| HS Code | 713085 |
| Density | 922 kg/m³ |
| Melt Flow Rate 190 C 2 16 Kg | 2.0 g/10 min |
| Melting Temperature | 110 °C |
| Vicat Softening Temperature A | 90 °C |
| Tensile Strength At Yield | 10 MPa |
| Tensile Strength At Break | 15 MPa |
| Elongation At Break | 500 % |
| Tensile Modulus | 250 MPa |
| Hardness Shore D | 50 |
| Brittleness Temperature | -70 °C |
| Volume Resistivity | >1×10^16 Ω·cm |
| Dielectric Constant 50 Hz | 2.3 |
| Dissipation Factor 50 Hz | 0.0002 |
| Dielectric Strength | 20 kV/mm |
As an accredited Borealis LDPE NAV103 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Borealis LDPE NAV103 is supplied in 25 kg polyethylene bags, palletized at 1,000 kg per pallet and shrink-wrapped. |
| Container Loading (20′ FCL) | Borealis LDPE NAV103 is loaded into a 20-foot FCL container, typically palletized 25 kg bags, secured for dry ocean transport. |
| Shipping | Borealis LDPE NAV103 is shipped as non-regulated polyethylene resin pellets in 25 kg bags, big bags, or octabins. Standard road, rail, or sea freight applies. Keep dry, cool, and protected from direct sunlight and excessive heat. No special dangerous goods documentation is normally required. |
| Storage | Store Borealis LDPE NAV103 in a cool, dry, well-ventilated area. Keep in original, closed packaging on pallets, away from direct sunlight, moisture, heat, ignition sources, and oxidizing agents. Avoid prolonged high temperatures and UV exposure. Maintain clean, dry floors to prevent slips from pellets. Do not store outdoors or near open flames. Follow the supplier’s SDS and local regulations. |
| Shelf Life | Borealis LDPE NAV103 typically has a 12-month shelf life when stored dry in unopened original packaging, away from direct sunlight. |
On tandem extrusion coating lines feeding board webs at 250–350 m/min, Borealis LDPE NAV103 is processed with a die exit temperature of 300–330 °C and used as the outer heat-seal layer at 18–25 g/m². Material certification for the grade defines a melt flow rate of 4.5 g/10 min under ISO 1133-1 at 190 °C/2.16 kg and a density of 0.918 g/cm³ under ISO 1183-1. The layer is run at 100 wt% NAV103 unless a white outer surface is specified, in which case a titanium dioxide LDPE masterbatch is dosed at 6–10 wt% through the feed-throat gravimetric system. Barrels are set from 180 °C to 325 °C; the air gap is maintained at 150–250 mm to oxidise the melt surface and promote adhesion to board. Chill roll temperature is set at 10–20 °C, with gloss or matte surfaces selected according to the downstream heat-seal jaw profile. Neck-in exceeding 8% of die width indicates excessive melt temperature or insufficient edge cooling and is corrected by die gap and deckle adjustment. The total polyethylene content in an aseptic brick structure can reach 30–45 g/m². Compliance relevant to this use includes FDA 21 CFR 177.1520, EU Regulation 10/2011, and migration testing under EN 1186-1; overall migration must not exceed 10 mg/dm². Terminal product forms are brick-type aseptic cartons, gable-top cartons, and portion packs for UHT milk, juice, and liquid dairy alternatives.
Aluminium foil-based barrier structures for dry food sachets and stick packs use 6.3–9 µm foil conforming to EN 546-2; the foil is extrusion-laminated between 12 µm polyester and a 15–25 µm NAV103 sealant layer. The NAV103 layer is processed at 100 wt%. Die exit temperature is set at 305–325 °C, and the air gap is limited to 200–250 mm; melt-surface oxidation before the nip determines peel strength to the foil. On production lines with inconsistent aluminium adhesion, ozone injection at 2–4 g/h per die metre is applied to raise surface energy. Nip pressure at the laminating unit is 4–8 N/mm², using a rubber-covered backup roll of 70–85 Shore A hardness. Slip masterbatch addition, if needed for form-fill-seal machinability, is limited to 1–3 wt% and must be food-approved; anti-block particulates are avoided because they create pinholes and reduce seal integrity. Food-contact compliance is under EU Regulation 10/2011 and FDA 21 CFR 177.1520; the foil substrate is covered by EN 573-3 for alloy composition. Terminal products include dry soup sachets, powdered beverage stick packs, coffee overwrap, and non-retort pharmaceutical supplement stick packs. Published data for this specific foil/NAV103 construction is limited; seal strength is determined on-line by ASTM F88 over a jaw temperature range of 110–140 °C.
When cupstock coat weights fall below 22 g/m² on clay-coated solid bleached sulfate board, pinhole defects appear if board moisture exceeds 7%. On lines running NAV103, the board is preheated to 90–110 °C before the laminating nip and flame- or corona-treated on the clay side to 38–42 mN/m as measured by DIN ISO 8296 or ASTM D2578. The resin is extruded as a monolayer at 20–30 µm; die exit temperature is 310–325 °C, and the air gap is shortened to 120–180 mm to reduce melt cooling before board contact. The food-contact side is 100 wt% NAV103. If a double-sided coated board is run, the reverse-side coating may be a 15–20 wt% blend of higher-melt-flow LDPE in NAV103 to reduce deckle adjustment during width changes, but the food-contact side remains 100 wt% NAV103. Adhesion to clay-coated board is evaluated under TAPPI T540, with a minimum target of 1.5 N/15 mm and fibre tear as the preferred failure mode. Compliance includes FDA 21 CFR 176.170, EU Regulation 10/2011, and BfR Recommendation XXXVI. Terminal products are hot and cold beverage cups, soup cups, food pails, and popcorn cartons.
In flexible packaging lines that join surface-printed OPET and BOPP webs to LDPE NAV103 sealant films for dry food pillow packs and personal-care overwrap, the resin is applied at 12–20 µm coat weight with a die exit temperature of 300–320 °C. The primary web is 12–20 µm BOPP or OPET; the secondary web is 20–40 µm PE film. Before the nip, the secondary web is corona-treated to 42–46 mN/m as tested by ASTM D2578; the primary web may be chemically primed with a PE-based adhesion promoter at 0.1–0.3 g/m² dry coat weight. Formulation is 100 wt% NAV103; slip or anti-block masterbatch addition, if required for high-speed pouching, is limited to 1–3 wt% and adjusted to maintain kinetic coefficient of friction below 0.30 as measured by ISO 8295. The line runs at 150–350 m/min with chill roll temperature 15–25 °C and nip pressure 4–6 N/mm². Food-contact compliance is under EU Regulation 10/2011 and FDA 21 CFR 177.1520. Terminal products include snack pouches, dry pet food liners, moist wipe overwrap, and freezer bag laminates. Published data for seal initiation temperature of this exact NAV103 coating in BOPP/OPET structures is limited; converters determine it by ASTM F88 seal strength curves at 110–140 °C jaw temperatures.
Release liner base stock produced with NAV103 on supercalendered kraft of 60–80 g/m² uses a coating weight of 15–25 g/m². The resin is applied at 100 wt%; slip additives are excluded because migratory amide waxes reduce silicone anchorage. After chilling, the coated surface is corona-treated to 40–44 mN/m according to ASTM D2578 before silicone application. Solventless platinum-catalysed silicone systems are applied at 0.8–1.5 g/m² on offline coaters running at 200–400 m/min. Anchorage is verified by rub-off and loop tack tests; if anchorage fails, the oxidation level at the die, corona treatment, and paper moisture are adjusted before formulation changes. Compliance for release liner intended for incidental contact with dry foods is assessed under EU Regulation 10/2011 and FDA 21 CFR 177.1520; the paper component may fall under FDA 21 CFR 176.170. Terminal products include release liners for pressure-sensitive labels, graphics films, and hygiene adhesive tapes. Published data for this specific configuration is limited.
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Borealis LDPE NAV103 is supplied as a low-density polyethylene resin produced by high-pressure polymerisation. The grade carries a published density of 923 kg/m³ determined under ISO 1183-1:2019 and a melt flow rate of 20 g/10 min at 190 °C/2.16 kg determined under ISO 1133-1:2022. This melt flow rate places NAV103 in the high-flow LDPE segment, distinct from blown-film and extrusion-coating LDPE types that commonly operate below 10 g/10 min. The resin is supplied as spherical pellets with an antioxidant stabilisation package, and lot-level certificates of analysis govern the actual release values. The high-pressure branched architecture yields a density below 0.930 g/cm³, which influences flexibility, permeability, and low-temperature impact response in thin-walled moulded parts.
The high-pressure polymerisation route produces long-chain branching rather than the predominantly short-chain branching of linear low-density polyethylene. Under ISO 11443:2021 capillary rheometry, a high-MFR LDPE of this class typically shows a power-law index near 0.35–0.45, whereas many LLDPE grades exceed 0.50. The resulting shear-thinning behaviour reduces viscosity at injection shear rates above 1,000 s⁻¹, but also reduces melt strength in processes that rely on extensional strain. For NAV103, annular film extrusion on dies with blow-up ratios above 2.0:1 is therefore not the preferred conversion route unless bubble stability is restored by blending with a lower-MFR LDPE.
Injection moulding is the primary route where the grade’s high melt flow rate reduces injection pressure and improves cavity filling in multi-cavity tools. On a hydraulic injection moulding machine with a clamp force of 100–150 t and a general-purpose screw of 20:1–25:1 L/D, the recommended melt temperature range is 180–220 °C, with the rear zone maintained 30 °C below the nozzle temperature to prevent pellet bridging in the feed throat. The mould surface temperature can be set between 20 °C and 50 °C; lower settings reduce cycle time, while higher settings improve flow-line visibility in thin ribs. Because NAV103 is a high-flow LDPE, screw back pressure can be kept at 5–10 bar; values above 15 bar increase shear heating and may consume the antioxidant package. Extrusion is limited to profile and small-tube applications where melt strength is not the controlling factor.
For thin-wall closures and overcaps with nominal wall thickness below 1.0 mm, the pressure drop across a cold runner can exceed 800 bar when the melt temperature is below 190 °C. A hot runner system with externally heated manifolds and valve gates reduces the required injection pressure and improves gate freeze-off control, but the manifold temperature should not exceed 230 °C to avoid gel formation. Mould filling simulation using the grade’s measured shear-viscosity curve is required for gate placement because high-flow LDPE can exhibit jetting in long, unconstrained flow paths; a short-to-land gate or a valve-gated drop reduces visible weld lines. Cycle time is primarily limited by cooling of the thickest section, not by the material’s melt temperature. Published data for the exact NAV103 formulation are limited concerning mould linear shrinkage; toolmakers should derive shrinkage from a prototype cavity rather than from generic LDPE tables.
Tensile testing under ISO 527-2:2012 typically yields a yield stress of 10–12 MPa, elongation at break above 200 %, and a tensile modulus below 300 MPa for high-flow LDPE of this density. Flexural modulus measured according to ISO 178:2019 is expected near 200–250 MPa, while Vicat softening temperature under ISO 306:2022 method A50 is expected near 88–92 °C. These values differentiate NAV103 from medium-density and high-density polyethylene grades, which provide higher stiffness and heat resistance but lower ductility. The low density also reduces environmental stress crack resistance compared with HDPE in the presence of polar process oils or detergents; ESCR testing according to ASTM D1693-21 should be performed on the final part if stress-cracking fluids are present. Impact response in thin sections remains ductile because of low crystallinity and long-chain branching, but published NAV103-specific notched Charpy values under ISO 179-1:2023 are limited and should be confirmed on production samples.
In masterbatch compounding and additive concentrate production, NAV103 can operate as a carrier resin because its melt flow rate allows lower motor load and faster wetting of pigments and mineral fillers. On a co-rotating twin-screw extruder with 44:1 L/D, the melt temperature should remain below 230 °C; local shear rates in kneading blocks above 500 s⁻¹ may create melt-temperature overshoot that generates gel particles and reduces filter life. When loading calcium carbonate or talc above 20 wt%, side feeding and atmospheric venting are recommended; otherwise the process can shift from melt-phase dispersion to feed limitation. Compared with a lower-MFR LDPE carrier, NAV103 supports higher filler loading and lower compounding torque, but the resulting compound has reduced melt strength and may require blending with a stiffer grade for film or sheet thermoforming. The exact dispersion threshold for NAV103 with high-aspect-ratio fillers is not published and must be established on production-scale compounding equipment.
Compliance cannot be confirmed from the base polymer alone; the final article’s additive package, colourants, and processing aids determine end-use status. For food-contact applications in the United States, LDPE resins may be evaluated under FDA 21 CFR 177.1520, but migration testing under specific food simulants is an end-use responsibility. In the European Union, plastic food-contact materials must comply with EU Regulation 10/2011, including the overall migration limit of 10 mg/dm² and specific migration limits for additives. RoHS compliance under 2011/65/EU plus EU 2015/863 may be demonstrated by supplier declaration for cadmium, lead, mercury, hexavalent chromium, PBB, and PBDE; polyolefin matrices are typically not sources of these substances. REACH obligations under 1907/2006 require substance registration and SVHC communication when applicable. The following matrix summarises the assessment boundaries.
| Reference | Scope | Assessment boundary |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers in food contact | Final additive package and migration testing required |
| EU 10/2011 | Plastic food-contact materials | Overall migration 10 mg/dm²; end-use article testing required |
| RoHS 2011/65/EU + 2015/863 | Electrical and electronic equipment | Supplier declaration; restricted substances below 0.1 wt% in homogeneous material |
| REACH 1907/2006 | Chemical safety | Substance registration and SVHC communication |
Because the high-pressure LDPE backbone contains long-chain branches, weld-line strength and ultrasonic welding behaviour differ from linear polyethylene. Welding of NAV103 mouldings should use lower energy input than HDPE; excessive energy produces squeeze-out and carbonised residue at the weld plane. In closure liners or overcaps for oxygen-sensitive products, the base resin’s permeability is too high for barrier function; oxygen transmission must be reduced by foil liners, barrier coatings, or multi-layer structures. Oxygen permeation testing under ISO 15105-2:2023 or ASTM D3985-24 and carbon dioxide testing under ASTM D1434-23 should be performed on the actual part thickness, because crystallinity and wall thickness control permeation. Published data for the exact NAV103 formulation are limited for gas transmission; converters should not rely on generic LDPE permeability tables for critical packaging specifications.
At melt temperatures above 230 °C, high-pressure LDPE can undergo oxidative degradation that increases the yellowness index and reduces the concentration of the antioxidant package. In injection moulding, residence time in the barrel should not exceed 15 min when the melt temperature is above 200 °C; longer hold-up times can create carbonyl species that shift the colour and odour profile. On a single-screw extruder, processing at 180–220 °C with a temperature profile rising from 160 °C in the feed zone to 210 °C at the die limits degradation while maintaining output. If the melt temperature exceeds 220 °C, screw speed should be reduced or back pressure lowered to limit viscous heating. Failed batches are typically identified by black specks, gels, or acrid odour; these defects cannot be corrected by increasing mould temperature and require purging with a high-viscosity purging compound.
Published data for the exact NAV103 formulation are limited concerning weathering and ultraviolet stability; the base resin does not contain a UV stabiliser package unless specifically ordered. Outdoor exposure without carbon black or a hindered amine stabiliser results in surface chalking and loss of elongation after prolonged solar irradiation. For UV-stable articles, a stabilised precompound or masterbatch should be validated by accelerated weathering under ISO 4892-2:2013 or ASTM G155-21, with retention of tensile elongation as the acceptance criterion. Chemical resistance testing under ISO 175:2010 is required for sealing applications involving alcohols, surfactants, or process oils, because the low crystallinity of LDPE produces higher diffusion of nonpolar solvents than HDPE.
Borealis supplies several LDPE grades with different melt flow rates; the NAV103 designation identifies a high-flow grade intended for low-pressure filling and thin-wall parts. Lower-flow injection grades with MFR below 10 g/10 min give higher melt strength and better environmental stress crack resistance but require higher injection pressure and may not fill long flow paths in multi-cavity tools. Higher-flow LDPE grades can reduce pressure further but lower molecular weight, sacrificing tensile strength and increasing the risk of gate stringing. The NAV103 balance of 20 g/10 min MFR and 923 kg/m³ density places it in the upper region of injection-moulding LDPE flow, not in the film extrusion range. The additive package may also differ from other grades: some film grades contain slip and antiblock agents that create surface bloom and impair sealing; NAV103 is supplied with a stabilisation package suitable for injection moulding, but the exact additive recipe must be confirmed against the current datasheet.
Regrind re-use of NAV103 in injection moulding is common up to 20 wt% when the regrind is clean and generated from the same production lot. Higher regrind fractions reduce the stabiliser concentration and increase the gel count; converters must validate the maximum acceptable fraction by monitoring melt flow rate shift and black specks. Contamination with PP or HDPE should be avoided because immiscible domains create visible flow lines and reduce impact performance; even 2–5 wt% PP can degrade product consistency. If a machine has processed a higher-viscosity resin, a purging compound should be run until the melt pressure stabilises, then the NAV103 feedstock introduced. Drying is not required when storage remains below 40 °C and relative humidity below 60 %; if moisture contact occurs, pre-drying at 60–70 °C for 1–2 h in a desiccant dryer prevents surface splay.
