SAN)
Description
A transparent material with a yellow tint that offers improved properties to polystyrene.
Properties
The addition of the acrylonitrile gives better resistance to oils and greases than polystyrene. There is also improved stress cracking and crazing resistance, enhanced impact strength and a higher heat distortion temperature.
Colouring
SAN is usually supplied in the transparent or tinted form. Although it can be coloured using masterbatches it is sometimes difficult to obtain even colour dispersion. For this reason, if a specific colour is required it is generally supplied compounded.
Resistance
|
Mineral Acids (dilute) |
J |
|
Mineral Acids (concentrated) |
J |
|
Alkali |
J |
|
Alcohol |
L |
|
Ketone |
L |
|
Aromatic Hydrocarbon |
L |
|
Chlorinated Hydrocarbon |
L |
|
Detergents |
J |
|
Oils, Greases |
J |
Finishing
Mouldings may be bonded to each other using solvents, the type of solvent to be used will depend on the acrylonitrile content. May be hot shoe, spin or ultrasonically welded. Can be easily printed.
Applications
With the addition of UV stabilisers the material may be used in outdoor applications, for example automotive rear lamp covers and reflectors. As this material has better resistance to temperature fluctuations than polystyrene it is used for high quality kitchen utensils. Widely used in a range of domestic appliances such as refrigerator doors and trays and washing machine trims and windows.
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