General Purpose Polystyrene


General purpose Polystyrene (GPPS) is produced by the polymerization of styrene monomer. It is a transparent solid product manufactured in the form of 2-5 mm pellets.

It is generally used in the manufacturing of housewares, food containers, toys, office stationery, electrical appliances, hangers, IT equipment, Disposable, Eggs boxes, Vending cups, cutlery items, cosmetic boxes, lamp shield, XPS boards, PS foam products, clear boxes and other types of enclosures. Some major applications are:

GPPS - Specification
Typical Properties ASTM Test Units GP-550 P GP-550 S GP-525 X GP-525 GP-500 N GP-560 GP-565
Tensile Strength D-638 Kgf/cm2 450 450 430 410 400 350 340
Tensile Modulus D-638 Kgf/cm2 28000 28000 30000 30000 30000 30000 32000
Tensile Elongation D-638 % 1.2 1.5 1.2 1.2 1.2 0.9 0.75
Flexural Strength D-790 Kgf/cm2 920 920 900 750 750 650 560
Flexural Modulus D-790 Kgf/cm2 32000 32000 34000 34000 34000 34000 30000
Izod Impact Strength D-256 Kg-cm/cm 1.5 1.5 1.5 - - - -
Vicat Softening Temp. D-1525 100 100 100 95 95 90 90
Heat Distoration Temp. D-648 90 90 85 85 85 80 80
Specific Gravity D-792 23/23 ℃ 1.05 1.05 1.05 1.05 1.05 1.05 1.05
Gloss D-523 % - - - - - - -
Melt Flow Index D-1238 gm/10min 3.0 2.8 8.0 7.0 9.0 12.0 17.0
Product Description Extrusion Grade Extrusion Grade Extrusion Grade Injection Grade Injection Grade Injection Grade Injection Grade
Grades Characteristics Applications
GP-550 P Blue Tinted, Excellent Clarity, Good Flow, Low Volatility. PSP Foam Products and XPS Insulation Boards etc.
GP-550 S Blue Tinted, Excellent Clarity, Good Flow, Low Volatility. PSP Foam Products and XPS Insulation Boards etc.
GP-525 X No Internal Lubricant, Blue Tined, Excellent Clarity,Good Flow, Low Volatility. XPS Insulation Boards and PSP Foam Products etc.
GP-525 Blue Tinted, Excellent Clarity, Good Flow, Low Volatility. House Ware, Containers, Disposable Cutlery, Plastic Refrigerator Parts, Toys, Drinking Cups, Stationery Items, CD Casing, Disposable Razors, Plastic Hangers.Water Filter Shell,Tooth Bushes and Cosmetic Casings etc.
GP-500 N Natural Tinted, Excellent Clarity, Good Flow, Low Volatility. House Ware, Containers, Disposable Cutlery, Plastic Refrigerator Parts, Toys, Drinking Cups, Stationery Items, CD Casing, Disposable Razors, Plastic Hangers.Water Filter Shell,Tooth Bushes and Cosmetic Casings etc.
GP-560 Blue Tinted, Excellent Clarity, Good Flow, Low Volatility. House Ware, Containers, Toys, Stationery Items, Water Filter Bottle, Drinking Cups and Thin Wall Applications etc.
GP-565 Blue Tinted, Excellent Clarity, High Flow, Low Volatility. House Ware, Containers, Toys, Stationery Items, Drinking Cups and Thin Wall Applications etc.
For complete data sheet of every product check below links:

GP-550 P GP-550 S GP-525 X GP-525 GP-500 N GP-560 GP-565
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