LLDPE Iran Petrochemical LL22B02
LLDPE Iran Petrochemical LL22B02 Resin
Material Introduction: LLDPE Iran Petrochemical LL22B02 is linear low‑density polyethylene, mainly applied for film products. It features high rigidity, high strength, excellent ductility and favorable mechanical properties.
Main Applications
Film products: various plastic films including agricultural films and packaging films. Good ductility and mechanical properties improve film tensile strength and tear resistance.
Injection‑molded articles: high rigidity and strength suit structurally‑complex injection‑molded parts with certain strength requirements, such as plastic containers and components.
Pipe manufacturing: delivers good pressure‑resistance and environmental‑stress‑crack‑resistance for pipe production.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Value & Unit | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | ASTM D‑1505 | 0.918~0.935 g/cm³ | Typical density range for LLDPE. |
| Melt Flow Rate (MFR) | ASTM D‑1238 (190°C/2.16kg) | To be confirmed g/10min | Public online data unavailable; refer to official TDS. Critical parameter for processing flowability judgement. | |
| Mechanical Properties | Tensile Yield Strength | ‑ | To be confirmed MPa | Public online data unavailable; indicator of tensile‑deformation resistance. |
| Elongation at Break | ‑ | To be confirmed % | Public online data unavailable; reflects material toughness and ductility. | |
| Optical Properties | Haze | ‑ | To be confirmed % | Public online data unavailable; lower haze means higher film transparency. |
| Film Appearance | Fish‑eye | ‑ | To be confirmed pcs/1520cm² | Public online data unavailable; lower value represents better film uniformity and fewer impurities. |
Blown‑Film Processing
For mainstream blown‑film extrusion, temperature, pressure and other parameters shall be optimized according to equipment, film thickness and performance requirements. General LLDPE blown‑film temperature range: 150‑210 ℃.
Blown‑Film Processing Notes
‑ Shear sensitivity: LLDPE features low shear sensitivity and narrow molecular‑weight distribution, maintains higher viscosity under extrusion shearing, which makes it harder to process than LDPE with identical melt flow rate. ‑ Equipment requirements: Extruder may require higher power, higher melt temperature and pressure. Die gap shall be properly widened to avoid excessive back‑pressure and melt fracture. ‑ Bubble stability: LLDPE blown‑film bubble stability is inferior to LDPE. Dual‑lip air ring is recommended to improve cooling and bubble stability. ‑ Blending for better processability: Many film producers blend LLDPE with LDPE (e.g. 50 % each) to optimize processability and raise output capacity.
Injection‑Molding Processing
| Process Parameters | Recommended Range (General LLDPE) | Remarks & Interpretation |
|---|---|---|
| Drying Treatment | Normally not required | LLDPE moisture absorption＜0.01%. No drying needed under good storage condition. Dry at 60‑70 °C for 1‑2 h as precaution if package damaged or high‑humidity environment. |
| Barrel Temperature | 160‑220 °C | Temperature rises from rear zone to front zone. Example: rear 160‑180 °C, middle 180‑200 °C, front 190‑220 °C. Adjust according to MFR; raise temperature for low‑MFR grade. |
| Mold Temperature | 30‑60 °C | Low mold temperature shortens cycle time and prevents product deformation. |
| Injection Pressure | 50‑100 MPa | PE owns good flowability; adopt lower pressure except for thin‑wall & slender parts. |
| Injection Speed | Medium speed | Higher speed is required for thin‑wall articles. |
| Holding Pressure | 40%‑60% of injection pressure | Avoid excessive holding pressure and long holding time to reduce internal stress. |
| Back Pressure | 0.5‑1.5 MPa | Low back pressure for melt compaction; excessive back pressure generates extra shear heat. |
| Screw Speed | 50‑100 rpm | Medium speed to prevent excessive shear heat. |
Disclaimer: All above data is for reference only.
