Styrenix

GPPS PS 133 GR21

GPPS PS 133 GR21 (also known as Styrenix) is a General Purpose Polystyrene (GPPS) grade.
Suitable for: Disposable cutlery, cups, and packaging trays, CD/DVD cases, Refrigerator door liners, School stationery (rulers, pen casings).
Key properties: MFI 1133 g/10min @ 200 °C/5 kg | Tensile Strength 48 MPa | HDT 85°C at 1.8 MPa.
GradePS 133 GR21
MaterialGPPS
MFIMVR 6 cm³/10min @ 200°C/5kg
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Material Snapshot

Grade
PS 133 GR21
Material Type
GPPS
Manufacturer
Styrenix
Brand
Styrenix
Density
1.046 g/cm³
MFI
MVR 6 cm³/10min @ 200°C/5kg
Supply Form
Granules

Applications

  • Disposable cutlery, cups, and packaging trays
  • CD/DVD cases
  • Refrigerator door liners
  • School stationery (rulers, pen casings)
  • Transparent display boxes
  • Lighting diffusers
  • Cosmetic containers

Key Features

  • Crystal clear optical transparency
  • High rigidity and stiffness
  • Easy to process and thermoform (MFI: 1133 g/10min @ 200 °C/5 kg)
  • Good dimensional stability
  • Cost-effective general purpose grade

Mechanical Properties

Impact Strength
Charpy notched: 3 kJ/m²; Charpy unnotched: 16 kJ/m²
Tensile Strength
48 MPa (yield)
Tensile Modulus
3200 MPa
Flexural Strength
98 MPa
Rockwell Hardness
Ball indentation 150 MPa

Thermal & Processing

Heat Deflection Temperature
85°C at 1.8 MPa
Vicat Softening Temperature
94°C
Melt Temperature Range
Melt: 180 - 260°C / Mold: 10 - 60°C
Processing Temp
Melt: 180 - 260°C / Mold: 10 - 60°C

Performance Properties

Electrical Properties
Dielectric strength: 135 kV/mm; Volume resistivity: >1E16 Ohm·m; Relative permittivity: 2.5
Water Absorption
<0.1% (saturated, 23°C)
Mold Shrinkage
0.3–0.6%

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