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Celanese UHMW-PE 4130 C

    • Product Name: Celanese UHMW-PE 4130 C
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
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    Specifications
    HS Code 862152
    Color Black
    Density 0.93 g/cm³
    Molecular Weight 4,000,000 g/mol
    Bulk Density 0.45 g/cm³
    Average Particle Size 150 µm
    Melting Point 130-135 °C
    Crystallinity 45-50%
    Tensile Modulus 700 MPa
    Tensile Strength At Break 20 MPa
    Elongation At Break >300%
    Notched Charpy Impact Strength 150 kJ/m²
    Shore D Hardness 60
    Vicat Softening Temperature 80 °C
    Thermal Conductivity 0.41 W/m·K
    Specific Heat 1.9 kJ/kg·K
    Linear Thermal Expansion 1.5 x 10^-4 /°C
    Water Absorption <0.01%
    Coefficient Of Friction 0.1-0.2
    Abrasion Resistance 100 (relative)
    Volume Resistivity >10^15 Ω·cm
    Dielectric Constant 2.3
    Limiting Oxygen Index 17%
    Ul94 Flammability HB
    Carbon Black Content 2-3%

    As an accredited Celanese UHMW-PE 4130 C factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Celanese UHMW-PE 4130 C comes in 25 kg multiwall paper bags, palletized and shrink-wrapped, with clear industrial labeling for shipping.
    Container Loading (20′ FCL) 20′ FCL loaded with Celanese UHMW-PE 4130 C in 25 kg bags, palletized, shrink-wrapped, and secured for ocean shipment.
    Shipping Celanese UHMW-PE 4130 C ships as a non-hazardous, non-regulated polyethylene powder. Use sealed, moisture-resistant bags or fiber drums. Keep dry, clean, and away from heat, ignition sources, and contamination. No special DOT/IMDG/IATA labels required. Follow the supplier’s SDS and local transport regulations. Handle to avoid dust clouds.
    Storage Store Celanese UHMW-PE 4130 C in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, flames, and strong oxidizers. Keep containers tightly closed. Protect from moisture and contamination. Avoid generating dust; prevent dust accumulation and static discharge. Use clean, compatible packaging. No special temperature control is required under normal conditions. Inspect containers regularly for damage or leaks.
    Shelf Life Two years when stored in original, unopened packaging under cool, dry, well-ventilated conditions, protected from direct sunlight and contaminants.
    Application of Celanese UHMW-PE 4130 C

    Ram Extrusion of Wear-Guide Profiles and Chain Rail Sections

    Celanese UHMW-PE 4130 C powder is charged directly into a reciprocating ram extruder without pelletization because the ultra-high molar mass prevents stable starved feeding in conventional single-screw equipment. The powder is compacted at ambient temperature in the feed throat, then transferred through heated barrel zones set between 180 °C and 220 °C; the die land is held between 195 °C and 230 °C. Under these conditions, the polymer reaches a transient compression-moulded fusion state rather than a freely flowing melt. The formulation is effectively 100 phr virgin UHMW-PE 4130 C; the only permitted internal release additive is calcium stearate at 0.05 phr to 0.20 phr, introduced only when die-face adhesion produces intermittent cavitation on the extrudate surface. No plasticizer, carrier resin, or non-certified recycled powder is used because low-viscosity domains reduce wear life in the finished part. Because the molar mass of 4130 C makes melt flow rate measurement under ISO 1133-1 impractical, the grade is characterized by viscosity number per ISO 1628-3. Compliance for industrial wear parts is anchored to ISO 11542-1 for PE-UHMW material designation and ASTM D4020 for specification of moulded and extruded UHMW-PE. When profiles are used on food and beverage filling lines, the finished component must also meet FDA 21 CFR 177.1520 olefin polymer migration limits and, where applicable, EU 10/2011. Tensile property verification is performed according to ISO 527-2 or ASTM D638 using type IV specimens machined from the profile core. The production line is typically limited to output rates of 0.2 m/h to 1.5 m/h for cross-sections above 40 mm × 40 mm, because heat conduction through the compacted powder bed controls the fusion rate rather than screw speed. Powder stored at relative humidity above 60% should be dried at 80 °C for 2 h to 4 h to prevent steam pores. Terminal products include conveyor chain guides, bottle-handling starwheels, wear strips, slide beds, and guide rail covers for packaging, beverage, and bulk material handling lines.

    Why Does 4130 C Demand Controlled Solution Viscosity in Gel-Spun Fiber Lines?

    Conversion of Celanese UHMW-PE 4130 C into high-tenacity gel-spun fibre begins with dissolution at 4 wt% to 12 wt% polymer in decalin or tetralin, or at 10 wt% to 25 wt% in a paraffin oil system, at temperatures between 130 °C and 150 °C. The solution is homogenized in a twin-screw compounding extruder with an L/D ratio of at least 40:1, passed through a metering pump, and extruded through a multi-hole spinneret into an air gap of 2 mm to 15 mm. The resulting gel fibre is quenched in a cold extraction bath, then hot-drawn to total draw ratios of 30:1 to 60:1. The absence of low-molecular-weight tail fractions in 4130 C is the principal process advantage, because premature chain relaxation in the air gap reduces ultimate tenacity. Antioxidant addition is maintained below 0.2 wt% of solution solids; excess antioxidant lowers drawing efficiency and can exude during solvent extraction. In decalin/tetralin systems, extraction is performed in a countercurrent volatile solvent bath until residual solvent is below 100 ppm; in paraffin oil systems, extraction is followed by controlled thermal removal at 120 °C to 140 °C under reduced pressure. Process temperatures above 180 °C must be avoided because thermo-oxidative chain scission reduces fibre tenacity. Industrial fibre compliance is evaluated under ISO 9554 for rope general specifications, EN 388 for protective gloves, and NIJ 0101.06 for ballistic preforms. Terminal products include cut-resistant glove liners, ballistic textiles, high-modulus mooring ropes, industrial slings, and netting.

    In lithium-ion battery separator coating operations, Celanese UHMW-PE 4130 C functions as a minority rheology modifier and high-temperature melt-integrity additive within ceramic-polymer composite formulations. The powder is co-milled with α-alumina in a polar solvent system, typically N-methyl-2-pyrrolidone or an alternative solvent, using a high-shear dissolver at 3 000 rpm to 5 000 rpm, then dispersed with polyvinylidene fluoride binder and slot-die coated onto a 7 µm to 12 µm polyolefin base film. Addition ratio is typically 5 wt% to 20 wt% of total dry solids for UHMW-PE 4130 C, with ceramic solids at 70 wt% to 85 wt% and binder at 3 wt% to 8 wt%. The coating is dried at 40 °C to 60 °C and calendered at 50 °C to 80 °C under linear loads of 100 N/mm to 300 N/mm. The function of 4130 C is not to create the primary porosity but to broaden the shutdown window and increase melt integrity without forming hard agglomerates. Compliance for separator components is evaluated against IEC 62660-2 thermal abuse and overcharge tests at cell level, while the raw material itself is controlled under REACH and RoHS 2011/65/EU Annex II. Metal contamination in the powder must remain below 10 ppm and moisture below 300 ppm before slurry mixing, because ionic impurities accelerate self-discharge. Published data for 4130 C in this specific composite separator configuration is limited; the addition window should be validated lot-to-lot against D50 particle size and slurry viscosity. Terminal product types include automotive lithium-ion cell separators, energy-storage system separator webs, and heat-resistant separator substrates for high-rate cells.

    When 4130 C Is Sintered Without a Binder for Aeration and Filtration Media

    Sintering of Celanese UHMW-PE 4130 C without a binder relies on particle-boundary diffusion at 150 °C to 200 °C under a mould pressure of 10 MPa to 30 MPa. The powder is pre-compacted in a matched metal mould to a fill ratio between 2:1 and 4:1 based on final thickness, then heated in a circulating-air or oil-heated press. At these temperatures, the outer surfaces of adjacent particles fuse while the inter-particle voids remain open, producing a final porosity of 25% to 50% and a maximum pore diameter typically between 20 µm and 80 µm. Pore size is controlled by the powder fraction and compaction pressure; maximum pore diameter is measured by bubble-point method under ISO 2942 and ASTM E128. Filtration efficiency in liquid service is evaluated with the multipass test according to ISO 16889. For potable or food-contact aeration, the finished porous body must satisfy FDA 21 CFR 177.1520; in European applications, EU 10/2011 migration limits apply. No additional resin, wax, or inorganic filler is introduced; the formulation is 100 phr UHMW-PE 4130 C, although a small amount of food-steam-compatible release spray may be applied to the mould wall. Process limitations are narrow: below 150 °C, incomplete neck formation produces low tensile strength, while above 200 °C pore collapse reduces air permeability below acceptable limits. Terminal products include pneumatic silencers, aeration diffusers, vent membranes, and suction-box cover plates for papermaking and water treatment.

    Forming variableOperating rangeObserved failure when exceeded
    Pre-compaction pressure10–30 MPaWeak sinter necks below range; pore collapse above range
    Sintering temperature150–200 °CIncomplete fusion below range; closed-cell densification above range
    Powder fill ratio2:1–4:1Insufficient final thickness below range; non-uniform density above range
    Cooling rate after sintering≤5 K/minWarpage and dimensional stress above range

    Direct dry-blend modification of HDPE extrusion compounds with Celanese UHMW-PE 4130 C at 10 wt% to 25 wt% is specified for large-bore pressure pipe and chemical tank sheet where environmental stress cracking resistance and abrasion resistance are the governing failure modes. The powder is pre-blended with HDPE granules in a low-speed ploughshare mixer for 5 min to 10 min, then compounded in a twin-screw extruder with an L/D ratio of at least 40:1 and high-shear downstream mixing elements at barrel set points of 190 °C to 230 °C. Because 4130 C raises the zero-shear viscosity of the compound, side-feeding is specified at addition levels above 20 wt%. The compounded material is evaluated by ASTM D1693 for environmental stress crack resistance, ISO 179-1 Charpy impact, and ISO 527-2 tensile; pressure pipe formulations are additionally qualified under ISO 9080 long-term hydrostatic strength. The blend is not used for thin-wall injection moulding or high-speed film lines because the UHMW-PE phase reduces spiral flow length and can create melt instability in narrow gates. Terminal product types include HDPE-UHMW blend pressure pipe, chemical-resistant tank sheet, and conveyor skirtboard material.

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    Certification & Compliance
    More Introduction
    Celanese UHMW-PE 4130 C is supplied as a calcium stearate-modified ultra-high-molecular-weight polyethylene powder for compression moulding and ram extrusion of stock shapes. The 4130 C grade designation identifies a mid-to-high viscosity position in the Celanese UHMW-PE portfolio; the C suffix identifies the calcium stearate-containing powder form used for mould release and acid scavenging. Stock shapes produced from 4130 C are converted into chain guides, wear strips, star wheels, pump wear plates, scraper blades, guide rails, filter plates, and valve seats in bottling, packaging, bulk solids handling, and food-processing equipment. The resin is selected when service conditions include impact loading at sub-zero temperatures, abrasive slurry contact, or sliding contact with steel where external lubrication is not required. In clean dry sliding against polished steel, natural UHMW-PE of this molecular weight range typically shows a kinetic coefficient of friction of 0.10–0.15 in ASTM G99-17 pin-on-disc testing; actual part friction varies with counterface finish, load, speed, and contamination.

    Which Specification Values Govern Lot Acceptance and Design Calculations?

    Lot acceptance for 4130 C is generally controlled by viscosity number, density, bulk density, particle size distribution, moisture content, and visual contamination rather than by every mechanical property in the table below. The values in the table are representative design data obtained on compression-moulded specimens; they should not be interpreted as specification limits. The material can be designated under ISO 11542-2 and conforms to ASTM D4020-18 for ultra-high-molecular-weight polyethylene moulding and extrusion material. The viscosity number of ≥ 2600 ml/g places 4130 C above lower-molecular-weight grades such as 4120 C and below higher-viscosity grades such as 4150 C. This property is the primary lot-acceptance parameter because it correlates with entanglement density and wear life.
    PropertyTest methodRepresentative design value
    DensityISO 1183-10.93 g/cm³
    Bulk densityISO 600.40–0.45 g/cm³
    Viscosity numberISO 1628-3≥ 2600 ml/g
    Viscosity-average molecular massInternal viscosity method≥ 5.0 × 10⁶ g/mol
    Tensile stress at yieldISO 527-2/1B/5020–22 MPa
    Tensile strain at breakISO 527-2/1B/50≥ 300%
    Tensile modulusISO 527-2/1B/50600–700 MPa
    Charpy notched impact strength, 23 °CISO 179-1/1eANo break
    Charpy notched impact strength, −50 °CISO 179-1/1eANo break
    Shore D hardnessISO 86860–65
    Vicat softening temperatureISO 306/A5078–82 °C
    Melting temperatureISO 11357-3130–135 °C
    Water absorptionISO 62< 0.01%
    The absence of a measurable melt flow rate under ISO 1133-1:2022 at 190 °C and 21.6 kg is a defining feature of the grade. The high entanglement density prevents screw plastication and restricts conversion to processes that apply pressure directly to the powder bed.

    The Calcium Stearate Modification Does Not Create a Melt-Processable Grade

    Calcium stearate in the C formulation functions as an internal lubricant, acid scavenger, and mould-release agent. It reduces sticking in compression moulds and improves powder flow consistency, but it does not reduce the molecular entanglement enough for conventional injection moulding or single-screw extrusion. Because calcium stearate can migrate to the outer surface of the formed stock, surfaces intended for adhesive bonding or plasma treatment should be machined and solvent-wiped immediately before bonding. Bond-line contamination from stearate films is a documented cause of reduced lap shear strength in fabricated assemblies; production shops typically use an isopropanol wipe followed by corona or atmospheric plasma treatment when high bond strength is required. Because the zero-shear viscosity remains above 10⁶ Pa·s throughout the thermal processing window, 4130 C is converted by compression moulding or ram extrusion; neither general-purpose single-screw extrusion nor injection moulding is practical. In compression moulding, the powder is cold-pressed at 5–10 MPa, heated to 180–210 °C, soaked for 15–20 min/cm of part thickness, pressed at 8–12 MPa, and cooled under pressure at 5–15 K/min until the core temperature falls below 60 °C. Demoulding above 70 °C can produce shrinkage voids and warpage in sections thicker than 30 mm. On a 300 t compression press, a 40 mm thick slab can require 120–180 min total cycle; cooling under pressure is typically the rate-limiting step. In ram extrusion, barrel zones are set at 190–250 °C and die land temperatures at 180–220 °C; a die land temperature band of ±5 °C is maintained to avoid surface melt defects on the high side and incomplete fusion on the low side. Backpressure in the 25–50 MPa range is common for large-diameter rod. Output is limited by heat transfer through the powder bed. A bulk-density shift of ±0.02 g/cm³ relative to the normal range is sufficient to alter volumetric feeder mass flow and should trigger feeder recalibration. Pre-drying is not generally required because water absorption is below 0.01%, but condensation on cold powder stored below 10 °C can introduce surface defects when charged directly into a warm hopper. Published production-scale optimisation data for this specific grade is limited; machine trials are required to set exact temperatures for individual presses and ram extruders.

    Monitoring Fusion Defects and Residual Stress in Sintered Stock

    Fusion defects in sintered 4130 C stock are commonly detected by ultrasonic inspection or by machining a test surface and examining it for chalky, unmelted powder inclusions. Density gradients between the shell and core can be caused by under-soaking, premature cooling, or non-uniform mold temperature; compression-moulded sheet above 40 mm should be inspected for core density before final machining. Residual stress from non-uniform cooling can produce dimensional drift after machining; one preventive measure is stress relieving at 100–110 °C for 1 h/cm of thickness, followed by slow cooling to 40 °C before final sizing. On ram-extruded rod, intermittent feed and poor powder consolidation can create longitudinal weld lines that appear as rough or fibrous zones after machining. Relative to lower-viscosity GUR 4120 C, the 4130 C grade requires longer soaking and higher ram pressures but typically delivers higher notched impact toughness and improved slurry erosion life. Compared with higher-viscosity GUR 4150 C, 4130 C occupies a middle position in wear service: machining forces are lower, burr formation is reduced, and uniform sintered density is achieved more readily, while wear life in severe abrasive media is generally lower than 4150 C. Published comparative wear data for these exact grades is limited; selection between 4130 C and 4150 C should be confirmed by end-use trials using the actual abrasive medium and counterface material. In sliding contact with polished steel, kinetic coefficient of friction for natural UHMW-PE is typically 0.10–0.15 under clean dry conditions by ASTM G99-17 pin-on-disc testing, but surface roughness, speed, and load shift the measured value outside this range.

    When Dimensional Stability Is Required in Aqueous and Food-Contact Environments

    UHMW-PE absorbs less than 0.01% water and is dimensionally stable in humid and immersed service, but the coefficient of linear thermal expansion is high, approximately 1.5–2.0 × 10⁻⁴ K⁻¹ between 20 °C and 80 °C. Close-tolerance machined parts therefore require clearance calculations that account for thermal expansion; a 100 °C temperature rise on a 500 mm part can produce more than 7.5 mm of linear growth. Continuous service above 80 °C under load is not recommended because creep accelerates. In food-contact applications, the final article must meet 21 CFR 177.1520 and EU Regulation 10/2011, including the overall migration limit of 10 mg/dm². RoHS Directive 2011/65/EU restricts lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE each below 0.1% w/w in homogeneous materials, with cadmium below 0.01% w/w. REACH Regulation (EC) 1907/2006 SVHC requirements are typically satisfied in natural, unmodified form. Contact with strong oxidizing acids such as nitric acid above 50%, halogens, and aromatic hydrocarbons above 50 °C should be excluded from the service envelope. If the part operates in direct sunlight, ultraviolet stabilisation or carbon black addition is required because unfilled natural UHMW-PE will embrittle over time. Machining of compression-moulded or ram-extruded 4130 C stock requires sharp carbide or polycrystalline diamond tooling, high surface speeds, and low feed forces to avoid smearing and frictional melting. Carbide tooling is typically run at surface speeds of 200–500 m/min with low feed per tooth of 0.05–0.15 mm and positive rake angles to reduce frictional heating. Because the material is viscoelastic, generated heat is not dissipated quickly; air blast or flood coolant is used for close-tolerance features. Heavy stock removal can leave residual stresses; stress relieving at 100–110 °C for 1 h/cm of thickness is used where dimensional stability after machining is critical.
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