PMMA Evonik PLEXIGLAS® 7N
PMMA Evonik PLEXIGLAS® 7N
PMMA Evonik(Degussa) 7N is optical‑grade, injection‑molding polymethyl methacrylate. It features high transparency, outstanding weather resistance, good mechanical strength and thermal resistance for multi‑field applications.
Main Applications
Automotive: automotive taillights, signal lamps, instrument panels.
Optical components: lenses, light guides, optical lenses, protective covers.
Lighting: lamp covers, housings, light diffusers.
Electrical & electronics: transparent insulating components, transparent keys.
Consumer goods: drinking cups, stationery, tool‑box housings, showcase panels.
Properties
| Property Category | Item | Test Standard | Value | Unit |
|---|---|---|---|---|
| Physical | Density | ISO 1183 | 1.19 | g/cm³ |
| Water absorption (24 h) | ISO 62 / DIN 53495 | 0.3 | % | |
| MVR(230℃/3.8 kg) | ISO 1133 | 6.00 | cm³/10min | |
| MFR(230℃/3.8 kg) | ISO 1133 | 10 | g/10min | |
| Refractive index | ISO 489 | 1.490 | — | |
| Optical | Light transmittance (3 mm) | ISO 13468‑2 | 92 | % |
| Haze | ASTM D1003 | ＜0.5 | % | |
| Mechanical | Tensile modulus | ISO 527‑2/1 | 3200 | MPa |
| Tensile strength (break) | ISO 527‑2/5 | 73.0 | MPa | |
| Tensile strain (break) | ISO 527‑2/5 | 3.5 | % | |
| Flexural modulus | ISO 178 | 3200 | MPa | |
| Charpy un‑notched impact (23℃) | ISO 179/1eU | 20 | kJ/m² | |
| Charpy notched impact (23℃) | ISO 179/1eA | 2 | kJ/m² | |
| Ball indentation hardness | ISO 2039‑1 | 148 | MPa | |
| Thermal | HDT 1.8 MPa(un‑annealed) | ISO 75‑2/A | 95 | ℃ |
| HDT 0.45 MPa(un‑annealed) | ISO 75‑2/B | 100 | ℃ | |
| Vicat B50 | ISO 306 | 103 | ℃ | |
| Glass transition temperature Tg | ISO 11357‑2 | 110 | ℃ | |
| CLTE(0‑50℃) | ISO 11359‑2 | 7.0‑8.0×10⁻⁵ | 1/K | |
| Electrical | Volume resistivity | IEC 60093 | ＞10¹⁵ | Ω·cm |
| Flammability | UL94(1.6 mm) | UL94 | HB | class |
| DIN 4102 | DIN 4102 | B2 | class |
Injection‑Molding Parameters
| Process | Item | Recommendation | Notes |
|---|---|---|---|
| Predrying | Drying temperature | ≤93 ℃ | Desiccant dryer required; prevent silver‑streaks & bubbles |
| Drying time | 2.0‑4.0 h | Target moisture＜0.1 % | |
| Injection | Melt temperature | 220‑260 ℃ | Avoid high temperature & long residence time to prevent degradation |
| Mold temperature | 60‑90 ℃ | Higher mold temp improves gloss & reduces internal stress | |
| Injection pressure | Adjust by product & mold | Ensure full filling & good appearance | |
| Injection speed | Medium | Excess speed causes surface defects & internal stress |
Note: All data for reference only.
