| HS Code | 279176 |
| Density Astm D1505 | 0.918 g/cm³ |
| Melt Index 190 C 2 16 Kg | 0.75 g/10 min |
| Melt Flow Ratio I21 I2 | 25 |
| Melting Point Dsc | 122 °C |
| Vicat Softening Point | 95 °C |
| Brittleness Temperature | -75 °C |
| Tensile Strength At Yield | 11 MPa |
| Elongation At Break | 800 % |
| Flexural Modulus 1 Secant | 250 MPa |
| Shore Hardness D | 55 |
| Environmental Stress Crack Resistance F50 | >1000 h |
| Film Dart Drop Impact | 520 g |
As an accredited NOVAPOL LLDPE PF-0218-D factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | NOVAPOL LLDPE PF-0218-D is supplied as pellets in 25 kg moisture-protective bags, palletized and wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: containerized loading of NOVAPOL LLDPE PF-0218-D resin pellets, secured in bags, ensuring safe, efficient transport. |
| Shipping | NOVAPOL LLDPE PF-0218-D is a non-hazardous polyethylene resin supplied as free-flowing pellets. Ship in clean, dry containers or railcars, protected from moisture and contamination. Avoid excessive heat and direct sunlight. No special transport classification required, but secure loads to prevent shifting. Standard dry bulk or bagged freight is suitable. |
| Storage | Store NOVAPOL LLDPE PF-0218-D in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep original containers tightly sealed to prevent moisture pickup and contamination. Avoid generating dust; use appropriate grounding to prevent static discharge. Maintain good housekeeping and safe handling practices to preserve product quality. |
| Shelf Life | Shelf life is indefinite when stored in original sealed containers, kept dry, and protected from heat and direct sunlight. |
Across heavy-duty sack blown-film lines, NOVAPOL PF-0218-D is generally processed on grooved-feed single-screw extruders with screw diameters of 50 mm to 90 mm and length-to-diameter ratios of 25:1 to 30:1. The resin’s nominal density of 0.918 g/cm³ and melt index of 2.0 g/10 min (ASTM D1238, 190 °C/2.16 kg) reduce melt pressure at high screw speed compared with 0.8–1.0 g/10 min film grades, but the lower viscosity narrows the melt fracture window if the die gap is below 1.8 mm. Sacks are typically extruded at 70–120 μm total thickness with blow-up ratios between 2.0:1 and 3.2:1. On three-up converting lines equipped with internal bubble cooling and annular dies of 200–350 mm diameter, frost line heights of 600–900 mm above the die face produce a balance between machine-direction and transverse-direction tear. Elmendorf tear values obtained under ASTM D1922 on 50 μm monolayer film frequently show transverse-direction values 30–50% higher than machine-direction values because of molecular orientation; converters compensate by rotating wind-up direction or using gusseted seams. A documented production failure mode involved reducing blow-up ratio below 2.0:1 to elevate machine-direction tear for filling heavy granules. The subsequent sacks exhibited deep die lines and split along the gusset crease after a 1.5 m drop test, and the failure reproduced across three separate batches. Compliance is application-dependent: non-food industrial sacks are screened under EU 94/62/EC heavy-metal limits and REACH Candidate List obligations; food-contact sack structures must meet FDA 21 CFR 177.1520 and EU 10/2011 overall migration of 10 mg/dm². Surface friction on high-speed filling spouts is managed by adding 0.05–0.15 wt% erucamide slip and 0.1–0.3 wt% silica antiblock masterbatch; without these, PF-0218-D film blocks on rewind after 48 h under tension. Published data for PF-0218-D in internally cooled lines exceeding 350 kg/h per die are limited, and a pilot trial is required before replacing a higher-viscosity LLDPE in monomaterial sack structures.
Carbon black dispersion rather than melt-index drift determines field failure in agricultural silage cover films based on PF-0218-D. The resin is generally coextruded in 25–60 μm thickness, with the LLDPE layer comprising the sealable inner surface and a carbon-black-loaded outer layer for ultraviolet stabilization. Carbon black masterbatch loading of 2–4 wt% in the outer layer is common; ultrafine dispersion is necessary because agglomerates larger than 15–20 μm become pinhole initiation sites under wind load. Finer filtration with 100/120/200 mesh breaker plates and melt-tight screen changers is used instead of coarse 40/60/100 packs. Weathering resistance is evaluated by ISO 4892-2 or ISO 4892-3 accelerated exposure; outdoor field performance is judged by tensile retention after 12 months. Seal strength across the folded edge is measured with ASTM F88; seal initiation for PF-0218-D in the 95–115 °C range on gradient sealers is typical for single-layer sealant webs. Blow-up ratios between 3.0:1 and 4.0:1 are used for silage bags because higher transverse orientation improves puncture tolerance under sharp stalk contact, but above 4.0:1 the bubble becomes sensitive to ambient drafts and requires an enclosed bubble cage. Frost line heights of 8–12 die diameters are held in high-stalk configurations to compensate for the relatively low melt tension of 0.918 g/cm³ LLDPE. Compliance for agricultural wrap depends on national specifications; EN 13206 covers thermoplastic stretch films for silage bales, while EN 13655 covers agricultural polyethylene films. Terminal products include clamp silage bags, bale wrap, and temporary grain storage tubes. The primary operational boundary is wind speed inside the factory below 1.5 m/s; otherwise ambient air movement generates gauge bands across the layflat, and the bands are visibly darker in carbon-black-loaded films.
Collation shrink webs containing 70–90 wt% PF-0218-D and 10–30 wt% high-pressure LDPE are extruded at 50–100 μm thickness for beverage bottle multipacks and boxed goods. The LDPE fraction is not inert; it increases bubble stability at high blow-up ratios and broadens the hot-knife seal cutting range, but it lowers torsional stiffness of the final shrink film at 3–5% additions. Transverse-direction free shrink measured under ASTM D2732 at 110 °C is typically held between 10% and 20%, while at 130 °C the value reaches 20–35%. Shrink tension measured under ASTM D2838 on 75 μm film is commonly between 0.5 N/cm and 1.5 N/cm; if the transverse force exceeds 1.5 N/cm, low-weight paperboard bundling may show panel deflection. The hot-knife seal boundary is a processing conflict: PF-0218-D melts sharply but oxidative residue accumulates on knife surfaces above 180 °C, while below 140 °C the cut remains stringy and seal failures are observed at the overlap. Industrial lines therefore use knife-temperature controllers with ±5 °C deviation alarms and ceramic-coated knife bars to reduce char adhesion. Gauge uniformity after shrink is tied to die-gap profile and air-ring pressure, not to melt temperature alone. Compliance is generally FDA 21 CFR 177.1520 for incidental food-contact outer wraps, with EU 10/2011 migration testing required if direct food contact cannot be excluded. The terminal output is a collation wrapper formed by side-seal and cut-seal jaws; the overlap seal strength is validated with ASTM F88 after the package cools below 40 °C.
Palletized construction-product stretch hood film uses PF-0218-D as the toughening component in blends with 10–20 wt% hexene or octene metallocene LLDPE. The blend is extruded at 50–150 μm thickness on high-output blown film lines with die diameters of 300–500 mm, dual-lip air rings, and blow-up ratios of 3.5:1 to 4.5:1. Barrier-flight screw design with length-to-diameter ratio of 30:1 is necessary; conventional metering screws produce melt-temperature heterogeneity above 240 °C when output exceeds 250 kg/h. Puncture resistance is assessed with ASTM D5748; the puncture-propagation threshold is not linear with metallocene content. Below 10 wt% metallocene LLDPE, the film may achieve tensile yield but fail by propagation from corner folds at pre-stretch ratios above 80%. Above 20 wt%, the blend loses modulus and the hood becomes too extensible at a given film thickness, requiring gauge corrections of 10–15 μm to maintain load retention. Haze measured under ASTM D1003 for PF-0218-D-rich monolayer film exceeds that of metallocene film by 3–5 percentage points, which is acceptable for industrial pallet covers but not for retail display overwrap. The terminal product is a stretch hood applied at pre-stretch ratios of 60–100%; corner thickness after application is the critical failure zone. Compliance includes EU 94/62/EC and heavy-metal screening, with no food-contact assumption unless tested under EU 10/2011. Published data for PF-0218-D in stretch hood coextrusions above 200 μm is limited.
For extrusion lamination and coating onto oriented polypropylene or polyethylene terephthalate, PF-0218-D is processed as the sealant web at coat weights of 12–30 μm. Melt temperature at the die lip is held at 315–330 °C; this range is required for oxidative adhesion to primer-treated substrates, but it also degrades the polymer if residence time exceeds 90 seconds. A typical laminating line uses a 90 mm extruder with 30:1 L/D, a T-slot die of 1500–2500 mm width, and an air gap of 100–180 mm between die exit and nip. Substrate surface tension is maintained at 42–48 dyn/cm before lamination; lower values produce peel failures under ASTM D1876 at the substrate interface. Heat-seal strength of the PP/LLDPE or PET/LLDPE laminate is measured with ASTM F88 at a sealing dwell of 0.5 s and jaw temperature of 150 °C; values below 8 N/15 mm typically indicate inadequate oxidative bonding or excessive gauge variance. PF-0218-D is limited to non-retort structures because the crystalline melting region of 0.918 g/cm³ LLDPE cannot sustain seal integrity at 121 °C retort conditions. Food-contact compliance for the sealant layer is governed by FDA 21 CFR 177.1520 and EU 10/2011, with organoleptic testing recommended for high-flavour barrier laminates. Terminal products include dry-food stand-up pouch sealant webs, lidding films for dairy cups, and sachet layers, provided the sealant layer is not specified for hot-fill above 80 °C.
Geomembrane sheet coextrusion is a boundary application for PF-0218-D because the resin’s density of 0.918 g/cm³ and lower stress crack resistance than high-density polyethylene impose constraints under GRI GM13. The resin may be used as a secondary or white/black coextruded layer, but it is not recommended as the primary stress-bearing layer in landfill liners unless supported by notch tensile load testing. Flat-die lines used for such structures typically have slot widths of 2000–3500 mm, automatic gauge control to ±5%, and polished roll stacks maintained at 60–90 °C. Stress crack resistance is evaluated with ASTM D1693 single-point notched bent strip testing in 10% Igepal CO-630 at 50 °C, while long-term stress cracking under load is evaluated with ASTM D5397. Published data for PF-0218-D under ASTM D5397 at 50 °C is limited; therefore, any substitution into a primary liner without generating comparative data on the exact fusion-welded seams is technically unsupported. When the material is used in secondary layers, blending with 10–20 wt% HDPE or high-alpha-olefin LLDPE is common to increase modulus and reduce edge tear. Terminal products include temporary evaporation pond liners, landfill cap drainage sheets, and protective geotextile-backed cover panels. Compliance for geomembranes falls under GRI GM13 for HDPE and GRI GM17 for LLDPE smooth liners; seam strength is tested under ASTM D4437 and peel separation under ASTM D6392. The operational boundary is low-temperature crack resistance; PF-0218-D retains flexibility at -40 °C in laboratory low-temperature brittleness tests, but field installation at sub-zero temperatures requires cold-bend testing of the specific welded seam.
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NOVAPOL LLDPE PF-0218-D is a linear low density polyethylene film resin supplied with a slip and antiblock additive package. The nominal density is 0.918 g/cm³ when measured according to ASTM D1505, and the melt mass-flow rate is 2.0 g/10 min under ASTM D1238 at 190 °C and 2.16 kg. The product is specified for blown-film conversion where gauge reduction, surface slip, and continuous web handling are critical. It is not a metallocene-catalyzed resin; the molecular architecture is typical of conventional Ziegler-Natta LLDPE film grades, with a balance between extrusion pressure and dart impact resistance.
A converter selecting this grade for heavy-duty liners or industrial packaging typically evaluates it against a fractional-melt LLDPE for toughness and against an LDPE grade for bubble stability. The differentiating parameters are not limited to melt index; die gap, frost line height, and air-ring temperature profile shift the tear/impact balance more than density alone. In practice, PF-0218-D is blended with LDPE in ratios of 10% to 30% LDPE on high-stalk torn-bubble lines to improve strain hardening.
The base resin has a low density that supports tear resistance and flexibility at thicknesses from 20 µm to 80 µm. The melt index of 2.0 g/10 min positions the material above fractional-melt film grades, reducing screw torque and melt pressure on grooved-feed extruders with length-to-diameter ratios of 30:1. At the die, a melt temperature of 200 °C to 220 °C is recommended; excursions above 230 °C increase oxidation risk in high-residence-time zones.
Because the density is 0.918 g/cm³, the resin retains ductility at low temperatures, but the exact ductile-to-brittle transition depends on film gauge, cooling rate, and antiblock concentration. The slip additives migrate to the surface over time; immediately after extrusion, the coefficient of friction can be higher than the equilibrium value measured after 24 h at 23 °C and 50% relative humidity.
| Property | Method | Nominal Value |
|---|---|---|
| Density | ASTM D1505 | 0.918 g/cm³ |
| Melt mass-flow rate | ASTM D1238 (190 °C/2.16 kg) | 2.0 g/10 min |
| DSC peak melting point | ISO 11357-3 | 121 °C typical |
| Recommended melt temperature | process parameter | 200–220 °C |
Because the density is controlled by the comonomer fraction, solid-state properties are governed by the concentration of short-chain branches along the ethylene backbone. At 0.918 g/cm³, the crystallinity is lower than in high-density polyethylene, creating lower modulus and higher elongation before yield. The DSC peak melting point near 121 °C means that the resin remains processable at lower temperatures than HDPE; it also expands the heat-sealing window for multi-layer films. However, the low melting point reduces heat resistance in hot-fill or shrink applications above 60 °C.
In capillary rheometry, the shear-thinning behavior of PF-0218-D is less pronounced than in LDPE because of the absence of long-chain branching. This means that die pressure does not fall as steeply with increasing screw speed. On a blown-film line, the die pressure at a fixed screw speed may be higher than LDPE at the same melt index, despite similar melt index. The practical consequence is that a grooved-feed extruder with an L/D of 30:1 and a barrier screw provides better output stability than a smooth-bore extruder of the same diameter.
On a high-output blown-film line, the first process limitation is usually melt fracture at the die exit. With PF-0218-D, die gaps below 1.5 mm at high shear rates can produce sharkskin on the surface of thick film; increasing the die gap to 2.0–2.5 mm transfers more orientation to the bubble and preserves optical uniformity. The recommended blow-up ratio is 2.0:1 to 2.5:1, with frost line height set between 8 and 10 die diameters. On lines where the frost line is set lower than 6 die diameters, film blocking can increase even with the incorporated antiblock.
For 45 mm to 75 mm grooved-feed extruders, barrel profile typically begins at 175 °C in the first zone, rises to 200 °C in the compression zone, and maintains 210 °C at the adapter. Melt pressure at the screen pack commonly falls between 180 bar and 240 bar, depending on screw speed and backpressure valve settings. When the pressure is below 150 bar, mixing may be insufficient; when above 280 bar, screen-pack life shortens and motor load increases without proportional output gain.
The slip package reduces film-to-film coefficient of friction to a typical equilibrium range of 0.10 to 0.20 under ASTM D1894. The value is thickness-dependent; thin films below 15 µm may show increased blocking because antiblock surface area becomes more concentrated. Corona treatment of the printed surface should be performed after 24 h of additive migration because early treatment can be partially masked by freshly bloomed slip additives. Dyne level after treatment commonly targets 38 to 42 mN/m for solvent-based lamination, but the required retention depends on the ink and adhesive system.
The melt index is an inverse indicator of molecular weight. A resin with 2.0 g/10 min flows more readily than a fractional-melt grade with 0.8 g/10 min; the penalty is reduced extensional stress at the frost line and lower dart impact and Elmendorf tear in thin films. Converters replacing a fractional-melt LLDPE with PF-0218-D should expect lower dart impact unless the gauge is increased or the blow-up ratio is adjusted. Dart impact is measured by ASTM D1709 and tear by ASTM D1922; these properties are not isotropic and respond differently to die gap.
Compared with LDPE of similar melt index, PF-0218-D has higher tensile strength and greater puncture resistance because of the linear backbone and reduced long-chain branching. However, LDPE exhibits stronger strain hardening during bubble inflation, which improves stability on high-stalk lines. A practical formulation for difficult bubble geometries replaces 15% to 25% of PF-0218-D with LDPE; this blend raises extensional viscosity without requiring a die gap change. Against hexene- or octene-based LLDPE of equal density and melt index, PF-0218-D may show lower dart impact and tear resistance when short-chain branching distribution is less effective at creating tie chains. Published comparative data for this specific configuration is limited; the selection should be validated on the production line using 38 µm film and 10-roll laboratory trials.
The D suffix denotes a formulated grade. If a converter runs a non-additivated base resin of the same 0.918 g/cm³ density and 2.0 g/10 min melt index, film-to-film blocking and slitting friction are typically higher. Converting machines with low web tension may still run the base resin, but high-speed bag machines generally require the slip-modified surface. The specific additive loading is not intended to replace heavy corona treatment or primer application for lamination.
Tensile properties measured under ASTM D882 are anisotropic because the bubble imparts orientation primarily in the machine direction unless the blow-up ratio is increased. At a blow-up ratio of 2.5:1, machine-direction and transverse-direction elongation values converge, but dart impact remains a function of film thickness. A 25 µm film produced on a high-output line does not possess the same impact resistance as a 50 µm film of the same resin; gauge reduction must be confirmed by dart drop impact ASTM D1709 values measured on the production line, not on a laboratory cast plaque.
Although PF-0218-D is usually specified for blown film, cast-film trials at throughputs above 180 kg/h on a 75 mm grooved-feed extruder require control of chill-roll temperature and air gap. In cast film, the resin solidifies on a polished roll held at 15 °C to 25 °C; higher roll temperatures reduce film clarity and increase blocking because the slip additive migration is delayed. The air gap should not exceed 10 cm; longer gaps reduce melt-to-roll contact and increase neck-in and dimensional variability.
At these throughputs, melt pressure can approach the upper limit of the screen changer. A static mixer after the die adapter can reduce temperature gradients to below ±2 °C across the die width. Surface defects observed as diagonal chevrons near the die lip are often indicative of high shear at the die land; increasing the die gap to 0.6–0.8 mm or raising the die temperature by 5 °C can shift the shear rate below the critical value. No post-extrusion drying is required; the resin is not hygroscopic, but surface condensation from storage in ambient relative humidity above 80% can generate bubble or cast-film pinholes.
Melt fracture, bubble instability, and low gloss on PF-0218-D are commonly corrected by raising die temperature rather than increasing screw speed. Because the material has a narrow processing window relative to LDPE, die-lip deposits from oxidized additive can accumulate over extended runs; cleaning the die lip after every 48 h of continuous operation reduces specks and edge tear. On lines with internal bubble cooling, the internal air temperature should be kept below 45 °C; higher values destabilize the frost line and increase blocking.
The base polyethylene is intended for food-contact applications only when the finished article meets the applicable end-use test requirements. For US packaging, the resin may be evaluated under 21 CFR 177.1520; for EU applications, Regulation (EU) No 10/2011 establishes overall migration and specific migration limits. The additive package in PF-0218-D is supplied to function within these frameworks, but pigments, processing aids, adhesives, and recycled content can shift the compliance status of the final film.
| Standard or Regulation | Scope | Relevant Limit |
|---|---|---|
| 21 CFR 177.1520 | Olefin polymers for food contact | Extractives and end-use conditions |
| Regulation (EU) No 10/2011 | Plastic food-contact materials | Overall migration ≤ 10 mg/dm² |
| REACH (EC) No 1907/2006 | Registration and SVHC screening | Candidate list assessment |
| RoHS 2011/65/EU | Electrical/electronic equipment | Pb ≤ 1000 ppm; Cd ≤ 100 ppm |
For outdoor service, unstabilized polyethylene degrades under ultraviolet exposure; PF-0218-D is not a UV-stabilized grade unless the converter adds a masterbatch. Contact with strong oxidizing agents, aromatic solvents, or chlorinated hydrocarbons at elevated temperature should be avoided because these materials can swell the polymer and accelerate environmental stress cracking. In coextrusion with polar barrier resins such as EVOH or polyamide, a tie layer is required; direct contact produces interfacial instability and delamination under flexural fatigue.
Warehouse storage should remain below 40 °C and away from direct ultraviolet exposure. Bags should be conditioned to processing floor temperature before transfer into the extruder feed hopper to avoid condensation. At start-up, purging with a lower-viscosity LDPE or commercial purge compound is recommended when changing from a high-molecular-weight HDPE; residual HDPE can cause visible gels and interfacial streaks for up to 30 min unless the die and adapter are cleaned.
