| HS Code | 792602 |
| Density | 0.930 g/cm³ |
| Molecular Weight | 4.5 x 10^6 g/mol |
| Bulk Density | 0.43 g/cm³ |
| Average Particle Size | 150 µm |
| Melting Point | 135 °C |
| Crystallinity | 55% |
| Tensile Modulus | 750 MPa |
| Tensile Strength At Yield | 19 MPa |
| Elongation At Break | 300% |
| Charpy Notched Impact Strength | No break (200 kJ/m²) |
| Abrasion Resistance | 90 mm³ |
| Water Absorption | <0.01% |
| Coefficient Of Friction | 0.15 |
| Thermal Conductivity | 0.42 W/mK |
| Linear Thermal Expansion | 2.0 x 10^-4 /°C |
As an accredited Celanese UHMW-PE 2122-5 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Celanese UHMW-PE 2122-5 is supplied in 25 kg net polyethylene-lined paper bags, palletized and shrink-wrapped for industrial shipment. |
| Container Loading (20′ FCL) | 20′ FCL dry container loaded with non-hazardous, palletized Celanese UHMW-PE 2122-5, shrink-wrapped, strapped, and secured for ocean transport. |
| Shipping | Celanese UHMW-PE 2122-5 is not classified as dangerous goods for transport by DOT, IMDG, IATA, or ADR. Ship in sealed bags, drums, or bulk bags under dry, clean conditions. No UN number, hazard class, or packing group is required. Avoid dust and ignition sources. |
| Storage | Store Celanese UHMW-PE 2122-5 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, flames, and strong oxidizers. Keep containers closed, labeled, and clean. Avoid dust generation and accumulation. Use proper grounding to prevent static discharge. Do not store near food, feed, or incompatible materials. Inspect containers regularly and follow the manufacturer’s SDS and local regulations. |
| Shelf Life | Stable; indefinite shelf life when stored in sealed original packaging in cool, dry, well-ventilated area away from heat and sunlight. |
Celanese UHMW-PE 2122-5 is an ultra-high-molecular-weight polyethylene powder with a typical density of 0.928 g/cm³ (ISO 1183-1:2019). The grade does not exhibit a conventional melt flow rate at 190°C/21.6 kg; instead, supplier certificates report a viscosity number above 2000 cm³/g (ISO 1628-3). The downstream application fields below are limited to sectors in which powder compaction, ram extrusion, gel extrusion, or solvent-assisted microporous film production are the actual manufacturing routes. All addition ratios in this document refer to the total dry-blend mass, and all temperature windows refer to actual stock temperature rather than heater setpoint unless otherwise stated.
In lithium-ion cell manufacturing, the grade is converted into microporous separator film by the wet-process route, not by conventional melt film extrusion. The dry-blend formulation consists of 24–32 wt% 2122-5 powder, 60–68 wt% paraffinic process oil with a kinematic viscosity of 30–70 mm²/s at 40°C, and 2–6 wt% fumed silica. A co-rotating twin-screw extruder with a screw diameter of 25–75 mm and L/D ratio of 36:1 to 48:1 is operated at barrel temperatures of 170–200°C, and a gear pump holds die pressure at 8–15 MPa before the slit die. The cast sheet is cooled on a chill roll at 20–40°C, passed through a tenter frame for simultaneous biaxial stretching at 80–110°C, extracted with n-hexane or methylene chloride to remove 98–99.5% of the process oil, and then thermally set at 110–125°C. Production lines exhibit visible gel specks and pinhole defects when undispersed 2122-5 particles exceed 200 µm or when the melt stock exceeds 210°C; on-line optical inspection is therefore installed immediately after extraction. Compliance for automotive cell components is controlled under IATF 16949:2016, while separator-specific measurements are carried out under ISO 5636-5:2013 for Gurley air permeance, ISO 15901-1:2016 for porosity by mercury intrusion, and ASTM D882-18 for film tensile strength. Shutdown temperature near 130–135°C is determined on a hot-stage impedance cell. The terminal finished product is a 9–16 µm microporous separator with porosity of 40–50%, used in lithium-ion cells for electric vehicle and energy-storage packs.
| Parameter | Range | Controlled variable / measured property |
|---|---|---|
| GUR 2122-5 powder | 24–32 wt% | film porosity 40–50% (ISO 15901-1:2016) |
| Paraffinic process oil | 60–68 wt% | residual oil after extraction below 0.5 wt% |
| Fumed silica | 2–6 wt% | Gurley air permeance 150–300 s/100 mL (ISO 5636-5:2013) |
| Tenter frame stretch ratio | 5×5 to 7×7 | final film thickness 9–16 µm |
A 25–40 mm twin-screw extruder with L/D 40:1 is used when 2122-5 is dissolved in decalin at 130–150°C before gel spinning. The polymer concentration is constrained to 1–5 wt%; above 5 wt%, transfer-line filter blocking becomes frequent, while below 1 wt% the gel filament is too weak for consistent drawing. The solution is metered through a spinneret with 24–120 holes of 0.5–1.0 mm diameter, quenched in water at 10–20°C, and the gel filaments pass through solvent extraction and hot drawing at 120–150°C to a total draw ratio of 30:1 to 60:1. Industrial filament breakage occurs at draw ratios above 45:1 when residual decalin exceeds 0.5 wt%, and spinneret hole blocking appears after solution residence times above 45 min at 140°C. Mechanical property data are generated under ASTM D2256-21 for yarn tenacity and ASTM D885-17 for filament modulus; gel-spun products from this molecular-mass class reach tenacity values of 2.5–3.5 GPa and tensile moduli of 80–120 GPa depending on draw ratio. Compliance for cut-resistant protective gloves is evaluated under EN 388:2016+A1:2018, soft ballistic inserts are tested under NIJ 0101.07, and high-modulus mooring ropes follow ISO 10325-2:2009. The terminal finished product range includes cut-resistant gloves, soft ballistic panels, and high-strength ropes for marine and offshore lifting.
Sintered porous sheets made from 2122-5 are produced by charging the powder into a cold mold at 20–30 MPa, heating to 175–195°C, and holding for 30–60 min before controlled cooling at 0.5–1.5 K/min. The formulation is typically 100% of the powder as supplied; where adsorptive or hydrophilic functionality is required, 2–5 wt% fine activated carbon or silica is blended before compaction. The upper sintering temperature is the critical processing boundary: exceeding 195°C in air reduces tensile elongation of the porous body by more than 30% due to oxidative chain scission, whereas sintering below 170°C produces weak neck formation between powder particles and friable edges. Production equipment includes hydraulic presses with flatness tolerances of ±0.05 mm over 500 mm, and heated platens controlled to ±2°C to avoid center-line porosity gradients. Compliance for food-contact filtration media is covered by FDA 21 CFR 177.1520 and EU 10/2011, with migration testing under EN 1186-1:2002. Pore size distribution is measured by capillary flow porometry under ASTM F316-03, and tensile properties of the sintered sheet are reported under ASTM D638-14. The terminal finished product includes porous filter plates, aeration diffusers, suction box covers, and porous pressure-relief vents used in aqueous and mildly corrosive industrial process streams.
Solid profiles for sliding-contact machine elements are produced by ram extrusion because the viscosity of 2122-5 prevents stable screw metering. The feed is 100% powder; if a separate external release agent is required, 0.1–0.5 wt% calcium stearate is blended, but many lines use the grade as supplied. A reciprocating ram extruder with hydraulic pressure of 20–40 MPa pushes the powder through die land lengths of 60–100 mm at die temperatures of 180–220°C. Throughput is limited to 1–3 m/h for solid rectangular profiles up to 100 mm in cross-section. Production experience shows center voids and die-line splitting when ram speed exceeds 1.5 m/h while the die temperature is below 180°C, and surface burnishing appears when the cooling channel is shorter than 3 m. If the powder has been stored at ambient relative humidity above 60%, a pre-drying step at 80°C for 2 h in a fluid-bed dryer is required to prevent bubble inclusion. Compliance for industrial wear components is based on material certification to ASTM D4020-18; wear behavior is characterized by ASTM G65-16 dry-sand rubber-wheel abrasion; and tensile properties are verified under ISO 527-2:2012. The terminal product types are chain guides, star wheels, wear strips, and guide rails for beverage, packaging, and materials-handling conveyors, where the continuous service temperature does not exceed 80°C.
Compression-molded billets for machined pump impellers, valve seats, and labyrinth seals are produced by filling a cylindrical mold with 2122-5 powder, applying 18–25 MPa, and heating to 190–200°C for a hold time of 10–15 min per 10 mm of wall thickness. The cooling step is conducted under maintained pressure at 0.5–1 K/min; demolding above 60°C produces bowed billets and increases subsequent machining stock removal by 0.5–1.0 mm. Dimensional stability is verified after rough machining and a final annealing cycle at 100–110°C for 2 h. The corrosion-resistant end-use properties are limited to dilute acids, brines, and alkaline cleaner streams; concentrated sulfuric acid above 80% at 50°C is not compatible because oxidative attack reduces the relative viscosity of the molded part. Compliance for pump components follows ISO 5199:2002 for centrifugal pump specification, while material testing uses ASTM D638-14 tensile, ASTM D648-18 heat deflection temperature, and ISO 1183-1:2019 density. The terminal product types include pump impellers, valve seats, seal rings, and guide bushings in chemical process and water treatment service.
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Celanese UHMW-PE 2122-5 is a powdered ultra-high-molecular-weight polyethylene homopolymer supplied with a controlled particle size distribution and a stabilizer/lubricant modification denoted by the -5 suffix. The grade belongs to the GUR 2122 series, for which the viscosity-average molecular weight is specified at 4.5 × 106 g/mol when tested according to ISO 1628-3; density is specified at 0.930 g/cm³ per ISO 1183-1. The material exhibits no measurable melt flow under ISO 1133-1:2022 condition 190 °C/21.6 kg, and is therefore processed by solid-state routes—ram extrusion, compression molding, and sinter molding—rather than conventional screw plastication. Test specimens for mechanical property determination are prepared by compression molding according to ISO 11542-2, because injection molding cannot produce a homogeneous test plaque from this molecular weight range. The -5 suffix denotes a specific additive package that alters powder flow and demolding behavior; exact compositional disclosure is controlled by the supplier technical datasheet and is not fully described in published product literature.
Moisture control is the first processing constraint for 2122-5. At room-temperature storage above 60% RH, the powder can adsorb surface moisture sufficiently to generate steam during heating; the result is internal porosity, surface roughness, and inconsistent fusion at the die wall. Pre-drying in a desiccant dryer at 80 °C for 4 h to a residual moisture level below 0.10 wt% is recommended before ram extrusion. The dryer air dew point should be maintained at or below -20 °C. In bulk sack storage, intermediate drying after the first 24 h of exposure to uncontrolled humidity may be required if the lot certificate indicates moisture above the acceptance limit.
Ram extrusion of the 2122 series is conducted on a reciprocating ram machine with cylinder bore diameters typically between 40 mm and 100 mm, and a heated die having a land-length-to-diameter ratio between 8:1 and 15:1. Barrel temperature set points are ordinarily between 180 °C and 200 °C; die set points are between 200 °C and 220 °C. A die temperature excursion above 230 °C lowers oxidation induction time as measured by ISO 11357-6 and produces yellowing or surface microcracks. A die temperature below 190 °C results in inadequate particle fusion and internal weld lines. The practical die-control band is therefore approximately ±5 °C around the optimized set point; thermocouple placement and PID tuning on the die zones must be verified after die changes because thermal mass changes affect the control response.
Specific extrusion pressure depends on die cross-section and profile; equipment bulletins for high-molecular-weight UHMW-PE grades near 4.5 × 106 g/mol report ram pressures in the range of 25 MPa to 45 MPa at the preform. Lower compaction pressure leads to density gradients in the sintered section; higher pressure increases motor load without improving fusion and may accelerate wear on the ram seals. Output rate is not controlled by screw speed but by cycle time, ram displacement, and cooling rate; for small rods the output is commonly less than 2 m/h, whereas for thick profiles it is below 0.5 m/h. Batch-to-batch changes in bulk density change feed-zone compaction; if bulk density falls below 0.40 g/cm³, the ram stroke must be lengthened to maintain preform mass, otherwise short shots occur.
Dimensional tolerance across the die land is governed by cooling rate and puller speed. Rapid cooling from 220 °C to below 100 °C freezes surface orientation and increases residual stress; subsequent machining can release stress and produce out-of-round conditions. A controlled cooling zone with temperature set points between 80 °C and 100 °C reduces stress gradients. On a production line with a 60 mm cylinder, die thermocouple offsets greater than 3 °C have been observed to increase rod diameter variation by 0.5 mm over a 1 m length; recalibration against a reference thermometer is part of lot changeover.
In solid-state compression molding of thick slabs, 2122-5 is cold-compacted at 10–20 MPa before heating. The mold is heated to 200–210 °C and held for 10–15 min per 10 mm of section thickness, followed by cooling under 10–15 MPa to below 60 °C before ejection to prevent void formation and warpage. Hydraulic presses with clamp force capacities of at least 1,000 kN are used for plates larger than 500 mm × 500 mm; inadequate pressure during cooling produces sink marks and a frosted core visible on machined cross-sections.
Typical industrial applications include hopper liners, chute liners, guide rails, wear strips, chain guides, scraper blades, and star wheels. The selection of 2122-5 over lower-molecular-weight PE in these applications is based on higher viscosity-average molecular weight and lower abrasion loss; comparative wear testing should be performed under ASTM G99 because rank order changes with load and sliding velocity. Published data for this specific configuration is limited.
The primary distinction is molecular weight. Conventional high-density polyethylene grades used in blown film or injection molding have viscosity-average molecular weights below 0.5 × 106 g/mol and measurable melt flow rates under ISO 1133-1. UHMW-PE 2122-5 has a viscosity-average molecular weight of 4.5 × 106 g/mol and does not form a pumpable melt; the melt is a viscoelastic solid that can be compacted and sintered but not screw-extruded. This molecular weight difference changes the wear mechanism in sliding contact: lower-molecular-weight PE flows under load and shows higher wear rates, whereas UHMW-PE resists surface plastic deformation and exhibits lower abrasion loss under ASTM G99 test conditions. However, the ranking is load-dependent; above the compressive yield stress, even UHMW-PE exhibits accelerated creep and wear.
Within the Celanese UHMW-PE portfolio, the 2122 series is positioned as a general-purpose industrial grade. The -5 suffix indicates a specific additive package for powder flow and demolding; grades without the suffix may differ in bulk density, particle size, and additive content. For medical/pharma grades such as GUR 4120 or GUR 4130, change control and regulatory documentation are more restrictive, and a direct substitution cannot be made without comparing lot acceptance criteria, particle size, and residual metals. Published data for the specific 2122-5 formulation is limited; the supplier technical datasheet and raw material certificate should be consulted for exact values.
Because particle size distribution and bulk density govern feed consistency in automatic powder metering, a shift in d50 from 140 µm to 180 µm can alter the ram preform mass by several percent at constant stroke. On production lines with gravimetric feeders, the feed factor is trimmed after each lot change. If the bulk density falls below 0.40 g/cm³, the powder may bridge in hopper throats; vibratory densification or low-shear surge hoppers are used to stabilize discharge. The -5 lubricant modification reduces interparticle friction but does not eliminate electrostatic surface charge; at low humidity below 20% RH, static charge can cause powder build-up on metal feed chutes and dusting around the ram seals. Grounding of all contact surfaces and maintaining the powder at 30–50% RH reduces dusting without exceeding the pre-drying moisture limit.
Typical values for the 2122 series are listed below; grade-specific lot certificates may vary because the -5 suffix carries its own additive specification. Test specimen preparation follows ISO 11542-2.
| Property | Test method | Typical value | Acceptance relevance |
|---|---|---|---|
| Density | ISO 1183-1 | 0.930 g/cm³ | Material identification and batch consistency |
| Viscosity-average molecular weight | ISO 1628-3 | 4.5 × 106 g/mol | Controls abrasion and melt-state immobility |
| Average particle size d50 | ISO 13320 | 140 µm | Feed uniformity and compaction |
| Bulk density | ISO 60 | 0.45 g/cm³ | Hopper fill and ram stroke preform mass |
| Tensile yield stress | ISO 527-2 | 17 MPa | Machined part load capacity |
| Elongation at break | ISO 527-2 | >300% | Ductility after sintering |
| Charpy notched impact strength | ISO 179-1 | no break at 23 °C | Impact tolerance in service |
| Shore D hardness | ISO 868 | 60 | Surface indentation resistance |
| Vicat softening temperature VST/B50 | ISO 306 | 80 °C | Limits continuous service temperature |
| Melting peak temperature | ISO 11357-3 | 133 °C | Sintering and fusion set point |
Because 2122-5 does not exhibit a measurable melt flow rate under ISO 1133-1:2022, lot release protocols rely on viscosity-average molecular weight, particle size distribution, bulk density, and residual moisture. Viscosity-average molecular weight is measured by dilution solution viscometry according to ISO 1628-3 using decahydronaphthalene at 135 °C; a batch outside the specified molecular weight band can alter fusion pressure and wear properties even if density and hardness remain unchanged.
Oxidation induction time under ISO 11357-6 is included in some high-temperature service qualifications; values below the supplier minimum indicate antioxidant depletion or thermal history damage. Residual moisture is determined by loss on drying; acceptance is typically below 0.10 wt%. Lot certificates also report bulk density per ISO 60 and laser diffraction particle size per ISO 13320. For applications requiring food-contact compliance, the base homopolymer may be referenced to FDA 21 CFR 177.1520 and Regulation (EU) 10/2011, but a grade-specific confirmation is required because the -5 additive package must be assessed separately.
For thin profiles produced by sinter molding, the powder is compacted at 5–15 MPa in a cavity and heated above the crystalline melting point. The recommended fusion temperature is 200–220 °C; exposure beyond 240 °C accelerates thermo-oxidative chain scission, and the sintered part loses impact strength. The heating rate is limited by the low thermal conductivity of UHMW-PE; sections thicker than 20 mm require staged heating or prolonged soak to avoid a melted skin over a cold core.
Continuous service temperature for unstabilized UHMW-PE sections is ordinarily limited to below 80 °C under load; higher temperatures produce creep and accelerated oxidation. Intermittent exposure to 100 °C is possible only at low mechanical load and with the supplier’s confirmed antioxidant package. In chemical immersion service, 2122-5 retains the resistance typical of UHMW-PE to dilute acids, alkalis, and salt solutions at temperatures below 60 °C. Strong oxidizing acids, including nitric acid above 20% concentration, and prolonged contact with aromatic solvents above 50 °C are not recommended; swelling reduces hardness and increases creep. For any chemical application, grade-specific chemical resistance data and stress-cracking resistance under ISO 22088 should be reviewed, because the -5 additive may migrate at elevated temperature and alter surface properties.
