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Polystyrene (General Purpose) GPPS
APPLICATIONS
Toys and novelties, rigid packaging, refrigerator trays and boxes, cosmetic packs and costume jewellery, lighting diffusers, audio cassette and CD cases.
PHYSICAL PROPERTIES
Tensile Strength 2.30 - 3.60 N/mm²
Notched Impact Strength 2.0 - 2.5 Kj/m²
Thermal Coefficient of expansion 80 x 10-6
Max Cont Use Temp 70 - 85 oC
Density 1.05 g/cm3
RESISTANCE TO CHEMICALS
Dilute Acid *** variable
Dilute Alkalis ****
Oils and Greases *** variable
Aliphatic Hydrocarbons ****
Aromatic Hydrocarbons *
Halogenated Hydrocarbons *
Alcohols ** variable
KEY * poor ** moderate *** good **** very good
PROPERTIES
Brittle, rigid, transparent, low shrinkage, low cost, excellent X-ray resistance, free from odour and taste, easy to processPHYSICAL PROPERTIES
Tensile Strength 2.30 - 3.60 N/mm²
Notched Impact Strength 2.0 - 2.5 Kj/m²
Thermal Coefficient of expansion 80 x 10-6
Max Cont Use Temp 70 - 85 oC
Density 1.05 g/cm3
RESISTANCE TO CHEMICALS
Dilute Acid *** variable
Dilute Alkalis ****
Oils and Greases *** variable
Aliphatic Hydrocarbons ****
Aromatic Hydrocarbons *
Halogenated Hydrocarbons *
Alcohols ** variable
KEY * poor ** moderate *** good **** very good
CURRENT CASE STUDIES
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Highly transparent cases made from crystal polystyrene. High transparency, low cost and easy mouldability have established its supremacy in presentation packing. |
