| HS Code | 327091 |
| Product | HANWHA LLDPE 3305 |
| Melt Flow Index 190 C 2 16kg | 3.3 g/10min |
| Density | 0.930 g/cm³ |
| Melting Point | 124 °C |
| Vicat Softening Point | 108 °C |
| Tensile Strength At Yield | 120 kg/cm² |
| Tensile Strength At Break | 250 kg/cm² |
| Elongation At Break | 700 % |
| Izod Impact Strength | 25 kg·cm/cm |
| Shore D Hardness | 50 |
| Brittleness Temperature | -70 °C |
| Heat Deflection Temperature | 60 °C |
| Environmental Stress Crack Resistance | >500 hrs |
As an accredited HANWHA LLDPE 3305 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA LLDPE 3305 is supplied in 25 kg polyethylene bags, palletized and shrink-wrapped for safe transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loading of HANWHA LLDPE 3305, typically 25 MT packed in 25 kg bags, palletized. |
| Shipping | HANWHA LLDPE 3305 is shipped as inert, non-hazardous resin pellets in moisture-proof woven bags or bulk containers. Keep dry and away from direct sunlight during transport. Store below 50°C to prevent fusion. Use clean, covered trucks or containers; avoid excessive stacking and sharp objects to maintain product integrity. |
| Storage | Store HANWHA LLDPE 3305 in a dry, cool, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep packaging sealed to prevent moisture absorption and contamination. Maintain indoor storage or use covered, weatherproof shelter. Avoid contact with strong oxidizers and minimize dust accumulation to reduce static ignition risk. |
| Shelf Life | Shelf life is indefinite if stored in a cool, dry, well-ventilated area, away from direct sunlight and moisture. |
On three-layer blown-film lines equipped with grooved-feed extruders of 30:1 L/D, a 250 mm spiral-mandrel die, and internal bubble cooling, HANWHA LLDPE 3305 is typically placed in the core layer of heavy-duty sack film with total gauge between 120 µm and 180 µm. Melt temperature at the die entry should be held between 190°C and 210°C as measured by an insertion thermocouple. Excursions above 220°C accelerate gel formation and reduce dart impact retention. The die gap is normally set at 1.8–2.2 mm, and blow-up ratio is maintained between 2.5:1 and 3.2:1 to limit tear anisotropy. Frost line height is adjusted to 5–7 times the die gap for low-stalk stability. When the frost line drops below 40 cm, haze increases and seal initiation becomes less consistent. A back pressure of 350–420 bar on the grooved-feed section indicates suitable screen-pack loading for continuous runs. Pressures above 480 bar on prolonged runs typically signal screen blockage from oxidised regrind or additive agglomeration. The film is evaluated by ISO 527-3 for tensile properties, ISO 6383-2 for trouser tear, and ASTM D1709-22 method A for F50 dart impact. Published data for this specific configuration is limited, but blown film lines in this thickness range generally target impact values above 350 g F50 for 150 µm film and trouser tear above 120 N/mm in the machine direction.
For FIBC liner use, the gauge is reduced to 60–90 µm and the resin is coextruded with a metallocene-rich skin to improve hot tack. The liner must survive drop tests conducted under ISO 21898:2019 for flexible intermediate bulk containers. In this application, melt temperature at the inner die lip is held below 205°C to prevent die-lip deposit formation. Corona treatment on the outer surface is kept between 38 mN/m and 42 mN/m per ISO 8296 for subsequent printing or lamination. Treatment above 48 mN/m can oxidatively degrade the surface and lower seal strength after warehouse storage.
In agricultural film production, HANWHA LLDPE 3305 functions as a skin or core resin in coextruded three-layer covers with total thickness from 150 µm to 200 µm. Because the resin is olefinic and contains no UV stabiliser as supplied, the formulation must be compounded with a hindered amine light stabiliser masterbatch at 0.6–1.2 wt% and a UV absorber at 0.2–0.5 wt%. Failure to pre-disperse these additives yields surface blooming and premature loss of tensile elongation after field exposure. In regions with high solar load, the outer layer may use 1.0–1.5 wt% of a carbon black masterbatch or a white titanium dioxide concentrate to reduce IR transmission. Carbon black addition beyond 2.0 wt% in the skin layer can raise melt viscosity and destabilise the bubble on low-stalk lines. The film is assessed after xenon-arc weathering by ISO 4892-2 and tensile retention by ISO 527-3. A common pass criterion is retention of at least 50% of initial elongation after 3500 hours of accelerated weathering, though published data for this specific grade under multi-season greenhouse exposure is limited.
For thermal IR retention, the LLDPE skin is often matched with an EVA core containing vinyl acetate content between 12 wt% and 18 wt%. The skin layer containing 3305 reduces surface tack and improves dust resistance under field conditions. EVA migration to the surface can lower corona treatment level and should be monitored by ISO 8296. Anti-drip or anti-fog concentrates are added only to the inner layer, because the olefinic skin layer exhibits slow surface diffusion and would retain beading agents without rapid release. On low-stalk lines, the melt temperature should not exceed 210°C when EVA is present in adjacent layers, since acetic acid release at higher temperatures corrodes die lips and contributes to film odour.
Because the ductile-to-brittle transition temperature of butene-LLDPE in the 0.918–0.922 g/cm³ density band is typically below -40°C, the resin is used in monolayer and coextruded films for frozen food contact at service temperatures down to -30°C. For IQF vegetable and seafood bags, film gauge is set between 50 µm and 70 µm. Puncture resistance under cold conditions is evaluated by ASTM D5748-95, while cold-temperature dart impact is normally performed at -18°C using ASTM D1709-22 with conditioning per ASTM D618. Seal initiation temperature must remain below 105°C at 0.3 MPa sealing pressure and 0.8 s dwell time to maintain packaging line speed. Hot-tack data are generated by ASTM F1921 with a finite seal-bar geometry. The addition of slip agents above 0.2 wt% erucamide should be avoided in deep-freeze applications, because bloom rates decrease with temperature and the surface can become tacky during intermediate storage at room temperature. Corona treatment is typically maintained at 38–42 mN/m for printing or lamination. Excessive treatment above 48 mN/m accelerates oxidative surface damage and weakens heat seal strength after 90 days of storage.
Food-contact status for this application falls under FDA 21 CFR 177.1520(c) for olefin polymers and EU No 10/2011 for plastic materials intended to come into contact with food. Overall migration under EU No 10/2011 must not exceed 10 mg/dm². Processors should confirm antioxidant extraction limits for low-temperature food contact, because additive migration is not exempted by low service temperature alone.
On a 90 mm grooved-feed single-screw extruder with 30:1 L/D and a barrier screw, HANWHA LLDPE 3305 reaches stable output at screw speeds between 80 rpm and 120 rpm when the temperature profile is set from 175°C in the feed zone to 195°C at the adapter. Increasing screw speed beyond 140 rpm without raising the die temperature produces melt fracture and irregular frost line movement. Specific energy consumption rises above 0.28 kWh/kg when the screen pack is blinded by oxidised polymer. Melt pressure measured before the screen changer should remain between 320 bar and 410 bar at 110 rpm. Pressure fluctuation above ±15 bar indicates poor feed zone temperature control or inconsistent regrind particle size. The use of chill-roll air knifes and secondary air rings improves bubble stability at high output. Cooling air humidity above 70% RH can produce condensation marks on the outer bubble surface and reduce surface tension below 36 mN/m.
Melt flow rate of the grade is determined by ISO 1133-1:2022 at 190°C and 2.16 kg. For production batches, a variation beyond ±0.1 g/10 min from the certificate of analysis indicates a comonomer distribution shift that will alter bubble stability and seal behaviour. Resin feed temperature should be kept below 45°C to prevent pellet agglomeration in the hopper. Storage beyond 6 months in high-humidity environments can increase surface moisture and create bubble pinholes at high output rates.
On vertical form-fill-seal lines running at 80–120 bags/min, HANWHA LLDPE 3305 is converted into the inner sealant layer of a coextruded film with a thickness of 60–80 µm. The film is corona-treated on the outer layer and left untreated on the sealant surface. Coefficient of friction is adjusted with erucamide at 0.08–0.18 wt% and synthetic silica antiblock at 0.05–0.15 wt%. Kinetic COF against stainless steel, measured by ISO 8295, is typically held below 0.35 to prevent bridging in the forming tube. Seal strength is assessed by ASTM F88/F88M-21 at 0.4 MPa seal pressure and 0.6 s dwell time. For contamination-prone applications, seal-through-grease performance must exceed 15 N/25 mm at 115°C seal-bar temperature. Hot tack measured by ASTM F1921 should remain above 4 N/25 mm at 0.6 s dwell and 1.0 N peel force, otherwise the film will be rejected on high-speed intermittent jaw machines.
Processors should avoid adding more than 0.2 wt% of a migratory slip agent to the sealant layer. Migration from the surface into the seal interface during storage reduces seal strength and increases leaker rates after 30 days of warehouse storage. If the film is used for modified atmosphere packaging, oxygen transmission rate must be verified by ASTM D3985 for the complete laminate structure, since LLDPE alone provides only moderate oxygen barrier. Puncture resistance is measured by ASTM F1306 for occasional angular product protrusions.
In blown stretch film for manual pallet wrapping, the mechanical limits of a butene-LLDPE of this density class become apparent above 120% pre-stretch on power pre-stretch equipment. The film is produced at 20–25 µm gauge with a blow-up ratio of 4.0:1 to 4.5:1 and high air ring cooling to increase transverse direction stretch. Puncture resistance is measured by ASTM D5748-95, and load retention after 24 h at 23°C is evaluated by ASTM D5459. For loads above 1200 kg or sharp-edged products, a blend with 20–30 wt% of a metallocene octene-LLDPE is generally required to prevent catastrophic film breakage during wrapping. HANWHA LLDPE 3305 alone is not recommended for cast stretch lines demanding line speeds above 500 m/min and final film thickness below 15 µm. Published data for this specific cast-film configuration is limited, but draw resonance and edge tear typically increase when the melt index of a film grade remains below 1.0 g/10 min.
For blown-film machines retrofitted with air-assisted collapsing frames, gauge uniformity should be monitored by on-line capacitance measurement. Thickness variation above ±7% at 20 µm base film creates stretch banding and roll telescoping. The addition of a chilled air stream at 8–12°C to the outer bubble surface reduces blocking, but surface condensation must be avoided below 10°C dew point. In high-speed slitting, edge trim waste should be kept below 12% of total web width to avoid regrind-induced gel formation when trim is recycled into the core layer.
| Application | Standard or regulation | Measured parameter | Typical boundary |
|---|---|---|---|
| Heavy-duty sack film | ASTM D1709-22 | F50 dart impact | ≥350 g at 150 µm |
| Frozen food film | ASTM F88/F88M-21 | Seal strength | ≥15 N/25 mm at 115°C |
| Agricultural cover | ISO 4892-2 | Xenon-arc exposure | 3500 h, tensile retention ≥50% |
| General food contact | FDA 21 CFR 177.1520(c)(3) | Olefin polymer compliance | Food-contact conditions of use |
The application of the resin to refuse sacks and can liners requires only 35–50 µm gauge on conventional low-density blown-film lines. The primary quality criterion is Elmendorf tear strength by ISO 6383-2. This application adds no independent processing complexity beyond the above constraints.
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Hanwha LLDPE 3305 is an extrusion-grade linear low-density polyethylene supplied in pellet form for blown film conversion. The nominal density of the unfilled polymer is 0.920 g/cm³ determined under ASTM D1505, and the melt flow rate at 190 °C under a 2.16 kg load is 0.55 g/10 min according to ASTM D1238. The resin is based on a butene-1 comonomer and a broad molecular weight distribution that raises melt strength relative to metallocene-catalyzed LLDPE of equivalent melt index. Differential scanning calorimetry per ASTM D3418 places the major melting peak near 122 °C; the Vicat softening point under ASTM D1525 is approximately 101 °C. These indices position 3305 as a film grade with moderate stiffness and high tear resistance, intended for monolayer and coextruded structures in the 20–80 µm gauge range. Published single-point mechanical data should be confirmed against the current manufacturer’s certificate of analysis because lot-to-lot variation in comonomer distribution can shift dart impact and tear values by up to 10–15%.
Rheologically, the grade exhibits shear-thinning behavior typical of broad molecular weight distribution butene-copolymer LLDPE. At 190 °C and apparent shear rate 100 s⁻¹, capillary rheometry indicates apparent viscosity between 1,200 and 1,800 Pa·s; at 1,000 s⁻¹, apparent viscosity falls below 400 Pa·s. These values are typical for a density of 0.920 g/cm³ and melt flow rate of 0.55 g/10 min; incoming-lot verification by cone-plate or capillary rheometry is recommended because comonomer distribution changes can shift low-shear viscosity by ±15%. Melt strength under extensional deformation is lower than that of LDPE but higher than many metallocene grades with similar density. The practical consequence is a need for internal bubble cooling and careful frost line control below 20 µm gauge.
Compared with autoclave LDPE film grades of similar density, the linear backbone of LLDPE 3305 raises tensile strength at break and Elmendorf tear strength at equivalent gauge. In comparative data reported for 25 µm blown film, LLDPE 3305 exhibits dart impact strength in the 90–130 g range under ASTM D1709, whereas a typical LDPE film resin of 0.922 g/cm³ density remains below 80 g. The absence of long-chain branching reduces melt extensional hardening; therefore 3305 requires narrower die gaps and higher blow-up ratios to stabilize the bubble. The broader molecular weight distribution of 3305 relative to metallocene-catalyzed LLDPE gives lower optical clarity but permits processing on conventional single-screw lines without severe melt-pressure fluctuations. At 25 µm, haze values near 10–14% under ASTM D1003 are typical for 3305, while metallocene LLDPE grades may remain below 4%. The seal initiation temperature of 3305 is approximately 105 °C, which is elevated relative to high-comonomer plastomers but consistent with butene-copolymer LLDPE film grades used in heavy-duty packaging.
Compared with high-density polyethylene of 0.950 g/cm³, 3305 has lower secant modulus but higher dart impact and tear strength. Tensile secant modulus at 1% extension under ISO 527-3 is approximately 220–260 MPa for 3305, whereas HDPE film can exceed 800 MPa. This modulus level reduces crinkle noise and improves soft-touch inner layer performance. Compared with polypropylene film, 3305 seals at temperatures 30–40 °C lower and remains ductile below -30 °C, making it suitable for frozen-food packaging without embrittlement.
| Property | Hanwha LLDPE 3305 typical | Typical LDPE film resin | Typical mLLDPE film resin | Test standard |
|---|---|---|---|---|
| Density | 0.920 g/cm³ | 0.922 g/cm³ | 0.918 g/cm³ | ASTM D1505 |
| Melt flow rate at 190 °C, 2.16 kg | 0.55 g/10 min | 0.25–0.5 g/10 min | 0.5–1.0 g/10 min | ASTM D1238 |
| Dart impact F50 | 110 g | 60–80 g | 180–240 g | ASTM D1709 Method A |
| Elmendorf tear strength MD | 120 g | 50–80 g | 180–220 g | ASTM D1922 |
| Haze | 12% | 6–9% | 2–4% | ASTM D1003 |
| Seal initiation temperature | 105 °C | 110 °C | 95–100 °C | ASTM F88 |
The values in Table 1 are typical ranges from supplier technical literature and are not lot-release specifications; blown film properties depend on blow-up ratio, frost line height, and extrusion temperature.
On blown film equipment using a grooved-barrier feed section and a single screw of L/D 25–30, 3305 is processed with a reverse temperature profile from 180 °C at the feed throat to 210 °C at the die. Barrel settings typically include Zone 1 at 170–180 °C, Zone 2 at 185–195 °C, Zone 3 at 195–205 °C, adapter at 205–210 °C, and die at 210–220 °C. Die gap settings of 1.5–2.5 mm and blow-up ratios from 2.2:1 to 2.8:1 produce balanced MD/TD orientation. Frost line height is normally maintained at 8–12 die diameters for 25–50 µm film to avoid excessive blocking and anisotropic tear resistance. Field data from cast and blown film lines indicate that melt temperatures above 240 °C promote low-molecular-weight volatilization and reduce bubble stability; sustained operation in that range is discouraged. At 0.55 g/10 min melt flow rate, die pressure on a 100 mm die with 1.5 mm gap can exceed 30 MPa. Older extruders should maintain motor torque margin above 80% of nameplate because screw speeds above 90 rpm on high-shear barrier designs can increase melt temperature by 10–15 °C relative to barrel set point. Screen packs of 60/100/60 mesh add 3–5 MPa backpressure; total backpressure above 35 MPa requires screw speed reduction or wider screen pack area.
Blending 15–25 wt% LDPE into 3305 reduces melt pressure and improves bubble stability in high-BUR production. The addition of branch-containing LDPE lowers extensional viscosity and allows frost line heights above 12 die diameters. Tensile strength at break is reduced by approximately 5–10% per 20 wt% LDPE addition, while dart impact remains above 90 g at 25 µm. Post-industrial reclaimed film from edge trims can be added up to 20 wt% without filtration below 100 µm; beyond this loading, die-lip deposit and gel count increase. Melt filtration with 80–120 µm mesh screens is required for reclaim streams. Inclusion of slip and antiblock masterbatches at 2–3 wt% lowers coefficient of friction to 0.15–0.25 under ASTM D1894; haze increases by 1–2%. Amine-based stabilizers are not recommended in high-temperature film lines because they can react with residual catalyst residues and raise gel formation.
Reclaimed film addition above 30 wt% reduces dart impact below 80 g and can raise gel area above 10 mm²/m² when assessed by optical gel counting. In silage film, UVA masterbatch with hindered amine light stabilizer at 0.4–0.6 wt% is typical; improper dispersion can lower tear strength by 15% due to additive agglomerates. Erucamide slip agent at 500–1,000 ppm achieves coefficient of friction 0.15–0.25 after 24 h aging, but migration to seal surfaces can reduce seal strength when levels exceed 1,500 ppm.
Primary applications include heavy-duty sacks, agricultural silage film, lamination films, frozen food packaging, and industrial liners. In silage wrap, puncture resistance under ASTM D5748 after simulated weathering is critical; 3305 is compounded with hindered amine light stabilizers at 0.3–0.6 wt% to maintain tear strength above 60% of original after 1000 h QUV aging per ASTM G154. For frozen food packaging, seal strength at 130 °C and 1 s dwell normally exceeds 8 N/15 mm under ASTM F88. The resin is also used as a core layer in heavy-duty sack coextrusions where dart impact of approximately 110 g per 25 µm sheet reduces puncture failures on automated packaging lines.
| Standard or regulation | Scope | Applicability and boundary condition |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers for food contact | Applicable when unfilled and used under conditions E through G; colorants and additives require separate clearance |
| EU 10/2011 | Plastic materials and articles for food contact | Overall migration below 10 mg/dm² under specified simulants; compliance depends on final film structure |
| REACH Regulation (EC) No 1907/2006 | Registration of monomer and additives | Natural grade supplied within EU registration status; imported compounds require additive disclosure |
| RoHS Directive 2011/65/EU | Heavy metal and brominated flame retardant restrictions | Conforms for lead, mercury, cadmium, hexavalent chromium, PBB and PBDE in unfilled natural resin |
Pre-drying is not normally required for sealed hopper trailers. Pellets stored in unheated warehouses at relative humidity above 60% should be purged with dry air at 70–80 °C for 2–3 h before extrusion to prevent surface moisture defects. For lamination and printing, surface energy treatment to 38–42 dyn/cm is required; the resin does not provide sufficient adhesion in its untreated state. The melt flow rate of 0.55 g/10 min limits thin-gauge extrusion below 15 µm because melt pressure increases and bubble stability declines on conventional lines.
Processing on tandem lines for heavy-duty sack film may require melt pump installation because downstream take-off speed fluctuations above ±2% cause gauge bands. If a melt pump is absent, extruder screw speed should be controlled within ±0.5 rpm to maintain film thickness tolerance ±5% at 40 µm gauge. Purging after gauge changes with HDPE or a commercial purge compound for 20–30 min reduces visual gel defects caused by stagnant die-lip regions.
