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PLEXIGLAS® 7N | PMMA | Röhm GmbH
Release time：2025-06-18Author：小编
PLEXIGLAS® 7N | PMMA | Röhm GmbH
Product Texts
PLEXIGLAS® 7N is an amorphous thermoplastic molding compound (PMMA).
Typical properties of PLEXIGLAS® molding compounds are:
Special properties of PLEXIGLAS® 7N molding compound are:
Used for injection molding optical and technical items.
optical waveguides, luminaire covers, automotive lighting, instrument cluster covers, optical lenses, displays, etc.
PLEXIGLAS® 7N can be processed on injection molding machines with 3-zone general purpose screws for engineering thermoplastics.
PLEXIGLAS® molding compounds are supplied as pellets of uniform size, packaged in 25kg polyethylene bags or in 500kg boxes with PE lining; other packaging on request.
| Rheological properties | Value | Unit | Test Standard |
| Melt volume-flow rate, MVR | 6 | cm³/10min | ISO 1133 |
| Temperature | 230 | °C | ISO 1133 |
| Load | 3.8 | kg | ISO 1133 |
| Mechanical properties | Value | Unit | Test Standard |
| Tensile modulus | 3200 | MPa | ISO 527-1/-2 |
| Stress at break | 73 | MPa | ISO 527-1/-2 |
| Strain at break | 3.5 | % | ISO 527-1/-2 |
| Tensile creep modulus, 1h | 2800 | MPa | ISO 899-1 |
| Tensile creep modulus, 1000h | 2200 | MPa | ISO 899-1 |
| Charpy impact strength, +23°C | 20 | kJ/m² | ISO 179/1eU |
| Thermal properties | Value | Unit | Test Standard |
| Glass transition temperature, 10°C/min | 110 | °C | ISO 11357-1/-2 |
| Temp. of deflection under load, 1.80 MPa | 95 | °C | ISO 75-1/-2 |
| Temp. of deflection under load, 0.45 MPa | 100 | °C | ISO 75-1/-2 |
| Vicat softening temperature, 50°C/h 50N | 103 | °C | ISO 306 |
| Coeff. of linear therm. expansion, parallel | 80 | E-6/K | ISO 11359-1/-2 |
| Burning behavior at 1.5 mm nominal thickness | HB | class | IEC 60695-11-10 |
| Thickness tested (1.5) | 1.6 | mm | IEC 60695-11-10 |
| Yellow Card available | Yes | - | - |
| Burning rate, thickness 1 mm | 72.3 | mm/min | ISO 3795 (FMVSS 302) |
| FMVSS | B | - | ISO 3795 (FMVSS 302) |
| Oxygen index | 17.2 | % | ISO 4589-1/-2 |
| Electrical properties | Value | Unit | Test Standard |
| Relative permittivity, 100Hz | 3.7 | - | IEC 62631-2-1 |
| Relative permittivity, 1MHz | 2.8 | - | IEC 62631-2-1 |
| Dissipation factor, 100Hz | 500 | E-4 | IEC 62631-2-1 |
| Dissipation factor, 1MHz | 200 | E-4 | IEC 62631-2-1 |
| Volume resistivity | >1E13 | Ohm*m | IEC 62631-3-1 |
| Surface resistivity | 1E13 | Ohm | IEC 62631-3-2 |
| Comparative tracking index | 600 | - | IEC 60112 |
| Other properties | Value | Unit | Test Standard |
| Water absorption | 2 | % | Sim. to ISO 62 |
| Humidity absorption | 0.6 | % | Sim. to ISO 62 |
| Density | 1190 | kg/m³ | ISO 1183 |
| Material specific properties | Value | Unit | Test Standard |
| Viscosity number | 53 | cm³/g | ISO 307, 1157, 1628 |
| Luminous transmittance | 92 | % | ISO 13468-1, -2 |
| Rheological calculation properties | Value | Unit | Test Standard |
| Density of melt | 1060 | kg/m³ | - |
| Thermal conductivity of melt | 0.181 | W/(m K) | - |
| Spec. heat capacity melt | 2440 | J/(kg K) | - |
| Eff. thermal diffusivity | 6.99E-8 | m²/s | - |
| Ejection temperature | 85 | °C | - |
| Test specimen production | Value | Unit | Test Standard |
| Processing conditions acc. ISO | 8257 | - | ISO ....-2 |
| Injection molding, melt temperature | 243 | °C | ISO 294 |
| Injection molding, mold temperature | 63 | °C | ISO 294 |
| Injection molding, injection velocity | 195 | mm/s | ISO 294 |
Characteristics
Processing
Injection Molding
Delivery form
Pellets
Special Characteristics
Light stabilized or stable to light, U.V. stabilized or stable to weather, Transparent
Regional Availability
North America, Europe, Asia Pacific, South and Central America, Near East/Africa
Other text information
Injection molding
PREPROCESSING
Predrying temperature: max. 93 °C
Predrying time in a desiccant-type drier: 2 - 3 h
PROCESSING
Melt temperature: 220 - 260°C
Mold temperature:60 - 90°C
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