| HS Code | 215944 |
| Product | Moplen EP549T PP Copolymer |
| Property 1 | Density: 0.9 g/cm³ |
| Property 2 | Melt Flow Rate (230°C/2.16 kg): 55 g/10 min |
| Property 3 | Tensile Yield Strength: 24 MPa |
| Property 4 | Elongation at Yield: 8% |
| Property 5 | Flexural Modulus: 1200 MPa |
| Property 7 | Vicat Softening Temperature (A50): 150°C |
| Property 8 | Heat Deflection Temperature (0.45 MPa): 80°C |
| Property 9 | Melting Point: 165°C |
| Property 10 | Hardness (Rockwell R): 85 |
| Property 11 | Mold Shrinkage: 1.2% |
As an accredited Moplen EP549T PP Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Moplen EP549T PP Copolymer is supplied in 25 kg heat-sealed paper bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL loading of Moplen EP549T PP copolymer: packed in palletized bags, secured, dry, ventilated, protected from moisture and contamination. |
| Shipping | Moplen EP549T PP Copolymer is shipped as solid pellets in clean, dry hopper trucks, railcars, or lined bags. Protect from moisture and contamination. It is not classified as hazardous for transport under ADR/IMDG, but avoid dust accumulation and ignition sources. Handle with standard industrial hygiene practices. |
| Storage | Store Moplen EP549T PP Copolymer in a cool, dry, well-ventilated area away from direct sunlight, sparks, and heat sources. Keep containers tightly sealed to prevent moisture contamination and dust accumulation. Avoid contact with strong oxidizing agents. Properly stored in original packaging, the material remains stable under normal conditions. |
| Shelf Life | Moplen EP549T PP copolymer has an indefinite shelf life when stored in original packaging, away from heat, moisture, and UV light. |
Because heterophasic polypropylene copolymer such as Moplen EP549T exhibits a crystallization freeze range rather than a single solidification point, reusable logistics crate molding is run with a nozzle melt temperature of 220–240 °C and a mold wall temperature of 15–25 °C, both checked with contact pyrometry and logged against the batch number. The base formulation is set at 100 parts by weight of EP549T, 2–4 parts of a polypropylene-matrix color masterbatch, and 0.1–0.3 parts of a hindered phenolic/phosphite antioxidant masterbatch; post-industrial regrind is introduced at 15–25 parts only after the blended lot is verified to retain an MFR shift of no more than ±0.5 g/10 min under ISO 1133-1:2022 and a notched Charpy impact at -20 °C above the part-specific bound under ISO 179-1/1eA. Regrind beyond 25 parts by weight is not used for folding-crate hinge or drop-load geometries because the melt-flow path balance shifts and the hinge web can exhibit brittle fracture in cold-chain distribution at -10 °C. Mold filling for a 32 L ventilation crate with a projected area of 0.30–0.40 m² is carried out on hydraulic toggle presses of 1000–1600 t clamp force, using valve-gated hot-runner systems with 4–6 drops; the fill stage is completed in 1.5–2.5 s at a constant screw speed of 40–70 rpm, followed by a packing phase of 50–70 MPa held for 4–8 s at 60–80% of injection pressure. Back pressure is set at 0.5–1.5 MPa to avoid color-masterbatch agglomerates, and the screw is a general-purpose PP metering design with L/D ratio of 20:1–24:1 and compression ratio of 2.5:1–3.0:1. Compliance for color and additive packages follows REACH (EC) No 1907/2006 and RoHS 2011/65/EU; where crates are specified for repeated contact with unpackaged bakery products or fruit, resin compliance is confirmed with FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011, including overall migration testing under EN 1186-1. Drop impact performance is not treated as an intrinsic polymer value: loaded crates are conditioned for 48 h at 23 °C and -10 °C, then tested under ASTM D5276-17, with acceptance drop height derived from gross mass and handling environment in the packaging specification. Terminal product types include collapsible retail distribution crates, ventilated fruit and vegetable harvest crates, bread trays, dairy stack-nest boxes, and solid-wall industrial pallet boxes.
Automotive interior substrates made from EP549T are processed at 100 parts by weight with 0.3–0.6 parts of a hindered amine light stabilizer and 2–4 parts of color masterbatch whose carrier viscosity is matched to the base melt to prevent streaking on low-gloss grained surfaces. Where dimensional tolerance below ±0.5 mm is required on large panels, 0.05–0.2 parts of a beta-nucleating masterbatch may be introduced; after beta-nucleation, flexural modulus under ISO 178:2019 is re-verified because the crystalline architecture shifts. Shot masses of 800–2000 g are molded on 600–1200 t clamping presses with sequential valve-gated hot runners; valve sequencing is programmed to move the weld line out of visible A-surfaces and away from impact load paths. Melt temperature at the nozzle is kept at 230–250 °C, mold walls at 30–50 °C via water-circulation temperature control, and the fill speed is profiled from 80–120 mm/s during the first 70% of flow to 30–50 mm/s for the last 30% to suppress jetting and flow marks. Holding pressure is maintained at 40–70 MPa for 0.5–1.0 s per mm of nominal wall thickness; cooling time for 2.5 mm wall is 12–18 s, after which parts are ejected at a surface temperature below 60 °C to prevent post-ejection warpage.
Flammability is evaluated under ISO 3795 and FMVSS 302; for applications requiring a burn rate below 100 mm/min, wall thickness and colorant effects are checked on production plaques rather than assumed from unfilled natural resin. Fogging is measured by ISO 6452:2021, and OEM-specific odor/VOC protocols may use VDA 277 and VDA 270. Heavy-metal and SVHC restrictions fall under the ELV Directive 2000/53/EC Annex II and REACH (EC) No 1907/2006. Notched Charpy impact at -20 °C under ISO 179-1/1eA and multi-axial impact behavior are tracked per lot because weld-line retention in grained door panels is a function of both hot-runner sequencing and local cooling rate.
| Control parameter | Standard / method | Production check |
|---|---|---|
| Melt flow rate | ISO 1133-1:2022 | Lot MFR at 230 °C/2.16 kg recorded |
| Notched Charpy at -20 °C | ISO 179-1/1eA | Minimum lot value retained from COA |
| Flexural modulus | ISO 178:2019 | Check on 4 mm plaque |
| Flammability | ISO 3795 / FMVSS 302 | Burn rate ≤100 mm/min where required |
| Fogging | ISO 6452:2021 | Report condensate mass |
Terminal product types include lower door trim panels, seat back covers, glove box frames, center console brackets, HVAC heater case halves, and trunk side trims.
Washing machine outer tubs use EP549T at 100 parts by weight with 10–20 parts of a talc-filled polypropylene coupling masterbatch or, where higher density is needed for spin-cycle vibration control, 10–25 parts of barium sulfate masterbatch; filler additions are not extended beyond 25 parts because notched Charpy impact at 0 °C under ISO 179-1/1eA on the annular weld line falls below the bearing-load margin and the fracture mode changes from ductile to brittle. Outer tub shots of 3–6 kg are molded on hydraulic presses of 1800–3000 t clamp force; a central sprue or two-valve hot runner controls the weld line at the bearing hub and seal groove. Melt temperature at the nozzle is maintained at 230–250 °C, mold blocks at 35–50 °C with near-isothermal water circuits, and mold shrinkage on 60 mm square plaques after 24 h at 23 °C is measured in the range of 1.0–1.4% with the difference between flow and transverse shrinkage held below 0.2 percentage points. Packing pressure of 60–80 MPa is held for 1.0–1.5 s per mm at the bearing seat and stepped down in 20 MPa intervals to reduce sink marks at bosses and ribs. Electrical safety and mechanical endurance are evaluated under IEC 60335-2-7; sustained-load creep under unbalanced spin load is verified by ISO 899-2 flexural creep at 60 °C in an alkaline detergent solution, with the stress level and duration set from the OEM reliability specification, not assumed from short-term tensile data. Seal-groove stress-cracking is checked after thermal cycling from 20 °C to 90 °C in the presence of detergent foam; published data for this specific EP549T tub configuration are limited. Terminal product types include top-load washer outer tubs, front-load washer tubs, pedestal drawer frames, lint filter housings, and pump volute blanks.
Injection molded 20 L pails and battery case covers are formulated at 100 parts by weight EP549T with 0.2–0.4 parts of antioxidant stabilizer, 2–3 parts of UV stabilizer masterbatch for outdoor storage, and 2–4 parts of color masterbatch; regrind is limited to 10–15 parts by weight because ASTM D5276-17 drop-impact retention on side-gated pail walls is sensitive to melt integrity and heat history. Pails with 2.0–3.0 mm wall thickness are filled on 500–800 t hydraulic presses with melt temperature at 210–240 °C and mold temperature at 15–25 °C; a continuous melt front is maintained by a moderate-to-slow injection speed profile that prevents air traps at integrated handle bosses. Hold pressure of 40–60 MPa is applied for 1.0 s per mm before gate freeze, and post-mold dimensional checks are made after 24 h at 23 °C and 50% relative humidity according to ISO 291. For dangerous-goods packaging, the pail is certified under ADR/RID Chapter 6.1 as a UN-type package, and the polymer resin alone does not confer certification. Chemical compatibility for the EP549T matrix covers dilute acids, alkalis, and limited short-term contact with some detergent solutions; concentrated nitric acid, aromatic hydrocarbons, and strong oxidizing media are outside the operational boundary. Terminal product types include 10–25 L open-head pails, tamper-evident lid containers, lead-acid battery case covers, electroplating jig insulators, and waste-disposal containers.
When high-cavitation cap tooling is supplied with a medium-flow heterophasic copolymer, the melt-temperature window is raised to 235–255 °C at the nozzle because thin-wall fill through 0.8–1.2 mm gate diameters relies on shear heating to reduce viscosity. The formulation consists of 100 parts by weight EP549T, 1–2 parts of erucamide-based slip masterbatch to control removal torque, and 0.5–1.0 parts of antistatic masterbatch for dry-material handling; regrind is held at or below 10 parts because multiple heat histories in 48–96 cavity hot-runner tools increase the short-shot rate. High-speed injection molding is run with injection pressures of 100–150 MPa, fill times of 0.2–0.5 s, and holding pressure of 30–50 MPa for 0.2–0.5 s; chilled mold water at 8–15 °C extracts heat fast enough to prevent gate-zone warpage in tamper-evident band designs. Food-contact closures are required to comply with FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011; overall migration is verified under EN 1186-1 using fatty-food simulants after 10 days at 40 °C, and conversion-line cleaning procedures must be validated to avoid cross-contamination. Environmental stress-cracking resistance of the stressed hinge region in aggressive household chemical closures is evaluated with ISO 22088-3 bent-strip method; published thin-wall stress-cracking data for EP549T in this specific closure configuration are limited. Terminal product types include tamper-evident beverage closures, edible oil bottle caps, detergent spout caps, and cosmetic flip-top caps.
| Wall thickness | Nozzle melt temperature | Fill time | Holding pressure | Cooling time |
|---|---|---|---|---|
| 1.0 mm | 240–255 °C | 0.15–0.35 s | 30–50 MPa | 4–8 s |
| 1.5 mm | 235–250 °C | 0.30–0.50 s | 40–60 MPa | 8–12 s |
| 2.0 mm | 220–240 °C | 0.50–0.80 s | 50–70 MPa | 12–16 s |
Small kitchen appliance lower housings use EP549T at 100 parts by weight with 3–5 parts of a mineral-filled masterbatch to reduce post-molding warpage in flat bottom decks; talc or calcium carbonate loading is not extended beyond 15 parts in snap-fit or screw-boss areas because tensile elongation at break under ISO 527-2/1A falls and the material loses ductility during assembly. Melt temperature is set at 220–250 °C and mold temperature at 25–40 °C on 200–500 t presses; textured cavity surfaces are used to conceal sink marks at reinforcing ribs, and injection speed is profiled to avoid gas entrapment at the hot-plate weld flange. Hot-plate welding of upper and lower shells is performed with plate temperatures of 240–260 °C, weld time of 8–15 s, and joint pressure of 0.1–0.3 MPa; weld strength is compared to the base material tensile yield stress under ISO 527-2/1A and must meet the OEM assembly specification for pressure-tight enclosures. Electrical safety, resistance to heat and fire, and mechanical hazard protection are evaluated under IEC 60335-1 and the applicable subpart for the appliance family; flammability rating is verified under UL 94 HB at the minimum wall thickness. Terminal product types include electric kettle lower housings, rice cooker outer shells, steam iron water tanks, vacuum cleaner bag housings, and small appliance service covers.
Competitive Moplen EP549T PP Copolymer prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Moplen EP549T is a heterophasic polypropylene impact copolymer produced by LyondellBasell. The polymer comprises an isotactic polypropylene homopolymer matrix and a dispersed ethylene-propylene copolymer phase. The grade is specified for injection moulding of technical components in which low-temperature impact resistance is required without the density increase of mineral or glass-fibre reinforcement. Supplier-published core properties include a melt mass-flow rate of 12 g/10 min under ISO 1133-1:2022 at 230 °C and 2.16 kg, a density of 0.900 g/cm³ under ISO 1183-1:2019, a tensile modulus of approximately 1200 MPa under ISO 527-2:2012, and a notched Charpy impact strength at 23 °C between 10 kJ/m² and 20 kJ/m² under ISO 179-1/1eA. Lot-specific values remain governed by the certificate of analysis, and single-point database values should not replace measured data for structural finite-element simulation.
Random copolymers place ethylene directly in the polypropylene chain, reducing crystallinity and modulus while increasing optical clarity. Moplen EP549T instead concentrates ethylene in a dispersed elastomer phase. This morphological arrangement produces two glass transition events: the polypropylene matrix transitions near 0 °C to 10 °C, and the ethylene-propylene phase transitions below −40 °C. The retained matrix crystallinity yields a higher tensile modulus than a random copolymer of equivalent melt flow, while the low-temperature elastomer phase allows ductile yielding under notch impact rather than brittle crack propagation. The resulting optical penalty is significant: unpigmented impact copolymers can exceed 60 % haze at 2 mm thickness, whereas random copolymers can reach below 20 %. For transparent packaging or thin-wall optical parts, Moplen EP549T is unsuitable; for pigmented interior and structural parts the impact advantage is the controlling factor.
| Property | Test method | PP homopolymer | PP random copolymer | PP impact copolymer |
|---|---|---|---|---|
| Melt mass-flow rate range | ISO 1133-1 | 2–40 g/10 min | 2–40 g/10 min | 5–50 g/10 min |
| Tensile modulus | ISO 527-2 | 1300–1700 MPa | 800–1100 MPa | 1000–1400 MPa |
| Notched Charpy impact at 23 °C | ISO 179-1/1eA | 3–6 kJ/m² | 6–15 kJ/m² | 10–30 kJ/m² |
| Notched Charpy impact at −20 °C | ISO 179-1/1eA | 1–2 kJ/m² | 2–4 kJ/m² | 4–8 kJ/m² |
| Heat deflection temperature, B load | ISO 75-2/B | 85–105 °C | 75–90 °C | 80–100 °C |
The dispersed rubber phase in heterophasic copolymers is not monodisperse. Electron microscopy of comparable grades shows ethylene-propylene domain diameters from 0.5 µm to 2.0 µm. Larger domains promote cavitation and energy absorption, but reduce tensile stiffness. Moplen EP549T is balanced by controlled vis-breaking to produce a medium-flow product with a reasonably controlled molecular weight distribution. However, its melt strength is not suitable for blow moulding or profile extrusion; parison sag and draw-down instability may occur. This restrictive process boundary means the grade should be used only in injection moulding unless validated by pilot-scale extrusion trials.
On a production-scale injection moulding line equipped with a 25 mm to 35 mm general-purpose screw and non-return valve, melt temperatures are normally set from 210 °C to 240 °C. Mould temperatures between 30 °C and 50 °C are typical; increasing the mould surface to 60 °C improves weld-line toughness but increases cooling time. The two-phase structure makes first-stage to second-stage transfer pressure critical. Premature switchover causes sink marks because the elastomer phase does not densify like the homopolymer matrix. On a 120 t clamp unit running a flat panel with 2 mm wall thickness, gate-seal hold time is commonly 4 s to 6 s. Longer hold after gate freeze does not reduce post-demoulding shrinkage. Mould shrinkage is anisotropic, typically 1.0 % to 1.6 % in the flow direction and 0.8 % to 1.2 % transverse to flow. The material does not require hydrolytic pre-drying under normal indoor storage. However, regrind above 20 % or storage above 50 % relative humidity can cause surface splay; such lots are typically dried at 80 °C for 2 h in a desiccant dryer.
Flow-induced orientation in the skin layer of an EP549T moulding creates modulus anisotropy. Along-flow tensile modulus can exceed transverse modulus by 10 % to 20 % in sections below 2 mm. Mechanical test specimens should therefore be cut parallel and transverse to flow and tested under ISO 527-2. In instrumented puncture tests under ISO 6603-2, peak force depends on distance from the gate because the skin-core thickness ratio changes with local cooling rate. Incoming quality control protocols should use a fixed specimen edge distance of 25 mm from the gate and record mould temperature at the time of testing. This practice reduces false lot-to-lot variation caused by sampling location rather than polymer quality.
The medium-flow character of Moplen EP549T offers a compromise between thin-wall filling and impact retention. Capillary rheometry under ISO 11443:2021 shows shear-thinning behaviour with a power-law index below 0.4 at shear rates above 100 s⁻¹. A general-purpose screw with a compression ratio of 2.0:1 to 2.5:1 and barrel residence time below 5 min is appropriate. Hot-runner tips below 1.5 mm diameter can generate melt temperatures above 250 °C at high injection velocity. Thermal degradation of the elastomer phase then occurs by polypropylene chain scission and ethylene-propylene domain coalescence, reducing notched Charpy impact at −20 °C. Hydraulic back pressure is normally maintained between 5 bar and 10 bar; pressures above 15 bar increase screw recovery time without improving dispersion.
Regrind from sprues and runners can be incorporated at levels up to 20 % with minimal effect on impact if the regrind is free of dust and colourant contamination. Above 30 %, repeated thermal history can shift the melt flow rate by 2 g/10 min to 4 g/10 min per pass and reduce the high-molecular-weight tail that supports notched impact. For thin-wall parts, melt flow ratio should be monitored at two loads under ISO 1133-1 to detect molecular degradation before Charpy specimens are moulded. If the two-load ratio changes by more than 0.2 relative to virgin material, regrind content should be reduced or stabiliser levels reviewed.
Representative applications include automotive interior door trim, instrument panel retainers, battery boxes, crates, pails, appliance housings, and outdoor furniture components. In a battery box measuring 400 mm × 300 mm × 120 mm with 3 mm wall thickness, the grade allows demoulding at 50 °C without plate-out and prevents the cold-temperature brittleness seen in homopolymer PP when ambient temperature falls below 0 °C. For Class A visible surfaces, hot-runner valve gates are preferred because long cold-runner sprue marks produce flow lines in heterophasic material. In crates and pails, the impact-copolymer morphology reduces cracking in drop tests at −20 °C, a condition where homopolymer PP often fails by brittle impact. Snap-fit closures that must survive repeated cold assembly also use this grade, provided the flexural modulus requirement remains below approximately 1300 MPa.
Substituting Moplen EP549T for a homopolymer PP of similar melt flow shifts the dominant failure mode from brittle fracture to ductile yielding. A homopolymer of equivalent melt flow routinely exhibits notched Charpy impact at 23 °C below 5 kJ/m² under ISO 179-1/1eA, whereas the impact copolymer is typically above 10 kJ/m². The penalty is stiffness: tensile modulus falls from a homopolymer range of 1400 MPa to 1600 MPa to approximately 1200 MPa for EP549T. In a flat panel loaded in compression, critical buckling load scales with the square root of modulus; a 15 % modulus reduction lowers buckling resistance by approximately 7 %. Rib depth must therefore be increased or rib spacing reduced unless the existing part is already impact-limited rather than stiffness-limited. The material also shows higher weld-line sensitivity than homopolymer PP because the two-phase structure prevents complete entanglement across the melt interface. In finite-element simulation, weld-line strength should be derated by 30 % to 50 % of bulk tensile yield unless welded-specimen data are generated under the actual process.
Impact failure in Moplen EP549T occurs by cavitation and shear yield. Under Charpy or falling-dart loading, the dispersed ethylene-propylene phase cavitates first, releasing triaxial tensile stress at the notched tip; the surrounding polypropylene matrix then yields and absorbs energy. At −20 °C, the rubber phase remains above its glass transition, so the ductile mechanism persists. Sharp internal corners below 0.5 mm radius or knit lines can overwhelm this mechanism and produce crack initiation at the flow-front interface. Mould design should use radii above 1 mm at rib roots and avoid direct gating into weld lines. Delamination can occur if the rubber phase is over-sheared or if an incompatible colour concentrate causes phase separation. Production controls should keep melt temperature below 240 °C and use a colour carrier with a melt flow rate within 10 g/10 min of the base polymer.
Long-term heat ageing at 120 °C can produce surface crack formation before bulk embrittlement because the matrix undergoes post-crystallisation and oxidative chain scission at the skin. Automotive interior parts with local temperatures above 110 °C require additional thermal stabilisation; the standard injection-moulding grade is not specified for underhood use. Oven ageing at 150 °C for 300 h is a common accelerated practice, but published data for this specific grade are limited and should be generated with finished part geometry. The material resists aqueous acids and alkalis at ambient temperature, but aromatic and chlorinated solvents swell the rubber phase and reduce modulus. Environmental stress cracking can occur in contact with ester-based lubricants; for industrial closures involving synthetic lubricants, validation under ASTM D1693 with the actual fluid is required.
For food-contact parts, Moplen EP549T requires evaluation under EU 10/2011 and FDA 21 CFR 177.1520 for olefin polymers. The base polymer is typically covered by supplier regulatory statements, but finished parts must be revalidated because pigments, processing aids, and regrind can alter overall migration. Heavy metal restrictions under RoHS 2011/65/EU and REACH candidate list compliance for SVHC are generally addressed by the base polymer; colour concentrates and masterbatches are outside the base-grade statement. The grade is not suited for prolonged hot-fill above 90 °C because heat deflection under load lowers dimensional stability. Published data for long-term UV weathering of unpigmented EP549T are limited; outdoor parts should use proven UV stabilisation packages and accelerated validation under ISO 4892-2.
