| HS Code | 277936 |
| Density | 0.905 g/cm³ |
| Meltflowrate | 12 g/10 min |
| Tensilestressatyield | 23 MPa |
| Tensileelongationatyield | 10% |
| Flexuralmodulus | 1100 MPa |
| Izodimpactnotched23c | 6.5 kJ/m² |
| Izodimpactnotchedminus20c | 3.0 kJ/m² |
| Rockwellhardness | R70 |
| Heatdeflectiontemperatureat0 45mpa | 80 °C |
| Vicatsofteningpoint | 150 °C |
As an accredited Moplen EP548T PP Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Moplen EP548T PP Copolymer is packaged as free-flowing pellets in 25 kg multi-layer paper bags, palletized and stretch-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: Moplen EP548T PP Copolymer packed in 25kg bags on pallets, shrink-wrapped, securely loaded and containerized for safe transport. |
| Shipping | Moplen EP548T PP Copolymer ships as free-flowing virgin pellets in 25 kg bags or 1,000 kg jumbo bags, containerized with liners. Protect from moisture, direct sunlight, and high heat. Non-hazardous under transport regulations; handle carefully to avoid bag damage and product contamination. |
| Storage | Store Moplen EP548T PP Copolymer in a dry, clean, well-ventilated area, preferably indoors. Keep original containers sealed to prevent moisture pickup and contamination. Avoid direct sunlight, heat, and ignition sources. Maintain moderate temperatures; no special hazardous storage is required, but keep away from strong oxidizing agents and follow standard industrial hygiene practices. |
| Shelf Life | Shelf life is typically indefinite when stored in a cool, dry place away from UV light and contamination. |
Moplen EP548T is processed in thin-wall dairy and food container molding where the heterophasic copolymer must balance low-temperature drop impact with cycle times below 10 s. The material is injected on all-electric machines with clamp forces from 1,800 kN to 4,500 kN, using valve-gated hot runners and polished cooling channels. Melt temperature is maintained between 230 °C and 250 °C; mold temperature is set from 10 °C to 30 °C to accelerate solidification. For wall thicknesses between 0.45 mm and 0.80 mm, injection velocities above 150 mm/s prevent premature freeze-off when flow length/wall thickness ratios exceed 150:1. Holding pressure in the 35–55 MPa range is used to pack sidewall ribs without overpacking at gate regions. Typical formulation adjustments include 2–3 wt% white masterbatch, 0.08–0.15 wt% slip/antiblock masterbatch, and 0.10–0.20 wt% antistatic concentrate. Post-industrial regrind is incorporated at up to 20 wt% when impact specifications allow. Clarity improvement is obtained by adding a phosphate ester nucleator at 0.05–0.20 wt% when clarified tub grades are demanded. Food contact compliance is assessed under FDA 21 CFR 177.1520 and EU 10/2011, with overall migration limited to 10 mg/dm² in the appropriate food simulant. Finished containers are tested for drop impact at 4 °C according to ASTM D5276-19 and for top-load resistance via ASTM D2659-16. End products include 500–1000 mL dairy tubs, rectangular delicatessen containers, and shallow ice cream cartons with integrated snap lids.
Door panel lower trim and map pocket substrates are produced from EP548T-based compounds rather than neat resin. The heterophasic copolymer is blended with 10–20 wt% talc and 5–15 wt% ethylene-propylene rubber or ethylene-octene copolymer to meet scratch resistance and low-temperature impact requirements. Compounding is carried out on a co-rotating twin-screw extruder with L/D 40:1 to 44:1, using barrel temperatures from 180 °C to 220 °C, screw speeds of 300–600 rpm, and side feeding of talc after the primary melting section. Injection molding is performed with melt temperature 230–250 °C, mold temperature 20–40 °C, and injection speed 60–120 mm/s to reproduce grain textures on textured cavity surfaces. Packing pressure is set between 40 MPa and 70 MPa; bosses and ribs are placed at least 2.5 mm from part edges to avoid sink marks. Production-scale failure modes observed on door trim tools include short shots at rib intersections when melt temperature drops below 230 °C, gloss variation across the part caused by uneven mold surface temperature, and sink marks at bosses when packing pressure decays before gate freeze. Thermal-oxidative stability is maintained with a hindered phenolic/phosphite antioxidant package at 0.2–0.5 wt%, while malodorous volatiles are reduced by selecting low-VOC talc and using vacuum degassing in compounding. Emission limits for automotive interiors are defined by VDA 278 for VOC and fogging and VDA 270 for odor; horizontal burn rate is controlled under ISO 3795 or FMVSS 302. Scratch resistance is evaluated by PV 3952 or an OEM-specific five-finger test. End-use parts include door lower trim panels, map pockets, pillar lower covers, and seat side shields. Published data for this specific configuration is limited when proprietary low-emission additive packages are involved.
For exterior bumper side brackets and lower grille frames, EP548T is compounded with EPDM and talc to function as the polypropylene continuous phase in a thermoplastic olefin. A formulation with 55–70 wt% EP548T, 20–30 wt% EPDM with Mooney viscosity ML 1+4 at 125 °C between 40 MU and 80 MU, and 10–20 wt% talc is typical. The co-rotating twin-screw compounder uses L/D 40:1, barrel temperatures from 180 °C to 220 °C, and screw speed 300–600 rpm; EPDM is fed into the molten EP548T phase through a side feeder to limit phase inversion and uncontrolled viscosity rise. Injection molding of the resulting TPO is carried out at melt temperatures of 210–240 °C, mold temperatures of 20–50 °C, and injection pressures of 70–110 MPa. The compound must pass ISO 180:2019 notched Izod impact at −30 °C, ISO 527-2:2012 tensile testing, and ISO 178:2019 flexural modulus. Weatherability of unpainted exterior parts is verified by xenon arc exposure under SAE J2527 at 1,500 kJ/m² with color shift ΔE below 3.0. End products include bumper side brackets, lower grille frames, and underbody close-out panels.
Outer tub base plates in vertical-axis washing machines are injection molded with EP548T compounded with filler and impact modifier to support the drive shaft bearing housing and resist cracking under unbalanced load. A typical formulation uses 15–25 wt% talc or calcium carbonate, 5–10 wt% ethylene-octene copolymer, and 0.2–0.5 wt% heat stabilizer. Molding is performed on large hydraulic machines with clamp force from 8,000 kN to 18,000 kN and shot weights above 2 kg. Melt temperature is controlled at 220–250 °C; mold temperature is kept at 15–35 °C; holding pressure is applied at 60–80 MPa for 12–20 s to pack thick bearing bosses. Molded-in stress concentrations are reduced by maintaining a minimum radius of 1.5 mm at rib intersections. Post-mold shrinkage is measured according to ISO 294-4:2018 after 48 h at 23 °C; the talc-filled compound typically shows shrinkage of 0.5–0.8% in the flow direction and 0.8–1.2% across flow. Warpage at the bearing mount face is held below 0.3 mm over a 120 mm span to prevent seal misalignment. Flammability is classified under UL 94 HB; electrical safety is considered under IEC 60335-1. Flexural modulus is verified by ISO 178:2019. End products include outer tub bodies, base frames, and counterweight covers.
Because living-hinge durability in EP548T-based closures depends on molecular orientation through the hinge, tooling and processing are configured to maximize flow-induced orientation. Hinge thickness is maintained at 0.25–0.45 mm, and the gate is placed perpendicular to the hinge line. Melt temperature is set at 230–250 °C, mold temperature at 8–12 °C, and injection speed at 80–150 mm/s. Immediately after ejection, the hinge is flexed once or twice at 45–90° to orient polymer chains and increase fatigue resistance. Hinge endurance is validated by repeated open/close cycling to 10,000–20,000 cycles without crack initiation. Slip and opening torque are adjusted with 0.05–0.10 wt% erucamide; spherulite size and hinge clarity are refined with a sodium benzoate nucleator at 0.05–0.15 wt%. Pigment loading is held below 1.5 wt% to avoid embrittlement of the hinge zone. Food contact closures are controlled under FDA 21 CFR 177.1520 and EU 10/2011; pharmaceutical or personal care closures may additionally require organoleptic evaluation per USP <661.1> or Ph. Eur. 3.1.3. End products include flip-top caps for shampoo bottles, detergent closures, and caps for wipe canisters.
Returnable dairy and beverage crates molded from EP548T compounds are governed by stacking strength, hygiene, and outdoor storage. Wall sections range from 2.5 mm to 6.0 mm; melt temperature is 210–240 °C; mold temperature is 10–20 °C; hold pressure is 50–80 MPa. Tooling compensation uses post-mold shrinkage values of 1.0–1.5% measured under ISO 294-4:2018. Stacking load is tested at 23 °C and 40 °C with 250 kg compressive force for 24 h. UV stabilization uses 0.3–0.5 wt% HALS and 0.1–0.2 wt% phenolic antioxidant masterbatch. Compliance is evaluated under EC 1935/2004 for repeated food contact and DIN 4102-1 B2 or UL 94 HB for flammability. End products include ventilated dairy crates, bread trays, bottle crates, and automotive parts bins.
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Moplen EP548T is a heterophasic polypropylene impact copolymer supplied in pellet form for high-speed injection molding. The grade is positioned as a high-flow material; published technical data sheets report a melt flow rate of 60 g/10 min determined under ISO 1133-1:2022 at 230 °C and 2.16 kg. Representative mechanical values include a density of 0.905 g/cm³ under ISO 1183-1:2019, a tensile stress at yield near 26 MPa under ISO 527-2:2012, and a flexural modulus near 1,100 MPa under ISO 178:2019. The ethylene-propylene rubber phase in the impact copolymer increases notched impact energy compared with polypropylene homopolymer, while the high melt flow rate shortens fill time and permits reduced wall thickness. Typical end uses include thin-wall food packaging, housewares, caps and closures, pails, and appliance housings. Finished-part performance depends on mold design, thermal history, additive package, and pigment loading; lot-to-lot variation should be verified against the supplier certificate of analysis.
The melt-temperature set point for Moplen EP548T is generally specified between 200 °C and 250 °C, with an optimum from 220 °C to 240 °C in hot-runner tools. Below 200 °C, the apparent melt viscosity rises rapidly and the injection pressure required to fill a 0.8 mm wall section can exceed the capability of smaller molding machines; above 250 °C, prolonged residence beyond 8–10 minutes can reduce low-temperature impact through thermo-oxidative degradation of the rubber phase. Production-scale observations on accumulator-assisted machines with 40:1 L/D barrier screws indicate that the practical melt-temperature window is approximately ±10 °C around the optimum when regrind content exceeds 20 wt%. Hot-runner manifold temperatures should be kept within 10 °C of the nozzle temperature to avoid localized overheating in valve-gate drops. Mold temperature is applied from 20 °C to 60 °C; higher mold temperature improves knit-line strength but extends cycle time and can increase post-mold shrinkage variation.
Injection speed, hold pressure, and back pressure are more influential than screw speed for this high-MFR grade. A low back pressure of 0.5–1.0 MPa is recommended to limit shear heating. The melt cushion should be controlled below 3 mm, and the use of a positive shut-off nozzle is preferred to prevent drool from the high-flow melt. When pre-drying is necessary after open storage at relative humidity above 60%, pellets should be dried at 80 °C for 2 hours using a desiccant dryer with a dew point below -30 °C.
Shrinkage in a production mold is typically recorded in the range of 1.3% to 1.5% along flow and 1.2% to 1.4% transverse to flow, depending on packing pressure, hold time, and part thickness. Gate freeze-off occurs rapidly in the high-MFR melt, so the hold-pressure profile should be maintained until gate seal. Thick sections may require post-mold cooling fixtures to control bow and sink depth below 0.05 mm on visible surfaces. Tooling should provide vent depths of 0.02 mm to 0.03 mm for polypropylene, but the high flow front of this grade may increase gas entrapment if venting is insufficient.
Under ISO 527-2:2012, the tensile stress at yield for Moplen EP548T is generally reported between 25 MPa and 27 MPa, with tensile strain at yield near 6% to 7%. Flexural modulus under ISO 178:2019 is commonly specified at approximately 1,100 MPa. Charpy notched impact strength under ISO 179-1:2010 is typically 4–6 kJ/m² at 23 °C and 2–3 kJ/m² at -20 °C. Heat deflection temperature by ISO 75-2:2019 method B at 0.45 MPa is typically 78–85 °C, and Vicat softening point by ISO 306:2022 method A50 is near 152 °C.
These values place the grade below homopolymer polypropylene in stiffness and heat resistance but above general-purpose random copolymers in sub-ambient ductility. The transition from ductile to brittle behavior occurs between 0 °C and -20 °C depending on specimen geometry and processing history. Weld-line strength in impact copolymers is lower than that of the bulk material because the rubber particles can orient away from the knit line; for this reason, mold filling should be designed to place knit lines away from high-stress corners or seal edges. Published data for this specific configuration regarding fatigue and environmental stress cracking is limited; those properties must be generated for the intended part and loading condition.
| Property | Test method | Moplen EP548T | Homopolymer PP reference | Random copolymer PP reference |
|---|---|---|---|---|
| Melt flow rate at 230 °C/2.16 kg | ISO 1133-1:2022 | 60 g/10 min | 25–50 g/10 min | 25–50 g/10 min |
| Density | ISO 1183-1:2019 | 0.905 g/cm³ | 0.900–0.910 g/cm³ | 0.895–0.910 g/cm³ |
| Tensile stress at yield | ISO 527-2:2012 | 25–27 MPa | 30–35 MPa | 24–29 MPa |
| Flexural modulus | ISO 178:2019 | 1,100 MPa | 1,400–1,700 MPa | 800–1,000 MPa |
| Charpy notched impact at 23 °C | ISO 179-1:2010 | 4–6 kJ/m² | 1.5–3.0 kJ/m² | 3.5–5.5 kJ/m² |
| Charpy notched impact at -20 °C | ISO 179-1:2010 | 2–3 kJ/m² | 1.0–2.0 kJ/m² | 1.5–2.5 kJ/m² |
| Heat deflection temperature at 0.45 MPa | ISO 75-2:2019 method B | 78–85 °C | 90–110 °C | 65–85 °C |
Coloring and additive masterbatches can modify melt flow and impact response. Pigment or nucleating masterbatch additions above 3 wt% can shift the MFR by ±10% and may require melt-temperature compensation. Pre-compounded color is preferred over dry blending for thin-wall parts because dispersion defects become visible at wall thickness below 0.5 mm. If an antistatic, slip, or acid scavenger masterbatch is used, the converter should verify that the final article remains within the relevant migration limits for the intended food-contact application.
Replacement of a polypropylene homopolymer with Moplen EP548T typically lowers flexural modulus by 200–400 MPa and reduces heat deflection temperature by 5–15 °C, while increasing Charpy notched impact at 23 °C from roughly 2 kJ/m² to 4–6 kJ/m². The change may permit a reduction in wall thickness without short shots because the higher melt flow rate lowers filling pressure. Conversely, parts requiring high rigidity or tight dimensional stability at temperatures above 80 °C are better served by homopolymer grades. Replacing a random copolymer of similar melt flow rate with EP548T improves freezer-temperature toughness but reduces transparency; haze values for opaque impact copolymers are typically above 90%, whereas random copolymers can achieve haze below 10% in thin sections. Optical-grade applications should not use Moplen EP548T unless opacity is acceptable.
Compared with lower-MFR impact copolymers in the 10–30 g/10 min range, EP548T permits longer flow length at equal wall thickness and lower injection pressure, which may allow downsizing of molding clamp force. However, the higher melt flow is associated with a lower average molecular weight; tensile yield and Charpy impact may be slightly reduced relative to medium-flow grades of the same rubber content. Direct published comparative data between EP548T and other named impact copolymer grades is limited; the property differences above are derived from representative datasheet ranges and should not replace a mold-filling simulation or controlled production trial.
The base polyolefin may be evaluated for food-contact use under FDA 21 CFR 177.1520 for polypropylene copolymers and under Commission Regulation (EU) No 10/2011 and its amendments. The overall migration limit for plastic food-contact materials under EU 10/2011 is 10 mg/dm² of food contact surface for general materials, with higher values permitted only under specified reduction factors. For fatty food simulants, migration testing should be conducted under the intended time–temperature conditions; the test conditions and simulant selection follow EU 10/2011 Annex III and Annex V. The final article, including color concentrates and processing aids, must be subjected to migration testing because the resin certificate alone does not establish food-contact compliance of the converted part.
Heavy-metal restrictions for packaging fall under EU Directive 94/62/EC and its national implementing measures; Moplen EP548T is a polyolefin grade expected to be free of intentionally added lead, cadmium, mercury, and hexavalent chromium, but a certificate of compliance should be retained for each lot. REACH registration obligations apply to the supplier and importer; downstream users should confirm that the grade is covered in the relevant registration dossier for the intended use. UL Yellow Card data may be available for flame-retardant or electrical variants, but the standard Moplen EP548T grade is not flame retardant and should not be used in applications requiring a UL 94 V-0 rating.
| Requirement | Standard or regulation | Typical assessment for Moplen EP548T | Boundary condition |
|---|---|---|---|
| US food-contact polyolefin | FDA 21 CFR 177.1520 | Applicable to base polymer | Finished article subject to end tests and extractables limitations |
| EU food-contact plastic | EU 10/2011 | Base polymer assessable under Union List | Overall migration limit 10 mg/dm²; specific migration must be tested |
| Packaging heavy metals | EU Directive 94/62/EC | Expected absence of lead, cadmium, mercury, chromium VI | Certificate of compliance required |
| Chemical registration | REACH | Subject to supplier registration obligations | Downstream use must be communicated |
Open storage of Moplen EP548T should avoid direct sunlight and excessive heat; although polypropylene is not hydrolytically sensitive, surface moisture can generate splay and void defects. The grade is incompatible with strong oxidizing acids and with prolonged immersion in aromatic or chlorinated solvents; such exposures cause swelling and loss of mechanical strength. Outdoor articles require an adequately stabilized formulation or a UV protective coating because the standard grade is not intended for long-term exterior exposure.
