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STYRON™ 438

High Impact Polystyrene Resin

Supplied by Styron LLC

The technical datasheet with complete property values for STYRON™ 438 is available to members of the Prospector Plastics Database.
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Product Description
STYRON™ 438 is a high-impact polystyrene resin with good flow, excellent stiffness, high heat and impact resistance. It is designed for injection molding applications.

Main Characteristics:
  • High heat
  • Good balance of toughness and stiffness

Complies with:
  • U.S. FDA 21 CFR 177.1640
  • Consult the resulations for complete details.

Applications:
  • Printers
  • Food containers
  • Household goods
General  
Material Status 
  • Commercial: Active
Availability 
  • Asia Pacific
Agency Ratings 
 
Forms 
  • Pellets
Processing Method 
  • Injection Molding
Physical
Nominal Value
Unit
Test Method
Specific Gravity
 
 ASTM D792
Melt Mass-Flow Rate (MFR) (200°C/5.0 kg)
g/10 min
 ASTM D1238
Molding Shrinkage - Flow
in/in
 ASTM D955
Mechanical
Nominal Value
Unit
Test Method
Tensile Strength
     ASTM D638
Yield, Injection Molded
psi
  
Ultimate, Injection Molded
psi
  
Tensile Elongation (Break, Injection Molded)
%
 ASTM D638
Flexural Modulus (Injection Molded)
psi
 ASTM D790
Flexural Strength (Injection Molded)
psi
 ASTM D790
Impact
Nominal Value
Unit
Test Method
Notched Izod Impact (73°F)
ft·lb/in
 ASTM D256
Thermal
Nominal Value
Unit
Test Method
Deflection Temperature Under Load
     ASTM D648
264 psi, Unannealed
°F
  
264 psi, Annealed
°F
  
Vicat Softening Temperature
°F
 ASTM D1525
CLTE - Flow
in/in/°F
 ASTM D696
Flammability
Nominal Value
Unit
Test Method
Flame Rating - UL 2 (0.0591 in)
 
 UL 94
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: STYRON™ 438, STYRON 438, STYRON™ , STYRON, STYRON438, 438, PS, Polystyrene, High Impact, Polystyrene High Impact, PS (HIPS), PS HIPS, Polystyrene, PolystyreneHighImpact, PSHIPS
Agency Ratings
This plastic material has 2 certifications from the following agencies (the number in parentheses shows the number of certifications for that agency): FDA (1), UL (1).
Notes
1Typical properties: these are not to be construed as specifications.
2This rating not intended to reflect hazards presented by this or any other material under actual fire conditions.
 
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.