PS (optical grade) – Polystyrene (optical grade)


PS is a low-cost thermoplastic that is clear and amorphous. It has low impact‑resistance, which makes it suitable for indoor use only. It has good thermoforming properties. It is also available with various surface textures. We deliver PS as plastic sheets.

Physical properties
  Value Unit Test method
Specific gravity 1.05 g/cm3 DIN EN ISO 1183
Average molecular mass N/A
Water absorption, 24/96 h (23 °C) N/A
Weather-resistance poor
Combustibility HB UL 94 DIN EN ISO 527-2
Food safety no
Mechanical properties
  Value Unit Test method
Modulus of elasticity 3400 MPa DIN EN ISO 527-2
Tensile strength 45 MPa DIN EN ISO 527-2
Elongation at break N/A
Tensile strength at break 3 % DIN EN ISO 527-2
Flexural modulus 3450 MPa DIN EN ISO 178
Flexural strength 85 MPa DIN EN ISO 178
Compressive modulus N/A
Compressive strength, 1%/2% N/A
Impact strength (Charpy) N/A
Notch impact strength (Charpy) 6 kJ/m2 DIN EN ISO 179-1eA
Notch impact strength (Izod) kJ/m2 DIN EN ISO 180/2A
Toughness (ball pressure) N/A
Toughness (Shore D) N/A
Wear-resistance N/A
Coefficient of friction (against steel) N/A
Thermal properties
  Value Unit Test method
Glass-transition temperature N/A
Melting point 280 °C DIN 53765
Operating temperature (instantaneous) +80 °C
Operating temperature (continuous) 65 °C
Operating temperature (minimum) °C
Thermal expansion coefficient, 23–60 °C 8 10-5 K-1 DIN EN ISO 11359-1;2
Thermal expansion coefficient, 23–100 °C N/A
Specific heat capacity 1.8 J/(g×K) ISO 22007-4:2008
Thermal conductivity 0.16 W/(m×K) ISO 22007-4:2008
Electrical properties
  Value Unit Test method
Surface resistivity 1014 DIN IEC 60093
Resistivity 1014 Ω×cm DIN IEC 60093
Dielectric strength N/A
CTI value N/A
Optical properties
  Value Unit Test method
Light transmittance 89
Refractive index 1.59
Optical errors N/A
Abrasion-resistance, 100 rotations with 500 g N/A

Additional downloads

Delivery selection plastic sheets
Specific gravity 1.05 g/cm3
Service temperature 0 … 65 °C
Price category € (€3–7/kg)

Special properties

  • cost-efficiency
  • suitability for thermoforming
  • brittleness at low temperatures
  • non-suitability for outdoor use


shower cubicle walls and signposts, glazing for picture frames, parts produced via vacuum forming, display boards, printed signs

Standard colours


Special colours

upon special request

Premade pieces


Commonly known brands

Nudec PS, Polycasa PS, Quinn PS, senosan®

Further information

Note: Anti-static grades are available.