| HS Code | 507870 |
| Product | NOVAPOL LLDPE FP-020-D |
| Material | Linear Low Density Polyethylene (LLDPE) |
| Comonomer | Butene |
| Density | 0.920 g/cm³ |
| Melt Index 190 C 2 16 Kg | 0.72 g/10 min |
| Melting Point | 122 °C |
| Vicat Softening Temperature | 105 °C |
| Tensile Yield Strength | 10.0 MPa |
| Tensile Ultimate Strength | 21.0 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 280 MPa |
| Shore D Hardness | 55 |
| Brittleness Temperature | -75 °C |
As an accredited NOVAPOL LLDPE FP-020-D factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | NOVAPOL LLDPE FP-020-D is supplied as free-flowing pellets in 25 kg bags, palletized and shrink-wrapped for safe handling. |
| Container Loading (20′ FCL) | Load 20′ FCL with NOVAPOL LLDPE FP-020-D resin in dry, clean container; secure pallets properly to prevent shifting. |
| Shipping | NOVAPOL LLDPE FP-020-D is a free-flowing polyethylene resin shipped as pellets in 25 kg bags, octabins, or bulk railcars/hoppers. Keep dry, avoid dust accumulation, and store away from heat/ignition sources. For ocean transport, it is non-hazardous, non-biodegradable, and suitable for standard dry cargo containers. |
| Storage | Store NOVAPOL LLDPE FP-020-D in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture contamination. Avoid generating dust and static electricity. Maintain indoor temperatures below 50°C (122°F) and protect from mechanical damage. Follow SDS guidelines for safe handling. |
| Shelf Life | Shelf life is 12 months from date of shipment when stored in dry, clean conditions away from direct sunlight. |
On single-screw blown film lines equipped with a 30:1 L/D barrier screw and dual-lip air ring, FP-020-D is extruded within a melt temperature window of 190–220°C. The resin is characterized by a nominal density of 0.920 g/cm³ (ASTM D792) and a melt index of 2.0 g/10 min (ASTM D1238, 190°C/2.16 kg). In frozen-food packaging operations, the film is commonly converted at 25–50 µm, with a blow-up ratio between 2.5:1 and 3.0:1 and a frost-line height held between 300 mm and 500 mm. Because FP-020-D is supplied without slip or antiblock, slitting and bag conversion require 0.5–1.5 wt% of a food-contact-approved slip/antiblock masterbatch to prevent blocking. The same additive package shifts the heat-seal initiation range to approximately 95–110°C depending on dwell time and jaw pressure. Direct food-contact status is evaluated under FDA 21 CFR 177.1520(c) for olefin polymers and the overall migration limit of 10 mg/dm² under EU Regulation (EU) No 10/2011. Frozen vegetable pouches, IQF fruit bags, and poultry ice-glaze liners use this configuration, as the 0.920 g/cm³ density provides low-temperature crack resistance at storage temperatures down to −35°C. Converters must verify that the selected antiblock and slip masterbatch carries the same regulatory compliance as the base resin, particularly where high slip levels alter seal initiation.
High-stalk tubular extrusion of FP-020-D exposes a conflict between output and bubble stability because butene-comonomer LLDPE develops lower elongational viscosity than high-pressure LDPE at typical haul-off speeds. In a high-stalk setup using a 1.2–1.8 mm die gap and a frost-line height of 400–700 mm, the bubble can enter a periodic rocking mode when the blow-up ratio exceeds 2.8:1. Blending 20–30 wt% high-pressure LDPE into FP-020-D raises the melt strength and damps the oscillation without requiring a higher melt temperature. For a 150 mm die, exhaust air for external cooling is normally set between 2 m³/min and 4 m³/min, but the setpoint is line-specific because the goal is to hold the frost line below the upper bubble shoulder. Surface melt fracture or shark-skin texture on the die land can be controlled with 0.3–0.5 wt% fluoropolymer processing aid; this is particularly relevant at line speeds above 45 m/min. Melt temperature should not exceed 240°C for extended residence time because gel counts increase and carbonized deposits can accumulate on the die lip. The resulting heavy-duty film is used for industrial wrapping films, protective equipment covers, and non-critical liners, where the blend ratio is adjusted to balance puncture toughness and bubble stability.
Cast film conversion of FP-020-D into machine pallet wrap subjects the polymer to a different thermal and cooling history than tubular extrusion. The melt temperature at the adapter is set between 230°C and 250°C, while the coathanger slot die gap is maintained at 0.5–0.8 mm. The air gap between die exit and chill roll is typically 20–30 mm; this gap is the primary control for neck-in and draw resonance. At draw ratios above 25:1, periodic thickness bands appear unless the air gap is shortened and the chill roll surface temperature is held at 28–30°C. Neck-in of 15–25% is inherent to LLDPE cast film, and edge trim is reprocessed back into the feed stream at a maximum of 10–15 wt% to avoid gel accumulation. A machine pallet wrap formula often contains 1.5–3.0 wt% polyisobutylene cling agent and 2–5 wt% tackifier masterbatch, but this formulation is not intended for food contact. Film at 23 µm is converted on high-speed wrappers and tested for peel cling according to ASTM D5458-18 and tensile properties according to ASTM D882; typical elongation at break exceeds 400% in the machine direction. The operational boundary is that post-consumer recycled resin should not be introduced into this formula because uncontrolled slip and tackifier migration can create sticky telescoped rolls.
In five-layer barrier packaging for dry and frozen products, FP-020-D is positioned as the sealant skin in the symmetrical structure FP-020-D / tie / EVOH / tie / FP-020-D. Sealant skin thickness is held at 10–12 µm on each side, while the total film thickness is typically 44–54 µm. The sealant layer’s density of 0.920 g/cm³ keeps the seal initiation temperature at 95–110°C when jaw dwell is 0.3–0.5 s and jaw pressure is 0.2–0.4 MPa. Seal strength is measured according to ASTM F88/F88M-23 and normally falls in the range 15–25 N/25 mm. The sink-in defect occurs when the sealant softens and penetrates microcracks or oriented EVOH defects during sealing, producing thinning at the seal edge and premature failure; it is controlled by keeping the sealant skin below 15 µm and by ensuring the EVOH layer remains below its crystallization onset during downstream transport. High-speed vertical form-fill-seal lines add 5–10 wt% of an antiblock masterbatch to the sealant layer to prevent jaw sticking. Food-contact compliance for this structure is tied to FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011, but the entire multilayer structure, including the tie and EVOH layers, must be covered by a favorable migration assessment.
| Application Segment | Regulatory or Test Framework | Method Designation | Key Parameter / Limit |
|---|---|---|---|
| Frozen food blown film | FDA 21 CFR 177.1520(c) | Density per ASTM D792 | Nominal density 0.920 g/cm³; MI 2.0 g/10 min |
| Frozen food blown film (EU) | EU Regulation (EU) No 10/2011 | EN 1186-1:2022 | Overall migration 10 mg/dm² |
| Cast stretch wrap | Industrial, no food-contact claim | ASTM D5458-18 | Peel cling and unwind force |
| Five-layer lamination sealant web | FDA 21 CFR 177.1520(c) and EU 10/2011 | ASTM F88/F88M-23 | Seal strength 15–25 N/25 mm at 0.3–0.5 s dwell |
| Heavy-duty sack film | ISO 7965-2:2020 | Drop test per ISO 7965-2 | No sack rupture after specified drop cycle |
| Industrial liner | ISO 175:2010 | Chemical resistance by immersion | Mass change and tensile retention after immersion |
Industrial sack lines producing 100–150 µm heavy-duty shipping sacks commonly run a ternary blend of 70 wt% FP-020-D, 20 wt% high-pressure LDPE, and 10 wt% internal trim or post-industrial reprocess. The LDPE component supports bubble stability at 2.5:1 to 3.2:1 blow-up ratio, while the reprocessed fraction lowers the melt viscosity but also raises gel count and film ash. Melt temperature is controlled between 190°C and 220°C, and the die gap is expanded to 1.8–2.2 mm to reduce shear heating and die-lip build-up. On a 1200 mm lay-flat line, output is limited by cooling-air capacity rather than extruder torque; operators must inspect edge welds at the collapse frame because reprocessed LLDPE can induce a visible gel streak at the crease. A sack converter often sets a minimum dart impact of 500 g for 100 µm film under ASTM D1709 method A and uses Elmendorf tear resistance under ASTM D1922 to reject side-gusset material below the specified tear threshold. Reprocessed feedstock should not exceed 20 wt% because the loss of dart impact becomes non-linear beyond this point and the sack can fail in drop testing according to ISO 7965-2:2020. End products include fertilizer sacks, resin pellet packaging, side-gusset sandbags, and heavy-gauge trash bags.
Because industrial liner stock is specified for mechanical containment rather than true gas or solvent barrier, FP-020-D is used only where the service conditions do not exceed the resin’s known chemical resistance envelope. Typical liner thickness is 150–250 µm, produced on a blown film line with a 3.0:1 blow-up ratio and a die gap of 2.0–2.5 mm. If outdoor UV exposure is required, carbon black masterbatch is added at 2.0–2.5 wt%, but masterbatches exposed to >60% relative humidity should be pre-dried at 80°C for 4 h to prevent surface voids. The density of 0.920 g/cm³ provides limited puncture resistance compared with medium-density or high-density PE grades, so liners for sharp aggregate service require validation by puncture testing under ASTM D5748. Direct contact with aromatic hydrocarbons, chlorinated solvents, and strong oxidizing acids is not recommended; chemical resistance for less aggressive service is evaluated under ISO 175:2010. If specific fuel contact is proposed, published data for this specific configuration is limited, and laboratory immersion testing is required before commercial use. Sliding and blocking are adjusted with 0.5–1.0 wt% erucamide slip, but this migrates to the surface and can interfere with printing or sealing, so the addition level should be matched to the converting schedule. End products include construction containment sheet, steel coil overwrap, machinery cover film, and non-hazardous scrap-metal bags.
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Novapol LLDPE FP-020-D is a butene-copolymer linear low-density polyethylene film resin supplied as free-flowing pellets for blown-film and cast-film extrusion. The grade is specified with a nominal density of 0.920 g/cm³ when determined by ASTM D1505 or ISO 1183-1 and a nominal melt mass-flow rate of 2.0 g/10 min when measured at 190 °C under a 2.16 kg load according to ASTM D1238 or ISO 1133-1. These two values position FP-020-D in the general-purpose film segment between easier-processing autoclave LDPE and stiffer, higher-density LLDPE grades. The linear backbone contains short-chain branches from the butene comonomer and lacks the long-chain branching present in high-pressure LDPE. The resulting melt exhibits lower die swell, lower melt elasticity, and a different bubble-stability profile on blown-film lines.
On production-scale monolayer blown-film lines fitted with single-screw extruders of 40–120 mm diameter and 24:1–30:1 L/D, FP-020-D is normally processed through spiral mandrel dies with die gaps in the 1.5–2.5 mm range. A melt temperature window of 190–230 °C is maintained, with the lower bound dictated by melt-fracture risk and the upper bound by oxidative chain scission. Blow-up ratios of 2.0–3.0:1 and frost-line heights of 6–10 die diameters are used to balance machine-direction and transverse-direction properties. Lower frost-line heights increase transverse-direction tear but may reduce bubble stability; higher frost-line heights generally orient the film in the machine direction and lower tear in that axis. These processing settings are consistent with the 0.920 g/cm³ density and 2.0 g/10 min melt-index class rather than specific to one production lot.
Pre-drying is generally unnecessary when pellets are stored at ambient relative humidity below 60%; condensation on cold pellet surfaces should be prevented by minimizing transfer from cold warehouses to heated feed hoppers. The resin is hydrophobic, so moisture-related bubble defects are less common than with polar extrudates, but surface condensation can produce specks and melt-pressure fluctuations.
| Property | Method or condition | Nominal value | Verification basis |
|---|---|---|---|
| Melt mass-flow rate | ASTM D1238 / ISO 1133-1, 190 °C, 2.16 kg | 2.0 g/10 min | Lot certificate of analysis |
| Density | ASTM D1505 / ISO 1183-1, 23 °C | 0.920 g/cm³ | Lot certificate of analysis |
| Comonomer type | FTIR or NMR compositional analysis | Butene | Technical data sheet |
| Additive package | Certificate of analysis | Lot-specific | Supplier certificate |
The primary processing constraint is melt strength. Unlike LDPE, which derives melt strength from long-chain branching, FP-020-D depends on molecular weight, molecular weight distribution, and comonomer distribution. At 190 °C the zero-shear viscosity is lower than that of a 1.0 g/10 min linear resin; therefore, line-speed increases can cause bubble-diameter oscillation if internal bubble pressure is not controlled. Bubble cooling through a single-lip air ring rated for 150–250 m/min linear output is normally sufficient for 25–50 µm films, but published data for this specific configuration is limited.
Melt fracture at the die land can occur when the melt temperature falls below approximately 185–195 °C or when polymer melt enters the die with uneven temperature distribution. Barrel set points of 180–210 °C from feed throat to adapter are used; the final melt temperature is controlled by screw speed and backpressure rather than by the final set point alone. Screw design influences output and gel accumulation. A barrier-flighted, single-stage screw with a Maddock mixing head or equivalent dispersive mixer is used to homogenize the melt. Low-shear general-purpose screws designed for LDPE may deliver melt-temperature heterogeneity. On a 60 mm, 30:1 L/D extruder, a backpressure of 20–35 MPa at 80–120 kg/h is representative; actual values depend on die restriction, screen pack, and melt temperature.
Batch-to-batch shifts in slip or antiblock loading alter film blocking and coefficient of friction. Incoming resin should therefore be tested against ASTM D1894 for kinetic coefficient of friction on 25 µm film and against ASTM D1003 for haze if optical consistency is critical. Lot-level certificates of analysis should list any slip or antiblock masterbatch addition.
General-purpose film applications include heavy-duty liners, agricultural films, carrier bags, and noncritical packaging webs produced at 20–75 µm gauge. Heat-seal response is evaluated using ASTM F2029 or ASTM F88. For a 25 µm film, seal initiation is influenced more by density than by melt index; typical LLDPE of 0.920 g/cm³ density establishes measurable seal strength above 4 N/15 mm at temperatures from 110–130 °C. Dart impact is assessed by ASTM D1709, Elmendorf tear by ASTM D1922, and puncture resistance by ASTM D5748. Published data for this specific configuration is limited, and final film properties must be verified on the target line.
Against autoclave LDPE of similar melt index, FP-020-D exhibits higher tensile stress at yield and higher Elmendorf tear in both machine and transverse directions because of its higher molecular weight and absence of long-chain branching. LDPE, however, retains lower haze, lower seal initiation temperature, and higher melt strength. A processor replacing LDPE with FP-020-D typically requires narrower die gaps and more attentive frost-line control to maintain bubble stability.
Against a 0.935 g/cm³ HDPE or high-density LLDPE, FP-020-D provides lower modulus and higher dart impact but higher gas transmission and lower top-load rigidity. Oxygen transmission can be compared by ASTM D3985 and water vapor transmission by ASTM F1249; thickness-normalized values should be compared at equivalent gauge and film-processing orientation.
Against octene-based LLDPE of equal density and melt index, FP-020-D typically falls below in dart impact and tear resistance, particularly at 25 µm gauge, due to fewer effective tie molecules and less efficient short-chain branching. Hexene or octene grades are often selected for frozen-food packaging and tough liner applications, while butene grades are used in cost-driven general-use films. Compared with metallocene LLDPE, FP-020-D has a broader molecular weight distribution, which reduces melt pressure and permits similar output at lower torque; metallocene grades typically provide lower extractables and better organoleptic performance.
Regulatory conformance for olefin homopolymers and copolymers may fall under FDA 21 CFR 177.1520 for food-contact applications, provided the final film complies with the applicable migration limits and end-use conditions. REACH Regulation (EC) No 1907/2006 conformance is established for the base polymer; RoHS compliance for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE is typically documented to concentrations below 0.1% by weight in homogeneous material, with cadmium below 0.01% by weight. No statement of conformity should be inferred without the supplier’s current certificate.
| Regulation or standard | Scope | Condition or threshold |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers used in food-contact articles | Final film must meet migration limits and end-use conditions |
| REACH Regulation (EC) No 1907/2006 | Substance registration and SVHC communication | No SVHC above 0.1% w/w declared for base resin |
| RoHS Directive 2011/65/EU | Restriction of hazardous substances in EEE | Pb, Hg, Cr(VI), PBB, PBDE below 0.1% w/w; Cd below 0.01% w/w |
Microstructural characterization of a 0.920 g/cm³ butene-LLDPE reveals a crystallinity of approximately 35–45% by differential scanning calorimetry when measured by ASTM D3418 at a 10 °C/min heating rate. The peak melting temperature is expected in the 120–125 °C range. Butene branches disrupt lamellar thickening and produce a lower melting peak than a 0.960 g/cm³ HDPE. These structural characteristics are not unique to FP-020-D but are determined by comonomer type and density.
When coextruding FP-020-D as a core or skin layer with LDPE seal layers or HDPE moisture-barrier layers, interfacial instability may occur if melt viscosities differ by more than about 2:1 at the die. A 2.0 g/10 min LLDPE often pairs with a 0.8–1.0 g/10 min LDPE or a 0.9–1.5 g/10 min HDPE. Screw feedblock temperature set points should be adjusted to maintain a viscosity ratio in the die below 2:1. Non-polar polyolefin tie layers are required when combining FP-020-D with polyamide or EVOH barrier layers, because direct adhesion is insufficient.
On cast-film lines, the resin is extruded through flat dies with 0.5–1.0 mm die gaps at melt temperatures of 200–240 °C and chill-roll temperatures of 15–30 °C. At these conditions, the 2.0 g/10 min melt index supports line speeds above 200 m/min on 1.5 m wide lines, but edge-lift and neck-in are controlled by die-to-nip distance and air-knife angle. Published data for this specific configuration is limited.
