PMMA SABIC P20MH
PMMA SABIC P20MH
PMMA SABIC P20MH is general‑purpose polymethyl methacrylate. It possesses balanced comprehensive properties, excellent transparency and good processing adaptability for diverse‑field applications.
Main Applications
Automotive lighting: typical for automotive taillight assemblies.
Household articles: injection‑molded household products.
Optical components: optical lenses.
Extrusion profiles: sheets, tubes and rods.
Lighting & decoration: skylights, agricultural greenhouses, residential & industrial roof panels, decorative sheets, lamp housings.
Packaging: rigid packaging.
Properties
表格
| Property Category | Item | Test Standard | Value | Unit |
|---|---|---|---|---|
| Physical | Density | ISO 1183 | 1.19 (typical) | g/cm³ |
| Water absorption(23℃/24h) | ISO 62 | 0.3 (typical) | % | |
| MFR(230℃/3.8 kg) | ISO 1133 | To be confirmed | g/10min | |
| Molding shrinkage (flow direction) | ISO 294‑4 | 0.2‑0.6 (typical) | % | |
| Refractive index | ISO 489 | 1.49 (typical) | — | |
| Light transmittance (3.2 mm) | ISO 13468‑1/-2 | 92 (typical) | % | |
| Haze | ISO 14782 | ＜2.0 (typical) | % | |
| Mechanical | Tensile strength(yield/break) | ISO 527‑2 | To be confirmed | MPa |
| Elongation at break | ISO 527‑2 | To be confirmed | % | |
| Flexural strength | ISO 178 | To be confirmed | MPa | |
| Flexural modulus | ISO 178 | To be confirmed | MPa | |
| Charpy notched impact(23℃) | ISO 179/1eA | To be confirmed | kJ/m² | |
| Rockwell hardness‑M | ISO 2039‑2 | To be confirmed | — | |
| Thermal | HDT (1.8 MPa, un‑annealed) | ISO 75‑2 | To be confirmed | ℃ |
| Vicat softening temperature B50 | ISO 306 | To be confirmed | ℃ | |
| Linear thermal expansion coefficient(flow) | ISO 11359‑2 | To be confirmed | cm/cm/℃ | |
| Electrical | Volume resistivity | IEC 60093 | ＞1.0×10¹⁵ (typical) | Ω·cm |
| Surface resistivity | IEC 60093 | ＞1.0×10¹⁶ (typical) | Ω | |
| Dielectric strength | IEC 60243‑1 | 20 (typical) | kV/mm | |
| Dielectric constant (1 MHz) | IEC 60250 | 3.10 (typical) | — | |
| Dissipation factor (1 MHz) | IEC 60250 | 0.04 (typical) | — | |
| Flammability | UL94 (1.5 mm) | UL94 | HB (typical) | class |
Injection‑Molding Parameters
表格
| Process | Item | Recommendation | Notes |
|---|---|---|---|
| Predrying | Drying temperature | 80‑85 ℃ | Desiccant dryer required; target moisture＜0.1 % |
| Drying time | 4‑5 h | Prevent bubbles & silver‑streaks | |
| Barrel setting‑screw type | Rear zone | 180‑200 ℃ | Melt onset ~160 ℃, decomposition＞270 ℃ |
| Middle zone | 190‑230 ℃ | ||
| Front zone | 180‑210 ℃ | ||
| Nozzle | 180‑210 ℃ | ||
| Barrel setting‑plunger type | Front zone | 210‑240 ℃ | |
| Nozzle | 210‑240 ℃ | ||
| Melt temperature | 210‑250 ℃ | Avoid long residence time to prevent degradation | |
| Mold temperature | 40‑80 ℃ | Higher temp improves gloss, yet lengthens cycle time | |
| Injection pressure | 80‑120 MPa(screw) / 80‑130 MPa(plunger) | High‑viscosity material requires high injection pressure | |
| Holding pressure | 40‑60 MPa | ||
| Injection speed | Medium | High‑speed triggers surface defects & internal stress | |
| Back pressure | 0.5‑1.0 MPa | For melt homogenization | |
| Screw speed | 20‑30 rpm | Screw machine only |
Extrusion Parameters
表格
| Process parameter | Sheet | Rod |
|---|---|---|
| Screw compression ratio | 2 | 2 |
| Rear barrel temperature | 150‑180 ℃ | 150‑180 ℃ |
| Middle barrel temperature | 170‑200 ℃ | 170‑200 ℃ |
| Front barrel temperature | 170‑230 ℃ | 170‑200 ℃ |
| Die temperature | 180‑200 ℃ | 170‑190 ℃ |
| Feeding zone temperature | 50‑80 ℃ | 50‑80 ℃ |
Note: All data for reference only, please refer to official TDS for mass‑production.
