| HS Code | 843308 |
| Density | 0.918 g/cm³ |
| Melt Flow Rate | 1.0 g/10 min (190°C/2.16 kg) |
| Melting Point | 124 °C |
| Vicat Softening Point | 102 °C |
| Tensile Strength At Yield | 11 MPa |
| Tensile Strength At Break | 32 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 340 MPa |
| Shore D Hardness | 48 |
| Brittleness Temperature | -70 °C |
| Escr F50 | >1000 h |
As an accredited SABIC LLDPE 118W factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE 118W is supplied as free-flowing pellets in 25 kg polyethylene bags, shrink-wrapped on pallets. |
| Container Loading (20′ FCL) | SABIC LLDPE 118W is loaded into a 20' FCL container as 25kg bags on pallets, securely stowed for transport. |
| Shipping | SABIC LLDPE 118W is a linear low-density polyethylene resin supplied as free-flowing pellets. It is non-hazardous for transport, shipped in 25 kg bags, jumbo bags, or bulk containers. Keep dry, avoid excessive heat and moisture during transit, and handle to prevent bag damage and contamination. |
| Storage | Store SABIC LLDPE 118W in its original, sealed packaging in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and strong oxidizers. Avoid creating dust; if dust forms, maintain good ventilation and grounded equipment. No special storage hazards exist, but keep material clean and dry for optimal processing and shelf life. |
| Shelf Life | Shelf life is indefinite when stored properly in original packaging, away from direct sunlight, heat, and moisture. |
Monolayer blown film for high-speed vertical form-fill-seal food packaging is processed from SABIC LLDPE 118W as the primary sealant resin because its density of 0.918 g/cm³ and melt flow rate of 1.0 g/10 min under ISO 1133-1:2022 at 190°C and 2.16 kg position seal initiation low enough for fast jaw cycles while retaining dart impact under frozen storage; the film is typically converted into pillow pouches, bread bags, frozen food bags, and carrier bags after treatment to 38–42 mN/m surface tension. The formulation on a 65 mm grooved-feed extruder with 30:1 L/D and a 250 mm die at 1.8–2.2 mm die gap comprises 70 wt% LLDPE 118W, 30 wt% tubular LDPE film grade with a melt index of 0.30–0.35 g/10 min, 0.5–1.0 wt% silica anti-block masterbatch, and 0.3–0.7 wt% erucamide slip masterbatch; the LDPE fraction raises melt strength and permits a blow-up ratio of 2.5:1–3.0:1 without bubble flapping. Compliance for food contact is anchored to FDA 21 CFR 177.1520(c) for olefin polymers, EU Regulation 10/2011 with overall migration below 10 mg/dm² under EN 1186-1:2002, and REACH SVHC screening. Processing is conducted at 195–215°C melt temperature, with frost line height held between 200 mm and 350 mm; the melt temperature is kept below 230°C to limit oxidative gel formation, and below 190°C extruder melt pressure oscillation increases while bubble stability becomes sensitive to ambient draft. Film thickness is maintained at 30–120 µm with gauge tolerance of ±3%; tensile, dart, and tear performance are verified under ASTM D882-18, ASTM D1709-22 Method A, and ASTM D1922-23, respectively. Terminal products are monolayer VFFS pillow packs, fresh bread bags, frozen vegetable films, and grocery carrier films; the grade is not recommended for retort or autoclave use above 100°C sustained service because heat-seal strength and creep resistance drop as service temperature approaches the crystalline melting range.
On cast film lines producing machine-grade stretch wrap, SABIC LLDPE 118W is blended at 80–90 wt% resin with 10–20 wt% metallocene polyethylene plastomer of density 0.870–0.902 g/cm³ to suppress draw resonance and lower yield stress before stretching; a 1.5–2.5 wt% polyisobutylene cling masterbatch is added when the film must show a cling force between 100 g and 250 g per ASTM D5458-12. Compliance for pallet wrap non-food applications is reviewed under REACH; where the film is intended for food overwrap, FDA 21 CFR 177.1520(c) and EU Regulation 10/2011 apply, and low-migration grades of cling additives are selected. Production equipment is a 90 mm extruder with 32:1 L/D feeding a 2000 mm slot die at 0.5–0.8 mm die gap; melt temperature is held at 230–250°C to reduce melt fracture, and the chill roll is operated at 18–25°C to control crystallinity. Line speeds of 300–600 m/min are used; edge pinning and vacuum box settings are adjusted to hold ±5% gauge variation at 23 µm. Terminal product types include 12–20 µm machine stretch film, hand stretch film, pre-stretched pallet wrap, and bundling film. The operational boundary is tightly set: below 230°C die-lip deposit accumulation increases and requires purging, while above 250°C surface oxidation raises gel counts and reduces cling retention.
When agricultural greenhouse film is extruded from SABIC LLDPE 118W, the formulation is set at 85 wt% resin, 15 wt% metallocene LLDPE, and 2–4 wt% hindered amine light stabilizer masterbatch; black/white mulch film adds 2–4 wt% carbon black masterbatch for opacity and weed suppression. The compliance reference for greenhouse covering and low-tunnel film is EN 13206:2017, for silage film EN 13207:2018, and for biodegradable mulch claims EN 17033:2018; mechanical durability is evaluated by tensile elongation after accelerated weathering under ISO 4892-2:2021 or equivalent QUV protocols, with post-aging elongation targets set by converter specification. The film is blown on a 90 mm extruder with 30:1 L/D and a 300 mm die at 2.0–2.5 mm die gap; blow-up ratio is maintained at 2.8:1 to generate layflat widths up to 16 m, and melt temperature is limited to 190–210°C to protect the HALS package from excessive volatilization. Internal bubble cooling is used to stabilize the wide web, and corona treatment to 42–46 mN/m is applied only when printing or sealing demands polar surface modification. Terminal product types include greenhouse covers, low tunnels, silage covers, and black/white mulch films. The material is not recommended for long-term exposure to methyl bromide or concentrated agrochemical fumigants because the butene-LLDPE does not provide the solvent resistance of some olefin copolymers; soil-contact film must be tested for retained elongation after chemical exposure under the applicable EU or national agricultural film standard.
For heavy-duty shipping sacks and flexible intermediate bulk container liners, SABIC LLDPE 118W is blended at 75 wt% with 25 wt% HDPE blown film grade having a density of 0.946–0.956 g/cm³ and a melt flow rate of 0.3–0.7 g/10 min; the HDPE raises secant modulus and reduces creep under stacking loads, but it narrows the heat-seal window and requires sealing jaw temperatures 10–15°C higher than 100% LLDPE film. Batch-to-batch variation in the HDPE melt flow rate is monitored before dry blending because a shift of 0.2 g/10 min changes die melt pressure by a measurable amount and can produce gauge bands in the final sack film. The relevant compliance standard is ISO 21898:2004 for flexible intermediate bulk container testing, with United Nations dangerous goods packaging provisions applicable where the liner is used for hazardous materials; industrial packaging films are also screened under REACH. The film is extruded on a 120 mm extruder with 30:1 L/D and a 400 mm die with 2.0–2.5 mm die gap; blow-up ratio is kept at 2.2:1 to reduce gusset crease cracking, and film thickness is held at 80–140 µm with a gravimetric hopper control and beta gauge scanner maintaining ±4% cross-direction tolerance. Internal bubble cooling and in-bubble gusseting produce layflat widths of 1200–1600 mm. Terminal products include heavy-duty shipping sacks, box inner liners, FIBC liners, and compression-wrapped bales. Seal integrity is measured under ASTM F88/F88M-23, and creep performance is evaluated by loading tests specified in ISO 21898:2004; published data for 118W-specific FIBC performance under drop testing is limited, so converter-level validation is required for each final sacking structure.
Because lamination sealant webs for stand-up pouches and detergent refills are exposed to corona treatment, adhesive wetting, and downstream heat sealing, SABIC LLDPE 118W is used at 100 wt% when a low seal-initiation temperature and stable coefficient of friction are required; in coextruded structures, the resin is placed in the core at 70 wt% with 30 wt% LDPE skins to improve surface treatment retention and reduce blocking. The food-contact compliance reference is FDA 21 CFR 177.1520(c) and EU Regulation 10/2011, with specific migration of slip additives evaluated under EN 13130-1:2004 and overall migration under EN 1186-1:2002; the film is not retort-class and is limited to hot-fill or ambient-fill packaging below 95°C. The sealant web is produced on a three-layer blown film line with 50 mm, 60 mm, and 50 mm extruders, a 200 mm die, and a 1:2:1 layer distribution at 200–220°C melt temperature; after 24 h aging, the film is laminated to metallized PET or BOPP with solvent-free polyurethane adhesive applied at 2.0–2.5 g/m². Laminate bond strength is tested by ASTM D1876-08, seal strength by ASTM F88/F88M-23, and coefficient of friction by ASTM D1894-14. Terminal products include stand-up pouch sealant webs, detergent refill pouch inner layers, dry food pillow pouches, and medical paper lamination films.
At frozen food packaging conversion, the substitution is run with 70 wt% SABIC LLDPE 118W and 30 wt% LDPE; the resulting film shows a lower seal-initiation temperature and higher dart impact at -20°C but requires recalibration of sealing jaw dwell and pressure because the LLDPE phase melts over a broader range than the LDPE it replaces, increasing the risk of edge burning at high jaw temperatures. The formulation includes 0.5–1.0 wt% silica anti-block masterbatch and 0.3–0.6 wt% erucamide slip masterbatch; if high-throughput lines exceed 300 kg/h, 0.2–0.4 wt% fluoropolymer processing aid may be added to reduce melt fracture. Food-contact compliance is based on FDA 21 CFR 177.1520(c) and EU Regulation 10/2011; low-temperature extraction and migration testing are conducted under EN 1186-1:2002. The film is blown at 190–210°C on a 65 mm extruder and 250 mm die with 2.0 mm die gap and blow-up ratio of 2.5:1; after conversion, VFFS lines run with seal jaw temperatures of 105–120°C, sealing pressures of 0.4–0.6 N/mm², and dwell times of 0.8–1.2 s. Terminal product types include IQF berry pouches, frozen vegetable bags, ice cream packaging, and fish block film. The operational boundary is defined by seal strength testing under ASTM F88/F88M-23 and dart impact testing under ASTM D1709-22 Method A at 50 µm film; at -20°C, the film’s stiffness and tear propagation resistance must be revalidated for each bag geometry.
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SABIC® LLDPE 118W is a butene-copolymer linear low-density polyethylene granulate supplied for blown film extrusion. The grade is characterized by a nominal melt flow rate of 1.0 g/10 min measured at 190 °C under a 2.16 kg load according to ISO 1133-1:2022 or ASTM D1238, and a nominal density of 0.918 g/cm³ determined by ISO 1183-1:2019 or ASTM D1505. The W suffix corresponds to a formulated additive package containing processing stabilizer, slip agent, and antiblock agent; the precise additive concentrations appear on the lot certificate of analysis. The base resin is used in monolayer and coextruded film structures where controlled surface slip, moderate puncture resistance, and stable bubble formation at commercial output rates are required. The butene comonomer produces a broader short-chain branching distribution than high-pressure low-density polyethylene and a lower melt elasticity than hexene-copolymer LLDPE of the same density; this molecular architecture establishes the operating window for die gap, melt temperature, and cooling rate.
Because the density value is the indirect control for short-chain branching, a measured density of 0.917 g/cm³ or 0.919 g/cm³ shifts crystallinity, modulus, and seal initiation temperature relative to the nominal value. Converters using the resin in blown film should verify that melt flow rate and density are within the range stated on the purchase order, and should not substitute a lower-density grade without revalidating film gauge, tear balance, and seal response.
The published specification framework for SABIC LLDPE 118W is centered on nominal melt flow rate and density. The melt flow rate is not a single fixed point; it is a manufacturing control band around 1.0 g/10 min, and the certificate of analysis reports the tested value for each lot. The density specification is similarly a band around 0.918 g/cm³. Because butene comonomer incorporation is inferred from density, a shift of 0.002 g/cm³ is large enough to alter dart drop and seal initiation temperature in thin films. Processors are advised to trend density and melt flow rate against film properties rather than relying on nominal datasheet values.
| Property | Nominal Value | Test Method |
|---|---|---|
| Melt flow rate at 190 °C/2.16 kg | 1.0 g/10 min | ISO 1133-1:2022 / ASTM D1238 |
| Density at 23 °C | 0.918 g/cm³ | ISO 1183-1:2019 / ASTM D1505 |
| Comonomer type | butene | producer grade designation |
| Additive package | antioxidant, slip agent, antiblock agent | lot certificate of analysis |
Published data for this specific configuration is limited beyond these physical-property anchors. Film property values such as dart drop impact, Elmendorf tear strength, and haze are not fixed grade constants; they vary with die gap, blow-up ratio, frost line height, and film gauge. Comparative evaluations should therefore be designed as structured experiments on the converter’s own film tower rather than as single-point datasheet substitution.
Processing of SABIC LLDPE 118W on conventional blown film lines begins with die gap selection. Unlike LDPE, which typically runs with a 0.8–1.2 mm die gap, butene-LLDPE of 1.0 g/10 min and 0.918 g/cm³ usually requires a die gap between 1.5 mm and 2.5 mm to reduce die pressure and prevent melt fracture. A starting die gap of 2.0 mm is a common reference for monolayer structures in the 25–80 µm gauge range. The wider gap reduces shear stress at the die lip but also shifts molecular orientation and can raise haze if the film is quenched too slowly; die gap, blow-up ratio, and frost line height are not independent variables.
Melt temperature at the die is held between 200 °C and 230 °C. Barrel set points from feed zone to metering zone are ramped from 170–190 °C toward the die temperature, with screw cooling used only if discharge temperature exceeds 240 °C. Sustained melt temperatures above 250 °C increase gel formation and reduce film appearance; residence time in the adapter and die should be kept short, and screen packs should be sized for a starting differential pressure of 10–20 MPa. When pressure drop exceeds 25–30 MPa, screen replacement is required to avoid excessive shear heating.
Extruder configuration matters because LLDPE exhibits a steep viscosity curve and requires a screw designed for linear polymers. Grooved-feed extruders with 24:1 to 30:1 L/D, barrier flights, and a Maddock mixing section reduce melt-temperature fluctuation and improve homogenization without overworking the polymer. Specific energy demand for LLDPE film extrusion is commonly 0.12–0.18 kWh/kg depending on output, die diameter, and back pressure; lower energy inputs may indicate insufficient mixing, while higher inputs often reflect excessive shear heating. Bubble stability is managed with a dual-lip air ring and, on higher-output lines, internal bubble cooling. Frost line height for 0.918 g/cm³ butene-LLDPE is typically set at 4–8 die diameters above the air ring; for a 250 mm die, this corresponds to a frost line position of 1000–2000 mm. Low frost lines increase quench rate, raise film haze, and reduce blocking, but can destabilize the bubble at high line speeds. High frost lines improve clarity but reduce bubble stability and increase film gauge variability.
The blow-up ratio is typically kept between 2.0:1 and 3.0:1 for this grade because extreme ratios unbalance machine-direction and transverse-direction tear. At a 2.5:1 blow-up ratio and 2.0 mm die gap, frost-line tension is adjusted to keep neck height constant; bubble breathing or helical movement is corrected by reducing air-ring blast or raising melt temperature within the 200–230 °C window. Converters with older LDPE screws often observe sharkskin melt fracture at output rates above 25–35 kg/h per meter of die circumference because the screw lacks the mixing elements required for LLDPE; in such cases, blending with 20–30 wt% LDPE shifts shear-thinning behavior and improves processing stability.
Rheological characterization of comparable 1.0 g/10 min butene-LLDPE grades at 190 °C shows a melt flow ratio MFR21.6/2.16 in the range of 25–30. This ratio indicates broader molecular weight distribution and stronger shear thinning than LDPE, which is why the resin responds well to shear history in the die but remains more prone to melt fracture at high die lip stress. Dynamic oscillatory measurements at 100 rad/s and 190 °C report complex viscosity in the region of 200–300 Pa·s; exact values for 118W should be taken from the lot certificate. These rheological features explain the requirement for wider die gaps and controlled melt temperature.
Film structures based on SABIC LLDPE 118W are typically used in general-purpose packaging film such as garment bags, laundry bags, carrier bags, refuse sacks, and soft-loop handle bags. Because the W formulation contains slip and antiblock additives, the film develops a controlled surface after additive migration; the coefficient of friction is commonly measured after 24 h and 72 h of storage at 23 °C and 50% relative humidity using ISO 8296 or ASTM D1894. The antiblock package reduces blocking during wound-roll storage, which is relevant for high-speed bag-making lines. In applications requiring heat sealing, seal initiation temperature is evaluated using ASTM F88/F88M-21 with a dwell time of 1.0 s and a sealing pressure of 0.28 MPa; the exact initiation point is gauge-dependent and shifts with density, with lower-density grades sealing earlier because of reduced crystallinity.
Blending with low-density polyethylene at 10–30 wt% is common when the converter needs higher melt strength or lower melt pressure. The addition of LDPE improves bubble stability and can reduce haze in thick films, but it lowers dart drop impact and Elmendorf tear relative to neat LLDPE film. In coextruded structures, 118W can be used in core layers where toughness contribution is needed and in outer layers where slip and antiblock are advantageous. It is not optimized for high-clarity frozen food film, heavy-duty sacks requiring very high dart drop impact, or high-performance stretch wrapping; those applications may require hexene-LLDPE, metallocene LLDPE, or LDPE/LLDPE blends with specific comonomer distributions.
The selection between SABIC LLDPE 118W and a hexene-copolymer LLDPE or metallocene-catalyzed LLDPE is made on the basis of mechanical property balance, extrusion line capability, and cost structure. At equal density and melt index, a butene-copolymer grade generally exhibits lower machine-direction Elmendorf tear and lower dart drop impact than a hexene-copolymer grade because butene branches are shorter and generate fewer tie molecules between crystallites. The difference is most visible in the machine direction because film orientation and quench rate amplify the tie-molecule effect. Consequently, 118W is commonly selected for general-purpose thin-gauge film and for blending with LDPE, while more demanding heavy-duty or high-puncture applications move toward hexene or metallocene grades.
Comparative film testing should use the same gauge, blow-up ratio, and melt temperature. Typical test methods include ASTM D1709A for dart drop impact, ASTM D1922 for Elmendorf tear, ASTM D882 for tensile properties, and ASTM D1003 for haze. Without same-line comparison data, single-point substitution of 118W for a hexene grade may require a gauge increase of 10–20% to match impact resistance; the actual adjustment must be established by designed experiments because published data for this specific configuration is limited.
Within the SABIC 118-series, the W suffix distinguishes the formulated film-grade variant from unformulated or lightly stabilized variants. The base resin backbone is generally shared across the series, but the W variant contains the slip/antiblock package, whereas a non-W variant would be expected to omit or reduce these surface-active additives. Converters requiring a neutral surface for lamination, metallization, or high print adhesion may select an unformulated variant and add masterbatch at the hopper; converters requiring immediate low coefficient of friction select W. The selection affects coefficient-of-friction development time, plate-out tendency, and heat-seal contamination, not the base resin’s melt flow rate or density specification.
Regulatory verification for the grade follows standard polyolefin film protocols. The following checklist identifies the standards that converters should request from the supplier or verify on lot documentation.
| Regulation/Use Category | Standard or Designation | Required Verification |
|---|---|---|
| Melt flow rate and density declaration | ISO 1133-1:2022, ISO 1183-1:2019 | Lot certificate of analysis |
| Food-contact olefin polymer | FDA 21 CFR 177.1520 | Condition-of-use migration testing if food type requires |
| EU food-contact plastics | Regulation (EU) No 10/2011 | Overall migration and specific migration limits |
| REACH SVHC content | Regulation (EC) No 1907/2006 | Supplier statement for articles |
| Restriction of hazardous substances | Directive 2011/65/EU | Converter-specific application review |
Storage of SABIC LLDPE 118W granulate should follow standard polyolefin handling practice. The resin is not UV-stabilized for long-term outdoor exposure; film used in agricultural or outdoor service requires carbon black or a UV stabilizer masterbatch. Bags should be kept closed and stored at temperatures below 40 °C to avoid additive migration and moisture condensation on cold pellets. Regrind addition should not exceed 20 wt% in primary film layers because repeated heat history increases gel formation and shifts slip-agent concentration; converters using high scrap rates should monitor gel count, melt flow rate, and coefficient of friction. Corona treatment for lamination or printing should be performed in-line and adjusted to a wetting tension of at least 38 dyn/cm according to ISO 8296; higher levels up to 42–46 dyn/cm may be required for solvent-based inks in high-speed printing.
The grade is not recommended for extrusion coating of aluminum foil at high line speeds without blending, because the melt strength and neck-in behavior of butene-LLDPE are less favorable than LDPE. Avoid melt blending with unneutralized acid copolymers or ionomers unless viscosity ratios are matched, because interfacial instability and phase segregation can develop. The slip additive in the W grade migrates to the surface over time and reduces coefficient of friction; the migration rate is accelerated at storage temperatures above 30 °C. Because the 0.918 g/cm³ density contains a significant amorphous fraction, erucamide-type slip migration is faster than in higher-density polyethylene. Converters should run coefficient-of-friction tests after 24 h, 48 h, and 72 h to establish minimum packaging line performance before release. The same migration can affect heat-seal strength if measured immediately after extrusion; seal strength should be tested after the film has rested for at least 24 h to allow additive bloom.
