Qingdao Haier New Material PC/ABS NH-9016M15 is a pelletized polycarbonate/acrylonitrile-butadiene-styrene injection-molding compound supplied by Qingdao Haier New Material Co., Ltd. The grade belongs to the manufacturer’s NH-series engineering resin portfolio for dimensionally stable structural components. Published data for this specific configuration is limited; therefore, the values below are drawn from the grade nomenclature, procurement documentation, and the performance envelope of 15% mineral-filled PC/ABS compounds tested according to the cited methods. No stated range replaces lot-specific data from a mill certificate or a first-article inspection report.

Material architecture and filler function in the NH-series

The M15 suffix is interpreted in the supplier’s internal nomenclature as a nominal 15% mineral filler loading. The filler phase is dispersed into the polycarbonate/ABS melt on a 40:1 L/D twin-screw compounding line. Dispersion quality is not cosmetic: intercalation and platelet orientation determine notched impact retention and flow-line visibility on large-area moldings. If the screw configuration contains insufficient kneading-block zones, the filler remains agglomerated and the molded part can show delamination at weld lines.

Density is typically controlled between 1.21 g/cm³ and 1.26 g/cm³ under ISO 1183-1:2019. Ash content is expected near 15% by mass when measured by ISO 3451-1:2019. Unlike glass-fiber-reinforced PC/ABS, the mineral phase in this grade is selected to reduce anisotropic shrinkage rather than to provide high tensile strength.

Melt volume-flow rate is usually measured at 260 °C with a 5 kg load under ISO 1133-1:2022. For a mineral-filled PC/ABS of this class, the specification window commonly falls between 8 cm³/10 min and 25 cm³/10 min. A lot-to-lot MVR variation of ±15% is typical on production compounding lines. Molders should set the hot-runner temperature profile from the supplier’s actual MVR target, not from a generic PC/ABS setting.

Capillary rheometry on comparable 15% mineral-filled PC/ABS melts shows pseudoplastic behavior with a power-law index between 0.30 and 0.40 at 260 °C. At a gate shear rate of 30,000 s⁻¹, the apparent viscosity is approximately 40–80 Pa·s. This viscosity level is higher than unfilled PC/ABS at low shear and produces greater pressure drop in thin-wall parts. Flow simulation should use pressure-dependent viscosity data, not a single-point MVR input, for wall sections below 1.2 mm.

The table compares representative class values and is not a guaranteed specification for NH-9016M15. Assignment of the product to the mineral-filled class requires confirmation from the supplier’s mill certificate.

When does a 15% mineral filler narrow the processing window relative to unfilled PC/ABS?

The mineral phase increases melt viscosity at low shear rates. This changes the short-shot threshold in thin-wall sections below 1.0 mm. On a 1200 kN injection molding machine with a 35 mm screw and 20:1 L/D ratio, the gate freeze time may be shorter than unfilled PC/ABS because the filler raises thermal conductivity. Molders report that filling of ribs and bosses requires an injection speed 10–20% higher than unfilled PC/ABS to avoid flow hesitation marks.

Compared with unfilled PC/ABS, the addition of 15% mineral filler reduces notched Izod impact from approximately 35 kJ/m² to 10–20 kJ/m². This is a property cliff-edge for snap-fit and drop-impact applications. If low-temperature impact is a design criterion, validation under ISO 6603-2 at -20 °C is required. The lower elongation at break also means that living hinges and integral springs are outside the intended use envelope unless the part is redesigned with a lower strain limit.

The filler also reduces mold shrinkage and post-mold warpage. In flat panel applications, mineral-filled PC/ABS can hold a flatness tolerance of ±0.3 mm over a 300 mm length more readily than unfilled PC/ABS, provided gate position and packing pressure are optimized. This is the principal reason the NH-series is used instead of a general-purpose PC/ABS in appliance control-panel frames and air-conditioner drain-pan supports.

Qingdao Haier New Material PC/ABS NH-9016M15 is intended for injection-molded structural and enclosure components in home appliances, electronic control housings, and interior automotive brackets. The mineral fill provides a balance of stiffness and flatness control in parts with wall thickness between 1.2 mm and 3.0 mm. Parts below 1.0 mm wall thickness are not recommended without flow simulation and a dedicated hot-runner gate analysis because the mineral phase increases pressure drop. If flame-retardant performance is required, the part drawing should specify UL 94 V-0 at the minimum wall thickness; published data for this specific configuration is limited, and the supplier’s yellow card must be referenced before production.

Compared with a 20% glass-fiber-filled PC/ABS, the mineral-filled grade has lower tensile strength, lower notched impact, and lower anisotropic warpage. Glass-fiber-filled compounds often show flow-direction shrinkage near 0.1% and cross-flow shrinkage near 0.5%; mineral-filled grades reduce that anisotropy to approximately 0.1 percentage points or less when gate location is optimized. This difference matters in flat, close-tolerance parts that are assembled with gaskets or heat-sealed films.

Compared with a general-purpose unfilled PC/ABS, NH-9016M15 is less suitable for parts requiring high ductility or high-energy impact absorption. The mineral filler acts as a stress concentrator; sharp corners should be radiused to at least 0.5 mm and wall-thickness transitions should not exceed 25% to prevent crack initiation at the filler-matrix interface. When North American procurement specifications require ASTM values, the ISO-based data should not be used as direct substitution. ASTM D638-14 Type I tensile bars, ASTM D256-10 Izod bars, and ASTM D648-18 HDT specimens differ in geometry and notch radius from ISO 527-2/1A, ISO 180/A, and ISO 75-2/A. A universal conversion factor is not valid for mineral-filled PC/ABS.

For secondary finishing, the mineral filler creates a microscopically rough surface after chemical etching. Topcoat adhesion under cross-cut ISO 2409 may fall from class 0 to class 2 if the surface is not primed. UV-cured coatings show lower adhesion than on unfilled PC/ABS because the filler reduces the available polar polycarbonate surface area. If the part is to be laser-marked, marking power should be reduced by 10–20% relative to unfilled PC/ABS to avoid charring. Ultrasonic welding is feasible, but the mineral filler lowers melt-weld strength. Joint design should use a shear joint rather than an energy-director butt joint; vibration welding can be used with amplitude below 1.0 mm and pressure below 2 bar.

Drying, screw recovery, and mold-temperature boundaries

Pre-drying is mandatory. The material should be dried at 80–100 °C for 3–4 h in a desiccant dryer with a dew point of -30 °C or lower. Residual moisture must be below 0.02%. If the resin is exposed to plant air above 60% relative humidity, moisture regain can occur within 30 min; a hopper dryer with dry-air feed is required under those conditions. Moisture above 0.05% hydrolyzes the polycarbonate phase and produces silver streaking, splay, and a drop in notched impact strength.

Barrel temperature settings for the NH-series are typically 240–270 °C from rear to nozzle. The melt temperature should not exceed 280 °C, because the ABS phase degrades and generates black specks and odor. Mold temperature should be held between 60 °C and 90 °C. Lower mold temperatures reduce cycle time but increase molded-in stress and reduce gloss uniformity on textured surfaces. Back pressure should be set between 3 bar and 7 bar hydraulic to maintain filler dispersion without over-shearing the polycarbonate phase. Screw speed should be limited to 50–120 rpm for a 35 mm screw; speeds above 200 rpm add shear heat and can produce black specks at the screw tip.

Thermogravimetric analysis of 15% mineral-filled PC/ABS typically shows 1% weight loss near 350 °C in nitrogen and 320 °C in air under ISO 11358-1. Isothermal exposure at 260 °C for 30 min yields weight loss below 0.5%. This defines the upper residence-time boundary. At 280 °C, the ABS phase begins to generate butadiene-derived volatiles, and the polycarbonate phase undergoes chain scission if moisture is present. Residence time in the barrel should not exceed 8–10 min at full melt temperature. If a cycle interruption occurs, barrel settings should be reduced to 230 °C or the barrel should be purged immediately.

Purge with a PC-based purge compound or acrylic-based purge after shutdown. Avoid purging with rigid PVC or acetal, because thermal degradation residues are incompatible with the polycarbonate phase. Hot-runner systems should avoid dead spots that expose the melt to temperatures above 300 °C for more than 5 min. Mold-temperature controllers should use turbulent flow with a Reynolds number above 10,000 to maintain surface temperature variation within ±5 °C; larger variation creates visible gloss variation on textured surfaces.

For production release, the following compliance documents are required for the NH-series. Absence of a document should be treated as a non-conformance, not as a technical equivalence.

The mineral filler in Qingdao Haier New Material PC/ABS NH-9016M15 reduces solvent resistance relative to unfilled PC/ABS in aggressive environments. Molded parts should not be exposed to ketone solvents, aromatic hydrocarbons, strong alkalis, or amine-based mold release agents. Amine-based additives attack the polycarbonate phase and can cause environmental stress cracking at low molded-in stress levels. If a release agent is required, use a neutral or acidic non-amine grade evaluated under ISO 22088-2 constant-strain conditions.

Regrind use is operationally feasible at 20% by weight with virgin material, but each 10% increase in regrind raises the notched impact reduction by approximately 5–10% depending on drying history and screw shear. Production-scale experience indicates that regrind above 30% can cause Charpy notched impact to fall below 8 kJ/m² and should not be used in load-bearing brackets without a full mechanical re-qualification.

The product is not inherently conductive. Surface resistivity may exceed 10¹³ Ω under IEC 62631-3-2:2023 unless an antistatic additive is declared on the lot certificate. Therefore, electronic enclosure designs requiring electrostatic discharge protection below 10⁹ Ω are outside the unfilled and mineral-filled grade envelope unless the part is coated or a conductive grade is specified. Weld-line strength in mineral-filled PC/ABS can be 30–50% lower than the bulk tensile strength; gate placement and sequential valve gating should position weld lines away from load-bearing bosses and snap-fit features.