Dongguan Shengtai PC/ABS T2300NC is a polycarbonate/acrylonitrile-butadiene-styrene blend supplied by Dongguan Shengtai Plastic Materials Co., Ltd. and positioned primarily for injection moulding. The alphanumeric designation follows supplier internal coding rather than a normative classification; under ISO 1043-1:2011, the material would be marked as >PC+ABS< with the grade code placed outside the standard designation. The suffix NC commonly denotes natural colour in Chinese engineering resin trade contexts, but no independent registration confirms this interpretation for T2300NC. Published data for this specific configuration is limited, so datasheet values from the supplier or an accredited third-party laboratory remain the only safe basis for part design. In the absence of supplier data, an incoming batch should be characterised at minimum by melt volume-flow rate under ISO 1133-1:2022, density under ISO 1183-1:2019, tensile properties under ISO 527-2:2012, flexural modulus under ISO 178:2019, notched impact under ISO 180:2019, and heat deflection temperature under ISO 75-2:2013. For reference, unreinforced PC/ABS injection grades sold in comparable channels typically exhibit melt volume-flow rates of 10 cm³/10 min to 30 cm³/10 min at 260 °C/5 kg; however, that range is not a batch-specific value for T2300NC.

What processing boundary conditions apply to T2300NC?

Moisture control is the first processing boundary. The polycarbonate phase undergoes hydrolytic chain scission when residual moisture exceeds 0.02 % during plastication. A desiccant dryer with closed-loop regeneration and a dew point of -30 °C or lower is required. Drying at 80 °C to 100 °C for 3 h to 4 h is a common starting point for natural PC/ABS, but batch-specific drying curves should be established because pellet size, regrind content, and ambient humidity shift drying time. At relative humidity above 60 %, hopper covers and dry-air conveying are necessary to avoid moisture regain before the feed throat. Melt temperature measured at the nozzle is typically selected in the 240 °C to 280 °C band. Higher melt temperature improves weld-line strength but increases the risk of ABS-phase thermal yellowing and polycarbonate degradation. Mould temperature should be maintained between 60 °C and 90 °C; mould temperatures below 60 °C reduce surface replication and can increase frozen-in orientation. Screw back pressure between 3 bar and 8 bar is common for colour dispersion and melt homogeneity, but excessive shear heating from high back pressure or high screw rotation can lower impact resistance. A general-purpose screw with an L/D ratio of 18:1 to 22:1 and a compression ratio of 2:1 to 2.5:1 is adequate; vented barrels are not normally required once predrying is correct. Production-scale failures observed on injection lines for similar PC/ABS grades include splay, delamination at the gate, brown streaks originating from hot-runner dead spots, and intermittent jetting when the injection speed profile is not optimised. These are operational checks, not substitutes for a supplier-issued processing guide for T2300NC.

Thermal and mechanical screening data for unfilled PC/ABS

Because T2300NC-specific values are not public, the following table records representative ranges reported for unfilled PC/ABS injection grades in producer literature. The ranges serve as screening values for tool design and material interchange only; they must not be copied into a part drawing for T2300NC without confirming against the supplier’s certificate of analysis.

The overlap between ABS and PC/ABS in flexural modulus is substantial, but the practical distinction for an unfilled PC/ABS such as T2300NC is more likely to appear in the combination of heat deflection temperature and notched impact at wall thicknesses below 3 mm. When the supplier cannot provide a lot-specific heat deflection temperature result, a comparative test under ISO 75-2:2013 at 0.45 MPa should be performed before replacing ABS in a load-bearing interior bracket. Equally, if T2300NC is being considered as a lower-cost alternative to polycarbonate, the reduction in heat deflection temperature is not a minor substitution risk: the difference between unfilled PC and unfilled PC/ABS can exceed 20 °C under the same loading. This difference is not a defect; it is a design boundary.

When T2300NC replaces ABS, PC, or mineral-filled PP

Direct substitution of unpainted ABS without tooling modification is not automatically valid. Unfilled ABS typically exhibits mould shrinkage of 0.4 % to 0.7 % under ISO 294-4:2018, while unfilled PC/ABS is often in a similar numerical range but can shift with wall thickness, mould temperature, and flow length. For close-tolerance components, a pre-production shrinkage study on the actual T2300NC lot is required. The more significant shift from ABS to PC/ABS is thermal: generic ABS heat deflection temperature at 0.45 MPa lies between 85 °C and 100 °C, whereas generic PC/ABS lies between 95 °C and 120 °C. That increase can permit use in automotive interior panels that experience upper-surface temperatures near 90 °C or in appliance housings adjacent to resistive heating elements, provided the specific grade is qualified for those conditions.

Substitution from polycarbonate should be evaluated through flow length and chemical resistance, not only through mechanical strength. Unfilled PC typically offers heat deflection temperature at 0.45 MPa of 125 °C to 140 °C and notched Izod impact above 60 kJ/m², but it often requires higher melt temperatures and can exhibit higher melt viscosity. PC/ABS grades lower the processing temperature and improve resistance to stress cracking from certain oils and cleaning agents, but they also reduce continuous-use thermal capability. If the service environment exceeds 100 °C under mechanical load for extended periods, the substitution of T2300NC for PC should not proceed without creep and thermal ageing data. Published data for this specific configuration is limited, and therefore end-use validation must be performed on production-spec mouldings rather than extrapolated from generic PC/ABS behaviour.

Replacement of mineral-filled PP with T2300NC should be driven by high-temperature dimensional stability and impact requirements, not by stiffness alone. Polypropylene compounds containing 20 wt% talc can exhibit flexural moduli above 3000 MPa under ISO 178:2019, which exceeds the lower end of unfilled PC/ABS. However, mineral-filled PP may show lower notched impact at room temperature and greater stiffness loss at elevated temperature. Unfilled PC/ABS can provide a more balanced combination of impact and heat resistance, but the material cost and density are generally higher. Where a housing is simply replacing a stiff mineral-filled PP part and the current service temperature remains below 80 °C, the economic case for changing to T2300NC may be weak. Where the part is failing due to reduced modulus at 90 °C or brittle fracture at low temperature, then a PC/ABS grade may resolve the failure mode. A direct comparison of dimensional stability, coefficient of linear thermal expansion under ISO 11359-2:2021, and notched impact under ISO 180:2019 should be made using T2300NC plaques moulded at the production thickness.

Regulatory compliance matrix for supplied pellets

Compliance statements for T2300NC must be verified through documentation from Dongguan Shengtai or an authorised distributor. Absence of a test report for a specific substance should not be interpreted as absence of the substance. The matrix below identifies common requirements for engineering resin pellets sold into electrical, automotive, and appliance supply chains.

For moulded parts intended for automotive interiors, additional standards may apply, including odour, fogging, and volatile organic compound limits under OEM-specific methods rather than a single ISO specification. T2300NC should not be listed on an automotive material database without an accompanying production-lot test report. For electrical enclosures, creepage and clearance dimensions are unaffected by the polymer grade but the comparative tracking index under IEC 60112:2020 may influence material selection when minimum creepage distances are reduced by printed circuit board design. If the grade is supplied as natural colour, end-user-added colour masterbatch can alter flammability, tracking resistance, and mechanical properties; therefore flame-retardant and electrical ratings must be revalidated on the final coloured compound, not assumed from the natural resin data.

Before mould commissioning, the first production lot should be fingerprinted using melt viscosity data across a relevant shear-rate range, obtained by capillary rheometry or injection-machine pressure-drop measurement. A batch-to-batch comparison should include melt volume-flow rate, ash content, moisture, and a standard mechanical test series. The process window for hot-runner systems should be mapped with shot-to-shot temperature variation at the nozzle below ±5 °C. Where the part contains weld lines, a photographically documented short-shot series should establish whether the weld-line position shifts when the T2300NC lot changes. Incoming quality control limits should be derived from the supplier’s certificate of analysis and from the processor’s own capability study; generic PC/ABS literature values are insufficient to control production risk for a product-specific grade such as Dongguan Shengtai PC/ABS T2300NC.