Edistir® R 850E is a super high impact polystyrene with good heat resistance.Designed for sheet extrusion and thermoforming of deep drawn containers even diluted with high percentage of GP.Suitable for general injection molding of tough medium-walled articles.Designation: Thermoplastics ISO 2897-PS-I,G,O93-O3-10-18ApplicationsTypical uses are thermoformed food packaging as disposable tumblers, flatwares, yogurt cups, lids. Injection molding of technical items, shoe heels, reels.
Polymer Name: High Impact Polystyrene (HIPS)
Processing Methods: Profile Extrusion, Extrusion, Film Extrusion, Thermoforming, Blow Molding, Injection Molding
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TypeDocument Name
Technical Data Sheet
Edistir® R 850E Technical Data Sheet
Edistir® R 850E Technical Data Sheet
Technical Data SheetKnowde Enhanced TDS
Identification & Functionality
Chemical Family
Polymer Name
Plastics & Elastomers Functions
Technologies
Product Families
Edistir® R 850E Features & Benefits
Labeling Claims
Applications & Uses
Markets
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Properties
Flame Rating
Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Strain at Break (50mm/min) | 70 | % | ISO 527 |
| Tensile Stress at Break (50mm/min) | 28 | MPa | ISO 527 |
| Tensile Stress at Yield (50mm/min) | 21 | MPa | ISO 527 |
| Flexural Strength (2mm/min) | 38 | MPa | ISO 178 |
| Rockwell Hardness (L/M) | L65 | - | ISO 2039/2 |
| Tensile Modulus (1mm/min) | 1900 | MPa | ISO 527 |
| Izod Impact Strength (Notched, -30°C, 4mm) | 6.5 | kJ/m² | ISO 180/1A |
| Izod Impact Strength (Notched, 23°C, 4mm) | 10 | kJ/m² | ISO 180/1A |
| Izod Impact Strength (Notched, 23°C, 3.2mm) | 125 | J/m | ISO 180/4A |
Typical Properties
| Value | Units | Test Method / Conditions | |
| Water Absorption (24h, 23°C) | max. 0.1 | % | ISO 62 |
| Density | 1.04 | g/cm³ | ISO 1183 |
| Bulk Density | 0.65 | g/cm³ | ISO 60 |
Thermal Properties
| Value | Units | Test Method / Conditions | |
| Coefficient of Linear Thermal Expansion | 9×10⁻⁵ | /°C | ASTM D 696 |
| Thermal Conductivity | 0.17 | W/(K·m) | ISO 8302 |
| Moulding Shrinkage | 0.4 - 0.7 | % | ISO 294/4 |
| Deflection Temperature Under Load (Annealed, 1.82MPa, 120°C/h) | 85 | °C | ISO 75 A |
| Vicat Softening Temperature (50N, 50°C/h) | 91 | °C | ISO 306/B |
| Vicat Softening Temperature (10N, 50°C/h) | 99 | °C | ISO 306/A |
Electrical Properties
| Value | Units | Test Method / Conditions | |
| Dielectric Constant (Relative Permittivity, 50Hz) | 2.5 | - | IEC 60250 |
| Dissipation Factor (50Hz) | 0 | - | IEC 60250 |
| Comparative Tracking Index (CTI, Sol. A) | 500 | - | IEC 60112 |
| Surface Resistivity | min. 1.5×10¹⁵ | ohm | IEC 60093 |
| Volume Resistivity | min. 7×10¹⁵ | ohm·cm | IEC 60093 |
| Dielectric Strength | 65 | kV/mm | IEC 60243 |
Flammability
| Value | Units | Test Method / Conditions | |
| Flame Behaviour (1.5mm) | HB | cl. | UL 94 |
| Glow Wire Test (GWT, 1.6mm) | 650 | °C | IEC 60695-2-10 |
Rheological Properties
| Value | Units | Test Method / Conditions | |
| Melt Flow Rate (200°C, 5kg) | 4 | g/10' | ISO 1133 |
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Edistir® R 850E
Versalis - A subsidiary of Eni S.p.A