LDPE QAPCO MG70
LDPE QAPCO MG70 Resin
Material Introduction: LDPE QAPCO MG70 is low‑density polyethylene featured with ultra‑high flowability, well‑suited for thin‑wall articles production.
Main Applications
Thin‑wall injection‑molded products: disposable tableware, plastic caps, small‑size containers, daily‑use goods, plastic flowers.
Color masterbatch & modification carrier: excellent pigment and additive dispersion capacity owing to high flowability, widely used as base resin for color masterbatch and additive masterbatch.
Coating application: extrusion coating for protective or sealing layer on paper, fabric and other substrates.
Food‑contact application: complies with FDA 21 CFR 177.1520, applicable for food‑contact packaging materials and containers.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Test Data / Unit | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | ASTM D1505 | 0.918 g/cm³ | Typical LDPE density range. |
| Melt Flow Rate (MFR) | ASTM D1238 (190°C/2.16kg) | 70 g/10min | Ultra‑high melt flow, core feature for fast filling thin‑wall parts. | |
| Mechanical Properties | Tensile Yield Strength | ASTM D638 | 6.00 MPa | General strength level for LDPE. |
| Tensile Breaking Strength | ASTM D638 | 10.0 MPa | General strength level for LDPE. | |
| Elongation at Break | ASTM D638 | 200 % | Moderate toughness and ductility performance. | |
| Thermal Properties | Vicat Softening Temperature | ASTM D1525 | 78.0 °C | Heat‑resistance index, pay attention to upper service temperature limit. |
| Crystallization Peak Temperature (DSC) | ASTM E794 | 101 °C | Peak temperature during material melting‑crystallization process. | |
| Processing Property | Molding Shrinkage (Flow Direction) | ASTM D955 | 1.5‑2.5 % | Shrinkage reference for product structural design. |
Injection‑Molding Process Parameters
| Process Parameters | Recommended Range | Remarks & Interpretation |
|---|---|---|
| Drying Treatment | Normally not required | Low‑hygroscopic LDPE for direct use. Dry at 60‑70 ℃ for 1‑2 h under high‑humidity storage condition. |
| Barrel Temperature | 150‑170 ℃ / 180‑280 ℃ | Two reference ranges available. Start debugging from low‑temperature zone 150‑190 ℃ to avoid thermal degradation for this high‑flow grade. Temperature rises from rear zone to front zone. |
| Nozzle Temperature | 160‑180 °C | Slightly lower than front‑zone barrel temperature. |
| Mold Temperature | 20‑40 °C | Low mold temperature shortens cycle time and prevents product deformation. |
| Injection Pressure | 30‑80 MPa (300‑800 bar) | High flowability permits relatively low injection pressure. Excessive pressure will cause flash. Holding pressure shall be lower than injection pressure. |
| Injection Speed | Medium‑high speed | Fast injection improves thin‑wall filling; cooperate with pressure and temperature to avoid flash or air trapping. |
| Screw Speed | Moderate (50‑100 rpm) | Prevent excessive shear heat generation. |
| Back Pressure | 0.5‑1.0 MPa | Low back pressure is sufficient for melt compaction. |
Disclaimer: All above data is for reference only.
