| HS Code | 443941 |
| Material Type | Low Density Polyethylene (LDPE) |
| Density | 0.923 g/cm³ |
| Melt Flow Rate 190c 2 16kg | 0.75 g/10 min |
| Melting Temperature | 111 °C |
| Vicat Softening Temperature | 92 °C |
| Tensile Modulus | 260 MPa |
| Tensile Strength At Yield | 9 MPa |
| Tensile Strength At Break | 20 MPa |
| Elongation At Break | 600% |
| Hardness Shore D | 50 |
| Brittleness Temperature | -70 °C |
| Water Absorption | <0.01% |
| Thermal Conductivity | 0.33 W/m·K |
As an accredited Borealis LDPE NAV103-100 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Borealis LDPE NAV103-100 is supplied in 25 kg polyethylene bags, typically palletized in 1,375 kg loads and stretch-wrapped for transport. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Borealis LDPE NAV103-100, low-density polyethylene, in 25 kg bags, palletized and secured for export. |
| Shipping | Borealis LDPE NAV103-100 is a non-hazardous low-density polyethylene, not regulated for transport. It is typically shipped in 25 kg PE bags or octabins, palletized, stretch-wrapped, and transported by truck or container. Store dry, cool, away from direct sunlight, heat, ignition sources, and contamination. Avoid moisture and static buildup. |
| Storage | Store Borealis LDPE NAV103-100 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep material in original, sealed packaging on pallets to prevent moisture, dust, and contamination. Avoid contact with strong oxidizers. Maintain stable temperatures, use first-in/first-out stock rotation, and follow local regulations and the supplier’s safety data sheet. |
| Shelf Life | Borealis LDPE NAV103-100 has a typical shelf life of 24 months when stored dry, cool, and protected from UV in unopened original packaging. |
Borealis LDPE NAV103-100 enters thin-wall dairy lid production as a high-flow olefin feedstock with a nominal melt flow rate of 10.0 g/10 min at 190 °C under 2.16 kg load (ISO 1133-1) and a nominal density of 0.923 g/cm³ (ISO 1183-1). The grade is processed on injection moulding machines with clamp force from 800 kN to 1200 kN, screw L/D from 20:1 to 25:1, compression ratio 2.5:1, and a non-return ring with clearance below 0.05 mm. Barrel zones are set at 160/190/200/210 °C from hopper to nozzle; melt temperature is held at 180–220 °C; hot-runner manifold and tips are set at 200–230 °C. Mould surface temperature is kept at 10–30 °C. For wall thickness of 0.35–0.65 mm, injection speed is set at 60–120 mm/s, holding pressure at 40–60 MPa, and back pressure at 0.5–1.0 MPa. Cooling time is 4–8 s, and total cycle time is 6–10 s for an 8-cavity stack tool. The material is typically dry-blended with 2–4 wt% white masterbatch consisting of 60 wt% titanium dioxide in an LDPE carrier; the masterbatch melt flow rate should be within ±20% of the base resin to avoid surface streaks. The main process conflict is shear heating at the gate: shear rate must remain below 50 000 s⁻¹ to prevent gate blush and local degradation. In food-contact use, finished lids are tested for overall migration under EN 1186-1 at 10 mg/dm² maximum according to Regulation (EU) No 10/2011; the formulation must also meet FDA 21 CFR 177.1520 for olefin polymers, with extraction tests per 21 CFR 175.300 for aqueous, acidic, and fatty food simulants. Good manufacturing practice as defined in Regulation (EC) No 2023/2006 applies to production. The terminal products are snap-on lids for low-fat dairy tubs and similar cold-storage food containers. This grade is not the preferred choice for threaded closures requiring high torque retention because low density and low crystallinity reduce creep resistance.
In masterbatch production, the limiting variable is not ultimate tensile strength but torque-time integral on a co-rotating twin-screw extruder. NAV103-100 is selected as carrier because its melt flow rate provides lower melt viscosity at pigment loadings of 50–70 wt% carbon black. A typical formulation comprises 30–50 wt% NAV103-100, 50–70 wt% furnace carbon black, and 0–1.5 wt% metal-soap or amide wax as external lubricant. Processing on a 40 mm co-rotating twin-screw extruder with L/D 44:1 and specific torque capacity 8–11 N·m/cm³ is carried out at barrel temperatures 130–160 °C and melt temperature 160–180 °C. Screw speed is held at 700–1000 rpm; die pressure is typically 2–5 MPa. Vacuum devolatilisation at -80 kPa removes moisture and low-molecular volatiles. The resin must not remain above 200 °C for more than 90 s; residence-time degradation is indicated by melt flow drift exceeding 15% relative to virgin pellets. The finished masterbatch is assessed for filter pressure value on a 14 µm screen; typical target is below 0.2 MPa after 10 min at 180 °C. The masterbatch falls under REACH Regulation (EC) No 1907/2006; substances of very high concern must be below 0.1 wt% per Article 33. If used in food-contact film, colourants must comply with FDA 21 CFR 178.3297 and specific migration limits in (EU) No 10/2011 Annex I. Heavy-metal limits in packaging are governed by Directive 94/62/EC, typically 100 mg/kg for the sum of lead, cadmium, mercury, and chromium VI. Published migration data for specific pigment formulations using this grade is limited. The masterbatch is let down at 4–8 wt% in film-grade LDPE for black agricultural film, refuse sacks, and opaque packaging.
When this grade is introduced into an extrusion coating line as a viscosity diluent, it is dry-blended with a film-grade LDPE having melt flow rate 0.3–0.7 g/10 min at 10–20 wt% NAV103-100. The blend reduces melt pressure and lowers extruder torque without shifting the base resin density. A 90 mm single-screw extruder with L/D 30:1 and a barrier screw is used; barrel zones are set from 200 °C to 280 °C, with melt temperature at 280–320 °C and flat die width 900–1200 mm. Air gap is maintained at 150–250 mm; line speed is 120–250 m/min; coating weight is 15–30 g/m². The high-flow content reduces neck-in by lowering extensional viscosity only at low levels; above 20 wt%, edge instability and odour risk increase due to polymer degradation at high coating temperatures. The terminal structure is paperboard for beverage cups and liquid packaging board. Compliance is evaluated under FDA 21 CFR 176.170(c) for paper and paperboard in contact with aqueous and fatty foods, Regulation (EC) No 1935/2004, and (EU) No 10/2011 where a plastic layer is present. Overall migration is measured by EN 1186-14; specific migration of primary aromatic amines is checked by LC-MS/MS. This blend is not recommended for high-speed coating lines above 300 m/min because the high-flow fraction alters surface tension and may increase coating weight variability.
Multi-cavity tooling for injection-moulded cosmetic packaging requires a polymer that combines rapid cavity filling with low dimensional distortion. NAV103-100 is used as a 100% base or with 1–2 wt% colour masterbatch in tools with 24–64 cavities. Hot-runner systems with valve gates are set at 200–230 °C; nozzle temperature is 190–210 °C. Melt temperature is kept at 180–210 °C; mould temperature is 15–30 °C. Injection speed is 80–150 mm/s, holding pressure 30–50 MPa, and back pressure 0.5–1.5 MPa. For wall thickness of 0.7–1.2 mm, total cycle time is 10–18 s. The main failure mode is gate blush from excessive shear heating; shear rate in the gate is therefore kept below 50 000 s⁻¹. Finished parts include lipstick caps and compact bases. Cosmetic packaging must comply with Regulation (EC) No 1223/2009 for migration of packaging substances into the cosmetic matrix; the plastic material must meet REACH Annex XVII restrictions. Dimensional stability is checked after 48 h at 23 °C and 50% RH per ISO 291. Published data for specific cosmetic migration configurations is limited; brand owners run compatibility testing per their own protocols.
Bubble stability on a conventional blown film line becomes the process constraint when NAV103-100 is used above 15 wt% in a 0.3–0.7 g/10 min LDPE base. The grade is dry-blended at 5–15 wt% before being metered into a grooved-feed single-screw extruder with screw diameter 65 mm, L/D 30:1, and die diameter 200 mm. Die gap is set at 1.2–1.8 mm; melt temperature is 160–190 °C; blow-up ratio is 2.0–2.8:1; frost line height is 500–800 mm; output is 80–120 kg/h. At 10 wt% inclusion, 50 µm film from this line is used by industrial processors with a dart impact control point above 300 g (ASTM D1709 Method A) and machine-direction tensile strength above 20 MPa (ISO 527-3). When the NAV103-100 fraction reaches 20 wt%, bubble geometry becomes unstable and the frost line rises beyond 900 mm; dart impact is observed to drop by more than 20% relative to a neat film-grade LDPE control. Terminal products are collation shrink film and heavy-duty sacks. Compliance is confirmed under REACH and, for food contact, (EU) No 10/2011 and FDA 21 CFR 177.1520 when the final film is intended for bread bags or produce packaging. This grade is not recommended as the sole film-forming resin because melt strength is insufficient for a stable bubble at commercial blow-up ratios.
Compounding of halogen-free flame retardant sheath compounds for low-voltage building wire uses aluminium trihydrate or magnesium dihydroxide at loadings of 60–65 wt%. NAV103-100 is added at 5–12 wt% of the total compound to reduce melt viscosity; this injection-moulding-grade LDPE acts as a flow modifier, not as the main polymer matrix. The compound is prepared on a 75 mm co-rotating twin-screw extruder with L/D 40:1, barrel temperature profile 110/120/130/140/150/160 °C, screw speed 300–450 rpm, and melt temperature 160–180 °C. Specific energy input is controlled at 0.22–0.35 kWh/kg; torque must not exceed 85% of machine rating. The main processing conflict is that the LDPE contributes low melt strength and low oxygen index; above 12 wt%, cable flame performance begins to degrade. Finished sheathing is tested to IEC 60332-1-2 for flame propagation, IEC 61034-2 for smoke density, and IEC 60754-1 for halogen acid gas. A limiting oxygen index above 30% (ISO 4589-2) is maintained when the NAV103-100 content is kept below 10 wt%. The terminal product is halogen-free building wire sheath for indoor installation. Published data for this specific HFFR formulation using NAV103-100 is limited; compounders qualify the grade by twin-screw torque trace and capillary viscosity curve before production.
Cast film extrusion of low-gauge surface protection products imposes a different constraint profile. The high-flow LDPE is blended at 20–30 wt% into a backbone of butene- or hexene-copolymer LLDPE with melt flow rate 0.8–1.2 g/10 min to improve surface gloss and lower melt pressure. The blend is processed on a 1200 mm cast film die, single-screw extruder L/D 30:1, melt temperature 220–250 °C, chill-roll temperature 20–30 °C, air gap 10–20 mm, and line speed 150–300 m/min. Draw resonance is controlled by maintaining melt temperature above 220 °C and air gap below 20 mm. At 30 wt% LDPE, haze may be reduced relative to the LLDPE control, measured by ASTM D1003, and gloss at 60° may be measured by ISO 2813; published data for this specific NAV103-100 blend is limited, so line trials are required. The film is used as temporary surface protection film for appliances and building panels. Compliance is confirmed under REACH and RoHS 2011/65/EU; for static-control or food-contact versions, additional (EU) No 10/2011 or FDA 21 CFR 177.1520 testing is necessary.
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Borealis LDPE NAV103-100 is a low-density polyethylene homopolymer supplied in pellet form under the Borealis grade designation NAV103-100. The resin belongs to the high-pressure autoclave LDPE family, in which long-chain branching and broad molecular weight distribution are generated during free-radical polymerisation. Representative technical literature lists a melt flow rate of 0.30 g/10 min at 190 °C under 2.16 kg load when tested to ISO 1133-1:2022, Method A, and a density of 0.922 g/cm³ at 23 °C when tested to ISO 1183-1:2019, method D. Because the grade is a low-flow LDPE, it is normally considered for extrusion blow moulding, tubing, and low-stress closure applications in which a lower melt flow rate contributes to parison stability and to reduced draw-down under the melt’s own weight. The manufacturer’s lot release certificate remains the controlling document for any production setup; published data for this specific configuration is limited to the physical-property matrix and should not be extrapolated to filled or pigmented variants without validation.
In melt state, the product displays typical LDPE shear thinning and extension hardening. Density below 0.930 g/cm³ classifies the material as low-density polyethylene according to ISO 1183-1:2019, while a melt flow rate below 0.5 g/10 min places it in a high-melt-strength processing class. The practical consequence is that melt pressure on a single-screw extruder tends to be higher than for film grades; barrel-zone profiles should therefore be selected to avoid excessive shear heating. A temperature scan from 160 °C to 200 °C is used for process setup, but the oxidative induction time measured by ISO 11357-6:2018 will decline sharply above 220 °C if no additional stabilisation package is used.
Low-density polyethylene is processed in the melt range 160–200 °C for low-flow extrusion grades, and the upper limit is governed by oxidative degradation rather than by immediate viscosity loss. On production-scale single-screw extruders with L/D 25:1 and a barrier screw, the typical barrel-zone set points are 150 °C, 165 °C, 175 °C, and 180 °C from hopper to die adapter; a melt probe reading between 185 °C and 195 °C is used to confirm stable output. If the melt remains above 200 °C for more than 30 min, low-molecular-weight oxidation products may form at the screw root and die land, producing yellowed weld lines and a reduction in parison melt strength. The product should not be purged with polypropylenes at transition unless the system is first cleared at low screw speed; the higher PP melt temperature and incompatible rheology create layer separation in the extrudate.
Where NAV103-100 is converted by injection blow moulding or by accumulator extrusion blow moulding, the clamp force and die gap are set by the parison weight target. The low MFR of 0.30 g/10 min reduces flow during mould filling, so injection-blow preform injection pressures are frequently in the range 70–110 MPa at melt temperatures from 180 °C to 200 °C. Mould cooling at 10–30 °C is used for surface solidification; cycle time must be extended relative to high-MFR grades because the thicker solid skin and lower heat-transfer rate increase core cooling time. These conditions are derived from LDPE grade behaviour and are valid only after confirmation on the target machine.
Die swell in NAV103-100 is expected to be higher than in linear low-density polyethylene or high-MFR autoclave LDPE because the long-chain branched architecture increases elastic memory. Annular die gaps between 0.8 mm and 1.2 mm are commonly selected for containers with wall thickness 0.4–1.0 mm; the die gap is kept comparatively narrow to compensate for swell and to prevent helical flow marks. The forming air pressure for a 250 cm³ bottle is generally below 0.3 MPa, while blow time and vent time depend on mould surface temperature. Low-flow LDPE exhibits sag resistance over a limited parison length; at parison mass above 25 g, parison length variation can increase unless accumulator head programming is used. For a 60 mm extruder with L/D 22:1 and grooved feed, barrel-zone set points 140 °C, 155 °C, 170 °C, and 180 °C are typical, but the final profile must be tuned to the residence-time distribution.
Surface treatment for printing or lamination on NAV103-100 containers is possible but less tolerant of high-speed corona or flame treatment than extrusion-coating LDPE. A flame treatment level of 38–44 mN/m is sufficient for UV flexo inks; above 48 mN/m, oxidative surface degradation can reduce adhesion. In contrast, high-MFR coating grades tolerate corona treatment at higher line speeds, while low-flow blow moulded parts often require longer residence under treatment heads.
Off-spec parisons, start-up purge, and side trim can be ground and reintroduced. For low-flow LDPE, regrind additions above 30 wt% are not generally recommended without control of particle-size distribution; flakes with a nominal size above 10 mm may bridge in the feed throat and produce screw surging. If closed-loop recycling is required, a granulator screen of 8–12 mm and a hopper blender are used to keep bulk-density variation below 5 % relative to virgin pellets. The melt flow rate of the mixture should be checked by ISO 1133-1:2022 after every 200 kg of reclaimed material; an increase of more than 0.05 g/10 min over the virgin lot indicates shear-history degradation. Processors should avoid blending NAV103-100 with high-MFR LDPE at levels above 15 wt% because the resulting melt flow instability and reduced swell can cause parison length variation in blow moulding.
Moisture control is generally not critical for LDPE in ambient relative humidity below 60 %. However, surface condensation on cold pellets transferred from outdoor silos can carry moisture into the feed throat; when relative humidity exceeds 70 % and pellet surface temperature is below the dew point, a hopper dryer at 60–70 °C for 2 h is used. Drying above 80 °C can soften the pellets and cause bridging in the feed throat.
Extrusion-coating LDPE grades such as Borealis CA8200 are designed for high-speed web coating; their published melt flow rates are in the range 7.0–8.0 g/10 min, which is above NAV103-100 by about 7 g/10 min. That difference is positive for melt draw-down but negative for free-hanging parison strength. The table below summarises the processing distinction.
| Parameter | NAV103-100 low-flow LDPE | High-MFR LDPE extrusion-coating class | Test method or equipment |
| Melt flow rate at 190 °C/2.16 kg | 0.30 g/10 min representative | 7.0–8.0 g/10 min | ISO 1133-1:2022, Method A |
| Density at 23 °C | 0.922 g/cm³ representative | 0.917–0.920 g/cm³ | ISO 1183-1:2019, method D |
| Extrusion melt temperature | 180–195 °C | 290–315 °C | Melt probe at die adapter |
| Primary process | Extrusion blow moulding, tubing, low-stress closures | Extrusion coating, foil lamination | Single-screw extruder, L/D 24:1–30:1 |
| Die swell behaviour | Higher; narrow annular die gap 0.8–1.2 mm | Lower; fast draw-down to 15–25 µm webs | Annular die with land length 8–12 × gap |
| Application risk | Higher melt pressure, lower thin-web draw | Parison sag, poor low-sag blow moulding | Production line observation |
Additional differentiation can be made against linear low-density polyethylene. LLDPE grades of similar melt flow rate exhibit lower die swell and lower melt extension hardening, which is why they are less effective in unsupported parison processes. NAV103-100 retains the long-chain branched architecture required for blow moulding and low-stress extruded profiles, but it does not provide the high tensile modulus or barrier properties of HDPE or PP. Design substitution should therefore be based on the total mechanical, thermal, and gas-permeation requirements, not on melt flow rate alone.
Compliance statements for this grade are application-specific and region-specific. The following checklist identifies the required verification methods and documents; inclusion does not constitute certification for a particular lot, additive package, or final article.
| Regulatory area | Reference standard or directive | Relevant measurement or document |
| Food-contact polyolefins | FDA 21 CFR 177.1520 | Food contact substance notification or letter of no objection |
| European food-contact plastics | Commission Regulation (EU) No 10/2011 | Overall migration and specific migration limits for simulants A, B, D2 |
| Pharmaceutical packaging polymers | Ph. Eur. 3.1.3, USP <661.1> | Polyolefin composition, extractables, heavy metals |
| Hazardous substances in electrical equipment | RoHS Directive 2011/65/EU, Annex II | Lead, mercury, cadmium, hexavalent chromium, PBB, PBDE |
| Chemical safety in Europe | REACH Regulation (EC) No 1907/2006 | Candidate list SVHC declaration |
| Packaging and packaging waste | EU Directive 94/62/EC | Sum of lead, cadmium, mercury, chromium VI < 100 mg/kg |
| Oxidative thermal stability | ISO 11357-6:2018 | Oxidative induction time at 200 °C |
The operational boundary for NAV103-100 is therefore defined by its low-flow LDPE architecture: it is selected where parison stability, die swell control, and soft-touch flexibility are required, and it is not selected where high-speed thin-web draw-down, high-stiffness packaging, or high-heat sterilisation is dominant. Sterilisation by steam above 105 °C is generally outside the service window for unfilled LDPE; ethylene oxide or radiation validation must be performed on the finished article. Application-specific migration testing is required before use in fatty-food contact because LDPE can absorb lipophilic constituents and release them during storage.
