| HS Code | 670876 |
| Density | 1.05 g/cm³ |
| Melt Flow Rate 230 C 2 16 Kg | 10 g/10 min |
| Tensile Stress At Yield | 25 MPa |
| Elongation At Break | 50% |
| Flexural Modulus | 2200 MPa |
| Charpy Impact Strength Notched 23 C | 35 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 110 °C |
| Heat Deflection Temperature 1 8 Mpa | 60 °C |
| Shore D Hardness | 65 |
| Vicat Softening Temperature | 150 °C |
As an accredited Scolefin 62 T 20-0 PP Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Scolefin 62 T 20-0 PP Copolymer is packaged in 25 kg sealed polyethylene-lined bags, with 40 bags per pallet, totaling 1000 kg. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized bags of Scolefin 62 T 20-0 PP Copolymer, secured and ventilated for safe transport. |
| Shipping | Scolefin 62 T 20-0 PP Copolymer is supplied as solid polypropylene pellets in sealed bags or bulk packaging. It is non-hazardous for transport, though shipments should be protected from moisture, direct heat, and prolonged UV exposure. Loads require clean, dry containers with adequate ventilation to prevent condensation during transit. |
| Storage | Store Scolefin 62 T 20-0 PP Copolymer in its original, closed container in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep away from strong oxidizing agents and moisture. Maintain moderate temperatures and ensure good ventilation. Use proper labeling and keep out of reach of unauthorized personnel. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored in original, unopened packaging under cool, dry conditions. |
Controlling anisotropic shrinkage in lower B-pillar and C-pillar trims moulded from Scolefin 62 T 20-0 PP Copolymer requires pre-mould simulation that accounts for talc platelet orientation. The grade carries a nominal talc loading of 20 wt% in a heterophasic polypropylene copolymer matrix, with the numeric code 62 corresponding to a melt flow rate of 62 g/10 min when determined in accordance with ISO 1133-1:2022 at 230 °C and 2.16 kg. Talc platelets orient parallel to the melt front during filling, which produces longitudinal and transverse shrinkage differentials commonly reported in the range of 0.8% to 1.0% and 0.9% to 1.2% respectively under ISO 294-4 plaque conditioning. Warpage of trim parts with wall thickness transitions greater than 25% is therefore managed by placing gates at the largest cross-section and by avoiding direct flow from a thin living hinge into a thick boss. Hot-runner valve-gate systems with a gate diameter of at least 1.0 mm per 1.5 mm nominal wall thickness are specified to prevent premature freeze-off and to maintain a stable melt cushion. Barrel temperatures from feed to nozzle are set between 200 °C and 230 °C, with a tool surface temperature of 30 °C to 50 °C. Lower tool temperatures reduce cycle time but increase skin-layer stress and can cause visible silver streaking around ribs. Injection speed is held between 100 mm/s and 180 mm/s, with hydraulic packing pressure of 60 MPa to 80 MPa and a holding time of 6 s to 10 s for a part weight of 250 g to 400 g. Production-scale clamp force is derived from projected area: 2.0 kN/cm² to 2.5 kN/cm² is sufficient for multi-cavity trim tools, but higher force settings are reserved for tools with deep draw sections. Sink marks over ribs and mounting bosses are minimised when rib thickness does not exceed 40% to 50% of the adjacent wall, and when local mass at the boss is relieved by a core hole. Compliance for visible interior trim requires VOC and odour performance verified in accordance with VDA 278, DIN 75201 B, and VDA 270 B3 because talc-filled PP copolymers can retain low-molecular-weight fractions that contribute to interior fogging. The talc ratio is fixed at 20 wt% and is checked by ISO 3451-1; blending with unfilled PP copolymer is possible but alters shrinkage and impact behaviour unpredictably and is not recommended for grained visible trim. End-use parts are lower pillar covers, C-pillar lower trims, luggage side panels, and seat surround shrouds. The material is not specified for airbag deployment chutes unless the specific tear propagation behaviour at -30 °C has been validated against the OEM deployment specification.
Short-shot formation at the brass insert boss is the dominant failure mode on production-scale moulding of washing-machine drain pump housings. Scolefin 62 T 20-0 PP Copolymer is processed at a melt temperature of 210 °C to 240 °C and a mould temperature of 35 °C to 55 °C. The lower end of the melt-temperature window is used only when the tool incorporates a heated sprue bushing and direct valve-gate sequencing. The 20 wt% talc loading increases thermal conductivity relative to unfilled PP, which reduces cooling time but increases the risk of a frozen layer forming around inserts before the packing phase is complete. For a pump housing wall of 2.5 mm to 3.0 mm, a packing pressure of 50 MPa to 70 MPa is maintained until the gate seal time is reached. Gate seal time is typically between 8 s and 14 s depending on gate geometry. The hydraulic clamp force is set at 2.0 kN/cm² to 2.4 kN/cm² of projected area for tools with two to four cavities. Weld lines formed downstream of heated inserts are evaluated for burst pressure because talc orientation reduces outer-fibre elongation at the weld interface. Published burst-pressure data for this specific pump geometry are limited, so hydrostatic validation on the moulded part is mandatory. Pre-drying is required only when sacks are opened in ambient relative humidity above 60% or when visible condensation is present. Drying is performed at 80 °C for 2 h to 3 h in a desiccant dryer with dewpoint below -20 °C. Compliance for the electrical insulation around the pump winding is typically assessed under IEC 60335-1 clause 29 for creepage and clearance. The material is not specified for direct contact with potable water unless the national certification body has approved the specific formulation. The terminal housing is a cold-side drain pump body for European front-loader platforms. The use of regranulated material is limited to 10 wt% if creep-ageing data for 1000 h at 70 °C are not available. If such data are generated, a mixture of 90 wt% virgin compound and 10 wt% closed-loop regrind is the practical upper boundary because talc fines and PP chain scission from repeated heat histories reduce the notched Charpy impact value measured according to ISO 179-1/1eA by more than 10% after three heat histories. The design rule is to move weld lines away from threaded inserts and to avoid continuous hot-water contact above 80 °C because oxidative degradation of the PP matrix accelerates above that threshold and can cause brittle fracture around the pump outlet barb.
Distribution-box bases, meter housings, and terminal covers moulded from Scolefin 62 T 20-0 PP Copolymer are qualified under a non-flame-retardant UL classification. The nominal 20 wt% talc loading improves sag resistance at elevated service temperatures but the material alone does not achieve UL 94 V-0 at wall thicknesses below 3.0 mm unless a specialised flame-retardant additive package has been compounded into the specific grade variant. Glow-wire testing to IEC 60695-2-11 is therefore limited to configurations where a temperature of 650 °C is applied for 30 s to a final enclosure thickness and where the part does not ignite. If metal-thread inserts housed in the enclosure require glow-wire testing, the press operator must verify that no afterflame exceeds the certification-defined maximum. The comparative tracking index measured according to IEC 60112 is normally reported between 500 V and 600 V for talc-filled PP copolymers. This restricts use to insulation coordination categories that do not require a CTI above 600 V for pollution degree 3. Tooling uses direct edge gates or fan gates with a land length of 0.8 mm to 1.2 mm and a gate width of 3.0 mm to 5.0 mm. A barrel profile of 190 °C to 220 °C and a mould-cooling water setpoint of 25 °C to 40 °C keep the moulding cycle within 35 s to 60 s for parts up to 600 g. End-use products are low-voltage distribution-box bases, meter terminal covers, and ABS-substitution brackets located outside the arcing zone.
| Property | Test method | Boundary for electrical enclosures |
|---|---|---|
| Glow-wire classification | IEC 60695-2-11 | 650 °C for 30 s; no ignition of final part |
| Comparative tracking index | IEC 60112 | 500 V to 600 V typical; no live parts in pollution degree 3 above 600 V |
| UL flammability | UL 94 | HB only; not V-0 without FR additive package |
| Water absorption | ISO 62 | Grade-specific verification required at 23 °C saturation |
Scolefin 62 T 20-0 PP Copolymer is injection moulded with a wall thickness of 2.5 mm to 3.5 mm for foldable returnable crates and pallet boxes when the logistics loop demands column stacking of 600 kg or more. The material is supplied with a fixed talc content of 20 wt%, and the practical let-down ratio with closed-loop regrind is maintained at 70 wt% virgin compound to 30 wt% in-house regrind. A higher regrind fraction shifts the melt flow rate upward because repeated shear heat histories cause chain scission and reduce the low-temperature impact response measured by ISO 179-1/1eU at -20 °C. Processing on large-tonnage machines with a screw diameter of 80 mm to 120 mm and an L/D ratio of 22:1 to 24:1 requires back pressure of 3 MPa to 6 MPa to maintain talc dispersion and avoid gas entrapment. Melt temperature should not exceed 250 °C because talc-accelerated oxidation can generate surface splay and increase odour in the return loop. Airtight stacking is achieved by ribbing the corner columns and by maintaining local wall-thickness reductions below 20% from the nominal wall to avoid distortion after demoulding. Compliance with REACH and Directive 94/62/EC is checked at the article level. The grade has no intentionally added heavy-metal stabiliser package. Terminal products are returnable automotive logistics containers, non-ventilated folding crates, and collapsible pallet boxes.
Because talc-filled PP copolymers exhibit reduced weld-line stress retention compared with unfilled PP matrices, condensate drain pans for HVAC units are designed with flow leaders that relocate weld lines away from pressure-concentrating zones. The component is moulded with a wall thickness of 3.0 mm to 4.0 mm, and the gate is placed at the lowest point of the drain pan so that the melt front rises uniformly toward the sidewall. The talc loading of 20 wt% provides the required sag resistance during continuous exposure to 23 °C to 50 °C condensate. The material is not specified for continuous contact with alkaline coil-cleaning concentrates above pH 9 without chemical-resistance testing of the final part. Mould temperature is held between 40 °C and 60 °C to minimise frozen-in stress. The moulding cycle is extended by 10 s to 15 s relative to unfilled PP to allow the thick reinforcement ribs to cool without sink. Compliance for North American HVAC equipment is evaluated under UL 60335-2-40, while European installations reference EN 60335-2-40. End-use terminal products are condensate collection trays, secondary drain pans, and mounting brackets for evaporator coils.
The base polymer system in Scolefin 62 T 20-0 PP Copolymer is not considered inherently UV-stabilised for long-term exterior use. For injection-moulded armrest shells, seat slats, and backrest frames, the compound is let down at the press with a low-migration UV masterbatch at 3 wt% to 5 wt%. Higher addition rates above 6 wt% can shift shrinkage enough to require tool compensation and can reduce weld-line strength. The mixture is processed at a melt temperature of 210 °C to 230 °C and a tool temperature of 30 °C to 50 °C. Thick section changes in armrest bosses are cored to an outer wall of 2.5 mm to 3.0 mm to prevent sink. Accelerated weathering is assessed according to ISO 4892-2:2013 method A with 1500 h of exposure for products intended for Central European seasonal use. Without the UV masterbatch, the exposed surface shows chalking and micro-cracking after fewer than 500 h under the same test conditions. The terminal products are outdoor chair components and table edge profiles, but not structural load-bearing frames where creep under 40 °C continuous load must be documented separately. Compliance for the final assembled furniture is assessed under the General Product Safety Directive where applicable, and the material itself is assessed for REACH SVHC content at article level.
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Scolefin 62 T 20-0 is a polypropylene impact copolymer compound carrying a nominal 20 wt% talc filler loading. The designation identifies the base copolymer series as 62, the mineral type as talc via the letter T, and the primary filler level as 20; the trailing 0 is a formulation variant marker rather than a declaration of a secondary filler. The material is supplied as pelletized compound for injection moulding and selected extrusion operations. The impact copolymer matrix contains a dispersed ethylene-propylene rubber phase, while the talc platelets act as a high-stiffness mineral filler and nucleating agent. This combination places the product between unfilled PP impact copolymer and 40 wt% talc-filled PP compounds in stiffness, shrinkage, and low-temperature toughness. Exact viscosity, density, and mechanical values are controlled by the producer’s certificate of analysis; the class-level data provided here follow the relevant ISO test methods and are presented for engineering comparison rather than as a substitute for lot-specific documentation.
In a 20 wt% talc-filled impact copolymer, the talc platelets increase stiffness and reduce mould shrinkage relative to an unfilled PP impact copolymer, but they also reduce notched Charpy impact and raise density. Class-level data for this material type show tensile modulus values of 1,800–2,300 MPa under ISO 527-2 and flexural modulus values of 1,800–2,400 MPa under ISO 178, compared with 900–1,300 MPa for unfilled impact copolymer. The density rises from 0.90–0.91 g/cm³ to 1.03–1.06 g/cm³ because talc has a specific gravity of approximately 2.7–2.8. The talc phase reduces linear mould shrinkage and improves dimensional stability under load; however, notched Charpy impact strength at 23 °C drops to 4.0–6.5 kJ/m² from values of 20–35 kJ/m² in unfilled impact copolymer. Low-temperature impact remains acceptable for many interior and appliance parts because the impact copolymer matrix maintains elastic deformation at sub-zero temperatures better than a talc-filled PP homopolymer.
| Attribute | Scolefin 62 T 20-0 class-typical | Unfilled PP impact copolymer | 20 wt% talc-filled PP homopolymer | 40 wt% talc-filled PP impact copolymer |
|---|---|---|---|---|
| Density | 1.03–1.06 g/cm³ | 0.90–0.91 g/cm³ | 1.03–1.06 g/cm³ | 1.20–1.24 g/cm³ |
| Melt mass-flow rate (230 °C, 2.16 kg) | 12–20 g/10 min | 12–25 g/10 min | 10–18 g/10 min | 8–15 g/10 min |
| Tensile modulus (ISO 527-2) | 1,800–2,300 MPa | 900–1,200 MPa | 2,000–2,500 MPa | 2,800–3,400 MPa |
| Flexural modulus (ISO 178) | 1,800–2,400 MPa | 900–1,300 MPa | 2,100–2,600 MPa | 3,000–3,800 MPa |
| Notched Charpy impact, 23 °C (ISO 179-1/1eA) | 4.0–6.5 kJ/m² | 20–35 kJ/m² | 3.0–4.5 kJ/m² | 3.0–4.0 kJ/m² |
| Heat deflection temperature, 0.45 MPa (ISO 75-2/B) | 95–110 °C | 75–85 °C | 105–115 °C | 120–130 °C |
Mould shrinkage in mineral-filled polypropylene is driven by platelet orientation, cooling rate, and wall thickness. For a 20 wt% talc-filled impact copolymer, shrinkage values determined on 60 mm × 60 mm × 2 mm plaques according to ISO 294-4 typically fall between 0.6–1.0% parallel to the melt-flow direction and 0.8–1.2% perpendicular to it. The differential is lower than in 40 wt% talc-filled grades because the lower mineral content reduces anisotropic talc orientation near the frozen layer. This characteristic is relevant in rectangular housings and trim panels where edge curvature and boss-tub misalignment must be controlled after 48 h conditioning at 23 °C and 50% relative humidity. To minimize post-mould crystallisation drift, mould temperatures of 20–50 °C are used for untextured surfaces; textured surfaces require 40–60 °C to replicate grain and reduce visible sink over ribs and bosses. Tooling design should use a draft angle of at least 0.5° for deep ribs and avoid abrupt wall-thickness steps greater than 25% of the nominal wall to limit differential shrinkage at the junction.
During injection moulding of Scolefin 62 T 20-0, melt temperature is maintained between 220 °C and 250 °C. Talc-filled impact copolymer does not require aggressive desiccant drying, but surface condensation on cold pellets is removed by drying at 80 °C for 2–3 h when the material has been stored at high relative humidity above 60% or below dew point. A screw with a barrier profile and L/D of 24:1–28:1 provides more uniform talc dispersion than a general-purpose screw; mineral-filled grades processed on short L/D screws below 20:1 can show melt-temperature gradients and flow lines on smooth-tool areas. Back pressure is set between 0.3 MPa and 0.7 MPa hydraulic to disperse the filler without excessive shear heating. Injection velocity should be medium-to-high, and holding pressure is typically 60–80% of the measured peak cavity pressure. Clamp force is estimated at 2.0–2.5 kN/cm² of projected part area. Melt residence time above 240 °C should be kept below 8 min to minimize oxidative chain scission of the ethylene-propylene impact phase; prolonged processing above 260 °C is outside the recommended window.
On production-scale injection moulding machines, shot-size drift and screw recovery time excursions are the most common indicators of screw/barrel wear when running talc-filled grades. Non-return valve leakage of less than 1.0 mm clearance can cause cushion variation above 2 mm; moulding trials on machines with clamp force from 800 kN to 2,500 kN show that maintaining a stable cushion of 3–5 mm reduces short shots and flash at the parting line.
When a 20 wt% talc-filled impact copolymer is selected for instrument panel lower trim, door panel carriers, or glove box substrates, the design must satisfy dimensional, emission, and flammability requirements rather than strength alone. Flexural modulus of 1,800–2,400 MPa under ISO 178 at 23 °C is normally sufficient to limit edge sag of long unsupported panels when tested at 80 °C under instrument panel loading, but published data for this specific configuration should be confirmed with the supplier. Fogging is tested according to VDA 277 or VDA 278; the grade’s volatile and semi-volatile emission profile depends on the antioxidant package and talc purity, so lot-specific data are required for OEM approval. Flammability is assessed by ISO 3795 with a limit of 100 mm/min at 1.5 mm wall thickness in many interior specifications. The material is not a soft-touch skin and should not replace a thermoformed or injected skin layer where haptic requirements apply. If the part is grained, the mould surface temperature should be held at 40–60 °C to maintain grain replication and reduce visible flow lines at the gate.
In appliance structural housings, the grade is evaluated when a UL 94 HB rating at 1.5 mm and a IEC 60335-1 glow-wire ignition temperature of 750 °C on the final part are acceptable. Washing machine detergent compartments, pump bodies, and air-conditioning condensate trays are relevant where the lower warpage of talc-filled impact copolymer relative to glass-fibre-reinforced grades is required. Tensile strength is lower than glass-fibre PP, and creep under constant load at 60 °C must be checked using ISO 899-2. For snap-fit designs, a maximum allowable strain below 0.5% at the root radius is used to avoid stress cracking in the presence of detergents; published data for this specific configuration is limited, so prototype testing under the actual chemical environment is required.
Compared with a 40 wt% talc-filled PP impact copolymer, the 20 wt% grade shows lower flexural modulus, lower heat deflection temperature, and lower density, but it offers better melt flow, reduced screw/barrel abrasion, and less pronounced weld-line weakness. Flexural modulus for the 40 wt% class is typically 3,000–3,800 MPa under ISO 178, while the 20 wt% class is 1,800–2,400 MPa. Weld-line tensile strength retention in a 20 wt% talc-filled impact copolymer is generally higher than in a 40 wt% talc-filled grade because the lower filler volume reduces platelet alignment at the weld interface; however, weld-line strength remains below the bulk tensile strength of 18–24 MPa and must be validated by ISO 527-2 or ASTM D638-14 specimens cut across the weld line. Dart impact resistance measured by ASTM D3763 or ISO 6603-2 shows a higher ductile-to-brittle transition for the impact copolymer base than for talc-filled homopolymer; selection for airbag doors or other impact-loaded panels therefore requires instrumental impact testing at −20 °C and 23 °C.
Against short-glass-fibre PP compounds, the talc-filled impact copolymer gives lower tensile strength and lower notched impact but offers reduced warpage and better surface appearance. Short-glass PP tensile modulus is typically 3,500–5,500 MPa under ISO 527-2, while 20 wt% talc-filled PP is 1,800–2,300 MPa. The talc platelet morphology produces less fibre prominence on smooth-tool surfaces and lower machine abrasion than glass fibre. However, unsupported structural ribs that require high flexural load-bearing are better assigned to a glass-fibre or mineral/glass hybrid grade when the flexural modulus requirement exceeds 3,000 MPa.
For food-contact or potable-water applications, compliance under EU 10/2011 or FDA 21 CFR 177.1520 must be confirmed with the compounder because the talc source, coupling agents, and antioxidant package are grade-specific. The product as supplied is expected to be reviewable for REACH Article 33 SVHC notification and EU 2011/65/EU RoHS recast compliance; automotive approvals may require IMDS entry and conformity with GADSL. The grade is not intended for continuous service above 100 °C under load without a heat-stabilized variant or a documented UL 746B relative thermal index, nor for direct contact with strong oxidizing acids, chlorinated solvents, or ketone-based cleaning agents. Avoid compounding the material with amine-based additives that can interfere with the stabilizer package; talc-filled polypropylene is also prone to scratch whitening, and unpigmented parts exposed to outdoor UV will chalk unless an adequate UV stabilizer system is incorporated. When storage is longer than 12 months, the producer’s recommended revalidation of melt flow and notched Charpy impact is advised before production use.
