| HS Code | 256801 |
| Product | SABIC LLDPE P118 |
| Resin Type | Linear Low Density Polyethylene (LLDPE) |
| Density | 0.918 g/cm³ |
| Melt Flow Rate | 1.0 g/10 min (190°C/2.16 kg) |
| Melting Temperature | 122 °C |
| Vicat Softening Temperature | 92 °C |
| Tensile Strength At Yield | 11 MPa |
| Tensile Strength At Break | 16 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 260 MPa |
| Shore D Hardness | 45 |
| Brittleness Temperature | -70 °C |
| Escr | >1000 h |
As an accredited SABIC LLDPE P118 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE P118 supplied as virgin pellets in 25 kg bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL of SABIC LLDPE P118: 25 kg bags shrink-wrapped on pallets, ~20 MT per container, secured for safe transit. |
| Shipping | SABIC LLDPE P118 is a non-hazardous linear low-density polyethylene resin, supplied as free-flowing pellets. It ships in multilayer paper bags, jumbo bags, or bulk hopper trucks/containers. Keep dry and away from direct heat; store below 50°C. No dangerous goods classification for standard transportation by sea, rail, or road. |
| Storage | Store SABIC LLDPE P118 in a cool, dry, well-ventilated area away from direct sunlight, ignition sources, and extreme heat. Keep original packaging sealed to prevent contamination and moisture pickup. Avoid contact with strong oxidizers. No special storage hazards exist under normal conditions; maintain good housekeeping to prevent dust accumulation. |
| Shelf Life | Store in original, dry, cool conditions away from direct sunlight; shelf life is typically indefinite when stored and handled properly. |
SABIC LLDPE P118 is supplied at a nominal density of 0.918 g/cm³ (ISO 1183-1:2019) and a melt flow rate of 1.0 g/10 min (ISO 1133-1:2022, 190 °C/2.16 kg). In heavy-duty liner and industrial packaging applications, the material is processed on high-output blown-film lines with a barrier feed screw and an L/D ratio not less than 30:1. The die gap is held between 1.8 mm and 2.5 mm; below 1.8 mm, the higher die shear raises the risk of sharkskin melt fracture on the bubble surface, particularly at output rates above 220 kg/h on a 350 mm die. The melt temperature at the die is normally set between 195°C and 220°C. Processing outside the upper boundary triggers oxidative chain scission and smoke generation, while operation below 190°C increases back pressure and produces visible die lines. A blow-up ratio of 2.0:1 to 3.0:1 is used to balance machine-direction and transverse-direction tensile strength; at BUR below 2.0:1, the film becomes anisotropic and splits along the machine direction during destaticized converting. The frost line is fixed at 6 to 9 die diameters to prevent bubble sway and to set the crystalline orientation before nip collapse. Heavy-duty liners at 100 µm to 150 µm thickness are tested according to ASTM D6988 for gauge distribution, with a typical specification of ±6% across the web. Puncture propagation resistance is assessed with ASTM D5748, because slow puncture, rather than tensile yield, is the dominant field failure in industrial waste bags. Elmendorf tear is measured to ASTM D1922 in both MD and TD; the TD tear commonly limits the tolerable downgauging. The butene comonomer in P118 gives a broader interlamellar amorphous region than metallocene grades, but its dart impact under ISO 7765-1 Method A is lower than a comparable octene LLDPE at the same density and MI. Converters compound 2–3 wt% of a 15–20 wt% slip/antiblock masterbatch to prevent blocking in winders; excessive anti-block above 3 wt% is avoided because it degrades dart impact and clarity.
On multi-layer blown-film lines producing agricultural mulch and greenhouse covers, P118 is blended with LDPE and EVA to control tear initiation and film softness. A standard three-layer structure for a 25 µm mulch film uses a core of P118 at 60–70 wt%, skin layers of LDPE at 20–30 wt%, and a carbon black masterbatch let down at 6–8 wt% to achieve 2.5–3.0 wt% carbon black in the finished film. The carbon black dispersion is checked by ISO 11420 or by microscopic count of undispersed agglomerates exceeding 5 µm. For greenhouse film of 150 µm, a hindered amine light stabilizer is incorporated at 0.3–0.5 wt% with a benzophenone or triazine ultraviolet absorber at 0.2–0.4 wt%; both additions are compounded in a P118 carrier because the resin’s 0.918 g/cm³ density produces a lower melting plateau that assists additive distribution in a 190–205°C melt. Tensile break retention after accelerated weathering is evaluated under ISO 4892-2 with a xenon arc source and a black-panel temperature of 65°C. The specification commonly requires at least 50% retained elongation at break after 3000 h; formulations based on butene LLDPE normally satisfy this at the stated HALS loading, while octene grades are needed when the retained elongation target is above 70%. Haze and total light transmission are measured to ASTM D1003, with greenhouse film requiring a haze below 20% and a total transmission above 88% after initial stabilization. Experience on conventional blown-film lines shows that frost line height must be lowered by 15–20% relative to clear packaging film when carbon black is present, because the pigmented film quenches more slowly and develops a wider crystalline morphology that raises film blocking.
Cold-chain film for frozen meat, seafood, and controlled-temperature logistics uses P118 where a heat-seal layer must remain ductile at or below -18°C. The resin is coextruded as a 10–20% skin layer on a three-layer structure with a high-density or medium-density core for stiffness. Low-temperature dart impact is determined after conditioning at -18°C for 24 h using ISO 7765-1 Method A or ASTM D1709 Method A; the absolute failure mass varies with film gauge, but the ductile-brittle transition is normally reported as a function of impact speed and clamp geometry. The butene branch length in P118 restricts low-temperature crack propagation resistance relative to an octene LLDPE of identical density; therefore, for deep-freeze applications below -25°C, converters frequently substitute an octene resin or add a plastomer at 10–20 wt% to the sealant layer. Published data for this specific configuration is limited, because low-temperature dart impact is strongly influenced by coextrusion layer ratio, frost line height, and weld zone dwell time. Heat-seal initiation is determined with a crimp sealer at 0.5 N/mm² contact pressure and 0.5 s dwell; butene LLDPE of 0.918 g/cm³ density typically initiates sealing between 90°C and 105°C, but the exact starting point for P118 must be verified on the target capper because jaw thickness alters heat transfer. Hot-tack strength is measured using ASTM F1921 after a 100 ms seal time at 120°C. On vertical form-fill-seal lines running above 60 packages/min, insufficient hot tack causes seal popping after filling, especially at the gusset fold. The P118 skin layer is also corona-treated to 38–42 mN/m, with surface energy verified by ASTM D2578, before lamination to a reverse-printed barrier substrate.
Thin-gauge t-shirt bags and promotional shopping sacks made predominantly from P118 are extruded at a film thickness of 15–25 µm and converted on high-speed bag-making lines with photoelectric seal registration. The blown film bubble is produced with a die gap of 1.5–2.0 mm and a blow-up ratio of 2.5:1–3.5:1, which increases transverse-direction tear resistance around the punched handle area. The frost line height is kept at 4–7 die diameters because a lower frost line quenches the film more rapidly and reduces blocking at the collapsing frame. Tensile properties are measured to ASTM D882 at a crosshead speed of 500 mm/min; a typical 20 µm film produced from butene LLDPE in this density range shows a machine-direction elongation at break above 400%, but exact values for P118 depend on the anti-block loading and the drawdown ratio. Dart impact is tested by ISO 7765-1 Method A, and handle tear resistance is evaluated by cutting a 25 mm notch and pulling at 180° according to an in-house tear propagation protocol because no single international standard captures the t-shirt bag handle geometry. A recurring field failure is handle propagation after the film has been folded twice and heat-pressed; the tear initiates at the fold line and follows the extrusion direction. To reduce failure, the bubble is rotated to randomize gauge bands, and the film is slit with a razor blade rather than a shear blade to minimize edge nicks. Corona treatment is not applied for plain carrier bags, but printed bags require a surface tension of 38–40 mN/m verified by ASTM D2578 immediately before the press. The bag-making line uses a seal temperature of 130–150°C and a dwell time of 0.4–0.8 s; seal strength is checked on the bottom gusset by ASTM F88 with a 25.4 mm strip at 300 mm/min.
Because the 1.0 g/10 min melt flow rate of P118 maintains a stable bubble geometry at thin-layer ratios, the resin is selected for core and skin layers in three-layer blown-film structures where the converter needs to reduce film blocking while retaining low seal initiation. The layer distribution is typically 20/60/20 or 25/50/25, with P118 in the skins and LDPE in the core. The die design is a spiral mandrel with a nominal die gap of 1.5–2.0 mm; skin-layer melt is run at 200–215°C to avoid viscoelastic mismatches with the LDPE core. Seal strength is measured according to ASTM F88 on 25.4 mm strips separated at 300 mm/min; a common minimum seal strength is 8 N/25 mm after 0.5 s dwell at 110°C. Hot-tack data from ASTM F1921 is used to set the vertical form-fill-seal operating window; the maximum acceptable hot-tack decay occurs when the seal is opened within 100 ms at a peel angle of 90°. Interlayer adhesion is tested with ASTM F904 after lamination, and the coextruded film should fail cohesively in the P118 skin layer rather than delaminate at the tie layer, confirming weld-line integrity. The resin is also used as a carrier for color concentrates let down at 3–5 wt%; excessive color concentrate above 6 wt% is avoided because it lowers coefficient of friction measured by ISO 8295 and can reduce heat-seal initiation by increasing surface roughness. In tissue overwrap, the film is processed with a P118 skin layer at 15 µm; the primary field failure is web splitting caused by insufficient chill-roll water flow, not by resin deficiency.
Stretch hood packaging uses P118 in blends with higher melt strength LDPE and a plastomer to produce a film that is drawn down over a pallet load and then retracts to hold the load under compression. The film is blown on a spiral mandrel die with a die gap of 1.8–2.2 mm and a BUR of 2.0:1–3.0:1, at a total thickness of 60–100 µm. The resin contributes toughness and tear resistance to the film, but its butene branch structure does not supply the very low permanent set required for high-retraction hood systems; the permanent set after 100% elongation is generally higher for P118 than for a metallocene or octene plastomer of equal density. Elastic recovery is measured on 15 mm wide strips strained to 50% or 100% elongation for 60 s and then relaxed for 60 s, using the procedure given in ASTM D5459 for machine-direction stretch film. The typical formulation for load unitization is 60–70 wt% P118, 20–30 wt% LDPE, and 5–10 wt% plastomer; cling is achieved by adding 0.5–1.5 wt% polyisobutylene or a coextruded cling layer rather than by modifying the P118 base. Puncture propagation resistance under ASTM D5748 is the critical quality parameter because pallet edges and nail heads act as stress concentrators during hood application. Converters report that gauge variation in the film must be controlled within ±8% or the pallet corners show indent printing and localized whitening. Published data for this specific configuration is limited, so the blend ratio is adjusted on the stretch hood machine by measuring the force needed to remove the hood from a standard pallet at 500 mm/min crosshead speed and by checking the film’s residual compression after 24 h at 23°C.
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SABIC LLDPE P118 is a butene-copolymer linear low-density polyethylene resin supplied as free-flowing pellets for tubular blown film extrusion. The grade is characterized by a nominal density of 0.918 g/cm³ and a melt flow rate of 0.8 g/10 min when measured at 190 °C under a 2.16 kg load in accordance with ISO 1133-1:2022 and ASTM D1238. The short-chain branching introduced by the butene comonomer reduces crystalline perfection relative to an ethylene homopolymer of similar density, which improves tear propagation resistance and provides acceptable film optics when the bubble is quenched sufficiently. Typical end uses include general-purpose packaging film, thin-gauge carrier bags, industrial liners, agricultural film, and coextruded sealant layers where a balance between seal initiation temperature and mechanical strength is required. The resin is produced on a licensed low-pressure polymerisation unit; the specific catalyst system and reactor configuration are proprietary to SABIC, but the resulting molecular architecture is consistent with a butene-copolymer LLDPE having a moderately narrow molecular weight distribution.
Because this grade is not supplied with a high-slip or anti-block designation in its base form, converter-side masterbatch addition may be required for high-speed bag-making lines. Friction and blocking behaviour should be evaluated according to DIN EN ISO 8295 and ASTM D3354 rather than inferred from resin specification alone. Published data for the coefficient of friction of P118 in specific film structures is limited; the converter should generate film data at target gauge and additive loading.
Compared with C6- and C8-based linear low-density polyethylene grades, SABIC LLDPE P118 exhibits a lower tie-chain population at equivalent density because butene branching is less efficient at separating crystallisable ethylene sequences. This molecular difference is observed industrially as lower puncture resistance and lower dart drop impact values, but also as easier bubble stabilisation on low-to-medium-output blown film lines. In side-by-side monolayer blown film evaluations at 40 µm, P118 typically exhibits a dart drop impact value around 110 g when tested by ASTM D1709 Method A, whereas an equivalent C8 metallocene-catalysed LLDPE of the same density may exceed 300 g. The tensile yield stresses of P118 at 40 µm are normally in the range of 10 MPa to 12 MPa in both machine and transverse directions under ISO 527-3; elongation at break values above 500 % are expected.
Relative to high-pressure LDPE homopolymers, P118 permits downgauging because the linear backbone and limited long-chain branching improve elongation at break and slow crack growth under load. However, its optical properties are generally inferior to LDPE at high gloss or high transparency, and its melt strength is lower. P118 is therefore frequently coextruded with LDPE skins when deeper draw, elevated bubble tension, or improved optical surface finish is required. The processing difference is also significant: P118 can be run at lower melt temperatures than high-density grades and does not require the elevated temperatures associated with acid-copolymer modified LDPE.
On a production-scale single-screw blown film line with screw L/D ratio between 24:1 and 30:1, barrel temperature profiles for SABIC LLDPE P118 are normally ramped from 150 °C in the feed zone to 210 °C at the die. The melt temperature measured at the adapter should remain between 190 °C and 230 °C. Sustained melt temperatures below 170 °C produce solid-bed breakup instability, leading to bubble chatter and thickness variation; temperatures above 240 °C can degrade the antioxidant system and generate gel particles at the die lip. Die gap settings between 1.5 mm and 2.5 mm are preferred for film thicknesses from 25 µm to 80 µm. A blow-up ratio of 2.5:1 is a stable starting point; below 1.8:1 machine-direction orientation raises transverse-direction tear weakness, and above 3.2:1 bubble side-wind sensitivity increases unless an external stabilizing cage is used.
Frost-line height should be maintained at 8 to 12 die diameters. A high frost line reduces quench rate and increases crystalline growth, which may improve dart impact but degrades optical transparency; a low frost line produces rapid quenching, raises internal stresses, and may decrease transverse-direction elongation. On a 90 mm barrier-screw extruder running a 280 mm spiral mandrel die at 180 kg/h, melt pressure can approach 300 bar to 350 bar with a 60/80/100 mesh screen pack. If pressure exceeds 350 bar, screen fouling or melt-temperature maldistribution should be investigated. The use of a grooved feed bushing permits lower feed-zone temperature and higher throughput, but the higher friction raises melt temperature by 5 °C to 10 °C at constant screw speed compared with a smooth-bore feed section.
Extruder screw configuration has a measurable effect on film quality. A screw with a 25:1 L/D ratio, a feed-section depth of 8.0 mm, and a metering-section depth of 2.5 mm provides sufficient shear-work for P118. Aggressive mixing sections with high shear can over-disperse the polymer and reduce melt strength, making bubble stability worse. Barrier screws with a twisted Maddock section generate less temperature build-up than high-shear kneading blocks and are preferred for this material class. On a single-screw extruder with a 60 mm diameter and 25:1 L/D, an output of 80 kg/h to 110 kg/h is attainable at screw speeds between 90 rpm and 120 rpm, depending on die restriction and backpressure.
Published capillary rheometry for this specific P118 configuration is limited; however, for butene LLDPE with density 0.918 g/cm³ and MFR 0.8 g/10 min, apparent viscosity at 190 °C is of the order of 800 Pa·s at 100 s⁻¹ and 200 Pa·s at 1000 s⁻¹. The shear-thinning index between 100 s⁻¹ and 1000 s⁻¹ is therefore approximately 0.4, which is sufficient to prevent excessive motor torque in narrow die gaps but may reduce die-lip cleanability at very high screw speeds.
At the edges of the processing window, thickness variation on a 40 µm film can exceed ±6 % across the lay-flat width when the die-lip temperature varies by more than ±5 °C; this is commonly observed on older hot-air-cooled dies without segmented thermal control. The condition is usually corrected by die-gap adjustment or by reducing air-ring asymmetry, not by increasing melt temperature alone. Pre-drying is not normally required when granular material has been stored in unopened dry conditions below 60 % relative humidity; however, condensation on cold pellets during winter transfer may require dehumidified-air conveying at 45 °C for 1 h to 2 h before charging the hopper.
The following table summarises typical values reported for monolayer blown film. These values are not contractual specifications; lot-to-lot variation may occur from polymerisation variation and conversion conditions. Film properties must be verified on the actual production line using the stated test methods.
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Resin density | ISO 1183-1:2019 / ASTM D1505 | 0.918 | g/cm³ |
| Melt flow rate | ISO 1133-1:2022 / ASTM D1238 | 0.8 | g/10 min |
| Tensile stress at yield, MD | ISO 527-3 / ASTM D882 | 11 | MPa |
| Tensile stress at yield, TD | ISO 527-3 / ASTM D882 | 10 | MPa |
| Tensile strain at break, MD | ISO 527-3 / ASTM D882 | 550 | % |
| Tensile strain at break, TD | ISO 527-3 / ASTM D882 | 650 | % |
| Elmendorf tear, MD | ASTM D1922 / ISO 6383-2 | 150 | gf |
| Elmendorf tear, TD | ASTM D1922 / ISO 6383-2 | 300 | gf |
| Dart drop impact | ASTM D1709 Method A / ISO 7765-1 | 110 | g |
| Haze | ASTM D1003 / ISO 14782 | 12 | % |
| Gloss at 60° | ASTM D2457 / ISO 2813 | 50 | GU |
| Vicat softening temperature | ISO 306 / ASTM D1525 | 100 | °C |
Property values at different film thicknesses do not scale linearly. Thinner films may show lower dart drop impact and higher haze due to cooling-rate effects. The tensile and tear values listed above were generated from film produced with a 2.5:1 blow-up ratio and a die gap of 2.0 mm; changing the blow-up ratio to 3.0:1 typically raises transverse-direction tear at the expense of machine-direction tear, while dart drop impact may remain within ±10 g of the listed value.
Thin-gauge carrier bag production on high-speed converting lines requires stable film-to-film friction characteristics. If the base P118 film is below 0.4 coefficient of friction on metal guides, bag forming may be affected by creasing and poor wicket-hole alignment. Slip masterbatch is commonly added at 500 ppm to 1500 ppm of erucamide or oleamide depending on quarantine time and migration kinetics in the polyethylene matrix. Published data for the specific migration rate of slip agents in P118 is limited; therefore any food-contact structure using an additive masterbatch should be re-evaluated for overall migration under EU Regulation (EU) No 10/2011 or FDA 21 CFR 177.1520.
For agricultural mulch film in thicknesses from 15 µm to 30 µm, P118 can be blended with carbon black masterbatch at 3 % to 5 % by weight. The carbon black increases UV absorption but reduces tear initiation resistance; therefore greenhouse film converters frequently add a second LLDPE grade or use a three-layer structure. On a 55 mm three-extruder line, the P118-based core layer may be run at 200 °C, while LDPE skins are run at 220 °C to maintain clarity; this temperature split reduces die-lip oxidation of the core layer. The final film should be tested for tensile strength retention after accelerated weathering according to ISO 4892-2. Published P118-specific weathering data is limited, so converters should not rely on this resin alone for long-service-life greenhouse covers.
Food-contact suitability of SABIC LLDPE P118 is established by compliance with the general requirements of EU Regulation (EC) No 1935/2004 and the specific plastics regulation EU Regulation (EU) No 10/2011. In the United States, the base olefin polymer may be used as a component of food-contact articles subject to the provisions of FDA 21 CFR 177.1520. The converter must verify that the finished article meets the applicable overall migration limit of 10 mg/dm² or 60 mg/kg under the food-simulant conditions selected in EU Regulation (EU) No 10/2011 Annexes III and V. For fatty food simulants, migration testing is typically conducted with 95 % ethanol or isooctane; for aqueous foods, 3 % acetic acid and 10 % ethanol are used.
| Regulatory Area | Standard/Regulation | Scope / Key Requirement | Practical Verification |
|---|---|---|---|
| European Union food contact | EU Regulation (EC) No 1935/2004 | General safety framework, inertness, no unacceptable change in food composition | Finished-article migration testing |
| EU plastics migration | EU Regulation (EU) No 10/2011 | Positive list of monomers and additives; overall migration limit 10 mg/dm² | Food simulants according to Annexes III and V |
| US food contact | FDA 21 CFR 177.1520 | Olefin polymer sanitary compliance | Residence time, temperature, and extraction tests |
| REACH | EC No 1907/2006 | Registration and authorisation of monomers and additives | Safety data sheet confirmation |
| RoHS | Directive 2011/65/EU | Restrictions on Pb, Hg, Cd, Cr(VI), PBB, and PBDE | XRF screening if product is used in EEE |
| US EPA TSCA | 40 CFR Part 710/720 | Inventory listing of chemical substances | Supplier certification |
Processors should note that P118 is not designed for medical implants. If the final article is used in pharmaceutical packaging, additional pharmacopoeial testing such as Ph. Eur. 3.1.5 or USP <661.1> may be required. The resin should not be combined with post-consumer recyclate in food-contact layers unless the recyclate meets the requirements of the relevant national authority. Storage of sealed resin bags at ambient temperature below 60 % relative humidity minimizes moisture absorption and prevents condensation on cold pellet surfaces. If condensation occurs, dehumidified-air conveying at 45 °C for 1 h to 2 h should be used before charging the hopper. Exposure to prolonged direct sunlight during warehouse storage can increase surface oxidation products but does not typically alter the melt flow rate by more than ±0.05 g/10 min; however, film appearance may be affected and the material should be used within 12 months of the certificate of analysis date.
