LLDPE ZRCC DFDC‑7050
LLDPE Zhenhai Refining & Chemical DFDC‑7050 Resin
Material Introduction: LLDPE Zhenhai Refining & Chemical DFDC‑7050 is linear low‑density polyethylene. Widely used in film manufacturing for good film‑forming property, excellent anti‑blocking performance and balanced mechanical properties.
Main Applications
Food packaging: good anti‑blocking property and compliance with food‑contact standards, suitable for food bags such as easy‑tear commodity packages for fruits, vegetables, meat and snacks.
Industrial packaging: for electronic products, hardware accessories, chemical raw materials. Anti‑static performance protects sensitive electronic components from static damage.
Agricultural films: agricultural mulch films.
Other film products: daily‑use packaging bags, garbage bags.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Value & Unit (Premium Grade) | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | GB/T 1033.2 | 0.918‑0.922 g/cm³ | Typical LLDPE density range. |
| Melt Flow Rate (MFR) | GB/T 3682 (190°C/2.16kg) | 2.0 ± 0.2 g/10min | Good melt flowability, suitable for film processing. | |
| Mechanical Properties | Tensile Yield Strength | GB/T 1040.2 | ≥ 8.5 MPa | Indicator of tensile‑deformation resistance. |
| Elongation at Break | GB/T 1040.2 | ≥ 400 % | Good toughness and ductility, resistant to fracture under large deformation. | |
| Dart Drop Impact Strength | ‑ (30 μm film) | ≥ 55 g | Puncture‑resistance and impact‑resistance; higher value means better performance. | |
| Optical Properties | Haze | GB/T 2410 | Actual measured (typical 13.3 %) | Transparency indicator; lower haze represents higher transparency. |
| Film Appearance | Fish‑eye (≥0.8 mm) | Q/SH 3065 014 | ≤ 8 pcs/1520cm² | Film quality indicator; lower value means better uniformity and fewer impurities. |
| Fish‑eye (0.4 mm) | Q/SH 3065 014 | ≤ 40 pcs/1520cm² | Same as above. | |
| Pellet Appearance | Discolored Pellets | SH/T 1541 | ≤ 10 pcs/kg | Purity indicator; fewer particles mean higher cleanliness. |
| Shark‑skin & Tailed Pellets | ‑ | ≤ 10 pcs/kg | Same as above. | |
| Oversize & Undersize Pellets | ‑ | ≤ 10 g/kg | Same as above. | |
| Other Features | Anti‑blocking Property | ‑ | Easy opening | Core advantage; films are easy to separate for end‑use. |
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 has low shear sensitivity and narrow molecular‑weight distribution, maintains higher viscosity under extrusion shear, slightly harder to process than LDPE with identical MFR. ‑ Equipment requirements: Extruder may need higher power, higher melt temperature and pressure. Widen die gap (e.g. from LDPE 0.024‑0.040 inch to 0.060‑0.10 inch) to avoid excessive back‑pressure and melt fracture. ‑ Bubble stability: LLDPE 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 and LDPE (e.g. 50 % each) to optimize processability and raise output capacity.
Disclaimer: All above data is for reference only.
