| HS Code | 522739 |
| Density | 0.920 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 2.2 g/10 min |
| Melting Point | 122 °C |
| Vicat Softening Temperature | 96 °C |
| Tensile Strength At Yield | 11 MPa |
| Elongation At Break | 550% |
| Flexural Modulus | 220 MPa |
| Shore D Hardness | 50 |
| Brittleness Temperature | -70 °C |
| Environmental Stress Crack Resistance F50 | >1000 hours |
As an accredited SABIC LLDPE 222WT factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SABIC LLDPE 222WT supplied as pellets in 25 kg multi-wall paper bags, palletized and stretch-wrapped for safe transport. |
| Container Loading (20′ FCL) | SABIC LLDPE 222WT loaded as 20' FCL, packed in 25kg bags on shrink-wrapped pallets, about 20 metric tons per container. |
| Shipping | SABIC LLDPE 222WT is supplied as free-flowing pellets and shipped in moisture-protective bags, octabins, or bulk tank containers. Ensure dry, ventilated conditions to prevent condensation. This product is non-hazardous under normal transport, but avoid high heat and secure loads properly to prevent bag damage during transit. |
| Storage | Store SABIC LLDPE 222WT in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and strong oxidizers. Keep in original sealed packaging to prevent moisture and contamination. Silo storage should use dry, clean conditions with proper ventilation. Avoid exposure to UV light and temperatures above 50°C to maintain pellet quality and safe handling. |
| Shelf Life | SABIC LLDPE 222WT has an indefinite shelf life when stored in original, unopened packaging in a cool, dry place. |
SABIC LLDPE 222WT, a butene-comonomer linear low-density polyethylene with a nominal melt mass-flow rate of 2.0 g/10 min at 190°C under 2.16 kg load per ISO 1133-1:2022 and a nominal density of 0.922 g/cm³ per ISO 1183-1, is processed on mono-layer and coextruded blown film lines for refuse sacks, T-shirt carrier bags, and general-purpose liners. The standard extrusion window uses a single-screw extruder with an L/D ratio between 24:1 and 30:1, a barrier screw with a Maddock mixing section, a die gap from 1.8 mm to 2.5 mm, and a blow-up ratio held between 2.0:1 and 3.0:1. Air-cooled production lines with dual-lip air rings and internal bubble cooling generally operate at melt temperatures from 200°C to 230°C, with film thickness for consumer sacks and liners falling between 18 μm and 50 μm. Where bubble flutter or shark-skin appears at higher output, converters introduce high-pressure LDPE at 10 wt% to 20 wt% to raise melt elasticity; each such modification requires revalidation of tensile behavior according to ISO 527-3, Elmendorf tear according to ISO 6383-2, and dart drop impact according to ISO 7765-1 because LDPE addition shifts the machine-direction and transverse-direction tear balance. Slip and antiblock masterbatches are dosed in the range of 1 wt% to 3 wt% where required, but for food-contact end uses the additive concentrate must meet the positive-list restrictions of EU 10/2011 Annex I and the extractable framework of FDA 21 CFR 177.1520. The main operational boundary appears below 15 μm gauge; thin-spot defects and bubble instability are observed unless blow-up ratio is increased or frost line height is deliberately lowered. The matrix below summarizes the core compliance references for this downstream segment.
| Region | Regulatory reference | Scope |
|---|---|---|
| United States | FDA 21 CFR 177.1520 | Olefin polymers for direct and indirect food contact under specified extractable limitations |
| European Union | EU 10/2011 | Plastic materials and articles intended for food contact; overall migration limit 10 mg/dm² |
| European Union | 94/62/EC | Packaging and packaging waste; sum of cadmium, mercury, lead, and hexavalent chromium 100 mg/kg |
| European Union | Regulation (EC) No 1907/2006 | REACH substance restrictions and SVHC article screening |
| China | GB 9685-2016 | Additives permitted in food contact materials and articles |
Blown agricultural film produced from 222WT—silage wrap, greenhouse cover, crop storage liners, and tunnel film—demands controlled orientation balance because the butene short-chain branching lowers melt strength relative to high-pressure LDPE and leaves the bubble more sensitive to molecular orientation at low blow-up ratios. On greenhouse and silage lines, the typical blow-up ratio is held between 2.5:1 and 3.0:1, with die gaps from 2.0 mm to 2.4 mm and frost line heights of 600 mm to 1000 mm depending on cooling configuration. At blow-up ratios below 2.0:1, transverse-direction tear values measured by ISO 6383-2 can fall below the mechanical specification for silage packaging, while excessively high blow-up ratios above 3.0:1 tend to degrade machine-direction stiffness and generate gauge bands if the air ring is not tuned. Production-scale experience on agricultural film lines equipped with internal bubble cooling and segmented die gap adjustment indicates that melt temperature should be maintained inside a narrow window from 200°C to 225°C; operation below 200°C risks unmelts and shark-skin, while operation above 225°C can accelerate surface oxidation and gel streak formation. UV stabilization in greenhouse film is not a default property of 222WT; hindered amine light stabilizer masterbatches must be selected and validated using xenon arc exposure according to ISO 4892-2, with tensile retention and haze measured after defined weathering cycles using ISO 527-3 and ISO 14782. The risk of overstabilization is not negligible because elevated additive loadings can modify surface slip and reduce interlayer adhesion in multi-layer silage structures; therefore migration and coefficient of friction are verified by ISO 8295 before the final film specification is frozen. Published lot-specific weathering data for 222WT in agricultural formulations is limited; converters should generate baseline radiation and mechanical data on the actual film line instead of extrapolating from general-purpose film data.
In multi-layer flexible packaging, 222WT is converted as the blown sealant web or bulk layer in adhesive laminates with BOPP, PET, aluminum foil, or metallized substrates. The film is first produced at 20 μm to 40 μm and subsequently laminated using a two-component solvent-free polyurethane adhesive applied at 1.8 g/m² to 2.5 g/m²; the lamination nip temperature is maintained at 60°C to 70°C to prevent film deformation while allowing green tack to develop. Bond strength is measured by peel testing according to ASTM D1876 at a separation speed of 250 mm/min, and the sealant layer is characterized for seal initiation and hot-tack using ASTM F2029 and ASTM F1921. Because 222WT has an LLDPE melting profile rather than an LDPE profile, seal initiation typically falls between 90°C and 110°C on standard heat-seal test equipment; converters must not assume an LDPE seal curve when setting jaw temperature. Erucamide migration in the sealant layer, when present above 1000 ppm, can reduce bond strength after 7 days of room-temperature storage; adhesively laminated structures should therefore be rechecked after 24 h aging at 50°C according to ASTM D1876. Direct extrusion coating or lamination with 222WT at coating weights below 15 g/m² is not recommended without blending with a higher-melt-index polyethylene because the 2.0 g/10 min melt flow rate limits draw-down stability and neck-in control; published data for this specific extrusion coating configuration is limited, and field qualification requires a pilot trial on the target line.
When 222WT is converted into freezer films for vegetables, seafood, and prepared meals, the critical performance limits are low-temperature dart impact and seal integrity at freezer temperatures down to -20°C or -30°C. Film is typically blown at 30 μm to 60 μm with a blow-up ratio from 2.5:1 to 3.0:1; melt temperature should be limited to 200°C to 220°C because lower melt temperatures help preserve impact toughness, whereas higher temperatures raise the risk of gel streaks and reduce frozen-food film clarity. Low-temperature impact resistance is evaluated by ISO 7765-1 dart drop at -20°C after conditioning the sample for 24 h in a controlled freezer chamber; the acceptance limit must be derived from fill weight, pack geometry, and drop height rather than a single universal value. Seal strength after freezer exposure is measured according to ASTM F88 at both 23°C and -20°C, with heat-seal jaw pressure controlled between 0.4 MPa and 0.6 MPa. The addition of slip and antiblock masterbatch above 3000 ppm can reduce low-temperature seal strength and hot-tack; airtight pack performance must be revalidated using ASTM F1921. Moisture condensation on film surfaces after transfer from cold storage to humid packaging halls must be controlled because surface water promotes blocking and changes frictional behavior measured by ISO 8295. In food-contact freezer applications, the film is subject to FDA 21 CFR 177.1520 and EU 10/2011; antifog masterbatches must be cleared under the relevant market positive list such as GB 9685-2016 or EU 10/2011 Annex I. Published data for low-temperature dart impact of 222WT across all freezer film gauges is limited; when lot-specific data is not available, the converter should establish a statistical baseline on the actual blown film line because additive variation can shift impact values between production batches.
For industrial liners and heavy-duty shipping sacks produced on high-output monofilm lines, 222WT is combined with clean post-industrial recycled LLDPE or LDPE at 10 wt% to 20 wt% to lower compound cost while retaining carry-load resistance. The target film gauge is generally 80 μm to 150 μm; the extruder uses a grooved feed bushing, a 30:1 barrier screw, and a die gap from 2.2 mm to 2.8 mm. Mechanical verification of the finished sack or liner includes tensile evaluation according to ISO 527-3, tear resistance according to ISO 6383-2, and full-pack drop testing according to ISO 2248 to validate side-seal and bottom-gusset integrity under loose-fill loads. The processing constraint is recycled-feed melt flow variability; because 222WT is specified at 2.0 g/10 min per ISO 1133-1:2022, uncontrolled recycled content can shift compound melt flow rate and alter die pressure and bubble geometry. Source lot control should therefore be maintained to the line’s statistical control limits, and melt filtration through a screen pack with 60 mesh to 100 mesh is applied to reduce gels from recycled material. For sacks intended for dangerous goods, UN packaging certification requires qualification under the UN Manual of Tests and Criteria rather than extrapolation from film tensile data alone; published data for UN-certified heavy-duty sack constructions based on 222WT is limited, and final authorization is dependent on line-specific package testing.
When 222WT is coextruded with HDPE in waste bag and refuse sack structures, the die is typically configured in a three-layer A/B/A arrangement with HDPE in the core and 222WT in the skin layers, or with HDPE in one skin and 222WT in the core and opposite skin. Layer distribution is commonly set at 30%/40%/30% or 20%/60%/20% depending on the required stiffness versus sealability balance; 222WT skins contribute heat-sealability and impact toughness, while the HDPE core contributes modulus and downgauging potential. Each layer is supplied by a separate extruder: the HDPE layer is processed at 190°C to 220°C, whereas the 222WT layers are processed at 200°C to 230°C. Interface instability is a known field failure mode when viscosity mismatch is excessive; it appears as layer waviness or periodic haze bands and is controlled by matching melt temperatures and by selecting HDPE grades with melt flow rates between 0.2 g/10 min and 1.0 g/10 min and by avoiding sudden die lip temperature differentials above 5°C. Layer thickness is verified on microtomed cross-sections by optical microscopy or FTIR mapping, while seal strength is measured according to ASTM F88 and tear resistance by ISO 6383-2. Film stiffness is quantified by secant modulus according to ISO 527-3; the HDPE core contribution is not linearly transferable across die geometries, so a three-point gradient trial is required to correlate layer ratio with final stiffness and tear balance. For waste bag structures, the finished film falls under 94/62/EC heavy-metal limits of 100 mg/kg and, where recycled content is included, under SVHC screening per Regulation (EC) No 1907/2006. Published data for 222WT in this specific coextruded waste bag configuration is limited; production trials on three-layer blown film lines with die diameters between 200 mm and 350 mm remain the practical basis for establishing layer-ratio and property correlations.
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SABIC LLDPE 222WT is a butene-comonomer linear low density polyethylene intended for blown film extrusion. Product data sheets list a nominal density of 0.922 g/cm³ when tested under ISO 1183-1 and a melt mass-flow rate of 2.0 g/10 min at 190°C under a 2.16 kg load per ISO 1133-1. The grade is positioned between lower-density butene LLDPE types used for high-elongation stretch film and higher-density grades used for stiffness-critical packaging. It is supplied as a pelletized extrusion resin with antioxidant stabilisation and is typically converted at film thicknesses from 15 µm to 150 µm. The density and melt flow rate are release-lot controlled and should be verified against the supplier certificate of analysis before production qualification.
The molecular architecture of 222WT determines its processability. As a Ziegler-Natta butene copolymer, the resin has a heterogeneous short-chain branch distribution. The high-molecular-mass fraction is less branched, while the low-molecular-mass fraction is more branched. This distribution broadens the melt relaxation spectrum and lowers melt pressure at fixed output when compared with a metallocene LLDPE of equivalent density. The consequence on a production blown film line is a wider bubble stability window and reduced sensitivity to frost line height changes. The same heterogeneity reduces ultimate tensile strength and optical clarity in the finished film relative to metallocene grades, because the lower-molecular-mass fractions contain short chains that scatter light and reduce strain hardening. The flow rate ratio measured between a 21.6 kg load and a 2.16 kg load is typically in the range of 25 to 30 for this catalyst family, which indicates moderate shear thinning and stable melt pumping.
Shopping bags, industrial liners, agricultural tunnel film, and heavy-duty shipping sacks are typical applications for 222WT. High-stalk blown film processes increase machine-direction orientation and improve tensile strength in the haul-off direction, while low-stalk processes favour transverse orientation and higher dart impact. Selection of stalk height should be determined by measuring film properties under ASTM D882 and ASTM D1709 after production trials; the same grade can produce different property balances on the same line.
Within the SABIC LLDPE portfolio, the 2-series designation carries a density target near 0.922 g/cm³. Compared with a 0.918 g/cm³ butene LLDPE, 222WT gives higher secant modulus at a fixed film gauge and lower oxygen and water-vapour permeability. The trade-off occurs in dart impact and low-temperature toughness, where lower-density grades usually perform better because the additional amorphous fraction and tie-molecule population delay crack growth. Processors moving from a 0.918 g/cm³ grade to 222WT should therefore compensate with a 5 µm to 10 µm thickness increase if the package must retain equivalent low-temperature puncture resistance. Conversely, moving from a higher-density LLDPE to 222WT reduces stiffness but improves hot-tack performance and stress-crack resistance in the film.
Comparison with SABIC metallocene LLDPE grades of similar density shows a predictable trade-off. The metallocene catalyst produces a narrow molecular weight distribution and a more uniform comonomer distribution, which improves haze and dart impact at low gauges. However, 222WT retains a processability advantage on older blown film towers with single-lip air rings and short frost lines. On such equipment, the broader molecular weight distribution reduces bubble flutter during startup and resin changeover, and the resin tolerates a wider range of blow-up ratios without losing bubble symmetry. Published data for this specific configuration is limited; the final comparison should be conducted on the target line using film samples measured under ASTM D1709 and ASTM D1003.
On monolayer blown film lines with screw diameters from 40 mm to 90 mm and L/D ratios of 24:1 to 30:1, 222WT processes within a melt temperature band of 190°C to 220°C. A typical barrel profile begins at 170°C in the feed section and rises to 210°C in the metering section. Die temperatures are normally held at 200°C to 220°C. Sustained exposure above 240°C is not recommended because chain scission and oxidation produce gel particles and reduce film impact strength. Processors operating high-output lines commonly use die gaps of 1.8 mm to 2.5 mm and blow-up ratios between 2.0:1 and 3.0:1. At a fixed die gap, increasing the blow-up ratio raises transverse orientation and transverse-direction tensile strength but lowers machine-direction tear strength.
Compounding or dry blending with colour masterbatch or processing aids should be validated for each lot. The base resin is typically stabilised for single-pass extrusion; if regrind levels exceed 20% by weight, the additive package may not fully protect the melt against oxidation and gel formation. Converters adding calcium carbonate masterbatch or slip/antiblock masterbatch should monitor residence time distribution. Pre-drying is not normally required, but condensation on pellet surfaces after cold storage should be removed because surface moisture above 0.1% can generate gel specks or surface roughness in thin-gauge film. Extensional viscosity and melt strength are not specified on standard datasheets but control bubble deformation. A broader molecular weight distribution in 222WT provides higher extensional viscosity at low strain rates than a metallocene LLDPE of the same MFR. This stabilises the bubble neck and allows a shorter frost line without catastrophic draw resonance. On a monolayer line with a 150 mm die and air-ring cooling only, the maximum stable draw ratio is typically higher for 222WT than for metallocene grades of identical density, although published data for this specific configuration is limited.
Film property data for 222WT are meaningful only when sample preparation is controlled. Thickness should be measured under ISO 4593 or ASTM D6988. Tensile properties on film specimens are determined under ISO 527-3 with a crosshead speed of 500 mm/min or under ASTM D882. Dart impact is method-dependent; ASTM D1709 Method A uses a 38 mm dart, while Method B uses a 51 mm dart, and the two values cannot be directly substituted. Haze is measured under ASTM D1003 and is normally reported on a 25 µm or 50 µm specimen after conditioning at 23°C and 50% relative humidity. For Ziegler-Natta butene LLDPE in this density band, haze typically falls between 7% and 12% at 25 µm, but the value is a processing-dependent result, not a fixed polymer constant.
Thermal analysis by differential scanning calorimetry under ISO 11357-3 shows a peak melting temperature for this density class near 122°C; the broad endotherm reflects the heterogeneous comonomer distribution. This thermal behaviour allows heat-seal initiation at lower temperatures than high-density polyethylene but requires lower hot-fill performance than HDPE or polypropylene. Seal performance on form-fill-seal equipment is governed by resin density, comonomer type, and seal bar temperature. 222WT generally seals at temperatures slightly below higher-density LLDPE grades, although the exact seal initiation temperature shifts with film thickness, dwell time, and seal pressure. Heat-seal strength should be evaluated under ASTM F88 and hot-tack under ASTM F1921 rather than inferred from pellet MFR. For lamination and printing, surface treatment should achieve a minimum wetting tension of 38 mN/m within 24 h of treatment. Untreated polyethylene surfaces typically measure below 31 mN/m, and decay is rapid in high-humidity environments.
Water-vapour transmission rate and oxygen transmission rate are not constants printed on datasheets; they scale with film thickness and partial pressure difference. For a 0.922 g/cm³ LLDPE, oxygen transmission at 25 µm is higher than that of a 0.940 g/cm³ HDPE but lower than that of a 0.905 g/cm³ VLDPE. Where barrier targets are critical, the film should be tested under ASTM D3985 for oxygen and ASTM F1249 for water vapour on the actual converter line, because cooling rate and orientation influence permeability by changing free volume and crystalline orientation.
Metallocene LLDPE grades with equivalent melt flow and density are often selected for downgauged film because their narrow molecular weight distribution and uniform comonomer incorporation provide better optics and higher dart impact per unit thickness. The substitution is not universally advantageous. Lines with unstable bubble geometry, limited air-ring cooling, or frequent gauge changes may experience higher rejection rates with metallocene resins because lower melt strength reduces the maximum achievable blow-up ratio and increases sensitivity to ambient air disturbances. 222WT has a wider melt relaxation spectrum, which stabilises the bubble at lower frost line heights and reduces edge flutter in high-density polyethylene-rich coextruded structures. A replacement study should compare film yield per kilogram, tear anisotropy, seal strength, and gel count on the intended line; pellet MFR alone is an insufficient predictor of blown film performance.
In coextruded structures, 222WT is frequently used in core layers where stiffness and bubble stability are more important than surface optics. Skin layers may use a metallocene LLDPE or LDPE to lower haze and raise gloss. When 222WT is placed in a core layer between two LDPE skins, the composite film retains higher dart impact than a monolithic LDPE film of the same total gauge while maintaining stable bubble geometry. The layer ratio should be controlled within ±5% of the designed thickness profile because migration of the higher-melt-strength LDPE skin layers can mask the rheological contribution of the 222WT core during bubble inflation. In freezer packaging, the low-temperature toughness of LLDPE is maintained at temperatures down to -30°C, although the exact ductile-to-brittle transition depends on film thickness and seal geometry. Film produced from 222WT at 50 µm and exposed to repeated flexing should be evaluated under ASTM F392 for flex-crack resistance, because butene LLDPE can develop pinholes faster than octene LLDPE of equivalent density.
The base resin is formulated for general-purpose packaging and may meet the olefin polymer provisions of FDA 21 CFR 177.1520 and the overall migration requirements of European Regulation (EU) No 10/2011. Compliance is condition-specific and depends on the final article composition, food type, contact time, and temperature. Converters must obtain a current supplier conformity statement and conduct end-use migration testing where the food-contact surface is not fully covered by the base resin formulation.
| Standard or regulation | Scope | Typical requirement for LLDPE packaging |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers in food contact | Conforms to density, extractable fraction, and use limitations for resins listed under paragraph (c) |
| EU 10/2011 | Plastic materials and articles intended to come into contact with food | Overall migration limit 10 mg/dm² for food-contact articles |
| REACH Annex XVII | Restrictions on hazardous substances | No intentional SVHC above reportable thresholds; confirm with supplier statement |
| RoHS Directive 2011/65/EU | Electrical and electronic equipment hazardous substances | Base resin without additives normally meets maximum concentration values for lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE |
Processors producing film for pharmaceutical applications should not assume that 222WT is suitable for USP Class VI or medical-grade packaging. The product is not supplied with a dedicated medical change-control protocol, and lot-to-lot additive adjustments can occur within the general-purpose film resin specification. For ultraviolet-exposed agricultural or construction film, the base resin contains no long-term UV stabiliser package; a suitable UV masterbatch must be added and evaluated under ISO 4892-2 or ASTM G154. Due to its density and comonomer type, 222WT is not intended for injection moulding, rotomoulding, pipe extrusion, or wire-and-cable jacketing. The resin is also not recommended for continuous service above 70°C without testing, because oxidative degradation accelerates with temperature and contact with certain metal oxides. When regrind is reused, melt pressure and gel count should be monitored; regrind fractions above 20% require stabiliser supplementation to maintain film quality.
