| HS Code | 501069 |
| Density | 0.920 g/cm³ |
| Melt Flow Rate | 2.0 g/10min |
| Melting Point | 122 °C |
| Vicat Softening Temperature | 100 °C |
| Tensile Strength At Yield | 12 MPa |
| Tensile Strength At Break | 35 MPa |
| Elongation At Break | 600 % |
| Flexural Modulus | 320 MPa |
| Shore Hardness | 54 Shore D |
| Brittleness Temperature | -70 °C |
As an accredited INEOS LLDPE LL6208LJ factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | INEOS LLDPE LL6208J is supplied as free-flowing pellets in 25 kg bags, palletized and shrink-wrapped for safe handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL container loading of INEOS LLDPE LL6208LJ, securely packed and stowed for safe, efficient transport. |
| Shipping | INEOS LLDPE LL6208LJ is shipped as free-flowing pellets in sealed bulk bags, woven sacks, or hopper containers. It is non-hazardous but requires dry, clean conditions to prevent moisture pickup and contamination. Store away from direct heat and handle with standard conveying equipment to maintain product integrity. |
| Storage | Store INEOS LLDPE LL6208LJ in a dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed and protected from physical damage. Avoid dust accumulation and contact with strong oxidizers. No special temperature control is required, but maintain moderate ambient conditions to preserve product quality. |
| Shelf Life | Shelf life is indefinite when stored indoors, protected from heat, sunlight, and moisture, in original packaging. |
At a 75 mm grooved-feed extruder with a 30:1 L/D barrel and a 250 mm spiral mandrel die, LL6208LJ is processed for heavy-duty shipping sacks and FIBC liners at a melt temperature of 195–210 °C measured at the screw tip through a flush-mounted thermocouple. The die gap is set at 1.8–2.4 mm, blow-up ratio is held between 2.5:1 and 3.0:1, and frost line height is maintained at 350–600 mm above the die face. Back pressure before the screen changer normally remains in the range of 280–350 bar; output on a 75 mm line with a single-lip air ring is typically 130–170 kg/h, and the same line equipped with internal bubble cooling can usually achieve 15–20% higher throughput at equivalent frost line height. Gauge spread across a 500 mm flattened width is controlled within ±5% by regulating air-ring damper position and internal bubble cooling supply at 15–25 m³/h. Post-collapsing-frame web tension is set at 8–12 N per 500 mm width to avoid permanent deformation before gusseting and winding. At film thicknesses between 100 µm and 150 µm, tensile properties are measured in accordance with ASTM D882, and dart impact is evaluated by ASTM D1709-22 Method A. Because LL6208LJ has a melt mass-flow rate of 2.0 g/10 min at 190 °C and 2.16 kg per ISO 1133-1:2022, its melt strength is lower than fractional-MFR butene LLDPE grades; a blow-up ratio above 3.5:1 on a conventional single-lip air ring tends to produce gauge bands and intermittent bubble flutter. Published data for the exact dart impact value of LL6208LJ in this specific heavy-duty sack structure is limited; the converter should verify lot-specific values against the supplier technical datasheet before specifying a minimum F50 value in customer-facing documentation.
Cast stretch film produced from LL6208LJ on a 900 mm slot die with a 0.5 mm die gap and a 100 mm air gap is normally extruded at 240–250 °C to suppress melt fracture and minimise die-lip build-up during long runs. Chill roll temperature is held at 18–22 °C, with the secondary chill roll set 2–4 °C lower to prevent roll blocking. Line speed is typically 350–500 m/min for 12–23 µm gauge, but edge tear becomes sensitive to neck-in at the higher end of this speed range. When the air gap exceeds 15 mm, web neck-in increases beyond the normal edge trim allowance of 10–15 mm per side, and trimmed edges carry residual draw-induced orientation that can propagate cracks during pre-stretch on automated pallet wrappers. Puncture resistance of the finished film is evaluated by ASTM D5748, while cling performance is measured by ASTM D5458-95 peel cling; target cling force on high-speed rotary wrapping machines is commonly 200–400 g/15 mm, depending on machine-specific film feed. LL6208LJ is frequently blended with 10–30% of a metallocene plastomer or a higher-alpha-olefin LLDPE to raise stretch force and puncture resistance in down-gauged film; the butene comonomer structure of LL6208LJ alone may not provide sufficient dart impact at 12 µm on high-speed lines. Slip migration from an erucamide-containing masterbatch to the film surface requires 24–72 h of roll aging at 23 ± 2 °C; fresh film measured before 24 h will exhibit higher coefficient of friction and lower peel cling than fully aged film. Storage of finished rolls above 30 °C accelerates slip bloom but can cause uneven migration and blocking near the core.
In three-layer coextruded laminates, LL6208LJ is positioned as a 15–25 µm sealant layer against a polyethylene-based core and outer layer on a 250 mm three-layer blown-film die with a layer distribution of 20/60/20. Seal initiation temperature for a 0.920 g/cm³ density LLDPE sealant web typically falls between 95 °C and 105 °C at 0.5 s dwell and 0.14 MPa bar pressure; hot-tack strength measured per ASTM F1921-12 may exceed 1.5 N/15 mm at 115 °C, but published LL6208LJ-specific hot-tack curves for this exact structure are limited. A critical operational boundary is the migration of erucamide from outer or core layers into the sealant layer during roll storage; converter records on high-speed vertical form-fill-seal equipment show that after 7 days of roll storage, seal strength at 0.2 s dwell can decrease by approximately 0.05–0.10 N/15 mm due to slip additive accumulation at the seal surface. Where high seal integrity is required, the sealant layer should be specified without high-slip additives, while the core or outer layers carry the external slip package. Coefficient of friction is evaluated by ISO 8295:1995, seal strength by ASTM F88/F88M-21, and density by ISO 1183-1:2019 immersion method. The following compliance matrix applies to food-contact flexible packaging structures using LL6208LJ as a sealant web.
| Regulation or standard | End-use condition | Test method or requirement |
|---|---|---|
| EU No 10/2011 | Food contact in flexible packaging | Overall migration limit 10 mg/dm²; additives must be on the Union list |
| FDA 21 CFR 177.1520(c) | Olefin polymers for food contact | Density range 0.85–1.00 g/cm³; extraction limits by food type and condition of use |
| REACH EC No 1907/2006 | Polymer substance | Polymer exemption under Article 2(9); monomers and additives must be registered |
| RoHS 2011/65/EU | Electrical and electronic equipment | Restricted substances at maximum concentration values in homogeneous material |
| ISO 1133-1:2022 | Melt mass-flow rate | 190 °C, 2.16 kg load |
| ASTM F1921-12 | Hot-tack measurement | Heat-seal temperature, 0.5 s dwell, 0.14 MPa pressure |
Frozen food packaging lines operating at -25 °C require blown film with adequate low-temperature dart impact resistance and consistent seal integrity after condensation exposure. LL6208LJ with a nominal density of 0.920 g/cm³ and a melt mass-flow rate of 2.0 g/10 min is drawn on a 55 mm extruder with a 26:1 L/D barrel and a 160 mm die at a 2.8:1 blow-up ratio to a thickness of 40–60 µm. Die gap is set at 1.8 mm, melt temperature at 200 °C, and frost line height at 400 mm above the die. Low-temperature Elmendorf tear strength is measured by ASTM D1922-23; machine-direction tear resistance of butene LLDPE film of this density class generally remains suitable for corner puncture in frozen vegetable bags, but the converter must verify lot-specific data because published LL6208LJ low-temperature impact values for this exact frozen-food structure are limited. Surface condensation during pack filling increases effective blocking; an antiblock package based on synthetic silica at 1,000–1,500 ppm is used to control blocking force, measured by ASTM D3354-18. For packaging speeds above 60 bags/min, seal bar release after 0.2 s dwell requires hot-tack strength above 0.8 N/15 mm; process control logs from vertical form-fill-seal equipment identify dwell below 0.2 s as a critical operational boundary for this MFR class. Film-to-film coefficient of friction after 48 h of aging is monitored by ISO 8295:1995; target COF is normally 0.10–0.25 to prevent feeding misalignment on freezer-grade packaging machines.
Down-gauging on a high-output refuse sack line places LL6208LJ in a melt-fracture-sensitive regime when the die gap remains above 2.0 mm. On a 65 mm extruder with a 24:1 L/D barrel and a 180 mm die, the converter reduces the die gap to 1.2–1.4 mm and raises melt temperature to 210–220 °C; this shifts the onset of sharkskin to higher output but simultaneously lowers bubble stability because of the relatively low melt strength of a 2.0 g/10 min MFR butene LLDPE. At blow-up ratios above 3.0:1, the bubble develops gauge bands and occasional flutter under low internal bubble cooling air volumes of 10–15 m³/h. To maintain dart impact and tear resistance at 8–12 µm thickness, LL6208LJ is blended with 20–30% of a C6-LLDPE or 5–15% of an mLLDPE; this compensates for the lower plateau modulus of the butene copolymer under high extension rates. Extruder back pressure should remain below 380 bar; higher values frequently indicate gel accumulation on the screen pack or excessive screw speed. Post-gusseting tension is set at 5–7 N per 500 mm width to avoid splitting at the fold lines. Terminal refuse sacks are tested by ASTM D1709-22 Method A for F50 dart impact and by ASTM D1922-23 for Elmendorf tear. Conversion trials indicate that the 8 µm gauge can be reached with acceptable performance only with a tight die gap and higher-alpha-olefin blending; published data for unblended LL6208LJ in this specific down-gauged structure is limited.
Collation overwrap film extruded from LL6208LJ at 25–35 µm thickness requires a low coefficient of friction only after 24–72 h of roll storage because erucamide migration kinetics in LLDPE matrices are time-temperature dependent. Testing per ISO 8295:1995 on fresh film aged at 23 °C shows that kinetic COF can remain above 0.45 during the first 24 h and falls to 0.10–0.25 after 72 h; at warehouse temperatures above 30 °C, the migration rate roughly doubles, while at 10 °C bloom is significantly retarded. High-speed shrink overwrap machines require stable COF below 0.25 to avoid film misfeeds and registration errors, so LL6208LJ should be conditioned for 72 h at 23 ± 2 °C before use or an external slip masterbatch should be incorporated into the core layer during coextrusion. Blocking force is evaluated by ASTM D3354-18; blocking force above 20 g/100 mm² may cause split-roll unwinding and film breakage on bundling equipment. Terminal products include beverage multipack overwrap and paper-towel bundle wrap, where consistent coefficient of friction and controlled blocking are more critical than high clarity. Published data for the specific slip package of LL6208LJ in overwrap structures should be verified against the supplier formulation disclosure, because additive concentration and film aging conditions determine whether the film reaches machine-ready COF within the required staging window.
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INEOS LLDPE LL6208LJ is a butene-comonomer linear low-density polyethylene supplied as free-flowing pellets for blown film extrusion. Nominal density is 0.920 g/cm³ when determined according to ISO 1183-1:2019 or ASTM D1505, and nominal melt flow rate is 0.80 g/10 min at 190 °C under a 2.16 kg load when measured according to ISO 1133-1:2022 or ASTM D1238. The resin is produced via a Ziegler-Natta polymerization route rather than a metallocene route. The resulting broader molecular weight distribution relative to metallocene linear low-density polyethylene influences extrusion back pressure, melt fracture behavior, and solid-state tear anisotropy. The density fixed at 0.920 g/cm³ places the grade in the middle of the linear-low-density range, where stiffness is higher than a 0.918 g/cm³ butene grade but lower than a 0.935 g/cm³ medium-density grade. In commercial film converting, the product is specified where controlled drawdown, impact resistance, and output stability are required rather than maximum optical clarity or high-temperature structural performance.
Thermal analysis by differential scanning calorimetry at 10 K/min heating rate typically records the principal melting endotherm between 122 °C and 124 °C, with crystallization onset between 106 °C and 108 °C on cooling at the same rate. Vicat softening temperature is commonly observed in the range 92 °C to 96 °C under 10 N load with ISO 306:2022 method A50. These thermal values define the upper service limit for occasional hot-fill or shrink-tunnel exposure, but continuous exposure above 90 °C produces progressive deformation under load. The rheological response of LL6208LJ is shear thinning across the extrusion shear-rate window from 100 s⁻¹ to 1,000 s⁻¹. Because the backbone is predominantly linear, melt strength is lower than that of long-chain branched LDPE; this characteristic reduces bubble stability at high blow-up ratios but also lowers back pressure in melt filtration systems. Prolonged residence time above 220 °C accelerates oxidative gel formation and should be avoided. The recommended melt temperature for blown film extrusion is 190 °C to 220 °C, with a maximum cylinder profile of 230 °C in zones closest to the die.
| Property | Test method | Typical value |
|---|---|---|
| Density | ISO 1183-1:2019 / ASTM D1505 | 0.920 g/cm³ |
| Melt flow rate (190 °C, 2.16 kg) | ISO 1133-1:2022 / ASTM D1238 | 0.80 g/10 min |
| Principal melting point | ISO 11357-3:2018 | 122–124 °C |
| Vicat softening point | ISO 306:2022, A50 | 92–96 °C |
On a single-layer blown film line equipped with a 70 mm grooved-feed extruder, a 250 mm annular die, a 1.8 mm die gap, and a dual-lip air ring, LL6208LJ is typically run with a barrel profile of 180 °C to 210 °C, a melt temperature at the adapter of 205 °C to 215 °C, and a blow-up ratio of 2.2:1 to 2.8:1. Under these conditions, film gauge variation measured by a traversing capacitance gauge normally remains within ±5 % of target thickness. Frost line height is held between 1.5 and 2.5 die diameters; a lower frost line accelerates quench and reduces clarity, while a higher frost line increases crystalline orientation and can improve dart impact but makes the bubble more sensitive to room air turbulence. Die lip build-up is observed after 8 h to 24 h of continuous extrusion, depending on additive package and melt temperature; cleaning intervals should be based on measured haze increase or surface defect counts rather than fixed production time.
When melt temperature falls below 185 °C, sharkskin melt fracture can appear at the die lip as the wall shear stress approaches the critical level for linear polyethylene. Raising the melt or die temperature by 5 °C to 10 °C usually removes the defect unless the die gap is smaller than 1.5 mm. At the opposite extreme, melt temperatures above 230 °C increase gel counts and can produce a detectable oxidized odor in the film, particularly when residence time exceeds 20 min. On a 90 mm single-screw extruder with a 200 mm die, the resin has been observed to reach stable output at screw speeds of 60 rpm to 80 rpm with specific energy input near 0.20 kWh/kg to 0.24 kWh/kg. The actual values depend on screw design, back pressure, and melt filtration.
At a film thickness of 50 µm and a blow-up ratio of 2.5:1, film produced from this type of 0.920 g/cm³ butene LLDPE commonly exhibits tensile stress at yield between 10 MPa and 12 MPa in the machine direction and between 9 MPa and 11 MPa in the transverse direction when tested according to ISO 527-3:2018 at 500 mm/min. Elongation at break is typically greater than 600 % in the machine direction and greater than 700 % in the transverse direction. Dart impact strength measured by method A of ISO 7765-1:1988 is generally recorded between 120 g and 160 g for 50 µm film. Elmendorf tear strength according to ISO 6383-2:1983 is commonly between 30 N/mm and 50 N/mm in the machine direction and between 40 N/mm and 60 N/mm in the transverse direction. These ranges are not intrinsic resin constants; they depend strongly on die gap, blow-up ratio, frost line height, and additive levels. Published data for this specific configuration is limited, so converter-side film testing should be used for specification limits.
Property development in LLDPE blown film is not isotropic. The bubble is stretched in the machine direction by the nip speed and in the transverse direction by the blow-up ratio; the ratio of these deformation rates determines the balance between machine-direction tear and transverse-direction tear. For LL6208LJ, increasing the blow-up ratio from 2.0:1 to 3.0:1 raises transverse-direction tear strength while lowering machine-direction tear strength. A high-stalk process, with an elevated frost line, increases machine-direction orientation and can produce film suitable for collation shrink where transverse shrinkage is desired. In shrink film applications, film extruded with a blow-up ratio above 2.5:1 can show transverse-direction shrinkage of 15 % to 25 % at 120 °C in a hot-air oven, while machine-direction shrinkage remains below 10 %. This anisotropy is exploited in collation shrink and overwrap but must be controlled by downstream annealing if stable dimensions are required.
Compared with a branched low-density polyethylene of similar melt index, LL6208LJ gives higher tensile strength, higher elongation at break, and higher dart impact resistance in film form when tested according to ISO 527-3:2018 and ISO 7765-1:1988. The linear backbone raises tensile properties but reduces melt strength, narrows the stable blow-up ratio, and increases sensitivity to draw resonance. Against a metallocene linear low-density polyethylene of equivalent density, LL6208LJ generally exhibits a broader molecular weight distribution. This improves high-shear extrusion and melt fracture resistance but yields lower gloss, higher haze, and more anisotropy in tear performance. Metallocene grades are normally preferred when superior hot-tack and low-temperature sealability are required. LL6208LJ is selected when output, bubble tolerance, and cost per kilogram dominate the decision. The butene comonomer also places the grade below hexene LLDPE in slow puncture and Elmendorf tear resistance, especially at film thicknesses below 40 µm. Within the producer’s LLDPE family, the 0.002 g/cm³ density increment over a 0.918 g/cm³ butene film grade raises tensile modulus by roughly 15 MPa to 20 MPa and shifts seal initiation temperature by 3 °C to 5 °C.
| Criterion | LL6208LJ | LDPE | mLLDPE |
|---|---|---|---|
| Melt strength | Moderate | High | Low to moderate |
| Bubble stability | Moderate to high | High | Low to moderate |
| Dart impact | High | Moderate | Highest |
| Haze | Moderate | Low | Lowest |
| Extrusion back pressure | Moderate | Low | High |
In practice, the output difference between LL6208LJ and a metallocene grade at the same extruder screw speed is material because the broader distribution of LL6208LJ reduces melt pressure before the die. A comparative trial on a 65 mm grooved-feed extruder showed die pressure of approximately 320 bar to 360 bar for LL6208LJ at 180 kg/h, whereas a metallocene grade of the same melt index ran 20 bar to 40 bar higher. This pressure reduction allows higher throughput before the extruder reaches its maximum pressure limit, although it does not necessarily improve layer distribution in coextrusion. These values should be verified by in-line pressure transducers and are not a substitute for screw-specific performance mapping.
Film produced from LL6208LJ is used in carrier bags, industrial liners, agricultural films, and frozen food packaging at gauge from 25 µm to 120 µm. Carrier bag film is typically surface treated to 38 mN/m to 42 mN/m for flexographic or rotogravure ink adhesion, measured according to ISO 8296. Hot-bar seal initiation occurs near 95 °C to 105 °C, with plateau seal strength developing above 120 °C. Kinetic coefficient of friction is typically recorded between 0.15 and 0.25 when tested according to ISO 8295, depending on slip additive migration and storage time. In frozen food packaging, puncture resistance at -20 °C is satisfactory, but notched tear resistance becomes the limiting mechanical property. Sharp fold lines and excessive transverse-direction draw during bag formation should therefore be avoided.
The seal performance of LL6208LJ differs from LDPE in two ways. First, the seal initiation temperature is typically 5 °C to 10 °C lower because the linear chains and short-chain branches allow faster interdiffusion across the seal interface. Second, the hot-tack strength is generally lower than that of an LDPE seal layer at the same temperature because of the broader molecular weight distribution and the lower melt elasticity. In convertible packaging, the seal layer is therefore often a blend of LDPE and LL6208LJ rather than the pure resin. A blend with 30 % to 40 % LDPE lowers seal initiation temperature by a few degrees while preserving the mechanical strength contribution of the LLDPE core. The exact blend ratio is set by the required seal-through-contamination performance and the hot-fill temperature of the packaged product.
In coextruded structures, LL6208LJ is normally placed in the core or in one functional skin layer to raise mechanical strength while LDPE skin layers preserve bubble stability and seal response. A typical three-layer configuration uses 20 % LDPE in each outer layer and 60 % LL6208LJ in the core. On a 350 mm die with a 2.0 mm die gap and a 2.5:1 blow-up ratio, stable operation is maintained at 180 kg/h to 220 kg/h when the core-layer melt temperature is held 5 °C to 10 °C above the skin-layer melt temperature to equalize viscosity. If the layer viscosity ratio deviates beyond 1.5:1, interfacial instabilities appear as wavy melt streams and gauge bands. LL6208LJ does not contain acid-copolymer tie layers, so direct coextrusion with polyamide or EVOH without an adequate adhesive resin is not recommended; interfacial peel strength falls below practical packaging requirements. When an adhesive tie layer is used, the structure should be tested according to ASTM F88 or a 90° peel method adapted from ISO 527-3 to verify that the failure mode is not clean delamination.
Optical properties are determined by resin structure, process conditions, and additives. LL6208LJ does not provide the gloss and clarity of a metallocene linear low-density polyethylene. At 50 µm thickness, a blown film with a 2.5:1 blow-up ratio and a 1.8 mm die gap commonly shows haze between 8 % and 15 % and 45° gloss between 40 and 60, measured according to ISO 14782:1999 and ISO 2813:2014. The values worsen with lower blow-up ratio and lower melt temperature, which increase surface roughness. Clarifying additives are not part of the standard formulation.
From a regulatory perspective, the base polymer is typically listed under EU Regulation 10/2011 for food contact when the final article meets the migration limits set out in Annex II; converters must confirm the specific INEOS compliance certificate for the actual batch and additive package. The grade is not supplied for extended outdoor exposure without a separate UV stabilizer masterbatch, because the base stabilization package is formulated for processing and short-term warehouse storage rather than multi-year service. Moisture uptake of the pellets is low, but condensation during cold storage can introduce surface water; if relative humidity exceeds 60 %, a hopper dryer set at 60 °C to 80 °C for 2 h is sufficient to restore surface dryness without altering the additive package. REACH and RoHS status should be checked against the current INEOS product safety sheet, as recycled content variants and lot-specific additive changes are not captured by a single generic statement.
