| HS Code | 488629 |
| Density | 0.918 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 1.0 g/10 min |
| Melting Point | 122 °C |
| Vicat Softening Temperature | 90 °C |
| Tensile Stress At Yield | 12 MPa |
| Tensile Stress At Break | 18 MPa |
| Elongation At Break | 550 % |
| Tensile Modulus | 300 MPa |
| Shore D Hardness | 50 |
| Brittleness Temperature | -70 °C |
As an accredited SABIC LLDPE 118N factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE 118N is delivered as solid granules in sealed 25 kg bags, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL loading of SABIC LLDPE 118N: secure palletized bags, protect from moisture, ensure even weight distribution for safe transport. |
| Shipping | SABIC LLDPE 118N is a linear low-density polyethylene resin supplied as free-flowing pellets. It ships in sealed bags, bulk bags, or railcars/trucks, protected from moisture and direct sunlight. Non-hazardous, it should be transported in clean, covered vehicles with adequate ventilation and stored in a dry, cool area. |
| Storage | Store SABIC LLDPE 118N in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep packaging tightly closed when not in use to prevent contamination. Avoid generating dust and ensure good housekeeping to reduce fire risks. No hazardous decomposition occurs under normal storage conditions. |
| Shelf Life | Store SABIC LLDPE 118N in dry, cool conditions away from direct sunlight; shelf life is typically two years from delivery. |
On heavy-duty sack lines, extrusion of SABIC LLDPE 118N exposes a conflict between melt strength and backpressure control. Published grade data list a nominal density of 0.918 g/cm³ measured under ISO 1183-1:2019 and a melt mass-flow rate of 1.0 g/10 min at 190 °C/2.16 kg measured under ISO 1133-1:2022; these values place the material in the butene C4 linear-low-density polyethylene class. The melt-flow rate is low enough to deliver film toughness but can raise specific energy consumption when the screw is run with excessively shallow grooved-feed section temperatures below 40 °C. Production equipment commonly comprises single-screw grooved-feed extruders with screw diameters from 55 mm to 90 mm and L/D ratios from 25:1 to 30:1; die gaps are set at 1.8 mm to 2.5 mm with blow-up ratios maintained at 2.0:1 to 2.8:1. Above BUR 2.8:1, bubble oscillation and contact-track defects appear on non-rotating dies. Melt temperature is held at 180 °C to 210 °C; sustained operation above 220 °C has been associated with oxidation gel and die-lip deposits on long runs. The converter’s compliance for industrial sack film is reviewed against EU Packaging Directive 94/62/EC and, where liner film may contact dry food, against FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm² for the finished printed laminate. For formulation, a 100 wt% 118N monolayer is feasible but not universal. A high-strength sack film usually starts with 70 wt% to 85 wt% 118N and 15 wt% to 30 wt% high-pressure LDPE to widen the processing window and increase dart drop resistance; edge-trim reclaim is introduced up to 15 wt% only after melt filtration through 80 µm to 120 µm screens. The terminal article includes gusseted industrial sacks, heavy-duty carrier bags, and liners for flexible intermediate bulk containers.
Reverse-printed flexible packaging laminates built with LLDPE 118N sealant webs present a different control problem because failure is no longer dominated by dart drop but by seal initiation, coefficient of friction, and corona treatment retention. In this track, 118N is first blown into a sealant web then adhesive-laminated to BOPP, BOPET, or aluminium foil; it is not extrusion-coated directly onto high-temperature substrates because the low melt index of 1.0 g/10 min makes draw-down and neck-in control less favourable than higher-MFR extrusion-coating grades. A three-layer blown film structure typically positions 118N in the core at 35 wt% to 50 wt% of total construction, with skin layers containing 3 wt% to 5 wt% combined slip and antiblock masterbatch. Published data for 118N-specific sealant blends is limited; converter trials should be based on a factorial design across seal bar temperature, dwell time, and pressure. The blown film operation uses die gaps of 1.6 mm to 2.2 mm, blow-up ratios of 2.0:1 to 2.5:1, and melt temperatures of 185 °C to 205 °C to limit gel formation. Corona treatment is applied at 38 mN/m to 42 mN/m, but surface energy decays under storage and should be re-verified within 24 h before adhesive lamination. Food-contact status of the final laminate is determined under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520; a complete migration test on the finished multi-material laminate is required when the sealant contacts aqueous or fatty foods. Terminal formats include reverse-printed stand-up pouches, frozen food pillow packs, and dry-food zipper bags.
| Application | Standard/test designation | Converter audit focus |
|---|---|---|
| Heavy-duty sack film | ISO 527-3, ASTM D1709, EU 94/62/EC | Tensile, dart drop, packaging recovery obligations |
| Lamination sealant web | EU 10/2011, FDA 21 CFR 177.1520, ASTM F88/F88M | Overall migration, seal strength |
| Agricultural silage cover | EN 13207, ISO 4892-2 | Weathering, tear propagation |
| Refuse sacks | ASTM D1709, ASTM D1922, REACH 1907/2006 | Dart drop, tear, SVHC control |
Agricultural silage cover conversion imposes a mechanical hierarchy in which puncture propagation and low-temperature tear after UV aging dominate the specification, not seal initiation. For monolayer silage cover film, a common starting-point formula loads 118N at 65 wt% to 75 wt%, high-pressure LDPE at 20 wt% to 30 wt%, and carbon black or white UV masterbatch at 3 wt% to 5 wt%; the UV stabilizer package is not supplied by the resin grade and must be matched to the expected service life. Extruders are usually 65 mm to 90 mm grooved-feed machines with die gaps from 1.8 mm to 2.4 mm and blow-up ratios from 2.2:1 to 2.8:1 to produce wide layflat in the range of 6 m to 14 m. Compliance is assessed under EN 13207, with weathering validation performed according to ISO 4892-2; the article is not automatically food-contact compliant because carbon black masterbatch and UV stabilizers may exceed migration limits under EU 10/2011. Terminal products include silage bunker covers, silage bags, and livestock feed storage liners.
High-output refuse sack lines place more stress on bubble stability and melt fracture control than industrial sack lines because the target gauge is thinner and the output rate is higher. A refuse sack compound based on 118N may be run at 100 wt% virgin resin when tear resistance is the primary specification, but high-output lines typically add 10 wt% to 20 wt% high-pressure LDPE or calcium carbonate masterbatch to control melt pressure and reduce extensional viscosity; clean recycled LLDPE film scrap is introduced up to 20 wt% only after melt filtration through 100 µm to 140 µm screens. Die gaps are set between 1.4 mm and 2.0 mm, blow-up ratios are kept at 2.5:1 to 3.0:1, and melt temperatures are held between 180 °C and 200 °C. High blow-up ratios increase transverse direction tear but reduce machine direction dart impact, so any down-gauge below 12 µm requires verification according to ASTM D1709 for dart drop and ASTM D1922 for Elmendorf tear. Regulatory obligations include EU Packaging Directive 94/62/EC and REACH Regulation (EC) No 1907/2006 for substances of very high concern; a food-contact claim does not apply unless the final article is explicitly validated under FDA 21 CFR 177.1520. Terminal formats include star-sealed bin liners, drawstring refuse sacks, and institutional clear bags.
Continuous fill-and-seal systems convert 118N film under the strictest thickness tolerance because jaw closing force is set for a narrow band, and thickness variation outside ±8 % can produce leak paths or crinkle seals. Coextruded FFS film often uses a core fraction of 50 wt% to 60 wt% 118N, with skins containing 2 wt% to 4 wt% slip and antiblock masterbatch; additive loading is a process compromise because high slip reduces seal integrity while low slip causes tracking errors. The blown film process uses die gaps of 1.8 mm to 2.2 mm, blow-up ratios of 2.0:1 to 2.5:1, and automatic gauge control with segmented air rings; melt temperatures are limited to 185 °C to 205 °C because higher temperatures have been observed to generate die-lip deposits and gel defects during extended runs. Compliance for petrochemical and fertilizer bag film includes EU Packaging Directive 94/62/EC and internal tensile and tear specifications of the filling operation; seal strength is verified according to ASTM F88/F88M. Terminal products include form-fill-seal bags for fertilizer, plastic granulate, salt, and dry pet food.
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Designated as a butene-1 linear low density polyethylene resin, SABIC LLDPE 118N is supplied for blown film extrusion where a balance of melt strength, draw-down capability and puncture resistance is required. The polymer is characterized by a nominal melt flow rate of 1.0 g/10 min when measured according to ISO 1133-1:2022 at 190 °C under 2.16 kg, and a nominal density of 918 kg/m³ according to ISO 1183-1:2019. The grade designation is consistent with a density near 0.918 g/cm³ and a melt index near 1.0 g/10 min; the suffix N identifies the formulation and additive package. The resin is supplied as free-flowing pellets containing antioxidant, slip and antiblock additives, with the specific additive levels governed by destination-market requirements and lot-specific certificates of analysis.
Nominal resin properties published by the manufacturer are limited to melt flow rate and density; film-level mechanical values are strongly dependent on gauge, blow-up ratio, frost line height and die gap. For incoming quality control, the melt flow rate is determined by ISO 1133-1:2022 or ASTM D1238-20, while density is determined by ISO 1183-1:2019 or ASTM D1505-18. The table below consolidates the primary specification interface for resin purchasers. For film mechanical properties, values should be generated on a specific extrusion line because no single set of published film data can represent every downstream configuration.
| Parameter | Test standard | Nominal value |
|---|---|---|
| Melt flow rate | ISO 1133-1:2022 / ASTM D1238-20, 190 °C, 2.16 kg | 1.0 g/10 min |
| Density | ISO 1183-1:2019 / ASTM D1505-18 | 918 kg/m³ |
| Film dart impact | ASTM D1709-22, method A/B depending on thickness | Published data for this specific configuration is limited |
| Elmendorf tear | ASTM D1922-15 | Published data for this specific configuration is limited |
| Tensile properties | ISO 527-3:2018 | Published data for this specific configuration is limited |
On single-layer and coextrusion blown film lines using extruders with L/D ratios of 25:1 to 30:1 and spiral mandrel dies, starting process conditions for SABIC LLDPE 118N generally place the melt temperature between 185 °C and 225 °C. A die gap of 1.2 mm to 2.3 mm is common, with the narrower end reserved for high-output grooved-feed extruders because shear heating raises melt temperature and reduces bubble stability. The recommended blow-up ratio is 2.0:1 to 3.0:1, with frost line height maintained between 6 to 10 die diameters for film gauges from 25 µm to 80 µm. At screw speeds above 90 rpm on a 65 mm extruder, melt pressure and torque can become the primary output constraints; using a grooved feed section or increasing barrel cooling in the feed zone reduces melt-temperature overshoot but may increase screw wear. Gauge uniformity is sensitive to die lip cleanliness and air-ring stability; film processed with a frost line too low relative to die diameter can develop TD gauge bands and reduced optical clarity because surface crystallization occurs before orientation is complete.
At melt temperatures above 225 °C, the antioxidant package is consumed more rapidly, increasing oxidation risk and gel formation; at temperatures below 185 °C, the resin may exhibit poor homogenization and sharkskin melt fracture on the mandrel. The onset of melt fracture is influenced by die land length and shear rate; a die land ratio of 10:1 to 15:1 is common for this resin class. When head pressure exceeds 350 bar on a 90 mm extruder, the bubble is prone to pulsing because pressure fluctuations alter die flow distribution. Use of a fluoropolymer processing aid masterbatch at 200–500 ppm can reduce die lip buildup and postpone melt fracture; the exact level must be optimized with ASTM D1894-14 coefficient of friction because excessive processing aid migrates to the seal layer and reduces seal strength. Melt pressure before the screen changer is commonly maintained between 250 bar and 350 bar for spiral mandrel dies; when the pressure exceeds 400 bar, the screen pack should be replaced to avoid local polymer degradation. The resin is typically processed with a screen pack configuration of 20/40/60/80 mesh on small extruders and 40/60/80/100 mesh on high-output lines. Gauge control is improved with a dual-lip air ring rather than a single-lip design because the cooling air velocity can be adjusted independently of bubble support pressure. Melt temperature measured at the adapter should be recorded at least every 30 minutes during production to detect gradual screw wear or feed throat obstruction.
In formulations where a fractional-melt high-pressure LDPE is partially replaced by SABIC LLDPE 118N at 10–20 wt%, the linear backbone increases tensile strength and puncture resistance at comparable film gauge, allowing downgauging in heavy-duty shipping sacks and agricultural films. The improvement is assessed by ASTM D1709-22 dart drop and ISO 527-3:2018 tensile testing; however, the exact gain depends on die gap, blow-up ratio and frost line. A die gap below 1.5 mm may reduce the toughness advantage because higher shear stress and orientation in the machine direction lower transverse tear as measured by ASTM D1922-15. The lower melt strength of the LLDPE component compared with tubular LDPE also requires a stabilized bubble and may necessitate a reduced stalk height or a higher frost line when the blend exceeds 20 wt% LLDPE. Industrial lines with automated air-ring control and internal bubble cooling are better able to maintain gauge stability under these conditions.
Relative to metallocene LLDPE grades of similar melt index and density, SABIC LLDPE 118N produced with a conventional multisite catalyst system exhibits a broader molecular weight distribution, which reduces extruder head pressure and improves melt fracture resistance but lowers dart impact and Elmendorf tear at equivalent gauge. Compared with hexene- or octene-copolymer LLDPE, the butene comonomer in SABIC LLDPE 118N produces shorter short-chain branches, which reduce tie-molecule entanglement and can depress puncture resistance under high-speed impact. This structural difference is measurable with ASTM D5748-19 puncture testing, although published data for this specific configuration is limited. The processing advantage is most visible on older single-lip air-ring lines where the broader molecular weight distribution of SABIC LLDPE 118N tolerates a wider frost line range without bubble instability, whereas narrow-molecular-weight metallocene grades may require internal bubble cooling and tighter tension control.
| Attribute | SABIC LLDPE 118N | High-pressure LDPE | Metallocene LLDPE | Hexene/octene LLDPE |
|---|---|---|---|---|
| Comonomer | Butene-1 | None or minor | Butene/hexene | Hexene/octene |
| Molecular weight distribution | Broad | Broad with long-chain branching | Narrow | Broad to narrow |
| Melt strength | Moderate | High | Low to moderate | Moderate |
| Dart impact at equal gauge | Moderate | Lower | Higher | Higher |
| Elmendorf tear | Moderate | Lower | Higher | Higher |
| Extruder head pressure at same MFR | Moderate | Low | High | Moderate |
| Film haze | Moderate | Low | Low | Low to moderate |
Capillary rheometry according to ISO 11443:2021 provides shear viscosity data that primary melt flow rate measurements cannot replace. For SABIC LLDPE 118N, the apparent shear viscosity at 190 °C declines as shear rate increases from 10 s⁻¹ to 1000 s⁻¹, but the slope is less steep than for long-chain branched LDPE because the linear backbone lacks significant extensional hardening. The onset of sharkskin on a spiral mandrel die can be associated with shear rates above 800 s⁻¹ in the die land region; the exact threshold depends on die lip surface finish and molecular weight distribution. Flow instability can be mitigated by raising the die temperature to 210 °C or by reducing screw speed, but raising the die temperature without raising the barrel set point creates a nonuniform melt stream and may increase die lip deposit formation. A twin-bore capillary rheometer with an orifice die of 1 mm diameter and 16 mm length is recommended for lot-release rheology benchmarking because bagging and pressure loss corrections are included in ISO 11443:2021.
Typical downstream applications for SABIC LLDPE 118N include agricultural silage covers, greenhouse films, heavy-duty shipping sacks, laminated pouches, consumer carry bags and industrial liners. In these structures the grade is selected for film toughness and seal integrity rather than optical clarity; film haze as measured by ASTM D1003-13 is typically higher than for metallocene LLDPE. In coextruded structures, SABIC LLDPE 118N is used as a core layer where its melt strength and gauge uniformity support a metallocene skin; seal initiation is governed by the skin layer material and is tested according to ASTM F88/F88M-21. For silage covers, the film must resist puncture from stalk ends and maintain tear propagation resistance under outdoor weathering; carbon black masterbatch addition at 2–4 wt% is common but requires dispersion verification because undispersed carbon black reduces dart impact and increases gel count. In heavy-duty sacks, film thickness commonly ranges from 80 µm to 150 µm, with the dart impact requirement specified by ASTM D1709-22 and tensile energy to break by ISO 527-3:2018. The use of SABIC LLDPE 118N as a core layer in a three-layer sack can permit a reduction of 10–15% in total thickness compared with a single-layer LDPE sack, provided the blow-up ratio and frost line height are re-optimized. In agricultural silage covers, carbon black dispersion and additive package retention are monitored by ISO 4892-2:2013 artificial weathering and ASTM D1922-15 tear retention. Published data for this specific configuration is limited, and field aging remains the reference method for UV stabilizer selection.
Film tensile, tear and impact properties should be generated using conditioned specimens and standardized test geometry. For tensile testing, ISO 527-3:2018 specifies specimen width and initial gauge length; for dart impact, ASTM D1709-22 requires a specified dart head diameter and drop height, with failure defined as rupture of the film. Test results are not absolute resin properties because film orientation from the blown film process creates anisotropic mechanical response. A film produced at 25 µm with 2.5:1 blow-up ratio may exhibit higher machine-direction tensile yield than a 50 µm film produced at 2.0:1 blow-up ratio due to greater molecular orientation. Elmendorf tear measured by ASTM D1922-15 is particularly sensitive to orientation; comparative evaluations must control film gauge to within ±2 µm and report blow-up ratio, die gap, melt temperature and frost line height alongside the standard test code. Similarly, dart drop data should be collected on at least 20 specimens per condition to account for the statistical nature of impact failure.
Storage of SABIC LLDPE 118N below 60 °C in sealed containers minimizes additive migration and pellet agglomeration. The resin does not require pre-drying before extrusion when sacks remain closed and ambient relative humidity is below 60%; if opened sacks are exposed to higher humidity for more than 24 h, surface moisture can generate micro-voids at the die lip and reduce film clarity. The polymer should not be blended with amine-based or strongly acidic additive masterbatches without compatibility testing, because additive antagonism can shift the coefficient of friction measured by ASTM D1894-14 and destabilize the slip/antiblock package. Food-contact compliance is not automatically granted by the resin manufacturer; converters must submit the final film for overall migration testing under EU Regulation (EU) No 10/2011 or verify olefin polymer status under 21 CFR 177.1520 using the specific additive formulation and thickness. Published data for this specific configuration is limited for some end-use exposure conditions, including high-temperature food contact above 70 °C and fatty-food simulants.
