PMMA LG Chem IH830
PMMA LG Chem IH830
PMMA LG Chem IH830 is general‑purpose injection‑molding grade polymethyl methacrylate with high transparency. It delivers good heat‑resistance, excellent weather‑resistance, balanced mechanical properties and favorable processability for wide‑range applications.
Main Applications
Automotive parts: rear lamp covers, signal lamp housings, interior lamp covers, rear quarter windows, automotive emblems.
Electrical & electronics: LCD light guides, microwave oven door / front panels, VCR covers, car‑audio panels, dials, light tubes, optical lenses.
Sheets & panels: signboards, display cabinets, lamp housings, aquariums, photo frames.
Lighting & others: solid surface materials, lamp shades, ornaments, watch glasses, piano keys.
Properties
| Property Category | Item | Test Standard | Value | Unit |
|---|---|---|---|---|
| Physical | Density | ASTM D792 | 1.18 | g/cm³ |
| Water absorption (24 h) | ASTM D570 | 0.3 | % | |
| MFR(230℃/3.8 kg) | ASTM D1238 | 2.0‑2.3 | g/10min | |
| Molding shrinkage (flow direction) | ASTM D955 | 0.20‑0.60 | % | |
| Refractive index | ASTM D542 | 1.49 | — | |
| Light transmittance (3.0‑3.2 mm) | ASTM D1003 | 92‑93 | % | |
| Haze (3.0‑3.2 mm) | ASTM D1003 | 0.10‑0.50 | % | |
| Mechanical | Tensile strength (yield) | ASTM D638 | 70.6‑72.6 | MPa |
| Flexural strength | ASTM D790 | 135‑136 | MPa | |
| Flexural modulus | ASTM D790 | 3360‑3410 | MPa | |
| Elongation at yield | ASTM D638 | 10‑13 | % | |
| Rockwell hardness‑M | ASTM D785 | M98‑99 | — | |
| Izod notched impact (23℃) | ASTM D256 | 1.50‑1.60 | J/m | |
| Charpy notched impact | ISO 179/1eA | 1.4 | kJ/m² | |
| Thermal | HDT (1.8 MPa, un‑annealed) | ASTM D648 | 94‑103 | ℃ |
| Vicat softening temperature | ASTM D1525 | 113‑114 | ℃ | |
| Linear thermal expansion coefficient | ASTM D696 | 6.0×10⁻⁵ | cm/cm/℃ | |
| Electrical | Volume resistivity | ASTM D257 | ＞1.0×10¹⁵ | Ω·cm |
| Dielectric strength | ASTM D149 | 20 | kV/mm | |
| Dielectric constant (60 Hz) | ASTM D150 | 3.10 | — | |
| Dissipation factor (60 Hz) | ASTM D150 | 0.05 | — | |
| Flammability | UL94 (1.5 mm) | UL 94 | HB | class |
Injection‑Molding Parameters
| Process | Item | Recommendation | Notes |
|---|---|---|---|
| Predrying | Drying temperature | 80‑85 ℃ | Desiccant dryer required |
| Drying time | 2.0‑5.0 h | Moisture＜0.1% to avoid bubbles & silver‑streaks | |
| Barrel setting | Rear zone | 185‑205 ℃ | Melt onset ~160 ℃, thermal decomposition＞270 ℃ |
| Middle zone | 220‑240 ℃ | Control residence time strictly | |
| Front zone | 210‑230 ℃ | ||
| Nozzle temperature | 210‑230 ℃ | ||
| Melt temperature | 210‑230 ℃ | Do not overheat | |
| Mold temperature | 70‑80 ℃ | High‑viscosity material; easy to build‑up internal stress | |
| Injection pressure | Adjust by product & mold | Use minimum pressure for full filling & good appearance | |
| Injection speed | Medium | Fast speed may cause surface defects & residual stress | |
| Back pressure | 0.5‑1.0 MPa | Low back‑pressure for melt homogenization | |
| Screw speed | Medium (50‑70 rpm) | Avoid excessive shear heating |
Note: All data for reference only, refer to official TDS for mass‑production.
Current list updated: Add LG Chem IH830 PMMA series: Evonik 8N、Evonik 7N、Wanhua SF01、Wanhua HD03、Wanhua HD01、Chimei CM‑211、Chimei CM‑207、Chimei CM‑205、Shuangxiang SX‑304、SABIC P20MH、Mitsubishi VH001、Mitsubishi MF001、Mitsubishi IR‑D70、Sumitomo MH、Sumitomo LG2、Arkema V150、Arkema V040、Arkema DR101、LG Chem IH830
