| HS Code | 984070 |
| Density | 1.01 g/cm³ |
| Tensile Modulus Conditioned | 340 MPa |
| Tensile Stress At Yield Conditioned | 35 MPa |
| Elongation At Break Conditioned | >50% |
| Charpy Impact Strength 23 C Conditioned | No break |
| Charpy Notched Impact Strength 23 C Conditioned | No break |
| Melting Temperature | 178 °C |
| Vicat Softening Temperature B50 | 140 °C |
| Heat Deflection Temperature 1 8 Mpa | 40 °C |
| Water Absorption 24h At 23 C | 0.3% |
| Moisture Absorption 23 C 50 Rh | 0.7% |
| Shore D Hardness Conditioned | 55 |
As an accredited EMS-Grivory Grilamid L 20 HL black 9563 Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg net in sealed, moisture-resistant polyethylene-lined kraft bags, labeled with product grade and batch details, ensuring dry conditioned Nylon 12 pellets. |
| Container Loading (20′ FCL) | 20′ FCL: palletized bags of Grilamid L 20 HL black 9563, conditioned nylon 12, securely loaded and braced for transport. |
| Shipping | EMS-Grivory Grilamid L 20 HL black 9563 Nylon 12 (Conditioned) ships as non-hazardous thermoplastic pellets. Material is moisture-sensitive; use sealed moisture-barrier bags with desiccant. Keep cool, dry, and away from direct sunlight during transit. No special hazmat labeling required, but standard industrial handling and secure palletizing apply. |
| Storage | Store Grilamid L 20 HL black 9563 Nylon 12 in its original, tightly sealed container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and moisture to prevent water absorption and degradation. Maintain room temperature, avoid condensation, and reseal promptly after each use to preserve material properties. |
| Shelf Life | Shelf life is typically indefinite when stored dry, cool, and protected from UV light and contamination. |
Injection-moulded quick-connector bodies for gasoline vapour return circuits are produced from Grilamid L 20 HL black 9563 after desiccant drying to a residual moisture level below 0.10 wt%. The dryer operates at 80 °C for 4 h to 6 h with a supply air dew point of −30 °C; this prevents hydrolytic degradation during plastication. Barrel zones are profiled from 230 °C at the feed throat to 250 °C at the metering section and nozzle, with melt residence time above 260 °C restricted to 10 min. Mould temperature is held between 60 °C and 80 °C. Gate seal is confirmed by plotting part mass against increasing hold time; the plateau mass defines the minimum hold pressure duration rather than a nominal timer value. Mould shrinkage of 0.3% to 0.6% is applied to the critical internal collet retention diameter to compensate for both thermal contraction and later moisture growth.
Accelerated conditioning in accordance with ISO 1110 brings the mouldings to 0.6 wt% to 0.8 wt% moisture. The conditioned state reduces tensile modulus measured to ISO 527-1/-2 and increases notched Charpy impact measured to ISO 179-1/1eA relative to dry‑as‑moulded values. Because PA12 saturated water uptake is approximately 1.4 wt% to 1.6 wt% per ISO 62—substantially below PA6 at 9 wt%—the connector dimensions remain stable under underhood humidity ageing. The black 9563 package supplies UV protection at the carbon-black loading fixed by EMS; no additional colour masterbatch or processing plasticizer is introduced. Regrind from cold-runner sprues can be re-processed at 20 wt% for non-appearance connector bodies after the same drying procedure, but burst-pressure validation is required for each lot.
Compliance testing for the finished connector bodies follows SAE J2044 with thermal cycling and leak-decay procedures defined by the standard. Fuel exposure testing uses Fuel C according to ASTM D471 at 60 °C for 168 h; published data for this specific grade configuration is limited, so production-tool validation remains mandatory. Terminal parts are inserted into OEM evaporative emission circuits as male quick-connect fittings, where the low-moisture-uptake behaviour of PA12 avoids the dimensional swelling and release-force drift reported with PA6 designs after extended humidity exposure.
On heavy vehicle air brake systems, push-to-connect union bodies moulded from Grilamid L 20 HL black 9563 are conditioned to 0.6 wt% moisture before assembly. The governing standard for the coiled tubing assembly is ISO 7628-1; fitting bodies are additionally proof-tested at 1.5× the rated working pressure of the circuit. The failure mode in the field is typically not tensile rupture but stress-cracking at the brass insert knurl after exposure to calcium chloride brines. PA12 retains a measurable notched Charpy impact value at −40 °C to ISO 179-1/1eA, while its low amide density limits solvent uptake compared with PA6.
Formulation control for this application excludes plasticizer addition; the conditioned moisture content is the only ductility modifier. The black 9563 carbon-black package provides ultraviolet screening for exposed coil-tube fittings on cab chassis. In injection moulding, a two-plate cold-runner tool with edge gates of 60% nominal wall thickness is run at a melt temperature of 250 °C and a mould temperature of 80 °C. Holding pressure is held until gate freeze is confirmed by part mass stabilisation; the resulting semicrystalline morphology reduces post-mould shrinkage to 0.3% to 0.5%. Drying before moulding follows the same 80 °C for 4 h to 6 h protocol to 0.10 wt% moisture.
Production-scale experience indicates that insert preheating to 120 °C before overmoulding reduces residual hoop stress at the brass interface. The terminal product is a push-to-connect union body threaded per ISO 228-1, assembled into coiled polyamide tubing meeting ISO 7628-1. Each lot is proof-tested per ISO 7628-1; the acceptance criterion is defined by the standard rather than a fixed pressure value. Supplementary impact testing at −40 °C is performed after moisture conditioning to verify ductile behaviour at low temperature.
Underhood harness retention clips moulded from Grilamid L 20 HL black 9563 are assembled onto engine wire bundles and must retain clamp force after thermal shock from −40 °C to 125 °C per USCAR-2 Class 3. The conditioned moisture level is targeted at 0.6 wt% to 0.7 wt%; this level balances flexural modulus retention and low-temperature impact. Flexural modulus is measured to ISO 178, tensile properties to ISO 527-1/-2, and notched impact to ISO 179-1/1eA. The HL heat-stabiliser package permits continuous exposure near 120 °C; published data for this specific grade configuration is limited beyond 1,000 h, so validation is required for long-life programmes.
Formulation excludes plasticizer. The carbon-black pigmentation in 9563 provides UV stability for engine-bay service where direct sunlight reaches the harness after bonnet removal. The process window uses thin-wall flow paths with wall thickness between 1.0 mm and 2.0 mm, a barrel melt temperature of 245 °C, and a mould temperature of 60 °C. Injection speed is set high enough to prevent premature freeze-off of the clip hinge; holding pressure is applied until the gate freezes, indicated by no further part mass increase. A cold-runner layout with sub-gates onto the clip base is used; regrind is limited to 20 wt% and is not permitted for the flexible hinge section without impact testing.
Terminal parts are mounted with harness tape or fir-tree pins. Retention force after heat ageing and vibration is checked on an insertion plate with a hole diameter tolerance of ±0.1 mm; the acceptance criterion is no disengagement under pull-out force after 240 h at 125 °C. Published data for this specific configuration is limited, so production tool validation remains mandatory.
Underbody sensor bracket bushings moulded from Grilamid L 20 HL black 9563 are subjected to cyclic corrosion testing according to VDA 233-102 when vehicle-level validation demands zinc chloride electrolyte instead of the sodium chloride solution used in ISO 9227 NSS. The PA12 grade is selected because the low amide concentration reduces the rate of salt-induced stress cracking observed in PA6. Conditioning is controlled at 0.5 wt% moisture to limit dimensional movement during the thermal excursions of the corrosion cycle; the mouldings are assembled onto zinc-coated steel brackets tapped to M6 threads.
The black 9563 package provides UV protection; no additional stabilizer masterbatch is added. No plasticizer is present. Overmoulding of the metal insert is performed after insert preheating to 120 °C; barrel zones are 230 °C to 250 °C, and mould temperature is 70 °C. Hold pressure is maintained until gate freeze, and post-mould shrinkage is compensated at 0.3% to 0.6% on the inner bore after conditioning.
The terminal component is a vibration-damped bushing between the bracket and the ABS sensor harness. Each validation lot is tested by VDA 233-102 for 6 cycles; acceptance requires no crack visible at 10× magnification and no loss of push-out force below the lower tolerance limit defined by the assembly drawing.
| Application zone | Governing standard | Test condition | Terminal acceptance criterion |
|---|---|---|---|
| Fuel quick connectors | SAE J2044, ASTM D471 | 60 °C, Fuel C, 168 h | No leakage after thermal cycling |
| Air brake coil tube fittings | ISO 7628-1 | −40 °C to 100 °C | Proof test at 1.5× rated pressure |
| Underhood harness clips | USCAR-2 Class 3 | −40 °C to 125 °C | Retention force after 240 h at 125 °C |
| Corrosion-test brackets | VDA 233-102 | Cyclic corrosion, ZnCl₂ electrolyte | No crack at 10× magnification |
| Pneumatic push-in fittings | ISO 14743, ISO 175 | 1.0 MPa working pressure | Burst at 3× working pressure |
| Electrical insulation bushings | IEC 60664-1, UL 94 | 23 °C, 50% RH, 48 h | Thread gauge fit after ISO 1110 |
Pneumatic silencer housings and push-to-connect fitting bodies moulded from Grilamid L 20 HL black 9563 are processed on 80-tonne hydraulic injection presses with a three-zone screw having a compression ratio of 2.0:1 to 2.5:1. The material is dried to 0.10 wt% moisture at 80 °C for 4 h to 6 h, then moulded at a melt temperature of 240 °C and a mould temperature of 60 °C. Threaded bosses are produced to ISO 228-1 G-series dimensions; the post-mould shrinkage allowance of 0.3% to 0.5% is applied to the pitch diameter. After moulding, the parts are conditioned to 0.7 wt% moisture to stabilise dimensions and improve impact resistance at −20 °C.
Regulatory compliance follows ISO 14743 for push-in fittings for compressed air circuits. The terminal parts are assembled with nitrile O-rings and stainless steel gripping collets, producing a fitting rated for working pressures up to 1.0 MPa. Chemical resistance is screened in ISO VG 32 mineral oil at 70 °C for 168 h according to ISO 175; the low moisture uptake of PA12 prevents thread seizure in humid compressed air lines. The black 9563 grade avoids the need for external mould release on sealing faces; no plasticizer or process oil is added to the compound. Regrind is limited to 15 wt% for pressure-containing bodies and must be dried with virgin material.
Field experience with PA12 silencer bodies shows that the primary processing risk is jetting at the gate when injection speed is excessive in thin-wall bosses; a short shot study is used to set the speed profile. The finished silencer must pass a burst test at 3× rated working pressure and a leak test at 1.0 MPa with no visible bubble formation over 30 s in water immersion. Published data for this specific configuration is limited; tool trials remain mandatory.
Electrical insulation bushings and cable gland locknuts moulded from Grilamid L 20 HL black 9563 are dimensioned after 48 h storage at 23 °C and 50% relative humidity because the conditioned moisture content of 0.6 wt% to 0.7 wt% produces a measurable diameter increase compared with the dry‑as‑moulded state. The grade is evaluated for insulation coordination according to IEC 60664-1 at pollution degree 2; the material carries a UL 94 HB classification. The grade is not used where glow-wire requirements per IEC 60695-2-11 require a V0 or GWIT rating without additional flame-retardant modification.
Formulation contains no halogenated flame retardant and no plasticizer. The black 9563 pigmentation provides sufficient carbon-black loading for UV stability in outdoor electrical enclosures. Processing uses a melt temperature of 240 °C and a mould temperature of 50 °C; thin ribs of 0.8 mm require high injection speed and packing pressure until gate seal. Drying at 80 °C for 4 h to 6 h precedes moulding. Post-mould shrinkage of 0.4% is applied to the locknut thread diameter; after conditioning, the thread engagement remains within the tolerance band for ISO 261 metric threads.
Terminal parts include hexagonal locknuts and snap-in bushings for electrical panels. Each lot is checked for dimensional stability after accelerated conditioning per ISO 1110; the acceptance criterion is a thread ring gauge fit with no crack after assembly at −10 °C. Published data for this specific grade configuration is limited, so panel-assembly validation is required.
Low-temperature impact testing to ISO 179-1/1eA at −30 °C is the primary screening criterion for injection-moulded ski touring binding adjustment plates produced from Grilamid L 20 HL black 9563. The conditioned moisture content is held at 0.7 wt%; this level raises notched Charpy impact relative to dry‑as‑moulded material while avoiding the excessive dimensional movement observed at saturation. The compound is moulded at a melt temperature of 250 °C and a mould temperature of 60 °C. A hot-tip gate into the central web is used, and holding pressure is maintained until gate freeze; post-mould shrinkage of 0.3% to 0.6% is compensated on the binding screw hole pattern. The black 9563 package provides UV resistance for high-altitude exposure. No plasticizer is added.
Formulation excludes processing plasticizer; regrind is limited to 10 wt% for cold-impact parts because repeated processing reduces Charpy impact in PA12. Chemical resistance is screened in de-icing salt solution at −20 °C for 168 h according to ISO 175. The finished plate is mounted in a binding system tested to ISO 13992 for ski touring release mechanisms; the PA12 component contributes ductile low-temperature response and dimensional stability after 72 h moisture saturation. Terminal parts are black adjustment plates assembled with stainless steel screws into the ski binding housing; no field failure is accepted below −30 °C impact. Published data for this specific grade configuration is limited; production-scale cold-room testing remains mandatory.
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EMS-Grivory Grilamid L 20 HL black 9563 Nylon 12, Conditioned is classified as an unreinforced heat- and light-stabilized polyamide 12 injection-molding grade. The designation identifies a black carbon-black-pigmented PA12 homopolymer with an HL stabilization package intended to delay oxidative and ultraviolet-induced embrittlement in molded parts exposed to outdoor or under-hood thermal loads. The term “Conditioned” in this context refers to the equilibrium moisture state established under ISO 1110:2019 and ISO 291:2008 at 23 °C and 50 % RH. In this state, the PA12 matrix absorbs approximately 0.7 wt% water, which acts as an internal plasticizer and changes the mechanical response relative to the dry-as-molded material. This distinction is not a surface treatment or coating but a reversible thermodynamic water-uptake condition that components encounter during service in humid air.
The conditioned property set is particularly relevant for snap-fit, press-fit, and clip designs because absorbed water alters stiffness and fracture behavior. In the dry state, tensile modulus measured according to ISO 527-1/-2 is approximately 1600 MPa; after conditioning, the modulus shifts to approximately 1100 MPa. Yield stress follows a similar path from 45 MPa to 39 MPa, while yield strain increases from 5 % to 15 %. This shift is not a material defect but a consequence of water interaction with the amide groups in the PA12 backbone. Components designed solely from dry-modulus data may therefore exhibit lower spring-back force after moisture saturation, while thin-wall sections may become more ductile and less prone to brittle fracture. The reverse is observed when parts are dried in closed automotive engine compartments with continuous low relative humidity: stiffness increases and elongation at yield decreases toward dry values.
Charpy notched impact resistance measured at 23 °C according to ISO 179/1eA increases from approximately 5 kJ/m² in the dry state to approximately 7 kJ/m² after conditioning. The unnotched value remains in the no-break regime at 23 °C. These values place unreinforced PA12 below toughened PA66 or impact-modified PA6 in notched impact energy, but the low-temperature ductility of the PA12 backbone is retained further down the temperature range than many standard PA6 grades. The property table below summarizes the dry-to-conditioned shift for the main design inputs.
| Property | Test standard | Dry (0.10 % moisture) | Conditioned (23 °C, 50 % RH) |
|---|---|---|---|
| Density | ISO 1183-1 | 1010 kg/m³ | 1010 kg/m³ |
| Water absorption at saturation | ISO 62 | — | 1.4 % |
| Moisture uptake at 23 °C/50 % RH | ISO 1110 | — | 0.7 % |
| Tensile modulus | ISO 527-1/-2 | 1600 MPa | 1100 MPa |
| Yield stress | ISO 527-1/-2 | 45 MPa | 39 MPa |
| Yield strain | ISO 527-1/-2 | 5 % | 15 % |
| Nominal strain at break | ISO 527-1/-2 | >50 % | >50 % |
| Charpy notched impact | ISO 179/1eA | 5 kJ/m² | 7 kJ/m² |
| Charpy unnotched impact | ISO 179/1eU | no break | no break |
| Heat deflection temperature, 1.8 MPa | ISO 75-2/A | 50 °C | 50 °C |
| Heat deflection temperature, 0.45 MPa | ISO 75-2/B | 120 °C | 120 °C |
| Vicat softening temperature, VST/A50 | ISO 306 | 175 °C | 175 °C |
| Melting point | ISO 11357-3 | 178 °C | 178 °C |
The black 9563 color package does more than provide opacity; the carbon black functions as a UV screening agent. In outdoor exposure programs, black unreinforced PA12 grades generally show better surface gloss retention and less chalking than natural or light-colored counterparts under xenon-arc testing according to ISO 4892-2, cycle 1. Published data for this specific grade under multi-year weathering programs is limited, and outdoor suitability must be verified with part-specific UV dose and temperature profiling. Continuous service temperature for heat-stabilized PA12 is commonly cited in the 80 °C to 100 °C range, but creep and oxidative aging at the upper boundary depend on installed stress, oxygen access, and surface-to-volume ratio. The HL additive package raises oxidative induction time relative to non-stabilized PA12, but the improvement is not unbounded: prolonged exposure above 120 °C in air will consume stabilizer reserves and lead to carbonyl formation, yellowing, and embrittlement. Automotive engine-compartment parts should therefore be assessed against the specific time-temperature envelope, not a single continuous-use rating.
Injection molding of Grilamid L 20 HL black 9563 requires pre-drying to a residual moisture content below 0.10 %; a desiccant-bed dryer set to 80 °C for 4 h to 6 h is the standard starting point. Pellets stored in open bins at relative humidity above 60 % can reach 0.15 % moisture within hours, producing surface splay, nozzle drool, and a measurable loss in molecular weight through hydrolysis. Production-scale experience on reciprocating screw machines with 18:1 to 24:1 L/D barrier screws indicates that a melt temperature window of 230 °C to 270 °C and a mold temperature of 40 °C to 80 °C maintain sufficient crystallization rate without freezing the flow front in thin ribs. If the mold surface falls below 40 °C, the skin layer solidifies before packing pressure fully acts, increasing injection-molded residual stress and reducing effective weld-line elongation. Holding pressure in the range of 50 MPa to 90 MPa and a screw back pressure of 0.3 MPa to 0.7 MPa are typical starting values. Hot-runner systems should use externally heated manifolds with balanced melt channels; dead spots or excessive residence time above 10 min at melt temperature promote thermal degradation, which appears as brown streaks and a drop in melt viscosity.
Moisture content verification is preferably performed by a halogen moisture analyzer calibrated against Karl Fischer titration in accordance with ISO 15512. The dew-point method can report free surface water but will not reliably detect internal pellet moisture. Batches conditioned inadvertently above 0.10 % should be re-dried at 80 °C for 4 h to 6 h; re-drying at temperatures above 90 °C risks oxidative yellowing of the stabilizer package and is not recommended for black grades despite their masking of color shift.
The melt viscosity of L 20 HL is indicative of an easy-flow unreinforced PA12. Molders may observe short-shot improvement by raising the nozzle zone to 260 °C, but the maximum recommended melt temperature of 270 °C should not be exceeded for more than 10 min. Screw recovery rate should be set so that the metering zone is not starved; high screw speeds above 200 rpm on small machines may generate frictional heat beyond the set barrel profile. Back pressure values above 0.7 MPa increase shearing and can accelerate additive decomposition; this is visible as a yellowish gate blush in black parts. For valve-gated hot runner systems, gate freeze time should be balanced against packing time to avoid sink marks in thick bosses without inducing jetting in thin wall sections.
Polyamide 12 has a lower amide group density than PA6 and PA66. The practical consequence is a lower equilibrium moisture content and reduced dimensional growth in humid environments. ISO 62 saturation water absorption for this grade is approximately 1.4 %, compared with roughly 9.5 % for unreinforced PA6 and 8.5 % for unreinforced PA66. This lower water uptake makes the grade suitable for connectors, clips, and bracketry that must maintain dimensions after exposure to splash water, cabin humidity, or outdoor rain. It should not be used with strong mineral acids, elevated-temperature methanol, or continuous hot-water service above 80 °C, where hydrolysis of the amide bond can reduce molecular weight. Aliphatic and aromatic hydrocarbons, fuels up to moderate temperatures, and many oils show limited stress-cracking effects with PA12, but compatibility with aggressive ethanol or biodiesel blends requires component-level immersion testing because fuel composition varies regionally.
When evaluated as a direct substitution for unreinforced PA6 or PA66 in injection-molded clamps and fasteners, the difference is usually a trade between absolute dry stiffness and moisture stability. PA66 in the dry state has a tensile modulus near 3000 MPa, but after conditioning at 23 °C/50 % RH the modulus can fall by roughly 30 % to 40 %; PA12 starts lower and falls by about 30 % in the same environment. The absolute conditioned modulus of PA12 remains below that of conditioned PA66, but dimensional change is substantially lower. The PA12 grade also has a density of 1010 kg/m³, which is about 11 % lower than PA66 and 10 % lower than PA6, giving mass reduction without the cost or anisotropy of glass-fiber reinforcement. Compared with a 30 % glass-fiber PA66, Grilamid L 20 HL black 9563 is not a stiffness substitute: the reinforced material exhibits a dry tensile modulus above 8000 MPa, but it lacks the same low-temperature impact ductility and has higher density and warpage sensitivity. Selection is therefore dominated by whether the application is stiffness-critical or ductility- and moisture-stability-critical.
Within the EMS Grilamid L 20 family, the HL designation differs from the H designation by the addition of a light-stabilizer package. For indoor applications with no UV exposure, a non-light-stabilized heat-stabilized PA12 may be sufficient; for exterior clips or cable ties, the black 9563 color and light stabilization reduce surface oxidation. Direct published comparison data between Grilamid L 20 H and Grilamid L 20 HL under identical weathering conditions is limited, so the UV resistance benefit should be confirmed by coupon exposure in the intended installation orientation.
Laboratory conditioning of PA12 test specimens under ISO 1110 is accelerated; service absorption may take weeks or months depending on wall thickness and ambient humidity. A 2 mm section may approach equilibrium within 30–60 days at 23 °C/50 % RH, while a 4 mm section can require several months. This time dependency means that parts assembled shortly after molding may initially behave closer to the dry state, with higher spring force and lower impact energy, then shift toward conditioned behavior over the first service season. For safety-critical snap-fits, the design envelope should cover both dry and conditioned extremes, because dry material is stiffer and can fracture at low temperatures, while conditioned material may allow creep or loss of retention in elevated humidity.
Low-temperature performance of PA12 is a distinguishing feature in snap-fit and moving-clip applications. Unreinforced PA12 retains more ductility at −40 °C than many unreinforced PA6 grades; however, published notched impact data at −40 °C for this specific black 9563 lot is limited. Part geometry, gate location, and weld-line presence dominate low-temperature failure more than the base resin. For cold-climate exterior components, the design should avoid sharp notches, knit lines in high-tensile zones, and excessive orientation in the flow direction. Process conditions that generate high frozen-in stress—low mold temperature, excessive packing pressure, or overly long flow paths—can reduce the low-temperature ductility that would otherwise be expected from PA12.
Typical injection-molded components cited in EMS product documentation for this grade include cable clamps, fuel line quick connectors, pneumatic tube fittings, snap-fit covers, sensor housings, clips for body panels, and cable ties. These applications rely on the combination of low moisture uptake, hydrocarbon resistance, and the ability of the conditioned PA12 matrix to survive repeated assembly deflection. For fuel contact components, the specific fuel blend, temperature profile, and service pressure must be validated against SAE J2043 or equivalent, because ethanol and biodiesel fractions can plasticize or stress-crack polyamides to varying degrees. Published data for this specific black 9563 configuration under aggressive fuels is limited, and the absence of test data should not be interpreted as fuel compatibility.
In connector and sensor applications, the insulation resistance and tracking resistance of unreinforced PA12 are relevant. Typical values for this grade include a comparative tracking index of 600 V under IEC 60112 and a volume resistivity above 10¹³ Ω·m under IEC 60093; however, the black carbon content can reduce surface resistivity compared with natural or unfilled versions, so creepage and clearance analysis must use the actual material certificate. The grade is not rated for all electrical insulation classes; continuous use in high-voltage connectors should be verified against the system’s insulation coordination requirements under IEC 60664-1.
Regulatory declarations for REACH, RoHS, and food-contact status are not intrinsic properties of the base polymer and must be obtained from the supplier for the specific batch and color. The black 9563 formulation contains carbon black; if pyrolysis or carbon-particle release is a concern in cleanroom or laser-marking operations, alternative natural grades may be evaluated. The material is generally considered weldable by hot-plate, ultrasonic, and laser-through transmission methods, but black pigment absorbs laser energy and may reduce the transmission welding window unless a suitable laser wavelength and absorber package is used.
