Conventus Polymers UHMWPE 100
- Product Name: Conventus Polymers UHMWPE 100
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
- CONTACT NOW
- Conventus Polymers UHMWPE 100 is typically used in formulations when tribological properties and service temperature and load limits must be controlled within specific ranges.
| HS Code | 626887 |
| Material Type | Ultra High Molecular Weight Polyethylene (UHMWPE) |
| Density | 0.930 g/cm3 |
| Water Absorption | 0.010 % |
| Tensile Strength Yield | 3.20 ksi |
| Tensile Strength Break | 5.80 ksi |
| Elongation At Break | 350 % |
| Tensile Modulus | 116 ksi |
| Flexural Modulus | 116 ksi |
| Izod Impact Unnotched | No Break |
| Melting Point | 135 °C |
| Maximum Continuous Service Temperature | 80 °C |
| Thermal Expansion | 1.30E-4 cm/cm/°C |
| Dielectric Strength | 900 V/mil |
| Volume Resistivity | 1E15 ohm-cm |
As an accredited Conventus Polymers UHMWPE 100 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Conventus Polymers UHMWPE 100 typically comes in 25 kg moisture-resistant bags, palletized, and shrink-wrapped for secure industrial shipping. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Conventus Polymers UHMWPE 100 in 25 kg bags, palletized, stretch-wrapped, and secured for ocean shipment. |
| Shipping | Conventus Polymers UHMWPE 100 is typically a non-hazardous polyethylene resin, not regulated for transport by DOT, IMDG, or IATA. Ship in moisture-resistant bags, boxes, or bulk containers on pallets. Keep dry, cool, and away from UV. Follow the SDS and local rules. No UN number, hazard class, or packing group required. |
| Storage | Store Conventus Polymers UHMWPE 100 in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, and strong oxidizing agents. Keep containers sealed, labeled, and off the floor. Protect from moisture, dust, and UV exposure. Use original packaging on pallets, avoid excessive stacking, and maintain good housekeeping to prevent pellet spills. Follow the SDS and local regulations. |
| Shelf Life | Stable under normal storage conditions; no defined shelf life when kept cool, dry, protected from UV light and contamination. |
A wet-process lithium-ion separator line running Conventus Polymers UHMWPE 100 as the polyolefin matrix typically charges the resin at 15–30 wt% with a liquid paraffin plasticizer at 70–85 wt% and, where required, a small fraction of inorganic particulate or antioxidant not exceeding 2.0 wt%. The compound is mixed in a co-rotating twin-screw extruder with an L/D ratio of 52–60, using barrel zones between 160°C and 220°C, followed by a gear pump and a slit die feeding a chilled casting roll. The cast gel film, commonly 800–2500 µm thick, is stretched biaxially at 90–130°C with machine-direction draw ratios of 5–8× and transverse-direction draw ratios of 4–7×. Extraction with n-hexane or dichloromethane at 25–40°C removes the plasticizer, after which heat setting at 110–135°C stabilizes pore geometry. The resulting membrane typically exhibits pore sizes of 0.03–0.1 µm, porosity of 38–45%, and Gurley values in the range of 200–500 s/100 mL. The UHMWPE matrix also provides thermal shutdown behavior as pores collapse near 130–140°C. Process control is constrained at both ends: barrel temperatures above 220°C accelerate thermo-oxidative degradation of the ultra-high molecular weight fraction, while insufficient plasticizer miscibility below 160°C produces gel-phase discontinuity and pinhole defects. Battery cell qualification for such separator films is commonly referenced to IEC 62660-3 or UL 1642, although those standards apply at cell level rather than to the membrane alone. Published data for Conventus Polymers UHMWPE 100 in this specific separator configuration is limited; line trials are necessary to define the narrow temperature and draw-rate window that avoids melt fracture and maintains a stable β-form lamellar structure.
What Process Limits Govern Gel Spinning of UHMWPE 100 into High-Tenacity Filament?
For gel-spun high-tenacity filament, Conventus Polymers UHMWPE 100 is dissolved in decahydronaphthalene or white mineral oil at 130–150°C, with polymer concentration maintained between 5 wt% and 10 wt% to balance solution viscosity against gel strength. Dissolution is carried out under nitrogen blanketing because oxygen levels above 10 ppm in the headspace reduce final filament toughness. The solution is fed through a spin pump at 10–20 MPa to a spinneret with capillary diameters of 0.8–1.5 mm, an air gap of 10–25 mm, and quench water at 5–20°C. The as-spun gel fiber is extracted with n-hexane or trichloroethylene, then hot-drawn in two stages: the first at 120–140°C with a draw ratio of 20–40×, and the second at 140–150°C to reach total draw ratios of 80–150×. Filaments produced under these conditions typically achieve tenacity of 2.5–3.5 GPa and tensile modulus of 90–140 GPa. Cut-resistant gloves made from the filament are tested against ISO 13997, ballistic panels against NIJ 0101.06, and marine ropes against ISO 9554. The principal process limit is solution gelation heterogeneity: if dissolution drops below 130°C, entanglement density varies across the spun fiber and produces weak points after drawing. At the other boundary, residence times above 90 min at 150°C increase chain scission. Converters should note that published data for Conventus Polymers UHMWPE 100 in gel spinning is limited; pilot-scale solution rheology and air-gap drawing performance must be generated before commercial extrusion.
Sintered Porous Structures and Air Diffusion Media
Powder compaction of Conventus Polymers UHMWPE 100 into porous sheets, tubes, and discs starts with virgin powder screened to a mean particle size of 100–250 µm, or 250–500 µm when coarser pore networks are required. The powder is loaded into a hydraulic compression press and compacted at 5–10 MPa, then sintered at 190–210°C with a soak time of 10–20 min/mm of section thickness. Cooling follows a controlled ramp of 1–3°C/min to prevent differential shrinkage and warpage in thick sections. The sintered body retains porosity between 30% and 45%, with mean pore diameters from 5 µm to 80 µm depending on particle size distribution and compaction pressure. Terminal components include wastewater aeration diffusers, pneumatic silencers, laboratory filter discs, fluidized-bed distributor plates, and vent elements for chemical storage tanks. Molded UHMWPE parts of this type are covered by ISO 11542-2 for material classification and preparation of test specimens; food-contact variants fall under FDA 21 CFR 177.1520 and EU Regulation 10/2011 where migration testing is required. Sintering control is the critical threshold: temperatures above 210°C cause surface melt flow that seals surface pores and lowers permeability, while temperatures below 190°C produce insufficient particle coalescence and low burst strength. Compression pressures above 10 MPa collapse interparticle voids and reduce porosity below the target range. The process is therefore constrained to a narrow thermal window, and platen temperature uniformity should be held within ±3°C to avoid batch-to-batch permeability drift.
Compression molding of implantable preforms from Conventus Polymers UHMWPE 100 requires a separate qualification path from conventional industrial molding. The resin is not presumptively implantable; converters must secure lot-specific traceability and demonstrate compliance with ISO 5834-2 and ASTM F648 before any machined bearing component is released. Powder consolidation typically uses pressure of 10–20 MPa at 190–210°C, with hold times of 20–40 min for thick blocks and cooling rates no greater than 5°C/min to minimize fusion defects and residual stress. Ram-extruded rods of 30–80 mm diameter are also converted into acetabular cups, tibial inserts, and patellar buttons by CNC machining. Where crosslinking is specified, the machined preform is exposed to gamma radiation at 50–100 kGy, followed by remelting near 150°C to reduce free radicals and improve oxidation resistance. Oxidation index is measured according to ASTM F2102, with aged components generally required to remain below an oxidation index of 1.0. Calcium stearate, which is common in some general-purpose UHMWPE grades, is not acceptable in this application because it has been associated with elevated oxidation after irradiation. If Conventus Polymers UHMWPE 100 is not supplied with ASTM F648 lot certification and implantable-grade packaging, the material cannot be used in finished orthopedic bearings. Even with compliant input resin, each consolidation batch must be verified against the mechanical minima of ASTM F648 rather than relying on generic UHMWPE property values.
Conveyor Wear Strip Extrusion Demands Low Compression Ratios and Precise Barrel Cooling
UHMWPE 100 exhibits extremely high melt viscosity, which makes single-screw profile extrusion sensitive to screw design and thermal control. Wear strip and chain guide extrusion typically uses a single-screw extruder with an L/D ratio of 24–30 and compression ratio limited to 1:1–2.5:1; higher compression ratios generate excessive shear heating and melt fracture. Barrel zones are set from 180°C to 230°C, with die temperature held at 200–220°C. The die land length is maintained at 10–20× the finished profile thickness to reduce sharkskin and slip-stick at the die exit. External lubrication is commonly introduced as a silicone masterbatch at 2–3 wt%; addition above 3 wt% has been observed in pilot-scale trials to reduce tensile yield by 5–10% and weaken weld lines in co-extruded profiles. Extruded wear strips, rail liners, and chain guides are tested for tensile properties according to ASTM D638, with typical UHMWPE homopolymer values of 21–24 MPa yield strength and 300–450% elongation at break. Hardness measured under ASTM D2240 typically falls within 62–68 Shore D. Barrel temperatures above 230°C initiate oxidative degradation, visible as yellowing and reduced impact strength, while temperatures below 180°C raise melt pressure and can stop the screw. The process window is therefore unusually narrow, and direct-drive extruders with tightly zoned air-cooled barrels are preferred over conventional water-cooled polyolefin lines.
When Food-Contact Chain Guides Require FDA 21 CFR 177.1520 Documentation
For bottling-line chain guides and star wheels manufactured in Europe or North America, neat Conventus Polymers UHMWPE 100 is converted by compression molding or ram extrusion at 190–210°C and 10–15 MPa, followed by cooling at 2–4°C/min to control flatness in thick sections. The material must comply with FDA 21 CFR 177.1520 for olefin polymers and, where applicable, EU Regulation 10/2011. Additives are restricted to food-approved antioxidants at 0.1 wt% or less; external mold release agents are either avoided or replaced by food-grade alternatives that do not compromise migration limits. Finished parts include conveyor chain guides, star wheels, scraper blades, and dairy rail profiles. Operational boundaries are explicit: continuous aqueous food-contact service is limited to 80°C because creep accelerates above that point, while intermittent hot-water washdown at 95°C can produce dimensional change greater than 2% in constrained parts. Steam sterilization at 121°C causes gross distortion and must be avoided. Strong oxidizing sanitizers are incompatible at temperatures above 50°C due to oxidative embrittlement. Migration testing under EN 1186-1 must demonstrate overall migration below 10 mg/dm², and specific migration of any antioxidant package must be reported against the assigned limits in EU Regulation 10/2011. Converters should also maintain batch-level evidence that the raw UHMWPE 100 shipment does not contain recycled content or non-approved slip agents, because food-contact chain guide failures are commonly traced to undocumented rework addition rather than base resin variation.
Competitive Conventus Polymers UHMWPE 100 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!
- Conventus Polymers UHMWPE 100 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.
Conventus Polymers UHMWPE 100 is a virgin ultra-high-molecular-weight polyethylene resin classified as PE-UHMW under ISO 11542-1 and specified primarily by solution viscosity according to ISO 1628-3 rather than by melt mass-flow rate. The product is supplied as a fine powder for ram extrusion, compression moulding, and subsequent machining into sheet, rod, profile, and wear components. Because the viscosity number of this resin class normally exceeds 2000 mL/g, it does not form a stable melt flow under ISO 1133-1:2022; therefore conventional screw extrusion and injection moulding are not applied. Moulded forms exhibit a density of 0.930–0.945 g/cm³ under ASTM D1505, Shore D hardness of 60–66 under ASTM D2240, tensile yield stress of 21–23 MPa under ASTM D638, and water absorption after 24 h of <0.01 % under ASTM D570. The main uses are wear strips, chain guides, star wheels, hopper liners, guide rails, bearing pads, and chute liners in bottling, packaging, food processing, and bulk solids handling. The material is differentiated from standard HDPE by molecular weight, which for UHMWPE is typically reported between 3.0×10⁶ and 6.0×10⁶ g/mol, whereas HDPE ranges from 5×10⁴ to 2.5×10⁵ g/mol. That molar-mass difference reduces abrasive wear and increases notched impact resistance but also removes the injection-moulding process window. The unfilled natural grade is covered by the olefin polymer specification of FDA 21 CFR 177.1520 as a resin class; conformity of a finished component must be verified because machining aids and additives can alter extractives behaviour.
What Distinguishes UHMWPE 100 from HDPE and Reprocessed UHMWPE Grades?
The principal distinction is rheological rather than compositional. HDPE displays a measurable melt mass-flow rate under ISO 1133-1:2022 from 0.1 to 20 g/10 min depending on grade; UHMWPE 100 exhibits no stable flow under the same test because the molecular weight and entanglement density produce viscosities beyond the measurement window. Reprocessed UHMWPE may contain lower-molecular-weight fractions, surface moisture, and contamination that reduce ISO 1628-3 viscosity number below 2000 mL/g, lower notched impact energy, and increase scatter in wear rate. Published data for reprocessed sheet is highly variable and cannot be covered by a single specification. The table below compares representative published values for unfilled UHMWPE, extrusion-grade HDPE, and reprocessed UHMWPE sheet; values for the specific Conventus Polymers UHMWPE 100 lot should be confirmed against the supplied certificate of analysis.
| Property / Test method | Conventus Polymers UHMWPE 100 | HDPE | Reprocessed UHMWPE |
|---|---|---|---|
| Viscosity number, ISO 1628-3 | >2000 mL/g | Not applicable | Often 1200–2000 mL/g |
| Molecular weight, GPC/viscometry | 3.0×10⁶–6.0×10⁶ g/mol | 5×10⁴–2.5×10⁵ g/mol | Highly variable; often below 3.0×10⁶ g/mol |
| Density, ASTM D1505 | 0.930–0.945 g/cm³ | 0.940–0.970 g/cm³ | 0.930–0.950 g/cm³ |
| Tensile yield, ASTM D638 | 21–23 MPa | 23–30 MPa | 18–22 MPa |
| Notched Izod, ASTM D256 | No break at 23 °C | 5–10 kJ/m² | 20–40 kJ/m² |
| Dynamic coefficient of friction, ASTM D1894 | 0.10–0.20 | 0.20–0.35 | 0.15–0.25 |
| Water absorption 24 h, ASTM D570 | <0.01 % | 0.01–0.05 % | <0.02 % |
| Continuous service temperature range | −200 to +80 °C | −40 to +90 °C | −100 to +70 °C |
In practice the absence of a melt-flow process window means that UHMWPE 100 cannot be run in standard injection-moulding machines with reciprocating screw plastication. Reprocessed material often enters the market as low-cost sheet or rod but carries higher void content and lower ASTM D256 notched impact values, which can result in brittle failure on drilled or bolted wear liners. The selection of UHMWPE 100 over HDPE therefore follows from a need for higher abrasion resistance and low-temperature toughness rather than from elevated strength or stiffness.
In high-speed bottling and packaging lines, star wheels and guide rails machined from UHMWPE 100 are used in dry-contact transfer points at line speeds of 20,000 to 60,000 containers per hour. The dimensional stability is supported by the ASTM D570 24-hour water absorption value below 0.01 %, which limits hygroscopic swelling in washdown environments. The dynamic coefficient of friction against steel or polyethylene terephthalate is measured under ASTM D1894 in the range of 0.10–0.20; this permits many guide-rail applications to operate without external lubrication, reducing contamination risk in food-contact zones. Replacement intervals for HDPE star wheels on such lines are sometimes shortened by abrasive wear at the container contact edge; UHMWPE 100 reduces edge rounding and wear-debris generation because its high molar mass increases resistance to micro-cutting and delamination. The same grade is applied as chain-guide profiles in conveyor systems for glass bottles, aluminium cans, and cartons. In these components, machining tolerance is commonly held to ±0.05 mm on guide faces to prevent line jams; post-machining stress relief is necessary where thick sections above 40 mm are machined asymmetrically and flatness tolerances below 0.1 mm/m are specified.
When Component Life Is Governed by Abrasive Wear and Low-Temperature Impact
Chute liners, hopper liners, and slurry-pipe liners are shifted from metal or HDPE to UHMWPE 100 where bulk solids sliding speeds exceed 0.5 m/s or where impact at ambient low temperature causes brittle cracking. In such service the material is not expected to carry continuous tensile stress, but it is exposed to sliding abrasion and repeated impact. The notched Izod value under ASTM D256 remains in the no-break category at 23 °C, and UHMWPE homopolymer retains a significant fraction of its impact resistance at −40 °C; published data for this specific formulation is limited, but the ISO 11542-2 designation system includes PE-UHMW grades intended for low-temperature service. Abrasive wear on chute liners is usually evaluated on site rather than by isolated laboratory coupon testing, because particle size distribution, moisture, and counterface roughness control wear rate. Under ASTM G65 dry-sand rubber-wheel conditions, UHMWPE typically shows lower volume loss than HDPE and steel liners, but the absolute value depends on sand type and wheel loading. The boundary conditions are explicit: continuous operation above 80 °C is not recommended for load-bearing wear parts because creep and oxidation accelerate; contact with concentrated sulfuric acid, nitric acid, or chromic acid at elevated temperature can cause chain scission, discoloration, and surface cracking. Outdoor use of natural UHMWPE 100 without carbon black or an ultraviolet stabiliser leads to surface embrittlement, and in such cases a black modified UHMWPE or a stabilised equivalent should be specified.
Ram extrusion and compression moulding are the two production-scale forming routes for UHMWPE 100. The powder is not plasticised in a twin-screw extruder; instead, compaction and sintering occur in hydraulic presses or reciprocating ram extrusion machines. Compression moulding of sheet and block is performed in presses with platen sizes from 1,200 mm × 2,400 mm to 2,000 mm × 4,000 mm and clamping forces from 2,000 to 10,000 kN. Typical platen temperatures are 200–220 °C, and specific pressure is held at 5–15 MPa for sections of 10–80 mm. Cycle time is controlled by thermal diffusivity and may extend from 2 to 6 h for thick block; ISO 293 defines the compression-moulding procedure for test specimens, and production practice follows the same sintering principle. Ram extrusion lines for rod and profile use a heated barrel and die with barrel zones at 180–200 °C and die lands at 180–200 °C; ram pressure can reach 30–50 MPa depending on cross-section and line speed. Finished forms are commonly stress-relieved prior to final machining because internal thermal stresses can release during drilling or milling and alter flatness.
On production-scale ram extrusion lines, batch-to-batch changes in powder bulk density and particle size distribution can shift consolidation pressure by ±5 %; operators adjust feed-zone temperature and ram stroke to maintain weld-free output. Surface defects on rods are observed when die temperature drops below 175 °C or when ram speed exceeds the thermal soak capacity of the barrel. These are processing boundaries, not material defects, and they define the practical diameter range for void-free rod, which on many machines is 20–200 mm. Published data for this specific product across all machine configurations is limited; extrusion houses typically qualify each lot by trial runs because UHMWPE does not provide the pressure-transducer feedback used in screw extrusion.
Food-Contact and Potable Water Compliance Matrix
Unfilled natural UHMWPE 100 is classified as an olefin polymer under FDA 21 CFR 177.1520. The permitted conditions of use are derived from 21 CFR 176.170(c), with typical food-contact use falling under conditions E through G unless the finished article is exposed to hot fill above 100 °C. Compliance under European food-contact legislation is assessed under Regulation (EU) No 10/2011, for which the overall migration limit is 10 mg/dm² of contact surface. Potable-water contact may require NSF/ANSI 51 material evaluation; raw-resin classification alone does not confer finished-part certification. The following matrix identifies the relevant instruments and the verification required.
| Standard or regulation | Clause / method | Applies to | Verification boundary |
|---|---|---|---|
| FDA 21 CFR | 177.1520 olefin polymers | Natural UHMWPE homopolymer | Finished article migration under 21 CFR 176.170(c) |
| EU | Regulation (EU) No 10/2011 | Plastics food-contact | Overall migration limit 10 mg/dm² |
| NSF/ANSI | 51 | Food equipment material | Requires formulation review and plant audit |
| REACH | 1907/2006, Article 33 | SVHC notification | 0.1 % w/w threshold in article |
| RoHS | 2011/65/EU, Annex II | Pb, Hg, Cd, Cr(VI), PBB, PBDE | Not normally present in virgin UHMWPE |
These compliance positions apply to the unfilled natural resin; the addition of reprocessed UHMWPE, colourants, lubricants, or metal-detectable fillers changes the regulatory profile. Because machining lubricants and conveyor greases can penetrate the surface layer, finished components should be cleaned and tested when the application is governed by FDA 21 CFR 177.1520 or EU 10/2011.
Pressure-velocity limits shift when counterface roughness exceeds 0.8 µm
Where UHMWPE 100 is used as a dry bearing pad, wear rail, or cam follower, the allowable pressure-velocity product is governed by interface temperature rather than by yield stress alone. For continuous dry sliding against carbon steel with a ground counterface below 0.8 µm Ra, typical pressure-velocity limits for UHMWPE are reported near 0.07 MPa·m/s; above this range, frictional heat can raise surface temperature beyond 80 °C and initiate creep. If the counterface roughness exceeds 0.8 µm Ra, abrasive wear accelerates even at lower pressure-velocity values, because the polymer surface is cut by the harder asperities. In contrast, HDPE bearing pads commonly require lower sliding speeds or external lubrication under the same contact conditions. The design difference is therefore not merely lower friction but a wider dry-running window at low interfacial temperature. Components machined from UHMWPE 100 for such service are often checked for flatness under 0.05 mm/100 mm to avoid local contact stress concentration, which shortens field life on high-cycle conveyor bearings.
