Celanese UHMW-PE 4150 C
- Product Name: Celanese UHMW-PE 4150 C
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Celanese UHMW-PE 4150 C is typically used in formulations when particle size distribution and bulk density must be controlled within specific ranges.
| HS Code | 315977 |
| Material Type | Ultra-high molecular weight polyethylene |
| Color | Black |
| Density | 0.930 g/cm³ |
| Bulk Density | 0.45 g/cm³ |
| Average Particle Size | 150 µm |
| Molecular Weight | 9.2 × 10^6 g/mol |
| Viscosity Number | 2100 ml/g |
| Tensile Strength At Yield | 17 MPa |
| Tensile Strength At Break | 20 MPa |
| Elongation At Break | 350% |
| Tensile Modulus | 700 MPa |
| Notched Charpy Impact Strength | 100 kJ/m² |
| Shore D Hardness | 62 |
| Ball Indentation Hardness | 35 MPa |
| Vicat Softening Temperature | 80 °C |
| Melting Point | 135 °C |
| Thermal Conductivity | 0.42 W/m·K |
| Coefficient Of Linear Thermal Expansion | 200 µm/m·°C |
| Water Absorption | <0.01% |
| Coefficient Of Friction | 0.15 |
| Dielectric Constant | 2.3 |
| Volume Resistivity | >10^15 Ω·cm |
| Flammability | UL94 HB |
As an accredited Celanese UHMW-PE 4150 C factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Celanese UHMW-PE 4150 C is packaged in 25 kg bags, with 40 bags (1,000 kg) per pallet. |
| Container Loading (20′ FCL) | Celanese UHMW-PE 4150 C is loaded into a 20-foot FCL container, palletized, dry, clean, and securely stowed for safe transport. |
| Shipping | Celanese UHMW-PE 4150 C is a non-hazardous ultra-high molecular weight polyethylene. It is not classified as dangerous for transport by DOT, IATA, or IMDG; no UN number, hazard class, or packing group required. Ship in sealed bags, boxes, or octabins, keep dry, and protect from contamination. |
| Storage | Store Celanese UHMW-PE 4150 C in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, and strong oxidizing agents. Keep containers sealed when not in use to prevent contamination and moisture pickup. Avoid generating or accumulating dust. Use appropriate grounding if handling bulk powders. Follow local regulations and retain original labeling. Protect from physical damage and incompatible materials. |
| Shelf Life | Celanese UHMW-PE 4150 C: Stable indefinitely under normal storage; keep cool, dry, sealed, away from sunlight, heat, moisture, and contaminants. |
Wet-process lithium-ion battery separator lines running Celanese UHMW-PE 4150 C load the powder with paraffin oil at a mass ratio of 1:3 to 1:6 into a co-rotating twin-screw extruder with L/D 48:1. The barrel profile rises from 170 °C at the feed block to 230 °C at the sheet die, and melt residence time is held below 90 s to limit chain scission of the 9.2×10⁶ g/mol molecular weight fraction. Cast gel film of 0.9–1.2 mm is quenched on a chill roll at 15–25 °C, then biaxially stretched at 90–110 °C with longitudinal draw ratios of 5:1 to 8:1 and transverse draw ratios of 4:1 to 7:1. Extraction with n-hexane at 35–45 °C reduces residual oil to below 0.5 wt%, and heat-setting at 120–135 °C for 10–30 s under transverse restraint stabilises the microporous structure. Separator porosity measured by mercury intrusion according to ISO 15901-1:2016 typically falls between 40 % and 45 %, with Gurley air resistance of 150–300 s/100 mL per JIS P 8117 and a MacMullin number of 6–10. Powder moisture above 0.02 wt% before extrusion produces gel defects at the die lip; when ambient relative humidity exceeds 60 %, the powder is desiccant-dried at 80 °C for 4 h. End products include separator membranes for lithium-ion cells in electric vehicle and grid-storage packs.
What Limits Sintered Stock Shape Tolerance When Ram-Extruding 4150 C at 220 °C?
Because the material exhibits no measurable melt mass-flow rate under ISO 1133-1:2022 condition 190 °C/21.6 kg, ram extrusion of Celanese UHMW-PE 4150 C uses reciprocating rams that compact powder at 1.5–2.5 MPa into a heated die zone held at 220–240 °C. For rod diameters of 40–120 mm, ram cycle rates of 0.10–0.35 m/min produce die-land residence times of 5–15 min, sufficient for particle sintering and short enough to avoid surface oxidation. Centreline cavitation voids occur when the ram load drops by more than 8 % during a cycle, typically because of uneven powder feed or die temperature drift; the die land is cooled to 120 °C before exit to restrict void propagation. As-extruded rod requires 2–4 mm machining allowance; post-machined profiles achieve tolerances of ±0.10 mm on a 50 mm diameter. Food-contact conveyor guide rails made from the stock comply with FDA 21 CFR 177.1520 and EU Commission Regulation 10/2011, with overall migration in food simulants not exceeding 60 mg/kg simulant. End products include bottle conveyor wear strips, screw flights, chain guides, and paper machine suction box covers.
Paraffin-oil gel spinning of Celanese UHMW-PE 4150 C at a polymer concentration of 6–10 wt% in a twin-screw dissolver held at 170–190 °C produces an as-spun gel filament that is quenched in a 5–10 °C water bath before extraction. The chilled gel yarn is extracted with n-hexane to reduce oil content below 0.1 wt%, then drawn in two stages at 120–145 °C to a total draw ratio between 30:1 and 65:1. Tensile strength rises nonlinearly above 30:1, reaching 2.5–3.5 GPa strength and 100–130 GPa modulus when measured according to ASTM D885; hot drawing below 120 °C causes fibrillation and surface pilling, while drawing above 150 °C reduces pretension and produces thermal shrinkage exceeding 4 % after 10 min at 150 °C. Cut-resistant glove fabrics using this fibre are tested under EN 388:2016+A1:2018, with couptest index values of 3–5 depending on fabric construction and coating. Continuous service temperature of the finished fibre is limited to 80–100 °C; sustained exposure above 135 °C leads to irreversible chain scission and tensile loss. End products include braided ropes, ballistic panels, cut-resistant apparel, and deepwater mooring ropes.
If porous aeration frits are sintered from 4150 C below 190 °C, dimensional stabilisation depends on cooling under load
Sintering of cylindrical aeration elements for municipal wastewater uses powder sieved to 100–250 µm packed into a mould at a fill density of 0.40–0.55 g/cm³. The mould is heated at 1–3 °C/min to 180–200 °C, held for 15–30 min, then cooled under 0.5–1.0 MPa axial load to 60 °C before demoulding. At sintering temperatures below 190 °C, interparticle neck formation remains incomplete; mean flow pore diameter measured by ASTM F316 typically falls in the 15–40 µm range for this particle-size band, with published data for this specific configuration limited. Conversely, sintering above 200 °C closes the finest pores and reduces oxygen transfer efficiency in fine-bubble diffusers. The sintered frits are qualified for air diffusion service with bubble point testing per ASTM F316, and compressive strength is checked according to ISO 604 at 23±2 °C. The material is not recommended for continuous contact with strong oxidising acids; service pH is limited to 2–12. End products include fine-bubble diffuser tubes, flue-gas desulphurisation spargers, and aquaculture oxygenators.
For bulk solids handling, Celanese UHMW-PE 4150 C sheets of 8–25 mm thickness are compression moulded at 10–15 MPa and 200–210 °C in a daylight press, then machined into hopper liners and chute plates. Sand-slurry abrasion testing under ASTM G75 shows comparative mass loss of UHMW-PE sheet relative to 316 stainless steel of 1:3 to 1:5 under identical impeller conditions, although published data for this specific grade and thickness configuration is limited. Mechanical fastening through slotted holes accommodates a linear thermal expansion coefficient of 1.2×10⁻⁴ K⁻¹; a 10 m liner length operating across a 30 K temperature swing requires 36 mm of expansion allowance. Liners are installed in cement plants, grain silos, and ship holds where material discharge temperature does not exceed 80 °C to avoid creep deformation under load.
Curved wear components in bottling lines require machined blank strategies, not near-net moulding
When bottling lines require curved wear components, compression-moulded Celanese UHMW-PE 4150 C blanks of 40–80 mm thickness are produced at 200–210 °C and 8–12 MPa, then CNC-machined into timing screws, star wheels, and feed scrolls. The high molecular weight fraction prevents melt flow into thin sections, so near-net moulding of undercuts and splines is not practical; stock removal rates of 0.5–1.0 mm/min with sharp carbide or diamond tools maintain bearing journal accuracy of ±0.05 mm. Machined components are vacuum-conditioned at 23±2 °C and 50±5 % RH for 48 h before final inspection to eliminate post-machining creep. Dry sliding wear against PET bottle surfaces is screened on a block-on-ring rig at 0.5 m/s and 2 MPa according to ASTM G137; if published data for the exact geometry is limited, the screening protocol gives comparative friction and wear rankings against other UHMW-PE grades. Components intended for food packaging lines are assessed for compliance with FDA 21 CFR 177.1520 and EU Commission Regulation 10/2011 by food-simulant extraction testing; published data for this specific dry sliding geometry is limited.
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- Celanese UHMW-PE 4150 C 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.
Celanese UHMW-PE 4150 C is a high-viscosity ultra-high-molecular-weight polyethylene homopolymer supplied as a free-flowing powder. The grade is specified for compression-moulded sheet, ram-extruded wear profiles, chain guides, star wheels, scraper blades, and high-abrasion lining systems where low-speed sliding contact and impact loading occur simultaneously. The product designation places the material in the 4150 viscosity class of the GUR series, while the C suffix identifies a calcium-stearate-modified powder variant. Because the material does not produce a measurable melt flow index under ISO 1133-1:2022 conditions of 190 °C and 21.6 kg, lot conformity is established by dilute-solution viscometry under ISO 1628-3, with a nominal viscosity number of 3500 ml/g. Density at 23 °C under ISO 1183-1 is 0.930 g/cm³. Under ASTM D4020, the material meets the classification requirements for ultra-high-molecular-weight polyethylene molding and extrusion materials.
| Property | Standard | Typical value |
|---|---|---|
| Viscosity number | ISO 1628-3 | 3500 ml/g |
| Density at 23 °C | ISO 1183-1 | 0.930 g/cm³ |
| Tensile stress at yield | ISO 527-2 | 21 MPa |
| Elongation at break | ISO 527-2 | > 300% |
| Charpy notched impact, 23 °C | ISO 179-1 | No break |
| Shore D hardness | ISO 868 | 63 |
| Vicat softening temperature | ISO 306/A50 | 79 °C |
| Melting temperature | ISO 11357-3 | 133 °C |
| Water absorption, 24 h | ISO 62 | <0.01% |
| Volume resistivity | IEC 62631-3-1 | >1 × 10^14 Ω·m |
Typical values are not batch-release limits and should not be used for final design without confirmation against the certificate of analysis.
Why Is a Melt Flow Rate Specification Absent from the 4150 C Datasheet?
The absence of a melt flow rate specification is a consequence of chain entanglement. Ultra-high-molecular-weight polyethylene with a viscosity number near 3500 ml/g does not flow as a conventional melt under standard plastication. In ISO 1133-1:2022, the material tends to remain in the barrel as an elastic plug rather than being extruded through the capillary. The appropriate release test is therefore ISO 1628-3, which determines the viscosity number of a dilute solution in decalin at 135 °C. The result provides a batch-level indication of relative molecular weight. This absence of melt flow also defines the processing boundary: 4150 C is not suitable for conventional screw injection molding or single-screw extrusion. Attempts to process high-viscosity UHMW-PE on a standard screw extruder with a screw L/D ratio below 25:1 without forced powder conveying are reported to cause feed-zone bridging, melt plug formation, and high screw torque. The product must instead be processed by compression molding, ram extrusion, or sintering.
Engineers comparing 4150 C against adjacent GUR grades must normalize specimen crystallinity, fusion history, and test surface finish. Under dry-sand abrasive wear testing in accordance with ASTM G65 Procedure A, 4150 C typically exhibits lower volume loss than 4120 and 4130 when all specimens are molded to equivalent density and thermal history. The wear advantage is derived from the higher solution viscosity, which correlates with longer chain segments and greater resistance to microcutting and fatigue crack propagation. However, the ranking reverses if 4150 C is under-consolidated. In production-scale compression molding of 30 mm thick sheet, unbonded powder interfaces remain if the core temperature never reaches the fusion window. A hydraulic daylight press with platen temperature uniformity of ±5 °C is the minimum equipment condition for uniform thickness above 25 mm. A two-stage pressure profile is used: a low-pressure compaction step near 3 MPa allows trapped air to escape, followed by consolidation at 8–10 MPa at 200–210 °C. Dwell time must be sufficient for the core to reach the fusion range; published data for specific thickness-dependent dwell schedules is limited and should be developed by in-process thermocouple verification.
Ram Extrusion and Compression Moulding Boundaries for 4150 C
Ram extrusion with 4150 C is selected for long wear strips and guides that cannot be produced by conventional thermoplastic extrusion. The powder is compacted in a heated die by a reciprocating ram; the resulting profile develops strength through progressive fusion along the die length. Because 4150 C has a higher viscosity number than 4130 and 4120, line speed is generally reduced at equivalent die cross-section to allow deeper thermal penetration. Industrial ram extruders running 4150 C commonly operate with die wall temperatures between 190 °C and 220 °C, while hydraulic compaction pressure is maintained above 20 MPa for solid sections. The material should not be purged through a conventional thermoplastic screw barrel. Compression molding follows the same fusion principle but applies heat and pressure in a batch cycle. Tooling should be robust enough for 8–10 MPa consolidation pressure, and the press should be capable of holding the final thickness during controlled cooling to minimize residual stress. Mold release is assisted by the calcium stearate additive; however, excessive release-agent migration can produce surface haze on polished tooling.
Moisture absorption under ISO 62 is below 0.01%; drying is generally unnecessary in storage areas below 60% relative humidity. If cold powder is moved into a warm processing building and condensation forms, a circulating-air drying step at 80 °C for 2–4 h can be applied before molding. This is an operational precaution, not a standard specification.
When Calcium Stearate Content Influences Demoulding and Electrical Behavior
The C suffix denotes a calcium-stearate-modified powder. In compression molding and ram extrusion, this additive functions as an internal release agent and powder handling aid. The practical effect is a reduction in sticking to heated tooling and more consistent powder flow from hoppers. However, calcium stearate is a polar additive and can alter surface resistivity and some electrical properties when compared with unmodified UHMW-PE grades. For insulating components or parts requiring stable surface resistivity above 1 × 10^12 Ω, lot-specific values should be confirmed rather than assuming equivalence with an unmodified 4150 grade. The additive can also affect food-contact compliance under FDA 21 CFR 177.1520 and European food-contact regulations; the final article must be evaluated for the specific additive use level and migration conditions. Compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006 is product-specific and should be verified against the current Safety Data Sheet and product datasheet.
| Regulatory domain | Reference standard or provision | Evaluation for 4150 C |
|---|---|---|
| UHMW-PE classification | ASTM D4020 | Meets UHMW-PE molding and extrusion material class |
| Heavy metals | RoHS Directive 2011/65/EU | No intentional additions; supplier documentation required |
| European chemical registration | REACH Regulation (EC) No 1907/2006 | Powder as supplied is subject to registration obligations |
| Food contact | FDA 21 CFR 177.1520 | Article-dependent; verify end-use additive limit and migration testing |
Chemical resistance of 4150 C follows the general olefin response: concentrated oxidizing acids, strong chlorine solutions, and aromatic hydrocarbons at elevated temperature may degrade the polymer or cause swelling. Compatibility testing under ASTM D543-21 for the specific fluid and temperature is required before specifying the grade in immersion service. Continuous-service temperature is generally limited to 80 °C under mechanical load; prolonged exposure above 90 °C can result in creep and dimensional change. The product is not intended for adhesive bonding using polar adhesive systems without surface pretreatment such as corona or plasma treatment. Welding of UHMW-PE is possible with hot-gas or butt fusion methods, but the high melt viscosity of 4150 C requires more heat input than lower-molecular-weight grades.
