| HS Code | 114584 |
| Density | 0.905 g/cm³ |
| Melt Flow Rate | 9 g/10 min (230°C/2.16kg) |
| Tensile Yield Strength | 28 MPa |
| Elongation At Break | 50% |
| Flexural Modulus | 1200 MPa |
| Izod Impact Strength | 5 kJ/m² |
| Heat Deflection Temperature | 100°C |
| Vicat Softening Temperature | 155°C |
| Shore D Hardness | 65 |
| Melting Temperature | 165°C |
As an accredited Scolefin 45 B 20-9 PP Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Scolefin 45 B 20-9 polypropylene copolymer is supplied in 25 kg multilayer paper bags, palletized and wrapped for safe transport. |
| Container Loading (20′ FCL) | Scolefin 45 B 20-9 PP Copolymer is packed in bags, loaded securely in a 20′ FCL container for safe transport. |
| Shipping | Scolefin 45 B 20-9 PP Copolymer ships as a non-hazardous plastic resin in sealed bags or bulk containers. Store away from moisture, heat, and direct sunlight. Use covered, dry transport with adequate ventilation to prevent condensation. Avoid dust accumulation and keep packaging intact during handling. |
| Storage | Store Scolefin 45 B 20-9 PP Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep packaging tightly sealed to prevent moisture uptake and contamination. Avoid prolonged exposure to temperatures above 40°C. Protect from mechanical damage. Use proper handling and storage practices to maintain material integrity. |
| Shelf Life | Shelf life is typically two years from manufacture when stored unopened, in original packaging, away from heat and moisture. |
For thin-wall dairy and prepared-food container conversion, Scolefin 45 B 20-9 PP Copolymer is typically processed at melt temperatures between 210 °C and 250 °C, with mould temperatures held between 15 °C and 35 °C to stabilise part geometry at wall thicknesses from 0.35 mm to 0.80 mm. In food-contact applications, the compound must satisfy EU Regulation No 10/2011 Annex II overall migration limits of 10 mg/dm² when tested under Annex III conditions using food simulant D2 for fatty media and 3% w/v acetic acid for aqueous acid media, as well as FDA 21 CFR 177.1520 paragraphs (c)(1) and (c)(2) for olefin polymers. A typical addition profile for high-speed moulding includes a PP-based colour masterbatch at 1.5 wt% to 3.0 wt%, a slip/antiblock masterbatch at 0.05 wt% to 0.15 wt%, and a nucleator masterbatch at 0.05 wt% to 0.10 wt% to reduce cycle time and improve top-load rigidity. On a high-speed injection line, the material is metered through a three-zone screw with L/D ratio between 18:1 and 22:1 and compression ratio from 2.0:1 to 2.5:1; valve-gated hot-runner systems are used to maintain gate vestige height below 0.10 mm for lid stacking. Production-scale observations show that injection velocities above 300 mm/s and cavity fill times from 0.35 s to 0.60 s reduce gate blush but increase the risk of jetting if the gate is not positioned at the container base centre. Hold pressure is maintained between 20 MPa and 40 MPa hydraulic pressure, with switch-over from velocity to pressure control occurring at 95% to 98% cavity volume. Published data for the specific Scolefin 45 B 20-9 designation is limited for fatty-food migration above 40 °C, so converters must verify lot-specific melt-flow rate and additive composition against the certificate of analysis before using the grade in microwave reheat containers. Downstream articles include margarine tubs, dairy cups, deli containers, portion packs, and overcap lids where the combination of flow length and wall uniformity dictates part weight variation below 0.5% on 48-cavity tooling.
Automotive interior programmes using Scolefin 45 B 20-9 PP Copolymer as the base resin require a balance between low-temperature impact, stiffness, and compliance with evaporative emission limits. The compound is prepared on a co-rotating twin-screw extruder with 40:1 L/D ratio and segmented screw elements designed for high-shear dispersion of talc and elastomer at barrel temperatures from 190 °C to 220 °C. Typical formulation ranges include talc at 15 wt% to 25 wt%, ethylene-octene copolymer at 5 wt% to 15 wt%, maleic anhydride-grafted PP at 1.0 wt% to 2.5 wt%, and a hindered phenol/phosphite antioxidant package at 0.2 wt% to 0.4 wt% combined with a HALS package at 0.2 wt% to 0.4 wt% for interior UV exposure. The compliance stack for instrument panel-adjacent parts typically includes VDA 277 VOC testing with a maximum of 100 µg C/g, VDA 270 odour sum score of no more than 3.0, ISO 3795 horizontal burn rate below 100 mm/min, and REACH annex XVII restrictions on specific phthalates and PAHs. Injection moulding is performed at melt temperatures of 220 °C to 230 °C, mould temperatures between 40 °C and 60 °C, and holding pressures calibrated to avoid sink marks around bosses with wall thickness transitions above 2.0 mm. The table below presents a laboratory compounding matrix used to evaluate talc and elastomer sensitivity for door panel lower substrates; the values are representative of publicly reported PP impact copolymer compound windows, and they must be revalidated against the Scolefin 45 B 20-9 certificate of analysis.
| Component | F1 | F2 | F3 |
|---|---|---|---|
| PP impact copolymer matrix | 82.0 wt% | 76.0 wt% | 68.0 wt% |
| Talc | 15.0 wt% | 20.0 wt% | 25.0 wt% |
| Ethylene-octene elastomer | 2.0 wt% | 2.5 wt% | 4.0 wt% |
| MAH-g-PP | 0.7 wt% | 1.0 wt% | 2.0 wt% |
| Antioxidant/HALS | 0.3 wt% | 0.5 wt% | 1.0 wt% |
On production-scale injection moulding cells, talc loadings above 25 wt% reduce melt elasticity and generate tiger stripes at flow fronts in thin rib sections, while elastomer levels above 15 wt% increase odour and fogging because of process oil carryover. Mold flow analysis must be run with jetting and weld-line predictions for parts with visible surfaces, because Scolefin 45 B 20-9 PP Copolymer, like other high-flow impact copolymers, exhibits reduced melt strength at low-depth ribs. Finished components include door panel lower substrates, glove box housings, centre console side covers, B-pillar lower trims, and map pockets where grain depth between 15 µm and 35 µm must be replicated without gloss variation above 1.5 GU.
Continuous compression moulding lines for tethered polyethylene and polypropylene closures convert Scolefin 45 B 20-9 PP Copolymer into one-piece or two-piece closures with hinge thicknesses from 0.25 mm to 0.45 mm and tamper-evident band wall sections below 0.60 mm. Under the European Single-Use Plastics Directive 2019/904 Article 6, beverage containers with a capacity up to 3 L must retain closures attached to the container during use, which requires the tether to sustain flexural fatigue without stress whitening at thickness reduction points. The formulation for closure compounds typically includes a nucleating masterbatch at 0.05 wt% to 0.20 wt% to increase crystallisation temperature and reduce cycle time, a slip/erb masterbatch at 0.03 wt% to 0.08 wt% to control removal torque, and a colour masterbatch at 0.5 wt% to 1.5 wt% for tinted or white closures. Process parameters on rotary compression moulding equipment use melt temperatures between 190 °C and 220 °C, lower than extrusion blow moulding grades because extended residence time at 230 °C accelerates molecular weight degradation and closure hinge failure. Clamp force settings are typically between 800 kN and 1,200 kN, with mould cooling channel temperature maintained at 10 °C to 20 °C to achieve demoulding without ovalling. End product types include carbonated soft drink closures, aseptic dairy caps, pharmaceutical measuring closures, and child-resistant caps where dimensional tolerance on the thread diameter is held at ±0.08 mm. Compliance is verified under EU 1935/2004 and FDA 21 CFR 177.1520 for food-contact use; for pharmaceutical packages, EU Pharmacopoeia 3.1.3 and USP 661 may additionally apply. Published lot-specific data for the Scolefin 45 B 20-9 designation should be checked for organoleptic neutrality before use in high-temperature pasteurised dairy closures.
The substitution of high-density polyethylene with Scolefin 45 B 20-9 PP Copolymer in rigid logistics crates is governed by stacking load capacity, dimensional stability after outdoor exposure, and the melt-flow ratio of virgin to post-consumer recyclate. Compliance frameworks include EN 840-1 for two-wheeled mobile waste containers, ISO 8611-1 for pallet load and deflection under racking, and RAL-GZ 951 for recycled content verification in distribution packaging. Formulation additions on production lines typically contain post-industrial or post-consumer PP regrind at 20 wt% to 50 wt%, a hindered amine light stabiliser masterbatch at 0.2 wt% to 0.5 wt%, a primary/secondary antioxidant masterbatch at 0.1 wt% to 0.3 wt%, and carbon black masterbatch at 0.5 wt% to 2.0 wt% for UV protection in external storage. Injection moulding of crates with wall sections between 3.0 mm and 6.0 mm is performed on machines with clamp forces from 12,000 kN to 30,000 kN, using melt temperatures of 220 °C to 240 °C and mould temperatures from 15 °C to 30 °C. Feeding of recycled flake above 30 wt% without melt filtration at mesh apertures below 100 µm raises weld-line failure rates at the base-to-sidewall intersection. Pre-drying of hygroscopic post-consumer regrind at 80 °C for 2 h to 4 h is required when moisture exceeds 0.1 wt%, and vented screws with L/D ratios of 24:1 to 28:1 are used to reduce volatile build-up on the mould surface. End product types include folding beverage crates, agricultural transport trays, retail distribution crates, kerbside waste bins, and injection-moulded pallets with top deck loads above 1,000 kg when tested under ISO 8611-1. Published load-aging data for the Scolefin 45 B 20-9 designation is limited in high-acid or high-alkaline recyclate streams, so the grade should be restricted to processes with documented melt-flow rate preservation above 12 g/10 min after regrind blending.
In horizontal-axis washing machine outer tubs, Scolefin 45 B 20-9 PP Copolymer is formulated with talc concentrate additions between 10 wt% and 30 wt% to raise flexural modulus and reduce creep at spin speeds above 1,200 min⁻¹. The compliance environment for appliance parts requires glow-wire resistance under IEC 60695-2-11 with a temperature of 650 °C for unattended appliances above 0.3 A according to IEC 60335-1 clause 30.2.2, as well as ball-pressure testing under IEC 60695-10-2. A coupling agent masterbatch at 1 wt% to 2 wt% is used to maintain impact strength after talc dispersion, and an acid-neutralising stabiliser masterbatch at 0.1 wt% to 0.3 wt% addresses pH excursions from detergent residues with pH values between 9 and 11. Injection moulding is carried out with melt temperatures from 220 °C to 240 °C, mould temperatures of 30 °C to 50 °C to limit sink marks around bearing seats, and sequential valve gating to eliminate weld lines near the tub spider interface. Clamp force requirements exceed 10,000 kN for large-diameter outer tubs with projected area above 3,000 cm². On production scale, out-of-balance rings moulded from the same base material show that talc loadings above 30 wt% reduce screw recovery and increase abrasive wear on screw flights and check rings, requiring nitrided or bimetallic barrel coatings. Detergent contact ageing at 90 °C in 0.1% alkaline solution for 500 h is used as an internal screening method, but published data for the Scolefin 45 B 20-9 designation under these conditions is limited and must be generated on finished parts. End product types include washing machine outer tubs, balance rings, dryer impellers, dishwasher spray arms, and drain pump housings where dimensional tolerance on bearing bores is held within ±0.15 mm.
Flame-retardant compounds based on Scolefin 45 B 20-9 PP Copolymer are used for injection-moulded battery separator frames, e-bike battery enclosures, and power tool housings where the base resin is modified with an intumescent ammonium polyphosphate system at 20 wt% to 30 wt%, chopped glass fibre at 10 wt% to 20 wt%, and maleic anhydride-grafted PP coupling agent at 1 wt% to 2 wt%. The flame-retardant masterbatch must be pre-dried at 80 °C for 2 h to 4 h when packaging exposure exceeds 0.05% moisture, because moisture uptake above that threshold causes surface silver streaks and inconsistent UL 94 ratings. Process temperatures are maintained between 200 °C and 230 °C; prolonged residence above 240 °C or high-shear screw configurations with compression ratios above 2.5:1 can degrade the intumescent system and liberate acidic species that corrode mould surfaces. The compliance stack for e-bike battery enclosures includes IEC 62133-2 for mechanical abuse and thermal cycling, UL 94 V-0 at 3.0 mm nominal thickness, and IEC 62368-1 for charging station enclosures. For power tool housings, drop impact tests derived from IEC 60068-2-31 and dimensional stability after heat ageing at 70 °C for 7 days are commonly used to verify boss and snap-fit integrity. The use of amine-based processing aids is incompatible with ammonium polyphosphate intumescents because premature acid-base interaction reduces flame retardancy and can generate odour during moulding. End product types include battery pack separator frames, e-bike battery enclosures, power tool motor housings, charging adapter shells, and electrical enclosure covers. Halogen-free formulation compositions must be verified for UL Yellow Card listing at the final part thickness, and the specific Scolefin 45 B 20-9 designation cannot be assumed to achieve V-0 without the addition of a recognised flame-retardant masterbatch.
| Part category | Standard designation | Test parameter | Threshold |
|---|---|---|---|
| E-bike battery enclosure | IEC 62133-2 | Mechanical shock and thermal cycling | no fire, leakage, or explosion |
| Power tool housing | UL 94 | Vertical burn | V-0 at 3.0 mm |
| Charging adapter shell | IEC 62368-1 | Fire enclosure and thermal controls | as defined by standard |
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Scolefin 45 B 20-9 PP Copolymer is designated as a reactor-grade heterophasic propylene-ethylene impact copolymer. The material belongs to the medium-flow polypropylene family in which a dispersed ethylene-propylene rubber phase is generated during sequential polymerization rather than through post-reactor melt compounding. The alphanumeric structure 45 B 20-9 is supplier-specific: the B segment indicates a block/impact copolymer architecture, while the numerical sequence 20-9 is conventionally read by processors as a nominal melt mass-flow rate class of 20 g/10 min measured under ISO 1133-1:2022 at 230 °C with a 2.16 kg piston load. The final suffix 9 is not defined by a universal ISO coding convention and must be verified against the producer’s certificate of analysis. Published data for this specific commercial suffix configuration is limited; therefore, this description separates certified lot data from class-typical values for 20 g/10 min heterophasic PP impact copolymers.
Commercial PP impact copolymers in the 20 g/10 min melt flow band are typically specified where thin-wall injection moulding economics intersect with low-temperature ductility requirements. The heterophasic architecture reduces brittle failure at sub-zero service temperatures relative to PP homopolymer while retaining higher tensile modulus than many elastomer-rich random copolymer grades. Class-typical values place tensile stress at yield between 22 MPa and 27 MPa under ISO 527-2:2012 at a test speed of 50 mm/min on Type 1A specimens, and flexural modulus between 1,100 MPa and 1,400 MPa under ISO 178:2019 at 2 mm/min. Density is expected near 0.900 g/cm³ to 0.910 g/cm³ under ISO 1183-1:2019, reflecting the ethylene-rich dispersed phase. These values are class reference ranges, not certified lot values for Scolefin 45 B 20-9.
In heterophasic propylene-ethylene impact copolymers, the ethylene-propylene rubber phase exists as discrete domains within a semicrystalline polypropylene matrix. The in-reactor route produces a narrower rubber particle size distribution than post-reactor blending of PP homopolymer with metallocene elastomer masterbatch. That morphological consistency reduces lot-to-lot variation in notched impact performance and weld-line strength. Homopolymer PP grades with comparable melt flow typically exhibit higher tensile modulus and surface hardness but fail brittlely below 0 °C, especially in parts with sharp radii or flow-induced weld lines. Random propylene-ethylene copolymers distribute ethylene more uniformly in the chain, lowering crystallinity and improving optical clarity, but their low-temperature impact resistance remains below that of a well-designed heterophasic system.
The Scolefin 45 B 20-9 grade should therefore be positioned for opaque or pigmented technical parts where impact resistance at -20 °C is more important than transparency. The dispersed rubber phase also reduces the effective modulus relative to PP homopolymer by 15 % to 30 %, depending on ethylene content and rubber domain volume fraction. Designers converting from homopolymer must therefore increase wall thickness or rib density when stiffness-limited deflection criteria are retained. Conversely, conversion from random copolymer to Scolefin 45 B 20-9 generally improves low-temperature ductility with acceptable loss of gloss and transparency.
During high-volume injection moulding of the 20 g/10 min class, the material is commonly processed with a barrel temperature profile from 220 °C at the feed throat to 250 °C at the nozzle. Melt temperature measured by needle pyrometer should be held between 230 °C and 250 °C. Mould temperature is maintained between 20 °C and 60 °C; the lower range favours dimensional stability and fast cycle time, while the upper range improves weld-line strength and reduces frozen-in orientation. Holding pressure is typically set at 40 % to 60 % of available hydraulic injection pressure until gate freeze is complete, with screw rotation speed between 60 rpm and 120 rpm depending on screw diameter. General-purpose PP screws with 20:1 to 24:1 L/D and compression ratio between 2.5:1 and 3.0:1 are adequate for this grade class.
Drying is generally unnecessary for resin supplied in sealed, moisture-protected packaging. If storage has occurred at relative humidity above 60 % or visible condensation is present, drying at 80 °C for 2 h to 4 h in a desiccant dryer with dew point equal to or below -30 °C is recommended. Residual moisture above 0.05 % by weight can generate surface splay, nozzle drool, and internal voiding in thick bosses. Hot-runner systems should be externally heated and balanced; valve-gated hot runners are preferred for large automotive trims to avoid stringing and gate blush caused by the rubber phase.
The incoming-quality laboratory should verify melt mass-flow rate, density, tensile yield stress, flexural modulus, and notched Charpy impact on each lot unless a supplier-managed certificate of conformance is contractually accepted. Specimens should be conditioned for 88 h at 23 °C and 50 % relative humidity under ISO 291:2008 before mechanical testing, except where the test method specifies otherwise. The following table provides the class-typical property band for 20 g/10 min heterophasic PP impact copolymers. It is not a substitute for the producer’s technical datasheet.
| Property | Test method and condition | Class reference range |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022, 230 °C, 2.16 kg | 17–23 g/10 min |
| Density | ISO 1183-1:2019, method A | 0.900–0.910 g/cm³ |
| Tensile stress at yield | ISO 527-2:2012, Type 1A, 50 mm/min | 22–27 MPa |
| Tensile elongation at yield | ISO 527-2:2012, Type 1A | 5–8 % |
| Flexural modulus | ISO 178:2019, 2 mm/min | 1,100–1,400 MPa |
| Notched Charpy impact, 23 °C | ISO 179-1:2010/1eA | 8–15 kJ/m² |
| Notched Charpy impact, -20 °C | ISO 179-1:2010/1eA | 3.5–6 kJ/m² |
| Heat deflection temperature, 0.45 MPa | ISO 75-2:2013, method Bf | 75–85 °C |
| Vicat softening temperature, A50 | ISO 306:2022 | 145–155 °C |
Lot-specific MFR should be reported with the test temperature and load because the value is strongly dependent on measurement conditions. For PP impact copolymers, MFR alone does not define the rubber phase molecular weight or particle size distribution; two lots with identical MFR can exhibit different notched Charpy impact at -20 °C. The incoming laboratory should therefore maintain a reduced-frequency protocol that includes notched Charpy impact and flexural modulus testing at every third or fifth lot when the supply chain has been qualified. The ISO 179-1:2010/1eA method uses a 4 J pendulum on notched 80 mm × 10 mm × 4 mm specimens and reports impact strength in kJ/m². Specimens should be notch-broached after conditioning to avoid plasticization effects from cooling fluids.
Application contexts for this material class include automotive interior substrate panels, appliance housing brackets, battery casings, electrical enclosure covers, and industrial containers. In automotive cowl-side trims and door panel inserts, the material is selected when the part must survive airbag deployment at low temperature without fragmenting. Such parts are typically validated using notched Charpy impact below -10 °C combined with multiaxial impact testing according to ASTM D3763-18 or equivalent in-house methods. Appliance drum counterweights and washing machine tub covers use the same MFR band because the material fills 2.0–3.0 mm walls at acceptable cycle times while resisting cracking from out-of-balance vibration.
For components that experience impact at -20 °C or below, heterophasic PP copolymers are preferred over homopolymer and random copolymer grades even when the design nominally requires higher modulus. The stiffness shortfall can be corrected through ribbing, thickness distribution, or mineral reinforcement, whereas the impact performance of a homopolymer cannot be corrected without elastomer addition. Scolefin 45 B 20-9 is therefore a candidate when the application requirement is notched Charpy impact of at least 3.5 kJ/m² at -20 °C and the design can accept a flexural modulus between 1,100 MPa and 1,400 MPa. Parts requiring notched Charpy impact above 15 kJ/m² at -20 °C or flexural modulus above 1,800 MPa are outside the typical class reference band and should not be substituted without lot-specific validation.
Compared with elastomer-compounded grades, reactor-made impact copolymers usually offer better lot consistency, lower volatile content, and fewer screw-slippage problems during dry blending because no external elastomer masterbatch is added. Compared with mineral-filled PP, the unfilled heterophasic product offers lower density, better surface appearance, and higher weld-line strength, but reduced flexural modulus and higher mould shrinkage. Mould shrinkage for the 20 g/10 min class is typically 0.9 % to 1.3 % parallel and 0.8 % to 1.2 % perpendicular under ISO 294-4:2018. Tool designers should apply these ranges only after confirming lot-specific values, because shrinkage is sensitive to part geometry, packing pressure, and mould temperature.
Regulatory compliance for Scolefin 45 B 20-9 is formulation-dependent and cannot be assumed from the base polymer class alone. The following matrix identifies the applicable verification standards and boundaries for typical electrical, automotive, and food-contact supply chains.
| Regulation or standard | Verification criterion | Boundary |
|---|---|---|
| RoHS Directive 2011/65/EU as amended by (EU) 2015/863 | Maximum 0.1 % by weight in homogeneous material for lead, mercury, hexavalent chromium, PBB, PBDE, and four phthalates; maximum 0.01 % for cadmium | Electrical and electronic components only |
| REACH Regulation (EC) No 1907/2006 | Article 33 SVHC communication and Annex XVII restriction compliance | All EU industrial supplies, lot-specific |
| FDA 21 CFR 177.1520 | Olefinic polymers for food contact; additive and overall migration limits apply | Food-contact packaging only upon supplier confirmation |
| ISO 11469:2016 | Marking code PP for recycling | Not a performance standard |
| ISO 1043-1:2011 | Designation basis for propylene polymers | Quality management and specification |
For appliance and automotive interior applications, the processor should request a lot-specific certificate of analysis containing MFR, tensile yield stress, flexural modulus, and notched Charpy impact measured under the methods listed above. Incoming inspection should compare these values against internal specification limits derived from the part’s structural requirement, not against class reference bands alone. For applications involving continuous contact with automotive fluids, detergents, or oils, chemical resistance testing under ISO 175:2010 is recommended before substitution. The absence of a universal suffix definition for the 9 position in Scolefin 45 B 20-9 means that any substitution decision must be made with the supplier’s certified technical datasheet, lot-specific certificate, and processing trial results on the intended tool.
