| HS Code | 317328 |
| Density | 0.918 g/cm³ |
| Melt Flow Index | 2.0 g/10 min (190°C/2.16 kg) |
| Melting Point | 122 °C |
| Vicat Softening Point | 110 °C |
| Tensile Strength At Yield | 9 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | 800% |
| Flexural Modulus | 250 MPa |
| Shore D Hardness | 55 |
| Brittleness Temperature | -75 °C |
As an accredited NOVAPOL LLDPE GF-0218-F factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | NOVAPOL LLDPE GF-0218-F is supplied as free-flowing pellets in 25 kg multiwall paper bags, palletized and stretch-wrapped for shipment. |
| Container Loading (20′ FCL) | 20′ FCL loaded with NOVAPOL LLDPE GF-0218-F resin, securely packed, stable, and ready for safe transport. |
| Shipping | NOVAPOL LLDPE GF-0218-F is a linear low-density polyethylene resin supplied as free-flowing pellets. Ship in clean, dry containers or lined bags to prevent contamination. Avoid moisture, direct heat, and open flames. Store away from strong oxidizers. Transport by rail, truck, or ocean freight in standard dry cargo units. |
| Storage | Store NOVAPOL LLDPE GF-0218-F in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed and protect from moisture. Avoid accumulation of dust and store separately from strong oxidizers. Maintain safe handling practices to prevent static discharge and contamination. |
| Shelf Life | Shelf life is typically 12 months when stored in original, unopened packaging in a cool, dry environment. |
NOVAPOL LLDPE GF-0218-F is characterized by a nominal density of 0.918 g/cm³ under ASTM D1505 and a nominal melt mass-flow rate of 2.0 g/10 min at 190 °C/2.16 kg under ASTM D1238. In heavy-duty sack and FIBC liner campaigns, a three-layer blown film line operating with a 75 mm barrier screw and a 350 mm spiral mandrel die processes the resin at 190–230 °C melt temperature and 1.8–2.2 mm die gap. Production-scale observations show thickness variation along the bubble circumference becomes non-conforming when frost line height deviates by more than ±20 mm; the short-chain branching distribution in the 0.918 g/cm³ density grade gives a narrower plateau between extensional viscosity and melt strength than an LDPE-rich blend, so gauge uniformity is particularly sensitive to cooling air velocity and ambient cross-draft. The formulation for 120–150 µm target gauge is typically 70–80 wt% GF-0218-F, 15–25 wt% LDPE, and 2–5 wt% carbon black or white masterbatch; a fluoroelastomer processing aid is metered at 0.05–0.1 wt% only when screen changer melt pressure exceeds 28 MPa. Compliance comprises ISO 527-3 tensile elongation at break, ASTM D1709 dart impact, ASTM D1922 Elmendorf tear, ISO 7965-2 filled sack drop resistance, and ISO 21898 where FIBC inner liners are supplied. Downstream conversion includes blown film extrusion, gusseting, flexographic surface printing, and fabrication into valve sacks, open-mouth sacks, and inserted FIBC liners; finished products are used for polymer granules, fertilizers, construction chemicals, and mineral fillers. The operational boundary is frost line position: below 6 times die diameter the film develops excessive transverse direction shrinkage, while above 10 times die diameter bubble stability declines and edge curl appears during gusseting.
| Property | Standard | Condition |
|---|---|---|
| Tensile elongation at break | ISO 527-3 | Specimen type 2, crosshead speed 500 mm/min |
| Dart impact resistance | ASTM D1709 | Method A, 50% failure probability |
| Elmendorf tear resistance | ASTM D1922 | Unnotched, MD and TD |
| Coefficient of friction | ISO 8295 | 100 mm/min sled speed, 0.2 N/mm² contact pressure |
For agricultural silage overwrap and greenhouse cover film, NOVAPOL LLDPE GF-0218-F is qualified under EN 13206 covering-film specifications and EN ISO 527-3 tensile protocols, with UV performance assessed by ISO 4892-2 xenon-arc exposure and EN 13206 weathering annexes. In three-layer coextrusion, the preferred structure places a 60–70 wt% GF-0218-F core between skins containing 2.0–3.5 wt% hindered amine light stabilizer masterbatch and 0.5–1.2 wt% slip/antiblock masterbatch; if a gas-barrier skin is required for silage oxygen transmission below 100 cm³/m²·d·bar, a polyamide or metallocene-rich layer is held below 20 wt% of total structure to avoid shifting the seal response of the LLDPE-rich core. Processing uses a 1.5–2.0 mm die gap, blow-up ratio 2.5–3.0, and melt temperature 190–215 °C to yield film of 60–120 µm for bale wrap and 120–200 µm for greenhouse cover segments. Downstream conversion comprises folding, welding, eyeleting for clamp films, and cut-to-length sheeting with reinforced edges. Terminal products include bale wrap, silage pit covers, clamp films, and multi-season greenhouse tunnel films. An operational boundary appears at ambient relative humidity above 60%: granules require drying in a desiccant hopper at 70 °C for 4–6 h when surface moisture produces micro-bubbles that emerge as frost-line speckle.
Frozen food packaging on vertical form-fill-seal lines uses NOVAPOL LLDPE GF-0218-F as the sealant layer in a 60–80 µm three-layer blown film. The governing defect on high-speed lines is not tensile impact but low-temperature seal failure caused by inconsistent seal initiation. At transverse jaw settings of 95–110 °C, a 10 °C shift in seal initiation can elevate leaker rates by an order of magnitude because frozen storage at -25 °C or lower embrittles partially fused interfacial layers. The formulation for IQF printed pillow pouches and gusseted bags typically contains 75–85 wt% GF-0218-F, 10–20 wt% LDPE, and 1.0–2.0 wt% slip/antiblock masterbatch; slip loadings above 2.5 wt% reduce seal strength as migrating amide blooms interfere with interdiffusion. Compliance is established under FDA 21 CFR 177.1520(c), EU Regulation (EU) No 10/2011 with overall migration limit 10 mg/dm², seal strength by ASTM F88/F88M, low-temperature dart impact by ASTM D1709, and flex-crack resistance by ASTM F392. Downstream conversion includes surface printing, lamination to oriented PET or biaxially oriented polypropylene, VFFS/HFFS pouch forming, and frozen storage at -25 °C or lower. The film should not be stored in unheated warehouses below 5 °C before sealing because the coefficient of friction rises above 0.4, causing slip-stick misfeeds on high-speed belts.
In extrusion lamination onto aluminum foil for liquid food cartons and aseptic brick sleeves, NOVAPOL LLDPE GF-0218-F is blended with LDPE at 30–50 wt% LLDPE and 50–70 wt% LDPE. Pure GF-0218-F processed at 285–305 °C on a tandem extrusion coating line with an extruder L/D ratio of 30:1 and a flat die width of 1,200–1,600 mm tends to exhibit excessive neck-in; a fluoroelastomer processing aid may be introduced at 0.03–0.06 wt% when line speed exceeds 250 m/min to suppress sharkskin on the chill roll. The lamination structure is controlled at 15–25 g/m² polymer coating on 6.3–9.0 µm aluminum foil, with adhesion measured by ASTM D1876 T-peel and heat seal integrity by ASTM F88/F88M. Food-contact compliance is assessed under FDA 21 CFR 177.1520(c), EU Regulation (EU) No 10/2011, and migration testing at specified conversion temperatures; converters must document residual solvent below 5 mg/m² in printed structures. Downstream converting includes flexographic printing, creasing, scoring, and heat sealing into aseptic brick packs, gable-top cartons, and foil-containing sachets for dairy, juice, and liquid condiments. The major operational boundary is residual surface moisture above 0.1% on foil before lamination; preheating of the foil web at 90–120 °C is mandatory when line ambient humidity exceeds 55% to prevent steamblowing defects and adhesion loss.
Collation shrink film at 25–30 µm thickness uses NOVAPOL LLDPE GF-0218-F as the high-shrink component in a 70–80 wt% blend with LDPE at 20–30 wt% to balance shrink force and seal strength for bottle and can multipacks. On a high-speed blown film line with a 60 mm extruder and a 250 mm die, melt fracture appears as surface haze and transverse bands when the exit shear rate exceeds the critical shear rate of the copolymer matrix; addition of 0.04–0.08 wt% fluoroelastomer processing aid raises the melt-fracture threshold, but dosing above 0.1 wt% reduces hot tack at the seal jaw. Shrink performance is measured by ASTM D2732 unrestrained linear shrinkage and ISO 14616 shrink force; film tensile properties are recorded under ISO 527-3. Compliance for food-contact multipacks follows FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011. Downstream production uses either double-bubble orientation for balanced MD/TD shrink or high-stalk blown film for preferential transverse direction orientation; in-line slitting and perforation prepare the material for automatic bundlers. Terminal products include bottle collation shrink film, can multipack overwrap, and secondary transit overwrap for beverage trays. The process boundary is die exit shear: above the critical shear threshold, surface roughness carries into the sealed seam and creates leak-channel defects; therefore melt pressure and screw speed are monitored with an in-die pressure transducer and controlled to hold shear stress below 0.14 MPa at the die lip.
Flexible geomembrane liners produced from NOVAPOL LLDPE GF-0218-F are qualified by stress-crack resistance and low-temperature brittleness rather than standard film tear values. A typical formulation for 0.75–1.50 mm blown or flat-die geomembrane sheet contains 96–98 wt% GF-0218-F and 2–4 wt% carbon black masterbatch with 2.0–3.0 wt% carbon black content and antioxidant packages; the nominal melt index of 2.0 g/10 min supports the low backpressure required by large flat-die systems but requires melt temperature control at 200–230 °C to avoid melt sag. Compliance is anchored to GRI-GM17 for LLDPE geomembranes, GRI-GM13 for HDPE reference structures, ASTM D5397 notch constant tensile load test, ASTM D746 brittleness temperature, and ASTM D1505 density. Downstream production involves flat-die cast or spiral blown film extrusion, calendering between textured or smooth rolls, welding by wedge or extrusion fillet equipment, and installation as landfill caps, temporary lagoon liners, and secondary containment. Published film-level data for GF-0218-F at geomembrane thicknesses above 1.0 mm remain limited, so pre-production trials should validate weld peel strength and oxidative induction time against project-specific design criteria.
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Polyethylene resin NOVAPOL LLDPE GF-0218-F is a butene-copolymer linear low-density polyethylene pellet grade supplied by NOVA Chemicals for primary film conversion. Nominal density is 0.918 g/cm³ as measured under ASTM D792, and nominal melt flow rate is 2.0 g/10 min at 190°C and 2.16 kg under ASTM D1238. The grade occupies the medium-flow segment of the NOVAPOL LLDPE film range. It is differentiated from fractional-melt NOVAPOL products by lower pressure drop across extrusion dies and shorter residence time at equivalent throughput. It is differentiated from higher-density LLDPE and MDPE film grades by a lower crystalline fraction arising from short-chain branching, which reduces secant modulus and extends low-temperature ductility. Reported conversion applications include heavy-duty liners, can liners, carrier bags, garment bags, produce bags, and sealant layers in multi-layer laminations where a melt flow rate near 2.0 g/10 min is specified to balance drawdown against melt strength.
Quality release testing for GF-0218-F typically comprises melt flow rate under ASTM D1238 and density under ASTM D792, with additional film tests performed on representative extruded film: dart impact under ASTM D1709, Elmendorf tear under ASTM D1922, tensile properties under ASTM D882, and haze under ASTM D1003. Converter specifications may add gel count, gloss, and coefficient-of-friction measurements on finished film. Published batch-to-batch variance data for this specific grade are limited; incoming testing is required because pellet properties alone do not predict film gauge, bubble stability, or seal performance.
Within the 0.918 g/cm³ density class, melt flow rate is the controlling resin variable. Fractional-melt grades near 1.0 g/10 min demonstrate higher extensional viscosity and greater bubble stability in high-stalk tubular film, but they require more screw torque and generate more viscous heating. GF-0218-F at 2.0 g/10 min is typically selected when the extrusion line has a short L/D screw, when melt temperature is constrained by a coextruded heat-sensitive barrier layer, or when thin-gauge webs below 25 µm require drawdown without excessive neck-in. Direct substitution from a 1.0 g/10 min grade should not be made without adjusting blow-up ratio and frost-line height; otherwise bubble oscillation and transverse thickness variation increase. Compared with 0.921–0.925 g/cm³ film grades, the lower density of GF-0218-F yields a lower secant modulus, which is relevant in puncture-loaded liners where deformation before break matters more than tensile yield.
LDPE and LLDPE differ in shear viscosity and extensional strain hardening. Under shear rates typical of film die lips, 100–1000 s⁻¹, LDPE generally exhibits lower shear viscosity because of long-chain branching, while LLDPE maintains a higher viscosity until higher shear. GF-0218-F at 2.0 g/10 min therefore produces higher die pressure than a comparable-melt-index LDPE in narrow die gaps, but lower pressure than a 1.0 g/10 min LLDPE. Extensional strain hardening is also lower in linear resins; this limits maximum draw in high-stalk blown film and is the primary reason LDPE is added at 20–30 wt%. Cast film does not impose the same extensional demand, allowing higher GF-0218-F content and greater drawdown. Melt fracture on the die lip is controlled by shear stress; die gaps below 1.0 mm may exceed the critical shear stress of the resin and require either higher melt temperature or wider die gap.
Cast-film and blown-film equipment behavior differs for this grade. On a cast line with a 75 mm single-screw extruder, 30:1 L/D, and 0.7 mm slot die, start-up melt temperature is typically 210–230°C; lower temperatures increase die pressure and may induce melt fracture at high haul-off speeds, while higher temperatures increase oxidation and gel formation if residence time exceeds 15 min. In blown film, a spiral mandrel die of 1.5–2.3 mm die gap, blow-up ratio 2.0:1–2.5:1, and frost-line height 8–14 die diameters are common operating ranges. Gauge uniformity measured under ASTM D374 is sensitive to bubble oscillation frequency; disturbances above 1 Hz often create transverse bands that cannot be corrected by die-lip movement. On blown-film lines, the most frequent plant-scale failure mode is transverse gauge banding caused by incompatible air-ring settings, not resin lot variation. Changing from a 1.0 g/10 min grade to GF-0218-F without lowering frost-line height or narrowing die gap often produces a less stable bubble at the same output; the bubble enters an oscillatory mode with period shorter than 1 s, and gauge variation under ASTM D374 increases. The corrective sequence is first to increase air-ring air volume, then reduce blow-up ratio to 2.0:1, and only after these changes raise melt temperature by 5–10°C. Published data for this specific grade on high-output internal bubble cooling lines are limited; the ranges given are derived from general LLDPE behavior at 2.0 g/10 min.
Multi-layer film structures frequently place GF-0218-F in the sealant or core layer. LDPE contributes melt strength, bubble stability, and lower die swell, while LLDPE contributes dart impact and tensile properties. A 80/20 LLDPE/LDPE blend is a common starting point; raising LDPE to 30 wt% widens the processing window but may lower dart impact and increase haze. Seal initiation temperature is not a fixed resin property; it depends on finished-film thickness, seal pressure, dwell time, and the lowest-melting component in the layer. Hot-tack and heat-seal measurements are performed under ASTM F1921 and ASTM F2029 respectively on the finished film, not on pellets. The higher melt flow rate of GF-0218-F relative to fractional-melt LLDPE lowers die-lip stress but may reduce bubble stability when coextruded with high-melt-strength HDPE skins.
Dry blending before hopper entry is sufficient for many monolayer lines; a static mixer or 60/80 mesh screen pack assists homogenization. LDPE at 20–30 wt% introduces long-chain branching and reduces extruder pressure at fixed screw speed. Blends of GF-0218-F with hexene LLDPE generally improve dart impact and Elmendorf tear relative to the butene base, but haze and seal initiation shift; converter requalification is required because die geometry and air-ring cooling dominate observed values. Slip, antiblock, and UV masterbatches are dosed at 2–5 wt%, and coefficient-of-friction targets are verified under ISO 8295 or ASTM D1894. GF-0218-F is supplied with a thermal stabilizer for pellet extrusion; it is not formulated as a long-term outdoor weathering grade, and prolonged UV exposure consumes the antioxidant package without visible resin degradation.
Bubble cooling rate and frost-line height set the crystalline morphology. When frost-line height is reduced below 8 die diameters, quench time shortens and dart impact under ASTM D1709 can fall by more than 15% compared with a frost-line height of 12 die diameters, even if density remains unchanged. Conversely, excessive frost-line height above 14 die diameters destabilizes the bubble and increases transverse gauge variation beyond ±5% under ASTM D374. Elmendorf tear measurements under ASTM D1922 are not isotropic; LLDPE film generally exhibits higher tear in the machine direction or transverse direction depending on bubble geometry and frost-line orientation. Published data for this specific grade across all blow-up-ratio settings are limited; the threshold behavior is common to 2.0 g/10 min butene-copolymer LLDPE in monolayer tubular film.
Layer-to-layer viscosity mismatch is a source of interfacial instability. GF-0218-F at 2.0 g/10 min may have lower or higher viscosity than adjacent LDPE or HDPE depending on shear rate and temperature; unstable interface produces haze and local thickness variation. Coextrusion feedblock and die design with matched streamline velocities reduce this artifact. When GF-0218-F is used in a sub-skin layer, the core melt should be designed so that the viscosity ratio between adjacent layers remains below 2:1 at the die-wall shear rate; above this, interfacial waviness becomes visible. Published specific data for GF-0218-F in five-layer structures are limited.
Melt temperature should not exceed 250°C during prolonged residence; hot spots in screw channels and die lips are initiating sites for oxidative gel formation. Purging after shutdown with a lower-MI LDPE or a commercial purging compound removes crosslinked gels that would otherwise appear as specks in thin film. Polyethylene is not hygroscopic, so pre-drying is generally unnecessary below 60% relative humidity; condensation on outdoor silos or cold pellet surfaces should be removed before conveying. Storage under ambient conditions is governed by the manufacturer’s certificate of analysis; the pellet stabilizer package is intended for extrusion, not for extended outdoor storage. Published data for this specific grade under high-temperature cast-film conversion are limited.
Food-contact verification is grade-specific and converter-dependent. Polyethylene of this density class is generally described by FDA 21 CFR 177.1520(c) for olefin polymers, but allowable food types, use temperature, and article thickness are condition-dependent. European compliance under EU Regulation 10/2011 is evaluated on the finished article; the overall migration limit is 10 mg/dm² for plastic food-contact materials, and specific migration of additives must be confirmed against the formulation. Industrial applications not involving food contact do not require these clearances but may require REACH substance registration and RoHS heavy-metal limits. The absence of intentionally added slip and antiblock should be confirmed with the certificate of analysis before attributing a low coefficient-of-friction performance to finished film.
