PMMA Mitsubishi Chemical VH001
PMMA Mitsubishi Chemical VH001
PMMA Mitsubishi Chemical VH001 is high‑transparency polymethyl methacrylate. It features good dimensional stability, mechanical properties, heat‑resistance and weather‑resistance for multi‑scenario applications.
Main Applications
Automotive industry: taillights, signal lamps, instrument panels.
Lighting: lamp covers, diffusion panels.
Optical components: lenses and optical devices.
Electrical & electronics: transparent insulating components and home‑appliance parts.
Daily articles: containers, stationery.
Properties
表格
| Property Category | Item | Test Standard | Value | Unit |
|---|---|---|---|---|
| Physical | Density | ASTM D792 | 1.18‑1.19 | g/cm³ |
| Water absorption (24 h) | ASTM D570 | 0.3‑0.5 | % | |
| MFR(230℃/3.8 kg) | ASTM D1238 | 2.0‑2.5 | g/10min | |
| Molding shrinkage | ASTM D955 | 0.2‑0.6 | % | |
| Refractive index | ASTM D542 | 1.49 | — | |
| Light transmittance (3.2 mm) | ASTM D1003 | 93 | % | |
| Haze (3.2 mm) | ASTM D1003 | 0.3‑2.0 | % | |
| Mechanical | Tensile strength (break) | ASTM D638 | 74‑78 | MPa |
| Elongation at break | ASTM D638 | 5‑6 | % | |
| Flexural strength | ASTM D790 | 110‑127 | MPa | |
| Flexural modulus | ASTM D790 | 2700‑3300 | MPa | |
| Izod notched impact | ASTM D256 | ~1.7 | kJ/m² | |
| Rockwell hardness‑M | ASTM D785 | M95‑M101 | — | |
| Thermal | HDT (1.8 MPa) | ASTM D648 | 82‑102 | ℃ |
| Vicat softening temperature B50 | ASTM D1525 | 95‑116 | ℃ | |
| Linear thermal expansion coefficient | ASTM D696 | 6.0‑8.0×10⁻⁵ | cm/cm/℃ | |
| Electrical | Volume resistivity | IEC 60093 / JIS K6911 | ＞10¹⁵ | Ω·cm |
| Surface resistivity | IEC 60093 / JIS K6911 | ＞10¹⁶ | Ω | |
| Dielectric strength | — | 20 | MV/m | |
| Dielectric constant (60 Hz) | — | 3.7 | — | |
| Dissipation factor (60 Hz) | — | 0.05 | — | |
| Flammability | UL94 (1.5 mm) | UL94 | HB | class |
Injection‑Molding Parameters
表格
| Process | Item | Recommendation | Notes |
|---|---|---|---|
| Predrying | Drying temperature | 80‑85 ℃ | Desiccant dryer required |
| Drying time | 4‑5 h | Target moisture＜0.1%, eliminate bubbles & silver‑streaks | |
| Barrel setting | Rear zone | 185‑205 ℃ | Melt onset ~160 ℃, decomposition＞270 ℃ |
| Middle zone | 220‑240 ℃ | ||
| Front zone | 210‑230 ℃ | ||
| Nozzle | 210‑230 ℃ | About 20 ℃ lower than maximum barrel temperature | |
| Melt temperature | 210‑230 ℃ | Avoid long residence time to prevent degradation | |
| Mold temperature | 40‑80 ℃ | Higher temperature improves gloss yet lengthens cycle time | |
| Injection pressure | 80‑120 MPa | High‑viscosity material; holding pressure 40‑60 MPa | |
| Injection speed | Medium | High‑speed causes surface defects & internal stress | |
| Back pressure | 0.5‑1.0 MPa | For melt homogenization | |
| Screw speed | 50‑70 rpm | Avoid excessive shear rate |
Note: All data for reference only, follow official TDS for mass‑production.
