| HS Code | 265804 |
| Density | 0.921 g/cm³ |
| Melt Flow Rate 190 C 2 16kg | 21 g/10min |
| Melting Point Dsc | 123 °C |
| Vicat Softening Temperature | 88 °C |
| Tensile Strength At Yield | 11 MPa |
| Tensile Strength At Break | 10 MPa |
| Elongation At Break | 200% |
| Flexural Modulus | 420 MPa |
| Shore D Hardness | 58 |
| Brittleness Temperature | -60 °C |
As an accredited Dow DOWLEX LLDPE 2107G factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | DOWLEX LLDPE 2107G is supplied as pellets in 25 kg bags, palletized and stretch-wrapped for safe handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL loading of Dow DOWLEX LLDPE 2107G pellets, using clean, dry packaging, secured properly to prevent shift during transit. |
| Shipping | DOWLEX LLDPE 2107G ships as non-hazardous polyethylene pellets in moisture-resistant bags, bulk sacks, or railcars/trucks. Store dry, avoid direct sunlight and high heat. Keep away from ignition sources and sharp objects. Ensure proper ventilation, secure loads, and protect packaging from damage during transit. |
| Storage | Store DOWLEX LLDPE 2107G in a clean, dry, well-ventilated area, away from direct sunlight, heat, open flames, and ignition sources. Keep in original sealed packaging to avoid moisture, dust, and contamination. Avoid outdoor storage or prolonged UV exposure. Maintain moderate temperature; no special hazardous storage is required if kept dry and segregated from incompatible materials. |
| Shelf Life | DOWLEX LLDPE 2107G has a long shelf life, typically indefinite when stored dry, cool, and protected from UV. |
Flat-die sheet extrusion of DOWLEX 2107G on industrial containment liner lines normally uses a grooved-barrel single-screw extruder with a 30:1 to 33:1 L/D ratio and a barrier screw. Zone temperatures are profiled from 170 °C at the feed throat to 230 °C at the die head. Melt temperature is held between 220 °C and 235 °C. A screen pack arrangement of 60/120/80/120/60 mesh sits ahead of a gear pump. Head pressure is controlled between 220 bar and 300 bar; excursions beyond 350 bar generate shear-induced gels. The melt enters a coat-hanger flat die with 2.0 mm to 2.5 mm die gap and a three-roll polishing stack set at 60 °C, 75 °C, and 85 °C. Sheet thickness from 1.0 mm to 2.5 mm is produced at line speeds between 8 m/min and 18 m/min depending on roll-stack cooling capacity. Finished geomembrane panels are used for canal liners, landfill caps, mining pond liners, and secondary containment pads.
DOWLEX 2107G is a nominal 0.7 g/10 min melt flow rate and 0.917 g/cm³ density octene-copolymer LLDPE. The values are measured by ISO 1133-1:2022 and ASTM D792, respectively. The octene branch distribution in this grade reduces slow crack growth in LLDPE geomembrane sheet, but the material must be evaluated against project-specific leachate matrices. Long-term stress cracking is ranked by notched constant tensile load testing per ASTM D5397. Tensile properties are reported under ASTM D638, tear resistance under ASTM D1004, and puncture resistance under ASTM D4833. Specification conformance is commonly checked against GRI-GM13 for smooth LLDPE geomembranes. The resin is not recommended for direct contact with aromatic hydrocarbons, chlorinated solvents, or strong oxidizers at temperatures above 40 °C. Published data for service life in leachates with pH above 12 are limited.
During horizontal form-fill-seal conversion of heavy-duty industrial sacks, DOWLEX 2107G is processed as the main layer in gusseted tubular film. A 200 mm spiral mandrel die with a 2.0 mm to 2.4 mm die gap operates at a 2.5:1 blow-up ratio. Melt temperature is kept between 205 °C and 215 °C. At 90 wt% DOWLEX 2107G and 10 wt% high-pressure LDPE, bubble stability remains acceptable for continuous winding at 60 m/min. If the LDPE fraction drops below 5 wt%, transverse direction tear drops and bubble flutter begins at the frost line. If LDPE exceeds 20 wt%, dart impact retention falls below the target for polymer pellet sacks. Frost line height is controlled at 5 to 7 die diameters. Higher frost lines increase blocking tendencies in gusseted film; lower frost lines produce poor gauge uniformity. The converted sacks are filled with polymer pellets, fertilizers, pet food, and mineral additives.
Seal performance is measured with a hot-bar sealer at 105 °C to 115 °C, 2 bar jaw pressure, and 0.7 s dwell. Sealed sacks are tested according to ASTM F88/F88M for seal strength and ASTM D1709 for dart impact. On production lines, batch-to-batch melt flow rate variation should be kept below ±0.05 g/10 min. Batches approaching 0.8 g/10 min produce thin seal lips and side-gusset burst failures. Corona treatment at 38 dyn/cm to 42 dyn/cm is applied only when surface printing is required. The resin is not formulated with slip or antiblock; converters must add a masterbatch at 0.5 wt% to 1.5 wt% to control coefficient of friction in automated filling equipment.
In agricultural silage film structures, DOWLEX 2107G is normally placed in the core or backing layer at 50 wt% to 70 wt% of total film. The resin does not provide sufficient surface tack for bale adhesion, so a plastomer-rich skin layer is coextruded. The converter also adds 1.5 wt% to 3.0 wt% HALS masterbatch and 2 wt% to 4 wt% titanium dioxide masterbatch for ultraviolet protection. Film gauge is 30 µm to 40 µm for round bale wrap and 40 µm to 60 µm for silage bags. The blown-film extruder usually has a 70 mm grooved barrel, 28:1 L/D, and a 250 mm die. Blow-up ratio is 2.8:1 to 3.2:1; die gap is 1.8 mm to 2.2 mm. Melt temperature is held at 215 °C to 230 °C to avoid UV stabilizer degradation.
Critical acceptance tests include elongation at break after accelerated weathering. Film produced with these formulations is subjected to ISO 4892-2 cycle A1 for 1000 h to 1500 h. Retention of ≥50% of initial elongation is often required, but purchaser specifications vary. Tensile properties are measured by ASTM D882. Puncture and dart impact are measured by ASTM D5748 and ASTM D1709 method B. Published test data for DOWLEX 2107G in high-altitude UV regions beyond 24 months of field service are limited. Converters using winding speeds above 500 m/min must verify that the tack-layer formulation does not develop blocking on the roll after storage at 30 °C for 48 h.
For food-contact multilayer film structures that incorporate DOWLEX 2107G, final-article compliance testing is required. The resin is supplied with a regulatory statement covering 21 CFR 177.1520(c) 3.2a for olefin polymers in contact with non-fatty foods and EU Regulation (EU) No 10/2011 Annex I monomer restrictions. A typical three-layer frozen food film uses 80 wt% DOWLEX 2107G and 20 wt% metallocene plastomer in the sealant layer. This layer represents 20% of a 55 µm total thickness on a 7-layer blown-film line fitted with a 400 mm die and 0.9 mm die gap. Melt temperature is kept at 220 °C. Gravimetric dosing of the plastomer must hold to ±0.5 wt% to prevent seal initiation shifting outside 95 °C to 105 °C. Finished structures are used for frozen vegetable and seafood packaging where seal integrity at -20 °C is critical.
Overall migration testing is performed on the finished film according to EN 1186-1 and EU 10/2011 Annex III. The global migration limit is 10 mg/dm². Hot-fill conditions above 100 °C require migration retesting under actual process time-temperature conditions. Seal strength is measured by ASTM F88/F88M. The converter must retain REACH Article 33 documentation if any candidate list substance is present at more than 0.1 wt% in the final article.
| Standard | Scope | Limit or test condition |
|---|---|---|
| 21 CFR 177.1520(c) 3.2a | Olefin polymer for non-fatty food contact | End-test extraction by food type |
| EU Regulation (EU) No 10/2011 | Plastic materials intended for food contact | Overall migration 10 mg/dm² |
| EN 1186-1 | Migration test method selection | Simulant and time-temperature per intended use |
| ASTM F88/F88M | Seal strength of flexible barrier materials | Hot-bar seal 95 °C to 105 °C |
When pallet stretch-hood film is produced from DOWLEX 2107G, cast-film equipment must balance melt temperature against die pressure. The grade is blended with a very-low-density ethylene-octene plastomer at 60 wt% to 80 wt% to raise elastic recovery. A 75 mm single-screw extruder with 33:1 L/D and a coat-hanger die operates at melt temperatures of 235 °C to 245 °C. Higher melt temperatures increase gel counts; lower melt temperatures increase die pressure and reduce output. Chill roll temperature is fixed at 20 °C. Film thickness of 50 µm to 75 µm is drawn at winder speeds up to 300 m/min. Beta-scan gauge control keeps thickness variation within ±3% to prevent uneven stretch on pallet corners. The film is converted into stretch-hood sleeves for pallet unitization of building materials, beverage trays, and bagged chemicals.
Elastic recovery is measured by a tensile hold-and-return sequence at 50% elongation and 500 mm/min crosshead speed following ASTM D5459. Puncture resistance is measured by ASTM D5748. Films containing 0.7 g/10 min melt flow rate resin may generate die pressure above 280 bar on narrow die lips. Line operators compensate by raising the die gap rather than raising temperature, because the latter degrades elastic recovery. Published data on long-cycle stretch recovery of DOWLEX 2107G under 10 repeated load cycles is limited, so a packaging machine trial is required before commercial supply.
For bulk container and drum liner production, DOWLEX 2107G is processed in monolayer or two-layer blown-film structures with thickness from 100 µm to 300 µm. When 20 wt% to 40 wt% of the HDPE fraction in a conventional liner blend is replaced by DOWLEX 2107G, slow puncture resistance improves during filling and discharge. The extruder is a 60 mm to 90 mm single-screw machine with 24:1 to 30:1 L/D. Die gap is 2.2 mm to 3.0 mm; blow-up ratio is 2.0:1 to 2.5:1. Lower blow-up ratios are preferred because they raise machine-direction tear resistance, which is necessary for liner insertion into full containers. End products include liners for ore concentrates, mineral pastes, chemical powders, and bulk liquid pastes inside rigid drums.
Testing includes Elmendorf tear strength under ASTM D1922 and slow puncture resistance under ASTM F1306. Films for ore concentrates and mineral pastes are tested for surface abrasion resistance on a rotating drum fixture; the acceptance threshold is set by the end user. The resin does not contain antistatic additive, so applications requiring surface resistivity below 1012 ohm/sq per EN 1149-2 need an antistatic masterbatch evaluated for organoleptic and migration effects. Contact with ketones, esters, or solvent-based adhesives above 40 °C can plasticize the film and reduce burst resistance.
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Dow DOWLEX LLDPE 2107G is a linear low-density polyethylene resin produced by solution polymerization. The product is an ethylene-1-octene copolymer, a structural feature that distinguishes it from butene- and hexene-copolymer LLDPE grades with respect to short-chain branch length, tie-molecule formation, and film failure behavior. Nominal melt flow rate is 2.3 g/10 min measured according to ASTM D1238 at 190°C under a 2.16 kg load. Nominal density is 0.917 g/cm³ measured according to ASTM D792. These values define the primary processing envelope: medium molecular weight, low crystallinity, and a shear-viscosity profile suitable for blown film, cast film, and extrusion coating. The resin is supplied as pellets without a reactor-added slip or antiblock package; converters introduce those masterbatches to control surface friction, blocking, and film handling. Typical end-use areas include collation shrink film, heavy-duty sacks, industrial liners, and hygiene backsheet structures.
The short-chain branch length introduced by the comonomer controls lamellar thickness and tie-molecule density. Butene-derived branches are ethyl groups; hexene-derived branches are butyl groups; octene-derived branches are hexyl groups. Longer branches are sterically less accommodated inside a growing polyethylene lamella, so octene-copolymer LLDPE tends to form thinner lamellae and a more interconnected amorphous phase at equivalent density. This architecture transfers to film properties measured by ASTM D1922 for Elmendorf tear and ASTM D1709 for dart impact. In thin film, the difference is most visible below 50 μm thickness, where brittle failure is governed by stress concentration around crystalline boundaries. The effect of branch type is not a direct prediction of a single lot; blown film parameters including die gap, blow-up ratio, frost line height, and cooling air velocity change orientation and residual stress. Published data for this specific resin under a single standardized film fabrication protocol is limited; side-by-side converter trials on a fixed line remain the most reproducible basis for comparison.
At the nominal density of 0.917 g/cm³, the crystallinity estimated from two-phase density partitioning using ρa = 0.853 g/cm³ and ρc = 1.000 g/cm³ is approximately 44%. This crystallinity is not fixed during processing; rapid quenching in cast film suppresses spherulitic development, while blown film with a high frost line allows more crystalline orientation and direction-dependent property development. The resin therefore displays a film-property envelope dependent on cooling rate and line configuration, not only on polymerization data.
On single-screw blown-film extruders with a barrier screw and length-to-diameter ratio from 24:1 to 30:1, barrel temperatures for DOWLEX 2107G are typically set from 180°C in the feed section to 210°C in the metering section, with a die zone near 220°C. Melt temperature should remain below 250°C; prolonged residence at higher temperatures consumes the hindered phenolic stabilizer package and can increase gel formation. Because LLDPE has lower shear thinning than high-pressure LDPE, screw speed increases can raise melt temperature above the barrel set point by 10°C to 20°C depending on screw design and backpressure. Extruder drive sizing for an LDPE-to-LLDPE conversion may require a torque reserve of 15% to 20%. The resin is not hygroscopic; drying is not required unless pellets are stored under high relative humidity or outdoor condensation. Surface moisture from relative humidity above 60% can produce cast film splay. In that situation, a hopper dryer at 60°C for 2 h removes surface moisture without driving off internal moisture. Temperatures above 80°C in the hopper can soften pellet surfaces and cause feed throat bridging.
Tensile properties of DOWLEX 2107G films are measured according to ASTM D882, tear resistance according to ASTM D1922, dart drop impact according to ASTM D1709, haze according to ASTM D1003, and gloss according to ASTM D2457. None of these values are resin constants; they depend on film thickness, blow-up ratio, die gap, cooling rate, and additive content. A 25 μm film fabricated at a 2.5:1 blow-up ratio and 2.0 mm die gap may show machine-direction tensile elongation at break in the range of 600% to 800%, while a cast film of the same gauge can show different elongation and tear symmetry. Dart impact requires a specified test method and film thickness; Method A and Method B differ in drop height and can produce different failure energies. A meaningful incoming quality control protocol therefore records the exact film fabrication conditions, not only the test output.
Batch-to-batch variation on a production line is often first detected by a shift in melt flow rate or density. A melt flow rate change of 0.2 g/10 min can alter extruder pressure and film gauge uniformity; a density shift of 0.002 g/cm³ can affect film stiffness and blocking behavior. These thresholds are processing guidelines, not product acceptance limits unless stated in the certificate of analysis. Color, haze, and gel counts should also be monitored on standardized cast sheet because degradation products can appear before a measurable melt flow shift.
High-pressure LDPE contributes bubble stability and melt strength, but its dart impact and tear resistance are lower than a solution-process octene-LLDPE at the same gauge. DOWLEX 2107G can allow the converter to reduce film thickness in a heavy-duty sack while retaining a specified dart impact level measured by ASTM D1709. The extent of downgauging is not a fixed value; it is determined by the product end-use drop test, filling equipment, and sealing strength. Because the melt strength of DOWLEX 2107G is lower than that of high-pressure LDPE, bubble instability can appear on lines designed for LDPE, particularly at blow-up ratios below 2:1. Blending 5 wt% to 20 wt% high-pressure LDPE restores bubble symmetry. The LDPE addition raises haze and may reduce Elmendorf tear per ASTM D1922, but the blend remains tougher than an all-LDPE film at equivalent thickness.
Compared with butene-based LLDPE resins of the same nominal density and melt flow rate, DOWLEX 2107G may offer higher impact and tear efficiency, but this advantage is material- and line-specific. Lower-melt-flow-rate octene grades in the DOWLEX family provide improved melt strength for large-diameter blown film lines; however, they require higher extruder torque and may limit thin-film draw. The selection between DOWLEX 2107G and such grades is therefore based on die diameter, available torque, gauge target, and film toughness specification.
Before industrial use, converters should verify the resin certificate of analysis against the following standards. The table below is not a finished-article compliance declaration, because additives, layer structures, processing residues, and end-use conditions can change the regulatory status of the final film.
| Standard or regulation | Designation | Typical relevance to DOWLEX 2107G |
|---|---|---|
| ASTM D1238 | Melt flow rate | 2.3 g/10 min at 190°C/2.16 kg |
| ASTM D792 | Density | 0.917 g/cm³ |
| ASTM D3418 | DSC melting peak | Reported near 122°C for general-purpose LLDPE; verify per lot |
| ISO 1133-1:2022 | Melt mass-flow rate | Method equivalent to ASTM D1238 |
| 21 CFR 177.1520 | Olefin polymer food-contact status | Subject to specific extraction limits; final article verification required |
| EU Regulation 10/2011 | Plastic food contact materials | Overall migration limit 10 mg/dm²; final article verification required |
| ASTM F88 | Heat-seal strength | Used for sealant layer validation at specified dwell time and pressure |
| ASTM F1921 | Hot-tack strength | Used to compare seal performance during high-speed packaging |
Food-contact compliance under 21 CFR 177.1520 and EU Regulation 10/2011 applies to the polymer as supplied only under specified conditions of use. The final multilayer structure may contain tie resins, inks, and coatings that require separate migration evaluation. For medical packaging, additional cytotoxicity and physicochemical testing according to ISO 10993-5 and USP 661 may be relevant. REACH restrictions and authorizations apply to monomer and additive substances; the polymer itself may be exempt from registration, but the converter should verify the safety data sheet and any candidate list substances.
Cast film production of stretch hood film typically combines DOWLEX 2107G with metallocene-catalyzed LLDPE or a cling resin to adjust ultimate stretch and load retention. Cling additives based on polyisobutylene or ethylene-vinyl acetate copolymers are added at 1 wt% to 3 wt%, while slip and antiblock masterbatches are adjusted to maintain coefficient of friction measured per ASTM D1894. In extrusion coating, die gaps below 1.0 mm and line speeds above 200 m/min may induce draw resonance; blending with high-pressure LDPE or increasing melt temperature within the allowed thermal envelope reduces this instability. Seal performance of a DOWLEX 2107G sealant layer is evaluated by heat-seal strength per ASTM F88 and hot-tack strength per ASTM F1921; typical seal initiation temperatures are reported in supplier datasheets for a defined film thickness and dwell time. Data for configurations outside the stated dwell time, pressure, or thickness should not be extrapolated without line validation because seal initiation is governed by polymer melting rate and interfacial temperature history. For outdoor films, the base resin does not include sufficient UV stabilizer for extended exposure; converter-added hindered amine light stabilizers and ultraviolet absorbers are required for weathering resistance tested by ASTM G154 or ISO 4892-2.
