Product Overview
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 manufacture of housewares, food containers, toys, office stationery, electrical appliances, hangers, IT equipment, disposables, egg boxes, vending cups, cutlery items, cosmetic boxes, lamp shields, XPS boards, PS foam products, clear boxes, and other types of enclosures.
Transparent
Rigid
Food-Safe
FDA Approved
11 Grades Available
Injection & Extrusion Grades
Applications
Major Applications
Technical Data
GPPS Specifications (ASTM)
| GPPS — Typical Properties | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Property | ASTM | GP-525 | GP-525(N) | GP-500N | GP-560 | GP-565 | GP-525X | GP-550P | GP-550P(N) | GP-550P(LM) | GP-550S | GP-570 |
| Tensile Strength (Kgf/cm²) | D-638 | 400 | 400 | 400 | 350 | 340 | 430 | 430 | 430 | 430 | 430 | 330 |
| Tensile Modulus (Kgf/cm²) | D-638 | 30000 | 30000 | 30000 | 30000 | 32000 | 30000 | 28000 | 28000 | 28000 | 28000 | 25000 |
| Tensile Elongation (%) | D-638 | 1.2 | 1.2 | 1.2 | 0.9 | 0.75 | 1.2 | 1.5 | 1.5 | 1.5 | 1.5 | 1.0 |
| Flexural Strength (Kgf/cm²) | D-790 | 750 | 750 | 750 | 600 | 560 | 900 | 920 | 920 | 920 | 920 | 500 |
| Flexural Modulus (Kgf/cm²) | D-790 | 34000 | 34000 | 34000 | 34000 | 30000 | 34000 | 32000 | 32000 | 32000 | 32000 | 24000 |
| Izod Impact Strength (Kg-cm/cm) | D-256 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Vicat Softening Temp (°C) | D-1525 | 95 | 95 | 95 | 90 | 90 | 100 | 100 | 100 | 100 | 100 | 90 |
| Heat Distortion Temp (°C) | D-648 | 85 | 85 | 85 | 80 | 80 | 85 | 90 | 90 | 90 | 90 | 80 |
| Specific Gravity | D-792 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 | 1.05 |
| Melt Flow Index (g/10min) | D-1238 | 7 | 7 | 9 | 12 | 16.5 | 8 | 3 | 3 | 2 | 2.8 | 22.0 |
| Product Description | Injection | Injection | Injection | Injection | Injection | Extrusion | Extrusion | Extrusion | Extrusion | Extrusion | Injection | |
Grade Guide
Grades, Characteristics & Applications
| Grade | Characteristics | Applications |
|---|---|---|
| GP-525 | Blue tinted, excellent clarity, good flow, low volatility | Housewares, containers, disposable cutlery, refrigerator parts, toys, drinking cups, stationery, razors, hangers, cosmetic casings, auto lamp covers |
| GP-525(N) | Light blue tinted, excellent clarity, good flow, low volatility | Housewares, containers, disposable cutlery, refrigerator parts, toys, drinking cups, CD casings, stationery, hangers |
| GP-500N | Natural tinted, excellent clarity, good flow, low volatility | Housewares, containers, cutlery, refrigerator parts, toys, cups, jewellery boxes, stationery, hangers |
| GP-560 | Blue tinted, excellent clarity, good flow, low volatility | Housewares, containers, toys, stationery, water filter bottles, drinking cups, thin-wall applications |
| GP-565 | Blue tinted, excellent clarity, high flow, low volatility | Housewares, containers, toys, stationery, drinking cups, thin-wall applications |
| GP-525X | No internal lubricant, blue tinted, excellent clarity, good flow, low volatility | XPS insulation boards, PSP foam products |
| GP-550P | Blue tinted, excellent clarity, good flow, low volatility | PSP foam products, XPS insulation boards |
| GP-550P(N) | Natural tinted, excellent clarity, high flow, low volatility | Extruded sheet, crystal-clear sheets for photo frames, door & window panels |
| GP-550P(LM) | Blue tinted, excellent clarity, low volatility | XPS sheets |
| GP-550S | Blue tinted, excellent clarity, good flow, low volatility | PSP foam products, XPS insulation boards |
| GP-570 | Blue tinted, excellent clarity, excellent flow, low volatility | Spoons, forks, knives, ballpoint pen barrels, drinking cups, multiple-cavity moulds, thin-wall applications |