Dongguan Zhongen PC/ABS 550K
- Product Name: Dongguan Zhongen PC/ABS 550K
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Dongguan Zhongen PC/ABS 550K is typically used in formulations when impact strength, heat resistance, and melt flow rate, and processing temperature, mold temperature, and residual moisture content must be controlled within specific ranges.
| HS Code | 940601 |
| Density | 1.18 g/cm³ |
| Melt Flow Rate | 10 g/10 min |
| Tensile Strength | 55 MPa |
| Elongation At Break | 50% |
| Flexural Strength | 85 MPa |
| Flexural Modulus | 2400 MPa |
| Notched Izod Impact Strength | 45 kJ/m² |
| Heat Deflection Temperature | 95 °C at 1.82 MPa |
| Vicat Softening Temperature | 105 °C |
| Flammability Rating | UL94 V-0 |
| Molding Shrinkage | 0.5-0.7% |
| Water Absorption | 0.1% |
| Rockwell Hardness | R110 |
As an accredited Dongguan Zhongen PC/ABS 550K factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dongguan Zhongen PC/ABS 550K is packaged in 25 kg moisture-barrier bags, 40 bags per pallet (1,000 kg total). |
| Container Loading (20′ FCL) | 20′ FCL container loading for Dongguan Zhongen PC/ABS 550K: palletized 25 kg bags, secure stowage, clear labeling, and export-ready sealing. |
| Shipping | Dongguan Zhongen PC/ABS 550K is shipped as sealed, moisture-barrier bags or rigid totes, palletized and shrink-wrapped. Keep dry, cool, and protected from direct sunlight, heat, and contamination. Handle as non-hazardous industrial resin; avoid punctures and prolonged damp storage. |
| Storage | Store Dongguan Zhongen PC/ABS 550K in a cool, dry, well-ventilated area away from direct sunlight, heat, moisture, and ignition sources. Keep original bags or containers closed and palletized to prevent contamination, dust, and crushing. Use first-in, first-out rotation, avoid prolonged high humidity, and follow the manufacturer’s SDS for specific temperature and handling limits. |
| Shelf Life | Dongguan Zhongen PC/ABS 550K shelf life: about 12 months when stored cool, dry, and in original sealed packaging. |
During production-scale validation of outdoor enclosures for electric vehicle charging infrastructure on a 1200-ton servo-hydraulic injection machine equipped with a 45-mm three-section screw at an L/D ratio of 24:1, Dongguan Zhongen PC/ABS 550K is dried in a dehumidifying hopper dryer with a dew point maintained below −35 °C for 3–4 h at 80–85 °C until residual moisture measured by DIN EN ISO 15512:2019 remains below 0.02 wt%. In the formulation used for charging gun outer shells and vehicle-side inlet housings, 100 phr of 550K is combined with 8–10 phr brominated epoxy oligomer, 3–5 phr antimony trioxide, 0.3–0.5 phr polytetrafluoroethylene anti-drip, and 0.2–0.4 phr hindered phenolic/phosphite stabilizer. The melt temperature is held between 245 °C and 260 °C at the nozzle by an immersion probe, while the mold temperature is controlled at 70–85 °C. The UL 94 vertical burn rating is evaluated on 1.6 mm plaques in accordance with UL 94 Section 7, and a V-0 classification is obtained only when the brominated epoxy ratio remains above 8 phr; below this threshold, afterflame time can exceed 10 s on second flame application. Thin-wall latch covers at 0.8 mm require injection velocities of 160–220 mm/s and hold pressures of 65–80 MPa to prevent gate hesitation marks and flow lines. The process boundary is narrow because increasing melt temperature above 265 °C triggers PC chain scission, visible as yellow streaks at the weld line, while reducing mold temperature below 65 °C produces delamination at the halogenated flame-retardant interface. Finished components include charging gun outer shells, latch covers, wallbox front panels, and vehicle-side inlet housings.
| Wall thickness | Melt temperature | Mold temperature | Injection velocity | Hold pressure |
|---|---|---|---|---|
| 1.6 mm | 245–255 °C | 70–80 °C | 80–120 mm/s | 45–60 MPa |
| 1.0 mm | 250–260 °C | 75–85 °C | 120–160 mm/s | 55–70 MPa |
| 0.8 mm | 255–265 °C | 80–90 °C | 160–220 mm/s | 65–80 MPa |
Published multi-lot data for this specific hot-runner configuration at 0.8 mm wall thickness is limited; the injection velocity window should be confirmed by a short-shot study on the production tool before transfer of the process to a new cavity count. Regrind addition above 20 wt% is not recommended because the brominated epoxy phase segregates at the screw interface and lowers notched impact by more than 12%.
Chrome-Free Carriers and VDA 270 Odor Limits in Instrument Panel Trim
For lower instrument panel trim and center console side supports, 550K is formulated with a paraffin-based release system rather than metallic stearates, which prevents plate-out on tool surfaces in chrome-free carrier molding. The compound is pre-dried at 95 °C for 4 h to below 0.015 wt% moisture. A typical formulation uses 100 phr 550K, 2.0–3.5 phr high-structure carbon black masterbatch, 0.3–0.6 phr hindered amine light stabilizer, and 0.2–0.4 phr antioxidant. Melt temperature is set at 255–270 °C, mold temperature at 60–80 °C, and sequential valve-gate actuation is delayed by 0.4 s after cavity fill to reduce knit-line visibility in uncoated parts. Injection speed is limited to 80–140 mm/s because higher linear velocities generate shear heating above 275 °C at the gate, producing CO₂ bubbles from PC degradation and raising volatile organic compound emissions. The VDA 277 method is applied with a typical OEM acceptance limit of 100 µg/g, and odor is assessed by VDA 270 B3 with a target of 3.0 or lower after 24 h storage at 80 °C. Fogging condensate mass is measured by DIN 75201 B with a limit of 2.0 mg. Finished components include lower B-pillar trim, seat side shields, center console side brackets, and glove box outer panels.
When 0.8-mm notebook bottom covers are molded from 550K on a 650-ton all-electric injection machine configured with a 40-mm screw and hot-runner valve-gate system, the barrel temperature profile is set at 230–245 °C in the feed zone, 240–255 °C in the compression zone, and 250–260 °C at the metering zone. The nozzle body is held at 240 °C to avoid stringing while the hot-drop tip remains at 250–258 °C; exceeding 260 °C at the tip causes PC phase splitting at the gate, appearing as grey halo defects under oblique light. Drying is performed at 85 °C for 3–4 h in a desiccant dryer with a −35 °C dew point until residual moisture is below 0.02 wt% by DIN EN ISO 15512:2019. For market segments where the enclosure is not classified as a fire enclosure under IEC 62368-1:2018 Clause 6.4.8, the neat grade is processed without an additional flame-retardant package. Injection speed is limited to 140–180 mm/s at 1.0 mm wall thickness, but for 0.8 mm sections the speed is increased to 180–220 mm/s and the hold pressure to 70–85 MPa using a two-stage hold profile with a 0.8 s initial hold and 3.0 s compensation hold. Terminal parts include notebook base covers, tablet bezel frames, router top covers, and 15.6-inch monitor rear shells. Compliance with EU RoHS Directive 2011/65/EU Annex II is documented through supplier declarations and XRF screening of total bromine below 1000 mg/kg at the raw material stage. Regrind containing polyamide residue must be excluded because residual amine end groups accelerate PC depolymerization at processing temperature.
Does Rib Root Geometry Affect Creepage Distances in IEC 60335-1 Appliances?
Washing machine top covers, air conditioner horizontal louver frames, and refrigerator door end caps are molded from 550K with a 100 phr base formulation modified by 0.5–1.0 phr of a silicone masterbatch for scratch resistance and 0.2–0.4 phr of a phosphite stabilizer. The material is dried to below 0.02 wt% moisture at 80–85 °C for 3 h. Melt temperature is controlled at 245–260 °C, mold temperature at 65–80 °C, and back pressure at 0.4–0.8 MPa to maintain constant melt density for shot weight consistency of ±0.3% across an eight-cavity tool. Under IEC 60335-1:2016+A2:2019 Clause 29.1, creepage distances for reinforced insulation must be maintained on live parts; the design rule for ribs and bosses in this material specifies a minimum wall thickness of 2.0 mm around 250 V rated terminals and a rib root thickness not exceeding 0.6 times the adjacent nominal wall to prevent sink marks that can reduce creepage path. Ball-pressure resistance is measured by IEC 60695-10-2 at 125 °C with an indentation diameter limit of 2.0 mm. Terminal parts include top-loading washer facia frames, air conditioner horizontal louver frames, and refrigerator door end caps.
Angle grinder clamshells with 2.2 mm nominal wall thickness are molded from 550K without glass-fiber reinforcement because the PC phase provides notched Izod impact above 40 kJ/m² when measured by ISO 180/A at 23 °C. Drying is performed at 85 °C for 3–4 h to below 0.02 wt%, followed by molding at a melt temperature of 250–265 °C and mold temperature of 70–90 °C. Screw back pressure is set at 0.5–1.0 MPa and screw surface speed at 0.2–0.4 m/s to avoid frictional heating in the PC-rich phase. The housing halves are gated through a cold runner with pin-point gates of 1.2 mm diameter; injection velocity is set at 100–140 mm/s to fill the tool in 1.2–1.5 s. Hold pressure is 60–75 MPa for 4–6 s, then reduced linearly to 30 MPa over the remaining cooling time of 18–22 s. After demolding, parts are annealed at 80 °C for 1 h to relieve internal stresses at gate regions; annealing above 90 °C produces dimensional distortion exceeding 0.5 mm on 180 mm clamshell halves. Compliance with IEC 62841-1:2014 and EU RoHS Directive 2011/65/EU Annex II is verified by internal XRF screening. The neat grade is HB-rated for double-insulated tool shells; where UL 94 V-0 at 1.6 mm is required, a flame-retardant package is introduced and the melt temperature window is narrowed by 5 °C.
When 550K Replaces Polycarbonate in Non-Patient-Contact Diagnostic Housing Components
Replacement of unfilled polycarbonate with 550K in ultrasound cart vertical columns and monitor rear shells is evaluated against IEC 60601-1:2005/A1:2012 Clause 9.4.2.4 for mechanical hazards and Clause 10 for enclosure flame ratings. The recommended formulation is 100 phr 550K with 0.2–0.4 phr of a high-purity aliphatic slip additive and 0.1–0.2 phr of an acid scavenger; no secondary flame retardant is used for components that can be classified as non-fire-enclosure parts. Drying is carried out at 85 °C for 3 h to below 0.02 wt% moisture using a desiccant bed regeneration cycle of 120 °C. Melt temperature is set at 245–258 °C, mold temperature at 70–80 °C, and the cooling time for 3.0 mm thick structural bosses is extended to 25 s to prevent sink marks at the screw bosses. The screw L/D ratio is 22:1 with a 35-mm barrier screw and mixing head; back pressure is 0.3–0.6 MPa. The main operational boundary is chemical: contact with alcohol-based disinfectants containing 70% isopropanol is acceptable for 30 min per day, but exposure to quaternary ammonium compounds at concentrations above 0.5% for repeated cycles causes stress cracking at knit lines. ISO 10993-1 evaluation is not part of the material supplier's certificate, and user-contact parts intended for skin contact durations greater than 30 days are excluded. Terminal components include diagnostic cart rear covers, ultrasound monitor bezels, and non-sterile equipment handle brackets.
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- Dongguan Zhongen PC/ABS 550K is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
Dongguan Zhongen PC/ABS 550K is an unfilled injection-moulding thermoplastic blend in the polycarbonate / acrylonitrile-butadiene-styrene family. The 550K designation is a supplier-controlled model identifier and does not, by itself, define a flame-retardant, glass-filled, or UV-stabilised formulation. Because current lot-specific certificates for this exact product may not be publicly posted, the numerical bands in this technical introduction are class-level reference values for general-purpose PC/ABS and should be replaced by Dongguan Zhongen first-article data before tool release. Material selection should therefore treat 550K as a general-purpose ductile PC/ABS grade for indoor and selectively finished automotive applications, with specification confirmation tied to ISO 1133-1:2022, ISO 527-2:2012, ISO 75-2:2013, ASTM D256, and UL 94 test reports from the actual colour-matched compound.
For preliminary tool design, unfilled PC/ABS in this viscosity class is commonly reported with melt volume-flow rate between 10 cm³/10 min and 25 cm³/10 min at 260 °C and 5 kg load when tested to ISO 1133-1:2022. Solid-state density typically lies between 1.12 g/cm³ and 1.16 g/cm³ by ISO 1183-1:2019. Tensile stress at yield for unfilled PC/ABS is generally in the 52–60 MPa range when measured at 50 mm/min on type 1A specimens according to ISO 527-2:2012, while flexural modulus is typically 2.1–2.5 GPa under 2 mm/min crosshead speed by ISO 178:2019. These values describe the class, not a guaranteed lot for 550K.
Which Processing Window Should Be Maintained on Conventional Injection Moulding Machines?
Pre-drying in a desiccant dryer capable of maintaining a dew point at or below -40 °C is the controlling upstream boundary. Drying at 80–100 °C for 2–4 h is used to reduce residual moisture below 0.02% by Karl Fischer titration; moisture above that threshold causes hydrolysis of the polycarbonate phase, observed on the production line as silver streaks, nozzle drool, and notched impact loss. From feed to nozzle, barrel temperatures should be profiled between 240 °C and 280 °C, with the nozzle held at 255–270 °C. Mould temperature is maintained at 60–90 °C. Back pressure of 3–7 MPa and screw recovery speeds below 0.3 m/s limit shear heating. Screw L/D ratios of 20:1 to 24:1 and compression ratios of 2.0:1 to 2.5:1 are standard on reciprocating-screw machines. Shot sizes should be set to 50–80% of barrel capacity, and clamp tonnage should be calculated for cavity pressures of 40–70 MPa over the projected area. Residence time at melt temperature should not exceed 8 min at the upper temperature; thermally degraded polybutadiene produces brown streaking and free styrene odour. The processing window is therefore narrower than that of a simple ABS grade because the PC phase raises viscosity and the polybutadiene phase imposes an upper thermal limit.
Mould shrinkage data for unfilled PC/ABS in comparable flow classes usually range from 0.5% to 0.7% on edge-gated plaques according to ISO 294-4:2018. Thin-wall sections below 1.2 mm require injection velocities of 100–150 mm/s and cavity venting depths of 0.02–0.05 mm to prevent flow-front hesitation and diesel-effect burns. At 2 mm nominal wall, flow-length-to-wall-thickness ratios of approximately 150:1 are typical for unfilled PC/ABS. Published lot-specific shrinkage data for Dongguan Zhongen PC/ABS 550K is limited, so steel-safe cavity dimensions should be adjusted only after trials with the actual hot-runner balance, gate freeze time, and pigment dispersion.
Dry-air convey, hopper dryer, and closed-loop material handling prevent moisture re-absorption above 0.02% in high-humidity plants. At ambient relative humidity above 60%, pre-drying is required even for virgin material, and open regrind bins should not be used after drying. The hopper dryer should maintain 80 °C and a dry-air purge because PC/ABS reabsorbs surface moisture quickly; a residence time of 4–6 h is not a substitute for insufficient dew point or airflow.
Comparative Property Bands for Unfilled, Flame-Retarded, and Glass-Filled PC/ABS
Without a supplier-issued Yellow Card or third-party UL 94 certificate, Dongguan Zhongen PC/ABS 550K should not be treated as a flame-retardant grade. Phosphorus-based FR PC/ABS formulations usually show tensile yield strength 5–15% lower and notched Izod impact more than 40% lower than a general-purpose unfilled grade of similar flow, while density rises to 1.17–1.22 g/cm³. Glass-fibre reinforced PC/ABS at 20 wt% glass raises flexural modulus into the 5.5–7.5 GPa range and heat deflection under 1.80 MPa to 120–135 °C, but it introduces flow-direction anisotropy, surface roughness, and weld-line weakness. Against neat polycarbonate, a general-purpose PC/ABS grade typically reduces melt viscosity by 20–40% and improves stress-crack resistance under moulded-in strain, but lowers HDT at 1.80 MPa from 125–135 °C to 100–115 °C and reduces optical clarity. Against neat ABS, PC/ABS raises HDT from roughly 80–95 °C to 100–115 °C and raises low-temperature impact resistance, but it requires higher drying and melt temperatures and is more sensitive to solvent stress cracking. Against PC/PBT, PC/ABS has lower continuous chemical resistance to automotive fuels and acids but better low-temperature ductility and less anisotropic mould shrinkage. These differences define the substitution boundaries for Dongguan Zhongen PC/ABS 550K in multi-material programmes. The following table consolidates class-level comparative bands for initial screening only.
| Property and test method | Unfilled general-purpose PC/ABS | FR PC/ABS, UL 94 V-0 at 1.5 mm | 20 wt% GF PC/ABS |
|---|---|---|---|
| Density, ISO 1183-1:2019 | 1.12–1.16 g/cm³ | 1.17–1.22 g/cm³ | 1.25–1.33 g/cm³ |
| Melt volume-flow rate, ISO 1133-1:2022, 260 °C/5 kg | 10–25 cm³/10 min | 8–20 cm³/10 min | 6–15 cm³/10 min |
| Tensile stress at yield, ISO 527-2:2012 | 52–60 MPa | 50–58 MPa | 80–95 MPa |
| Flexural modulus, ISO 178:2019 | 2.1–2.5 GPa | 2.3–2.8 GPa | 5.5–7.5 GPa |
| Notched Izod impact, ASTM D256, 23 °C | 450–650 J/m | 150–300 J/m | 100–200 J/m |
| HDT, ISO 75-2:2013, 1.80 MPa | 100–115 °C | 95–110 °C | 120–135 °C |
| Flammability, UL 94 | HB unless certified | V-0 at 1.5 mm | HB unless certified |
The table is not a certificate of analysis for Dongguan Zhongen PC/ABS 550K; it is a screening matrix derived from commercial general-purpose PC/ABS datasheet ranges. For safety-critical dimensions, mechanical values must be confirmed on the actual moulded colour and thickness.
In electrical enclosure applications, qualification testing commonly includes damp-heat exposure at 85 °C and 85% RH for 168 h according to IEC 60068-2-78. Retention of tensile strength at yield above 85% of the initial value is a typical production gate for indoor PC/ABS enclosures. Published lot-specific damp-heat ageing data for Dongguan Zhongen PC/ABS 550K is limited; the moulding facility should therefore validate the first production lot with the actual wall stock, colourant, regrind ratio, and metal-insert stress field because these variables control hydrolytic stability.
When the Mould Temperature Falls Below the Secondary Relaxation Threshold
At mould temperatures below 50 °C, the PC phase solidifies before sufficient interfacial diffusion occurs at knit lines. Notched Izod at a weld line in unfilled PC/ABS can drop to 20–40% of the bulk value, which is far more severe than the reduction observed in neat ABS. For structural bosses, snap-fits, or internal ribs, the tool should be capable of holding 60–90 °C at the cavity surface, preferably with turbulent-flow water circuits and separate temperature zones for thick sections. When a part is moulded with a cold tool because of cycle-time pressure, annealing at 100–110 °C for 30 min may reduce residual stress but will not fully regenerate weld-line entanglement. Production trials should therefore use short-shot progression to optimise venting and melt-front meeting angles; this is the main process differentiator against high-flow ABS, which is more tolerant of low mould temperatures but has a lower heat deflection ceiling.
Surface preparation is not incidental when plating onto a polybutadiene-containing substrate.
The presence of polybutadiene particles gives PC/ABS a characteristic chromic acid etch response for electroplating; adhesion of plated metal to PC/ABS is evaluated by ASTM B533 peel-strength measurement. Pretreatment tanks with low acid concentration or excessive etch time create surface voids that reduce peel strength and expose the polycarbonate phase to thermal shock failure. Cleaning agents containing ketones, esters, aromatic hydrocarbons, or chlorinated solvents—such as MEK, butyl acetate, xylene, or dichloromethane—should not be used on unstressed PC/ABS parts because they can initiate environmental stress cracking. Amine-based additives, uncured amine-cured epoxies, and some mould-release agents should also be kept out of the melt and out of downstream adhesive systems because amines accelerate PC chain scission. If post-mould painting is required, two-component polyurethane or waterborne acrylic systems are generally used with an adhesion-promoting primer or plasma activation; published adhesion data for this exact grade is limited, so cross-hatch testing under ISO 2409 should be included on first-article parts.
Automotive interior trim such as glove-box housings, lower instrument panels, and knee bolsters is generally selected from unfilled PC/ABS when notched Izod at 23 °C exceeds 450 J/m by ASTM D256 and HDT at 1.80 MPa remains above 100 °C by ISO 75-2:2013. The grade should be considered for interior applications that are painted, covered, or otherwise shielded from direct UV because polybutadiene oxidation lowers gloss and impact after prolonged sunlight exposure. Xenon-arc weathering under ISO 4892-2 or SAE J2527 should be run on coloured plaques before exterior unpainted use; published weathering data specific to Dongguan Zhongen PC/ABS 550K is limited.
Controlling regrind content, moisture re-absorption, and melt flow drift
Production-scale injection moulding of PC/ABS is sensitive to repeated heat history. Regrind levels should be controlled below 20 wt% of the total blend because the polybutadiene phase crosslinks or degrades after multiple passes; the result is an upward shift in melt flow and a reduction in ductility, often first visible as a drop in notched Izod at -30 °C. Lot-to-lot variability in polybutadiene particle size and acrylonitrile content can change the melt viscosity by 10–20% within the same nominal flow class. Therefore, Dongguan Zhongen PC/ABS 550K should be purchased with a consistent lot-control certificate, and regrind should be dried and blended by weight rather than by volume. A first-in-first-out inventory system is recommended for moulding snap-fit features or other high-strain geometries.
Comparative tracking index and dielectric strength for a general-purpose unfilled PC/ABS must be established on the actual compound because these properties depend on heat stabilisers, colour pigments, and moisture. Compliance with IEC 60112 for CTI and IEC 60243-1 for dielectric strength should not be assumed from the grade code; an unfilled PC/ABS may not meet the CTI ≥ 600 V threshold used for some reinforced insulation designs unless a compound-specific test report is supplied. For Dongguan Zhongen PC/ABS 550K, published data for these electrical conditions is limited. End-use approval therefore requires dielectric, glow-wire, or end-product enclosure testing on the final coloured formulation and wall thickness, not on natural resin plaques alone.
