| HS Code | 892659 |
| Material | Polyamide 11 (PA11) |
| Color | Grey |
| Density | 1.02 g/cm³ |
| Melting Point | 186 °C |
| Average Particle Size | 50 µm |
| Bulk Density | 0.55 g/cm³ |
| Tensile Strength At Break | 56 MPa |
| Elongation At Break | 300 % |
| Shore D Hardness | 70 |
| Water Absorption At Saturation | 1.1 % |
| Charpy Notched Impact Strength | 20 kJ/m² |
As an accredited Arkema Rilsan Fine Powders T GREY 7017 BHV RX PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg sealed bags of grey PA11 fine powder, moisture-protected for safe handling and industrial coating applications. |
| Container Loading (20′ FCL) | Loading 20′ FCL of Arkema Rilsan PA11 fine grey powder: bagged, palletized, secured, ventilated, protected from moisture, for safe transport. |
| Shipping | Arkema Rilsan Fine Powders T GREY 7017 BHV RX PA11 ships as a non-hazardous polyamide powder in sealed, moisture-proof bags or drums. Keep dry and away from ignition sources. Avoid dust generation; ground containers during transfer. Standard freight is suitable, but protect from extreme heat and humidity to preserve flow and coating properties. |
| Storage | Store in original, unopened containers in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep tightly sealed to prevent moisture absorption, which can affect powder flow and coating quality. Avoid dust accumulation and handle with proper PPE to prevent inhalation or skin contact. |
| Shelf Life | Shelf life is typically 2 years from production date when stored in original, unopened packaging in a cool, dry place. |
Rilsan Fine Powders T Grey 7017 BHV RX PA11 is deposited at field joint coating stations as a single-component polymeric barrier, with the charge maintained at 100 parts by mass of virgin powder and recovered cyclone overspray limited to ≤15 parts per 100 parts virgin after screening through a 150 µm vibratory sieve. The compliance envelope for offshore riser field joints is controlled by ISO 21809-3:2016 for field joint coatings and NORSOK M-501 for surface preparation and protective coating, with cathodic disbondment evaluated under ASTM G8 at −1.5 V versus saturated calomel electrode. In the downstream process, a pre-cut pipe end is induction-heated to 270–290 °C and the joint is immersed in a fluidized bed with porous-plate air distribution at 0.5–1.0 bar and 5–8 s immersion time, followed by post-fusion in an air oven at 190–200 °C for 5 min to produce a dry film thickness of 350–450 µm. Production-scale failure modes include preheat overshoot beyond 290 °C, which causes micro-foaming and reduces pull-off adhesion below the NORSOK M-501 minimum, and fluidization channeling, which creates low-thickness areas at the field joint bevel. Published data for this specific grey grade under full-scale offshore qualification is limited; the processing envelope is therefore aligned with Arkema Rilsan Fine Powders PA11 coating guidance and verified by batch adhesion testing on production joints. Finished terminal components include riser field joints, flowline spools, valved tie-in weldments, and clad pipe cutback zones where the PA11 layer functions as the external corrosion barrier in splash-zone and submerged service.
On continuous coil coating lines for zinc-nickel plated steel brake tube, Rilsan Fine Powders T Grey 7017 BHV RX PA11 is applied undiluted at 100 wt% with cyclone-recovered overspray metered back at 8–12 wt% of total feed, provided the reclaimed fraction is screened at 125 µm and dry-blended off-line for 10 min in a tumble mixer to prevent selective particle size drift. The compliance envelope for automotive fluid-line corrosion service includes SAE J2334 cyclic corrosion exposure and ISO 9227:2022 neutral salt spray, with coating adhesion measured by ISO 4624:2022 on tubular substrates and impact resistance by ASTM D2794. The downstream production route involves a gas-fired convection preheat tunnel holding the coil at 240–260 °C, a short fluidized-bed immersion of 3–6 s, and forced-air cooling to ≤60 °C before recoiling; the target dry film thickness is 150–220 µm on the OD and 80–120 µm at the outer radius of bends. Failure modes observed on production lines include edge pull-back at tube ends when preheat variation exceeds ±5 °C and white blush at the coating-substrate interface when surface moisture is not removed before preheat. The terminal product family includes brake line bundles, fuel filler neck tubes, transmission cooler lines, and clutch conduit assemblies where long-term chemical resistance and low moisture uptake are required over 100,000 km vehicle durability cycling.
The edge coverage limit on welded steel wire dishwasher racks is governed by preheat uniformity and powder particle residence time at the wire intersections, not by the bulk melt-flow ratio of Rilsan Fine Powders T Grey 7017 BHV RX PA11. The charge is used at 100 parts by mass of virgin powder; reclaimed fluidized-bed material is reintroduced at ≤20 parts per 100 parts virgin after 125 µm screening, with no plasticizer, curative, or solvent addition. Compliance for food-contact wire goods is assessed under FDA 21 CFR 177.1500 for polyamide 11 resin and NSF/ANSI 51 for food equipment materials, while end-use electrical safety is evaluated to EN 60335-1 and migration to EU 10/2011. The production sequence for dishwasher racks comprises alkaline degreasing, shot blasting to Sa 2½ per ISO 8501-1, preheating in a convection oven to 220–250 °C, immersion in the fluidized bed for 4–8 s, air cooling, and oven post-cure at 180–190 °C for 5 min to complete coalescence; target film thickness is 250–350 µm over wire OD and 150–200 µm at welded intersections. Alkaline rinse aid exposure at 65 °C is the controlling chemical condition, and production validation uses ASTM D1308-20 immersion in 0.1 N NaOH to detect loss of gloss or delamination. Terminal products include dishwasher baskets, wire shelving, refrigerator rack subassemblies, and commercial kitchen trolley grids where coating integrity must survive 2,000–3,000 wash cycles without exposed steel.
When a low-absorption polyamide 11 coating replaces epoxy powder on formed copper busbars, Rilsan Fine Powders T Grey 7017 BHV RX PA11 is charged at 100 parts by mass virgin powder without conductive filler, and reclaimed powder is excluded from high-voltage barrier work to avoid pinhole generation from oscillating particle-size segregation. The electrical insulation compliance baseline is IEC 60664-1:2020 for insulation coordination, with dielectric strength measured according to ASTM D149-20 and holiday detection performed according to ASTM D5162 at 1 kV per 0.1 mm of coating thickness. The downstream process involves corona-charged electrostatic spray onto preheated copper busbar segments at 200–230 °C, followed by batch oven cure at 190 °C for 10 min; the specified insulating layer is 250–400 µm after a single application. Production experience indicates that the preheat temperature above 230 °C leads to edge flow and localized thinning at corners below 150 µm, while temperature below 200 °C produces insufficient charge relaxation and orange peel. The acceptable continuous operating temperature for this polyamide 11 grade in electrical service is bounded by long-term thermal aging limits, and the material is not specified for applications requiring UL 94 V-0 without additional flame-retardant qualification. Terminal components include formed copper busbars, terminal posts, battery interconnects in static energy storage cabinets, and bus duct sections where the PA11 layer serves as a dielectric barrier rather than a structural insulator.
For methanol-service isolation valve bodies, a non-cathodic powder liner based on Rilsan Fine Powders T Grey 7017 BHV RX PA11 is deposited as a single-layer diffusion barrier with a thickness of 450–600 µm, using 100 parts by mass virgin powder and no reclaimed material because contamination from metallic wear debris can reduce chemical resistance. Chemical compatibility is evaluated under ASTM D543-20 and ISO 2812-1:2017, while the substrate preparation profile is controlled to Ra 4–6 µm according to ISO 8503-2. The downstream process consists of gas-fired oven preheating of the valve body to 300–320 °C, fluidized-bed dip coating for 8–12 s, and slow air cooling to 120 °C before demolding or fixture removal; final fusion is completed off-line at 190 °C for 10 min. Operational boundaries include storage of the powder at <30 °C and conditioning in sealed containers for 24 h when relative humidity exceeds 60%, because moisture uptake in warm hoppers causes fluidization surging and pinhole clusters along the valve seat flange. Amine-based liquid adhesion promoters are not dry-blended into this powder grade for chemical immersion service, as they can induce electrostatic charge decay and blocking in the fluidized bed. Terminal product types include methanol and ethanol service isolation valves, flow-meter bodies, small-bore chemical drain valves, and pump casings in non-oxidizing organic liquid service; strong mineral acids above 40 °C are excluded unless validated by immersion testing under field-representative pressure cycling.
When chloride pitting on cast pump housings has removed more than 0.3 mm of substrate, a single-pass Rilsan Fine Powders T Grey 7017 BHV RX PA11 layer is insufficient to restore dimensional tolerance without sub-film voids; a two-pass deposition sequence is therefore used. The first pass is applied at 100 parts by mass virgin powder, with up to 10 parts per 100 parts virgin screened reclaim through a 125 µm sieve, and the second pass is applied at 100 parts by mass virgin powder to maintain surface gloss and pinhole resistance. The corrosion and abrasion acceptance envelope refers to ISO 9227:2022 neutral salt spray, ASTM D4060-19 Taber abrasion with CS-17 wheels at 1 kg load, and ISO 868 Shore D hardness measurement. The downstream route begins with degreasing and grit blasting of cast iron to Sa 2½ per ISO 8501-1, followed by first preheat to 260–280 °C, fluidized-bed immersion for 4–6 s, flash cooling to 150 °C, second preheat to 240–260 °C, second immersion for 3–5 s, and final fusion at 190 °C for 8 min; total dry film thickness is controlled at 500–700 µm. On production castings, graphitic corrosion must be removed by machining before coating because residual graphite lowers interfacial adhesion and creates holiday detector faults under ASTM D5162. Terminal products include chemical service pump housings, valve bodies for neutral brine, and water-treatment volute casings where dimensional recovery and a smooth hydraulic surface are required. Published data for this specific configuration is limited; cavitation erosion zones with vapor bubble collapse are excluded from this material recommendation.
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Arkema Rilsan Fine Powders T GREY 7017 BHV RX PA11 is a polyamide 11-based powder coating grade engineered for protective and functional finishes on metallic substrates. The base resin is synthesized from 11-aminoundecanoic acid obtained via castor oil chemistry, producing a semi-crystalline polymer with an eleven-carbon backbone between amide linkages. This structure yields a density typically in the range of 1.03 g/cm³ to 1.05 g/cm³ at 23°C per ISO 1183-1, a melting endotherm peak between 184°C and 190°C per ISO 11357-3, and water uptake at saturation below 2.0 wt% under ISO 62. The fine powder presentation is intended for electrostatic spray and fluidized bed dipping processes, where particle size distribution, surface treatment, and the additive package determine transfer efficiency, film build uniformity, and resistance to moisture uptake before fusion. The BHV RX designation indicates a specific formulation revision involving charge-control additives and free-flow stabilizers; published data for the exact particle size distribution and melt flow rate of this grey 7017 variant is limited in the current technical datasheet, requiring application-specific validation prior to high-volume production.
Melt compounding of the PA11 base resin with pigments and stabilizers typically occurs on a twin-screw extruder with an L/D ratio of 32:1 to 44:1, followed by cryogenic grinding and air classification to the fine powder state. The grey 7017 pigmentation is obtained through controlled masterbatch addition; the presence of titanium dioxide and carbon black is expected from the grey tone, but the precise pigment loading is proprietary. Pigment particles in the size range of 0.2 µm to 1.0 µm can act as heterogeneous nucleation sites, shifting the non-isothermal crystallization peak toward higher temperatures and altering the fusion behaviour during oven preheating relative to unpigmented PA11.
The differentiation between PA11 and PA12 powder coatings originates from the number of methylene units between amide groups and the resulting hydrogen-bonding density. PA11 contains eleven carbon atoms per repeating unit; PA12 contains twelve. This structural difference lowers the PA12 melting peak to approximately 175°C to 180°C and reduces its tensile modulus relative to PA11. For protective coatings on steel, PA11 typically offers higher hardness and abrasion resistance than PA12, while both materials exhibit substantially lower moisture absorption than PA6, which can reach 9.5 wt% at saturation. The lower water uptake of PA11 stabilizes dielectric and dimensional properties in humid service environments. In comparison with PA12, PA11 has a slightly higher continuous service temperature, although the difference is often operationally significant only above 110°C. Stress cracking resistance in salt solutions is comparable, with specific additive packages shifting the performance envelope.
| Property | PA11 (typical) | PA12 (typical) | PA6 (typical) | Test method |
|---|---|---|---|---|
| Density at 23°C | 1.03–1.05 g/cm³ | 1.01–1.03 g/cm³ | 1.13–1.15 g/cm³ | ISO 1183-1 |
| Melting peak | 184–190°C | 175–180°C | 220–225°C | ISO 11357-3 |
| Tensile strength | 45–55 MPa | 40–50 MPa | 65–80 MPa | ISO 527-2 |
| Elongation at break | 200–300% | 200–350% | 30–100% | ISO 527-2 |
| Water absorption at saturation | 1.6–2.0 wt% | 1.4–1.8 wt% | 9.0–10.0 wt% | ISO 62 |
These values are representative of homopolymer film grades and may shift with pigmentation, plasticizer content, or post-fusion annealing. For the grey 7017 BHV RX variant specifically, the presence of inorganic pigments and charge-control additives can raise the density slightly above the unpigmented PA11 baseline, but published data for the exact magnitude of this shift is limited.
On production-scale fluidized bed lines, the preheating step controls both the rate of powder fusion and the final film thickness. For steel substrates with a blast profile of Sa 2.5 per ISO 8501-1 and an average roughness Rz 40 µm to 75 µm, parts are typically heated in a forced-air oven to a metal temperature between 250°C and 320°C. The heated part is then immersed in the fluidized powder bed for 3 s to 10 s, depending on part mass and desired film build. Film thickness per immersion pass ranges from 250 µm to 600 µm for plain carbon steel components with thermal mass above 2 kg. Batch-to-batch variance in film thickness of ±40 µm has been observed on lines operating without a dried air purge when ambient humidity exceeds 60% RH, due to moisture adsorption on the powder surface reducing particle mobility and fluidization quality. After removal from the bed, residual heat in the substrate completes flow and levelling; full fusion requires maintaining a surface temperature above the polymer melting point for 2 min to 5 min to achieve coalescence of individual particles. Thin sections with high surface-to-mass ratios may require a post-heat treatment at 180°C to 200°C for 10 min to 15 min to eliminate pinholes and surface microvoids. The fluidized bed itself is typically a rectangular tank with a porous polyethylene distributor plate, operated with an air velocity of 0.02 m/s to 0.08 m/s across the bed surface and a bed temperature maintained below 35°C to prevent premature sintering of the powder.
Electrostatic deposition of Rilsan Fine Powders T GREY 7017 BHV RX requires grounding of the substrate to a resistance below 1 MΩ to prevent back-ionization and orange peel. Corona charging guns are typically operated at 60 kV to 90 kV with a gun-to-part distance of 150 mm to 250 mm and an air flow rate adjusted to deliver a powder output of 100 g/min to 300 g/min. The powder is formulated with charge-control additives; the exact charge-to-mass ratio is not published in the current datasheet, but transfer efficiency under controlled booth conditions at 20°C to 25°C and 40% RH to 50% RH supports single-pass deposits of 150 µm to 400 µm. Faraday cage penetration on recessed geometries typically requires reduced gun voltage, auxiliary tribo-charging, or a second pass from a reverse angle. Cure after electrostatic deposition follows the same thermal profile as fluidized bed processing; parts are heated to 190°C to 210°C for 5 min to 10 min to ensure complete coalescence. High-efficiency cartridge recovery systems with booth face velocities of 0.5 m/s to 0.8 m/s capture overspray; recycled powder should be blended with virgin material at a ratio not exceeding 30 wt% to avoid excessive fines accumulation that degrades fluidization and causes spits in the applied film.
Operational boundaries for the grey 7017 BHV RX grade include a maximum continuous service temperature of approximately 120°C for unplasticized PA11 coatings, with short-term excursions to 150°C permissible only when no mechanical stress is applied. Below -40°C, impact resistance of the coating may decline, although the base PA11 polymer retains greater low-temperature toughness than PA6. The coating is not recommended for continuous immersion in strong mineral acids above 40°C or in polar solvents such as methanol or benzyl alcohol, which can cause swelling and adhesion loss. Powder stored in containers opened for more than 4 h at RH > 60% should be pre-dried at 80°C for 2 h in a desiccant air dryer before electrostatic application to avoid moisture-induced pinholes. Direct flame exposure and welding operations on coated parts are incompatible with the coating; weld spatter and heat-affected zones above 250°C cause local degradation and charring of the PA11 film.
If ambient humidity is not controlled below 60% RH during the preheating stage, water vapour adsorbs onto the cool oxide layer of the metal surface before the part reaches the fusion temperature. The subsequent immersion in the fluidized bed traps this moisture at the coating-substrate interface, generating steam that creates pinholes, blisters, and localized adhesion failure. For production lines using gas-fired ovens with open flues, combustion-generated moisture can raise the oven dew point above 10°C even when ambient RH is below 40%. The corrective measure is to install a desiccant air knife with an outlet dew point below -40°C immediately before the fluidized bed station, or to reduce the part surface temperature to 120°C to 150°C for 30 s to allow adsorbed water to desorb before dipping. Production-scale data from lines running 12 h shifts without dew point control show a defect rate increase of 5% to 8% in salt spray testing per ASTM B117 when ambient RH exceeds 65%. This defect rate correlates with microporosity at the interface, which cannot be fully healed by post-curing because the trapped steam has already disrupted wetting of the blast profile.
Fully cured films of Rilsan Fine Powders T GREY 7017 BHV RX are typically evaluated according to a combined adhesion-impact-flexibility protocol. Cross-cut adhesion testing per ISO 2409 commonly requires a classification of Grade 1 or better on blasted steel substrates, while direct impact testing per ISO 6272-1 often specifies no detachment at an impact energy of 18 J for a 1.5 mm thick flat panel. Mandrel bend testing per ISO 1519 with a 6 mm mandrel is used to detect cracking in films below 300 µm. Salt spray resistance per ASTM B117 for 1,000 h typically shows no under-film corrosion creep exceeding 2 mm from a scribe. These thresholds are not universal acceptance criteria; they represent common specifications for PA11 powder coatings on steel and must be confirmed for each part geometry and substrate alloy.
| Test property | Standard | Typical acceptance benchmark |
|---|---|---|
| Adhesion (cross-cut) | ISO 2409 | Grade 1 or better |
| Direct impact resistance | ISO 6272-1 | 18 J no detachment |
| Mandrel bend flexibility | ISO 1519 | No cracking on 6 mm mandrel |
| Salt spray corrosion | ASTM B117 | 1,000 h, creep ≤ 2 mm |
| Coating thickness | ISO 2808 | 250–600 µm per application requirement |
For parts destined for potable water contact or food processing environments, additional extraction and migration testing is required. The grey 7017 pigmentation may not be suitable for direct food contact applications without specific regulatory confirmation, even if the unpigmented PA11 base polymer meets applicable resin listings.
Regulatory status for the grey 7017 BHV RX formulation must be verified against the target market and application. The unpigmented PA11 base polymer may be formulated to comply with FDA 21 CFR 177.1500 for nylon resins and with EU Regulation 10/2011 for plastic food contact materials, but the grey pigment package and charge-control additives require specific migration testing. For industrial applications, the powder is expected to meet RoHS Directive 2011/65/EU restrictions on lead, cadmium, mercury, and hexavalent chromium, with compliance documented via IEC 62321 test methods. REACH registration for the PA11 polymer is maintained by Arkema; the formulated product may contain additional substances requiring downstream user obligations under REACH Article 33 if a Substance of Very High Concern exceeds 0.1 wt%. All compliance statements should be confirmed against the current safety data sheet and certificate of analysis for the specific batch, as formulation revisions under the BHV RX designation can alter trace metal content and extractable species.
