Qingdao Haier New Material supplies ABS TR-1067 as an unfilled acrylonitrile-butadiene-styrene resin within its appliance-focused styrenics portfolio. The alphanumeric designation TR-1067 does not correspond to a publicly standardized ISO or ASTM classification; the supplier certificate of analysis and technical datasheet therefore control lot-specific values for melt flow, impact energy, heat deflection temperature, filler content, and stabilizer package. The material is a two-phase system in which grafted polybutadiene rubber particles are dispersed in a continuous styrene-acrylonitrile copolymer phase. This morphology governs the practical compromise between rigidity and notched impact resistance. If ash content is below 1.0 % according to ISO 3451-1, the grade is classified as unfilled; higher ash values indicate a filled or formulated variant.

The grafted polybutadiene rubber phase contributes impact energy absorption through crazing and shear yielding. The acrylonitrile content in the continuous phase improves resistance to nonpolar service fluids and increases mechanical strength, while the styrene component contributes processability and stiffness. The exact phase ratio for ABS TR-1067 is not published, but the intended behaviour in appliance end-uses is normally verified by notched impact, tensile stress at yield, flexural modulus, and melt volume-flow rate rather than by compositional disclosure alone.

What Material Attributes Separate ABS TR-1067 from HIPS and General-Purpose ABS?

Comparative reference data for unfilled appliance-grade ABS and high-impact polystyrene appear in Table 1. These values are not lot-specific for TR-1067 but define the typical published envelope within which unfilled ABS grades are expected to fall. Lot-specific property differences should be read against the supplier certificate of analysis, not against the reference band alone.

Relative to HIPS, ABS grades of this class usually show higher resistance to environmental stress cracking when exposed to edible oils, alkaline cleaners, and detergent films, evaluated by ISO 22088-1 or ASTM D543. The improvement is derived from the acrylonitrile content in the styrene-acrylonitrile matrix. However, TR-1067-specific values for ester, ketone, and aromatic hydrocarbon contact require supplier data. The grade is not considered UV-stabilized unless the supplier certifies a stabilizer package and describes the accelerated weathering method, such as ISO 4892-2 with a xenon arc source. Unless the supplier certifies a flame-retardant formulation, no UL 94 rating should be assumed for this grade.

Processing Windows and Drying Constraints

Moisture control is the primary processing constraint for ABS TR-1067. Residual moisture above 0.1 % by weight produces splay, silver streaks, and viscosity loss from hydrolysis at melt temperature. Drying is carried out in a desiccant dryer with a dew point not higher than -35 °C and airflow of 0.15–0.20 m³/kg·h at 80 °C to 90 °C for 3 h to 4 h. At production-hall relative humidity above 60 %, the material should be handled in closed hoppers with dry-air purge; open hoppers may allow sufficient moisture regain to require redrying.

During injection moulding of thin-wall appliance parts, a processing conflict arises between cavity filling and degradation of the polybutadiene rubber phase. Barrel settings from feed to nozzle are commonly 210 °C, 220 °C, 230 °C, and 230 °C, with melt temperature measured between 220 °C and 250 °C. Operation above 260 °C accelerates thermal oxidation of the rubber phase, producing brown streaks and decreasing notched impact energy. The usable melt-temperature window may be as narrow as ±5 °C when gloss uniformity and low-temperature impact retention are both specified. Injection moulding machines should be equipped with closed-loop barrel temperature control and nozzle thermocouples accurate to ±1 °C.

The screw is selected with a compression ratio of 2.0:1 to 2.5:1 and an L/D ratio of 20:1 to 24:1. High-shear mixing elements may generate local melt temperatures above the barrel setpoint and are generally avoided for this butadiene-containing material. Residence time at melt temperature does not exceed 5 min. If an interruption exceeds 15 min, the barrel is purged with general-purpose ABS or HIPS regrind. Regrind levels above 20 % require re-certification of notched impact and melt volume-flow rate on each lot because the polybutadiene phase undergoes progressive thermomechanical damage.

Observed failure modes on production-scale equipment include splay at vents when residual moisture is uncontrolled, brown streaking after residence-time excursions, and surface delamination if the melt is contaminated with polycarbonate or flame-retardant regrind. Inconsistent notched impact across a cavity often indicates rubber-phase degradation in hot-runner dead spots. Hot-runner systems should be designed with smooth flow paths and no stagnation zones. Colour shift from white to cream is an early indicator of accumulated heat history.

Storage in original moisture-proof packaging at 5 °C to 35 °C and relative humidity below 60 % is recommended. The resin should not be mixed with polycarbonate, polyacetal, or PVC regrind; small quantities of polycarbonate can cause delamination and gas generation at ABS processing temperatures. Contact with aromatic hydrocarbons, ketones, esters, and chlorinated solvents causes swelling or stress cracking. Service-fluid compatibility is tested according to ISO 22088-1 or ASTM D543 using the actual stress level and exposure time.

When Lot-Specific Certification Supersedes Nominal Datasheet Values

Because TR-1067 is not registered in a public CAMPUS or equivalent polymer data system, the statements above are subordinate to the supplier technical datasheet and lot-specific certificate of analysis. Conformity to RoHS Directive 2011/65/EU, Annex II restricted substances, and REACH Regulation (EC) No 1907/2006 must be confirmed by lot-level declaration or independent test report. For food-contact applications, migration testing is required under EU Regulation (EU) No 10/2011 or 21 CFR 177.1020. No general statement of compliance is sufficient without defined simulant, contact temperature, and contact duration. Surface-contact compliance statements should also identify the specific migration limit and test method.

Injection Moulding Set-Up on Horizontal Clamping Units

Typical set-up parameters for unfilled ABS processing on horizontal injection moulding machines are summarised in Table 2. Values are reference ranges, not grade-specific warranties. The shot mass should occupy 30 % to 70 % of maximum plasticizing capacity. Clamp force required is estimated from projected cavity area at 3.0–5.0 kN/cm². For refrigerator liner and housing tools, mould temperature is held at 40 °C to 80 °C, with higher temperatures used where surface gloss and knit-line strength are specified.

Quality evaluation for incoming lots includes notched Izod impact at 23 °C and -20 °C according to ISO 180/1A, tensile stress at yield at 1 mm/min according to ISO 527-2, and Vicat softening temperature using ISO 306/B50. Colour drift is measured with a spectrophotometer under D65/10° viewing conditions. A lot-specific ΔE* limit for white appliance grades is often 1.5 units, but the exact visual tolerance for ABS TR-1067 is set by the supplier or end-user plaque standard.

Tool design for ABS TR-1067 requires sufficient venting at the end of fill, especially in refrigerator inner door liners with long flow lengths. Vent depth is typically 0.02 mm to 0.05 mm; deeper vents allow flash under high injection speeds. Gates are positioned away from visible surfaces and into thick sections to avoid jetting and flow marks. Draft angles of 0.5° to 1.0° on textured surfaces and 0.25° on polished cores are used to permit ejection without distortion.

For sheet extrusion or thermoforming, a separate grade-specific thermal stability study is required. Sheet extrusion barrel profiles are typically flat in the 210 °C to 240 °C range, with a polished roll stack at 60 °C to 90 °C. Published data for this specific configuration with ABS TR-1067 is limited, so thermoforming depth-of-draw and wall-thickness distribution must be confirmed by pilot trials on production tooling. Paint adhesion and metallization performance require surface energy above 38 mN/m after cleaning or corona treatment; adhesion testing should follow ISO 2409 for cross-cut adhesion after drying.