| HS Code | 582316 |
| Product Name | AUROmid PA12 TR55 black 9005 |
| Material Type | PA12 (Polyamide 12) |
| Condition | Dry |
| Color | Black 9005 (RAL 9005) |
| Density | 1.06 g/cm³ |
| Tensile Modulus | 2600 MPa |
| Tensile Strength At Yield | 75 MPa |
| Elongation At Yield | 6% |
| Elongation At Break | 50% |
| Charpy Impact Strength 23c | No break |
| Charpy Notched Impact Strength 23c | 18 kJ/m² |
| Heat Deflection Temperature 1 8 Mpa | 130 °C |
| Heat Deflection Temperature 0 45 Mpa | 150 °C |
| Glass Transition Temperature | 160 °C |
| Water Absorption 24h | 0.2% |
As an accredited Aurora Kunststoffe AUROmid PA12 TR55 black 9005 PA12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Aurora Kunststoffe AUROmid PA12 TR55 black 9005 PA12, Dry is supplied in sealed moisture-proof packaging: 25 kg bags. |
| Container Loading (20′ FCL) | 20′ FCL: dry AUROmid PA12 black granules packed in bags on pallets, securely loaded and ventilated for safe transport. |
| Shipping | Ship as dry, granular polyamide (PA12) in sealed, moisture-proof bags or drums. Avoid exposure to humidity and extreme heat. Store in a cool, dry, ventilated area away from ignition sources. Not classified as dangerous goods under standard transport regulations, but use proper labeling and secure palletization. |
| Storage | Store in a cool, dry area away from direct sunlight and heat sources. Keep the original sealed container tightly closed to prevent moisture absorption, which can degrade PA12. Avoid exposure to humidity, dust, and contaminants. Ideal temperature range is 20–30°C. Use dry, clean equipment when handling to maintain material purity and process performance. |
| Shelf Life | Store in original sealed packaging in a cool, dry place. Typical shelf life is 2 years from date of manufacture. |
Before injection moulding automotive fuel vapour connectors from AUROmid PA12 TR55 black 9005, the dry granulate is pre-dried in a desiccant dryer at 80 °C until residual moisture falls below 0.10%. The supplied dry state is not an equilibrium condition; opened material reabsorbs surface moisture within 4 h when ambient relative humidity exceeds 60%, so closed feed lines or dry-air hoppers with a dew point below -30 °C are used on high-volume lines. A reciprocating screw with an L/D ratio of 20:1 to 24:1 and a compression ratio of 2.0:1 to 2.5:1 runs at a melt temperature of 240 °C to 260 °C, mould wall temperature 40 °C to 80 °C, and hold pressure 40 MPa to 60 MPa. Gate placement on the coupling collar rather than the barb root moves the weld line away from the sealing surface. Regrind is limited to 20 wt% for non-pressurised retaining clips; pressurised quick-connector bodies are produced from 100% virgin compound unless the OEM has validated a closed-loop regrind stream. Incoming granulate is checked for melt volume-flow rate under ISO 1133-1:2022 at 235 °C using a 2.16 kg load; drift above 25% from the virgin reference indicates moisture contamination or degraded regrind. Finished parts are tested under SAE J2044 for quick-connect coupling integrity, with fuel vapour permeation evaluated under SAE J1737 and dimensional stability after thermal ageing per DIN 73378-1. Terminal products are petrol tank quick connectors, EVAP canister fittings, and diesel fuel return couplings. The technical driver is zinc chloride resistance; laboratory immersion in 50% zinc chloride solution at 50 °C for 200 h does not produce the hairline stress cracks observed in PA6 and PA66 connectors under the same exposure. Moisture above 0.15% causes silver streaks and a lower burst pressure at weld lines, which is why in-mould cavity pressure monitoring rejects short shots and sink marks at the barb roots before shipping.
Monolayer air brake tubing is extruded on a single-screw extruder with an L/D ratio of 30:1 and a barrier screw, using melt temperatures of 230 °C to 250 °C. The melt passes through a vacuum calibration sleeve at -0.06 MPa to -0.08 MPa and a two-stage water bath at 20 °C and 60 °C; this cooling sequence controls the through-wall crystallinity gradient without quenching the surface. For 6.0 mm × 1.0 mm and 8.0 mm × 1.0 mm tube dimensions, outer diameter tolerance is held to ±0.05 mm because push-to-connect fittings seal on the outer surface. Clean edge trim can be reintroduced at up to 15 wt% for pneumatic control tubing with wall thickness above 1.5 mm, but highway truck air brake circuits are extruded from 100% virgin PA12 because the SAE J844 boiling-water zinc chloride test and -40 °C impact requirement are sensitive to even small amounts of degraded or moisture-contaminated regrind. The extruded tube is tested to SAE J844 and DIN 73378-1. Terminal products include spiral-coil air brake lines, trailer air suspension tubing, and pneumatic transmission shift lines. In fleet service the dominant failure mode is not tensile burst but fatigue cracking at the coupling barb after vibration and thermal cycling; fitting pull-off force is therefore measured after exposure at -40 °C and after 1,000 h hot-air ageing at 90 °C. A first water bath below 15 °C quenches the surface and reduces zinc chloride resistance, so the first bath is not set below 20 °C even when higher line speed is available.
For corrugated cable protection tube in rail vehicle side skirts, PA12 black 9005 is extruded at melt temperatures of 210 °C to 230 °C into vacuum forming blocks maintained at 40 °C to 60 °C. The corrugator speed is matched to screw output and melt strength; because the black 9005 pigment is already incorporated, no additional masterbatch is used, which reduces lot-to-lot viscosity drift. The finished conduit is tested for compression strength and impact behaviour according to IEC 61386-1:2008; the relevant compression class is selected from the installation condition, with heavy-duty above-ground rail applications commonly checked at 750 N and underground ducting at 1250 N according to the standard’s classification clauses. For rail vehicle side skirts and robotic cable tracks, low-temperature impact is verified at -25 °C; failure at this condition usually indicates excessive moisture during extrusion or degraded regrind. In-plant regrind from start-up scrap is limited to 20 wt% and only after verification that the Charpy impact strength at -30 °C per ISO 179-1/1eA remains above the minimum specified in the conduit system approval. The grade is not inherently flame-retardant; cable conduits for rolling stock interior may require an additional flame-retardant outer layer or acceptance under the vehicle manufacturer’s fire protection specification. Outdoor weathering is evaluated under ISO 4892-2 using a xenon arc source; the carbon black pigmentation in 9005 provides UV shielding, but surface chalking may appear after 1,000 h without impairing crush strength. Chemical compatibility with hydraulic oils and greases is confirmed by immersion testing per ISO 175. The article is assessed under RoHS Directive 2011/65/EU Annex II and the polymer monomer is covered by REACH registration obligations. Terminal products include corrugated rail cable conduits, machine-tool energy chain tubes, and underground cable protection ducting.
When a PA12 pressure sheath is annularly extruded over a steel carcass, the dry granulate is conveyed under nitrogen to prevent moisture regain above 0.05% before entering the barrier screw. In unbonded flexible risers, AUROmid PA12 TR55 black 9005 is processed into extruded pressure sheaths and injection-moulded end-fitting seals for sweet hydrocarbon service at temperatures up to 60 °C. The extrusion line uses an L/D ratio of 30:1, melt temperature 215 °C to 240 °C, and a vacuum calibration sleeve at -0.08 MPa; for a 200 mm internal diameter riser, sheath wall thickness is typically 5 mm to 8 mm. Post-extrusion conditioning in water at 60 °C for 24 h raises crystallinity and stabilises the inner diameter before end-fitting assembly. Injection-moulded seals are produced at melt temperatures of 230 °C to 250 °C and mould wall temperatures of 40 °C to 80 °C. Qualification under API Spec 17J requires retained elongation after ageing in crude oil at 70 °C for 1,000 h; the test method is given in the qualification annex of the specification. Published data for this specific black 9005 PA12 compound in sour gas configurations is limited; qualification under ISO 23936-1:2022 for thermoplastics in oil and gas production requires additional permeation and rapid gas decompression testing. Regrind reuse in pressure sheaths is normally prohibited because microdispersed degraded PA12 changes crystallisation kinetics and reduces resistance to blistering during decompression. Terminal products are pressure sheaths in flexible risers, flowline outer sheaths, and injection-moulded end-fitting seals for offshore production systems.
| Segment | Standard or specification | Critical condition | Material requirement in practice |
|---|---|---|---|
| Automotive fuel vapour connectors | SAE J2044, DIN 73378-1 | Zinc chloride immersion, pressure cycling | 100% virgin for pressurised bodies |
| Air brake tubing | SAE J844 | Boiling water + -40 °C impact | 15 wt% max regrind only in non-safety pneumatic lines |
| Cable conduit | IEC 61386-1:2008 | Compression class, low-temperature impact | 20 wt% max regrind after Charpy verification |
| Offshore pressure sheath | API Spec 17J, ISO 23936-1:2022 | Crude oil ageing, decompression | No regrind in pressure sheath |
Injection moulding of ski boot shells from impact-modified PA12 black 9005 requires a processing window that balances thick-section packing against rapid surface cooling. Melt temperature is held at 220 °C to 250 °C, mould wall temperature 20 °C to 40 °C, and the gate system uses sequential valve gates to move weld lines away from the toe and upper flex zones. Wall thickness transitions from 2 mm in the upper foot shell to 8 mm at the sole lugs demand a stepped hold-pressure profile; initial packing at 80 MPa for 1 s followed by 40 MPa for 8 s suppresses sink marks without overpacking the thin shell. Machine clamp force is selected at 0.6 kN/cm² to 0.8 kN/cm² of projected area to prevent flash at the sole parting line. Production regrind is limited to 10 wt% in non-load-bearing tongue clips and heel inserts; load-bearing shell parts use 100% virgin compound. Finished shells are tested according to ISO 5355:2019 for ski boot flex and release-zone compatibility, with material specimens conditioned at -20 °C in accordance with ISO 291:2008. Low-temperature impact is checked by instrumented impact testing under ISO 6603-2:2023 on plaques machined from the moulded shell. A failure at the instep hinge normally traces back to moisture content above 0.10% or melt residence time above 260 °C. Terminal products include ski boot shells, snowboard boot backcuffs, and inline skate shells. The material is not recommended for continuous service above 80 °C because post-crystallisation of the amorphous surface layer can shift flex modulus and create dimensional distortion in the binding interface.
PA12 wear strips and guide rails for bottling and packaging conveyors are injection moulded or extruded as flat stock and then machined to length. Processing uses a melt temperature of 230 °C to 250 °C for injection moulding and 210 °C to 230 °C for profile extrusion; extruded flat stock is stress-relieved at 120 °C for 2 h before machining to prevent dimensional shift. The dry granulate is pre-dried at 80 °C for 4 h to 8 h to a moisture content below 0.10%. Regrind from machining dust and clean start-up scrap may be used at up to 25 wt% for non-load-bearing guide rail segments if the material has not been contaminated with conveyor lubricant. Chemical resistance to cleaning agents is evaluated by immersion testing per ISO 175; PA12 is specified over PA6 in hydrogen peroxide-based disinfectant lines because lower moisture regain produces less dimensional change and fewer surface defects. The black 9005 colour allows visual detection of surface wear, but gloss retention after repeated cleaning is subordinated to dimensional stability. The material is not automatically suitable for direct food contact; if contact with food or potable water is required, the finished article must be covered by a positive listing under the relevant national or EU food-contact regulation for the specific compound formulation. As an equipment component, the finished article is supplied under the obligations of EU Machinery Regulation 2023/1230. Terminal products include star wheels, guide rails, and wear strips in beverage container transport, glass bottling lines, and packaging machinery. Published data for this specific PA12 TR55 black 9005 in all cleaning agent mixtures is limited; plant trials with the actual cleaning chemistry are necessary before replacing acetal or UHMWPE parts.
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Aurora Kunststoffe AUROmid PA12 TR55 black 9005 PA12, Dry is a melt-processable polyamide 12-based compound supplied in a black 9005 pigmentation and a dry-molding moisture state. The designation PA12 follows ISO 1043-1 and identifies a semicrystalline aliphatic polyamide; the TR55 suffix is a manufacturer-specific modifier code associated with a toughened PA12 system; black 9005 corresponds to RAL 9005 jet black; and the Dry state indicates controlled residual moisture rather than an unconditioned or damp granulate. The product is supplied as granules and is intended for injection molding and profile extrusion where the low density, lower equilibrium moisture uptake, and low-temperature ductility of PA12 provide a measurable difference from PA6 and PA66 equivalents. Published product-specific data for this exact configuration remain limited; the values and threshold statements in this text are therefore presented as generic PA12 reference data or as process-engineering guidance rather than certified lot data.
Under ISO 1874-1, designating a PA12 compound requires a data block covering viscosity number, tensile modulus, impact behavior, and additive content. The AUROmid PA12 TR55 black 9005 grade belongs to the thermoplastic polyamide family, not to a crosslinked or thermosetting system. The polymer backbone is a linear aliphatic chain with recurring amide groups separated by eleven methylene units, producing a lower amide density than PA6 or PA66. This structural feature is responsible for the material’s lower water absorption, lower density, and a melting peak that typically lies between 174 °C and 180 °C when measured by differential scanning calorimetry according to ISO 11357-3. The black 9005 pigment package is a carbon-black-based colorant system; carbon black can raise thermal conductivity slightly and can act as a stabilizer against ultraviolet embrittlement, but it also influences melt viscosity and moisture adsorption at the granule surface.
Because the Dry designation indicates controlled residual moisture, storage conditions remain the first processing boundary. PA12 absorbs measurable moisture but less than PA6 and PA66. Under ISO 62, PA12 reaches an equilibrium moisture content of approximately 0.6 % to 0.8 % at 23 °C and 50 % relative humidity and approximately 1.5 % to 2.0 % at saturation, depending on the grade and crystallinity. The presence of impact modifier and carbon black can shift the actual equilibrium moisture content by changing the free-volume distribution and the surface-to-volume ratio of the granule; therefore lot-specific data should be obtained from the certificate of analysis.
Injection-molding and extrusion processors treat moisture content as a process-control variable because residual water reacts at melt temperatures through hydrolytic chain scission. The resulting viscosity loss can produce dimensional variation, splay, and reduced elongation at break when the compound is processed above the supplier’s moisture limit. For PA12 grades, drying is commonly performed in a desiccant-wheel dryer with closed-loop air circulation at an inlet temperature of 80 °C to 100 °C and a dew point of -30 °C or lower. The target residual moisture for melt processing is typically below 0.10 %, but the product datasheet for AUROmid PA12 TR55 black 9005 must confirm this threshold because the impact modifier can become tacky at the higher end of the drying range and lower temperatures may require extended residence time.
Two opposing failure modes define the drying window. Insufficient drying leaves unreacted water in the melt and produces hydrolysis; excessive drying temperature or retention time can initiate oxidative degradation in the impact-modifier phase or carbon-black-filled surface layer, shifting melt viscosity and darkening the granule. Dryers should be validated with dew-point sensors and inlet-air thermocouples rather than fixed timer settings.
During extrusion or injection molding, the material should be transferred through a sealed hopper and dried-air conveying line to avoid re-adsorbing ambient moisture. On production-scale injection-molding machines, PA12 compounds are generally processed with a melt-temperature window of 220 °C to 260 °C and a mold temperature of 40 °C to 80 °C. These are generic values for semicrystalline PA12; the AUROmid PA12 TR55 black 9005 grade may require a narrower window because the impact-modification package can alter viscosity and freeze-off behavior. The screw should provide an L/D ratio of at least 20:1 and a compression zone suitable for semicrystalline aliphatic polyamides; the use of a general-purpose screw with a short transition zone may lead to inhomogeneous melting and variable black-pigment dispersion. Back pressure and screw speed should be set to maintain a stable melt-cushion position without generating high-shear heating above the upper melt limit. Published data for this specific configuration are limited, so process locks should be established through MVR checks under ISO 1133-1 and part performance verification rather than by adopting generic PA12 settings without confirmation.
Melt residence time is a critical threshold. At the upper end of the melt-temperature window, residence times exceeding the supplier’s recommendation can increase free acidity and reduce molecular weight. The use of hot-runner systems adds residence time in the manifold; for impact-modified PA12, hot-runner channels should be sized to avoid dead spots and low-flow zones because stagnation can produce black-spec formation and loss of impact strength. If regrind is used, the regrind fraction should be limited because repeated melt history accelerates chain scission and modifier degradation. The acceptable regrind level is product-specific; a typical starting point for unfilled PA12 is 20 % to 30 %, but the AUROmid grade must be confirmed by lot testing.
The TR55 toughening package differentiates this grade from standard unfilled PA12 and from glass-filled PA12. Toughened PA12 grades are selected when components must absorb energy at low temperatures, such as cable clamps, pneumatic connectors, or automotive clips exposed to cold-start conditions. The trade-off is mechanical: impact modification typically reduces tensile modulus and may reduce heat deflection temperature when compared with an unmodified PA12 of the same base viscosity. For preliminary design, dry PA12 reference values from ISO 527-1/-2 place tensile yield stress near 40 MPa to 50 MPa and tensile modulus near 1300 MPa to 1600 MPa. The impact-modified grade is expected to exceed the notched Charpy impact energy of unmodified dry PA12 measured according to ISO 179-1/1eA, but the certified value must be taken from the supplier datasheet.
| Property | Test Method | PA12 Unfilled (Dry) | PA6 Unfilled (Dry) | PA66 Unfilled (Dry) |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01–1.02 g/cm³ | 1.13–1.15 g/cm³ | 1.13–1.15 g/cm³ |
| Tensile yield stress | ISO 527-1/-2 | 40–50 MPa | 70–90 MPa | 80–100 MPa |
| Tensile modulus | ISO 527-1/-2 | 1300–1600 MPa | 2800–3500 MPa | 3000–3600 MPa |
| Water absorption 23 °C/50 % RH | ISO 62 | 0.6–0.8 % | 2.5–3.0 % | 2.0–2.5 % |
| Melting peak | ISO 11357-3 | 174–180 °C | 220–225 °C | 260–265 °C |
The table indicates why PA12 is selected when lower moisture uptake and lower density outweigh the higher dry strength of PA6 and PA66. Within the PA12 family, the AUROmid PA12 TR55 black 9005 grade differs from glass-filled or carbon-fiber-reinforced PA12 because it is not a high-stiffness structural compound; it should be specified for ductility and impact resistance rather than load-bearing stiffness. The black 9005 pigmentation differentiates it from natural or light-colored PA12 grades; carbon black can provide uniformly low light transmittance and improved UV stability, but long-term weatherability must be verified by ISO 4892-2 or ISO 4892-3. Exact color matching outside the RAL 9005 specification should not be assumed.
Applications in chemical-contact areas take advantage of PA12’s resistance to aliphatic hydrocarbons, greases, and salt solutions. In automotive fluid lines and cable ducts, the material is exposed to intermittent thermal cycling and mechanical vibration; the design should account for the dry-to-conditioned dimensional change. Conditioning at 23 °C and 50 % relative humidity according to ISO 1110 produces a smaller linear change in PA12 than in PA6 or PA66, but the actual change in a black impact-modified compound may differ from generic values because the modifier phase and carbon-black network affect the free volume available for water uptake. Part qualification should therefore include dimensional measurements after accelerated moisture conditioning under ISO 1110 and, where relevant, after fuel exposure under the OEM specification.
Procurement specifications for AUROmid PA12 TR55 black 9005 PA12, Dry should reference the material’s ISO classification, processing controls, and the lot certificate. The standards in the following table are commonly used to verify polyamide 12 compounds; the exact data-block values are product-specific.
| Standard | Application |
|---|---|
| ISO 1043-1 | Symbols and abbreviated terms; PA12 designation |
| ISO 1874-1 | Designation system for polyamide molding and extrusion materials |
| ISO 1183-1 | Density determination |
| ISO 1133-1 | Melt volume-flow rate and melt mass-flow rate |
| ISO 527-1/-2 | Tensile properties |
| ISO 178 | Flexural properties |
| ISO 179-1/1eA | Charpy notched impact behavior |
| ISO 62 | Water absorption |
| ISO 75-1/-2 | Heat deflection temperature under load |
| ISO 11357-3 | Differential scanning calorimetry for melting and crystallization |
| IEC 62631-3-2 | Dielectric properties when electrical application is relevant |
| RoHS Directive 2011/65/EU | Hazardous substance restriction in electrical and electronic equipment |
| REACH Regulation 1907/2006 | Chemical safety and SVHC screening |
Conformance to these standards does not imply a specific set of certified values for this product; each lot certificate should list the measured data block. The material should not be considered flame-retardant unless an explicit UL 94 classification is supplied by Aurora Kunststoffe. Applications requiring food contact or medical approval must be confirmed against applicable FDA 21 CFR or EU 10/2011 documentation; no such claim is made here. Where the end-use environment includes continuous outdoor exposure, testing under ISO 4892-2 and ISO 4892-3 is required; carbon black pigmentation can reduce the degradation rate, but published data for this exact AUROmid grade remain limited. Equipment operators should validate melt residence time, dew point, and mold temperature with in-line sensors before release to production.
