| HS Code | 993106 |
| Density | 0.927 g/cm³ |
| Melt Flow Rate | 5.0 g/10 min (190°C, 2.16 kg) |
| Melting Point | 122°C |
| Vicat Softening Point | 105°C |
| Tensile Strength At Yield | 15 MPa |
| Tensile Strength At Break | 40 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 350 MPa |
| Dart Drop Impact 25 μm Film | 200 g |
| Haze 25 μm Film | 1.5% |
| Gloss 45 25 μm Film | 90 |
As an accredited ExxonMobil Enable LLDPE 2705MC factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ExxonMobil Enable LLDPE 2705MC is packaged in 25 kg polyethylene-lined paper bags, palletized and shrink-wrapped for transport. |
| Container Loading (20′ FCL) | 20' FCL container loading of ExxonMobil Enable LLDPE 2705MC in 25kg bags, shrink-wrapped on pallets, ready for export. |
| Shipping | ExxonMobil Enable LLDPE 2705MC is supplied as free-flowing pellets in 25 kg bags or bulk hopper trucks. Shipments should be kept dry, clean, and protected from direct sunlight. Handle with standard polymer conveying equipment; avoid dust accumulation and static discharge. No special transport classification required under normal conditions. |
| Storage | Store ExxonMobil Enable LLDPE 2705MC in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed and off bare ground to prevent moisture pickup or contamination. Avoid prolonged UV exposure. Handle with clean equipment, and maintain good housekeeping to minimize dust accumulation. No special hazardous storage is required. |
| Shelf Life | Shelf life is typically 12 months when stored in original, unopened packaging away from heat, moisture, and sunlight. |
In 3-layer coextruded heavy-duty sack lines running 1,200–1,600 kg/h on 90 mm grooved-feed extruders with 30:1 L/D and blown film dies of 400–500 mm diameter, Enable 2705MC is processed at a melt temperature band of 204–227 °C. The grade, an ethylene-hexene metallocene LLDPE with a nominal density of 0.927 g/cm³ per ASTM D1505 and a melt index of 2.7 g/10 min per ASTM D1238 at 190 °C/2.16 kg, is typically introduced at 20–35 wt% in the outer skin sublayers of a 200 µm sack body. In this configuration, the dart impact threshold, measured per ASTM D1709 Method A, is observed to move from 1,200 g toward 1,600 g at 25 °C when compared with a conventional C4-LLDPE skin of equivalent melt index. However, the processing window is not entirely free of constraints: at melt temperatures above 238 °C, blown film bubble stability deteriorates on non-IBC lines without internal bubble cooling, and gauge bands across the bubble circumference have been recorded to shift from ±5% to ±9% on 200 µm films.
The external skin of heavy-duty sacks made with 2705MC shows a reduction in coefficient of friction after corona treatment, but the treatment must be drawn at 38–42 dyn/cm for reliable ink adhesion on water-based flexographic inks. In high-speed filling operations, sacks with 2705MC-rich skins exhibit a lower frequency of impact ruptures at the bottom gusset fold, a failure mode common with low-tensile-seal C4-LLDPE formulations. Seal initiation temperature, tested on a laboratory heat sealer with 40 mm bars at 0.4 MPa, is depressed by approximately 7–10 °C relative to Ziegler-Natta C4-LLDPE, which allows longer land dwell times without scorch on vertical form-fill-seal bagging equipment. The practical limitation is dart impact retention below −18 °C: at that temperature, the improvement narrows, and for frozen-fill sacks, a blend with 10–20% linear low-density polyethylene of lower density may be required to maintain subzero toughness.
In solventless lamination of printed biaxially oriented polypropylene and polyester webs to 30–50 µm LLDPE sealant webs, 2705MC is extrusion-coated or cast as a monolayer sealant at 180–210 °C. Its narrow comonomer distribution and low extractables profile are relevant for food-contact structures where organoleptic neutrality after lamination is specified under EU 10/2011 and FDA 21 CFR 177.1520. The sealant web, when coextruded as a 2-layer A/B structure with a 2705MC seal layer and a low-melt-index core, has demonstrated a heat seal strength plateau of 18–22 N/25 mm per ASTM F88-21 at 130–150 °C sealing temperature, but the plateau is narrower than that of a C6-LLDPE of similar density. Because 2705MC has a higher melt index than laminating grades in the 0.9–1.2 g/10 min range, it tends to flow into the paper or foil substrate pores under high nip pressure, producing variable adhesive anchorage on substrates with surface roughness above 2.5 µm Ra. On laminating lines where the nip pressure exceeds 40 N/cm², edge bleed and local thickness reduction at the laminate edges have been measured at 3–6% of nominal coating weight. This is not a universal defect but rather a process condition that must be managed by reducing die-to-nip distance below 120 mm or by reducing melt temperature to the lower end of the stated range.
For 25 µm agricultural silage wrap produced on three-layer cast stretch lines with 120 µm die gaps and chill roll temperatures set at 18–24 °C, 2705MC is commonly blended with 5–12 wt% polyisobutylene or low-crystallinity C4-LLDPE to modify peel cling. The base resin does not inherently provide the high immediate cling needed for round bale wrapping; its coefficient of friction on a polished steel surface under ASTM D1894 is insufficient without an additive package. In field wraps, the relevant parameter is not the film-to-film static COF but the 24-hour aged cling retention, which is governed by migration of the tackifier. The metallocene narrow molecular-weight distribution of 2705MC allows faster tackifier migration than broad-molecular-weight Ziegler-Natta C4-LLDPE at equivalent film crystallinity, which can produce early cling loss if the wrap is stored above 30 °C. In northern European trials, silage film containing 2705MC as the polar outer layer showed elongation retention after UV exposure measured at 350–400% in the machine direction per ISO 527-3, but only when the formulation contained 0.6–1.0% HALS stabilizer. Without that stabilizer loading, edge cracking appeared after 14 days of outdoor weathering in August conditions.
In September 2024, a central European blown film line producing 45 µm agricultural greenhouse film replaced 60% of a butene LLDPE with 2705MC in the middle layer of a 3-layer symmetric structure. The line used a 280 mm die with dual-lip air ring, BUR of 2.8:1, and frost line height of 650 mm. After the substitution, the film showed lower gel counts per square meter, a haze reduction from 22% to 16% per ASTM D1003, and improved tear propagation in the transverse direction from 9.2 N/mm to 11.6 N/mm per ASTM D1922. However, the same substitution raised the oxygen transmission rate slightly at 23 °C and 50% RH, from 2,300 cm³/(m²·day) to 2,550 cm³/(m²·day) per ASTM D3985. For tomato and cucumber greenhouses where humidity control and ethylene removal are critical, this oxygen rise is generally acceptable, but for short-day ornamental crops requiring CO₂ retention during the night, the increased gas exchange can shift climate control setpoints. Field data for this specific configuration remains limited, and growers are advised to validate OTR against the target crop’s ventilation model before full conversion.
High-clarity collation shrink film, manufactured at 35–50 µm on 5-layer lines with machine-direction orientation ratios between 4.5:1 and 5.5:1, benefits from the low gel level of 2705MC. However, the film’s shrink force at 100 °C in hot water per ASTM D2732 is lower than that of high-pressure LDPE-rich formulations. A film with 70% 2705MC and 30% LDPE typically exhibits 7–9 MPa shrink force in the machine direction at 100 °C, whereas a conventional high-pressure LDPE collation film in the same thickness reaches 11–13 MPa under the same test conditions. This difference means that on horizontal shrink tunnels with short dwell times below 3 seconds, the 2705MC-rich film may not fully conform to irregular bottle contours at neck and handle areas. It is better suited to trayed goods with flat or slightly curved surfaces where shrink force requirements do not exceed 9 MPa at the hot knife sealing zone.
| Structure / Variable | Enable 2705MC at 20 wt% | Enable 2705MC at 35 wt% | Test method |
|---|---|---|---|
| Dart impact, 200 µm film, 25 °C | 1,480 g | 1,590 g | ASTM D1709 Method A |
| Elmendorf tear, MD, 50 µm film | 34 N/mm | 39 N/mm | ASTM D1922 |
| Haze, 50 µm, 3-layer blown film | 16.5% | 15.2% | ASTM D1003 |
| Seal initiation temperature, 0.4 MPa, 0.5 s dwell | 106 °C | 104 °C | ASTM F88-21 |
When 2705MC is fed to a high-speed cast stretch film line producing 20 µm machine film at 900 m/min, the key constraint is melt pressure stability. The resin’s MI of 2.7 g/10 min places it near the upper limit for sufficient melt strength on cast lines without an auxiliary melt pump. At die temperatures above 240 °C, neck-in from the die to the chill roll widens by 4–7 mm per side on a 2,000 mm die, reducing usable width and altering final web edge thickness. Production-scale observations indicate that chill roll temperature must be kept at 20 °C or below to prevent blocking during winder transfer on rolls above 600 mm diameter. The stretch film itself shows high puncture resistance at 15 µm, measured at 1.9–2.3 J per ASTM D5748, but low machine-direction tear resistance relative to C8-LLDPE. For hand-wrap applications where manual tearing is frequently required, 2705MC is not recommended as a neat resin; it is typically limited to 30 wt% in a blend with C8-LLDPE of 2.3 MI to maintain easy hand tear initiation at the roll edge.
Processors using 2705MC in monolayer blown film for industrial liners report that bubble stability is adequate at BUR 2.0–3.0 on conventional high-pressure lines without IBC, provided that melt temperature is kept between 190 °C and 215 °C. At lower temperatures, the crystalline melting peak at approximately 121 °C leaves limited thermal headroom for stretching; at higher temperatures, the bubble becomes prone to sag and oscillation when the frost line exceeds 700 mm. In a 50 µm monolayer liner application, the film demonstrates good resistance to crease cracking when folded and stored at −10 °C for 7 days, but not when stored below −30 °C for extended periods. The limitation is significant for cold-region logistics: at −40 °C, dart impact falls below 450 g, and the liner may fail along fold lines under stack compression loads above 30 kPa.
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Within ExxonMobil’s Enable metallocene polyethylene portfolio, LLDPE 2705MC is characterized as a narrow-composition-distribution linear low-density polyethylene intended primarily for cast film, pre-stretch film, and lamination sealant applications. The resin carries a nominal melt flow rate of 2.7 g/10 min when tested under ISO 1133-1:2022 at 190 °C with a 2.16 kg load and a nominal density of 0.927 g/cm³ determined according to ASTM D1505. End-use requirements normally emphasize dart impact strength, puncture resistance, elastic recovery after stretching, and controlled surface friction; those properties are generated by the metallocene-catalysed chain architecture and the proprietary additive package identified by the MC suffix. The exact additive formulation is not disclosed in this summary, and application-specific performance should be confirmed against the current supplier technical datasheet.
Production acceptance is anchored to melt flow rate, density, and additive content as stated on the supplier certificate of analysis. The melt flow rate is measured according to ISO 1133-1:2022, procedure A, after 5 min preheating; density is measured according to ASTM D1505 on a conditioned specimen. Lot-to-lot control for metallocene polyethylene in this density class is commonly within ±0.2 g/10 min for melt index and ±0.001 g/cm³ for density, but the current certificate of analysis governs each silo. The polymer architecture of 2705MC results from a single-site catalyst system that produces a narrower molecular weight distribution and a more uniform short-chain branching distribution than conventional Ziegler-Natta LLDPE. Gel permeation chromatography of comparable metallocene grades typically yields polydispersity indices below 2.5; however, published data specific to 2705MC is limited, and the value is not a specification. The uniform branching distribution reduces the concentration of highly branched, high-molecular-weight chains that can increase gel formation and optical defects during cast-film extrusion.
| Property | Test method | Nominal value | Unit |
|---|---|---|---|
| Melt flow rate at 190 °C, 2.16 kg | ISO 1133-1:2022 | 2.7 | g/10 min |
| Density | ASTM D1505 | 0.927 | g/cm³ |
| Polymer type | ISO 1043-1 | PE-LLD | — |
| Additive package | supplier technical bulletin | proprietary slip/antiblock | — |
Compared with Ziegler-Natta butene LLDPE of similar density and melt index, 2705MC typically provides higher dart drop impact at equivalent film gauge because the metallocene chain distribution reduces the low-molecular-weight fraction that can initiate puncture failure. Dart impact is measured under ASTM D1709A, Elmendorf tear under ASTM D1922, and puncture resistance under ASTM D5748. The lower shear thinning of the narrow-molecular-weight-distribution melt is the main processing penalty. On a single-screw extruder with an L/D of 30:1 and a general-purpose screw, backpressure can be 5–15% higher than with a conventional butene LLDPE of the same melt index; however, published data for this specific configuration is limited because screw geometry, barrel temperature profile, and throughput dominate the pressure response. Die gap, melt temperature, and polymer processing aid level should therefore be established through production-scale trials rather than by direct transfer from Ziegler-Natta operating conditions.
At film thicknesses from 10 µm to 25 µm, cast-film processing of 2705MC generally uses melt temperatures between 230 °C and 250 °C, measured at the die inlet. Die temperatures are often held 5–10 °C above the melt setpoint to reduce die-lip buildup; the die gap is frequently set at 0.5–1.0 mm depending on line speed and draw ratio. A chill-roll temperature in the range of 15–30 °C is common for cast stretch grades, with air-knife or vacuum-box positioning used to control film quench and gauge uniformity. Because 2705MC has a narrow molecular weight distribution, the shear rate near the die lip can exceed the critical value for sharkskin at lower melt temperatures; increasing the die gap by 0.1–0.2 mm or raising the die temperature typically suppresses surface melt fracture. In high-output lines above 300 m/min, automatic die-bolt or melt-bank gauge control maintains thickness variation below ±2%, but the exact capability depends on the die body and control algorithm.
Cast film lines operating with an air gap of 20–40 mm and a specific output of 0.8–1.5 kg/h per mm die circumference can process 2705MC without the draw resonance observed with conventional high-density polyethylene; however, reducing the air gap below 20 mm may intensify thermal shrinkage. Pre-drying is not required for pellets stored at relative humidity below 60%; if surface condensation occurs from warehouse temperature swings, a desiccant dryer at 60–70 °C for 2–4 h with a dew point of -20 °C or lower is sufficient to remove surface moisture before extrusion. The absence of long-chain branching also limits melt strength; in cast film this is less critical than in blown film because the melt curtain is supported by the chill roll and air-knife.
Blown-film utilization is not the primary design target for 2705MC. When this grade is processed on blown-film lines, the low melt strength associated with the narrow molecular weight distribution restricts the stable bubble envelope; operators often set blow-up ratios between 2.0:1 and 2.5:1 and use internal bubble cooling or lower frost-line heights. High-pressure LDPE remains the preferred material for low-thickness shrink and frozen-food film where bubble stability at high draw is critical. Substitution of 2705MC for LDPE in blown film therefore requires either blending with LDPE at 20–40 wt% or adjusting the die and air-ring configuration. Published data for 2705MC in blown-film configurations is limited because the grade is validated for cast processes.
Systematic comparison should be performed at equal film thickness, gauge variation, and chill-roll conditions; comparisons based on resin density alone can be misleading because film toughness is controlled by short-chain branching distribution as well as density. The following matrix summarizes expected directional differences under cast-film conditions.
| Attribute | Test method | Enable LLDPE 2705MC | ZN butene LLDPE | ZN hexene LLDPE |
|---|---|---|---|---|
| Dart drop impact | ASTM D1709A | higher at equal density | lower | intermediate |
| Elmendorf tear balance | ASTM D1922 | more balanced MD/TD | MD-limited | improved TD |
| Haze and gloss | ASTM D1003 / ASTM D2457 | improved clarity | lower gloss | intermediate |
| Puncture resistance | ASTM D5748 | higher at equal gauge | lower | intermediate |
| Shear thinning and backpressure | ASTM D3835 | reduced shear thinning; higher pressure at same throughput | more shear thinning | moderate |
| Extractables and catalyst residue | supplier extraction method / FDA 21 CFR 177.1520 | lower catalyst-derived extractables | higher | intermediate |
Food-contact compliance is not an intrinsic resin property; it depends on the additive package, layer structure, extraction conditions, and end-use temperature. The supplier’s current regulatory certificate should be consulted for statements under FDA 21 CFR 177.1520(c) and European Commission Regulation (EU) No 10/2011. For polyethylene grades under EU 10/2011, the overall migration limit is 10 mg/dm² for food simulants under prescribed test conditions; compliance is valid only within the supplier’s stated temperature and food-type boundaries. Under REACH, the pellet is generally classified as an article or polymer preparation; under RoHS Directive 2011/65/EU, polyethylene produced without intentionally added heavy metals is not expected to exceed the maximum concentration values for homogeneous materials. These statements do not replace a written supplier declaration for the specific lot and application.
At 12 µm cast film, tensile properties are determined according to ASTM D882 with type IV specimens conditioned at 23 °C and 50% relative humidity. Puncture resistance by ASTM D5748 and dart impact by ASTM D1709A are more sensitive to gauge uniformity than to polymer density; when gauge variation exceeds ±2%, the impact benefit of metallocene architecture can be masked by weak spots. For pre-stretch film, cling force is commonly measured according to ASTM D5458; target cling values vary with end-user line tension, but typical industrial stretch wrappers require sufficient cling to maintain wrap integrity during pallet handling without blocking on unwind. These values should be established on the converted film, not extrapolated from resin pellet properties, because corona treatment, storage temperature, and wound-roll pressure alter surface friction.
At chill-roll temperatures below 15 °C, the quench rate increases film elongation but may reduce adhesion to the metal roll, especially in thin gauges below 15 µm. In such conditions, air-knife pressure and roll surface treatment must be adjusted to maintain web tracking; otherwise, edge wrinkles can induce gauge bands that propagate into stretch-film rolls. Condensation on chilled pellets or silo walls introduces surface moisture that can cause die-lip polymer drool and bubble defects in the cast web. A desiccant dryer set at 60–70 °C with a dew point of -20 °C or lower should be used when pellets have been exposed to rapid temperature swings or when storage relative humidity exceeds 60%. The grade does not require chemical predrying because polyethylene is not hygroscopic; the issue is condensed surface water, not absorbed moisture.
In coextruded lamination sealant layers, 2705MC can be used at thicknesses from 5 µm to 20 µm; heat-seal strength should be measured according to ASTM F88 or ASTM F2029. The metallocene narrow composition distribution generally produces a lower seal-initiation temperature and higher hot-tack compared with an LDPE sealant of equal density; however, published data for 2705MC in multilayer structures is limited. Blending with high-pressure LDPE at 10–20 wt% is often performed in cast lines to improve neck-in and melt curtain stability; the exact blend ratio should be balanced against the associated reduction in puncture resistance and increase in seal-initiation temperature. The low catalyst-residue profile and the controlled additive package make the grade suitable for industrial and hygienic packaging, provided that downstream converting additives do not alter surface wetting or adhesion.
