LDPE Singapore Polyolefin L705
LDPE Singapore Polyolefin L705 Resin
Material Introduction: LDPE Singapore Polyolefin L705 is non‑toxic, odorless low‑density polyethylene with high toughness and flexibility, mainly designed for extrusion coating process.
Main Applications
Composite packaging materials: coating for cartons (milk, fruit‑juice packaging), fabrics or non‑woven fabrics, providing moisture‑proof, sealing and heat‑sealing functions.
Industrial coating: coating for aluminum foil and other substrates.
Performance Parameters
| Performance Category | Test Item | Test Method | Test Data | Data Unit | Remarks & Interpretation |
|---|---|---|---|---|---|
| Basic Properties | Density | ASTM D‑792 | 0.918 | g/cm³ | Typical LDPE density range. |
| Melt Flow Rate (MFR) | ASTM D‑1238 | 7.0 | g/10min | Good flowability, fit for extrusion coating production. | |
| Mechanical Properties | Tensile Strength at Break | ASTM D‑638 | 140（13.7） | kg/cm²（MPa） | Tensile strength index of resin. |
| Elongation at Break | ASTM D‑638 | 550 | % | Excellent toughness and ductility performance. | |
| Stiffness (Flexural Modulus) | ASTM D‑747 | 2200（216） | kg/cm²（MPa） | Evaluate material rigidity. | |
| Thermal Properties | Melting Temperature | ‑ | 105 | °C | Resin melting peak temperature. |
Injection‑Molding Process Parameters
| Process Parameters | Recommended Range | Remarks |
|---|---|---|
| Barrel Temperature | 160‑200 °C | Temperature increases from rear zone to front zone. |
| Nozzle Temperature | 180‑200 °C | ‑ |
| Mold Temperature | 20‑40 °C | ‑ |
| Injection Speed | Medium‑low speed | High‑flow material; excessive speed causes flash and air bubbles. |
| Injection Pressure | Medium‑low pressure | Only enough to fill cavity; high pressure easily brings flash. |
| Back Pressure | 0.5‑1.0 MPa | Excessive back pressure is not required. |
| Screw Speed | 50‑100 rpm | Avoid excessive shear heat accumulation. |
Disclaimer: All above data is for reference only.
