LyondellBasell Icorene 3545 UV+ BUE 5325 Polyethylene, Linear Low Density
- Product Name: LyondellBasell Icorene 3545 UV+ BUE 5325 Polyethylene, Linear Low Density
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
- CONTACT NOW
- LyondellBasell Icorene 3545 UV+ BUE 5325 Polyethylene, Linear Low Density is typically used in formulations when low-temperature impact strength and UV resistance and melt processing temperature and rotomolding cycle time must be controlled within specific ranges.
| HS Code | 423130 |
| Density | 0.935 g/cm³ |
| Melt Flow Rate | 0.8 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 11 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | 700% |
| Elmendorf Tear Strength | 200 g |
| Dart Drop Impact | 150 g |
| Haze | 12% |
| Gloss | 80% |
| Coefficient Of Friction | 0.2 |
| Melting Point | 125°C |
| Vicat Softening Point | 110°C |
| Brittleness Temperature | -70°C |
| Uv Stabilization | Yes |
As an accredited LyondellBasell Icorene 3545 UV+ BUE 5325 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 stretch-wrapped for transport; each pallet contains 1,000 kg, typically 40 bags. |
| Container Loading (20′ FCL) | 20′ FCL container loading: LyondellBasell Icorene 3545 UV+ BUE 5325 Linear Low Density Polyethylene; 25 kg bags, palletized, shrink-wrapped, secured. |
| Shipping | Icorene 3545 UV+ BUE 5325 LLDPE is shipped as non-hazardous solid resin in 25 kg bags or bulk bags, palletized, stretch-wrapped, and loaded into dry containers or trucks. Store cool and dry, away from sunlight, heat, and oxidizers. No special UN placards required; follow local transport rules. |
| Storage | Store in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, sparks, flames, and strong oxidizing agents. Keep original containers or bags closed to prevent moisture, dust, and contamination. Palletize off the floor, avoid excessive stacking, and practice first-in, first-out. Maintain ambient temperatures; protect from prolonged UV exposure and ignition sources. Follow manufacturer’s safety data sheet recommendations. |
| Shelf Life | Shelf life: typically 24 months from date of manufacture in unopened original packaging, stored cool, dry, away from sunlight. |
Rotomoulded agricultural sprayer tanks in the 500–10,000 L class are manufactured from Icorene 3545 UV+ BUE 5325 powder using cast aluminium or stainless steel tooling. The rotomoulding powder is charged at 3.4–4.1 kg/m² for a nominal wall thickness of 6–9 mm; shot weight is determined by the projected surface area of the cavity plus an allowance of 8–12% for pinch-off at fill ports and drainage sumps. Oven air temperature is set between 280 °C and 300 °C, and the primary-to-secondary rotation ratio is held at 4.0:1–4.5:1. The peak internal air temperature is the critical control variable: for agri-chemical tanks it is controlled to 192–208 °C for 10–16 min. Exceeding 215 °C accelerates thermo-oxidative degradation of the UV stabilizer and produces an inner-surface waxy layer that can transfer to concentrated pesticide fluids; undertreating below 188 °C leaves micro-voids at the outer wall because the powder has not fully sintered. Cooling follows a three-step sequence of forced air to 85 °C, atomised water to 50 °C, and forced air to 32–35 °C before demoulding. Water quench is not used on flat side panels because cooling rates above 4–5 °C/min cause planar warpage and stress whitening at the mold split line. Chemical compatibility for fertilizer solutions and spray adjuvants is verified by immersion testing per ISO 175:2010 at 40 °C for 30 days using 10% w/w ammonium sulfate and separately a 1% w/w glyphosate formulation; acceptance is based on retention of tensile yield strength per ISO 527-1:2019 greater than 85% of the original value. Lot acceptance includes environmental stress crack resistance greater than 1,000 h per ASTM D1693-15e1 condition B in 100% Igepal CO-630 and tensile impact at −20 °C per ISO 8256:2004. Flange inserts are knurled to a depth of 0.5–0.8 mm and preheated to 120 °C before being placed in the tooling; this prevents melt leakage around the insert and reduces residual stress concentration around two-bolt flanges. End products include horizontal leg tanks, cone-bottom inductor tanks, and tractor-mounted sprayer tanks; all fluid-contact surfaces are rotomoulded without weld lines, so the fittings remain the primary leak-risk location rather than the shell.
What Governs the Demoulding Sequence in Foam-Filled Marine Dock Floats?
Marine buoyancy shells are rotomoulded with nominal wall thickness of 5–8 mm; the inner cavity is subsequently filled with expanded polystyrene blocks cut to 95–98% of the cavity volume at foam density 16–20 kg/m³. The foam fill is not introduced until the shell surface has cooled below 45 °C; otherwise the closed-cell foam can fuse to the polyolefin wall and reduce the reparability of through-rod tunnels. A central compression tube is bonded at 0.35–0.50 MPa end pressure, but the shell must withstand saltwater absorption freeze-thaw cycles because water ingress between foam beads expands at −10 °C. The BUE 5325 UV+ package is specified for continuous salt-spray exposure; accelerated weathering checks follow ISO 4892-3:2016 cycle 1 with UVA-340 lamps, 8 h UV at 60 °C and 4 h condensation at 50 °C, with retained Charpy impact evaluated per ISO 179-1:2010. Stress crack resistance after aging is tested by ASTM D1693-15e1 condition C in 10% Igepal at 50 °C; failure below 500 h triggers rejection for brackish water applications. End products include modular floating walkway pontoons, aquaculture cage collars, turbidity curtain floats, and navigation buoy shells; all through-rod penetrations use molded parabolic recesses of radius not less than 6 mm to limit notch sensitivity at the waterline. Demoulding sequence matters because the shell releases from the cavity side first while the core side remains warm; an early pull along the through-tube axis causes local stretch of 1–2 mm and later crack formation around rod penetrations. Therefore the shell is rotated 90° off the horizontal axis and lifted via two sling points positioned at 35–40% of the overall length.
During rotational moulding of playground tunnel sections and slide shells, the mold cavity is first textured by grit blasting to Ra 3.2–6.3 µm to reduce glare and hide minor wall-thickness variation. The grade is dry-blended with 1.5–2.5 wt% of high-load UV-stable color masterbatch; the melt index shift after blending is kept within ±0.5 g/10 min to avoid surging inside the cavity. Oven set points are reduced by 10–15 °C relative to agricultural tank moulding because thick ribs in slide rails and tunnel rings create local heat accumulation at the mold surface. Demoulding at 70 °C permits removal from aluminium tooling without deformation of long unsupported spans. For public playground components sold in North America the finished parts are evaluated against ASTM F1487-21 for head and neck entrapment, and in the European Union against EN 1176-1:2017 for structural integrity; where components are accessible to children younger than 36 months, heavy-metal migration is screened per EN 71-3:2019+A2:2021. Rotational moulded parts include crawl tunnels, play panels, slide hoods, and modular climber blocks; cornice radii are kept above 20 mm and reinforcing kiss-offs are spaced at 300–450 mm to avoid bowing under body load. The UV+ package is not a substitute for color fastness control; carbon black or phthalocyanine blue masterbatches are selected at 0.8–1.2 wt% for red and yellow pigmentation to avoid chalking within the first 3,000 h of accelerated weathering under ISO 4892-3:2016.
When Underground Utility Enclosures Require Deformation Resistance
Below-grade utility vaults and meter boxes are rotomoulded in wall thicknesses of 10–25 mm because lateral earth pressure and intermittent vehicle live loads require flexural stiffness beyond standard outdoor tanks. The powder is charged to 6.0–8.5 kg/m² of cavity area; the tooling is designed with external ribbing at 150–250 mm pitch and internal corner radii not less than 30 mm to reduce stress concentration at cable entry points. Peak internal air temperature is clamped at 195–205 °C; excessive dwell time above 210 °C lowers molecular weight and reduces ring stiffness after demoulding. Flexural modulus is determined per ASTM D790-17; the 2% secant modulus is used for structural verification rather than initial modulus because the enclosure wall deforms into the backfill before transmitting load. Plant-defined load tests apply 5 kN through a 100 mm diameter plate at the cover centre; deflection after 24 h shall not exceed 3% of the unsupported span. End products include transformer pads, irrigation valve boxes, pull box enclosures, and signal pole bases. For exposed lids, the BUE 5325 UV+ package is required only in the top 4–6 mm because below-grade sidewalls are shielded from UV radiation; recycled content is excluded from the outer surface to hold environmental stress crack resistance above 1,000 h per ASTM D1693-15e1. Threaded inserts for cover screws are installed after moulding with helical inserts rather than moulded-in brass threads because post-moulded inserts allow replacement after conduit entry modifications.
Food-Contact and Potable Water Tank Compliance Thresholds
For food-contact bins and potable water storage vessels, the grade must be covered by a formulation-specific FDA 21 CFR 177.1520 assurance and, where installed into public water systems, NSF/ANSI 61 certification of the finished tank. Process conditions are restricted: the mold release must be food-grade and fully volatile below 120 °C, and the internal air purge must use filtered air to avoid contaminant deposition on the inner wall. Extraction testing follows EU Regulation (EU) No 10/2011; overall migration is limited to 10 mg/dm² for the intended simulant and contact time. End products include conical storage bins up to 1,500 L, dough troughs, fish boxes, and potable water tanks for off-grid installations. Not all UV stabilizer packages are automatically acceptable for food contact; a supplier statement covering the exact BUE 5325 formulation is required before use in 177.1520-controlled applications. The inner wall must not be flame-polished because combustion by-products can remain at levels that exceed organoleptic thresholds for water contact.
Secondary containment sumps for acid dosing skids are produced as seamless double-wall shells with a continuous interstitial leak channel 25–40 mm deep; the outer shell is rotomoulded first, then the inner shell is fused over a removable core. The Icorene 3545 UV+ BUE 5325 grade is used for the outer shell because slow crack growth resistance is retained after outdoor exposure to sodium hypochlorite mist and hydrochloric acid vapour; chemical immersion acceptance is conducted per ISO 175:2010 in 12.5% w/v sodium hypochlorite and 10% v/v hydrochloric acid at 23 °C for 60 days, with allowable tensile yield retention not below 80%. The inner shell is typically a clarified LLDPE or high-density grade; the BUE 5325 shell is not used for direct solvent contact because aliphatic and aromatic hydrocarbons can plasticize the amorphous phase and reduce the effective service temperature. Secondary containment capacity follows EPA 40 CFR 264.175 at 110% of the largest tank volume; rotomoulded sumps eliminate corner welds, which are the predominant stress-crack initiation site in fabricated polyolefin containments. End products include pump skid basins, day-tank containments, and railcar transloading pads; all flat floor areas are crowned at 1–2° to allow drain-back to the low point sensor. Leak detection ports are machined after demoulding and fitted with compression seals; the channel is pressure-tested at 35 kPa air pressure for 15 min with maximum allowable pressure drop of 0.5 kPa before dispatch.
Competitive LyondellBasell Icorene 3545 UV+ BUE 5325 Polyethylene, Linear Low Density prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618005193850 or mail to sales8@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618005193850
Email: sales8@ascent-chem.com
Get Free Quote of Ascent Petrochem Holdings Co., Limited
Flexible payment, competitive price, premium service - Inquire now!
- LyondellBasell Icorene 3545 UV+ BUE 5325 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 UV+ BUE 5325 is a linear low density polyethylene (LLDPE) rotational molding powder. The product designation combines the Icorene resin family, the 3545 grade identifier, and the BUE 5325 color or additive formulation. The base polymer is an ethylene/α-olefin copolymer with a linear backbone and controlled short-chain branching. This structure differentiates the material from high-pressure low density polyethylene (LDPE), which contains long-chain branching, and from high density polyethylene (HDPE), which has higher crystallinity and lower environmental stress crack resistance. The UV+ designation indicates that ultraviolet stabilizers are pre-compounded into the powder before grinding, rather than supplied as a separate dry-blended masterbatch. BUE 5325 identifies the specific stabilizer and color package, although its exact composition is controlled by the manufacturer and should be verified on the certificate of analysis. Commercial rotational molding LLDPE grades in this density class typically exhibit a melt flow rate determined under ISO 1133-1 at 190 °C and 2.16 kg in the range of 3 g/10 min to 7 g/10 min, and a density determined under ISO 1183-1 at 23 °C in the range of 0.930 g/cm³ to 0.940 g/cm³. Exact values for this specific grade require the manufacturer’s published datasheet or lot-specific analysis.
The comonomer identity influences the short-chain branching distribution and end-use performance. Butene-based LLDPE often produces a broader molecular weight distribution and lower puncture resistance than hexene- or octene-based copolymers at equivalent density. Rotational molding grades are frequently selected for a balance of melt flow, low-temperature impact strength, and environmental stress crack resistance. For Icorene 3545 UV+ BUE 5325, the comonomer type, molecular weight distribution, and catalyst platform should be confirmed from the manufacturer’s technical disclosure. If the grade is produced on a Ziegler-Natta catalyst platform, its melt rheology may differ from metallocene LLDPE by exhibiting more shear thinning at rotational molding shear rates and different warpage behavior after cooling. Published data for the specific catalyst configuration of this product is limited outside LyondellBasell technical literature.
What distinguishes pre-compounded UV stabilization from dry-blended UV concentrates in carousel rotational molding?
Pre-compounded stabilization reduces additive concentration drift in field-scale carousel machines. Dry-blended systems can stratify during powder transfer; a UV masterbatch present at 1 wt% to 4 wt% of the charge weight may adhere to hopper walls, discharge lines, or transfer blowers. The resulting parts show uneven weathering performance, with failure occurring first on surfaces that received additive-lean powder. BUE 5325 is supplied as a finished powder with the stabilizer dispersed at the resin producer level before grinding. This shifts the burden of additive dispersion from the rotational molder to the resin supplier and narrows the concentration variability reported on certifications. Accelerated weathering of outdoor rotomolded parts is typically evaluated under ISO 4892-2 xenon arc conditions or ASTM D2565. Retained tensile elongation measured by ASTM D638-14 and carbonyl absorbance measured by infrared spectroscopy are common acceptance criteria. For carbon black-containing formulations, surface gloss loss and chalking are also monitored. The UV+ package is intended for outdoor service applications, but published outdoor weathering data for the exact BUE 5325 formulation may be limited to LyondellBasell technical reports. End-use service life projections should be verified with part-specific Florida or Arizona exposure and the manufacturer’s accelerated weathering correlation.
Powder handling before mold charging requires control of particle size distribution. Rotational molding LLDPE powders are commonly classified by dry sieving; particles above 500 µm can reduce surface finish, while excessive fines below 75 µm reduce dry flow and can bridge in feed systems. Moisture absorption in LLDPE is low, but condensation on cold powder stored below the processing area dew point can produce pinholes and surface roughness. Pallets should be conditioned in the molding area before opening. Once charged into fabricated steel or cast aluminum molds, the powder is heated by conduction through the mold skin while rotating biaxially. Carousel, shuttle, and rock-and-roll machines differ in cycle time, labor, and mold envelope. Carousel machines predominate for high-volume tanks, outdoor furniture, and automotive parts; shuttle machines allow multiple heating and cooling stations for larger agricultural tanks. Peak internal air temperature is the primary process variable. For LLDPE, densification and bubble dissolution generally complete when the internal air temperature reaches 190 °C to 220 °C. Oven set points are commonly 260 °C to 320 °C, depending on wall thickness, mold thermal conductivity, and rotation ratio.
Peak internal air temperature excursions and oxidation induction time in rotomolding ovens
At the end of the heating cycle, the internal air temperature plateaus while polymer melt densifies. Undercooking leaves unmelted powder particles at the inner wall and creates porosity or pinholes; overcooking accelerates oxidative degradation. The outer surface, held against the hot mold skin, experiences a higher heat history than the inner surface. Differential scanning calorimetry under ISO 11357-6 can measure oxidation induction time at 200 °C, and a significant decrease in oxidation induction time after molding indicates depletion of the antioxidant package. On carousel machines, a peak internal air temperature overshoot of 10 °C can cause measurable reductions in impact strength and environmental stress crack resistance for some LLDPE grades, although the exact sensitivity of Icorene 3545 UV+ BUE 5325 must be confirmed by the manufacturer. Oven residence time after peak internal air temperature should therefore be minimized but not shortened below the time required for bubble removal. Mold surface temperature is not an adequate control variable because the internal air is the slowest heat-transfer medium. Process engineers record peak internal air temperature, dwell time, cooling rate, and part weight to maintain consistency. Wall thickness variations above 15 % from nominal often indicate mold imbalance, incorrect fill ratio, or non-uniform heating. Rotation ratios for many carousel arms are set near 4:1 major-to-minor speed, but the optimal ratio depends on part geometry and powder flow.
| Property | Standard method | Condition |
|---|---|---|
| Melt flow rate | ISO 1133-1 | 190 °C, 2.16 kg |
| Density | ISO 1183-1 | 23 °C |
| Tensile strength at yield | ASTM D638-14 | crosshead speed 50 mm/min |
| Flexural modulus | ISO 178 | 23 °C |
| Environmental stress crack resistance | ASTM D1693-15 | 10 % Igepal CO-630, 50 °C |
| Vicat softening temperature | ISO 306 | method A50 |
| Oxidation induction time | ISO 11357-6 | 200 °C |
| Accelerated weathering | ISO 4892-2 | xenon arc |
| Low-temperature impact strength | ASTM D5628 | dart impact |
Each of these methods reports a material property under defined laboratory conditions. Rotomolded part properties are anisotropic and cooling-rate dependent; therefore, datasheet values do not directly translate to complex-shaped articles. Sample plaques should be cut from flat areas of rotomolded tanks or boxes, not injection molded specimens, when verifying production quality. Cooling rate differences alter crystallinity: fast air or water-assisted cooling reduces crystallinity and improves impact strength, while slow air cooling increases modulus and can increase warpage. Industrial airflow control inside the cooling station, including fans and water mist, changes part dimensions and residual stress distribution.
| Material family | Density range | Flexural modulus range | ESCR behavior | Warpage tendency |
|---|---|---|---|---|
| LLDPE rotational molding grades | 0.930 g/cm³ to 0.940 g/cm³ | 400 MPa to 700 MPa | higher than HDPE | lower than HDPE |
| LDPE rotational molding grades | 0.918 g/cm³ to 0.925 g/cm³ | 200 MPa to 350 MPa | moderate | lower |
| HDPE rotational molding grades | 0.940 g/cm³ to 0.965 g/cm³ | 800 MPa to 1200 MPa | lower than LLDPE | higher |
The values in the table are generic published property windows for rotational molding polyethylene families. They are not a substitute for the certificate of analysis for Icorene 3545 UV+ BUE 5325. The product is differentiated from unstabilized LLDPE rotational molding grades by the pre-compounded UV+ package. Dry-blended systems rely on the molder to achieve uniform additive distribution, whereas the BUE 5325 formulation is intended to deliver stabilizer and colorant dispersion from the resin producer. If the BUE 5325 package includes carbon black, the pigment also provides ultraviolet screening and opacity, but carbon black loading must remain low enough to avoid measurable reductions in tensile elongation and low-temperature impact. Black UV-stabilized LLDPE powders can absorb furnace radiation differently than natural grades, causing faster surface heating at the same oven set point. The oven controller should use internal air temperature rather than a fixed cycle time when switching from natural to black formulations.
Compared with LDPE rotational molding resins, the linear low density structure provides higher stiffness and environmental stress crack resistance at comparable wall thickness. Compared with HDPE rotational molding resins, the lower crystallinity of LLDPE reduces modulus and heat deflection temperature but improves stress crack resistance and low-temperature impact behavior. These differences influence tank design, agricultural spraying equipment, outdoor recreational parts, marine buoys, and industrial housings where impact loading and weathering exposure drive material selection. Chemical compatibility should be assessed for the specific contact fluid. LLDPE has resistance to many aqueous acids, alkalis, and polar solvents at ambient temperature but is swollen by aliphatic and aromatic hydrocarbons. Environmental stress crack resistance measured by ASTM D1693-15 in 10 % Igepal CO-630 at 50 °C is a screening test for detergent and surfactant exposure. For outdoor service, the main degradation pathway is photo-oxidative chain scission, not hydrolysis. The UV+ package retards carbonyl formation and retained tensile elongation loss, but it does not prevent changes in surface gloss or color. Black formulations typically show lower visible color shift than white or natural stabilized grades under xenon arc exposure. Parts exposed to continuous hot water above 60 °C may require additional stabilization beyond standard UV packages because combined heat and ultraviolet exposure accelerates antioxidant depletion.
Regulatory compliance for the base LLDPE is typically addressed under FDA 21 CFR 177.1520 for food-contact applications, provided the grade meets extractable limits and end-use restrictions. The colorant and UV stabilizer package in BUE 5325 may be subject to separate food-contact approval; suppliers should provide 21 CFR 178.2010 or EU Regulation 10/2011 compliance statements when applicable. RoHS Directive 2011/65/EU restricts lead, cadmium, mercury, hexavalent chromium, and certain phthalates; a certificate of conformity is required from the supplier for specific lots. REACH registration for polymer substances is generally exempt provided the monomer units are registered, but imported formulations must meet SVHC information obligations under Article 33. Occupational exposure controls during rotational molding should include ventilation to remove low levels of ethylene oligomers and antioxidant degradation products released during over-temperature events. Atmospheric monitoring for total volatile organic compounds is recommended when oven temperatures exceed 300 °C.
Field-scale processing on shuttle machines has shown that black UV-stabilized LLDPE powders can develop side-to-side wall thickness variation when mold rotation is unbalanced. A major-to-minor rotation ratio near 4:1 is common, but asymmetric parts may require ratio adjustment. Mold release selection also affects surface appearance and post-mold painting. Reactive or silicone-based release chemistries should be evaluated for compatibility with the UV stabilizer package, because some release agents can interfere with surface cure or long-term adhesion of coatings. Avoid blending the powder with amine-based additives or copper-containing materials that accelerate thermo-oxidative degradation. Pre-drying is not normally required unless surface condensation occurs after storage below the processing area dew point. Powder temperatures below 10 °C can cause mold surface condensation and pinholes in thin-wall parts. A rotational molder substituting this material from a dry-blended UV system should compare dry-flow bulk density and fines content, because pre-compounded additive packages can alter powder flow through carousel dosing equipment and affect part weight consistency.
