LDPE NPC Iran 2420H
LDPE NPC Iran 2420H Resin
Material Introduction: LDPE NPC Iran 2420H is film‑grade low‑density polyethylene, well‑suited for film products requiring excellent optical performance including high transparency and low haze. Its MFR (1.5‑1.9 g/10min) is relatively low for injection‑molding process.
Main Applications
Food packaging film: packaging for candy, vegetables, frozen food; blown‑film for liquid such as milk and fruit juice; packaging for condiments, pastries, sugar, preserved fruit, biscuits, milk powder, tea, flaked fish‑meat and other foodstuffs.
Agricultural films: agricultural film, mulch film, vegetable greenhouse film.
Other packaging films: heavy‑duty bag, shrink film, elastic film, liner film, construction film, general‑purpose industrial packaging film and food bag; packaging for shirts, garments, knitted cotton goods and chemical‑fiber products.
Inner layer for composite packaging: frequently used as heat‑sealing substrate for multi‑layer composite films, since single‑layer PE film has limited mechanical performance.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Test Data / Unit | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | ISO 1183 / ASTM D1505 | 0.918‑0.924 g/cm³ | Typical LDPE density range with light weight. |
| Melt Flow Rate (MFR) | ISO 1133(190°C/2.16kg) / ASTM D1238 | 1.5‑1.9 g/10min | Good melt strength, more suitable for extrusion blow‑film forming. | |
| Mechanical Properties | Tensile Strength (MD) | ISO 527‑1 | 26 MPa | Tensile strength in machine direction of film. |
| Elongation at Break | ISO 527‑1 | 250‑600 % | Excellent toughness and ductility performance. | |
| Falling‑Dart Impact Strength | ASTM D1709 (50μm blown film) | 110 gm | Higher value represents better film impact resistance. | |
| Optical Properties | Haze | ASTM D1003 | 6 % | Low haze for high transparency with slight milky‑transparent appearance. |
| Gloss (20°) | ASTM D2457 | 50 | Surface gloss evaluation index. | |
| Thermal Properties | Vicat Softening Temperature | ISO 306 (A50) | 94 °C | Heat‑resistance evaluation index. |
| Brittle Temperature | ‑ | ＜‑25 °C | Good low‑temperature toughness performance. |
Injection‑Molding Process Parameters
| Process Parameters | Recommended Range | Remarks |
|---|---|---|
| Barrel Temperature | 160‑210 °C | Temperature rises from rear zone to front zone. LDPE melt is susceptible to thermo‑oxidative degradation upon oxygen exposure. |
| Nozzle Temperature | 180‑200 °C | ‑ |
| Mold Temperature | 30‑50 °C | ‑ |
| Injection Pressure | Medium‑high pressure | Relatively poor flowability vs injection‑special grades, moderate pressure increase is required. |
| Injection Speed | Medium speed | ‑ |
| Back Pressure | 0.5‑1.0 MPa | Excessive back pressure is unnecessary. |
| Screw Speed | 50‑100 rpm | Avoid excessive shear heat accumulation. |
Disclaimer: All above data is for reference only.
