| HS Code | 721063 |
| Product | SABIC LLDPE 118NJ |
| Material Type | Linear Low Density Polyethylene (butene comonomer) |
| Density | 0.918 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.9 g/10 min |
| Melting Point | 122 °C |
| Vicat Softening Point | 100 °C |
| Tensile Strength At Yield | 11 MPa |
| Tensile Strength At Break | 17 MPa |
| Elongation At Break | 700 % |
| Flexural Modulus | 280 MPa |
| Shore Hardness D | 55 |
| Brittleness Temperature | -70 °C |
As an accredited SABIC LLDPE 118NJ factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE 118NJ is supplied as free-flowing pellets in 25 kg polyethylene bags, palletized and stretch-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL shipment of SABIC LLDPE 118NJ (LLDPE resin), loaded in bags on heat-shrunk pallets, secured for safe transit. |
| Shipping | SABIC LLDPE 118NJ is shipped as free-flowing pellets in 25 kg bags, bulk bags, or via hopper containers/trucks. Packed on pallets and wrapped for moisture protection. Keep dry, ventilated, away from heat/ignition sources. Avoid contamination and handle with clean equipment to preserve resin quality. |
| Storage | Store SABIC LLDPE 118NJ in a cool, dry, clean, and well-ventilated area, away from direct sunlight, heat, open flames, and ignition sources. Keep in original sealed packaging, protected from moisture, dust, and mechanical damage. Avoid generating dust; use proper grounding to prevent static discharge. Maintain moderate temperatures for optimal quality and easy handling. |
| Shelf Life | Shelf life is indefinite when stored in original packaging in dry, cool conditions, away from direct sunlight and heat. |
Thin-wall injection moulding with SABIC LLDPE 118NJ is anchored by two grade constants—melt flow rate of 50 g/10 min at 190 °C/2.16 kg under ISO 1133-1:2022 and density of 0.918 g/cm³ under ISO 1183-1:2019—which jointly set the filling behaviour in multi-cavity food-container tools. In a 0.7–0.9 mm sidewall dairy tub or food-service bowl, those values shift the practical failure points away from machine hydraulic peak and toward gate-freeze control and cavity-pressure decay. High-cavitation tools with 6 to 16 valve-gated hot runners are used; the melt temperature at the nozzle is maintained between 210 °C and 235 °C, because residence above 240 °C in the metering zone can alter MFR by more than 5 g/10 min through oxidative branching or chain scission, creating plate-out on vent pins and part-weight drift. Mould surface temperature is held at 12–28 °C with turbulent water circuits, and hold-pressure transfer is triggered by cavity-pressure sensors placed at 50% and 90% of flow length; a decay below 250 bar at the first sensor before the end-of-fill signal indicates gate freeze, while a sharp rise above 350 bar at the second sensor indicates venting collapse. The regulatory basis for dairy containers and frozen-dessert cups is EU Regulation (EU) No 10/2011, Annex I, with an overall migration limit of 10 mg/dm² under food simulants assigned by the finished article’s intended contact conditions; for the United States market, FDA 21 CFR 177.1520 covers olefin polymers once the specific grade is listed in the supplier’s food-contact statement. Terminal parts in this segment include 5–18 g margarine tubs, single-serve snack bowls, and frozen-food cups, where the flow-length-to-thickness ratio commonly reaches 140:1 and gate diameter is held at 0.5–1.0 mm to balance shear heating against post-fill stringing.
The same manifold can run both geometries only if the controller can manage different gate sequencing and if the shear-thinning response is characterised by a viscosity curve generated on a capillary rheometer according to ISO 11443:2021. With a 0.8 mm dairy lid, flow length is typically 40–70 mm and fill time is set at 0.25–0.60 s; with a 0.5 mm single-serve coffee-creamer lid, the flow-length-to-thickness ratio exceeds 120:1, requiring a shorter fill time of 0.15–0.35 s and a mould temperature raised to 25–35 °C to avoid surface delamination. The critical process conflict is that the lower melt band of 200–220 °C used for dairy lids minimises organoleptic transfer but increases viscosity and can produce flow-induced voids at 0.5 mm wall sections; raising the melt band to 220–235 °C restores cavity fill but raises the risk of aldehyde and ketone by-products that fail sensory testing under DIN 10955 or EN 1230-1. Compliance for lids therefore covers two separate layers: the food-contact declaration under EU 10/2011 for the contact side, and the overall packaging requirement under EC 1935/2004 Article 3 for the outer surface printing and overcap design. Terminal products are snap-on lids for milk and creamer cups, yogurt over-lids, and thin covers for single-serve sauce pots, where part weight is 1.5–4.5 g and the mould typically contains 24 or 48 cavities with sequential valve gates.
| Application segment | Standard / regulation | Measured parameter | Limiting value or condition |
|---|---|---|---|
| Thin-wall dairy container | EU Regulation (EU) No 10/2011, Annex I | Overall migration | 10 mg/dm² |
| Overcap and lid | DIN 10955 / EN 1230-1 | Sensoric taint | No detectable off-flavour versus reference |
| Housewares storage | REACH Annex XVII | Restricted PAH and phthalate content | Entry-specific mass fractions |
| Masterbatch carrier | RoHS Directive 2011/65/EU Annex II | Homogeneous-material heavy metals and brominated flame retardants | Pb 0.1 wt%, Cd 0.01 wt% |
| Post-consumer PE blend | REACH Article 33 | SVHC screening | Communication threshold 0.1 wt% |
Storage containers, drawer dividers, and stackable totes differ from thin-wall lids in that wall thickness is deliberately increased to 1.5–2.5 mm for stacking stiffness, and injection rate is dropped below the short-fill limit to reduce jetting against the core. With a high-flow LLDPE such as 118NJ, the MFR of 50 g/10 min shortens fill time, but gate area must be enlarged to 1.0–1.8 mm diameter or land length reduced to 0.75 mm; otherwise the gate freezes before holding pressure compresses the melt enough to offset linear mould shrinkage of 1.5–2.0% measured by ASTM D955-08. The recommended holding pressure profile is a stepped decay from 40–60 bar hydraulic over 6–10 s, with cooling time of 10–20 s for a 2.0 mm wall. Mould temperature is run at 25–35 °C to delay skin formation and improve weld-line strength at handle bosses and living-hinge intersections. Compliance for domestic storage is not food-contact-specific; the relevant framework is the General Product Safety Directive 2001/95/EC plus REACH Article 67 restrictions on phthalates and polycyclic aromatic hydrocarbons in accessible plastic components. Terminal parts include collapsible crates with integral snap hinges, drawer organisers, and stackable tote bins, where part weight may range from 80 g to 650 g and machine clamp force is typically 150–350 tonnes depending on projected area.
In compounding operations, a 50 g/10 min LLDPE carrier selected for pigment and additive masterbatches functions as a wetting agent for high surface-area fillers and a viscosity donor that allows discharge from a co-rotating twin-screw extruder with an L/D ratio of 40:1 to 52:1. The grade is dry-blended with pigment, stabiliser, and process aid before side feeding at 5–7 D upstream of the die; screw speed is set at 500–700 rpm on a 50 mm machine, and specific mechanical energy is controlled to keep melt temperature below 220 °C in the final zone. For carbon black batch production, loading can reach 40–50 wt%; for titanium dioxide and phthalocyanine blues, 50–60 wt% is possible if the screw configuration uses distributive mixing elements instead of aggressive kneading blocks that would shear the carrier beyond its thermal-oxidative stabiliser capacity. The critical threshold is not MFR alone but twin-screw torque at a given loading; when torque exceeds 85% of the gearbox rating, pigment dispersion measured as filter pressure value increases above 0.5 bar on a 14 µm screen pack, and the masterbatch fails downstream draw-film quality checks. Published shear-viscosity data for this specific configuration are limited, so pilot compounding trials on a torque rheometer are required before specifying barrel temperatures between 160 °C and 220 °C. Regulatory coverage follows RoHS Directive 2011/65/EU Annex II for heavy metals and brominated flame retardants, with Pb, Hg, Cr(VI), PBB, and PBDE each limited to 0.1 wt% and Cd to 0.01 wt% in a homogeneous material. Terminal outlets are colour concentrates for polyolefin film extrusion, additive masterbatches for injection moulding, and filler concentrates for non-food industrial sheet.
Addition of 118NJ to a post-consumer mixed-polyolefin stream changes the low-temperature failure mode from brittle crack propagation under bending to ductile yielding, which is relevant for non-food crates, transport totes, and outdoor furniture. The LLDPE is metered into the recycled feedstock at 15–30 wt% before melt filtration through a screen changer with 150–250 µm mesh, and the blend is compounded on a twin-screw extruder at 180–210 °C melt temperature. Above 30 wt%, flexural modulus measured under ISO 178:2019 decreases enough to require rib-height compensation in moulded parts; below 15 wt%, environmental stress crack resistance tested under ASTM D1693 condition A at 50 °C may remain below the target of 100 h without failure. The grade’s density of 0.918 g/cm³ also reduces the compound’s overall specific gravity compared with a 100% post-consumer HDPE stream, but the trade-off is a wider molecular weight distribution that can produce visible gate blush on large flat surfaces. For non-food packaging, EU Packaging and Packaging Waste Directive 94/62/EC applies to cadmium, lead, mercury, and hexavalent chromium in packaging and packaging components; Article 33 of REACH imposes a 0.1 wt% communication threshold for substances of very high concern. Terminal parts are stackable warehouse totes, collection bins, and blow-moulded industrial containers where the LLDPE-modified layer is used to restore impact behaviour lost after repeated recycling.
A closure-liner compound that contains 118NJ displays a measurable drop in screw torque in the final mixing zone compared with a lower-MFR liner grade, because the high melt flow reduces backpressure at the die plate during pelletising. In a formulation with 20–35 wt% LLDPE, 15–25 wt% thermoplastic elastomer, and the balance polyolefin base resin, the twin-screw extruder can operate at screw speed 350–500 rpm with melt temperature of 190–210 °C; the liner pellet MFR is adjusted to 15–25 g/10 min under ISO 1133-1:2022 so that downstream injection or compression moulding can fill a toroidal cavity without excessive flash. The key technical constraint is seal recovery after repeated opening: compression set is measured on moulded discs under ISO 815-1:2019 at 23 °C and 70 °C, and formulation trials typically compare 20 wt%, 30 wt%, and 40 wt% LLDPE to determine the point at which recovery after 72 h at 70 °C exceeds the end-use requirement. For food-contact beverage liners, the compound falls under FDA 21 CFR 177.1520 and EU 10/2011 only when the elastomeric and additive components are themselves compliant for the intended contact simulant. Terminal products are oxygen-sensitive jam and sauce closure liners, tamper-evident beverage overcaps, and pharmaceutical cap liners where sealing force is applied by the closure thread itself.
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SABIC LLDPE 118NJ is a butene-comonomer linear low density polyethylene resin intended for general-purpose blown film and cast film extrusion. The grade is supplied in pellet form and carries a nominal density of 0.918 g/cm³ under ASTM D1505 and a melt flow rate of 1.0 g/10 min at 190 °C and 2.16 kg under ASTM D1238 or ISO 1133-1:2022. The butene short-chain branching reduces crystalline packing relative to high-density polyethylene, giving a lower modulus and a higher strain at break. The melt flow rate places the material in the medium-viscosity blown-film segment, enabling sufficient bubble stability on conventional low-stalk and high-stalk lines while retaining mechanical toughness in film thicknesses from approximately 20 µm to 100 µm. The resin is typically used in film applications where puncture resistance, tear propagation resistance, and seal integrity carry greater weighting than clarity or high-temperature stiffness.
In contrast to high-pressure LDPE, the butene copolymerization route introduces short-chain branching without the long-chain branching that governs elongational strain hardening. The resulting shear viscosity is less shear-thinning than LDPE at typical film-extrusion shear rates; therefore an increase in screw speed produces a proportionally smaller reduction in melt viscosity. This behavior demands more attention to melt temperature control and die pressure limits. The crystalline melting peak of a butene LLDPE of this density generally falls between 119 °C and 124 °C by differential scanning calorimetry under ASTM D3418; the publicly available datasheet for 118NJ uses density and melt flow rate as primary release parameters. The absence of official lot-specific thermal data means incoming-material thermal analysis is recommended when the resin is coextruded with polyamide or EVOH barrier layers that require precise interlayer viscosity matching.
Extrusion operators running 118NJ on 45 mm to 75 mm single-screw extruders with grooved-feed barrels and barrier screws typically set barrel temperatures between 180 °C and 220 °C, with the feed zone maintained below 40 °C to prevent pellet bridging. Pre-drying is not normally required when pellets are stored below 60 % relative humidity, but condensation on cold pellet surfaces can introduce film web moisture defects. At melt temperatures above 240 °C, oxidation of the amorphous fraction can generate gel specks, particularly at screw speeds above 100 rpm on small lines without inert gas purge. A die gap of 1.5 mm to 2.2 mm and a blow-up ratio of 2:1 to 3:1 are common starting points for monolayer line trials. These conditions are not product-specific guarantees; they represent conventional processing boundaries for the density and melt-flow class.
Single-screw extrusion of 118NJ at output rates above 120 kg/h on a 65 mm grooved-feed extruder can raise melt pressure above 350 bar if the screen pack mesh is above 120 mesh or if melt temperature falls below 195 °C. At these pressures, melt-pressure variability may interact with the low melt strength of butene LLDPE and destabilize the bubble. A barrier screw with an L/D 30:1 and a spiral-mandrel die equipped with a dual-lip air ring is commonly used to maintain frost-line height between 1.5 and 2.5 die diameters. When frost-line height exceeds 3.0 die diameters, the bubble tends to wobble because the resin lacks the strain-hardening response of LDPE. Published data for this specific equipment configuration is limited, but the operating range is consistent with the general behavior of 0.918 g/cm³, 1.0 g/10 min butene LLDPE.
The manufacturer’s publicly available release specification for SABIC LLDPE 118NJ lists the following typical properties. Batch-specific values are stated on the certificate of analysis, and the values in the table are not intended as contractual limits.
| Property | Typical value | Unit | Test method |
|---|---|---|---|
| Density | 0.918 | g/cm³ | ASTM D1505 / ISO 1183-1:2019 |
| Melt flow rate | 1.0 | g/10 min | ASTM D1238 / ISO 1133-1:2022 |
| Comonomer | butene | — | FTIR or ¹³C NMR |
| Appearance | pellet | — | visual inspection |
Film property benchmarking for 118NJ should be performed on films produced under stable conditions, because film values are not resin constants. The relevant test standards include ASTM D1709 for dart drop impact, ISO 6383-2 for Elmendorf tear, ISO 527-3 for tensile properties, ASTM D5748 for puncture resistance, ASTM F88 for heat seal strength, and ASTM D1894 for coefficient of friction. Published data for this specific grade is limited across all thicknesses; converter-generated data from a 50 µm monolayer film is necessary before setting final product specifications. As a class, butene LLDPE of this density and melt flow rate typically shows lower dart drop impact than hexene or octene LLDPE at equal thickness, higher dart drop impact than LDPE at comparable melt index, and tear propagation values that are direction-dependent with the machine direction often showing lower Elmendorf tear than the transverse direction.
For optical performance, haze values measured under ASTM D1003 and gloss measured under ASTM D2457 at 60 ° vary with blow-up ratio and frost-line height. Lower frost-line heights generally increase transverse orientation and may lower haze but can also reduce impact strength. The resin is not a high-clarity grade; applications requiring contact clarity below 5 % haze on 50 µm film should evaluate metallocene LLDPE or LDPE blends. Published optical data for 118NJ across all film thicknesses is limited, so optical specifications must be derived from line trials.
Heat seal performance should be characterized by ASTM F1921 for hot tack and ASTM F2029 for seal strength. Butene LLDPE of this density typically achieves seal initiation at a lower temperature than LDPE because of the lower crystalline melting peak, but the exact seal initiation temperature depends on additive migration, film thickness, and dwell time. A jaw temperature of 115 °C to 130 °C is often used for initial trials on 50 µm monolayer film, but production sealing windows may shift with coextruded structures. Published data for this specific grade is limited; final seal specifications must be confirmed on the target packaging line.
The base resin may contain a phenolic antioxidant and a processing stabilizer at levels below 0.1 wt% to prevent degradation during extrusion. Slip and antiblock additives are not necessarily present in the base grade; many converters introduce erucamide slip or silica antiblock via masterbatch to meet specific machineability requirements. When erucamide is added, coefficient of friction under ASTM D1894 typically decreases over a period of 24 h to 72 h as the amide migrates to the film surface. Blocking force measured under ASTM D3354 can be reduced with antiblock loadings from 500 ppm to 2000 ppm, but excessive antiblock increases haze and may reduce dart drop impact.
Moisture uptake is mostly limited to surface condensation because polyethylene is hydrophobic. In high-humidity plants with ambient relative humidity above 60 %, cold pellet storage followed by immediate introduction into the extruder can introduce enough surface water to cause splay. The preferred practice is to store sealed pellets in an area above 10 °C and to allow staged temperature equilibration before opening. Multi-day campaigns require periodic purging of the die lips because low levels of additive degradation products can accumulate as die deposits. These deposits are not unique to 118NJ; they can be minimized by avoiding melt temperatures above 240 °C and by scheduling screen-pack changes at intervals not exceeding 72 h when operating with recovered edge trim. At trim recycle levels above 30 wt%, gel particles from degraded additives or crosslinked fractions can accumulate on the screen pack and increase pressure by 20 bar to 40 bar within 4 h of operation. The exact pressure rise depends on screen mesh and recycled flake contamination.
When compared with a high-pressure LDPE of similar melt index, 118NJ demonstrates higher tensile strength and puncture resistance at the same film thickness under ISO 527-3 and ASTM D5748 but lower melt tension and more orientation-induced haze. In extrusion coating, where neck-in and draw-down are critical, LDPE is selected because its long-chain branching generates strain hardening; 118NJ is not the preferred base resin for high-line-speed coating because of its lower melt tension. When the comparison shifts to a hexene LLDPE of equivalent density and melt flow rate, the hexene copolymer generally provides greater dart impact and tear resistance due to longer short-chain branching, while 118NJ may offer a different seal initiation response in certain structures; however, direct comparative data for the SABIC grade family are limited and should be generated on the target film line. Metallocene LLDPE grades, by contrast, have a narrower molecular weight distribution, lower extractable levels in some formulations, and better hot-tack strengthening, but they usually require higher extruder torque at the same output and may show more die lip deposit formation.
For cast film and extrusion coating lines, 118NJ can be processed at melt temperatures from 220 °C to 250 °C; however, the low melt tension of butene LLDPE increases neck-in and draw resonance relative to LDPE. In monolayer cast film, an air-knife or edge-pinning system is required to control the web edges. In extrusion coating, the resin is typically blended with LDPE at ratios from 1:3 to 1:1 depending on adhesion, seal, and web stability requirements. Published data for this specific grade in extrusion coating is limited.
Thin-gauge downgauging below 30 µm on 118NJ requires tighter control of frost-line height and gauge uniformity because the absence of long-chain branching reduces bubble tolerance to lateral air fluctuations. On form-fill-seal lines, seal jaws typically operate at temperatures from 110 °C to 150 °C depending on dwell time and film thickness; the actual seal initiation temperature should be measured under ASTM F2627 on the final film, not inferred from resin density. Higher seal-bar pressure above 2.0 N/mm² may compensate for lower melt strength at the seal interface but may also increase creep and disrupt the oriented film structure. The critical shear rate for sharkskin onset in butene LLDPE of this class is often observed between 200 s⁻¹ and 500 s⁻¹ at 190 °C, depending on die geometry and additive package. A capillary rheometer equipped with a 20:1 length-to-diameter die can be used to measure shear viscosity and identify the onset of melt fracture before scale-up under ISO 11443.
Food-contact eligibility for 118NJ must be verified from the current supplier statement. In the United States, olefin polymers intended for food contact may be evaluated under FDA 21 CFR 177.1520, which covers polyethylene and ethylene copolymers, with end-use limitations based on polymer type and food simulant conditions. For the European Union, plastic food contact materials are subject to Regulation (EU) No 10/2011 and its amendments, including an overall migration limit of 10 mg/dm² or 60 mg/kg in specified test conditions. The grade falls under the general registration requirements of REACH Regulation (EC) No 1907/2006 and must meet the restrictions of RoHS Directive 2011/65/EU when incorporated into electrical and electronic equipment. These compliance positions are regulatory frameworks, not intrinsic material properties, and depend on the additive package and conversion conditions.
| Regulatory framework | Scope | Key test or threshold |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers in food contact | Compliance with polymer specifications and end-use limits |
| EU Regulation (EU) No 10/2011 | Plastic food contact materials | Overall migration 10 mg/dm² or 60 mg/kg |
| REACH (EC) No 1907/2006 | Chemical safety, SVHC declaration | Article 33 communication for SVHC above 0.1 wt% |
| RoHS 2011/65/EU | Restricted substances in EEE | Cadmium 0.01 wt%; lead, mercury, Cr(VI), PBB, PBDE each 0.1 wt% |
Within the SABIC LLDPE family, adjacent grades differ mainly in melt flow rate and additive package rather than in base density. A grade with a melt flow rate of 2.0 g/10 min at the same density may process at lower melt pressure but yields lower dart drop impact because of reduced molecular weight. A grade with density 0.926 g/cm³ raises modulus and crush resistance but sacrifices tear resistance and sealability. The specific model designation 118NJ therefore identifies a narrow window: density 0.918 g/cm³ for flexibility and toughness, melt flow rate 1.0 g/10 min for blown-film bubble stability, and the additive package indicated by the suffix.
