| HS Code | 749742 |
| Density | 1.01 g/cm³ |
| Water Absorption 24 H 23 C | 0.2 % |
| Moisture Absorption At Equilibrium 50 Rh | 0.5 % |
| Melting Temperature | 178 °C |
| Glass Transition Temperature | 50 °C |
| Coefficient Of Linear Thermal Expansion 23 80 C | 120 µm/(m·K) |
| Tensile Modulus Conditioned | 1500 MPa |
| Tensile Stress At Yield Conditioned | 45 MPa |
| Elongation At Yield Conditioned | 7 % |
| Elongation At Break Conditioned | >50 % |
| Charpy Impact Strength Notched 23 C Conditioned | 8 kJ/m² |
| Charpy Impact Strength Unnotched 23 C Conditioned | No break |
| Heat Deflection Temperature B 0 45 Mpa | 145 °C |
| Shore D Hardness | 75 |
As an accredited Aurora Kunststoffe AUROmid PA12 TR90 black 9005 PA12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg sealed moisture-proof bag of Aurora Kunststoffe AUROmid PA12 TR90 black 9005 PA12, conditioned granules. |
| Container Loading (20′ FCL) | A 20′ FCL container securely loaded with Aurora Kunststoffe AUROmid PA12 TR90 black 9005 PA12, conditioned, ready for safe transport. |
| Shipping | Ship as non-hazardous thermoplastic pellets in sealed, moisture-proof bags. Conditioned PA12 absorbs minimal humidity, but keep dry to prevent processing issues. Use standard dry freight with temperature-controlled storage recommended. Avoid direct sunlight and excessive heat. Include proper product labeling and documentation for customs clearance. |
| Storage | Store in original sealed packaging in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Maintain ambient conditions to preserve the conditioned moisture content of the PA12. Keep containers tightly closed when not in use, protect from mechanical damage, and avoid prolonged exposure to high humidity or condensation. |
| Shelf Life | Shelf life: 2 years when stored in original, sealed packaging, dry, cool, and protected from UV light. |
Predrying of AUROmid PA12 TR90 black 9005 PA12, Conditioned to a residual moisture content below 0.10 % by weight is the first processing constraint in prescription-spectacle-frame injection moulding. The conditioned moisture level supplied in the packaging is intended to bring the moulded article closer to equilibrium at 23 °C and 50 % relative humidity, but it is not a substitute for melt-phase drying. The granulate is dried in a desiccant dryer with a dew point of −30 °C to −40 °C, at 80 °C for 4 h to 6 h, before melt processing. Failure to maintain residual moisture below 0.10 % produces hydrolytic chain scission, silver streaking on polished black 9005 surfaces, gas porosity at the hinge insert, and a measurable reduction in notched impact resistance. Melt processing is carried out on injection moulding machines with screw L/D ratios of 20:1 to 25:1 and compression ratios of 2.0:1 to 2.5:1. Melt temperature is held between 240 °C and 260 °C, with 250 °C as the preferred starting point for multi-cavity frame tools. Mould temperature is maintained at 50 °C to 70 °C; higher mould temperatures improve weld-line strength at the orbital rim but increase cycle time and the tendency for sink formation opposite the metal hinge inserts. Hold pressure is set between 60 MPa and 80 MPa, with hold time determined by gate-freeze studies using short-shot sequences. Valley-gated hot runners and sequential valve gates are used to reposition weld lines away from the bridge and temple end pieces.
Industry compliance for prescription frames is anchored to ISO 12870:2016, which governs frame material mechanical stability, dimensional tolerance, resistance to perspiration, and finish durability. European import requires REACH and RoHS 2011/65/EU documentation. Mechanical characterisation follows ISO 527-2 for tensile modulus, ISO 178 for flexural modulus, ISO 179-1/1eA for notched Charpy impact at 23 °C, and ISO 75-2 for heat deflection temperature. Batch traceability includes melt volume-flow rate to ISO 1133-1 and moisture content to ISO 15512 Method B. Formulation addition is 100 % virgin material for first-surface cosmetic components. If sprues and runners are reintroduced, the regrind fraction is limited to 15 % by weight blended with 85 % virgin material, and the regrind is used only in internal temple cores or non-visible sections. No additional black masterbatch is added because black 9005 is pre-compounded into the polyamide 12 matrix. External lubricants, nucleating agents, or impact modifiers are not specified for this grade. Terminal finished product types include prescription spectacle frames, sunglass frames, reading glasses, full-rim frames, half-rim frames, shield-type frame fronts, and replacement temple arms where the black 9005 colour and conditioned PA12 toughness are required.
In safety-spectacle frame production, gate location is constrained by the lens-retention groove, the side-shield attachment slot, and the high-velocity impact test zones defined in EN 166:2001, ANSI/ISEA Z87.1-2020, and ISO 16321-1:2021. Gates are moved to the temple hinge neutral axis or to a removable cold sprue tab so that weld lines do not cross the orbital rim, where impact stresses concentrate. The material is processed at 100 % virgin AUROmid PA12 TR90 black 9005 PA12, Conditioned; regrind is excluded from impact-rated frame components because contamination-induced stress concentrations reduce notched impact reliability. The black 9005 pre-compound is used without additional colourants, and no release agent is applied to the mould because surface migration can alter friction at the lens-retention interface and side-shield slots. Melting is conducted at 235 °C to 255 °C, with mould temperature maintained at 40 °C to 60 °C to avoid excessive post-mould crystallinity that can lower impact toughness. Moulded frames are conditioned at 23 °C and 50 % relative humidity for at least 24 h before impact testing, because dry-as-moulded polyamide 12 may exhibit lower notched impact energy than the conditioned state. Terminal finished product types include safety spectacles, over-spectacles, goggle frames, face-shield headgear frames, and side-shield carrier frames.
Cytotoxicity and skin-sensitisation data generated according to ISO 10993-5:2009 and ISO 10993-10:2010 are the first technical gate for body-worn medical device housings moulded from AUROmid PA12 TR90 black 9005 PA12, Conditioned. The material is used for short- to medium-duration skin contact in wearable diagnostic and therapeutic device enclosures. The grade is processed at 100 % virgin material for all patient-contacting surfaces; regrind is limited to 10 % for internal non-patient-contact clips, battery covers, or reinforcement ribs only when the proprietary validation file supports it. Drying before moulding reduces residual moisture to below 0.08 % using a desiccant dryer at 80 °C for 5 h to 6 h, because medical micro-moulding is less tolerant of outgassing and surface defects than larger consumer parts. Micro-moulding machines with screw diameters from 15 mm to 25 mm are used in an ISO 7 cleanroom. Melt temperature is held between 225 °C and 245 °C, balancing flow length against molecular weight retention; mould temperature is set at 60 °C to 80 °C to stabilise thin-wall dimensions. Release agents are not allowed, and mould textures are selected to minimise skin irritation at contact edges. Terminal finished product types include hearing-aid shells, body-worn physiological monitor enclosures, wearable infusion pump housings, and medical data-logger enclosures.
| Standard | Test or requirement | Application boundary |
|---|---|---|
| ISO 10993-1:2018 | Biological evaluation planning | Skin-contacting external device housing |
| ISO 10993-5:2009 | In vitro cytotoxicity | Extraction test on moulded plaques |
| ISO 10993-10:2010 | Skin sensitisation and irritation | Repeated skin contact |
| ISO 10993-23:2021 | In vitro irritation | Reconstructed human epidermis model |
| ISO 13485:2016 | Quality management system | Moulding and assembly environment |
| EU MDR 2017/745 | General safety and performance | Class I and Class IIa device enclosures |
Automotive interior harness clips moulded from AUROmid PA12 TR90 black 9005 PA12, Conditioned require retention after thermal cycling from −40 °C to 85 °C without cracking at the flexural hinge. Industry compliance is assessed under IATF 16949:2016 process control, ISO 3795 interior flammability, REACH, and RoHS 2011/65/EU. Formulation addition is 80 % virgin material with 20 % reprocessed sprues and runners; the regrind stream is kept to one thermal history and is never blended with post-consumer recycled feed. Production runs in multi-cavity tools of 8 to 32 cavities using cold runners, with cavity-pressure sensors controlling switchover at 40 MPa to 60 MPa. Melt temperature is set at 250 °C to 270 °C, and mould temperature is held at 60 °C to 90 °C. Terminal finished product types include wire-harness clips, door-panel fasteners, cable conduits, and trim-retention clips with snap-fit locking geometry.
A rotating-platen two-shot mould is specified for over-ear headphone headbands when the structural core is AUROmid PA12 TR90 black 9005 PA12, Conditioned and the cushioning surface is a thermoplastic elastomer. The black 9005 pre-compound contains carbon black that absorbs near-infrared radiation, so through-transmission laser welding with a clear PA12 counterpart is not recommended; joints are designed as mechanical interlocking snap fits or adhesive bonding with cyanoacrylate after corona treatment. Compliance for consumer audio equipment is documented to IEC 62368-1:2023, UL 94 HB for enclosure flammability, REACH, and RoHS 2011/65/EU. Addition ratio is 90 % virgin material with 10 % regrind restricted to internal rib sections that are not visible on the outer high-gloss black surface. Regrind is not used in the exposed headband surface because black 9005 gloss consistency is affected by repeated heat history. Melt temperature is set at 230 °C to 250 °C, mould temperature at 50 °C to 70 °C, and valve gates are positioned under the ear cup attachment area to hide gate vestiges. Terminal finished product types include over-ear headphone headbands, ear cup yokes, hinge brackets, and snap-fit battery covers for personal audio devices.
Orthotic shell components are injection moulded from AUROmid PA12 TR90 black 9005 PA12, Conditioned only when the design requires repeated snap-fit attachment points, thin-wall flexural fatigue resistance, and tighter dimensional tolerance than vacuum-formed copolyester sheet can provide. Published data for this specific configuration is limited, so each application requires verification of flexural fatigue and skin-contact performance under ISO 10993-5:2009 and ISO 10993-10:2010. The regulatory boundary is EU MDR 2017/745, supported by ISO 22523:2020 for external orthoses. Formulation addition is 100 % virgin material; no regrind is used because the shell is a load-bearing external medical device component. Drying is performed to below 0.08 % residual moisture at 80 °C for 5 h to 6 h. Injection moulding is carried out with melt temperature between 235 °C and 250 °C and mould temperature at 70 °C to 90 °C, which promotes higher crystallinity for fatigue resistance but increases moulded-in stress at sharp corners. Shell wall thickness is typically 2.0 mm to 3.5 mm, with hold pressure from 65 MPa to 85 MPa and cooling time determined by part ejection below the glass transition of the conditioned PA12 matrix. Terminal finished product types include ankle-foot orthosis shell sections, spinal brace shells, orthotic joint covers, and structural clips for external orthotic interfaces.
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Aurora Kunststoffe AUROmid PA12 TR90 black 9005 PA12, Conditioned is a black-pigmented injection moulding compound based on a polyamide 12 backbone formulated to retain the characteristic toughness and solvent resistance of PA12 while offering the dimensional behaviour associated with TR90-class transparent polyamide resins. The designation RAL 9005 identifies a jet-black colour concentrate; the notation “Conditioned” indicates that quoted mechanical data refer to specimens equilibrated under ISO 291 at 23 °C and 50 % RH rather than to dry-as-moulded property levels. The product is normally supplied as cylindrical granules for conventional reciprocating screw injection moulding. Because lot-specific certificates must be consulted for guaranteed limits, the values presented here are class-typical for conditioned PA12 TR90 black grades and are not purchase specifications.
Moisture uptake in polyamides reduces yield stress and modulus while increasing elongation at break and notched impact energy. For a PA12-base material, equilibrium moisture at 23 °C and 50 % RH is lower than that of polyamide 6 or polyamide 66 because the amide-group density of the C12 repeat unit is lower. In conditioned PA12 TR90, the loss in tensile modulus relative to the dry state is commonly 5 % to 15 %, whereas notched Charpy impact may rise by 10 % to 20 %. The exact shift depends on pigment loading, molecular weight, part wall thickness, and storage history. Conditioning should not be confused with water immersion; immersion per ISO 62 produces higher saturation moisture content than ISO 291 standard atmosphere conditioning. Accelerated conditioning may be performed under ISO 1110, but datasheets for polyamide compounds generally remain anchored to 23 °C/50 % RH equilibration.
Table 1 assembles typical mechanical, thermal, and processing data for PA12 TR90 black compounds in the conditioned state. The entries are screening values, not guaranteed limits for the Aurora Kunststoffe grade.
| Property | Standard | Typical conditioned range |
|---|---|---|
| Density | ISO 1183-1 | 1.00–1.02 g/cm³ |
| Tensile modulus of elasticity | ISO 527-2 | 1400–1700 MPa |
| Tensile yield stress | ISO 527-2 | 55–65 MPa |
| Tensile elongation at break | ISO 527-2 | > 50 % |
| Flexural modulus | ISO 178 | 1500–1800 MPa |
| Charpy notched impact strength, 23 °C | ISO 179-1/1eA | 8–12 kJ/m² |
| Heat deflection temperature A, 1.8 MPa | ISO 75-2 | 95–115 °C |
| Melt volume-flow rate 250 °C/5 kg | ISO 1133-1 | 10–20 cm³/10 min |
| Mould shrinkage, parallel, 2 mm plaque | ISO 294-4 | 0.4–0.6 % |
| Water absorption, saturation at 23 °C | ISO 62 | 1.2–1.6 % |
Processing AUROmid PA12 TR90 black 9005 on standard single-flight injection moulding machines generally requires a melt temperature window of 240 °C to 270 °C and a mould temperature of 30 °C to 60 °C for unfilled, thin-wall geometries. The screw L/D ratio should be at least 20:1, with a compression ratio of 2.0:1 to 2.5:1. Melt residence times above 10 min at the upper end of the window can produce thermal degradation; black RAL 9005 pigmentation may mask early yellowing, so melt-pressure drift and gloss shift should be monitored. Backpressure is typically held between 3 MPa and 8 MPa to avoid excessive shear heating. Nozzle melt pressure in thin-wall frame applications is often in the range of 80 MPa to 120 MPa, depending on flow length and wall section.
The suffix “Conditioned” does not automatically mean that the granules contain equilibrium moisture at the point of processing; it defines the specimen state used for the reported mechanical dataset. Pellet moisture must be verified by ISO 15512. If the material is deliberately moisture-conditioned before moulding, values above 0.15 wt% are generally unsuitable for high-gloss black surfaces unless the machine is equipped with effective vacuum venting. Splay, nozzle drool, and intermittent melt flow have been observed on production equipment when conditioned pellets were processed without closed storage or vented-barrel configuration. When ambient storage exceeds 60 % RH, sealed hopper storage or dry-air blanketing is used to prevent surface condensation and lot-to-lot moisture drift.
Black 9005 pigmentation introduces a carbon black or nigrosin-based colourant package. This may increase stiffness by 2 % to 5 % relative to natural TR90 and may alter moisture absorption by 0.1 wt% to 0.3 wt% depending on the pigment carrier. The use of RAL 9005 does not, by itself, confer ESD properties. Surface resistivity measured by IEC 62631-3-2 may remain above 10^12 Ω unless a conductive pigment is explicitly formulated. Regrind from sprues and runners may be incorporated up to 20 wt% in noncritical components if the material has not been degraded by excessive residence time. Repeated processing above 3 cycles is not recommended for optically demanding black surfaces because pigment dispersion and molecular weight reduction begin to affect Charpy impact and weld-line strength.
In eyewear and face-shield applications, conditioned PA12 TR90 black 9005 is typically subjected to dimensional stability testing under ISO 12870, which includes closure and opening cycle tests, mechanical stability, and resistance to sweat and cosmetic agents. The lower moisture uptake of PA12 relative to PA6 reduces the magnitude of dimensional shift after exposure to 37 °C artificial sweat; however, black-pigmented grades may show a slightly higher surface temperature rise under infrared drying than natural grades. Class-typical conditioned notched impact values support cold forming of spectacle arms and snap-fit hinges when the gate region is located away from the high-strain hinge area. A gate diameter of 0.8 mm to 1.2 mm and a hold pressure of 50 MPa to 70 MPa are frequently used for thick-to-thin transitions in frame fronts; these values must be confirmed on the specific tool.
Because PA12 TR90 is an amorphous-to-low-crystallinity polyamide, it does not exhibit the sharp melting point of semi-crystalline PA12. Differential scanning calorimetry per ISO 11357-3 typically shows a melting enthalpy below 10 J/g for transparent grades, often with no detectable crystalline melting peak in pigmented black formulations if rapid cooling is used. The product therefore has lower tensile modulus than glass-filled polyamides but offers lower density and better dimensional stability in moisture-cycling environments than natural PA6. This profile supports use in snap-fit clips, cable clips, and housings where repeated flexural loading and chemical exposure are present.
Compared with an unfilled semi-crystalline PA12, conditioned PA12 TR90 typically shows higher stiffness, higher heat deflection temperature, and lower elongation at break because the amorphous or low-crystallinity structure suppresses extensive cold drawing. The TR90 designation indicates that cyclic or aromatic comonomers interrupt crystallization; this distinguishes it from standard opaque PA12 grades. Compared with conditioned PA6, the PA12 TR90 grade offers lower equilibrium moisture absorption and therefore more stable flexural modulus after humidity cycling. Compared with polycarbonate, PA12 TR90 has lower optical clarity in black-pigmented form but higher solvent stress-crack resistance and easier processing at lower barrel temperatures. Unfilled PA12 TR90 is not a direct replacement for short-glass PA12 when flexural modulus above 2500 MPa is required; such applications require a glass-filled polyamide grade.
Chemical resistance should be assessed using ISO 22088-3 bent-strip specimens for stress-cracking resistance or ASTM D543 for liquid absorption and property retention. The grade is generally resistant to aliphatic hydrocarbons, oils, greases, and hot water up to 80 °C; the black-pigmented surface may show slight dye extraction from external oils. Exposure to concentrated mineral acids, zinc chloride solutions, and some halogenated hydrocarbons can cause surface attack or stress cracking. Continuous immersion in strong alcohols or aggressive cosmetic formulations should be evaluated on the finished component rather than assumed from PA12 general chemical-resistance tables.
Depending on target market, the grade may be assessed under EU 10/2011 for food-contact plastics if specifically requested, but the black 9005 pigment package must be confirmed compliant for the intended contact simulant and time–temperature condition. The material is not marketed as medical-grade or implantable; customers requesting medical use shall verify biocompatibility under ISO 10993-5 and ISO 10993-10 on the final sterilised component. RoHS obligations for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE are documented according to IEC 62321 test methods. REACH SVHC content should be confirmed through the supplier’s current declaration.
| Assessment | Reference / Method | Typical reporting status |
|---|---|---|
| Restriction of hazardous substances | RoHS Directive 2011/65/EU, Annex II | Complies when total lead, mercury, cadmium, hexavalent chromium, PBB and PBDE do not exceed the Annex II maximum concentration values |
| REACH SVHC declaration | Regulation EC 1907/2006, Article 33 | Supplier SDS should declare SVHC above 0.1 wt%; no SVHC above threshold is known for the base PA12 TR90 black grade |
| Food-contact assessment | Commission Regulation EU 10/2011 | Not automatically suitable; pigment and additive compliance with the intended simulant and migration limits must be confirmed for the specific article |
| Biocompatibility | ISO 10993-1, ISO 10993-5, ISO 10993-10 | Not supplied as a medical-grade material; end-user validation on sterilised finished devices is required |
| Electrostatic performance | IEC 62631-3-2, IEC 61340-5-1 | RAL 9005 black pigment does not imply ESD-safe surface resistivity |
