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Polystyrene PS
a) General Purpose gpPS amorphous styrenic
APPLICATIONS
Toys and novelties, rigid packaging, refrigerator trays and boxes, cosmetic packs and costume jewellery, lighting diffusers, audio cassette and CD cases.
PROPERTIES
Brittle, rigid, transparent, low shrinkage, low cost, excellent X-ray resistance, free from odour and taste
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Psysical properties: |
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Tensile Strength |
40 - 55 |
MPa |
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E-modulus |
3200 |
MPa |
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Notched Impact Strength |
2.0 - 2.5 |
kJ/m² |
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Thermal Coefficient of expansion |
80 |
x 10-6 |
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Max Cont Use Temp |
70 - 85 |
0C |
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VicatB Temp |
70 - 85 |
0C |
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Density |
1.05 |
g/cm³ |
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Resistance to chemicals: |
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Dilute Acid |
Good (Variable) |
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Dilute Alkalis |
Very good |
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Oils and Greases |
Good (Variable) |
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Aliphatic Hydrocarbons |
Very good |
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Aromatic Hydrocarbons |
Poor |
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Halogenerated Hydrocarbons |
Poor |
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Alcohols |
Moderate (Variable) |
b)High Impact, hiPS amorphous styrenic
APPLICATIONS
Yoghurt pots, refrigerator linings, vending cups, bathroom cabinets, toilet seats and tanks, closures, instrument control knobs.
PROPERTIES
Hard, rigid, translucent, impact strength up to 7 x gpPS, other properties similar.
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Psysical properties: |
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Tensile Strength |
35 - 45 |
MPa |
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Notched Impact Strength |
10.0 - 20.0 |
kJ/m² |
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Thermal Coefficient of expansion |
80 |
x 10-6 |
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Max Cont Use Temp |
60 - 80 |
0C |
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Density |
1.03 - 1.06 |
g/cm³ |
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Resistance to chemicals: |
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Dilute Acid |
Moderate |
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Dilute Alkalis |
Very good |
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Oils and Greases |
Moderate |
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Aliphatic Hydrocarbons |
Very good |
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Aromatic Hydrocarbons |
Poor |
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Halogenerated Hydrocarbons |
Poor |
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Alcohols |
Poor (Variable) |
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