Edistir® R 850E

1 of 19 products in this brand
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: Blow Molding, Extrusion, Film Extrusion, Injection Molding, Profile Extrusion, Thermoforming

Technical Data Sheet

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Properties

Flame Rating
Physical Form
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strain at Break (50mm/min)70%ISO 527
Tensile Stress at Break (50mm/min)28MPaISO 527
Tensile Stress at Yield (50mm/min)21MPaISO 527
Flexural Strength (2mm/min)38MPaISO 178
Rockwell Hardness (L/M)L65ISO 2039/2
Tensile Modulus (1mm/min)1900MPaISO 527
Izod Impact Strength (Notched, -30°C, 4mm)6.5kJ/m²ISO 180/1A
Izod Impact Strength (Notched, 23°C, 4mm)10kJ/m²ISO 180/1A
Izod Impact Strength (Notched, 23°C, 3.2mm)125J/mISO 180/4A
Typical Properties
ValueUnitsTest Method / Conditions
Water Absorption (24h, 23°C)max. 0.1%ISO 62
Density1.04g/cm³ISO 1183
Bulk Density0.65g/cm³ISO 60
Thermal Properties
ValueUnitsTest Method / Conditions
Coefficient of Linear Thermal Expansion9×10⁻⁵/°CASTM D 696
Thermal Conductivity0.17W/(K·m)ISO 8302
Moulding Shrinkage0.4 - 0.7%ISO 294/4
Deflection Temperature Under Load (Annealed, 1.82MPa, 120°C/h)85°CISO 75 A
Vicat Softening Temperature (50N, 50°C/h)91°CISO 306/B
Vicat Softening Temperature (10N, 50°C/h)99°CISO 306/A
Electrical Properties
ValueUnitsTest Method / Conditions
Dielectric Constant (Relative Permittivity, 50Hz)2.5IEC 60250
Dissipation Factor (50Hz)0IEC 60250
Comparative Tracking Index (CTI, Sol. A)500IEC 60112
Surface Resistivitymin. 1.5×10¹⁵ohmIEC 60093
Volume Resistivitymin. 7×10¹⁵ohm·cmIEC 60093
Dielectric Strength65kV/mmIEC 60243
Flammability
ValueUnitsTest Method / Conditions
Flame Behaviour (1.5mm)HBcl.UL 94
Glow Wire Test (GWT, 1.6mm)650°CIEC 60695-2-10
Rheological Properties
ValueUnitsTest Method / Conditions
Melt Flow Rate (200°C, 5kg)4g/10'ISO 1133

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