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Edistir® SR 550

High Impact Polystyrene

Supplied by Polimeri Europa

The technical datasheet with complete property values for Edistir® SR 550 is available to members of the Prospector Plastics Database.
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Product Description
High impact, easy flow polystyrene with good elasticity at low temperatures.

Suitable for injection moulding of large or complex parts with low thickness and high impact strength.

Designation: Thermoplastics ISO 2897-PS-I,M,083-12-07-18

Applications: Toys, housewares, technical items.

SR 550 is certified UL94 HB "all colors" at 1.5 mm (UL file E83071).

This grade in its natural version complies by composition with the requirements set by the main Regulations for plastic materials intended for food contact (including the EEC Directive 2002/72/CE and subsequent amendments).
General  
Material Status 
  • Commercial: Active
Availability 
  • Europe
  • North America
  
Features 
  • Food Contact Acceptable
  • Good Flow
  • High Elasticity
  • High Impact Resistance
  
Uses 
  • Electrical/Electronic Applications
  • Household Goods
  • Thin-walled Parts
  • Toys
  
Agency Ratings 
Appearance 
  • Natural Color
Forms 
  • Pellets
Processing Method 
  • Injection Molding
Multi-Point Data 
  • Isothermal Stress vs. Strain (ISO 11403-1)
  • Secant Modulus vs. Strain (ISO 11403-1)
  • Shear Modulus vs. Temperature (ISO 11403-1)
  • Specific Heat vs. Temperature (ISO 11403-2)
  • Specific Volume vs Temperature (ISO 11403-2)
  • Viscosity vs. Shear Rate (ISO 11403-2)
Physical
Nominal Value
Unit
Test Method
Density
g/cm³
 ISO 1183
Apparent Density
g/cm³
 ISO 60
Melt Mass-Flow Rate (MFR) (200°C/5.0 kg)
g/10 min
 ISO 1133
Molding Shrinkage
%
 Internal Method
Water Absorption (73°F, 24 hr)
%
 ISO 62
Mechanical
Nominal Value
Unit
Test Method
Tensile Modulus
psi
 ISO 527-2/1
Tensile Stress
     ISO 527-2/50
Yield
psi
  
Break
psi
  
Tensile Strain (Break)
%
 ISO 527-2/50
Flexural Strength 2
psi
 ISO 178
Impact
Nominal Value
Unit
Test Method
Notched Izod Impact
      
73°F, 0.126 in
ft·lb/in
 ISO 180/4A
-22°F 3
ft·lb/in²
 ISO 180/1A
73°F 3
ft·lb/in²
 ISO 180/1A
Hardness
Nominal Value
Unit
Test Method
Rockwell Hardness (L-Scale)
 
 ISO 2039-2
Thermal
Nominal Value
Unit
Test Method
Deflection Temperature Under Load (264 psi, Annealed)
°F
 ASTM D648
Vicat Softening Temperature
      
--
°F
 ISO 306/A50
--
°F
 ISO 306/B50
CLTE - Flow
in/in/°F
 ASTM D696
Thermal Conductivity
Btu·in/hr/ft²/°F
 ISO 8302
Electrical
Nominal Value
Unit
Test Method
Surface Resistivity
ohm
 IEC 60093
Volume Resistivity
ohm·cm
 IEC 60093
Dielectric Constant (50 Hz)
 
 IEC 60250
Dissipation Factor (50 Hz)
 
 IEC 60250
Comparative Tracking Index (Solution A)
V
 IEC 60112
Electric Strength
V/mil
 IEC 60243-1
Flammability
Nominal Value
Unit
Test Method
Flame Rating - UL (0.0591 in, All Colors)
 
 UL 94
Glow Wire Ignition Temperature (0.0630 in)
°F
 IEC 60695-2-13
UL File Number
 
  
Additional Information
Nominal Value
Unit
Test Method
Designation
 
  
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: Edistir® SR 550, Edistir SR 550, Edistir® , Edistir, EdistirSR550, SR 550, SR550, PS, Polystyrene, High Impact, Polystyrene High Impact, PS (HIPS), PS HIPS, Polystyrene, Polimeri Europa, PolystyreneHighImpact, PSHIPS, 550SR
Features
Features may also be described by the following terms: High Impact Resistance, Good Flow, High Elasticity, Highly Elastic.
Uses
Uses may also be described by the following terms: Household Goods, Housewares, Thin-walled Parts, Thin Walled Parts, Thin-wall Parts, Thin wall Parts, Thinwall Parts, Electrical Applications, Electronic Applications, Electrical/Electronic Applications, Electrical Sector.
Agency Ratings
This plastic material has 1 certifications from the following agencies (the number in parentheses shows the number of certifications for that agency): EU (1).
Injection
Nominal Value
Unit
 
Processing (Melt) Temp
°F
  
Mold Temperature
°F
  
Injection Notes
Predrying normally not required
Notes
1Typical properties: these are not to be construed as specifications.
20.079 in/min
34mm
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.