Pmma properties data sheet _ gehr
- 1. Technical Data Sheet GEHR PMMA I. Physical Properties Test method Unit Value 1. Specific gravity (ρ) ISO 1183 g/cm³ 1,18 2. Water absorption ISO 62 % 0,3 3. Maximum permissible service temp - - - (no stronger mechanical stress involved) Upper temperature limit - °C 70 Lower temperature limit - °C - II. Mechanical Properties Test method Unit Value 1. Tensile strength at yield ISO 527 MPa 72 2. Elongation at yield. (εS) ISO 527 % - 3. Tensile strength at break (σR) ISO 527 MPa - 4. Elongation at break (εR) ISO 527 % 4,5 5. Impact strength (an) ISO 179 kJ/m2 12 6. Notch impact strength (ak) ISO 179 kJ/m2 2 7. Ball indentation / Rockwell hardness ISO 2039-1 MPa - 8. Shore-D DIN 53505 - 9. Flexural strength (σB 3,5 %) ISO 178 MPa 105 10. Modulus of elasticity (Et) ISO 527 MPa 3300 III. Thermal Properties Test method Unit Value 1. Vicat-softening point VST/B/50 ISO 306 °C 102 VST/A/50 ISO 306 °C - 2. Heat deflection temperature HDT/B ISO 75 °C - HDT/A ISO 75 °C 90 3. Coefficient of linear thermal expansion α DIN 53752 K-1∗10-4 0,7 4. Thermal conductivity at 20 °C (λ) DIN 52612 W/(m∗K) 0,19 IV. Electrical Properties Test method Unit Value 1. Volume resistivity VDE 0303 Ω∗cm ≥1015 Ω ≥10 13 2. Surface resistivity (Ro) VDE 0303 3. Dielectric constant at 1MHz (εr) DIN 53483 - 2,7 4. Dielectric loss factor at 1 MHz (tanδ) DIN 53483 - 0,02 5. Dielectric strength VDE 0303 kV/mm 30 6. Tracking resistance IEC 60112 - CTI ≥600 V. Additional Data Test method Unit Value 1. Bond ability - - + 2. Friction coefficient DIN 53375 - - 3. Flammability UL 94 - HB 4. UV stabilisation - - + All values are attributes of the used raw materials. The physical data contained in this table are typical values. They are obtained on test specimens under specific conditions and represent average values of a large number of tests. The results obtained on this tests specimens cannot be applied to finished parts without reservations, as behaviour is influenced by processing and shaping. Reproduction only with our definite permis- sion. Subject to change without notice. Page 1 of 1 Date: 11/07