| HS Code | 358774 |
| Density | 0.922 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.85 g/10 min |
| Melting Point Dsc | 124 °C |
| Vicat Softening Point | 102 °C |
| Flexural Modulus | 350 MPa |
| Tensile Strength At Yield Md | 12 MPa |
| Tensile Strength At Break Md | 35 MPa |
| Elongation At Break Md | 600 % |
| Dart Drop Impact F50 | 150 g |
| Film Haze | 10 % |
| Gloss 60 | 8 |
| Brittleness Temperature | -70 °C |
As an accredited SABIC LLDPE 120WJ factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE 120WJ is supplied as free-flowing pellets in 25 kg bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL containing SABIC LLDPE 120WJ linear low-density polyethylene, packed in 25kg bags on pallets, net weight approx 20-22 mt. |
| Shipping | SABIC LLDPE 120WJ is a non-hazardous linear low-density polyethylene resin supplied as free-flowing pellets. Ship in clean, dry containers or lined jumbo bags, protected from moisture and direct sunlight. Avoid excessive heat and prolonged storage. Handle with care to prevent bag damage and prevent contamination during transit. |
| Storage | Store SABIC LLDPE 120WJ in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep packaging sealed to prevent moisture contamination and dust accumulation. Avoid excessive stacking or crushing. Maintain moderate temperature and protect pellets from physical damage. Ensure good housekeeping and follow local regulations for polymer storage. |
| Shelf Life | Shelf life is indefinite when stored in a dry, cool area away from direct sunlight, heat, and contaminants. |
On a 65 mm grooved-feed blown film line with an L/D 30:1 barrier screw and a 250 mm spiral mandrel die, SABIC LLDPE 120WJ is blown into heavy-duty shipping sacks at a film thickness of 120 µm to 180 µm. The resin is characterized by a melt flow rate of 2.0 g/10 min at 190°C/2.16 kg per ISO 1133-1 and a density of 0.918 g/cm³ per ISO 1183, placing it in the butene LLDPE class for blown film rather than cast film or extrusion coating. Bubble stability at high output is maintained through the addition of high-pressure LDPE at 20 wt% to 30 wt%; without this, high stalk heights at a 2.5:1 blow-up ratio may induce bubble flutter at the frost line. A die gap of 1.8 mm to 2.5 mm is used because LLDPE with MFR 2.0 exhibits sharkskin melt fracture at apparent shear rates above 500 s⁻¹ in narrow gaps. The terminal sack is tested for dart impact according to ASTM D1709 method A, Elmendorf tear according to ISO 6383-2, and tensile properties according to ISO 527-3. Puncture resistance after filling with granular fertilizer or polymer pellets is measured by ASTM D5748; production lots are released only when the 150 µm film exceeds the minimum total energy absorption set by the filler’s bulk density and the drop height specified in ISO 7965-1 for sack drop testing. Pre-drying is omitted when resin storage humidity remains below 60% RH, but surface condensation above this threshold requires a 60°C hopper dryer for 2 h to prevent bubble pinholes. Because the sack contact medium is industrial rather than food, FDA 21 CFR 177.1520 is not a release requirement, but REACH 1907/2006 and RoHS 2011/65/EU documentation is retained for EU export of the finished sack. On the same line, batch-to-batch melt pressure variation of ±3% is used as an early indicator of resin lot change; if die pressure rises above 320 bar, the LDPE ratio is increased to 25 wt% to protect the screen pack and maintain gauge uniformity across the web.
In vertical form-fill-seal operations running at 60 to 80 bags per minute, a three-layer coextruded film is produced with a 15 µm to 25 µm sealant layer containing 70 wt% to 80 wt% SABIC LLDPE 120WJ and 20 wt% to 30 wt% LDPE. The LDPE addition is not a filler; it shifts the seal-initiation temperature downward and widens the jaw-temperature window between 105°C and 125°C, which is critical when cauliflower or spinach pieces introduce moisture at the seal area. Hot-tack force is evaluated by ASTM F1921, and seal strength by ASTM F88; accepted production values for 60 µm film are established by the packaging line’s drop-test failure boundary rather than by a universal minimum. The outer layer of the structure is typically a high-stiffness HDPE or LDPE skin, while the core contains reprocessed edge trim at up to 30 wt%, provided that the overall migration limit under EU Regulation 10/2011 remains below 10 mg/dm². For direct food contact in the United States, the sealant layer is covered by FDA 21 CFR 177.1520 as an olefin polymer intended for food contact, with end-use temperature limits declared by the food manufacturer. Process conditions on a 300 mm three-layer blown film die are typically 180°C to 200°C melt temperature, 2.2:1 blow-up ratio, and a die gap of 1.6 mm. Fluoroelastomer processing aid is added at 200 ppm to 500 ppm to suppress die-lip build-up during long runs. Jaw cooling water is held at 12°C to 18°C; higher temperatures extend the seal-initiation window but reduce hot-tack force at high cycling speed. The terminal frozen food package must survive -40°C storage without cracking; dart impact retention after conditioning is checked according to ASTM D1709 at -18°C, and any drop below the room-temperature value greater than 30% triggers a blend adjustment toward higher LDPE content.
| Standard or regulation | Scope | Relevant application boundary for 120WJ |
|---|---|---|
| ISO 1133-1:2022 | Melt mass-flow rate | Incoming resin control; 2.0 g/10 min at 190°C/2.16 kg |
| ISO 1183-1 | Density | Verification of 0.918 g/cm³ for film stiffness and yield calculations |
| FDA 21 CFR 177.1520 | Olefin polymer food contact | Frozen food sealant layers and fresh produce bags; end-use temperature declared by converter |
| EU Regulation 10/2011 | Plastic food contact materials | Overall migration limit 10 mg/dm² for 120WJ in direct food contact |
| REACH 1907/2006 | Chemical registration and SVHC communication | EU export of sacks, liners, and geomembranes; SVHC below 0.1 wt% communication threshold |
| RoHS 2011/65/EU | Heavy metals in electrical and electronic equipment | Not normally relevant to PE film, but retained for packaging of EEE where required |
Silage wrap produced from SABIC LLDPE 120WJ is typically run at 25 µm to 40 µm thickness on a three-layer blown film line with a 2.8:1 to 3.2:1 blow-up ratio and a 1.6 mm to 2.0 mm die gap. The core layer is usually 100% 120WJ or a blend with a metallocene LLDPE at 15 wt% to 25 wt%, while the surface layer contains an EVA-rich compound for cling and a hindered amine light stabilizer package at 2 wt% to 4 wt% when UV exposure beyond 12 months is expected. Puncture generation in the field is driven by corn stalk ends and wrapped bale edges, so the film is tested with a blunt probe puncture method according to EN 14477 or ASTM D5748; the 25 µm product is rejected if the penetration energy falls below the line-specific threshold established from the baler wrapper’s stretch ratio. Silage leachate containing lactic acid at pH 3.5 to 4.5 does not dissolve the 120WJ backbone, but prolonged immersion above 30 days can extract low-molecular-weight additives and reduce tear resistance; therefore, the film is specified for one-season use and is not approved for multi-year pit cover retention. Process temperature is held between 185°C and 210°C to avoid gel formation from the UV masterbatch, and the die lip is purged with a cast-grade LLDPE at shift change to control oxidized build-up. The terminal silage film is pulled by the wrapper at 55% to 75% pre-stretch; 120WJ’s butene level accommodates this range without immediate yield point propagation, but at stretch above 80% the film enters the strain-hardening region where local thickness variation creates tear propagation. For EU agricultural film placed on the market, REACH 1907/2006 requires documentation of UV stabilizer registration and Article 33 communication when Substances of Very High Concern are not present above 0.1 wt%.
Temporary landfill cell covers and short-term pond liners are produced from 120WJ-containing geomembranes by flat die extrusion at 2.0 mm to 3.0 mm thickness on a 120 mm single-screw extruder with an L/D 30:1 and a downstream calender stack. The 0.918 g/cm³ density of SABIC LLDPE 120WJ provides greater low-temperature flexibility than HDPE geomembrane compounds, but tensile yield is lower; therefore, 120WJ is melt-compounded with 15 wt% to 25 wt% HDPE and 2 wt% to 3 wt% carbon black masterbatch to raise yield stress and UV screening. The extruded sheet is welded by hot-wedge and extrusion fillet methods, and seam destruct testing follows ASTM D6392 for shear strength and peel separation. Seam acceptance is based on film tear and peel values recorded on a 2 mm coupon; published data for this specific 120WJ/HDPE/carbon black configuration is limited, so site-specific trial welds are required before installation. Low-temperature flexibility is checked by a -20°C brittleness test according to ASTM D746, and the product is rejected if more than 50% of specimens fail at that temperature. Environmental compliance for temporary containment of non-hazardous construction water requires documentation under REACH 1907/2006; where landfill gas contact occurs, methane permeation is not taken from generic polyethylene data but from project-specific permeability testing because 120WJ contains butene branches that reduce crystallinity and increase diffusion paths compared with HDPE. The terminal cover is secured with sandbags or ballast loops welded to the sheet edge; these anchor points are the most frequent failure origin when wind uplift exceeds the anchor design load, so loop spacing below 2 m is specified on exposed slopes.
For refuse sacks and heavy-gauge bin liners, SABIC LLDPE 120WJ is run in the two outer layers of an ABA film at 35/30/35 layer distribution, while the core contains 30 wt% post-industrial recycled LLDPE. Total film thickness ranges from 25 µm for light kitchen liners to 60 µm for industrial refuse sacks. The outer layers provide surface gloss and tear resistance, while the core absorbs recycled feedstock variability such as melt flow shifts and minor gel content. Extrusion is performed on a 90 mm single-screw blown film line at 170°C to 190°C, with a 2.0:1 blow-up ratio and a 1.8 mm die gap. The main process conflict is that recycled LLDPE with lower melt flow raises backpressure and can destabilize the bubble; the 2.0 g/10 min flow of 120WJ is not always sufficient to offset core-layer gels, so screen packs of 80/120/80 mesh are installed before the spiral mandrel die. Finished sacks are tested for dart impact by ASTM D1709 method B and for machine-direction tear by ISO 6383-2; a 25 µm kitchen liner that falls below the line’s minimum tear value after a EN 14477 puncture probe test is downgraded to low-fill service. Odor and extractable requirements are not governed by food contact standards for this application, but the recyclate fraction must be screened for heavy metals and polycyclic aromatic hydrocarbons under REACH 1907/2006 before EU sale. 120WJ’s butene branches reduce stiffness relative to bimodal HDPE liners, which is acceptable for can liners that must follow irregular container contours without splitting at the rim. The terminal product is perforated on-line with cutting dies at 300 mm intervals and stacked by a downstream wicketer; perforation tear initiation is minimized by adjusting the film’s machine-direction orientation via frost line height at 600 mm to 800 mm.
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SABIC LLDPE 120WJ is a pelletized ethylene-butene linear low density polyethylene supplied primarily for blown film conversion. The resin is identified by the nominal density of 0.920 g/cm³ determined under ASTM D1505 and a melt flow rate of 1.0 g/10 min at 190 °C/2.16 kg under ASTM D1238. These two values place the product in the low-to-moderate melt flow segment used for monolayer and coextruded packaging films in which bubble stability, dart impact resistance, and draw-down capability are controlled by molecular weight distribution and comonomer type. Unlike high-pressure low density polyethylene with long-chain branching, SABIC LLDPE 120WJ has a linear backbone with short-chain branches derived from butene comonomer. That structural feature modifies crystallinity, yield strength, tear balance, and melt strength without introducing long-chain branching. The supplier certificate of analysis provides batch-specific values; the preceding density and melt flow rate figures are typical values, not release specification limits.
Melt flow rate of 1.0 g/10 min at 190 °C/2.16 kg under ASTM D1238 functions as an inverse indicator of average molecular weight. For C4-LLDPE blown film extrusion, this value is selected to balance shear viscosity at the die lips against extensional melt strength in the bubble. On a 45 mm grooved-feed single-screw extruder with 30:1 L/D and a 200 mm spiral mandrel die having a 2.0 mm die gap, the resin typically processes with temperature settings from hopper to die in the range of 160–190 °C. If the melt temperature at the die is maintained at 190 ±5 °C, the bubble stability window remains reproducible; sustained operation above 200 °C reduces zero-shear viscosity, increases blocking tendency, and can induce draw resonance in thin gauges. Operation below 180 °C raises melt pressure and can produce sharkskin melt fracture at high throughput. The practical processing window of ±5 °C becomes critical at blow-up ratios above 2.5:1 and frost line heights below 500 mm.
The density of 0.920 g/cm³ determined under ASTM D1505 is a function of comonomer incorporation. In an ethylene-butene copolymer, increasing butene content reduces crystallinity, modulus, and yield strength while raising elongation at break and impact resistance. At 25 µm gauge, a C4-LLDPE with this density and 1.0 g/10 min melt flow rate typically produces blown film with a density-related stiffness, measured as secant modulus under ASTM D882, that is higher than grades at 0.918 g/cm³ but lower than grades at 0.924 g/cm³. Published data for this specific configuration is limited; film fabricators should verify the current SABIC technical datasheet and lot-specific certificate of analysis before setting mechanical performance limits.
Film extrusion of SABIC LLDPE 120WJ is governed by melt pressure, die temperature, draw-down ratio, blow-up ratio, and frost line height. In production-scale trials on a 45 mm grooved-feed extruder with 30:1 L/D, a 200 mm die, and a 2.0 mm die gap, die inlet melt pressure for a C4-LLDPE of 1.0 g/10 min melt flow rate typically lies between 250–350 bar at 80 kg/h output. Motor load on the same extruder commonly reaches 70–85% of nameplate capacity depending on screw design, barrel wear, and melt filtration pack configuration. Bubble stability is maintained when blow-up ratio is kept in the range of 2.0:1–3.0:1 and frost line height is adjusted to 500–800 mm. At high draw-down ratios, lowering frost line height below 400 mm can increase film haze and gauge variation, while excessive frost line height above 900 mm can promote bubble sag and MD tear imbalance.
The melt strength of butene-based LLDPE is lower than that of low density polyethylene produced by high-pressure tubular reactors. As a result, bubble stability is more sensitive to internal bubble air pressure changes and to die lip fouling. Accumulation of oxidized material at the die lips can initiate local draw resonance and produce alternating thick-thin bands in the film. Scrap rates increase when die lip deposits are not removed within 8 h of continuous operation. Processors should avoid melt temperatures above 205 °C to limit oxidative degradation at the die lips. Pre-drying is not normally required for sealed feedstock; resin exposed to relative humidity above 60% in open containers or silos should be dried at 70–80 °C for 2–4 h using desiccant air with a dew point below -20 °C to prevent surface moisture carryover and bubble defects.
Film properties of C4-LLDPE at 25 µm blown film are determined by gauge variation, quench rate, frost line height, and blow-up ratio. Independent literature for C4-LLDPE resin of density 0.920 g/cm³ and melt flow rate 1.0 g/10 min reports dart drop impact in the range of 90–140 g under ASTM D1709 Method A. Tensile strength at break typically falls between 35–45 MPa in machine direction and 28–38 MPa in transverse direction under ASTM D882. Elongation at break is commonly reported at 600–800% machine direction and 700–900% transverse direction under ASTM D882. Elmendorf tear values are typically 5–8 N machine direction and 6–10 N transverse direction under ASTM D1922. These values are not grade-specific specification limits; lot-to-lot variation and fabrication conditions can shift results by 10–20%. The following table consolidates the indicative property ranges for a 25 µm C4-LLDPE film of this density and melt flow rate.
| Property | Test method | Unit | Indicative range at 25 µm gauge |
|---|---|---|---|
| Dart drop impact | ASTM D1709 Method A | g | 90–140 |
| Tensile strength at break, MD | ASTM D882 | MPa | 35–45 |
| Tensile strength at break, TD | ASTM D882 | MPa | 28–38 |
| Elongation at break, MD | ASTM D882 | % | 600–800 |
| Elongation at break, TD | ASTM D882 | % | 700–900 |
| Elmendorf tear, MD | ASTM D1922 | N | 5–8 |
| Elmendorf tear, TD | ASTM D1922 | N | 6–10 |
Because the product is a butene-based linear low density polyethylene, its melt strength and orientation characteristics differ from those of hexene- or octene-based linear low density polyethylene and from metallocene-catalyzed grades. In blown film coextrusion, these differences influence layer distribution, interfacial adhesion, and heat seal performance. At the same density and melt flow rate, a hexene-LLDPE generally produces higher dart impact and puncture resistance than a butene-LLDPE because the longer short-chain branches increase the concentration of tie molecules that bridge crystallites. Under ASTM D1709 Method A, the dart impact of a C6-LLDPE at 0.920 g/cm³ may be 20–40% higher than a C4-LLDPE at the same gauge and processing conditions. The difference is more pronounced at low temperatures, where C6-LLDPE retains better resistance to brittle failure. Conversely, C4-LLDPE such as SABIC LLDPE 120WJ can provide slightly higher stiffness and lower haze in some processing windows because butene comonomer produces more uniform crystal orientation during bubble cooling.
Comparative extrusion data for C4 and C6 copolymers show that substitution of SABIC LLDPE 120WJ into a toughness-critical application requires reevaluation of dart impact, tear balance, and cold-temperature seal performance. At 25 µm gauge, a C6-LLDPE of equivalent density may show dart impact values in the range of 120–190 g under ASTM D1709 Method A, whereas the C4-LLDPE values remain closer to 90–140 g. Tear strength in the machine direction is also typically higher in C6-LLDPE, while transverse direction tear may be similar or slightly lower due to orientation effects. A shift from 120WJ to a C6-LLDPE therefore improves puncture resistance but may reduce machine direction stiffness slightly. When a converter blends 120WJ with 10–30 wt% of a C6-LLDPE, the dart impact and tear balance move upward while processability remains close to the original C4-LLDPE window.
Metallocene-catalyzed linear low density polyethylene differs more distinctly. At equivalent density and melt flow rate, mLLDPE has a narrower molecular weight distribution, higher dart impact, improved hot-tack strength, and lower extractables, but it also exhibits lower melt strength and greater sensitivity to melt fracture. On the same 45 mm grooved-feed extruder with 30:1 L/D and 2.0 mm die gap, replacing 120WJ with an mLLDPE of 1.0 g/10 min melt flow rate can increase die pressure by 10–20% and reduce acceptable draw-down speed unless motor torque and cooling air capacity are adjusted. Processors often blend mLLDPE with C4-LLDPE such as 120WJ to improve bubble stability while retaining much of the impact benefit. Typical blend ratios of 20–40 wt% mLLDPE in 120WJ are used for high-toughness frozen food packaging and puncture-resistant liners, although the optimum ratio depends on sealant-layer thickness and line speed.
Regulatory conformity is formulation-dependent and processing-history dependent. Typical unreinforced polyolefin film grades of this type are assessed for food-contact suitability under FDA 21 CFR 177.1520 for olefin polymers, European Commission Regulation 10/2011 for plastic food contact materials, REACH registration obligations, and RoHS Directive 2011/65/EU for restricted substances. The current grade-specific statement of compliance should be obtained from SABIC before commercial use, because additive package and production site can influence regulatory status. The resin is not specified for medical implantation, aseptic fluid transfer, or prolonged direct contact with oxidizing solvents. Avoid combining with reclaim containing polyisocyanate-based adhesive residues or unreacted amine-cured epoxy contaminants, because such combinations can form gel-like inclusions at die lip temperatures above 200 °C and reduce bubble stability. For operations requiring high hot-tack strength, formulations should be validated under the specific sealing condition and package design, because hot-tack performance is not defined solely by melt flow rate and density.
