Polyethylene

    • Product Name: Polyethylene
    • Chemical Name (IUPAC): polyethylene
    • CAS No.: 9002-88-4
    • Chemical Formula: (C2H4)n
    • Form/Physical State: Solid
    • Factroy Site: Linzi District, Zibo City, Shandong Province
    • Price Inquiry: sales4@ascent-chem.com
    • Manufacturer: Sinopec Qilu Petrochemical
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    Specifications

    HS Code

    311908

    Chemical Formula C2H4)n
    Molar Mass 28.05 g/mol (monomer unit)
    Density 0.91–0.97 g/cm³
    Melting Point 105–135 °C
    Boiling Point Decomposes before boiling
    Appearance White or translucent plastic
    Solubility In Water Insoluble
    Glass Transition Temperature -120 °C
    Thermal Conductivity 0.33 W/m·K
    Tensile Strength 8–30 MPa
    Electrical Resistivity 10^15–10^17 Ω·cm
    Flammability Combustible
    Refractive Index 1.51

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

    Packing & Storage
    Packing A 25 kg white, heavy-duty plastic bag labeled "Polyethylene (PE) Resin Pellets," featuring safety information, batch number, and manufacturer’s logo.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for Polyethylene: Typically accommodates 16-25 metric tons, packed in 25 kg bags or jumbo bags, moisture-protected.
    Shipping Polyethylene is typically shipped in the form of pellets, granules, or powder, packaged in moisture-proof bags, bulk containers, or tank trucks. It should be kept dry, protected from heat and direct sunlight, and transported according to standard regulations for non-hazardous materials. Proper labeling and secure storage are essential during shipping.
    Storage Polyethylene should be stored in cool, dry, well-ventilated areas, away from direct sunlight and sources of heat or ignition. It should be kept in tightly sealed containers or bags to prevent contamination. Avoid storing near strong oxidizing agents. Polyethylene is stable under normal conditions, but proper storage helps maintain its quality and prevents degradation or unwanted chemical reactions.
    Shelf Life Polyethylene typically has an indefinite shelf life under proper storage conditions, avoiding excessive heat, sunlight, and exposure to strong oxidizing agents.
    Application of Polyethylene

    High molecular weight: Polyethylene with high molecular weight is used in the production of geomembranes for landfill liners, where it provides exceptional chemical resistance and tensile strength.

    Low density: Polyethylene of low density is used in flexible packaging films, where it delivers superior transparency and sealability.

    High purity (99.8%): Polyethylene with 99.8% purity is utilized in pharmaceutical container manufacturing, where it ensures product safety and regulatory compliance.

    Melt index 2 g/10 min: Polyethylene with a melt index of 2 g/10 min is applied in blow molding processes for bottle production, where it allows for optimal processing efficiency and wall thickness uniformity.

    Crystallinity 65%: Polyethylene with 65% crystallinity is used in insulation for electrical cables, where it enhances dielectric strength and thermal stability.

    Particle size <500 microns: Polyethylene with particle size less than 500 microns is used in rotational molding for tanks, where it achieves uniform fusion and high impact resistance.

    Stabilized for 120°C: Polyethylene stabilized for 120°C is applied in hot-water piping systems, where it extends service life and dimensional stability under elevated temperatures.

    UV stabilized: Polyethylene with UV stabilization is used in agricultural greenhouse films, where it delivers prolonged weathering resistance and light transmission.

    Antistatic grade: Polyethylene of antistatic grade is utilized in electronic device packaging, where it minimizes static discharge and protects sensitive components.

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    Certification & Compliance
    More Introduction

    Polyethylene: Trust Built on Reliable Chemistry

    Proudly Produced With Years of Hands-On Experience

    At our plant, every bag of polyethylene reflects practical know-how. We have been working with high-density (HDPE), low-density (LDPE), and linear low-density polyethylene (LLDPE) since the start of our first production line. Each grade carries a track record not only in specifications but also in performance history, which end-users value across packaging, construction, healthcare, and consumer goods. Operators, blending teams, engineers—they all rely on polymer that isn’t just technically on point, but behaves the way you expect when pressure is on and cycle times count.

    HDPE: Reliability and Strength Where It Counts

    Our high-density polyethylene stands out for its strength and resistance to stress cracking. Fabricators come back to HDPE resin for blow molding bottles, producing robust storage containers, and piping that needs longevity outdoors or underground. Consistent molecular weight distribution prevents warping, shrinkage, and failures in welding or extrusion. From drum manufacturing to geomembrane liners, customers ask for our model numbers that have proven themselves over thousands of tons, because unplanned downtime or batch rejection eats up more than any savings from cutting corners.

    Factories using our HDPE have particular appreciation for the way it processes at scale. Pellet flow is smooth, dust is low, and melt strength stays high enough for intricate mold shapes or heavy wall sections. We run real-world stress and impact testing on every production lot ourselves, not just as part of a checkbox exercise. That diligence shows up when a pipe holds pressure for decades in the ground, or a film wrap holds up under sudden loads in a warehouse.

    LDPE: Flexibility For Bags, Film, And Beyond

    Low-density polyethylene remains a go-to for films and coatings where clarity and stretch are necessary. With food packaging, garment bags, shrink wrap, and coatings on paper cartons, processors depend on a resin that delivers tough seals and strong puncture resistance at the seal edge. LDPE’s flexible backbone means smooth extrusion for both blown and cast films—with fewer production stoppages. Thicker or thinner films draw cleanly from our pellets, maintaining shine and softness even at lower gauges.

    In our experience, good LDPE isn’t all about technical numbers. Day-to-day shop floor feedback matters: easy pellet feed, reduced dust, consistency in drawdown speed, a reliable balance of slip and anti-block properties, and clear gauge control. These keep rolls tight and delivery on time. Our operators and technicians know these hands-on details keep customers loyal.

    LLDPE: Processing Versatility for Challenging Applications

    Linear low-density options cover a huge processing window between toughness and flexibility. Our LLDPE lines focus on giving packagers tight control over puncture resistance, impact strength, and stretch without trading off machinability. Agricultural films, heavy-duty sacks, stretch wrap, and specialty blends use LLDPE for that reason—especially where thickness needs to come down but reliability can’t budge. We field test our batches beyond the lab, working with actual processors to dial in environmental stress crack resistance and film toughness to match application demands, whether it’s a greenhouse covering or an industrial liner.

    No two orders are ever identical. Processors in blown film extrusion have different slip or antistatic needs than those making cable jacketing or flexible tubing. We tailor slip and processing aids to make sure material handles well not just in our silo, but on our customers’ lines. Problems like gel formation or sharkskin defects during film blowing can disrupt a whole day’s work. We test for these issues, taking action in batching and twin-screw compounding right here on site—so clients can run full shifts without drama.

    Specification and Performance: Straightforward Truths

    Each grade we produce follows a documented formula in copolymer choice, branching, density, and melt index. We back up every shipment with traceable batch records, allowing processors to trace lots to exact reactor conditions on a given shift. We do not offer hypothetical data. All numbers come from our own routine on-site QC, reviewed with third-party labs for cross-checking. Our specs aren’t just printed—maintenance logs, downtime records, and yield charts track how particular blends behaved before they left our warehouse.

    Processors look for melt indices suitable for their machines—lower for pipe or blow molding, higher for fast film lines. They demand low gel counts, minimum black specs, and stable pellet quality order after order. This attention to detail pays off where it matters—no unplanned shutdowns for plugging, no costly scrap. We invite long-time users to the line to see extrusion runs and ask tough questions. Being transparent with practical data, not just brochure specs, gives buyers confidence and helps facilities run at top capacity.

    Practical Differences From Other Polymer Types

    Polyethylene’s distinct advantages come from its balance of simple processability, chemical resistance, and customizable mechanical properties. Compared to polypropylene, polyethylene tolerates colder climates and remains more ductile at low temperatures. For flexible packaging, LDPE and LLDPE can stretch and recover, while HDPE’s higher crystallinity holds structural integrity in heavy-use products.

    PVC, though tougher in some uses, brings more handling challenges: migration of plasticizers and more complex compounding. Polycarbonate makes for impact-tough parts but pulls a far higher price and can yellow with UV exposure. In wire and cable insulation, polyethylene provides clean melt flow and electrical insulation reliability with less brittleness over time, reducing maintenance headaches for cabling companies.

    Nothing replaces hands-on experience with hundreds of real-world applications. In bottling lines, for example, HDPE’s natural stress crack resistance helps keep bottles intact under drop and stacking stress, where other resins crack or go brittle. For sealed food packaging, only a narrow melt range and strong heat seal can keep contamination out—and polyethylene, when formulated to our standards, hits that mark batch after batch.

    Continuous Improvement: Listening to the Real Experts

    We move beyond textbook formulation by learning from people who run the lines and deliver finished products. Feedback loops from compounders, extruder operators, and mold designers fuel the way we adapt recipes and drive innovations. Sometimes, a new additive or catalyst system cuts cycle time or improves yield by a small margin; sometimes, a production note about pellet handling sparks a new quality check.

    Downstream labs and field techs judge products by results, not marketing. If a batch of LLDPE supports thinner agricultural film without sacrificing tear strength, that’s an edge both in material use and customer satisfaction. Helping a flexible packaging converter dial in slip to prevent roll blocking—without excess resin waste—not only saves money but improves shelf performance in the retailer’s hands.

    Maintaining high environmental and ethical standards goes well beyond compliance. We track all critical control points—reactor temperatures, catalyst feed rates, pressure swings, contamination checks—every hour of every production day. Customers see the difference in the reliability of the film, bottle, and fabricated parts they deliver to major brands, retailers, and export markets.

    End-Use Scenarios: Real Feedback, Real Results

    End users specify our polyethylene for everything from milk jugs and chemical drums to irrigation lines and silage films. Municipalities ask local pipe extruders whether resin can withstand freezing cycles year after year. Producers of cling film and wrap expect not just stretch, but reliable cold sealing and tear resistance right from the shelf. Hospitals using disposable syringes and labware count on resin that meets strict process cleanliness—traceable all the way back to original feedstocks.

    Industrial customers provide the toughest tests. In high-stress packaging environments, films must not split on automatic wrappers—every break means lost time. Our technical team often visits conversion plants to monitor real production runs, bringing field samples to the in-house lab for micro-analysis and breakage stress checks. Those visits reveal if pigment carriers or slip agents are performing under commercial drying, sterilization, or UV exposure. Nothing beats seeing material perform outside the lab in the real world.

    Retailers and logistics chains depend on shipping sacks that stay sealed during rough transport. For geotextiles and landfill liners, our specialty HDPE grades have held up under field testing through acidic, basic, and saline conditions. Agricultural users, who store feed and silage for months, demand film that withstands puncture, sunlight, and animal contact without breakdown. Our sales engineers work with farm co-ops and contractors to solve those challenges batch by batch.

    Transparency and Traceability: Trust Comes From Details

    We treat transparency and traceability as fundamental. Each kilo of polyethylene can be tracked from raw feedstock purchase to finished packaged product. Batch numbers on every shipment allow downstream processors, recyclers, and brand owners to review exact QC test records, including melt flow, ash content, mechanical profiles, color checks, and contamination control points. No batch ships out without a review by both plant operators and independent inspection.

    We invite periodic audits by outside partners, including big-brand customers and technical associations, to verify the performance and compliance of our production. Their insight keeps sharp eyes on trends and helps us address early signs of quality drift. Every reported non-conformance, no matter how rare, becomes a case study for improving line protocols or maintenance scheduling. Nothing matters more than having direct connections from our process floor to a converted finished product on the market shelf.

    Commitment to Sustainable Production

    Over the past decade, we have invested in closed-loop water systems, process heat recovery, and emissions reduction technology on-site. By maximizing throughput on extruders and reducing batch-off waste, we continuously bring down the laboratory and plant’s environmental impact. Trials with post-consumer recycled (PCR) polyethylene and biobased catalysts are ongoing, with feedback solicited from local converters and circular economy partners.

    Customers expect real commitments, not just claims. We publish updated reports on scrap recovery rates, energy input per ton of resin, and water usage annually. By working closely with packaging companies that focus on recyclability, our partnership delivers not just resin, but solutions for today’s regulatory and consumer expectations around waste management. We actively share what works—and what proves a dead end in practice—with all stakeholders.

    Challenges and the Road Ahead

    Competition continues to drive innovation, but quality is non-negotiable. The market has seen surges of “off-spec” resin sold at steep discounts, often leading to costly line breakdowns or downstream failures. We never cut corners on formulation accuracy or QC screening, which means our grades may not always be the cheapest up front. Our approach pays off for those whose primary cost is not resin, but lost time or rejected goods when something fails.

    Rising expectations for cleaner, greener plastics bring opportunities as well as real challenges. Biodegradable alternatives often can’t deliver the same properties and process reliability yet. Our R&D team tests new catalyst technologies, exploring ways to lower polymerization temperatures, enable chemical recycling, and boost compatibility with recycled content. Each innovation is field tested at scale—not just in a pilot reactor.

    Many sectors now expect near-real-time digital tracking of resin lots from source to finished product. We meet this demand by investing in digital batch and process monitoring systems, allowing customers to log in and track their orders, shipments, and QC data. This level of integration saves them time and helps prevent supply chain surprises.

    Listening, Adapting, and Delivering What Matters

    Working as a direct manufacturer brings both responsibility and privilege. We respond to requests not from a generic contact form, but through conversations—with engineers, plant managers, procurement teams, and even forklift drivers on the shop floor. They tell us what worked, what struggled, and where the resin helped them make payroll, fill a critical order, or earn a new customer. These stories push us to refine our process, maintain quality accountability, and remain flexible to changing application needs.

    Polyethylene plays a vital role in modern life, from safe food delivery and reliable piping to secure packaging for e-commerce and technology components. We take pride in supplying a product that matches the demanding, real-world needs of factories on every continent—never losing sight of the importance of day-to-day reliability, total transparency, and a practical approach to quality improvement. As applications grow more sophisticated and standards climb, we remain committed to being not just a source of resin, but a partner in your production success.