| HS Code | 533654 |
| Density | 0.931 g/cm³ |
| Melt Flow Index 190 C 2 16 Kg | 20 g/10 min |
| Melting Point | 121 °C |
| Vicat Softening Point | 88 °C |
| Tensile Strength At Yield | 13 MPa |
| Elongation At Break | 200 % |
| Flexural Modulus | 300 MPa |
| Shore D Hardness | 55 |
| Brittleness Temperature | -70 °C |
| Izod Impact Strength Notched 23 C | 7 kJ/m² |
As an accredited HANWHA LLDPE 3120 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as free-flowing pellets in 25 kg polyethylene-lined woven bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for HANWHA LLDPE 3120: 25kg bags on shrink-wrapped pallets, securely loaded for safe transport. |
| Shipping | HANWHA LLDPE 3120 is shipped as virgin plastic resin pellets in sealed bags, bulk bags, or railcars. It is non-hazardous under normal transport, requiring dry, ventilated conditions and protection from moisture, heat, and contamination. Handle carefully to avoid bag damage and keep away from ignition sources during transit. |
| Storage | Store HANWHA LLDPE 3120 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep in original, unopened packaging to prevent moisture absorption and contamination. Avoid excessive stacking heights or mechanical damage to bags. No special storage conditions are required, but good housekeeping minimizes dust accumulation and fire risk. |
| Shelf Life | HANWHA LLDPE 3120 has an indefinite shelf life when stored in dry, cool conditions away from direct sunlight and moisture. |
On high-stalk extrusion lines with a 60 mm grooved-feed screw and L/D 30:1, HANWHA LLDPE 3120 is processed as a monolayer or three-layer skin component for frozen food packaging and heavy-duty liners. The grade carries a nominal melt flow rate of 2.0 g/10 min at 190 °C under 2.16 kg load per ISO 1133-1:2022 and a nominal density of 0.918 g/cm³ per ASTM D1505. The practical melt temperature window is constrained by the comparatively low melt tension of butene-based LLDPE compared with LDPE. Frost line height is maintained at 3.5 to 4.0 die diameters to prevent bubble wander and melt resonance. A die gap of 1.8 mm to 2.2 mm is retained because narrower die gaps increase shear stress at the die lip and reduce bubble tear resistance in thin-gauge film below 25 µm. Melt temperatures above 215 °C reduce back pressure but also increase oxidation during extended runs. The preferred barrel profile for a 60 mm extruder is 170 °C feed, 185 °C compression, 195 °C metering, and 200 °C die zone, while screen pack pressure is monitored below 350 bar. For heavy-duty frozen food packaging at 70 µm, a blend of 80 wt% LLDPE 3120 and 20 wt% LDPE with a melt flow rate of 0.75 g/10 min stabilizes neck height and increases bubble geometry consistency. The LDPE addition shifts the storage modulus at 190 °C upward, but the blend still requires confirmation under EU Regulation (EU) No 10/2011 for food contact if the total migration limit of 10 mg/dm² is not exceeded under the intended simulant conditions. Falls of dart impact below 300 g at 70 µm per ASTM D1709 Method A are usually traceable to excessive melt temperature or insufficient frost line residence time rather than raw resin variability. Long-run failure modes on actual monolayer lines include bubble instability at afternoon ambient temperature rises above 28 °C, which alters air ring cooling efficiency and requires frost line height correction.
A cast pallet unitization line configured with a 75 mm 33:1 L/D extruder and a 2,200 mm coat-hanger die is typically started at 240 °C to 245 °C melt temperature when HANWHA LLDPE 3120 is processed as the base polymer for machine-grade stretch film at 23 µm. The density of 0.918 g/cm³ and the relatively narrow molecular weight distribution reduce draw resonance, but chill roll temperature must be kept below 25 °C to prevent cling additive migration to the roll contact surface. The film is treated with a tackifier at 1.0 wt% to 2.5 wt% polyisobutylene or 2.0 wt% to 3.0 wt% of an ultra-low-density ethylene-octene plastomer to obtain a cling force of 350 g to 500 g per ASTM D5458 after 24 h aging at 23 °C and 50% RH. The base resin without tackifier produces measurable cling force mainly through surface roughness and electrostatic charge, and the value is not sufficient for pallet loads above 25 kg. On a 1,500 m/min production line, extruder output must be matched to chill roll speed to prevent film gauge variation greater than ±3%, measured by scanning capacitance gauge and verified by ISO 4593. Film tensile properties at 23 µm typically fall in the range of 25 MPa to 35 MPa tensile strength in the machine direction with elongation at break above 400% per ASTM D882. Published data for this specific formulation configuration is limited, and line-level trials are required to confirm process capability. The addition of butene-based LLDPE 3120 to a stretch film formulation is operationally constrained by its comparatively low strength retention after pre-stretch beyond 200%. Films are therefore not normally used for pre-stretch systems above 250% elongation unless blended with 20 wt% to 30 wt% metallocene polyethylene or octene LLDPE.
In twin-screw compounding operations, HANWHA LLDPE 3120 functions as a polyolefin carrier resin for carbon black and additive masterbatches at loadings between 30 wt% and 50 wt%. The melt flow rate of 2.0 g/10 min provides sufficient melt viscosity at 190 °C to wet pigment agglomerates in the side-feeding zone. A co-rotating twin-screw extruder with L/D 44:1 and a screw speed of 450 rpm to 600 rpm is operated with a barrel profile from 160 °C in the feed zone to 200 °C at the die. Melt temperature is held at 210 °C to 220 °C to reduce carrier viscosity without exceeding the decomposition threshold of the selected antioxidant package. Carbon black masterbatch at 40 wt% loading requires an atmospheric or vacuum vent downstream of the side-feeder to remove moisture and low molecular weight volatiles. Residual moisture above 200 ppm in the carbon black feedstock causes die-lip deposit and pellet surface roughness. Filter pressure upstream of the die plate should not exceed 120 bar when a 80/120 mesh multilayer screen pack is used. Pelletizing by underwater die-face cutting at 190 °C water temperature yields cylindrical granules with acceptable bulk density for gravimetric blending. The carrier resin contributes to the dilution of additive loadings in final film extrusion. A masterbatch containing 40 wt% carbon black must therefore be added to a film line at 3 wt% to 5 wt% to achieve a final carbon black concentration of 1.2 wt% to 2.0 wt%, verified by ash content per ISO 3451-1 and not by visual inspection alone. Batch-to-batch variance in carrier melt flow rate above ±0.2 g/10 min can shift screen pack pressure and wetting behavior, so incoming lot certificates should be checked against the compounding line control limits.
When a five-layer agricultural silage outer web is downgauged from 25 µm to 19 µm, HANWHA LLDPE 3120 is blended with EVA containing 18% vinyl acetate at a ratio of 60 wt% LLDPE 3120 to 20 wt% EVA and 20 wt% white masterbatch to maintain opacity and mechanical resistance during bale wrapping. The film is processed on a three-layer blown film coextrusion line with a 250 mm spiral mandrel die and a blow-up ratio of 2.0:1 to 2.4:1. The LLDPE-rich layer is placed in the core and outer skin, while EVA-rich layers provide sealability. A HALS package of 0.15 wt% to 0.30 wt% and a benzophenone or triazine UV absorber of 0.10 wt% to 0.20 wt% are introduced via a 10 wt% carrier additive masterbatch. The resulting film is expected to retain tensile elongation above 400% after 1,500 h of accelerated weathering under ISO 4892-2 Method A, although outdoor failure data for this exact formulation is limited and must be established by field exposure in the target farm environment. Gauge uniformity across the web is monitored by ISO 4593, and the film is evaluated for puncture resistance under ASTM D5748 to reduce failure from corn stalk penetration. The use of LLDPE 3120 at 60 wt% lowers seal initiation temperature relative to pure LLDPE film but raises the oxygen transmission rate slightly. A silage film target is normally set at 15,000 cm³/m²·day·atm or lower at 23 °C and 0% RH per ASTM D3985. If the oxygen barrier falls outside specification, a 5 wt% to 10 wt% EVOH barrier layer with tie resin is introduced rather than reducing film thickness further. Processing bottlenecks occur when ambient relative humidity exceeds 70%; the EVA-rich layer absorbs surface moisture and produces bubble instability unless the resin supply hopper is purged with dehumidified air at 50 °C for 2 h before startup.
Extrusion lamination trials on a 90 mm single-screw extruder with a 300 mm T-slot die have demonstrated that HANWHA LLDPE 3120 can be run as a sealant web at coating weights from 15 g/m² to 25 g/m² when melt temperature is held between 310 °C and 325 °C. The density of 0.918 g/cm³ improves low-temperature sealability but increases neck-in compared with LDPE at equivalent melt temperature. Die-to-laminator nip distance must be reduced to 120 mm to 150 mm and the edge trimming system adjusted for 4 mm to 6 mm additional neck-in per side. Adhesion to treated polyester film is achieved at an offline corona surface energy of 44 mN/m to 48 mN/m and an ozone concentration of 40 mg/m³ to 60 mg/m³ at the air gap. Under these conditions, peel adhesion measured by ASTM D1876 commonly exceeds 4 N/15 mm when the sealant is combined with a primed aluminum foil substrate. For flexible packaging intended for aqueous and acidic foods, the coated web is specified under 21 CFR 177.1520(c) paragraph 2 conditions of use C through G and EU Regulation (EU) No 10/2011 overall migration limits of 10 mg/dm². Compliance testing is performed in 3% acetic acid and 10% ethanol simulants for 10 days at 40 °C per EN 1186-1. A processing defect observed on pilot lines is the formation of edge beads when melt temperature falls below 305 °C, producing coating weight variation above ±2 g/m² and unacceptable seal transfer on vertical form-fill-seal lines. Screw design with L/D 33:1 and a mixing tip is preferred because the resin does not require pre-drying at ambient relative humidity below 60%. Above 60% RH, surface moisture on cold pellets entering the feed throat can cause surging and is removed by a 60 °C dehumidified hopper air purge for 2 h before startup.
In coextruded heavy-duty shipping sacks for polymer granules and light bulk solids, HANWHA LLDPE 3120 is combined with high-density polyethylene at 30 wt% to 40 wt% HDPE to increase modulus and reduce creep under stack load. A three-layer blown film line with a 200 mm die and die gap of 2.0 mm runs at a blow-up ratio of 2.0:1 and a frost line height of 800 mm to 1,100 mm, producing a final film thickness of 80 µm to 120 µm. The blend requires the same extrusion profile as a 100% LLDPE 3120 line, but the addition of HDPE raises die pressure by 10% to 15% and necessitates screen pack changes after 400 h rather than 600 h when hard antistatic masterbatch is present. Weld seams of hot-sealed side gussets are tested in accordance with ASTM F88/F88M-21 and must withstand seal strength greater than 45 N/25 mm before drop testing of filled sacks under ISO 7965-2. Stacking trials at 40 °C and 70% RH are necessary because flexural creep of LLDPE-rich blends increases with temperature. A sack with 25 kg granular payload should not be stored above 4 pallet layers without separator sheets. This application does not require additional slip agent if the coefficient of friction is below 0.50 by ISO 8295. High-ambient-humidity warehouses above 70% RH cause surface tack and require 500 ppm to 1,000 ppm erucamide slip additive in the outer skin.
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HANWHA LLDPE 3120 is specified as a linear low-density polyethylene pellet for blown film and thin-gauge cast film conversion. The material is typically controlled to a nominal melt mass-flow rate of 1.0 g/10 min at 190 °C under 2.16 kg load when tested in accordance with ISO 1133-1:2022 Method A, and a nominal density of 0.920 g/cm³ when measured by ISO 1183-1:2019 Method B. The resin is differentiated from high-pressure low-density polyethylene by its linear ethylene backbone and short-chain branching distribution derived from alpha-olefin comonomer insertion. When the 3120 designation is produced as a butene-copolymer film grade, the molecular weight distribution is broad enough to permit stable bubble operation on conventional single-screw blown-film lines but narrow enough to maintain tensile elongation at thin gauge. The certificate of analysis for the specific lot must be consulted for final acceptance limits because manufacturer-published product-class target values do not replace lot-specific QC data.
In film conversion, the grade is used where a balance of puncture resistance, machine-direction tear strength, and seal integrity is required. Typical applications include heavy-duty shipping sacks, industrial liners, carrier-bag film, agricultural silage stretch film, and lamination base webs. These applications are not assigned without verification; the final film must be assessed against the end-use specification because processing history, gauge, blow-up ratio, and regrind level alter mechanical performance independently of resin properties.
The short-chain branching content of the 3120 class directly governs the density reduction from the 0.960 g/cm³ high-density polyethylene baseline. A density of 0.920 g/cm³ corresponds to a crystallinity level typically below 50% when measured by differential scanning calorimetry according to ISO 11357-3:2018. The lower crystallinity reduces melting peak temperature and broadens the melting endotherm, which influences both sealing and heat resistance. A broad endotherm with a secondary lower-temperature shoulder is characteristic of butene-copolymer LLDPE and is not an indication of contamination when observed in the first heating scan.
The 3120 grade is distinguished from high-pressure LDPE by the absence of long-chain branching and by the presence of short-chain branches introduced through alpha-olefin comonomer. At equivalent melt index and density, the linear resin exhibits higher tensile strength at break and higher dart impact strength than LDPE because the linear backbone and the tie-molecule population transmit stress across the crystalline lamellae more effectively. The same structural difference reduces melt strength and extensional strain hardening, which makes bubble stability more sensitive to die gap and air-ring setting. Compared with a metallocene-catalysed LLDPE of similar melt index, the 3120 resin class has a broader molecular weight distribution and a broader comonomer distribution, which improves shear-thinning behaviour and reduces screw-pressure fluctuation but can increase haze and reduce hot-tack peak strength.
Table 1 provides class-typical values for a 1.0 g/10 min, 0.920 g/cm³ Ziegler-Natta butene-copolymer LLDPE evaluated as 40 µm blown film. Values are class-typical and are not a substitute for the manufacturer’s certificate of analysis.
| Property measured | Test standard | Class-typical target or range |
|---|---|---|
| Melt mass-flow rate at 190 °C, 2.16 kg | ISO 1133-1:2022 Method A | 1.0 g/10 min ± 0.1 g/10 min |
| Density at 23 °C | ISO 1183-1:2019 Method B | 0.920 g/cm³ ± 0.002 g/cm³ |
| Tensile strength at break, MD/TD, 40 µm film | ISO 527-3:2018 | 35–45 MPa / 30–40 MPa |
| Elongation at break, MD/TD, 40 µm film | ISO 527-3:2018 | 600–800% / 700–900% |
| Elmendorf tear resistance, MD/TD, 40 µm film | ISO 6383-2:1983 | 40–80 N/mm / 70–120 N/mm |
| Dart impact F50, 40 µm film | ASTM D1709-16a Method A | 90–150 g |
| Oxidation induction time at 200 °C | ISO 11357-6:2018 | minimum 20 min for pellet-stabilised lots |
Because the 3120 grade sits at the lower end of the LLDPE density range, it provides higher dart impact and lower secant modulus than 0.926 g/cm³ octene grades. The reduction in stiffness must be considered in bag-making and automatic filling lines where film rigidity controls puckering and misregistration. A converter measuring 1% secant modulus according to ISO 527-3:2018 on 40 µm film should compare the result against the filling machine specification rather than assume that all LLDPE grades are interchangeable.
The broader molecular weight distribution of a Ziegler-Natta butene-copolymer resin gives the 3120 grade a lower shear-thinning exponent than a typical metallocene hexene grade. The reduction in shear viscosity at high die shear rates lowers the onset of flow instability compared with a narrow-distribution resin. On a spiral mandrel die, the critical die-lip shear stress for sharkskin at 190 °C is often reached when the die-lip shear rate exceeds 500 s⁻¹; raising the die temperature to 210 °C and increasing the die gap can delay the onset of surface roughness. If die-lip shear stress exceeds 0.2 MPa, surface roughness must be managed by formulation or tooling rather than by melt-temperature reduction alone.
Dart impact strength for the 3120 grade is conventionally measured on 40 µm blown film after conditioning at 23 °C and 50% relative humidity according to ISO 291:2008. When tested in accordance with ASTM D1709-16a Method A, the class-typical F50 value falls between 90 g and 150 g; the measured result depends on frost-line height, blow-up ratio, and draw-down ratio. Puncture energy determined by ASTM D5748-19 is commonly higher than that of a high-pressure LDPE film of equal density and thickness because the linear backbone distributes puncture stress across a larger deformation volume. The exact difference must be confirmed by comparative tests on the same bubble geometry.
For a 40 µm film produced at a 2.5:1 blow-up ratio, the machine-direction tensile strength typically exceeds 35 MPa, while transverse direction tensile strength is lower by 10% to 20% because of orientation effects. The difference between machine and transverse direction elongation increases with draw-down ratio and must be controlled when the film is used for stretch-wrapped loads. A converter should measure both directions according to ISO 527-3:2018 after conditioning for 40 h; single-direction data are insufficient for specification setting.
Thermal resistance is a function of the stabiliser package rather than the base polymer alone. If the 3120 grade is processed on a cast-film line at melt temperatures above 240 °C, the oxidation induction time must be re-verified on extruded pellets because extended residence time can consume phenolic and phosphite antioxidants. A minimum OIT of 20 min at 200 °C is a typical inline control point for polyethylene extrusion stabilisation, but end-use packaging for fatty foods may require higher retained OIT after extraction testing according to EN 1186-1:2002.
Haze for a 40 µm film made from a Ziegler-Natta butene LLDPE is typically higher than that of a metallocene hexene grade but lower than a high-pressure LDPE at the same density. If the application specifies haze below 8% measured by ASTM D1003-21, the 3120 grade may require blending with an optical grade or optimisation of frost-line height and die temperature. Gloss at 60° is similarly process-dependent and should be included in first-article qualification.
When the 3120 grade replaces a long-chain-branched LDPE at identical melt index, the shear viscosity under extrusion conditions is higher at low screw speeds and lower at high screw speeds because of the narrow molecular weight distribution and the absence of long-chain branching. On a 65 mm single-screw extruder with an L/D ratio of 30:1 and a barrier-type screw, melt pressure at a constant screw speed may drop by 10% to 20% at the same die gap, but motor load can rise if the feed section is not cooled. The actual change is equipment-specific and must be established with a pressure transducer at the breaker plate.
Blown-film bubble stability is more sensitive to the ratio of die gap to final film thickness than in high-pressure LDPE. A die gap of 1.8 mm to 2.3 mm is typically selected for a final gauge of 25 µm to 80 µm, with a blow-up ratio between 2.2:1 and 2.8:1. Running below 1.5 mm die gap at high draw-down ratios above 4:1 increases the risk of unstable frost-line oscillation and bubble wobble because the melt strength of the linear resin does not increase with extension as strongly as LDPE.
In blown-film operations, the 3120 grade is commonly blended with high-pressure LDPE at ratios from 10% to 30% by weight to improve bubble stability and increase melt strength, but this blend reduces the dart impact and puncture toughness of the film. A 20% LDPE addition can lower dart impact by 15% to 25% relative to the unblended 3120 film when tested according to ASTM D1709-16a Method A, depending on the LDPE melt index. The converter should not exceed 30% LDPE if low-temperature seal strength and tear resistance are critical because the blend morphology shifts from a continuous linear phase to a co-continuous structure at high addition, altering failure mode from ductile deformation to mixed-mode fracture.
For the 3120 grade, a barrier-flighted single-screw with a length-to-diameter ratio of 30:1 to 33:1 and a compression ratio of 3:1 is commonly selected. The screw should include a Maddock or spiral mixer section to homogenise melt temperature and reduce unmelts, but excessive shear from high Maddock clearances below 0.25 mm can raise melt temperature and degrade antioxidants. On a 55 mm extruder, melt temperature increase across the screw at 120 rpm should be kept below 15 °C relative to barrel set temperature; higher increases indicate shear work is being converted to melt-temperature rise rather than dispersion.
On a laboratory heat sealer with independent upper and lower jaw temperatures, the 3120 film exhibits a seal initiation temperature below 100 °C at a 2.0 s dwell and 0.4 MPa jaw pressure when tested according to ASTM F88/F88M-21. The hot-tack strength reaches a usable level within 15 °C of the seal initiation window. These values shift upward when the formulation is blended with high-pressure LDPE or recycled post-industrial film; every 10% mass addition of a density-equivalent LDPE can increase seal initiation by 5 °C to 10 °C and reduce hot-tack strength at high jaw separation speeds. Converters must establish the alloying limit on their own sealers because laboratory dwell time and jaw temperature profile differ from packaging-line conditions.
In coextruded structures, the 3120 grade is often employed as a core or seal layer. When paired with a metallocene skin layer, the difference in melt viscosity must be matched by adjusting the individual extruder temperature profiles rather than by increasing the die pressure. A viscosity mismatch greater than 2:1 at the shear rate of the die can cause interfacial instability and layer-thickness non-uniformity. Melt flow ratio is not a sufficient predictor because it does not capture the shear-rate dependence of viscosity; capillary rheometry according to ISO 11443:2021 is required for robust layer matching.
Additive migration from film made with the 3120 grade is not regulated by the base resin designation alone; it is a function of the entire formulation, film thickness, food type, temperature, and contact time. The converter must verify the final article against the applicable migration test method in the target market. Table 2 summarises the usual regulatory instruments and the required verification pathway for olefin polymer packaging.
| Regulatory area | Reference instrument or test method | Verification requirement |
|---|---|---|
| US food-contact olefin polymers | FDA 21 CFR 177.1520 | Base resin must meet density and extraction limits; final film must comply with end-use conditions A–H. |
| EU plastic food-contact materials | Regulation (EU) 10/2011 and EN 1186-1:2002 | Overall migration limit of 10 mg/dm²; specific migration limits for authorised additives. |
| Heavy metals in packaging | Directive 94/62/EC | Sum of lead, cadmium, mercury, and hexavalent chromium not to exceed 100 ppm by weight. |
| REACH SVHC communication | Regulation (EC) 1907/2006 Article 33 | No substance of very high concern present above 0.1% w/w without notification. |
| RoHS hazardous substances | Directive 2011/65/EU | Applicable only if the film becomes part of electrical and electronic equipment; lead 1000 ppm, cadmium 100 ppm. |
The product is supplied as low-dust cylindrical pellets. It is not hygroscopic, but condensation on pellet surfaces in cold warehouses can introduce surface moisture into the feed throat and reduce extrusion output. When the resin is stored at 5 °C or below and moved to a warm production hall, the pellets should be allowed to equilibrate for 4 h to 6 h before conveying, or the hopper should be fitted with a dry-air purge. Pellet surface moisture above 0.05% by weight, measured by ISO 15512:2019, can produce surface defects in cast film and reduce output stability.
The grade is not recommended for prolonged contact with strong oxidising acids, aromatic solvents, or oily food simulants at elevated temperature without specific migration testing. When fatty food contact is intended, the final film must be evaluated under EN 1186-1:2002 contact conditions with olive oil or 95% ethanol simulant as specified in Regulation (EU) 10/2011. The base resin certificate does not by itself establish compliance of the converted film.
For a 50 µm agricultural silage film, the critical properties are puncture resistance after repeated stretching and cling performance. While the 3120 resin can supply the required toughness, cling additives and polyisobutylene migration are formulation-dependent and are not provided by the base resin. A field-ageing test under UV exposure according to ISO 4892-2:2013 Method A is required because film stabilisation and cling performance can degrade before the mechanical properties of the base resin are exhausted.
