Products

UHMWPE

    • Product Name: UHMWPE
    • Chemical Name (IUPAC): poly(ethene)
    • CAS No.: 9002-88-4
    • Chemical Formula: (C₂H₄)ₙ
    • Form/Physical State: Powder
    • Factroy Site: Yushan Island, Gaoting Town, Daishan County, Zhoushan City, Zhejiang Province
    • Price Inquiry: sales3@ascent-chem.com
    • Manufacturer: Zhejiang Petroleum & Chemical Co., Ltd.
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    Specifications

    HS Code

    265086

    Chemicalname Ultra-High-Molecular-Weight Polyethylene
    Abbreviation UHMWPE
    Density 0.930–0.935 g/cm³
    Tensilestrength 40–60 MPa
    Elongationatbreak 300–600%
    Waterabsorption Near zero
    Coefficientoffriction 0.10–0.22
    Meltingpoint 130–136 °C
    Wearresistance Excellent
    Chemicalresistance Outstanding to most chemicals
    Electricalinsulation Excellent
    Hardness Shore D 60–65
    Thermalconductivity 0.41–0.51 W/m·K
    Uvresistance Poor

    As an accredited UHMWPE factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing UHMWPE is typically packaged in 25 kg sturdy polyethylene-lined bags or drums, sealed for moisture protection and clearly labeled for identification.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for UHMWPE typically accommodates about 18-22 metric tons, packed in 25kg bags on pallets, maximizing space efficiency.
    Shipping UHMWPE (Ultra-High Molecular Weight Polyethylene) is shipped as solid pellets, sheets, or fabricated parts, usually in sealed containers or bags to prevent contamination. It is a non-hazardous, stable material under normal transport conditions and does not require special shipping precautions. Store in a dry, cool place away from direct sunlight.
    Storage UHMWPE (Ultra-High-Molecular-Weight Polyethylene) should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat to prevent degradation. Keep it away from strong oxidizing agents. Store in closed containers or original packaging to protect from dust and contamination. Ensure clear labeling and follow all safety and handling guidelines for polymers.
    Shelf Life UHMWPE (Ultra High Molecular Weight Polyethylene) typically has an indefinite shelf life when stored in cool, dry conditions, away from sunlight.
    Application of UHMWPE

    High molecular weight: UHMWPE with high molecular weight is used in orthopedic implants, where superior wear resistance extends implant longevity.

    Low friction coefficient: UHMWPE with low friction coefficient is used in conveyor belt guides, where reduced friction minimizes energy consumption.

    Purity 99.9%: UHMWPE of 99.9% purity is used in semiconductor component manufacture, where ultra-clean surfaces prevent contamination.

    Melting point 135°C: UHMWPE with a melting point of 135°C is used in hot water piping systems, where thermal stability ensures dimensional integrity.

    Particle size <50 µm: UHMWPE with particle size less than 50 µm is used in additive manufacturing powders, where fine particles enable precise 3D printing resolution.

    Viscosity grade 1.2 x 10^6 Pa·s: UHMWPE with viscosity grade 1.2 x 10^6 Pa·s is used in high-strength ropes, where fiber processing yields high tensile strength.

    Stability temperature 80°C: UHMWPE stable at 80°C is used in chemical processing equipment linings, where chemical and thermal stability increases operational safety.

    Crystallinity 85%: UHMWPE with 85% crystallinity is used in bulletproof vests, where high crystallinity contributes to enhanced ballistic protection.

    Elongation at break 400%: UHMWPE with 400% elongation at break is used in flexible marine mooring lines, where high ductility prevents sudden failure.

    Abrasion resistance rating 10x steel: UHMWPE with abrasion resistance rating 10 times that of steel is used in mining chute liners, where increased service life reduces maintenance frequency.

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    Certification & Compliance
    More Introduction

    UHMWPE: Built for Demanding Applications

    UHMWPE, or ultra-high molecular weight polyethylene, carries unique advantages for those of us committed to manufacturing materials that meet practical challenges. Our production teams see firsthand what this polymer achieves in abrasive, corrosive, and high-impact environments. For decades, we've refined our equipment and process steps to consistently deliver UHMWPE resins and shaped products that solve problems—especially where mechanical stress or surface friction quickly wears out alternatives.

    Understanding the Properties—And Why They Matter

    Every batch leaves our facility after passing density and molecular weight checks—not just to meet some technical sheet, but because industrial clients measure performance by downtime, output quality, and maintenance schedules. UHMWPE’s average molecular weight far exceeds comparably priced polymers, which translates directly to its ability to resist cutting, scrapes, and fatigue under repeated stresses. Anyone handling bulk solids—like powders, grains, and ores—knows what a sticking chute or a jammed hopper does to schedules, so our extruded sheets, rods, and profiles cut sticking and sluicing problems down to size.

    In some industries, corrosion is a daily enemy. Acidic and caustic solutions attack most plastics and rubbers. We supply UHMWPE tanks, liners, and piping systems that hold up against such attacks without embrittlement or rapid wear, because polyethylene’s carbon backbone sheds water, salts, and most organic solvents. Over the years, operators let us know when a component fails, and many times, the feedback points back to chemical attack or stress cracking. Learning from these experiences, we tailor resin grades in our plant, add antioxidant stabilizers, and test melt-flow under simulated service. Durable under sunlight too, our black UHMWPE resists UV better than lower-weight grades, owing to carbon black addition—not a trivial difference for agricultural or outdoor storage customers.

    Where UHMWPE Finds Its Place

    Food-handling conveyors, marine fender pads, sliding wear strips, prosthetic medical parts—these keep showing up on our production orders, because few materials combine food contact safety with high abrasion resistance like UHMWPE. In meat and poultry plants, line mechanics clean, reassemble, and sometimes re-cut guides twice a shift. Where lesser grades pit or split, our UHMWPE holds a smooth, low-friction surface, supporting food safety audits and cutting downtime. In ports and water treatment, docks and scraping bars last years under the step and scrape of steel and concrete—our products have turned up in facilities reporting their original liners outlasting cast steel by wide margins.

    Medical customers drive a different standard. Our ultra-pure resin grades undergo tighter filtration and process controls. In knee and hip replacements, the high molecular weight makes a difference in how slow the material wears, with softer ash content and minimal extractables. Project managers trust our control documentation, not just our word; regulatory reviews and multi-year implant studies back up the resin changes we adapted in consultation with device engineers.

    Transport, packaging, mining, pulp and paper facilities—hard to find a sector that hasn’t at least trialed UHMWPE. Because polyethylene doesn’t shatter at low temperatures, operators swap out old, fatigued liners for ours before winter. That’s experience earned—maintenance teams document how frozen material slides easily over our liners, and they share records of reduced belt and screw drive wear when switching from steel to plastic parts.

    Comparing Against Our Other Polyolefin Products

    Most clients ask where UHMWPE stands next to high-density polyethylene (HDPE) and polypropylene. The answer comes down to real-world testing: UHMWPE absorbs more energy before breaking, and stands up longer in high-scuff roles. HDPE, from our experience, works well for rigid containers, piping, and less abrasive service. It’s less expensive and easier to weld, but if wear-out or impact cracks have been a problem, the higher initial cost of UHMWPE pays back through longer service intervals and fewer shutdowns.

    For design engineers, balance matters. UHMWPE won’t carry the temperature load of some engineering plastics—continuous use above 80°C softens it, so we spend time supporting customers in analyzing heat buildup in their process. If they need form stability above those limits, we guide towards specialized polyamides or fluoropolymers, but where slippage, impact, and chemical washdown rule the day, our own UHMWPE gets the call.

    Specification Range and Practical Limitations

    Through our extrusion and compression-molding lines, we issue sheet, rod, and tube stock covering a wide spectrum of diameters and thicknesses. Some buyers look at powder, others at final shapes for direct assembly. Product dimensions match actual use—thinner panels for chute linings, thick bar stock for precision-machined gears, and massive blocks for punch dies or FDA-inspected cutting surfaces. Color choices run from natural translucent to black and blue, important for cleanroom and food usage, where detection and cleanliness matter.

    From every run, we archive quality data. Melt index, density, abrasion loss, tensile strength—all measured as part of our final control. Over the years, we’ve cut out components with mismatched fillers and inconsistent molecular weight. Recipes tweaked for strong weld seams and clean machinability made a difference, especially for large industrial and medical orders. We remain cautious about UHMWPE’s limits: no easy bond with common adhesives, and its chemical resistance also means paint or ink won’t hold fast. Fastening solutions tend toward mechanical, like screwing or bolting. As extrusion and molding shifts grow in size, we scale up tooling, add anti-static additives when customer safety protocols call for it, and maintain dust control requirements for clean applications.

    Working With Industrial Requirements in Mind

    We know engineers ask for traceable certifications, so we keep detailed batch records and cross-reference performance checks against ASTM and ISO norms. Color stability, dielectric breakdown for electric insulators, and leachables testing for food—these play a role daily, because one weak lot or unchecked property can shut down an assembly line or trigger a product recall. Our ongoing reliability testing loops back to the synthesis and resin blending teams, where raw polymerization steps receive careful control. Feedback from drilling and mining customers led to adjustments in sintering temperature profiles, swapping pigment choices for UV or color response, and introducing higher-grade lubricants for particular conveyor designs.

    In packaging lines and automated machines, reduced friction stands out as more than a lab stat. Line teams report how UHMWPE guides and rollers reduce equipment heating, extend belt lifespans, and smooth movement of containers and product. For precision-cutting parts, machinists tell us the low coefficient of friction allows for higher speed and longer cutter lifespans, especially compared to fiber-filled or lower molecular weight choices.

    Environmental and Safety Considerations

    Sustainability questions grew louder in recent years. UHMWPE stands up well to recycling in some applications, though compared to lower-molecular-weight cousins, repeated processing dulls properties faster. Our lines take waste process trimmings and offcuts into secondary goods, mostly destined for less critical industrial liners or shock-absorber blocks. For clients with green procurement protocols, we document the recycled content where possible, and continue working on separation and cleaning methods that don’t degrade physical properties.

    In terms of worker safety, we upgraded ventilation and dust collection based on shop-floor experience with fine particulate produced during sawing, routing, or sanding. Particle exposure, especially with filled or pigmented grades, prompted us to improve PPE standards and review exposure levels. Our health monitoring program, developed with local workplace safety boards, tracks actual worker outcomes rather than just relying on literature values.

    Challenges and How We Meet Them

    No material is universal. Every week, our technical teams work through questions where even UHMWPE reaches limits—like high-pressure steam sterilization, weak load-bearing under point pressures, or severe UV with no carbon black protection. We designed test coupons to quantify impact performance and notch resistance team by team, logging fail modes to avoid repeat issues at the customer site. Often, the optimal solution blends UHMWPE components with metals or other plastics for layered strength or easy inspection.

    Some customers want finer surfaces for low-wear bearing, while others need rougher faces for grip. We developed multiple finishing and texturing methods in our molding rooms, based on feedback from original equipment manufacturers and maintenance teams. Continuous mold monitoring and operator training, not automation alone, allow us to respond to customer reports when a shipment’s finish does not meet expectations.

    Long supply chains, logistics bottlenecks, and fast specification shifts test our planning systems as much as our chemistry. We maintain raw resin buffers and coordinate closely with molding partners to prevent unexpected shortages. Over the years, we built relationships with local and global suppliers for raw materials, giving us flexibility during resin shortages or sudden order spikes.

    Direct Experience Makes the Difference

    Experience shows that the difference between a successful product and a failed trial often comes down to details: how a liner is cut and installed, how a conveyor wears, or how an extruder cools down. Our product support draws from plant visits and hands-on troubleshooting, addressing chipping from improper bolting, heat buckling from oversized panels, or unexpected static discharge in dusty grains. We don’t just drop off a crate and walk away—the feedback loop from field service engineers and equipment operators shapes every change to our resin choices and processing line schedules.

    Multiple times, clients explained their results after swapping from glass-filled nylon or polyacetal. UHMWPE’s slip and resilience stood out in gritty service, resisting deep scoring, and performing where impacts and vibration ruled. We invited customer teams into our workshop, showing how simple changes in fastener design or edge finish improved product life. Those field proofs matter more than just the technical sheet or general industry claims.

    Conclusion: More Than Just a Material

    Ultra-high molecular weight polyethylene earned its status through real-world track records, not just lab tests or marketing. Whether clients seek longer-lasting wear components, food-safe process lines, or chemically robust storage, our direct manufacturing experience keeps showing that careful resin choice, thorough molding, and detailed quality control make a difference. Feedback, adaptation, and a willingness to walk the customer lines—these habits, not shortcuts, keep pushing our UHMWPE offerings forward. As industries shift toward higher output, more demanding environments, and strong sustainability targets, our role grows through collaboration and know-how, not just product sales. Stories from the field, problem-solving at the bench, and a decades-long focus on durability—those remain the heart of what we do in UHMWPE manufacturing.