| HS Code | 821955 |
| Base Resin | Polyamide 11 (PA11) |
| Appearance | Black fine powder |
| Density | 1.04 g/cm³ |
| Melting Point | 178 °C |
| Bulk Density | 0.60 g/cm³ |
| Particle Size Distribution | 95% below 80 µm |
| Shore Hardness D | 74 |
| Tensile Strength | 55 MPa |
| Elongation At Break | 300% |
| Water Absorption 24h | 0.3% |
| Impact Strength | No break (high impact resistance) |
| Abrasion Resistance | Excellent |
| Chemical Resistance | Resistant to hydrocarbons, oils, solvents, and weak acids |
| Uv Weather Resistance | Good |
As an accredited Arkema Rilsan Fine Powders MC BLACK 820 MAC PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsan Fine Powders MC BLACK 820 MAC PA11 comes in 25 kg moisture-resistant multilayer bags. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Arkema Rilsan Fine Powders MC BLACK 820 MAC PA11, packed on pallets, secured and protected for safe transport. |
| Shipping | Arkema Rilsan Fine Powders MC BLACK 820 MAC PA11 is shipped as a fine, black polyamide powder in sealed, moisture-resistant bags or drums. Ensure dry, ventilated storage away from ignition sources. Avoid static buildup and dust dispersion during transport and handling. Standard non-hazardous freight, though proper containment is required to prevent leaks. |
| Storage | Store in a cool, dry area away from direct sunlight, heat, and ignition sources. Keep the original container tightly sealed to prevent moisture absorption and contamination. Avoid dust accumulation and open flames; use appropriate ventilation. Ensure temperature remains moderate, typically below 25°C, to preserve powder quality and flow properties. |
| Shelf Life | Shelf life is typically 2 years from date of manufacture when stored unopened in original container, away from moisture and heat. |
Arkema Rilsan Fine Powders MC BLACK 820 MAC is a polyamide 11 (PA11) powder supplied as a black-pigmented, 100 wt% solids coating medium for fluidised-bed dipping, electrostatically assisted fluidised-bed, and electrostatic spray lines. Melting temperature as measured by ISO 11357-3 is 184–189 °C; density is 1.03–1.05 g/cm³ per ISO 1183-1. The powder does not require solvent dilution, and application mass is therefore controlled by dry-film thickness and part geometry rather than by solvent-borne formulation solids. Pre-drying in dehumidified air at 80 °C for 2–4 h is recommended when storage relative humidity exceeds 60%. Field data from production-scale fluidised-bed lines indicates that free flow and transfer efficiency degrade if moisture content rises above 0.3 wt%, producing spitting and uneven film build on edges. The following application scenarios are restricted to established downstream sector practice.
In automotive metal tubing coating, the powder is applied as a 100 wt% PA11 medium with no carrier fluid. The addition ratio on the line is commonly controlled by dry-film thickness rather than by let-down in a formulation: for brake and fuel tube bundles, target film thickness is 250–400 µm, corresponding to a powder consumption of 2.8–3.6 kg/m² on cylindrical substrates with outer diameters between 8 mm and 20 mm. Reclaimed powder from cyclonic recovery may be blended with virgin powder up to 20 wt% provided the blend is sieved below 150 µm and particle size distribution is retested per ISO 8130-1. Pre-treatment on production lines is typically zinc phosphate or nanoceramic conversion coating followed by deionised water rinse. The bundle is preheated in a continuous gas-fired oven to 300–320 °C, immersed in the fluidised bed for 3–8 s, then post-fused in a second zone at 200–220 °C for 2–4 min. Water quenching from 180 °C to below 50 °C within 20 s reduces quench embrittlement in thin-walled tube. Compliance screening typically includes ISO 9227:2017 neutral salt spray with no red rust after 1,000 h at 250 µm, adhesion testing per ASTM D3359-23 method B with a target classification of 5B, and thickness measurement per ISO 2177:2003. Terminal finished parts include zinc-phosphate-treated steel brake line bundles, fuel filler tubes, clutch line assemblies, and vapour management tubes. Process failure modes observed on manufacturing lines include edge sag at oven temperatures above 330 °C and inadequate fusion below 200 °C, producing pits that reduce salt spray resistance.
Dishwasher basket wire goods from mild steel or electrogalvanized wire are coated with MC BLACK 820 MAC as a 100 wt% powder composition. The application ratio for wire goods with diameters between 2 mm and 6 mm ranges from 2.8 kg/m² to 3.6 kg/m², producing a fused coating thickness of 250–400 µm with adequate cut-edge coverage. Reclaimed powder may be incorporated at up to 25 wt% if the fraction above 125 µm is removed by screening and the reclaimed material has not exceeded 80 °C in the recovery system. Continuous gas-fired oven preheat is set to 320–340 °C for zinc-electroplated wire, followed by fluidised-bed dipping for 5–10 s and post-cure at 205–215 °C for 2–5 min. Air quenching rather than water quenching is standard for wire goods to avoid thermal shock at weld junctions. Compliance under FDA 21 CFR 177.1500(b) is evaluated for nylon resins intended for repeat-use food-contact articles; EU Regulation 10/2011 requirements for overall migration are applied when the coated basket contacts dry or aqueous foods at room temperature. Resistance to alkaline dishwasher detergents is assessed by immersion in 1 wt% sodium metasilicate solution at 60 °C for 24 h with no blistering per ISO 4628-2. Terminal finished goods include dishwasher baskets, cutlery baskets, height-adjustable rack inserts, and washing machine drum lifters.
Cast-iron and ductile-iron valve bodies in municipal water and wastewater service are coated with the black PA11 powder at 100 wt% solids. Addition ratio is expressed as powder consumption per coated area: 3.0–4.5 kg/m² for film thicknesses from 350 µm to 500 µm. The higher mass per unit area compensates for irregular geometry, internal port surfaces, and flange edge retention. Preheat temperature for cast components is lower than for steel tubing because of thermal mass and graphite expansion: 290–310 °C measured at the substrate surface before immersion. Dip time in the fluidised bed is extended to 8–20 s to achieve full coverage in internal cavities. Post-fusion is performed at 200–215 °C for 5–10 min, followed by controlled air cooling over 15–30 min to prevent delamination from differential thermal contraction. Compliance testing includes ISO 2812-1:2017 for chemical resistance against 1 vol% sodium hypochlorite, ISO 2177:2003 for dry-film thickness, and ASTM D714-17 for blister rating after 1,000 h water immersion. Where potable water contact is specified, extraction testing under BS 6920-1 is used, and the exact grade must be confirmed against the current WRAS directory. Production bottlenecks include incomplete fusion on sharp valve seats; radii below 2 mm generate localized thinning and require post-coating holiday testing per ASTM D5162-21. Terminal parts include butterfly valve bodies, pump casings, sluice gate valves, actuator brackets, and backflow preventer housings.
Coating of tubular steel for street furniture and urban hardware requires the black PA11 powder to be deposited at 100 wt% solids with no liquid carrier. Target dry-film thickness is 300–450 µm, equating to 2.5–3.8 kg/m² on square and round tube profiles with wall thickness above 2 mm. Reclaim addition is limited to 25 wt% and must be blended with virgin powder before charging the fluidised bed; higher reclaim ratios reduce first-pass transfer efficiency in electrostatically assisted fluidised-bed equipment. The process sequence involves degreasing and shot blasting to Sa 2.5 per ISO 8501-1, preheating in an infrared or gas-fired oven to 310–330 °C, dip coating for 6–12 s, and post-fusing at 210–225 °C for 3–6 min. Cooling in still air to below 60 °C before handling is required to maintain impact resistance. Outdoor exposure is assessed under ISO 4892-2:2013 method A; black pigmentation minimises colour shift, but gloss loss is unavoidable and is classified per ISO 2813. Impact resistance after 2,000 h accelerated weathering is tested using ASTM D2794-19 at 1.5 J reverse impact. Specific colour-change values for this exact black grade after 3,000 h ISO 4892-2 method A are not unconditionally guaranteed; published data for this specific configuration is limited, and batch release testing against the current Arkema technical data sheet should be used to establish lot-specific limits. Terminal finished products include park benches, bus shelter frames, bicycle racks, litter bin housings, and stadium seat supports. A known field failure mode is chipping at cut ends if the tube end is not radiused and re-coated after cutting.
| Application segment | Substrate preheat | Dip/spray time | Post-fusion | Film thickness | Powder consumption |
|---|---|---|---|---|---|
| Automotive tube bundles | 300–320 °C | 3–8 s fluid bed | 200–220 °C for 2–4 min | 250–400 µm | 2.8–3.6 kg/m² |
| Dishwasher wire goods | 320–340 °C | 5–10 s fluid bed | 205–215 °C for 2–5 min | 250–400 µm | 2.8–3.6 kg/m² |
| Cast valve bodies | 290–310 °C | 8–20 s fluid bed | 200–215 °C for 5–10 min | 350–500 µm | 3.0–4.5 kg/m² |
| Street furniture tube | 310–330 °C | 6–12 s fluid bed | 210–225 °C for 3–6 min | 300–450 µm | 2.5–3.8 kg/m² |
| Marine deck fittings | 300–340 °C | 5–15 s fluid bed | 215–225 °C for 4–8 min | 250–500 µm | 2.4–3.5 kg/m² |
| Healthcare furniture | 300–320 °C | 60–80 kV spray or EB | 205–215 °C for 3–5 min | 200–350 µm | 2.0–3.0 kg/m² |
For marine deck fittings and coastal hardware, the powder is processed as a 100 wt% PA11 coating with a virgin-to-reclaim blend ratio of 80:20. Maximum reclaimed powder content is 20 wt% to prevent excessive fines build-up that reduces fluidisation uniformity and produces localised pinholes. Coating thickness for salt-fog service is specified at 250–500 µm; powder consumption ranges from 2.4 kg/m² to 3.5 kg/m² depending on part shape and edge count. Pretreatment uses zinc phosphate with a coating weight of 2.0–4.5 g/m² or blast cleaning to Sa 2.5 per ISO 8501-1. Parts are preheated to 300–340 °C, immersed in the fluidised bed for 5–15 s, post-fused at 215–225 °C for 4–8 min, and water quenched after cooling to 140–160 °C to reduce shrinkage stress. Corrosion testing is performed according to ISO 9227:2017 neutral salt spray for 1,000–2,000 h depending on film thickness, with acceptance criterion of no blistering greater than rating 2 per ISO 4628-2 and no creepage greater than 2 mm at scribe. Adhesion after salt fog is checked by ASTM D3359-23 method A; performance below class 4A requires process recalibration. The elimination of epoxy powder reduces the two-coat primer-topcoat sequence, but PA11 requires higher substrate preheat than epoxy formulations and cannot be applied to heat-sensitive cast aluminium. Terminal finished parts include marine deck hinges, cleats, light pole bases, handrail brackets, and seawater pump caps.
| Performance property | Test method | Typical condition | Acceptance criterion used in downstream QA |
|---|---|---|---|
| Corrosion resistance | ISO 9227:2017 | 1,000–2,000 h neutral salt spray | No red rust at coating thickness specified per segment |
| Adhesion after exposure | ASTM D3359-23 | Method B cross-cut or Method A tape | Class 5B or 4A minimum |
| Coating thickness | ISO 2177:2003 | Coulometric, magnetic or optical verification | Segment-specific range from 200 µm to 500 µm |
| Impact resistance | ASTM D2794-19 | 1.5 J reverse impact | No cracking visible under 10× magnification |
| Chemical resistance | ISO 2812-1:2017 | Alkaline cleaner or disinfectant immersion | No blistering or adhesion loss after 24 h |
| Weathering | ISO 4892-2:2013 | Method A filtered xenon-arc | No substrate corrosion at specified duration; gloss change recorded per ISO 2813 |
| Food-contact status | FDA 21 CFR 177.1500(b) | Repeat-use articles | Overall migration measured under EU Regulation 10/2011 |
Hospital furniture coating operations deposit the black PA11 powder as a 100 wt% coating on steel tube and sheet components with wall thicknesses from 1.5 mm to 3 mm. Recommended powder consumption is 2.0–3.0 kg/m², giving a fused film thickness of 200–350 µm. Reclaim addition is capped at 15 wt% because black colour consistency and low-gloss surface appearance are more sensitive to fine-particle oxidation during reclamation. Substrate preparation includes solvent wipe, grit blasting to Sa 2.5, and preheating to 300–320 °C. Electrostatic spray at 60–80 kV is used for lower-mass parts to reduce overspray; complex tubular frames are coated in an electrostatically assisted fluidised bed. Post-fusion is performed at 205–215 °C for 3–5 min, followed by forced air cooling. Chemical resistance to hospital-grade disinfectants is tested by immersion in 0.5 wt% quaternary ammonium solution at 45 °C for 24 h, with no change in appearance or adhesion per ISO 2812-1:2017. Biocompatibility for medical device surfaces is evaluated under ISO 10993-1:2018, and food-contact status is assessed under FDA 21 CFR 177.1500 if tray or water-contact components are within the same article. Terminal finished products include hospital bed frame tubes, wheelchair side guards, rehabilitation equipment handles, IV pole bases, and patient lift armrests.
Competitive Arkema Rilsan Fine Powders MC BLACK 820 MAC PA11 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Arkema Rilsan Fine Powders MC BLACK 820 MAC is a black-pigmented polyamide 11 (PA11) fine powder supplied for thermoplastic coating of metal components by fluidized-bed immersion or electrostatic spray. The PA11 backbone is synthesized from 11-aminoundecanoic acid obtained from castor oil. After polymerization, the resin is micronized, classified, and pigmented to produce a free-flowing powder with controlled particle-size distribution. The product code separates MC BLACK 820 MAC from natural and grey Rilsan fine powder grades. Publicly available summary literature does not provide exhaustive product-specific numerical specifications for this exact black grade; batch-level values are issued in the Arkema technical data sheet and certificate of analysis. The following sections use PA11 homopolymer values and published fine-powder class data for preliminary engineering selection.
Because the coating is thermoplastic rather than thermoset, film formation occurs by melting and coalescence above the crystallite melting range, not by chemical crosslinking. The black pigment contributes ultraviolet screening and opacity, but it may also alter electrostatic charge decay and powder resistivity. These changes are process-relevant in electrostatic spray lines because carbon black is not an electrically inert component. Material selection therefore requires simultaneous evaluation of film properties and application behaviour.
PA11 homopolymer used in Rilsan fine powders typically exhibits a density of 1.04 g/cm³ at 23°C when measured under ISO 1183-1. The melting range determined by differential scanning calorimetry per ISO 11357-3 is generally 183°C to 187°C. Equilibrium water absorption for PA11 under ISO 62 is approximately 1.8%, lower than PA6 and relevant for humid service conditions. Shore D hardness of unfilled PA11 film tested under ISO 868 is typically near 70. Tensile elongation at break for unfilled PA11 can exceed 200% under ISO 527-2; powder-deposited films may show lower elongation because of pigment effects, surface porosity, and process-induced crystallinity. The carbon black in MC BLACK 820 MAC screens ultraviolet radiation and slows photodegradation, but it may also reduce surface resistivity from the high values typical of natural PA11. The resulting charge-decay behaviour should be characterized before corona-gun settings are fixed, because low surface resistivity can limit film build on deep recesses. Published data for the exact carbon black loading and surface resistivity of this grade are limited; batch-specific documentation from Arkema should be consulted when electrostatic transfer efficiency is a critical control parameter.
Particle-size distribution controls fluidization and film smoothness. For medium-coarse fine powders used in fluidized-bed work, laser diffraction under ISO 13320 with dry dispersion frequently reports a median particle diameter in the 80 µm to 140 µm range, with top cut below 180 µm. Electrostatic-spray grades may use finer distributions, and the exact cut points for this black grade must be read from the technical data sheet. Melt-flow behaviour influences levelling and edge coverage; when tested under ISO 1133-1 at 235°C/2.16 kg, PA11 coating grades often fall between 10 g/10 min and 40 g/10 min. Pigment nucleation may shift this value, so the black grade should not be assumed identical to unpigmented PA11 of the same base resin.
Low-temperature impact resistance of PA11 is typically characterized by notched impact testing under ISO 179-1 or ASTM D256. Unfilled PA11 often retains ductile behaviour at -40°C, but the black pigment, fusion history, and coating porosity can shift the ductile-to-brittle transition. Abrasion resistance can be measured by ASTM D4060 using CS-17 wheels; published results depend on film thickness, substrate roughness, and primer. Corrosion resistance is evaluated by neutral salt spray under ISO 9227 on primed and scribed panels. PA11 powder systems on primed steel are commonly tested for 1,000 h to 2,000 h, but the specific creep width and blistering criteria are set by the final article specification. The exact salt-spray performance of this black grade should be verified with the selected primer.
| Property | Typical value | Test method |
|---|---|---|
| Density | 1.04 g/cm³ | ISO 1183-1 |
| Melting range | 183–187°C | ISO 11357-3 |
| Water absorption at saturation | ~1.8% | ISO 62 |
| Shore D hardness | ~70 | ISO 868 |
| Tensile elongation at break, unfilled PA11 | >200% | ISO 527-2 |
| Particle-size median, typical fluidized-bed fine powder | 80–140 µm | ISO 13320 |
Production-scale coating with MC BLACK 820 MAC begins with degreasing and abrasive blasting of steel substrates to Sa 2.5 as defined in ISO 8501-1. Many PA11 systems require an epoxy or phenolic primer for long-term salt-spray resistance; direct application to bare blast-cleaned steel may be acceptable only where adhesion requirements are modest and validated by the final application test. Substrate preheat temperature must exceed the PA11 melting range and is selected from the heat capacity of the workpiece and the target film thickness. Heavy steel sections act as heat sinks and require longer dwell in a forced-air or infrared preheat oven; thickness gradients across a production load can create film-thickness differences of several hundred micrometres. Published processing windows for PA11 fluidized-bed dipping commonly use substrate temperatures from 300°C to 400°C. Lower temperatures produce incomplete fusion and porosity, while higher temperatures may oxidize the powder or degrade the primer. Aluminium parts, with lower heat capacity and faster cooling, require lower preheat temperatures or shorter oven residence than steel parts of the same section thickness.
The powder is fluidized using compressed air with a pressure dew point below -40°C and a bed expansion of 20% to 40% against the porous membrane. Moisture uptake above 0.1% by weight reduces flow and changes tribocharging; powder should be pre-dried in a desiccant or vacuum dryer when ambient relative humidity exceeds 60%. Fluidized-bed tanks with porous polyethylene or sintered stainless-steel membranes, vibratory screens, and cyclone recovery are typical. Electrostatic spray can use corona or tribo guns. Because carbon black lowers powder resistivity, corona gun voltage often requires adjustment downward from the typical 40–100 kV range to avoid back-ionization and orange peel. Charge-to-mass ratio and powder resistivity should be checked with a Faraday pail according to IEC 61340-2-3 before production start-up. After deposition, the part enters a fusion oven and is held at 180°C to 200°C film temperature for 5 min to 10 min after substrate setpoint, followed by forced-air cooling. Cooling rate controls crystallinity: rapid cooling produces a more ductile film, while slow cooling raises hardness and modulus. Overheating above 240°C may cause yellowing and oxidative chain scission; inadequate fusion produces pinholes, low adhesion, and reduced salt-spray resistance.
Film-thickness targets for fluidized-bed PA11 are commonly 250 µm to 500 µm. Thickness below 150 µm may create pinhole-sensitive coatings, while thickness above 800 µm can increase internal stress and edge cracking. Dry-film thickness can be measured magnetically under ISO 2178 or ASTM D7091. Holiday detection under ASTM D5162 is used to identify pinholes on critical surfaces.
Reclaim operations introduce particle-size drift and fines accumulation. Cyclone recovery preferentially returns fine particles; successive passes increase specific surface area, moisture uptake, and powder clumping. A controlled virgin/reclaim ratio is required, and recovered powder should be sieved through a 125 µm or 150 µm screen before reintroduction. Published data for the optimum reclamation ratio for this specific black PA11 grade is limited; trials on the actual production line are necessary because transfer efficiency and film quality depend on gun type, booth airflow, and workpiece geometry.
The principal difference from PA12 powder grades emerges from the amide-group density of the polymer chain. PA11 contains one amide group per 11 carbon atoms, while PA12 contains one per 12. This produces a higher melting range and slightly higher water absorption in PA11, along with higher stiffness and surface hardness in many formulations. PA12 has lower density and lower water absorption and is often selected for lower-temperature flexibility and reduced moisture sensitivity. PA11 may offer better scratch and abrasion resistance in coated wire goods and higher resistance to stress cracking in some chemical environments, but the specific formulation and pigment must be considered. Compared with fusion-bonded epoxy, MC BLACK 820 MAC is a thermoplastic coating with reversible melt behaviour, higher elongation, lower hardness, and the ability to be reworked by reheating. Fusion-bonded epoxy is a thermoset that can adhere directly to blast-cleaned steel and is widely used for pipeline exteriors; its lower elongation makes it more brittle under impact and bending. PA11 fine powder coatings typically require a primer for active corrosion protection on steel, whereas epoxy may not.
| Property | PA11 typical | PA12 typical | Fusion-bonded epoxy typical | Test method |
|---|---|---|---|---|
| Melting or cure range | 183–187°C | 172–178°C | 150–230°C cure | ISO 11357 |
| Density | 1.04 g/cm³ | 1.01 g/cm³ | 1.4–1.6 g/cm³ | ISO 1183 |
| Water absorption at saturation | ~1.8% | ~1.1% | <0.5% | ISO 62 |
| Elongation at break | >200% unfilled | >150% unfilled | 1–5% | ISO 527-2 |
| Shore D hardness | ~70 | ~65 | ~80 | ISO 868 |
Within the Rilsan Fine Powders range, natural grades lack carbon black and may display high surface resistivity and lighter colour. Grey grades contain mixed pigments for intermediate colour and weathering behaviour. The black 820 grade is selected when deep black colour, opacity, and ultraviolet screening are required. The pigment also changes electrostatic deposition behaviour relative to natural PA11, so transfer parameters cannot be copied between grades without verification.
Continuous dry-heat exposure of PA11 is usually limited to service temperatures below 100°C; short-term excursions may reach 120°C, but property retention must be validated by heat aging under ISO 6022 or equivalent. The black pigment can raise surface temperature under direct sunlight, which may reduce lifetime under mechanical load. PA11 is resistant to many oils, fuels, aliphatic hydrocarbons, salt solutions, and alkaline cleaning agents, but it is sensitive to strong mineral acids, concentrated formic acid, phenols, and oxidizing agents. Hydrolysis accelerates above 80°C in acidic aqueous conditions. The powder should not be processed or used in contact with concentrated hydrogen peroxide or hot sodium hypochlorite solutions because the amide backbone can degrade. If the coated article must be cleaned with oxidizing disinfectants, compatibility should be tested on the finished part.
Regulatory positioning of MC BLACK 820 MAC should be confirmed through the Safety Data Sheet and technical data sheet. Polyamide 11 homopolymer may be evaluated for food-contact use under FDA 21 CFR 177.1500 or European food-contact measures, but carbon black purity and any processing aids must also be controlled. Restricted substances under RoHS 2011/65/EU are normally addressed for this powder class, with lead, mercury, hexavalent chromium, and cadmium limits at 0.1% by weight in homogeneous material and cadmium at 0.01%. REACH SVHC compliance is the responsibility of the converter and should be based on the current candidate list. Emission of volatile compounds during fusion is low for the PA11 powder itself, but primers may contribute solvents and should be assessed separately.
Black PA11 fine powder grades are specified for dishwasher baskets, automotive underhood clips, outdoor furniture arms, water-treatment valves, and medical equipment rails where a combination of impact resistance, abrasion resistance, and corrosion protection is required. Potable-water contact requires additional evaluation under NSF/ANSI 61 or the applicable national standard. Long-term exposure tests should use the exact black grade and primer on the intended substrate because adhesion and salt-spray performance depend on surface preparation and primer system. Published field data for this specific black configuration are limited; the converter should therefore generate performance data for the complete coated article rather than extrapolate from natural PA11 or unprimed laboratory specimens.
