Polystyrene Products

3D render — PETRO STELLAR product media library

PETRO STELLAR supplies a full range of Polystyrene (PS) products including GPPS, HIPS and EPS raw material (beads) for a wide range of industrial and consumer applications. All grades are produced in modern facilities, comply with international standards and are supplied with Product Data Sheet (PDS), contract specification and Certificate of Analysis (COA).

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Consistent Quality

Consistent quality and performance across grades.

Wide Range

Competitive pricing, reliable supply and flexible packaging.

Technical Support

After-sales service and application development support.

Applications

Disposable cups, plates and cutlery
Food packaging (transparent)
Stationery and office supplies
Electrical & electronic housings
Display items and sign holders
Medical and laboratory products
Appliance housings & liners
Automotive interior parts
Thermal insulation panels and blocks
Protective packaging for electronics
Fish boxes and cold chain containers
Lightweight construction blocks (ICF)

Key Benefits

Consistent quality and performance
Wide range of grades and applications
Competitive pricing and reliable supply
Flexible packaging and delivery options
Technical support and after-sales service

A. GPPS — General Purpose Polystyrene (Typical / Reference)

Property	Typical / Reference Value	Test Method
Melt Flow Rate (200 °C / 5 kg)	1 – 10 g/10 min	ASTM D1238
Density	1.04 – 1.06 g/cm³	ASTM D792
Tensile Strength at Yield	30 – 55 MPa	ASTM D638
Elongation at Break	1 – 3 %	ASTM D638
Flexural Modulus	2.5 – 3.5 GPa	ASTM D790
Izod Impact Strength (23 °C)	15 – 45 J/m	ASTM D256
Vicat Softening Temp. (VST, 1 kg)	90 – 100 °C	ASTM D1525
Heat Deflection Temp. (HDT, 1.8 MPa)	70 – 88 °C	ASTM D648
Ash Content	≤ 0.05 %	ISO 3451-1
Moisture Content	≤ 0.10 %	ASTM D6980
Appearance	Clear, free-flowing granules	Visual

⚠ Values are typical for representative grades only and are not intended as product specifications. Measured on injection molded specimens where applicable.

B. HIPS — High Impact Polystyrene (Typical / Reference)

Property	Typical / Reference Value	Test Method
Melt Flow Rate (200 °C / 5 kg)	2 – 12 g/10 min	ASTM D1238
Density	1.04 – 1.06 g/cm³	ASTM D792
Tensile Strength at Yield	20 – 28 MPa	ASTM D638
Elongation at Break	20 – 60 %	ASTM D638
Flexural Modulus	1.6 – 2.4 GPa	ASTM D790
Izod Impact Strength (23 °C)	80 – 300 J/m	ASTM D256
Vicat Softening Temp. (VST, 1 kg)	88 – 98 °C	ASTM D1525
Heat Deflection Temp. (HDT, 1.8 MPa)	68 – 82 °C	ASTM D648
Ash Content	≤ 0.05 %	ISO 3451-1
Moisture Content	≤ 0.10 %	ASTM D6980
Appearance	White / Natural granules	Visual

⚠ Values are typical for representative grades only and are not intended as product specifications.

C. EPS — Expandable Polystyrene (Raw Material – Beads)

Property	Typical / Reference Value	Test Method
Bead Size (Diameter)	0.6 – 2.0 mm	Internal Method
Bulk Density (Beads)	10 – 25 kg/m³	ASTM D6817
Pentane Content	5.0 – 7.5 wt%	Internal Method
Moisture Content	≤ 1.0 wt%	ASTM D570
Volatile Matter	≤ 1.5 wt%	ASTM D3030
Ash Content	≤ 0.05 wt%	ISO 3451-1
Melting Point	95 – 105 °C	ASTM D3418
Achievable Bulk Density after Pre-expansion	Seller PDS / Grade Dependent	Internal Method
Appearance	White beads, free-flowing	Visual

⚠ Values apply to EPS raw material (beads) prior to expansion. Properties of expanded EPS foam depend on processing conditions, bead density and application — refer to ASTM C578 (Type I–V).

Supply & Logistics

25 kg Bags (PE/PP Woven).
Big Bags (1,000 kg).
Octabins / Boxes (for EPS).
Packaging options are grade, origin, and contract dependent.

Standards & Compliance

ASTM D1238, D792, D638, D790, D256, D1525, D648, D6980; ISO 3451-1.
EPS: ASTM D6817, D570, D3030, D3418; expanded foam properties per ASTM C578 (Type I–V).
RoHS / REACH Compliance (on request).

Quality Assurance

Product Data Sheet (PDS).
Certificate of Analysis (COA).
Safety Data Sheet (SDS).
Packing List and other documents as per contract.

Storage & Handling

Store in a cool, dry, well-ventilated area.
Keep away from direct sunlight and heat sources.
Protect from moisture and contamination.
Keep away from strong oxidizing agents and open flames.

Polystyrene Products