| HS Code | 249994 |
| Product Name | Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11 |
| Polymer Type | Polyamide 11 (PA11) |
| Color | Black |
| Particle Size D50 | 80 microns |
| Bulk Density | 0.50 g/cm3 |
| True Density | 1.04 g/cm3 |
| Melting Point | 186 °C |
| Glass Transition Temperature | 42 °C |
| Water Absorption At Saturation | 1.2 % |
| Tensile Strength | 40 MPa |
| Elongation At Break | 300 % |
| Shore D Hardness | 70 |
As an accredited Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg multi-layer paper bags, Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11 is a fine black PA11 powder for durable industrial coatings. |
| Container Loading (20′ FCL) | Load 20′ FCL with Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11, ensuring dry, ventilated, secure packaging to prevent damage and contamination. |
| Shipping | Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11 is a black polyamide 11 powder supplied in sealed bags or drums. Ship as non-hazardous dry powder, protected from moisture, heat, and direct sunlight. Keep upright, avoid dust accumulation, and label as polymer powder for industrial coating use. |
| Storage | Store Rilsan Fine Powders ES BLACK 710 MAC PA11 in a cool, dry, well-ventilated area, away from heat, sparks, and direct sunlight. Keep the original container tightly sealed to prevent moisture absorption and contamination. Maintain moderate temperatures and avoid stacking heavy objects. Use within the recommended shelf life, typically two years from manufacture if unopened. |
| Shelf Life | Shelf life is typically 2 years when stored in original sealed packaging in a cool, dry environment. |
Rilsan Fine Powders ES BLACK 710 MAC PA11 is a black-pigmented electrostatic coating powder derived from polyamide 11. The material is applied as a single-component 100% solids formulation; no solvent, plasticizer, or curative is added. The standard addition ratio for the charge consists of 100 wt% virgin powder, or a dry blend of 70–80 wt% virgin powder with 20–30 wt% screened reclaimed overspray, provided the reclaim passes a 125 µm sieve and moisture content remains below 0.4 %. The powder is typically sieved to a median particle size near 100 µm to maintain electrostatic transfer and edge coverage on welded wire intersections. Production lines commonly maintain coating thickness at 250–400 µm over welded wire dishwasher baskets. The softening point of the base PA11 resin is approximately 186 °C, and continuous operating temperature of the coated article is limited to 90 °C; sustained exposure to heating elements or direct steam injection above 120 °C is outside the validated service envelope. The charge must be kept free from epoxy, polyester, and PVC powder contamination because mixed powder residues generate intercoat adhesion failure; PA11 does not co-react with thermoset chemistries.
Industry compliance for dishwasher basket coatings includes FDA 21 CFR 177.1500 for nylon resins intended for repeated food contact, EU Regulation 10/2011 for plastic materials and articles intended to come into contact with food, and detergent exposure protocols derived from IEC 60436 procedures for mechanical dishwashing. The downstream production process typically begins with mild steel wire products that are alkaline-degreased, rinsed, and shot-blasted to Sa 2½ surface preparation. The ware is preheated to 250–350 °C in a convection oven, then coated by electrostatic spray at 40–80 kV or by fluidized bed immersion at 250–300 °C substrate temperature. After deposition, the basket is placed in a cure oven at 240 °C for 10 min metal residence time, followed by forced-air cooling. Terminal finished product types include dishwasher baskets, cutlery baskets, cutlery trays, drying racks, and wire shelves used in household and institutional dishwashers.
On cold-rolled steel wire and stamped seat components, the PA11 powder is applied at film thicknesses of 200–350 µm to suppress metal-to-metal noise, damp spring resonance, and prevent corrosion of zinc-phosphated surfaces. The feed mix for this application is a single-component 100% solids powder; recovered overspray is added at not more than 30 wt% of total charge after sieving through 125 µm mesh. The powder is not diluted with pigment masterbatch, and adhesion is achieved without a primer when the substrate is preheated to 230–260 °C. Zinc phosphate conversion coating weight is maintained at 1.5–3.0 g/m² to limit phosphate sludge build-up in oven ingress zones. Because the powder is thermoplastic rather than thermosetting, the coating melts and flows without crosslinking; viscosity during film formation is controlled by metal temperature and oven residence time, not by catalyst ratio. Oven temperature variation beyond ±5 °C around the set point produces visible gloss drift and edge flow irregularities on stamped brackets.
Compliance testing for automotive wire and spring hardware generally follows ISO 9227:2017 NSS for neutral salt spray resistance on zinc-phosphated steel, ASTM D2794 for rapid deformation impact, VDA 621-415 for cyclic climate exposure, and ASTM D3359 Method B for cross-cut adhesion. The production line is typically a multi-station immersion or electrostatic spray booth with reciprocating guns; the parts are hung on tooling with defined rack density to avoid Faraday cage defects at wire intersections and spring coil overlaps. After coating, parts are cured in a convection oven at 230–250 °C for 10–15 min metal residence time, depending on section thickness. Finished parts include seat spring assemblies, seat belt anchors, headrest rods, window regulator rails, handbrake cable guides, and seat recliner brackets.
For galvanized steel and aluminium streetscape components within 500 m of coastal chloride exposure, the PA11 fine powder is applied as a single-coat 100% solids black finish at 300–450 µm thickness. The formulation addition ratio on production lines is typically 100 parts virgin powder to 20 parts screened reclaimed powder by mass, with no separate curing agent or catalyst; the reclaim is limited to 20 wt% of the total charge because recycled powder can carry residual moisture and fine particulate that alters electrostatic transfer efficiency. A lower reclaim ceiling is used on aluminium substrates where phosphate conversion coatings are replaced by chrome-free zirconium/titanium passivation layers and the electrostatic deposition window is narrower. The black pigmentation of the 710 grade provides ultraviolet screening within the coating layer, but gloss retention values vary with beachfront salt accumulation and should be measured using ISO 2813 at 60° geometry.
The main compliance anchors are ISO 9227:2017 for neutral salt spray performance on metallic substrates, ISO 4624 for pull-off adhesion of the fused PA11 layer, ISO 16474-2 for accelerated weathering in xenon-arc ageing, and ASTM D2244 for instrumental colour difference after weathering. The downstream process consists of degreasing, grit blasting or conversion coating, preheating to 250–350 °C, electrostatic application from reciprocating multi-gun booths at 50–90 kV, and curing at 240 °C for 10 min after the metal reaches temperature. Terminal product types in this segment include park benches, litter bins, bike racks, lamp posts, handrails, and bus shelter frames.
Hospital bed frames and mobile trolley rails are exposed to repeated disinfection with quaternary ammonium compounds, iodophors, and alcohol-based cleaners; PVC plastisol softens under alcohol contact, while epoxy-polyester hybrids show visible gloss reduction and microcracking after repeated wipe cycles. The PA11 electrostatic powder is applied as a 100% solids thermoplastic coating at 250–400 µm dry film thickness; the formulation uses 70–75 wt% virgin powder and 25–30 wt% screened reclaim for black metal furniture, with the reclaim conditioned at 80 °C for 2 h when ambient relative humidity exceeds 60%. No external levelling agent or curative is added. The powder must not be blended with conductive carbon-filled powders or epoxy residues, as cross-contamination creates pinhole pathways and weak boundary layers on stainless steel sections. Published data for long-term repeated skin contact with this exact black grade is limited; the coating is specified as a durable equipment finish, not as an implant or wound-contact surface.
Compliance considerations for this segment include ISO 10993-5 cytotoxicity evaluation when the coating is specified for skin-contact surfaces on patient handling equipment, ISO 10993-10 for sensitization and irritation testing, and chemical cleaner resistance testing based on exposure to 2% sodium hypochlorite and 70% isopropanol. The production line for tubular steel frames uses alkaline degreasing, shot blasting, stainless steel passivation where required, electrostatic spray deposition at 40–80 kV, and oven curing at 230–250 °C for 10–15 min. Finished products include hospital bed frames, IV stand bases, instrument cart handles, patient lift bars, and dialysis machine support rails.
Copper busbar sections and terminal connectors require a thermoplastic insulation layer that combines dielectric integrity with flexibility after repeated thermal cycling. The black PA11 electrostatic powder is applied at 300–500 µm thickness on degreased and conversion-coated copper; the feed ratio is 100% solids powder, and screened reclaim is limited to 20 wt% of total charge to minimise the inclusion of conductive dust or metal fines that can create pinhole defects. Edge coverage on rectangular busbar profiles is controlled by preheating to 250–300 °C, using low-velocity electrostatic guns at 40–60 kV, and applying two passes in mutually perpendicular directions. Because the powder is thermoplastic, film defects can be repaired by local heating and reflow without solvent stripping. Mixing with conductive carbon-filled powders is prohibited because film dielectric strength collapses even at low addition levels. Published data for this exact black grade on large cross-section copper busbars above 500 µm is limited; each busbar geometry requires pinhole test validation before full-rate release.
Compliance is anchored to IEC 60664-1 for insulation coordination, IEC 60243-1 for electric strength of insulating materials, UL 94 HB for flammability classification, and ASTM D149 for dielectric breakdown voltage at commercial thicknesses. The production process includes alkaline cleaning, conversion coating on copper and aluminium, forced hot-air drying, preheating, electrostatic spray or fluidized bed application, cure at 230–250 °C for 10–15 min, and a post-cure spark test at 3–5 kV to identify pinholes. Terminal product types include busbars, terminal blocks, high-voltage switchgear components, battery interconnects, and electric vehicle busbar insulation covers.
In high-abrasion retail logistics environments, trolley baskets and display racks fabricated from mild steel wire are coated with the PA11 powder at 300–450 µm thickness to resist impact from product loading, wet spillage, and cart retrieval abuse. The charge is a single-component 100% solids black powder; recovered overspray is incorporated at up to 20 wt% of total feed after magnetic separation and sieving through 125 µm mesh, because ferrous contamination from basket handling can produce micro-pinholes and compromise salt spray resistance. Film thickness below 250 µm on weld seams is a documented failure mode in basket abuse testing, while applied thickness above 450 µm increases edge chipping on wire ends. The powder requires no primer, but zinc phosphate conversion treatment is standard for wire substrates to maintain adhesion on edges and weld zones.
Relevant compliance frameworks include REACH Annex XVII for restricted substances, RoHS 2011/65/EU for electrical and electronic retail equipment where applicable, and mechanical testing based on ASTM D2794 for impact resistance and ISO 1519 for mandrel bend cracking around wire geometries. The downstream process begins with alkaline degreasing and phosphating, followed by preheating at 250–350 °C, electrostatic spray application at 50–80 kV, cure at 240 °C for 10 min, and forced-air cooling. Terminal finished product types include supermarket trolley baskets, hand baskets, point-of-sale display racks, cold-store shelving, and retail storage bins.
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Arkema Rilsan Fine Powders ES BLACK 710 MAC PA11 is supplied as a black-pigmented polyamide 11 powder for electrostatic deposition onto ferrous and aluminum substrates. The ES prefix identifies an electrostatic spray-grade fine powder; the BLACK 710 designation specifies a carbon-black-loaded system with controlled tint strength and lot-to-lot colour tolerance. The MAC suffix is commonly interpreted as a modified adhesion chemistry intended to improve intercoat adhesion and edge coverage, although published formulation detail for the exact additive package is limited and the current Arkema technical data sheet should be consulted. The polyamide 11 base resin has a density of 1.03–1.05 g/cm³ when measured under ISO 1183-1 and a melting endotherm peak between 186 °C and 189 °C when determined by differential scanning calorimetry under ISO 11357-3. Published particle-size data for this specific MAC variant is limited; electrostatic spray grades in the Rilsan Fine Powders family are conventionally handled as sub-100 µm powders with a Dv50 in the 40–80 µm band by laser diffraction per ISO 13320.
Electrostatic spray deposition of ES BLACK 710 MAC is typically performed with corona charging equipment operated at 60–90 kV negative polarity, though exact settings must be matched to part geometry and booth airflow. Fine powder fractions in the 40–80 µm Dv50 band generate higher charge-to-mass ratios than coarse fluidized-bed grades; this improves wrap around edges but also increases the risk of back-ionization on flat surfaces. Delivery air pressure in production lines frequently falls between 1.0 bar and 1.5 bar, with powder output adjusted to avoid impact fusion in the pump. The product is applied to clean metal at ambient temperature and then oven-cured, or to preheated parts where the powder fuses immediately on contact. Unlike fluidized-bed grades, ES powders are not used for thick dip coatings; they are designed for electrostatic cloud deposition at dry-film thickness values generally below 500 µm. Transfer efficiency in recessed geometries should be verified on the actual line using gravimetric measurements or radiographic thickness mapping per ISO 2178 or ASTM D7091-13, because published data for the specific transfer efficiency of this grade in Faraday cage conditions is limited.
After alkaline degreasing and blast cleaning to a surface profile of 50–75 µm Rz, the substrate is optionally phosphated or primed before powder application. The dry-film thickness for corrosion service is typically maintained between 150 µm and 500 µm. At less than 150 µm, pinhole density increases under ISO 2812-1 immersion testing, while thickness beyond 500 µm can generate cohesive stress at the interface during cooling. On production lines, film thickness is measured with a magnetic induction gauge calibrated to ISO 2178; for aluminum substrates, eddy-current measurement per ISO 2360 is used. The MAC chemistry is specifically relevant where mechanical adhesion to overmolding or multi-layer coating systems is required, but surface activation and intercoat adhesion should still be confirmed by cross-cut testing under ISO 2409.
The PA11 carrier exhibits a semicrystalline morphology with a crystallization temperature of approximately 145–155 °C during cooling at 10 K/min by ISO 11357-3. This crystallization window is narrower than that of PA6 and slightly higher than that of PA12, which influences edge stress and film leveling. Films formed from PA11 exhibit tensile elongation at break exceeding 200 % when tested as free films per ISO 527-3; the same test method on unmodified PA6 films often returns values below 50 %. The softening point of PA11 is near 180 °C, permitting continuous service at 90–120 °C depending on mechanical load and chemical environment. In powder-coating ovens, substrate temperature should be held between 220 °C and 250 °C for 10–20 min to sinter the film; higher temperatures may cause discoloration of the black layer, while lower temperatures produce incomplete coalescence and low gloss. Carbon black increases melt viscosity slightly relative to natural PA11, so oven dwell should be checked when transferring from natural to black grades and adjusted upward only if the part mass and air convection do not already provide sufficient heat.
| Parameter | Test method | Representative PA11 coating film |
|---|---|---|
| Density | ISO 1183-1 | 1.03–1.05 g/cm³ |
| Melting endotherm peak | ISO 11357-3 | 186–189 °C |
| Water absorption at saturation | ISO 62 | 1.6–1.9 % |
| Tensile elongation at break | ISO 527-3 | Greater than 200 % |
| Falling-weight impact | ISO 6272-2 | Typically ≥5 J at 23 °C |
| Pencil hardness | ASTM D3363 | H–2H |
Moisture control remains a processing boundary because the black-pigmented powder absorbs infrared energy faster than natural PA11. Before spraying, powders stored above 60 % RH should be dried at 80 °C for 4 h to avoid steam pinholes. Saturated water uptake of PA11 is approximately 1.6–1.9 %, which is significantly lower than PA6 at 9–10 % but slightly higher than PA12 at 1.4–1.6 %. This water uptake difference means ES BLACK 710 MAC retains dimensional stability better than PA6 coatings in humid service, but PA12 may be selected for continuous demineralized-water immersion if water absorption is the primary design criterion.
Above 500 µm dry-film thickness, residual stress generated during cooling can exceed the adhesive strength of the blast profile at sharp edges. The black pigmentation increases radiative absorption, so thick films on thin-gauge steel may reach cure temperature earlier than the substrate; this creates a transient under-sintered interface. Multi-pass deposition can be used, but each pass must be heated sufficiently to remelt the previous layer without causing oxidative yellowing of the underlying polymer. Dielectric strength per unit thickness measured by ASTM D149-20 may decline in films above 500 µm because entrapped air and pigment agglomerates reduce the effective continuous polymer path. In chloride immersion, thick single-pass films often show blistering at scribe lines after 2000 h under ISO 9227 if the interface is not cleaned properly; published data for this specific grade under multi-pass application is limited. For this reason, total film builds in excess of 500 µm are typically achieved only when the substrate has sufficient thermal mass and when intermediate adhesion checks are performed after each pass.
Production lines using reciprocating spray booths or multigun systems observe batch-to-batch shifts in electrostatic transfer efficiency when the particle-size Dv50 moves by ±10 µm. Fine fractions below 20 µm may agglomerate in humid feed hoppers and cause spitting from the gun. The material is not intended for injection molding or extrusion; its melt viscosity and additive package are formulated for atmospheric fusion on metal, not for high-shear melt processing. Any attempt to reprocess overspray through a twin-screw extruder with a length-to-diameter ratio greater than 30:1 should be evaluated separately using a melt filtration test because the powder may contain gel particles and pigment agglomerates. The MAC chemistry further distinguishes this product from general-purpose PA11 coating powders because it may alter the surface free energy of the fused film, which can affect both overspray adhesion and the interaction with subsequent adhesive layers.
PA11 coatings resist aliphatic hydrocarbons, diesel, hydraulic fluids, and salt solutions under ISO 2812-1 immersion. They are not recommended for concentrated sulfuric acid, boiling glycols, or polar solvents such as cresol and formic acid. The PA11 film is less crosslinked than fusion-bonded epoxy; it can stress-crack under constant load in the presence of strong acids and may soften above its glass transition when exposed to some plasticizing solvents. Relative to epoxy powders, PA11 provides higher impact and abrasion resistance but lower barrier performance under continuous hot-water immersion. Relative to polyester powders, PA11 generally has better low-temperature impact and chemical resistance against alkaline cleaners, but lower UV gloss retention when unpigmented; the carbon black in ES BLACK 710 MAC increases UV screening at the surface, though chalking may still occur after prolonged weathering.
| Material system | Density g/cm³ | Melting point or cure range °C | Water saturation % | Low-temperature impact | Barrier resistance in hot water |
|---|---|---|---|---|---|
| PA11 fine powder | 1.03–1.05 | 186–189 | 1.6–1.9 | High | Medium |
| PA12 fine powder | 1.01–1.03 | 174–177 | 1.4–1.6 | High | Medium-high |
| PA6 fine powder | 1.12–1.14 | 220–225 | 9–10 | Low unless modified | Low |
| Fusion-bonded epoxy | 1.2–1.5 | Cure 180–220 | 0.5–2.0 | Low-moderate | High |
Storage conditions for ES BLACK 710 MAC should be kept between 15 °C and 25 °C at 40–60 % RH. Exposure to direct sunlight or temperatures above 30 °C for prolonged periods can reduce electrostatic charge acceptance because the powder may absorb moisture or undergo pigment migration. Contamination with epoxy or polyester powder remnants in the booth should be avoided; mixed thermoplastic/thermoset deposits exhibit cratering, intercoat adhesion failure, and variable gloss under ISO 2409 cross-cut testing. For parts requiring chemical adhesion to rubber or polyurethane overmolding after coating, the MAC chemistry may be specified, but surface activation and adhesive compatibility should be verified by peel testing under ISO 813 or ASTM D429-14 because the black pigmented surface can retain low-molecular-weight species that reduce bond strength.
