API PS 425

Category: PS (MIPS) , Medium Impact Polystyrene
Manufacturer: American Polymers, Inc.
Trademark: API PS
Fillers: -
Ports: Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms FOB, CIF, DAP, DAT, DDP
PDF: Sb80R3_API-PS-425.pdf
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API 425 is a medium impact grade of polystyrene for injection molding. API 425 has good gloss, easy flow, and fast cycling properties,

Application: API 425 is widely used in cosmetic packaging, food packaging, cassettes, caps, and closures.
General Information
Features
  • Fast Molding Cycle
  • Good Flow
  • Medium Gloss
  • Medium Impact Resistance
Uses
  • Audio Tapes
  • Caps
  • Closures
  • Cosmetic Packaging
  • Food Packaging
Forms
  • Pellets
Processing Method
  • Injection Molding
PhysicalNominal ValueUnitTest Method
Specific Gravity 1.04g/cm³ASTM D792
Melt Mass-Flow Rate (MFR) (200°C/5.0 kg)8.0g/10 minASTM D1238
HardnessNominal ValueUnitTest Method
Rockwell Hardness (L-Scale)48ASTM D785
MechanicalNominal ValueUnitTest Method
Tensile Modulus 1930MPaASTM D638
Tensile Strength (Break)33.1MPaASTM D638
Tensile Elongation (Break)24%ASTM D638
Flexural Modulus 2100MPaASTM D790
ImpactNominal ValueUnitTest Method
Notched Izod Impact (3.18 mm, Injection Molded)53J/mASTM D256
ThermalNominal ValueUnitTest Method
Deflection Temperature Under Load (1.8 MPa, Annealed)87.2°CASTM D648
Vicat Softening Temperature 94.4°CASTM D1525
InjectionNominal ValueUnit
Drying Temperature 71.1 to 82.2°C
Drying Time 2.0hr
Suggested Max Regrind 30%
Rear Temperature 177 to 232°C
Front Temperature 191 to 274°C
Mold Temperature -6.67 to 71.1°C
Injection Pressure 34.5 to 276MPa
Back Pressure 0.0689 to 3.45MPa
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