PMMA LG Chem IF850
PMMA LG Chem IF850
PMMA LG Chem IF850 is high‑flow injection‑molding polymethyl methacrylate (acrylic / plexiglass). It features outstanding transparency, good mechanical properties, favorable weather‑resistance and excellent processability for diverse applications.
Main Applications
Thin‑wall & complex‑structure parts: complex frames, large‑size thin‑wall decorative trims.
Lighting industry: lamp covers, diffuser panels.
Automotive parts: lamp housings, instrument panels.
Electrical & electronics: LCD & backlight units, optical lenses, LED lamp housings, decorative parts requiring weather‑resistance.
Consumer goods: cosmetic containers, home‑appliance components, IT panels.
Properties
表格
| 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 | 12‑12.5 | g/10min | |
| Molding shrinkage (flow direction) | ASTM D955 | 0.20‑0.60 | % | |
| Refractive index | ASTM D542 | 1.49 | — | |
| Light transmittance (3.2 mm) | ASTM D1003 | 92‑93 | % | |
| Haze (3.2 mm) | ASTM D1003 | ＜0.10 | % | |
| Mechanical | Tensile strength (yield) | ASTM D638 | 62.8‑67 | MPa |
| Flexural strength (yield) | ASTM D790 | 119‑126 | MPa | |
| Flexural modulus | ASTM D790 | 3136‑3300 | MPa | |
| Elongation at yield | ASTM D638 | 3.0‑10 | % | |
| Rockwell hardness‑M | ASTM D785 | M89‑91 | — | |
| Charpy notched impact | ISO 179/1eA | 1.4 | kJ/m² | |
| Izod notched impact | ASTM D256 | 15‑16 | J/m | |
| Thermal | HDT (1.8 MPa) | ASTM D648 | 86‑90 | ℃ |
| Vicat softening temperature | ASTM D1525 | 90‑99 | ℃ | |
| 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 (60Hz) | ASTM D150 | 3.10‑4.0 | — | |
| Dissipation factor (60Hz) | ASTM D150 | 0.05 | — | |
| Flammability | UL94 (1.5 mm) | UL 94 | HB | class |
Injection‑Molding Parameters
表格
| Process | Item | Recommendation | Notes |
|---|---|---|---|
| Predrying | Drying temperature | 80‑85 ℃ | Desiccant dryer required |
| Drying time | 2‑5 h | Suggest 4‑5 h; moisture＜0.1% to avoid bubbles & silver‑streaks | |
| Barrel setting | Rear zone | 185‑205 ℃ | Melt onset ~160 ℃, decomposition＞270 ℃ |
| Middle zone | 220‑240 ℃ | Strictly control residence time | |
| Front zone | 210‑230 ℃ | ||
| Nozzle temperature | 210‑230 ℃ | ||
| Melt temperature | 210‑250 ℃ | Prevent thermal degradation | |
| Mold temperature | 70‑80 ℃ | Easy to produce internal stress | |
| Injection pressure | Adjust per product & mold | Use minimum pressure for full filling | |
| Injection speed | Medium‑high | High speed benefits thin‑wall filling; watch for gas‑mark defects | |
| Back pressure | 0.5‑1.0 MPa | Low back‑pressure for melt homogenization | |
| Screw speed | Medium (50‑100 rpm) | Avoid excessive shear heating |
Note: All data for reference only, refer to official TDS for mass‑production.
Current list updated: Add LG Chem IF850 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、LG Chem HP202、LG Chem IF850
