| HS Code | 947595 |
| Density | 0.918 g/cm³ |
| Melt Index 190 C 2 16 Kg | 2.0 g/10 min |
| Melt Flow Ratio | 28 |
| Vicat Softening Point | 102 °C |
| Brittleness Temperature | -75 °C |
| Tensile Strength At Yield | 12 MPa |
| Elongation At Break | 700 % |
| Dart Drop Impact F50 1 Mil Film | 130 g |
| Elmendorf Tear Strength Td 1 Mil Film | 450 g/mil |
| Haze 1 Mil Film | 12 % |
As an accredited NOVAPOL LLDPE PF-0218-B factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | NOVAPOL LLDPE PF-0218-B is packaged as free-flowing pellets in 25 kg lined bags, shipped in 1,000 kg quantities. |
| Container Loading (20′ FCL) | 20′ FCL: NOVAPOL LLDPE PF-0218-B resin loaded as 25 kg bags on pallets, shrink-wrapped, container stowage secured. |
| Shipping | NOVAPOL LLDPE PF-0218-B ships as solid pellets in lined bags, bulk bags, or railcars. Store in dry, ventilated areas away from heat, ignition sources, and oxidizers. Avoid dust accumulation; use grounded equipment to prevent static discharge. Handle with appropriate PPE and follow SDS guidelines for safe transport. |
| Storage | Store NOVAPOL LLDPE PF-0218-B in a clean, dry, well-ventilated area protected from direct sunlight, moisture, and heat sources. Keep in original sealed packaging to prevent contamination and dust accumulation. Avoid stacking excessively. No special temperature control is required, but maintain moderate conditions. Use within a reasonable timeframe to ensure product performance. |
| Shelf Life | Shelf life is indefinite if stored in a dry, shaded area away from heat and contamination. |
Machine-direction pallet-wrap film is converted from NOVAPOL LLDPE PF-0218-B on high-output cast film lines rather than blown film towers because the nominal 2.0 g/10 min melt index at 190 °C/2.16 kg under ISO 1133-1:2022 and nominal density of 0.918 g/cm³ under ISO 1183-1:2019 permit the melt curtain to be quenched on a polished chill roll before tensile orientation is introduced. Typical production lines using 150 mm single-screw extruders with 30:1 L/D barrels run a rising temperature profile from 180 °C in the feed zone to 250 °C at the adapter, with the flat die held at 240–265 °C and a die gap of 0.5–0.7 mm. Under these conditions the web is drawn to 20–30 µm at speeds above 200 m/min without sustained draw resonance, provided the air knife and vacuum box are positioned within 10–20 mm of the die exit and the chill roll surface is controlled at 20–30 °C. The unstretched film is subsequently oriented on prestretch rollers at ratios of 200–300%; above 300%, gauge bands and variable unwind tension become more frequent on trailer-mounted wrappers when ambient temperature drops below 5 °C. Since PF-0218-B is supplied without slip or antiblock, pallet-wrap converters generally add a cling skin layer based on ultra-low density ethylene copolymer or polyisobutylene at 2–4 wt% in coextrusion, while the core remains PF-0218-B. Coefficient of friction changes after winding are measured under ASTM D1894 because polyisobutylene migration from the skin into the unmodified core can occur over 24–72 h and alters unwinding tension and load retention. Machine-direction tensile elongation of the unstretched 20 µm film is measured under ASTM D882; published data for 0.918 g/cm³ butene LLDPE cast film show elongation values above 500%, but converter-specific results depend on quench rate, die temperature, and orientation history.
In high-speed flexible packaging lines, PF-0218-B is used as a sealant web inside laminated or coextruded structures for snacks, baked goods, and dry foods, where seal initiation temperature and hot-tack strength determine the maximum bagger speed without seal failure. In a typical laminated snack pouch, the structure is 12 µm biaxially oriented polyester, 15 µm aluminum foil, and a 25–40 µm PF-0218-B sealant web, with solventless adhesive applied at 1.6–2.4 g/m². At a seal bar dwell of 0.5 s and jaw pressure of 0.3 MPa, heat-seal tests conducted under ASTM F2029 show that butene LLDPE of 0.918 g/cm³ density begins to form measurable seal strength at 95–110 °C, which is lower than the 105–130 °C range typical for high-pressure LDPE sealant webs of the same thickness. The broad DSC melting peak near 122 °C under ISO 11357-3:2018 means the seal plateau is wider and more tolerant of dwell-time variation than an ethylene vinyl acetate sealant, although the final jaw temperature must still be profiled for each machine. Hot-tack testing under ASTM F1921 at 120 °C with a 0.5 mm film specimen and 0.3 s cooling time is used to verify that the seal can support product drop weight before crystallization is complete; published studies on 0.918 g/cm³ butene LLDPE cast grades report hot-tack values exceeding 2.0 N/15 mm under these conditions, though exact values require line-specific seal jaw geometry. For food-contact structures, the base polyolefin falls within FDA 21 CFR 177.1520(c) 3.1a, but the finished laminate or coextrudate must individually meet migration and organoleptic requirements under EU Regulation (EU) No 10/2011 and applicable national standards. The table below summarizes the regulatory verification matrix for converters using PF-0218-B in food-contact sealant webs.
| Jurisdiction | Standard or regulation | Verification requirement for finished structure |
|---|---|---|
| United States | FDA 21 CFR 177.1520(c) 3.1a | Polyolefin may be used in food-contact articles; finished article requires end-use extraction testing consistent with FDA aqueous and fatty food protocols. |
| European Union | EU Regulation (EU) No 10/2011 | Overall migration limit of 10 mg/dm² or 60 mg/kg; specific migration of additives must comply with Annex I restrictions. |
| China | GB 9685-2016 | Additives in food-contact materials must be listed in the positive list and used within prescribed migration or quantity limits. |
| Mercosur | GMC Res. No. 02/12 | Total migration limit of 8 mg/dm² or 50 mg/kg; simulant selection follows food type and contact conditions. |
Converters should not rely on base resin compliance alone; corona treatment, printing inks, adhesives, and added slip or antiblock masterbatches alter the migration profile and require extraction testing under the conditions specified in EU Regulation (EU) No 10/2011 Annex III.
Heavy-duty liners and sack films converted from PF-0218-B are processed on the same cast film lines but require different gauge control and winding discipline because the higher caliper increases heat removal limitations and can create blocking if the web is wound too warm. At 50 µm, a 0.918 g/cm³ film quenched on a 20–25 °C chill roll can be slit and wound at line speeds near 150 m/min; increasing the caliper to 100 µm requires either reducing line speed to 70–100 m/min or adding a secondary chill roll because the center of the web retains heat and can deform in the winding nip. Thickness uniformity across a 2.5 m wide web should be held within ±5% for automated sack filling and palletizing, which is normally achieved with automatic die bolt control and a beta gauge feedback loop. At 100 µm, the film retains ductile tear propagation under ASTM D1922 and low-temperature flexibility suitable for cold storage because the density is below 0.920 g/cm³; however, PF-0218-B contains no UV stabilizer or carbon black, so outdoor storage beyond 6 months requires a HALS or carbon black masterbatch at 2–4 wt% to prevent embrittlement. For drums and box liners requiring static dissipative behavior, an antistatic masterbatch must be incorporated because the base resin has high surface resistivity; converters typically target 109–1011 Ω surface resistivity under IEC 61340-2-3 at 12% RH. Heavy-duty sack construction often combines PF-0218-B with high-pressure LDPE or recycled post-industrial LLDPE at 10–20 wt%; such blends reduce dart impact under ASTM D1709 Method A and lower melt strength, so the blend ratio must be confirmed by drop-testing filled sacks under ASTM D5276.
In silage bale wrapping, the oxygen transmission rate of a 25 µm cast film made from PF-0218-B becomes the controlling variable after six or more film layers are applied, because the individual layer’s barrier is not the relevant specification but the wrapped bale’s total oxygen ingress over the fermentation period. Unstretched 25 µm film from a 0.918 g/cm³ butene LLDPE typically exhibits an oxygen transmission rate in the range of 4,000–6,000 cm³/(m²·day·atm) under ASTM D3985 at 23 °C and 0% RH; the layered structure after stretch wrapping reduces passive oxygen diffusion, but the exact value after prestretch depends on film thickness distribution and layering count. Puncture resistance measured under ASTM D5748 is more useful than tensile strength for predicting field survival against crop stalks and twine compression; 0.918 g/cm³ cast grades generally provide puncture propagation resistance because the low crystalline content delays sharp crack growth, although no specification should be established without field trials on the target crop. The base resin is not formulated with UV stabilizers, anti-fog agents, or oxygen barrier modifiers, so unstabilized film exposed to direct sunlight may embrittle after 300–500 h of accelerated weathering under ISO 4892-2; a black or white silage film therefore requires a weathering masterbatch and, for white film, a titanium dioxide concentrate sufficient to reduce UV transmission below 10%. Processing on cast lines with 150 mm extruders and 30:1 L/D screws is identical to pallet wrap up to 25 µm, but wider silage film above 750 mm requires dual air knives and edge pinning to maintain flatness across the chill roll. The absence of antiblock in PF-0218-B can raise blocking force on a tightly wound silage roll stored in direct sun, so converters add an antiblock masterbatch at 5–10% or reduce winding tension to below 1.0 N/mm of web width.
Cast films produced from PF-0218-B are used as sealant webs in solventless and solventborne adhesive laminations with biaxially oriented polyester, biaxially oriented polypropylene, or aluminum foil, where surface energy before adhesive coating determines bond uniformity. Corona treatment is applied after the chill roll and before the first winding station at a discharge level of 1.5–2.5 W·min/m²; the treated surface should measure 38–42 dyn/cm under ASTM D2578 immediately after treatment. If the film is stored at 23 °C and 50% RH, the surface energy of an untreated or lightly treated LLDPE cast web decays over time as low-molecular-weight oxidation products and additives migrate to the surface; converted film should be laminated within 48–72 h of corona treatment unless an inline treater is available. Solventless polyurethane adhesives require a surface tension of at least 36 dyn/cm at application to wet the film without retraction, while waterborne acrylic or epoxy systems may require 40 dyn/cm or higher; bond strength after lamination is measured under ASTM D1876 T-peel and is generally specified above 200 gf/15 mm for flexible packaging. Excessive corona treatment above 2.5 W·min/m² can produce oxidized surface species that increase wetting but reduce heat-seal strength because the sealant surface is no longer clean polyolefin; this trade-off is critical when the laminate is used in hot-fill or high-speed pouch applications. Because PF-0218-B contains no slip or antiblock additive, lamination converters can control coefficient of friction independently with a non-migrating masterbatch; the target kinetic COF under ISO 8295 is typically 0.20–0.30 for pouching equipment.
Vertical and horizontal form-fill-seal machines convert PF-0218-B into pouches and stick packs where the sealing layer must form load-bearing bonds before the seal cools or before product weight strikes the seal area. The resin’s melt index of 2.0 g/10 min under ISO 1133-1:2022 provides a wider processing window on rotary FFS lines than a 1.0 g/10 min LLDPE because the melt fills the seal bar serration pattern at lower jaw pressure and shorter dwell; sealing temperatures on rotary sealers are commonly set between 115 °C and 130 °C for 20–30 ms dwell, depending on film caliper and machine speed. Hot-tack measurements under ASTM F1921 at 120 °C and 0.3 s cooling time are used to set the maximum bagger speed; if hot-tack drops below 1.5 N/15 mm, lighter snack foods may still seal but heavier frozen food packs can open at the bottom gusset. The base resin without slip and antiblock can exhibit kinetic COF above 0.7 under ISO 8295 against stainless steel, which may cause film tracking failures on VFFS forming collars; converters add a slip masterbatch to reduce kinetic COF to 0.20–0.30 and an antiblock masterbatch to prevent film-to-film adhesion during unwind. Static seal strength after complete cooling is measured under ASTM F88/F88M; 25 µm cast film typically achieves heat-seal strengths above 10 N/25 mm when sealed at 130 °C and 0.5 s dwell, but seal bar temperature and pressure must be profiled on each FFS line because serration geometry and coated bars shift the actual interface temperature. For frozen food packaging, the film should also be tested for flex-crack resistance under ASTM F392 after 10 flex cycles at -20 °C; any pinholing before the target shelf life indicates that a lower-density or thicker sealant layer should be used.
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NOVAPOL LLDPE PF-0218-B is a butene-based linear low-density polyethylene resin developed for blown-film extrusion. The manufacturer’s published specification assigns a nominal melt index of 2.0 g/10 min when measured at 190 °C under a 2.16 kg load according to ISO 1133-1:2022 or ASTM D1238, and a nominal density of 0.918 g/cm³ when determined by ISO 1183-1:2019 or ASTM D792. The base resin is a conventional Ziegler-Natta product with butene as the primary short-chain branch source. The suffix designation indicates a specific additive package; published data for the exact additive concentrations in PF-0218-B is limited. The certificate of analysis should be consulted for lot-specific melt index, density, and stabilizer levels before extrusion parameters are fixed.
The 2.0 g/10 min melt index places PF-0218-B in the higher-flow region of the NOVAPOL LLDPE film portfolio. That flow level reduces die pressure and screw motor load compared with a 1.0 g/10 min grade of equivalent density, but it also reduces melt strength. The practical consequence is a narrower bubble-stability window under high-output conditions and a more pronounced sensitivity to cooling-air turbulence.
Processing of PF-0218-B on mono-layer blown-film lines is generally carried out on single-screw extruders with a length-to-diameter ratio of at least 24:1 and a barrier or Maddock mixing section. A typical barrel profile increases from 170 °C in the feed zone to 210 °C in the metering zone, with melt temperature at the die lip maintained between 200 °C and 230 °C. Temperatures above 240 °C should be avoided because oxidative degradation can form gel bodies; temperatures below 190 °C often produce insufficient homogenization and surface melt fracture.
The die gap recommendation for PF-0218-B depends on the target gauge. For final film from 25 µm to 100 µm, a die gap of 1.5 mm to 2.5 mm is typical. A die gap above 3.0 mm increases residence time and can shift the oxidation balance unfavorably. A die gap below 1.2 mm raises die pressure and may initiate sharkskin at lower screw speeds. Blow-up ratios are normally held between 1.8:1 and 2.8:1. At blow-up ratios above 3.0:1, bubble shoulder instability becomes more frequent with this melt index unless the frost-line height is raised and air-ring velocity is reduced.
The melt-fracture boundary for this class of butene LLDPE is often reached when apparent wall shear rate in the die exceeds 100 s-1 to 150 s-1, although the exact threshold is die-geometry dependent. If sharkskin appears at target output, the preferred interventions are to increase melt temperature inside the specified range, adjust die-lip temperature by 5 °C to 10 °C, or use a fluoropolymer processing aid. Reducing screw speed is not automatically required; a die-temperature change can shift the onset to a higher throughput. Published data for this specific configuration is limited, and line trials are required to establish the actual boundary on a given extrusion line.
Air-ring selection is critical because PF-0218-B has lower melt strength than a low-melt-index LDPE. A dual-lip air ring with adjustable chimney is preferred for gauge uniformity. Internal bubble cooling can be used only if the line’s bubble positioning system is responsive enough for the lower-stability bubble; otherwise, oscillation and thickness variation may rise. The frost-line height should be kept high enough to allow the film to reach adequate tensile orientation but not so high that the bubble becomes prone to lateral movement.
Bubble stability with PF-0218-B is controlled by the balance between cooling-air velocity, die-to-nip distance, and frost-line height. If the frost line is too high, the molten bubble length increases and the bubble becomes sensitive to ambient air currents. If the frost line is too low, the film does not develop sufficient orientation, and gauge variation can increase. A dual-lip air ring permits independent adjustment of lower and upper air streams; for this resin, a moderate lower lip velocity with a slightly reduced upper lip velocity often stabilizes the bubble without freezing the frost line too abruptly.
At high ambient humidity, moisture condensation on pellet surfaces may introduce trace water into the hopper. This is not usually a hydrolysis issue because polyethylene is hydrophobic, but steam generated in the feed zone can cause surging and a variable melt pressure. If pellet surface moisture is visible, a hopper dryer at 60 °C is sufficient; higher dryer temperatures may soften pellets and cause bridging in the feed throat.
Melt strength and drawdown force for PF-0218-B should be measured with a capillary rheometer or Rheotens-type extensional rheometer if a change in resin lot or film grade is considered. Lower melt strength limits the maximum drawdown before bubble failure; however, the suspension of the bubble in an air-supported blown-film die is also affected by die design, line height, and ambient temperature. Published data for PF-0218-B in extension-dominated flows is limited, so direct pilot-line verification is required.
When PF-0218-B replaces a lower-melt-index LLDPE grade in heavy-duty liner production, the first observable change is usually lower die pressure at equivalent screw speed. Operators may increase screw speed by 10 % to 20 %, but the cooling-air system must have sufficient capacity to remove the additional heat. Without increased cooling-air capacity, the frost line drops and bubble stability deteriorates. The grade is suited to monolayer liners, industrial sacks, and overwrap where gauge is not below about 20 µm; below that thickness, the lower melt strength can promote bubble oscillation and film-thickness variation.
For thin-gauge liners below 25 µm, PF-0218-B is often blended with LDPE at 15 wt% to 30 wt%. The LDPE phase increases extensional viscosity and stabilizes the bubble neck, but it lowers dart impact and Elmendorf tear relative to the neat PF-0218-B film. The property change is non-linear; a 10 wt% LDPE addition may have minimal effect, while a 30 wt% addition can move the film outside the original toughness specification. The blend ratio should be validated for each structure and gauge before commercial conversion.
At equal nominal density and melt index, a butene-based LLDPE such as PF-0218-B generally exhibits lower dart impact and lower machine-direction Elmendorf tear than a hexene or octene grade. The reason is short-chain branch length: butene branches are less effective in forming tie chains across the crystalline lamellae. This generalization is supported by polyolefin film testing under ASTM D1709 and ASTM D1922, but grade-specific PF-0218-B values should be obtained from the manufacturer’s technical datasheet rather than inferred from resin-class averages.
Compared with a metallocene-catalyzed LLDPE of equivalent density, PF-0218-B has a broader molecular weight distribution characteristic of Ziegler-Natta polymerization. The broader distribution improves shear thinning and frequently lowers head pressure, but it typically raises haze and reduces gloss when tested under ASTM D1003 and ASTM D2457. In applications where optical clarity is not the controlling requirement, the processability advantage may be operationally significant. In high-clarity overwrap or display packaging, a metallocene resin or a metallocene-containing blend is generally more appropriate.
Compared with lower-flow NOVAPOL film grades of the same density, PF-0218-B has a higher melt index and therefore lower melt strength. The tensile modulus is not strongly affected by this change because modulus is controlled primarily by density and film orientation. The observable differences appear in drawdown, gauge uniformity, and maximum line speed before bubble instability. When switching from a 1.0 g/10 min grade, the frost line may need to be lowered or the blow-up ratio reduced to preserve bubble geometry.
PF-0218-B is not a direct substitute for high-alpha-olefin grades in demanding stretch-film or high-puncture applications. In stretch-wrap formulations, octene or metallocene grades usually provide superior puncture resistance and elongation retention. The butene grade is better positioned for commodity film applications where moderate toughness and stable processability are more important than extreme tensile or puncture performance.
Compliance claims for PF-0218-B should be verified with the supplier’s product stewardship documents. The base polyethylene may fall within the scope of U.S. FDA 21 CFR 177.1520(c) for olefin polymers when used under appropriate conditions, and it may be assessed under EU Regulation 10/2011 for plastic food-contact materials. Registration under REACH Regulation (EC) No 1907/2006 and restriction status under RoHS Directive 2011/65/EU are not automatically equivalent across every additive package; the specific PF-0218-B formulation requires confirmation from the resin supplier. The absence of a published statement for a particular food-contact use does not establish non-compliance.
Moisture absorption in PF-0218-B is negligible under normal storage conditions. Drying is not required unless free surface moisture or condensation is present. If condensation occurs, pre-drying at 70 °C to 80 °C for 2 h in a desiccant dryer is adequate; higher temperatures may cause pellet agglomeration. Prolonged storage in direct sunlight should be avoided because ultraviolet exposure consumes the surface stabilizer package and can increase gel formation during subsequent extrusion.
PF-0218-B is not formulated for injection molding, blow molding, or rotational molding as a primary resin. The molecular weight distribution, pellet geometry, and stabilizer package are tailored to blown-film production. Avoid blending with peroxide-curable polyolefins unless crosslinking is intentional. Acidic or halogenated flame-retardant systems can deactivate the hindered phenolic stabilizer and reduce the resin’s oxidative stability; published data for continuous use with strong oxidizing agents at process temperatures is limited.
In coextruded structures, PF-0218-B can be placed in the core layer to lower overall melt viscosity or in a sealing layer where a lower seal-initiation temperature is required relative to LDPE-rich skins. Heat-seal strength should be measured according to ASTM F88/F88M; the result depends on seal temperature, dwell time, and gauge. For PF-0218-B, the seal-initiation temperature is generally below that of LDPE and above that of low-density metallocene sealants, but published data for this specific configuration is limited. Pilot-line heat-seal curves should be generated before commercial qualification of packaging structures.
Film property comparisons should be based on specimens conditioned at 23 °C and 50 % RH for at least 40 h according to ISO 291. Tensile properties should be measured according to ISO 527-3 or ASTM D882 with a crosshead speed of 500 mm/min for film below 1.0 mm. Dart impact may be reported under ISO 7765-1 or ASTM D1709, and Elmendorf tear under ISO 6383-2 or ASTM D1922. Comparative claims between PF-0218-B and other products should state the method and conditioning history; without this information, numerical differences may reflect test variability rather than material performance.
When purging PF-0218-B from an extrusion line, a high-viscosity polyethylene purge material is usually selected to remove the lower-melt-index residence layer from the die. A direct transition from PF-0218-B to polyamide or PET is not permitted without an intermediate purge because incompatible resins and temperature differences can degrade in the die. The purge should be continued until the melt pressure and motor load stabilize at the target material values.
