LyondellBasell Icorene 3546 BUE 5593 Polyethylene, Linear Low Density
- Product Name: LyondellBasell Icorene 3546 BUE 5593 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 3546 BUE 5593 Polyethylene, Linear Low Density is typically used in formulations when melt flow rate, density, and particle size distribution and peak internal air temperature, oven residence time, and cooling rate must be controlled within specific ranges.
| HS Code | 433357 |
| Density | 0.935 g/cm³ |
| Melt Index | 3.5 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 10.0 MPa |
| Tensile Strength At Break | 22.0 MPa |
| Elongation At Break | 800% |
| Flexural Modulus | 0.350 GPa |
| Vicat Softening Point | 100 °C |
| Melting Point | 125 °C |
| Hardness Shore D | 50 |
| Haze | 15% |
| Gloss | 50% |
| Dart Drop | 100 g |
| Elmendorf Tear Strength | 300 g |
| Coefficient Of Friction | 0.2 |
As an accredited LyondellBasell Icorene 3546 BUE 5593 Polyethylene, Linear Low Density factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg polyethylene bags, palletized and shrink-wrapped for convenient, safe handling and storage of LyondellBasell Icorene LLDPE resin. |
| Container Loading (20′ FCL) | 20′ FCL loaded with LyondellBasell Icorene 3546 BUE 5593 linear low-density polyethylene resin, palletized bags, securely stowed for ocean transport. |
| Shipping | LyondellBasell Icorene 3546 BUE 5593 Polyethylene, Linear Low Density is a non-hazardous plastic resin. It is typically shipped in 25 kg bags or bulk bags, palletized and stretch-wrapped. Transport in dry, clean, ventilated trucks or containers, avoiding moisture, contamination, and excessive heat. No special dangerous goods documentation required. |
| Storage | Store LyondellBasell Icorene 3546 BUE 5593 Polyethylene, Linear Low Density, in a cool, dry, well-ventilated area away from direct sunlight, heat, flames, and ignition sources. Keep bags or containers tightly closed, off the floor, and protected from moisture, dust, UV radiation, and physical damage. Avoid strong oxidizers. Maintain ambient temperature and follow the SDS and local regulations. |
| Shelf Life | Shelf life is generally 24 months when stored unopened in a cool, dry, well-ventilated area away from direct sunlight. |
In potable agricultural water storage, the powder feed is charged to a carousel-type three-arm rotational molding machine with cast aluminum molds heated in a forced-air oven at 270–290 °C. The dry-blend formulation is 100 parts LyondellBasell Icorene 3546 BUE 5593 powder, 15–25 wt% clean plant regrind from the same grade, and 2.0–2.5 wt% carbon black masterbatch where the BUE 5593 additive package does not already supply the specified outdoor UV protection. The mold rotates at a 4:1 primary-to-secondary axis ratio through the heat cycle until the internal air temperature reaches 190–205 °C. Wall thickness is then mapped with an ultrasonic gauge at the sidewall, base radius, and top rim. Potable-water service requires lot-specific clearance under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011; tank design verification follows ASTM D1998-21 for upright polyethylene storage tanks. The cooling cycle uses forced air to 110 °C, then a water mist to 80 °C; demolding below 80 °C prevents base warpage. Finished product types include 500 L, 1,000 L, and 5,000 L seamless vertical storage tanks. Field failures on these lines are usually corner knit lines caused by powder bridging at the mold surface, not bulk resin failure; vent diameters of 1.5–2.0 mm per 10 L mold volume are specified to release trapped gas without producing pinholes.
What Limits Recycled Content in Rotomolded Chemical IBCs Under ASTM D1693 Stress Crack Testing?
For aggressive alkaline and surfactant-bearing liquids, the outer shell of a 1,000 L intermediate bulk container is rotationally molded with regrind limited to 10–20 wt%; higher regrind fractions lower environmental stress crack resistance at the liquid-line and around the drain boss. The mold enters a shuttle-type oven at 260–285 °C for 18–32 min, and the peak internal air temperature is held below 205 °C to prevent oxidative embrittlement of the carbon black-stabilized skin. Dry-blend addition for outdoor chemical service is 0.2–0.5 wt% antioxidant masterbatch, 0.05–0.15 wt% acid scavenger, and 2.0–2.5 wt% carbon black masterbatch if not already present in the grade. After cooling and demolding, wall thickness is verified at 12 points including the top corner radius and valve boss; a minimum wall of 3.5 mm is required for UN 31A/Y dangerous goods certification. ESCR is evaluated according to ASTM D1693-15e1 Condition B in 10% Igepal CO-630 solution, with a minimum time-to-failure of 100 h specified for chemical-contact units. End products include double-walled IBCs, cubic containers for liquid fertilizer, and dosing tanks for antimicrobial fluids. The primary processing failure is not tensile yield but stress cracking adjacent to vertical ribs, so mold design must limit wall-thickness transitions to less than 25% change over 20 mm of linear wall.
| Wall thickness | Oven set temperature | Peak internal air temperature | Heating time | Cooling rate to 90 °C |
|---|---|---|---|---|
| 3–5 mm | 250–270 °C | 185–195 °C | 12–18 min | 8–12 °C/min |
| 6–10 mm | 270–290 °C | 190–205 °C | 18–28 min | 5–8 °C/min |
| 11–15 mm | 290–300 °C | 200–210 °C | 28–38 min | 3–5 °C/min |
Representative process envelope for cast aluminum molds; steel molds require 10–15% longer heating time under identical internal air temperature targets.
Outdoor play platforms and slides are rotomolded from a powder formulation that must retain low-temperature impact resistance after prolonged ultraviolet exposure. The dry-blend contains 100 parts powder, 2.0–4.0 wt% UV-stabilized color masterbatch, and 0.1–0.3 wt% hindered amine light stabilizer when the project specification exceeds the weathering package in the BUE 5593 suffix; regrind is capped at 5–15 wt% and drawn only from non-safety-critical internal walls. The fabricated steel mold is heated in a convection oven at 250–270 °C to an internal air temperature of 180–190 °C, then cooled in still air to preserve flatness of slide faces; compliance with EN 1176-1:2017 and REACH Regulation (EC) No 1907/2006 is verified after demolding. Finished parts include slide beds, climbing wall sections, tunnel modules, and rooftop play elements.
Underground Cable Pit Molding, Insert Retention, and EN 124-1 Load Class Verification
Because the finished part must accept a metallic access cover and survive occasional vehicle loading, underground cable pit production uses a steel mold with inserted threaded bosses and additional cooling channels in the base plate. The dry-blend addition is 100 parts powder, 10–20 wt% regrind, and 2.0–2.5 wt% carbon black masterbatch; no fiber filler is used because the load class criteria in EN 124-1:2015 require consistent notched impact response in the base rib intersections. The mold is heated to 270–300 °C in a closed-loop gas oven, with peak internal air temperature held at 200–210 °C for 28–38 min to consolidate the thick base ribs. The demolded part is cooled in still air to 100 °C before insert torque testing; metal inserts must show no pull-out at 25 N·m or the specified assembly torque, whichever is higher. After assembly, the pit is tested under EN 124-1 load class A15 or B125 depending on the installation area. Finished product types include cable distribution pits, valve pits, water meter boxes, and roadside inspection chambers. The primary failure mode is insert pull-out from differential shrinkage around the threaded boss; mold inserts are preheated to 120 °C before charging to reduce local solidification stress.
Double-wall insulated fish tubs are produced by rotational molding of an inner food-contact shell, then an outer structural shell, followed by polyurethane foam injection. The food-contact layer is 100 parts Icorene 3546 BUE 5593 powder with no regrind; the outer shell contains 20–30 wt% regrind from post-industrial scrap of the same grade. Compliance for the inner layer is verified under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011, including overall migration testing according to EU 10/2011 Annex V. After the two skins are consolidated, a closed-cell polyurethane foam system is injected into the cavity at 0.5–1.0 kg/min per mold, with target core density 40–60 kg/m³ and a foam gel time of 180–220 s. The mold is cooled with forced air at 5–8 °C/min to 80 °C to avoid skin-to-foam separation. Finished product types include 20 L, 50 L, and 80 L insulated fish tubs, food transport boxes, and cold chain sample carriers. The main processing defect is foam core shrinkage; the outer mold must remain closed for 12–18 min after foam injection to maintain dimensional stability.
Regrind Ratios Above 30% Shift the Low-Temperature Notched Impact Transition in Heavy-Duty Pallets
The notched impact transition in rotomolded pallets is evaluated by controlling regrind ratio because the drop-test response at -20 °C changes rapidly once recycled content exceeds 30 wt%. The production formulation for a 1,200 × 1,000 mm hygienic pallet is 100 parts powder, 20–30 wt% clean regrind, 0.5–2.0 wt% pigment masterbatch, and 0.05–0.1 wt% external process aid to reduce powder bridging in the fork-lift channels. The mold is a steel cavity with internal gussets, heated in a Carousel oven at 280–300 °C; the internal air temperature is held at 195–205 °C for 28–35 min. Cooling is performed with forced air at 10–15 °C/min to 90 °C, then ambient still air. Pallets are tested under ISO 8611-1:2021 for corner drop, bending stiffness, and creep resistance; a minimum 50 cycle creep recovery at 40 °C is specified for racking loads. Finished product types include general-purpose export pallets, hygienic one-piece pallets for pharmaceutical warehouses, and corrugated box tote bins. The critical process defect is brittle fracture at the fork opening when water-quench cooling is used; therefore water quench is avoided below 90 °C to prevent residual stress concentration. Published data for the exact regrind-ratio transition in this mold geometry is limited; plant qualification should use an instrumented drop tower before full production.
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- LyondellBasell Icorene 3546 BUE 5593 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 3546 BUE 5593 is a linear low-density polyethylene compound supplied as a pre-stabilized rotational moulding powder. The base resin is an ethylene-α-olefin copolymer in which short-chain branching reduces crystallinity relative to high-density polyethylene and lowers the melting plateau. Representative manufacturer data place the density at 0.934 g/cm³ under ISO 1183-1 and the melt mass-flow rate at 4.0 g/10 min under ISO 1133-1:2022 at 190 °C and 2.16 kg. The suffix BUE 5593 identifies a stabilization and colour package rather than the polymer backbone. The grade is typically selected for outdoor rotomoulded articles where ultraviolet resistance, low-temperature ductility, and environmental stress-crack resistance are required simultaneously.
What Distinguishes an Ultraviolet-Stabilized Linear Low-Density Rotational Moulding Grade from General-Purpose LLDPE?
The differentiation is not the comonomer type alone but the combination of molecular architecture, additive package, and powder morphology. The nominal density of 0.934 g/cm³ places the material in the upper segment of the linear low-density classification and below the 0.940 g/cm³ boundary commonly used for medium-density rotomoulding resins. The melt flow of 4.0 g/10 min is sufficiently high to densify a uniform wall at typical rotational moulding peak internal air temperatures of 190–210 °C, yet sufficiently low to retain melt strength during oven rotation. A general-purpose butene LLDPE film grade with a similar density often has different additive loadings, a pellet or microgranule form, and no guaranteed rotomoulding particle size distribution. It also generally lacks the long-term ultraviolet stabilization supplied in the BUE 5593 package. In a carousel-type single-arm machine with a forced-convection oven, the powder layer begins to sinter when the internal air temperature reaches approximately 120–140 °C and completes wall densification as the peak internal air temperature approaches 200 °C. The temperature must be measured with an in-mould Type K thermocouple rather than inferred from oven set point alone. Operating solely on oven air temperature introduces batch-to-batch variation because powder particle size, charge weight, and oven air velocity shift heat transfer.
Rotational moulding trials with this grade require monitoring the internal air temperature trace rather than fixed oven timers. The melting plateau associated with a density of 0.934 g/cm³ appears as a reduced rate of internal air temperature rise near 120–130 °C. Peak internal air temperature should be held within the 190–210 °C window for approximately 2–5 min depending on wall thickness. Published data for this specific configuration is limited for wall sections above 12 mm, and processor trials must establish the minimum peak temperature that eliminates microporosity without producing oxidative discoloration. The practical processing band is narrow enough that pyrometer-only control of the external mould surface is not sufficient for critical parts.
Mechanical Property Envelope Under ISO 527-2 and ISO 178
Tensile test data from rotomoulded or compression-moulded sheet place yield stress near 18 MPa and tensile elongation at break greater than 800% under ISO 527-2. The flexural modulus of approximately 650 MPa under ISO 178 is lower than that of many high-density polyethylene rotomoulding grades, which typically range from 800 to 1,000 MPa at comparable wall thickness. Low-temperature impact response measured by ASTM D746 gives a brittleness temperature below −76 °C, indicating ductile behaviour in applications that experience sub-zero impact. These values are composition- and cooling-rate dependent. Rapid cooling suppresses crystallinity and lowers modulus, while slow in-mould cooling raises density and stiffens the wall at the expense of impact resistance. The final rotomoulded wall can therefore exhibit a property range even when the powder lot meets the same data sheet limits.
| Property | Test method | Representative value |
|---|---|---|
| Density | ISO 1183-1 | 0.934 g/cm³ |
| Melt mass-flow rate | ISO 1133-1:2022, 190 °C, 2.16 kg | 4.0 g/10 min |
| Tensile stress at yield | ISO 527-2 | 18 MPa |
| Tensile elongation at break | ISO 527-2 | >800% |
| Flexural modulus | ISO 178 | 650 MPa |
| Vicat softening temperature | ISO 306/A50 | 118 °C |
| Brittleness temperature | ASTM D746 | <−76 °C |
| Environmental stress crack resistance | ASTM D1693, 100% Igepal CO-630, Condition B | >1,000 h |
When the Specification Requires Long-Term Environmental Stress Crack Resistance
Environmental stress crack resistance is critical in rotomoulded tanks and containment articles exposed to surfactants, alcohols, or agricultural chemicals. The grade is characterized by an ASTM D1693 value exceeding 1,000 h in 100% Igepal CO-630, Condition B. This resistance arises from the comonomer distribution and relatively low crystallinity. However, the ASTM D1693 test is a constant-strain notched-specimen test and does not model all chemical environments. For chemical-specific service, immersion testing under ISO 175 or ISO 4433-1 with the actual fluid should be conducted. Weldability and internal stress from rotational moulding depend on cooling rate. Rapid cooling can increase residual stress and reduce apparent environmental stress crack resistance, even when moulded plaque data meet the datasheet threshold. In multi-layer or foamed-wall structures, the ESCR contribution must be verified on the finished article because foam layers and regrind layers can concentrate stress differently from a solid rotomoulded sheet.
Unlike cross-linked polyethylene, this grade remains thermoplastic and can be reground and reprocessed within the same rotomoulding operation, although ultraviolet stabilizer concentration declines with each heat history. Regrind addition above 20% by weight can shift the melt flow and reduce the outdoor stabilization reserve. Lot-specific melt flow monitoring under ISO 1133-1:2022 and the producer’s regrind guidelines should therefore be applied. Weld lines, inserts, and undercut regions may act as stress concentrators under sustained load; these areas should be examined with notched tensile impact testing under ISO 8256 when the part is intended for long-term outdoor service.
Comparative Position Against Medium-Density and Cross-Linked Polyethylene in Rotational Moulding
Relative to high-density and medium-density rotomoulding materials, Icorene 3546 BUE 5593 trades stiffness and upper service temperature for deep-draw moulding, impact toughness, and environmental stress crack resistance. The lower crystallinity reduces warpage tendency in thick walls and permits demoulding from severe undercuts. Against cross-linked polyethylene, the grade avoids the post-moulding cure stage and remains weldable; however, cross-linked PE generally provides better creep resistance above 60 °C and better burst resistance in pressurised service. The melt flow of 4.0 g/10 min is also more suited to complex rotoformed geometries than a fractional-melt HDPE, but it may produce greater flow marks in flat panels if peak internal air temperature is excessive. For thin-walled double-wall tanks, the lower stiffness of this LLDPE must be compensated by ribbing, wall-section increase, or structural inserts.
| Attribute | Icorene 3546 BUE 5593 LLDPE | General-purpose butene LLDPE | HDPE rotomoulding | Cross-linked polyethylene |
|---|---|---|---|---|
| Density, ISO 1183-1 | 0.934 g/cm³ | 0.918–0.925 g/cm³ | 0.940–0.945 g/cm³ | 0.935–0.945 g/cm³ |
| Tensile yield stress, ISO 527-2 | 18 MPa | 10–15 MPa | 20–26 MPa | 18–25 MPa |
| Flexural modulus, ISO 178 | 650 MPa | 350–500 MPa | 800–1,000 MPa | 600–800 MPa |
| ESCR, ASTM D1693, Condition B | >1,000 h | 200–600 h | <100 h for homopolymer; higher for comonomer-modified grades | >1,000 h |
| Brittleness temperature, ASTM D746 | <−76 °C | <−60 °C | −75 °C or lower depending on comonomer | <−70 °C |
| Ultraviolet stabilization | Included in BUE 5593 package | Often absent | Optional | Optional |
On production-scale carousel machines with direct gas-fired oven air at 280–320 °C, the practical demoulding time is controlled by cooling to below 70 °C internal air temperature to prevent warpage. The grade has no critical moisture-absorption pre-drying requirement, but powder stored below ambient temperature should be tempered to 20–25 °C before charging to avoid condensation-induced pinholes. Prolonged exposure above 230 °C internal air temperature leads to thermo-oxidative chain scission and crosslinking that can alter melt flow and impact behaviour. In closed moulds with deep pockets, local overheating can occur even when the average internal air temperature is within the recommended band, particularly in the first rotation axis stagnation regions.
If the End-Use Envelope Exceeds 60 °C Continuous Service, Verify Oxidative Induction Time
Polyethylene is limited by oxidative degradation rather than melting at continuous service temperatures. The Vicat softening temperature of 118 °C under ISO 306/A50 is not a continuous-use rating. For applications such as hot-liquid containers or engine-compartment components, oxidative induction time should be measured by ASTM D3895 or ISO 11357-6 on the final rotomoulded wall. Stabilization packages such as BUE 5593 are formulated for ultraviolet resistance, but antioxidant consumption accelerates at temperatures above 60–70 °C in oxygen-rich environments. Published data for this specific grade under long-term thermal ageing at 80–100 °C is limited; therefore, end-use validation must include forced-air oven ageing with tensile impact retention measured under ISO 527-2 or ISO 8256. The material should not be substituted for a dedicated high-temperature polyethylene in sustained hot-water or hot-chemical service unless accelerated ageing data demonstrate acceptable property retention.
Compliance statements should be confirmed through the manufacturer’s regulatory datasheet. The polyethylene base resin may meet food-contact requirements under FDA 21 CFR 177.1520 when used as specified, but the BUE 5593 additive package may require separate verification for direct food-contact or potable-water approvals. In the European Union, the polymer is subject to REACH registration obligations, and finished rotomoulded articles are outside the scope of RoHS Directive 2011/65/EU unless they are components of electrical or electronic equipment. Grade-specific food-contact status is not inferred solely from the base resin.
In comparison with a standard melt-compounded pelletized LLDPE for injection moulding, the Icorene 3546 BUE 5593 powder route eliminates pellet melting and permits low-shear rotomoulding of large hollow parts. However, the powder’s bulk density and particle size distribution affect wall thickness uniformity. A coarse particle fraction above 500 µm can create uneven melt fronts; the producer therefore supplies a controlled powder cut, and processors should measure retained fractions by ASTM D1921 or equivalent lot-release data before increasing charge weight in deep-draw tools. Fine particles can improve surface appearance but may reduce bulk flow and promote dust accumulation in open mould charging stations.
