Within the polycarbonate/acrylonitrile-butadiene-styrene alloy category, Dongguan Haohan Plastic’s model designation JH1400 is supplied as a pelletised thermoplastic for injection moulding and limited extrusion. The compound is identified by its base resin combination rather than by an encoded melt-flow or flame-retardant suffix, which places it among general-purpose PC/ABS grades rather than V-0 flame-retarded or mineral-filled variants. Published data for JH1400 in the form of a public UL Yellow Card or an ISO-conformant manufacturer datasheet is limited; therefore any specification set for incoming material should be fixed through the supplier’s lot certificate and first-article inspection. Typical specification fields include polymer matrix, pellet size, moisture content, melt volume-flow rate, density, tensile yield stress, Charpy notched impact strength, Vicat softening temperature, and UL 94 flammability class. These parameters are measured according to ISO 1183-1:2019, ISO 1133-1:2022, ISO 527-2:2012, ISO 179-1:2020, ISO 306:2022, ISO 75-2:2020, and ASTM D792-20. The compounder’s standard packaging for PC/ABS is commonly a 25 kg multi-wall paper or aluminium-lined bag; this should be confirmed on order and kept sealed below 60 % relative humidity before drying.

How should the moulding engineer establish a drying and processing window for JH1400?

Moisture control is the first process critical. Polycarbonate in PC/ABS undergoes hydrolysis at melt temperatures above 260 °C if pellet moisture exceeds 0.02 % by weight. A closed-loop desiccant dryer with an air dew point of −30 °C or lower is required; drying at 80 °C to 100 °C for 3 h to 4 h is the usual starting window, with the upper time reserved for material stored at relative humidity above 60 %. The residual moisture should be checked by ISO 15512:2019 or a calibrated moisture analyser before the lot enters the hopper. At 0.02 % moisture, surface splay and silver-streak defects are minimised in parts with wall thicknesses between 1.5 mm and 3.2 mm.

Melt preparation occurs in a single-flight, three-zone screw with L/D ratio from 20:1 to 24:1 and compression ratio from 2.0:1 to 2.5:1. A general-purpose nylon or polycarbonate screw with a non-return valve of free-flow design is acceptable. Barrel temperature settings from rear to nozzle commonly fall within 220 °C to 270 °C: rear 220 °C to 240 °C, middle 240 °C to 260 °C, front 250 °C to 270 °C, nozzle 260 °C to 270 °C. The melt temperature measured by a needle pyrometer should remain at 240 °C to 270 °C; residence times above 5 min at melt temperatures above 270 °C promote polycarbonate chain scission and carbon dioxide generation. Back pressure should be set from 0.3 MPa to 0.7 MPa to maintain a stable screw cushion of 3 mm to 6 mm.

Mould temperature is a determinant of surface replication and shrinkage. For untextured technical housings, a mould temperature of 60 °C to 90 °C is used; the lower half of that range improves cycle time, while the upper half reduces internal stress and improves knitline strength. Parts with deep ribs or bosses should be moulded at the upper end of the range. Hot-runner systems are acceptable if the manifold temperature does not exceed 270 °C and the gate is sized for PC/ABS shear rates below 50,000 s⁻¹. Cold-runner gates should use round or trapezoidal cross-sections; pinpoint gates below 1.0 mm diameter may freeze prematurely and cause jetting.

Regrind of sprues and runners may be added up to 20 wt% if the regrind is dried and free of contamination; higher levels reduce low-temperature impact because of accumulated thermal history. The regrind fraction should be screened to remove fines below 2 mm and mixed with virgin pellets in a consistent ratio. Colour concentrates for PC/ABS should use a polycarbonate carrier rather than an ABS carrier to avoid delamination at the interface. External mould release agents containing silicone oil impair painting and should be avoided unless post-mould plasma or chemical surface treatment is planned under the painting supplier’s adhesion protocol.

Mechanical property expectations for unfilled PC/ABS are commonly bracketed by the ranges shown in the table below. The table is not a certified JH1400 data sheet; it is an engineering reference bounded by general-purpose PC/ABS behaviour and is included to define the test methodology a buyer should request from Dongguan Haohan Plastic.

The ranges in the table are reference intervals for unfilled general-purpose PC/ABS and must not be interpreted as lot-specific JH1400 values. Because the producer does not publicise lot-specific MVR data, the melt volume-flow rate of JH1400 should be verified against the tool’s flow-length-to-wall-thickness ratio before moulding. If the mould has ribs longer than 100 mm or wall stock below 1.2 mm, a higher-flow PC/ABS grade or increased melt temperature may be required, but low-temperature impact retention should be re-checked. The Charpy results are especially sensitive to moisture conditioning; specimens should be dry-as-moulded or conditioned per ISO 291:2008 class 23/50, and both states should be reported in the incoming inspection. The UL 94 rating is frequently assumed in application literature; for JH1400, an HB classification at 1.5 mm should be accepted only after a third-party UL Yellow Card or an equivalent ignition test report is supplied for the exact resin formulation and colour.

Differences from other materials become most apparent at the moulding machine and in chemical exposure

Compared with high-flow PC/ABS grades, JH1400 is not specified by the producer as a high-flow formulation. High-flow PC/ABS grades typically show melt volume-flow rates above 25 cm³/10 min at 260 °C/5 kg and are selected for thin-wall parts, but their notched impact strength at −30 °C can be 20 % to 40 % lower than the unfilled general-purpose equivalent. Therefore a buyer considering JH1400 for a thin-wall housing should first measure the actual MVR and compare it with the flow-length requirement, rather than assuming it will fill at the same pressure as a high-flow product. The lot-to-lot variation in MVR should be controlled to ±2 cm³/10 min if the mould operates at the limit of the press clamp force.

Against flame-retarded PC/ABS, the absence of a FR suffix on JH1400 indicates that it should not be applied where a UL 94 V-0 classification at 1.5 mm or glow-wire ignition at 650 °C is mandatory. Phosphate-ester FR PC/ABS grades often show lower melt thermal stability and require stricter residence-time control; they may release acidic species when overwet. Non-halogen FR variants can also differ in density, tensile modulus and paint adhesion. If a flame-retardant rating is required for an electrical enclosure, the specific grade should carry a UL Yellow Card with the exact colour and thickness, not a verbal claim.

PC/PBT alloys differ from PC/ABS in chemical resistance and semi-crystalline morphology. A PC/PBT grade typically resists hydrolysis and automotive lubricants better than PC/ABS, but its heat deflection temperature under 1.8 MPa is commonly 10 °C to 20 °C lower and its low-temperature impact is generally inferior. PC/PBT crystallises during moulding, so mould temperature has a stronger effect on shrinkage and post-mould dimensional stability. JH1400 as a PC/ABS blend is amorphous and should be chosen for low-temperature ductility, lower mould-temperature sensitivity, and surface appearance, not for prolonged contact with strong alkaline or hydrocarbon media.

PC/ASA grades replace the ABS fraction with acrylate-styrene-acrylonitrile to improve outdoor colour retention and UV resistance. PC/ASA is preferred for unpainted exterior trim and enclosures exposed to sunlight, while PC/ABS may yellow and lose surface gloss after extended UV exposure. JH1400 should be treated as an indoor material unless the manufacturer supplies lot-specific QUV or xenon-arc data according to ISO 4892-2:2013. Mineral-filled or glass-fibre-filled PC/ABS grades are differentiated by lower mould shrinkage, higher flexural modulus and reduced ductility. A 10 wt% talc-filled PC/ABS may reduce mould shrinkage from the unfilled range of 0.5 % to 0.7 % down to 0.3 % to 0.5 %, but notched Charpy impact can drop by 30 % or more. For flat panels with ribbing and low warpage requirements, a mineral-filled grade may be preferable; for snap-fits and impact-loaded clips, the unfilled JH1400 may carry more energy before failure.

Operational boundaries for PC/ABS include continuous contact with aromatic hydrocarbons, ketones, esters, chlorinated solvents, concentrated alkalis, and certain plasticiser systems. These environments produce environmental stress cracking more rapidly when the part carries injection-moulded-in stress. Moulded-in stress should be reduced by uniform wall thickness, generous radii at bosses, and adequate packing; stress levels can be screened by a solvent-immersion test using a mixture of 70 % n-propyl acetate and 30 % methanol under controlled time, but this is a comparative quality tool rather than a design standard. If JH1400 is specified for use near PVC cable insulation, the plasticiser migration risk should be assessed because phthalate plasticisers can promote stress cracking in PC/ABS. Incompatibility with strong amine-based additives should be assessed for cleaning agents and colourants because residual amines can degrade polycarbonate.

Application screening for JH1400 centres on indoor structural housings where the part surface temperature remains below the heat deflection temperature under load. In consumer electronics enclosures, the material may be used for mid-frame covers, stand bases, and panel brackets; moulded parts should be evaluated by drop tests referenced to IEC 60068-2-31:2008 or customer-specific impact protocols. For automotive interior brackets, instrument panel subcomponents and HVAC flap supports are candidate geometries if the part is not exposed to direct UV, continuous temperatures above 90 °C, or aggressive brake fluid. In appliance front panels and washing machine kick plates, resistance to detergents should be verified by ISO 175:2010 immersion tests because PC/ABS can stress-crack in concentrated alkaline cleaners. In power distribution components, use is restricted to non-current-carrying insulating housings unless the sample passes IEC 60112:2009 comparative tracking index and IEC 60695-2-11:2014 glow-wire tests; the unfilled non-FR nature of JH1400 may limit its suitability above 650 °C glow-wire criteria.

For parts requiring low-temperature impact after conditioning at −30 °C, gate location and weld-line placement are as significant as resin selection. The injection gate should be positioned away from impact-loaded bosses; weld lines in filled grades are more brittle than in unfilled PC/ABS. If a part must pass a drop test, prototype lots should be moulded with both cold and hot runner systems to detect internal stress differences. If JH1400 is supplied as an unfilled grade, its composition makes it more ductile than mineral-filled variants but more prone to warpage in flat panels; therefore shrinkage across a 300 mm × 150 mm panel should be measured using ISO 294-4:2018. For final first-article approval, incoming resin should be tested for MVR, moisture, density, tensile yield stress, and notched Charpy impact using the same standards listed in the property table, with the results recorded against the supplier’s lot certificate.