LLDPE Hanwha 3305
LLDPE Hanwha 3305 Resin
Material Introduction: LLDPE Hanwha 3305 is a well‑balanced linear low‑density polyethylene, especially suitable for various film products. It is well‑received for favorable mechanical properties, good processability and food‑contact suitability.
Main Applications
General‑purpose packaging films: industrial packaging films, commodity packaging bags, garbage bags, shrink‑wrap films. Excellent tensile strength, tear strength and dart‑impact strength provide reliable protection for contents.
Agricultural films: agricultural mulch films. Good weather resistance, toughness and environmental‑stress‑crack‑resistance fit agricultural service conditions.
Food‑contact applications: applicable for food‑contact articles such as bread bags. Please verify the latest compliance certification from supplier before practical use.
Performance Parameters
| Performance Category | Test Item | Test Method / Condition | Value & Unit | Remarks & Interpretation |
|---|---|---|---|---|
| Basic Properties | Density | ASTM D1505 | 0.922 g/cm³ | Typical density range for LLDPE. |
| Melt Flow Rate (MFR) | ASTM D1238 (190°C/2.16kg) | 1.9 g/10min | Good melt flowability, suitable for film processing. | |
| Mechanical Properties | Tensile Yield Strength | ASTM D638 | 17.7 MPa | Indicator of tensile‑deformation resistance. |
| Elongation at Break | ASTM D638 | 930 % | Extremely good toughness and ductility, tolerates heavy deformation without fracture. | |
| Film Tensile Strength (MD/TD) | ASTM D882 (30μm) | 37.0/34.3 MPa | Balanced high tensile capacity in machine direction and transverse direction. | |
| Film Elongation at Break (MD/TD) | ASTM D882 (30μm) | 600/800 % | Superb ductility in both directions; transverse performance is better. | |
| Dart Drop Impact Strength | ASTM D1709 (30μm) | 90 g | Puncture‑resistance and impact‑resistance; higher value means better performance. | |
| Tear Strength (MD/TD) | ASTM D1004 (30μm) | 112.8/117.7 kN/m | Anti‑tearing capability; higher value indicates harder to tear. | |
| Thermal Properties | Vicat Softening Temperature | ASTM D1525 | 103 °C | Heat‑resistance indicator; higher value means better thermal stability. |
| Brittleness Temperature | ASTM D746 | ＜‑76.0 °C | Retain toughness under ultra‑low temperature with excellent low‑temperature performance. | |
| Melting Peak Temperature | ASTM D3418 | 125 °C | Complete melting temperature for processing‑temperature reference. | |
| Optical Properties | Haze | ASTM D1003 (30μm) | 14 % | Low haze brings high transparency, satisfies display requirements for packaging. |
| Gloss (45°) | ASTM D2457 | 75 % | High gloss delivers bright surface appearance. |
Blown‑Film Processing
For mainstream blown‑film extrusion, temperature, pressure and other parameters shall be optimized according to equipment, film thickness and performance requirements.
‑ Processing Temperature: 150‑190 °C (from feed zone to die head). ‑ Blow‑up Ratio: Recommended range 2‑3. ‑ Film Thickness: Production range 30‑100 μm. ‑ Screw & Die: 40 mmφ LLD/LDPE dual‑purpose screw, matched with 75 mmφ die, die gap approx. 2 mm. ‑ Cooling Device: Dual‑lip air ring is recommended for better cooling and bubble stability.
General LLDPE Blown‑Film Precautions
‑ Shear sensitivity: LLDPE has low shear sensitivity and keeps higher viscosity under shearing, making it slightly harder to process than LDPE with identical MFR. ‑ Equipment requirements: Extruder may need higher power, slightly higher melt temperature and pressure. Appropriately widen die gap to avoid excessive back‑pressure and melt fracture. ‑ Bubble stability: LLDPE bubble stability is inferior to LDPE. Dual‑lip air ring improves cooling and bubble stability. ‑ Blending for better processability: Many film producers blend LLDPE and LDPE (e.g. 50 % each) to optimize processability and raise production capacity.
Disclaimer: All above data is for reference only.
