LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density
- Product Name: LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density is typically used in formulations when melt flow rate and density and processing temperature and pressure must be controlled within specific ranges.
| HS Code | 249517 |
| Density | 0.935 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 3.5 g/10 min |
| Tensile Strength At Yield | 13.8 MPa |
| Tensile Strength At Break | 27.6 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 0.586 GPa |
| Vicat Softening Point | 100°C |
| Melting Point | 125°C |
| Crystallization Temperature | 110°C |
| Hardness Shore D | 55 |
| Brittleness Temperature | < -70°C |
| Thermal Expansion Coefficient | 1.5E-4 1/°C |
| Specific Gravity | 0.935 |
| Water Absorption 24 Hr | <0.01% |
As an accredited LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density typically supplied in 25 kg polyethylene bags, palletized on 1,000 kg pallets, stretch-wrapped. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): LyondellBasell Icorene 3545 ORE 3216 LLDPE in 25 kg bags, palletized, shrink-wrapped, and secured for shipment. |
| Shipping | LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density is a non-hazardous polymer resin. It is typically shipped in 25 kg bags or bulk containers on pallets, requiring clean, dry transport. Store away from heat, moisture, and sunlight. Standard industrial handling applies. No special dangerous-goods classification. |
| Storage | Store at ambient temperature in a cool, dry, well-ventilated area away from direct sunlight, heat, flames, and ignition sources. Keep containers or bags tightly closed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure and static buildup. Use original packaging, stack securely, and separate from incompatible chemicals such as strong oxidizers. Maintain good housekeeping; avoid breathing dust or fines. |
| Shelf Life | Shelf life is typically 12 months from manufacture when stored unopened in original packaging, cool, dry, and protected from direct sunlight. |
In rotomoulded potable water tanks, the linear low-density polyethylene powder is required to produce void-free walls at a peak internal air temperature below 200 °C. LyondellBasell Icorene 3545 ORE 3216 is processed on a carousel or shuttle machine with a mould rotation ratio of 4:1 on the primary axis and 1:1 to 1.6:1 on the secondary axis; the actual arm-speed profile is adjusted so that powder tumbling remains continuous through the gel phase and no dead zones persist at the tank bottom corner. Oven air temperature is typically set at 260–290 °C, and the part is removed only after the internal air reaches 190–200 °C for 8–12 min depending on wall mass. Compliance for potable water contact requires NSF/ANSI/CAN 61 extraction testing and FDA 21 CFR 177.1520(c) for olefin polymers; the tank fabricator must maintain documented migration limits for total organic carbon and specific contaminant species. For a 6–8 mm nominal wall, cooling is conducted first in forced air at 10–15 °C for 15–20 min, then water mist to reduce warpage at boss locations. Venting is critical: a 12 mm PTFE vent tube is installed at the mould parting line to equalise internal pressure; a blocked vent raises internal pressure during heating and produces blowholes at the last point to freeze. The end article is a rotationally moulded potable water tank or caravan water storage cell with integrally moulded threaded inserts; the inner surface must show no bridging or pinholes when tested by a 20 kV holiday detector after post-mould trimming. Mechanical acceptance follows ASTM D1998 for free-standing tanks. Powder stored above 50 °C or exposed to direct sunlight can oxidise and shift colour; if moisture content exceeds 0.01 wt%, a dehumidified holding hopper is required to prevent steam pinholes.
How does feedstock particle size distribution determine wall porosity in agricultural tank bodies?
Feedstock retained on a 500 µm sieve is not an arbitrary quality indicator in rotomoulding of agricultural liquid-tight tanks. Coarse fractions slow the initial sintering rate because each particle must absorb heat across a smaller specific surface area before a continuous melt film forms at the mould wall. Icorene 3545 ORE 3216 powder should be checked by sieve analysis per ASTM D1921 or ISO 4610 before each production campaign, with the distribution documented in the table below. In agricultural tank bodies, processors typically add 2.0–2.5 wt% carbon black masterbatch or 0.15–0.30 wt% hindered amine light stabiliser to meet 24-month outdoor exposure requirements, and dry blending must be tumble-mixed for at least 20 min at 40 rpm to avoid light-stabiliser agglomerates on the inner surface. Oven residence time is extended by 10–15% relative to unpigmented parts because carbon black raises the effective melting endotherm. Peak internal air temperature should remain below 205 °C to limit oxidative embrittlement of the inner surface, but above 185 °C to ensure complete coalescence at boss junctions. The end product is a liquid fertiliser or pesticide tank with UN 1H1 packaging certification under ADR/RID, tested by hydraulic pressure at 50 kPa and drop impact at −18 °C. If the coarse fraction exceeds 5 wt%, porosity is concentrated at the tank bottom corner where powder tumbling is least turbulent; a prototype cross-section must be polished and examined under 20× magnification before industrial production.
| Particle size fraction | Typical target | Observed defect when limit exceeded |
|---|---|---|
| Retained on 500 µm (35 mesh) | <3 wt% | Surface porosity at low-turbulence zones |
| 500–250 µm | 45–60 wt% | Reduced melt pool mobility if too high |
| 250–150 µm | 25–35 wt% | Poor interstitial filling if too low |
| <150 µm | <12 wt% | Fines entrainment and uneven sintering |
Marine Flotation Modules and Low-Temperature Impact Behaviour
Because marine floats experience repeated wave-induced torsional loading, wall thickness is usually not uniform around a biaxial rotomoulded part. The Icorene 3545 ORE 3216 feedstock is processed at oven temperatures of 275–300 °C to produce dense walls in the 4–8 mm range, with the rotation ratio deliberately set in the range 3.5:1 to 4:1 so that wall thickness at the ends does not fall below 80% of the nominal value. Low-temperature impact testing follows ISO 179-1/1eA at −20 °C, with moulded plaques cut from the actual float wall rather than compression-moulded sheets; this is important because the rotomoulded surface can be 10–15% lower in notched impact strength than a compression-moulded plaque of the same formulation. Seawater exposure requires no plasticiser or anti-hydrolysis additive, but a UV stabiliser package consisting of 0.20–0.35 wt% HALS and 0.10–0.20 wt% antioxidant is typical for a 60-month service life in tropical latitudes. The mould is opened only after the internal air temperature has fallen below 70 °C; demoulding above 80 °C creates localised warpage at flat deck sections and can generate internal stress that later manifests as stress cracking around embedded fasteners. End articles are hollow buoyancy modules, pontoon floats, or dock fenders with closed-cell polyurethane foam injected through 25 mm vent ports after cooling; the foam fill must not exceed 15–20 kg/m³ density if the wall is to remain the primary buoyancy barrier. Because published data on fatigue crack growth for this exact LLDPE powder are limited, fabricators should qualify each new arm-speed profile by thermal cycling the prototype 50 times between −20 °C and 40 °C and inspecting for stress whitening before committing to production.
For rotationally moulded playground enclosures, designers commonly require a minimum wall thickness of 4 mm at all corners and 5 mm across flat sections to resist entrapment and impact loads. Regrind addition is normally limited to 15–20 wt% of the same colour because higher fractions reduce melt flow and increase pinhole occurrence at sharp radii. The powder is dry-coloured with 0.5–1.0 wt% UV-stabilised pigment masterbatch and processed in an oven at 260–280 °C. Compliance for the finished article follows EN 71-3 for migration of heavy metals and ASTM F1487 for impact attenuation of playground equipment when the moulded panel is part of a slide or tunnel. A post-moulding flame treatment at 38–42 mN/m surface tension is applied before the application of anti-graffiti polyurethane topcoats; without the treatment, coating delamination occurs within 12–18 months in outdoor service. The moulded part is an enclosed tunnel segment, roof cap, or interactive play panel with integrally formed bolt bosses. Published data for regrind fractions above 25% in this specific ORE 3216 grade are limited; any plant trial above that threshold requires thermal conductivity measurement and a 0.4 power reduction on the oven heater to avoid surface oxidation.
When industrial bulk containers require UN approval under ADR/RID for solid hazardous material
Regulatory drop testing of an 11G intermediate bulk container imposes a different stress state than routine top-lift handling. The rotomoulded container wall is targeted at 6–10 mm and moulded in one shot to eliminate weld lines; the fabricated assembly must pass a drop test onto the largest face after conditioning at −18 °C, followed by a stack-load test at 40 °C for 28 days per ADR/RID 6.5.6.6 and 6.5.6.11. The Icorene 3545 ORE 3216 feedstock is dry-blended with 1.5–2.0 wt% carbon black to provide ESCR protection, and the melt flow rate of incoming powder is controlled by ISO 1133-1 at 190 °C/2.16 kg within an agreed lot-to-lot range because a shift upward by 15% can produce tearing at the tie-down lugs during impact. Mould design for a UN container requires a minimum internal radius of 12 mm at each wall-to-floor transition; sharper radii create stress concentrations that fail the drop test after environmental stress cracking. The end product is a rigid plastics IBC body or bulk waste container for solid hazardous material, marked with the UN specification code, density and stacking load. A compliance checklist is provided in the table below.
| Standard / clause | Test | Condition |
|---|---|---|
| ADR/RID 6.5.6.6 | Drop test on largest face | −18 °C, filled to capacity |
| ADR/RID 6.5.6.11 | Stack load | 40 °C, 28 days |
| ASTM D1693 | ESCR | 10% Igepal, 50 °C |
| ISO 1133-1 | Melt flow rate | 190 °C/2.16 kg |
Evaluating impact recovery in road traffic structures requires accounting for low-temperature ductile-to-brittle behaviour in rotationally moulded LLDPE. Icorene 3545 ORE 3216 is processed into hollow bollards, lane separators, and parking bay markers at a wall thickness of 5–7 mm, using a biaxial rotation ratio of 3:1 to 4:1 and an oven air temperature of 270–290 °C. The part is quenched slowly in ambient air rather than water mist, because rapid cooling increases crystallinity at the outer skin and lowers cold weather impact performance; a slower cool below 110 °C over 25–35 min promotes a tougher interlamellar amorphous phase. Pigmentation for traffic orange or yellow uses 1.0–2.0 wt% cadmium-free masterbatch with UV stability per RAL 2000 or RAL 1007; the moulded colour must not shift by more than ΔE 3 after 2,000 h in xenon arc weathering per ISO 4892-2. The end article is tested by vehicle-impact survival in low-speed laboratory pendulum testing, typically at 10 km/h and −10 °C, with the requirement that the bollard returns to within 10° of vertical after impact and shows no through-wall crack. When the part is ballasted with sand or concrete, the fill height must not exceed 70% of the internal cavity to leave an air gap for energy absorption; solid fill converts the structure into a rigid column and produces brittle base fracture during side impact.
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- LyondellBasell Icorene 3545 ORE 3216 Polyethylene, Linear Low Density is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
LyondellBasell Icorene 3545 ORE 3216 is a linear low-density polyethylene resin produced with a metallocene catalyst system and a 1-octene comonomer. The grade is positioned for rotational moulding and heavy-gauge hollow-part operations in which low-temperature ductility, slow-crack-growth resistance, and controlled melt flow are specification-critical. Published distributor data sheets report a nominal density of 0.934 g/cm³ when tested according to ISO 1183-1:2019 and a nominal melt flow rate of 3.5 g/10 min when tested according to ISO 1133-1:2022 at 190 °C under 2.16 kg. These values are target values rather than lot-release limits; the certificate of analysis issued for each production batch defines the formal lot-specific range.
The molecular architecture of the grade is distinguished by a narrow molecular weight distribution and a uniform short-chain branching distribution. Because 1-octene is the comonomer, tie-chain formation in the amorphous phase is more efficient than in 1-butene-based linear low-density polyethylene at equivalent density. The practical consequence is a measurable shift in the stiffness-impact balance when tested under ISO 527-2/1A tensile conditions and ISO 179-1/1eA notched Charpy impact conditions. The additive package associated with the ORE 3216 designation includes phenolic antioxidant stabilization and acid neutralization; the product is supplied as a pelletized resin for subsequent grinding or melt compounding unless a custom micronized variant is specified.
What differentiates a metallocene-catalysed octene LLDPE from legacy Ziegler-Natta and autoclave LDPE grades?
At equivalent density and melt flow rate, the metallocene architecture changes the property envelope. Conventional Ziegler-Natta butene linear low-density polyethylene typically exhibits a heterogeneous comonomer distribution in which lightly branched high-molecular-weight chains coexist with highly branched low-molecular-weight chains. This distribution broadens the melting endotherm, raises extractable fractions, and reduces slow-crack-growth resistance in notched constant-load tests such as ISO 16770. Autoclave low-density polyethylene carries long-chain branching; this provides shear-thinning and bubble stability in tubular film but lowers environmental stress-crack resistance and tensile modulus. Icorene 3545 ORE 3216 uses a metallocene catalyst to narrow the composition distribution, producing a sharper melting endotherm and a flatter stiffness-impact relationship. The narrow distribution also reduces low-molecular-weight tails that contribute to elevated hexane extractables when measured using the extraction approaches referenced in FDA 21 CFR 177.1520.
The following table summarises the comparative position of the grade against major polyethylene classes. The entries are representative published ranges, not design allowables for a specific moulded part.
| Property or characteristic | Icorene 3545 ORE 3216 | Ziegler-Natta butene LLDPE | Autoclave LDPE | HDPE |
|---|---|---|---|---|
| Density, ISO 1183-1 (g/cm³) | 0.934 | 0.918–0.940 | 0.918–0.930 | 0.940–0.965 |
| Melt flow rate, ISO 1133-1 (g/10 min, 190 °C, 2.16 kg) | 3.5 | 0.5–5.0 | 0.2–70 | 0.2–30 |
| Primary comonomer | 1-octene | 1-butene or 1-hexene | None; free-radical long-chain branching | None or 1-butene |
| Molecular weight distribution | Narrow | Broad | Broad | Broad |
| Short-chain branching distribution | Uniform | Heterogeneous | Long-chain branching | Highly linear |
| Environmental stress-crack resistance, ASTM D1693 | High | Moderate | Low | Moderate |
| Low-temperature notched Charpy impact, ISO 179-1/1eA | High ductile response | Moderate | Low | Moderate to high |
When the resin is converted to 35 mesh (500 µm) powder and processed on a four-arm shuttle rotational moulding machine, the recommended oven set-point is typically 280–300 °C. The peak internal air temperature is normally controlled at 200–220 °C, while the mould surface temperature is maintained in the range of 170–190 °C before cooling. Heating below a peak internal air temperature of 190 °C can leave unfused polymer particles and microporosity at the inner wall; the condition is detectable by cross-sectional optical microscopy and by reduced tensile elongation at break when tested in accordance with ISO 527-2/1A. Cooling is typically staged with forced air followed by water spray at a rate of 10–15 °C/min, with demoulding delayed until the part surface is below 70 °C. Powder dry flow obtained by ASTM D1895 Method A commonly falls between 25 s/100 g and 35 s/100 g for a properly ground 35 mesh fraction, and apparent bulk density is generally 0.45–0.50 g/cm³ when measured by ASTM D1895 Method B. These powder properties influence wall-thickness uniformity more than pellet melt flow rate because rotational moulding is conducted at near-zero shear.
On a 3.0 m diameter cylindrical tank tool with a 5:1 primary-to-secondary rotation ratio, wall-thickness variation depends on oven-air velocity, tool surface emissivity, and powder deposition behaviour. The narrow molecular weight distribution of Icorene 3545 ORE 3216 reduces high-temperature sag in vertical wall sections during the heating phase. Published data for this specific tooling configuration is limited, and converters commonly generate their own internal process curves because part performance is governed by tool geometry, heating rate, and cooling kinetics rather than by resin data alone.
When regrind incorporation exceeds 20% in rotational moulding
Recovered flash, start-up purgings, and rejected parts are ordinarily ground to 35 mesh and reincorporated into the moulding charge. Above 20 wt% regrind, melt-flow behaviour can shift because the first heating cycle consumes a fraction of the phenolic stabilizer and can introduce local oxidative chain extension. The shift is non-linear: process records from production-scale rotomoulding lines indicate that increasing regrind from 20 wt% to 30 wt% commonly reduces the melt flow rate of the blended charge by 0.3–0.8 g/10 min when retested by ASTM D1238 at 190 °C, 2.16 kg. The change is material-history dependent and cannot be predicted from virgin resin data alone.
Processors monitoring thermal-oxidative stability use oxidative induction time by ISO 11357-6. A measured OIT below 30 min at 210 °C after repeated regrind cycles indicates sufficient stabilizer depletion to require corrective action: reducing peak internal air temperature, shortening oven residence time, or reducing regrind fraction. At regrind fractions above 30 wt%, porosity from trapped volatiles also becomes more probable because the regrind fraction carries an altered surface energy compared with virgin 35 mesh powder. The practical control response is to increase heating time in 30–60 s increments while monitoring the peak internal air temperature, rather than increasing oven set-point above 300 °C.
Thermal-oxidative stability limits and additive compatibility
The upper processing temperature is 300 °C in rotational moulding ovens and 250 °C in extrusion melt-compounding operations. Prolonged residence time above these thresholds can consume the antioxidant package and generate oxidized gel defects. Pre-drying is not required when resin is stored in intact sealed packaging; if storage occurs at relative humidity above 60% or surface condensation is visible, the resin should be dried for 4 h at 80 °C before melt processing. Amine-based antistatic additives and certain hindered amine light stabilizers can interact with the catalyst residue and oxidation by-products, and their compatibility should be verified through oven-aging evaluations using ISO 4577:1983 before production formulation changes.
The resin is insoluble in most polar solvents at ambient temperature but swells in hot aromatic and chlorinated hydrocarbons. Long-term contact with strong oxidizing acids should be avoided because oxidative embrittlement may occur. No slip or antiblock additive is intentionally loaded in the base ORE 3216 package, so surface coefficient of friction and blocking behaviour are controlled by the converter through additive masterbatch or post-mould surface treatment.
Under FDA 21 CFR 177.1520(c), olefin polymers may be used in food-contact articles provided density, extractable fraction, and end-use temperature conditions remain within the regulatory limits. Compliance with European food-contact requirements is assessed under Regulation (EU) No 10/2011 and its Annex I migration limits; the overall migration limit is 10 mg/dm² or 60 mg/kg depending on the food-contact configuration. Additionally, the material and its molded articles are subject to REACH Annex XVII restrictions and RoHS Directive 2011/65/EU Annex II screening for lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. Specific migration of residual 1-octene comonomer and any additives should be confirmed by the converter under the intended food simulant and time-temperature condition prescribed in Regulation (EU) No 10/2011 Annex III. Published data for this specific configuration is limited when the contact article is subjected to repeated steam sterilization above 80 °C, and end-use validation remains the responsibility of the food-contact article manufacturer.
Typical conversion operations include rotationally moulded agricultural hoppers, industrial storage tanks, and material-handling bins. For such parts, wall-thickness specifications of 4–6 mm are common, and instrumented puncture resistance is often verified using ISO 6603-2 at -20 °C to confirm ductile failure behaviour. Because final part performance is governed by mould geometry, oven-air velocity, powder particle-size distribution, and cooling rate, converter-generated process capability data is required for a specific tool. The resin data sheet defines the material envelope; it does not replace part-level validation under the actual moulding cycle.
