| HS Code | 704820 |
| Material | Polypropylene Copolymer |
| Density | 0.905 g/cm³ |
| Melt Flow Rate | 20 g/10min (230°C/2.16kg) |
| Tensile Strength At Yield | 28 MPa |
| Elongation At Break | >50% |
| Flexural Modulus | 1200 MPa |
| Izod Impact Strength Notched 23 C | 5 kJ/m² |
| Heat Deflection Temperature | 100°C (0.45 MPa) |
| Vicat Softening Temperature | 150°C |
| Melting Point | 165°C |
| Mold Shrinkage | 1.0-1.5% |
| Rockwell Hardness | R80 |
As an accredited POLYfill PPC T20040 PP Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | POLYfill PPC T20040 PP Copolymer is supplied in 25 kg sealed multi-wall paper bags, palletized and stretch-wrapped for safe transport. |
| Container Loading (20′ FCL) | POLYfill PPC T20040 PP copolymer loaded in a 20′ FCL: palletized bags securely stowed, protected from moisture and damage for safe transport. |
| Shipping | POLYfill PPC T20040 PP Copolymer ships as non-hazardous polypropylene granules in sealed, moisture-resistant bags or bulk containers. Store away from heat, ignition sources, and strong oxidizers. Ensure dry conditions and proper labeling. Transport in clean, covered vehicles to prevent contamination and physical damage. |
| Storage | Store POLYfill PPC T20040 PP Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep original containers tightly sealed to prevent moisture absorption and contamination. Avoid extreme temperatures and humidity. Under proper storage conditions, shelf life is typically 12 months from date of manufacture. |
| Shelf Life | Shelf life is typically 1 year when stored in a cool, dry place, away from direct sunlight and moisture. |
In thin-wall automotive interior substrates produced from POLYfill PPC T20040 PP Copolymer, the reduction of wall stock below 1.2 mm shifts the processing boundary from melt-temperature-driven flow to hold-pressure-driven packing. On production-scale injection molding lines with clamp forces between 1,500 kN and 4,500 kN, sinks and warpage are observed when the switch-over from velocity to pressure control occurs after the flow front has passed the last rib root. For pillar trim and lower garnish parts, the copolymer is introduced at 70–100 wt% as the base phase, with a talc masterbatch let-down of 0–20 wt% and color masterbatch at 2–4 wt%; the base resin is reduced accordingly to keep the total compound at 100 wt%. Where low-temperature impact is specified at −30 °C, an ethylene-propylene modifier is added at 5–10 wt%, but only after a lot-specific melt flow rate shift is verified against ISO 1133-1:2022; published data for this specific grade’s response above 10 wt% modifier is limited. Rheology control is performed under ISO 11443:2021 at 230 °C and apparent shear rates from 100 s⁻¹ to 1,000 s⁻¹, because capillary data at gate-relevant shear rates predicts short-shot behavior more consistently than MFR alone. Production settings for a hot-runner tool with a valve-gated drop include melt temperature 210–240 °C, mould temperature 30–60 °C, injection speed 40–120 mm/s, holding pressure 30–55 MPa, back pressure 0.5–1.5 MPa, and cooling time 12–25 s. Screw recovery is set to maintain a melt cushion of 3–6 mm because thicker cushions are associated with inconsistent hold-pressure transfer in multicavity tools. Material compliance is evaluated under ISO 3795 for interior horizontal burn rate, with a maximum burn rate of 100 mm/min for vehicle interior use; VOC emission testing is conducted according to VDA 270 where an odor grade ≤ 3 is commonly required; heavy-metal compliance follows ELV 2000/53/EC and REACH SVHC screening. Mechanical acceptance is typically measured under ISO 179-1:2023 for Charpy notched impact strength and ISO 527-2:2012 for tensile yield stress. Test specimens should be prepared according to ISO 19069-2:2016, and values without lot-specific CoA data should not be used for tool design. Finished part types include A/B/C pillar trim covers, door lower garnish panels, scuff plate back surfaces, seat side shields, and cowl side trim substrates.
Twin-screw compounding of POLYfill PPC T20040 PP Copolymer with talc or calcium carbonate concentrates filler dispersion in the first mixing zones before the side feeder. In a corotating twin-screw extruder with L/D 40–48, barrel temperatures from 180 °C in zone 1 to 230 °C in zones 7–9, and screw speeds of 300–600 rpm, the base resin is fed in the main hopper at 50–80 wt% of compound while filler is introduced through a side feeder at 20–50 wt%; the combined base resin and filler are held below 98 wt% before the additive package is added. A maleic anhydride-grafted PP coupling agent is added at 0.2–1.0 wt% only when the filler surface is not pre-treated; primary and secondary antioxidants are added at 0.1–0.5 wt% combined. The process is operated with vacuum devolatilization at −0.06 MPa to −0.09 MPa and die pressure of 3–8 MPa. Strand pelletizing instability appears most often when filler loading exceeds 40 wt% for fine talc with top cut below 5 µm, because the melt strength at die exit becomes insufficient; this is a critical threshold where strand breaks and fines generation increase measurably. Specific energy input in such lines is commonly maintained between 0.15 kWh/kg and 0.25 kWh/kg; exceeding 0.30 kWh/kg usually indicates over-filling in the kneading blocks or excessive die restriction. Compliance for compound outputs is typically checked by ISO 3451-1 for ash content, ISO 1133-1:2022 for melt flow rate, and ISO 179-1:2023 for impact strength after specimen preparation under ISO 19069-2:2016. Downstream terminal materials include talc-filled automotive interior compounds, calcium carbonate-filled appliance structural compounds, and custom masterbatches where the PPC T20040 grade serves as the carrier at 30–70 wt% depending on pigment loading. The most frequent production bottleneck is not melt temperature but side-feeder bridging when filler bulk density falls below 0.35 g/cm³; in such cases feeder throat purge air must be set below 0.1 MPa to avoid fluidization.
Pails and closures molded from POLYfill PPC T20040 PP Copolymer are processed with formulations that keep the overall migration into food simulants below the 10 mg/dm² limit in EU No 10/2011. The resin phase is maintained at 90–100 wt%, with food-contact-approved calcium carbonate at 0–5 wt% for rigidity, nucleating agent at 0.1–0.3 wt% for cycle-time reduction, acid scavenger at 0.03–0.10 wt%, and food-contact color masterbatch at 0–3 wt%; when resin loading is below 100 wt%, the combined resin, filler, and additives are balanced to 100 wt%. Under FDA 21 CFR 177.1520(c), the olefin polymer base is accepted for food contact when low-temperature impact is not dependent on non-compliant additives; however, fatty-food use above 100 °C requires specific migration testing because global migration data published for this grade is limited. Closure molding typically uses a high-cavity hot-runner tool with melt temperature 200–235 °C, mould temperature 15–50 °C, holding pressure 25–45 MPa, injection time 0.4–1.2 s, and cooling time 8–20 s depending on wall thickness from 1.0 mm to 3.0 mm. Hot-runner manifold balance is qualified by measuring fill-to-fill cavity weight deviation across 24 or more cavities; a deviation greater than 0.5 % triggers gate temperature adjustments. Cold-runner sprue and runner regrind is limited to 20 wt% for food-contact runs unless a validated closed-loop recycling study is available. Pail bodies with wall thickness 2.0–4.5 mm require clamp tonnage sufficient to prevent flash at projected areas above 0.08 m². Dimensional stability is checked by ISO 294-1 specimen molding followed by ISO 291 conditioning. Terminal types include 5–25 L pails with tamper-evident lids, 1–5 L food containers, closure caps for beverage and detergent packaging, and returnable transport crates where dimensional consistency under stack load is required.
Electrical distribution enclosures and surface-mount boxes produced with POLYfill PPC T20040 PP Copolymer require flame-retardant let-downs that are processed below 220 °C because common intumescent phosphorus-nitrogen systems degrade and generate plate-out above that temperature. The formulation typically contains 70–90 wt% base resin, 10–30 wt% halogen-free flame retardant, 0.1–0.5 wt% antioxidant, and 0.2–1.0 wt% UV stabilizer when the enclosure is exposed to indirect sunlight; the base resin and FR package are adjusted so the total formulation reaches 100 wt% after additive addition. Melt temperature is held at 190–215 °C, mould temperature at 30–70 °C, and back pressure at 0.3–0.8 MPa to avoid exposing the melt to excessive shear residence time; a screw with L/D 20–24 and a compression ratio of 2.0:1–2.5:1 is preferred. Plate-out from the FR package is monitored by controlling melt residence time between 3 min and 6 min; longer residence at melt temperatures above 200 °C increases the frequency of screw cleaning intervals. Part acceptance is evaluated under IEC 60695-2-12 glow-wire testing at 750 °C or 850 °C depending on end-product current rating, UL 94 at the as-molded thickness, IEC 60670-1:2013 for boxes and enclosures, and RoHS 2011/65/EU annex II for restricted substances. Electrical insulating properties are measured under IEC 62631-3-1 or IEC 60243-1, but comparative tracking index values should be verified because FR additives reduce the base resin tracking resistance. Terminal products include flush-mounted junction boxes, surface-mount enclosures, cable duct access covers, and meter box internal frames. Published data for this specific grade’s CTI after FR modification is limited; therefore, end-product certification must be based on compounded compound testing rather than base resin datasheet values.
Monobloc chair production with POLYfill PPC T20040 PP Copolymer uses long flow paths and rib-to-wall transitions that make sink marks the dominant failure mode when gate seal is not reached. Molding is conducted with melt temperature 200–240 °C, mould temperature 15–50 °C, injection speed 60–150 mm/s, holding pressure 30–50 MPa, and hold time extended until the gate freezes, which in thick sections can exceed 20 s. Gas-assisted injection is used on seat shells with local wall thickness above 6 mm to reduce sink depth and clamp force demand. Formulation for indoor chairs starts at 95–100 wt% base resin, with color masterbatch at 0–5 wt%, antioxidant at 0.05–0.20 wt%, and external UV stabilizer at 0.1–0.5 wt% only for outdoor exposure; the base resin is adjusted to total 100 wt% after additives. Slip and antistatic additives are not introduced without first verifying tensile yield stress loss under ISO 527-2:2012. For toy-like storage boxes sold in the EU, EN 71-3:2019+A1:2021 migration limits for soluble elements apply; for general consumer goods, REACH SVHC screening and CPSC lead limits apply. Furniture load performance is evaluated by EN 1728:2012 for seating or EN 12521:2015 for tables when applicable, but not all furniture items are covered by one standard. Polypropylene copolymer materials are not subject to phthalate restrictions under Annex XVII because the base polymer is unplasticized; this is verified by the absence of diphenyl phthalate in the formulation. Terminal outputs include one-piece monobloc chairs, stackable storage totes, outdoor seat shells, garden furniture armrests, and thick-wall utility boxes. The main processing limitation is warpage on large flat surfaces, which is controlled by keeping mould temperature differentials below 10 °C across core and cavity; if the differential exceeds 15 °C, the part is prone to corner lift after demolding.
Sheet extrusion from POLYfill PPC T20040 PP Copolymer is organized around a single-screw extruder with L/D 28–33, screen pack 60/80/100 mesh, and a coat-hanger die with lip gap 0.5–1.5 mm. Barrel temperatures are set from 200 °C at feed throat to 245 °C at the adapter, with melt temperature measured at 220–250 °C before the die. Chill rolls are maintained at 15–40 °C, and the cast sheet is drawn to a thickness of 0.3–1.2 mm depending on final cup depth. The formulation uses 90–100 wt% base resin, clarifying agent at 0.2–0.4 wt% when contact clarity is specified, color masterbatch at 0–3 wt%, acid scavenger at 0.03–0.10 wt%, and antioxidant at 0.05–0.2 wt%; the base resin is adjusted to total 100 wt% after additives. Thermoforming follows with sheet temperatures of 160–190 °C and plug-assisted draw ratios up to 1.5:1 for round cups. Edge trim and skeletal scrap from thermoforming can be reintroduced at 10–30 wt% in sheet extrusion provided bulk density is controlled and food-contact migration is retested under EU No 10/2011 after regrind addition. Food-contact compliance is documented under EU No 10/2011 overall migration limit of 10 mg/dm² and FDA 21 CFR 177.1520(c). The finished thermoformed containers are tested under EN 1186-1:2002 for overall migration into food simulants. Printability and heat-seal performance are evaluated by ASTM F88/F88M-21 for seal strength where a lidding film is applied. The operating boundary is set by high melt temperatures above 250 °C, which cause sheet surface oxidation and gel formation; lower temperatures below 200 °C produce melt fracture at the die lip. Terminal outputs include dairy cups, deli containers, fruit punnets, lid stock, and clear drinking cups when the clarified formulation is used. Deep-draw cups require a sheet gauge tolerance of ±0.05 mm, maintained by closed-loop die bolt adjustment and air knife pinning.
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POLYfill PPC T20040 PP Copolymer is supplied as a pelletized heterophasic polypropylene impact copolymer in which an ethylene–propylene rubber phase is dispersed within a semicrystalline polypropylene matrix. The PPC prefix identifies copolymer chemistry; the T20040 suffix is a manufacturer-specific grade identifier, with the trailing 40 conventionally associated with a nominal melt flow rate of 40 g/10 min when conditioned at 230 °C under a 2.16 kg piston load according to ISO 1133-1. Density is reported at 0.90 g/cm³ under ISO 1183-1. The grade falls within the class of opaque impact copolymers intended for injection molding of thin-wall parts where ambient and low-temperature ductility must coexist with rapid mold filling. Published data for the exact ethylene–propylene rubber phase ratio, molecular weight distribution, and nucleating additive package is limited; processors should obtain lot-specific certificates of analysis before setting cavity-to-cavity fill imbalance corrections or downstream printing and adhesion treatments.
Primary application categories include small appliance housings, battery fixtures, interior automotive trim, caps and closures, and industrial crates. The material is not selected where contact clarity or low haze is required because the dispersed rubber phase generates opacity. When replacement of a glass-filled or talc-filled grade is under evaluation, the unfilled nature of POLYfill PPC T20040 PP Copolymer reduces abrasive wear on tool steel but also lowers flexural modulus; both effects must be addressed in tool design and part deflection testing.
Because melt viscosity at 230 °C is lower than that of 10–20 g/10 min impact copolymer grades, screw recovery time and injection pressure are reduced. A general-purpose polypropylene screw with an L/D ratio of 20:1–24:1 and compression ratio of 2.5:1–3.0:1 is suitable; a check-ring non-return valve with 0.5–1.0 mm clearance tolerance should be maintained to avoid shot-volume drift. Barrel temperatures should be profiled from 40 °C at the feed throat through 200–230 °C in the compression zone, 220–250 °C in the metering zone, and 220–240 °C at the nozzle. Mold wall temperature should be held between 20 °C and 60 °C; higher mold temperatures slow frozen-skin formation and improve knit-line strength, while the lower end of the range shortens cycle time.
Drying is not required when sealed packaging remains intact and lot moisture is below 0.05 %. If pellets are exposed to relative humidity above 60 % for more than 4 h, desiccant drying at 80 °C for 2–3 h with a dew point of −30 °C or lower is recommended before processing to avoid surface splay. Back pressure should be set between 0.5 MPa and 1.0 MPa for uniform color concentrate dispersion; sustained back pressure above 1.5 MPa increases melt temperature and can reduce oxidation induction time measured by ISO 11357-6. Injection velocity should be adjusted so that flow-front advance rate is between 200 mm/s and 400 mm/s in thin-wall sections below 2.5 mm. Hold pressure should be 60–80 % of peak cavity pressure for 3–8 s, with gate-seal verification by weighing parts across sequential shots.
Short-shot conditions in thin-wall sections are controlled by flow-front velocity rather than by pressure alone. At wall thickness below 1.0 mm, fill velocity may need to exceed 500 mm/s, but shear heating at the gate can exceed 20 °C and alter local crystallinity. On production-scale injection molding machines with clamp force between 800 kN and 4,000 kN, shot-weight repeatability is strongly influenced by non-return valve wear. An increase in check-ring clearance from 0.5 mm to 1.5 mm can increase shot-to-shot weight variation above 0.2 %, causing dimensional drift in parts with wall thickness 2.0 mm or less.
Mechanical property comparisons should be made on test specimens conditioned according to ISO 291 at 23 °C and 50 % relative humidity for 88 h. The values in the table below are representative published figures for a 40 g/10 min heterophasic PP impact copolymer; exact lot values for POLYfill PPC T20040 PP Copolymer must be taken from the supplier certificate of analysis because published data for this specific configuration is limited.
| Property | Representative value | Test designation |
|---|---|---|
| Melt mass-flow rate, 230 °C, 2.16 kg | 40 g/10 min | ISO 1133-1 |
| Density | 0.90 g/cm³ | ISO 1183-1 |
| Tensile stress at yield, 50 mm/min | 26 MPa | ISO 527-2 |
| Tensile strain at yield | 5 % | ISO 527-2 |
| Flexural modulus, 2 mm/min | 1,400 MPa | ISO 178 |
| Notched Izod impact at 23 °C, Type A | 8.0 kJ/m² | ISO 180/A |
| Notched Izod impact at −20 °C, Type A | 3.5 kJ/m² | ISO 180/A |
| Deflection temperature under load, 0.45 MPa | 95 °C | ISO 75-2/B |
| Vicat softening temperature, A/50 | 150 °C | ISO 306 |
The 8.0 kJ/m² notched Izod value at 23 °C is a single-point measurement, not a ductile-brittle transition guarantee. In parts containing weld lines, gate vestiges, or sharp internal radii, local flow orientation and frozen stress can reduce measured impact energy by 30–50 %. A notched Charpy value generated under ISO 179-1 may differ from notched Izod under ISO 180/A because the test geometries impose different notch tip stress triaxiality. Tensile stress at yield and flexural modulus are also test-speed dependent; increasing tensile test speed from 5 mm/min to 50 mm/min can raise yield stress by 5–10 %, while flexural modulus measured at 2 mm/min under ISO 178 is typically higher than tensile modulus because the flexural test combines compressive and tensile responses across the thickness.
Continuous-use temperature in air is not equivalent to the deflection temperature under load. The 0.45 MPa heat deflection temperature of 95 °C measured under ISO 75-2/B indicates short-term stiffness retention under low stress; sustained load above 80–90 °C may lead to creep and stress relaxation. Flexural modulus of 1,400 MPa under ISO 178 is not a design modulus for long-term loading; tensile creep modulus at 1,000 h under 10 MPa stress can drop to 40–60 % of short-term modulus depending on temperature. Creep rupture and creep modulus should be evaluated under ISO 899-1 or ASTM D2990 for load-bearing parts.
Polypropylene impact copolymer is incompatible with strong oxidizing acids such as concentrated nitric acid, and with chlorinated hydrocarbons such as carbon tetrachloride. Immersion testing under ISO 175 should cover each actual service fluid at the upper use temperature. Dilute acids, alkalis, aqueous salt solutions, and many polar organic solvents can be tolerated up to 60 °C, but stress cracking resistance depends on part stress state and molded-in orientation. Outdoor use without carbon black or hindered amine light stabilizer systems results in chalking, gloss loss, and embrittlement. Weathering resistance should be assessed by ISO 4892-2 or ASTM G155 with specified irradiance and cycle; published data for this specific grade under long-term outdoor exposure is limited.
Regulatory suitability depends on the specific additive and monomer package. Polypropylene homopolymers and copolymers intended for food contact are commonly evaluated under FDA 21 CFR 177.1520 for olefin polymers and under EU Regulation 10/2011 for plastic food contact materials. Compliant status for POLYfill PPC T20040 PP Copolymer must be documented per lot, because additive migration kinetics and residual monomer levels vary with comonomer ratio and catalyst system. For electrical and electronic housings, RoHS recast 2011/65/EU as amended by 2015/863 restricts lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE; a supplier declaration is required for each production batch.
Replacement of a random copolymer PP with POLYfill PPC T20040 PP Copolymer in an existing tool changes demolding and dimensional stability. Random copolymer PP typically has haze below 10 % on 2.0 mm plaques under ASTM D1003, whereas the impact copolymer is opaque. Substitution therefore eliminates any transparency requirement but increases notched Izod at −20 °C from values commonly below 2 kJ/m² to values near 3.5 kJ/m² under ISO 180/A. Mold shrinkage allowance changes from 0.8–1.2 % for random copolymer to 1.0–1.4 % for impact copolymer, measured under ISO 294-4.
Compared with homopolymer PP of the same melt flow rate, the impact copolymer sacrifices flexural modulus. Homopolymer values can exceed 1,600 MPa, while the impact copolymer remains near 1,400 MPa. Low-temperature impact represented by notched Izod at 0 °C improves from below 2 kJ/m² to above 3 kJ/m². Homopolymer PP also typically has higher heat deflection temperature but lower ductile failure resistance in notched sections. Compared with talc-filled PP copolymers, POLYfill PPC T20040 PP Copolymer is unfilled and has lower flexural modulus; talc-filled grades may exceed 2,500 MPa but often exhibit lower weld-line strength and reduced melt flow. The unfilled grade also has lower density and avoids abrasive wear of tool steel surfaces.
Hot runner systems with valve gates are preferred for multicavity thin-wall tools. Sequential valve gating can create internal weld lines; notched Izod values at the weld line under ISO 180/A may drop by 30–50 % relative to the bulk value. Small gate diameters below 0.8 mm can cause excessive shear heating in a 40 g/10 min melt, leading to gate blush or local resin degradation. A thin-wall container with nominal wall thickness 2.0 mm, projected area 1,200 cm², and cavity pressure 80 MPa imposes 960 kN clamp force; a 1,500 kN injection molding machine provides 36 % margin. With melt temperature 230 °C and mold temperature 30 °C, the 40 g/10 min melt can fill a flow length-to-thickness ratio of 150:1 at gate velocities below 0.5 m/s if the gate diameter is at least 1.0 mm. Gate-freeze verification by part-weight stability across 50 shots should remain within ±0.15 %.
