LDPE Zhejiang Petrochemical 2427H
LDPE Zhejiang Petrochemical 2427H Resin
Material Introduction: LDPE Zhejiang Petrochemical 2427H is polyethylene resin mainly for film application. It features low friction coefficient, excellent surface smoothness, superior optical performance, good anti‑blocking property and favorable processability.
Main Applications
Food packaging film: widely used for food packaging benefited from good optical property and processability.
Bags: hand‑carrying bags, shopping bags.
Shrink film: outer packaging and collective packaging for commodities.
Cast film: high‑transparency substrate for composite packaging.
Other applications: agricultural film, sanitary film and liner film.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Test Data / Unit | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | ISO 1183 | 0.924 g/cm³ | Typical LDPE density range. |
| Melt Flow Rate (MFR) | ISO 1133 (190°C/2.16kg) | 1.9 g/10min | Good melt strength, suitable for blown‑film forming. | |
| Mechanical Properties | Tensile Yield Stress | ISO 527‑2 | 11.0 MPa | Resistance to tensile deformation. |
| Tensile Modulus | ISO 527‑2 | 260 MPa | Material rigidity index. | |
| Falling‑Dart Impact Strength | ASTM D1709 (50μm film) | 110 g | Higher value represents better film impact resistance. | |
| Optical Properties | Haze | ASTM D1003 (50μm film) | ＜9.0 % | Low haze provides high transparency for high‑end packaging display. |
| Gloss (20°) | ASTM D2457 (50μm film) | ＞50 | Higher gloss value brings brighter surface appearance. | |
| Thermal Properties | Vicat Softening Temperature | ISO 306/A50 | 94.0 °C | Heat‑resistance evaluation index. |
| Melting Temperature (DSC) | ISO 3146 | 111 °C | Peak temperature during material melting. |
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 poorer flowability compared with injection‑special grades, moderate pressure increase is required. |
| Injection Speed | Medium speed | ‑ |
| 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.
