| HS Code | 110652 |
| Product | Arkema Rilsan Fine Powders ESY BLUE 7414 PA11 |
| Chemical Nature | Polyamide 11 |
| Color | Blue |
| Form | Fine Powder |
| Density | 1.04 g/cm³ |
| Apparent Density | 0.50 g/cm³ |
| Particle Size D50 | 45 µm |
| Particle Size D90 | 80 µm |
| Melting Point | 186 °C |
| Tensile Strength | 52 MPa |
| Elongation At Break | 350% |
| Shore Hardness D | 70 |
| Water Absorption 24h | 1.8% |
As an accredited Arkema Rilsan Fine Powders ESY BLUE 7414 PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsan Fine Powders ESY BLUE 7414 PA11, supplied in 25 kg net sealed multilayer paper bags, moisture-protected. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Arkema Rilsan Fine Powders ESY BLUE 7414 PA11, with secure palletization, dry conditions, and proper segregation. |
| Shipping | Ship as non-hazardous polymer powder in sealed, moisture-resistant packaging. Avoid conditions generating dust clouds; use grounding and anti-static precautions. Keep dry, away from ignition sources and incompatible oxidizers. Label as Arkema Rilsan Fine Powders ESY BLUE 7414 PA11, with proper handling documentation. |
| Storage | Store Arkema Rilsan Fine Powders ESY BLUE 7414 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. Avoid excessive humidity and temperature extremes. Maintain stable conditions to preserve powder flow and performance; use within recommended shelf life. |
| Shelf Life | Shelf life is approximately 2 years from manufacture when stored unopened, dry, and cool. |
A wire basket destined for a dishwasher cutlery rack is moved by overhead conveyor through a five-stage alkaline degrease and iron phosphate pretreatment before it enters the fluidised-bed chamber. Arkema Rilsan Fine Powders ESY BLUE 7414 PA11 is fluidised at an air pressure of 0.2–0.4 bar through a porous polyethylene distributor plate; the steel wire is preheated to 320–360 °C and dipped for 3–6 s. The fused film is then cured at 170–190 °C for 8–12 min. Coating thickness on wire intersections is specified at 250–400 µm, although the lower limit is increased to 300 µm where cutlery impacts the basket surface. Partial sintering occurs when preheat falls below 300 °C and creates pinholes detectable by low-voltage holiday testing; overheating above 380 °C oxidises the blue pigment and reduces melt viscosity. The wire diameter is often below 2 mm; thin-gauge parts cool from preheat to below 300 °C before the powder melts, so line speed is reduced or the entry oven setpoint is raised by 10–15 °C. Batch-to-batch variance in powder particle size with a D50 range of 80–120 µm influences edge coverage and fluid-bed expansion height. Chemical resistance is screened by immersion in 1 % sodium hydroxide at 60 °C for 168 h in accordance with ISO 2812-1:2017; adhesion after exposure is required to remain class 0–1 under ISO 2409. Food-contact assemblies are assessed under FDA 21 CFR 175.300 or EU 10/2011 for the final article. Typical terminal products include wire baskets, cutlery holders, and drying racks.
Edge coverage on rectangular copper busbars is limited by the Faraday cage effect at sharp radii; when a corona gun is operated above 80 kV, charged powder follows field lines away from recessed edges and leaves a thin dielectric zone. ESY BLUE 7414 is applied with a corona or tribo gun at a voltage of 60–80 kV, a powder output of 100–150 g/min, and a transport air volume of 3–4 m³/h. The copper bar is preheated to 60–80 °C to reduce back-ionisation without causing melt flow. After deposition the part enters a convection oven at 180–190 °C for 10–15 min; the final film thickness is 200–300 µm on flat faces and typically 100–150 µm on a sharp edge unless the edge is radiused. Dielectric strength is measured on flat plaques by ASTM D149 and is accepted at 20–25 kV/mm when specimens are conditioned at 23 °C ±2 °C and 50 % ±5 % relative humidity per ASTM D618. Comparative tracking index is evaluated under IEC 60112; the insulating coating is not a substitute for creepage and clearance design under IEC 60664-1. Published product-specific data for ESY BLUE 7414 on high-current busbar configurations is limited; qualification on the actual copper cross-section is necessary. Terminal products include insulated busbars in battery modules, switchgear busbar joints, and motor terminal brackets.
Suspension coil springs are abrasive-blasted and zinc-phosphated before the PA11 powder is applied by fluidised-bed dip. The spring is preheated to 280–320 °C and immersed for 5–10 s, producing a film build of 150–250 µm across the coil profile. Post-fusion is carried out at 170–190 °C for 8–12 min to complete coalescence without altering spring temper. The post-fusion oven must not exceed 190 °C on high-strength spring steel because temper softening can alter spring rate; production batch records include peak metal temperature at the spring eye. Stone-chip testing is performed under ISO 20567-1 at −20 °C with 0.5 kg of chilled cast-steel shot; a rating of 2 or better on the panel face and no bare steel on the scribe is typical for this coating chemistry. Neutral salt spray is run for 1000 h under ISO 9227; scribe creep is specified below 2 mm and adhesion after exposure must remain class 0–1 per ISO 2409. Low-temperature flexibility is evaluated by a mandrel bend test at −40 °C; the coating must show no cracking or delamination. The coated spring is then assembled and tested on a production spring fatigue machine; coating flakes generated by cyclic compression are measured gravimetrically between cycles. Terminal products include helical coil springs, stabiliser bar links, and brake hose mounting clips.
Aluminium deck hatch frames and cable cleats in splash-zone service are blast-cleaned to Sa 2½ according to ISO 8501-1 before ESY BLUE 7414 is applied by fluidised-bed dip. Aluminium parts are preheated to 220–260 °C to avoid work-hardening loss; steel parts in the same assembly are preheated to 280–330 °C. Aluminium sections with wall thickness below 4 mm are held at the lower end of the preheat window, while thicker steel inserts in the same hatch assembly require staged heating to avoid overshoot. Immersion time is 4–8 s, and the fused film is built to 300–400 µm after a post-cure of 170–190 °C for 10–15 min. A chrome-free conversion coating or silane pre-treatment is required before powder application on aluminium to prevent underfilm corrosion at scratch sites. Coating systems for offshore topside service are qualified under ISO 12944-6 for corrosivity class C5-M; additional requirements from NORSOK M-501 may apply when the assembly is specified for offshore platforms. Adhesion after seawater immersion at 23 °C for 1000 h is tested by ISO 2409; cathodic disbondment is evaluated by ISO 15711 on coated steel coupons at 23 °C in synthetic seawater at −1.0 V versus Ag/AgCl. Terminal products include hatch hinges, deck cleats, ladder rungs, and antenna mast brackets.
When de-icing salt remains on bench bases and bollard flanges, a 300 µm fused PA11 film changes the dominant failure mode from red-rust perforation to superficial gloss loss and colour drift. Steel bench frames and bollards are shot-blasted, preheated to 300–350 °C, and dipped in a fluidised bed of ESY BLUE 7414 for 5–9 s. The resulting film thickness is held between 300–400 µm, with the higher end specified for weld seams and base plates where salt water accumulates. Post-fusion at 170–190 °C for 10–15 min completes interfacial bonding. Coated test panels are exposed to 1000 h of neutral salt spray under ISO 9227 and to 3 % sodium chloride solution at 23 °C for 1000 h; blisters must remain below density 2 and size 2 under ISO 4628-2. UV ageing is performed under ISO 16474-2 for 1500 h; the blue pigmentation is specified to retain a ΔE of no more than 3.0 measured by ISO 7724. Impact resistance after ageing is verified at 2.5 J by ISO 6272. Terminal products include park benches, bicycle racks, bollards, and railing systems.
Cast iron butterfly valve bodies are preheated to 300–330 °C after grit blasting removes foundry scale and graphite smearing from the machined flange faces. ESY BLUE 7414 is applied by fluidised-bed immersion for 6–12 s, producing a lining thickness of 350–500 µm on internal water passages. The coated valve body is post-cured at 170–190 °C for 12–18 min because the heavy casting wall requires a longer through-heat dwell than sheet metal. Pinhole detection is performed after cooling to ambient because holiday testing on a hot lining produces false negatives from thermal expansion and moisture. A high-voltage holiday detector is used at 5 V/µm of measured dry film thickness in accordance with NACE SP0188; the acceptance limit is no electrical breakthrough at any point. Dry film thickness is measured magnetically by ISO 2178 on cast iron and by ISO 2360 when austenitic stainless-steel internal components are included. Adhesion is checked by ISO 2409 after 24 h water immersion at 23 °C. For potable water contact, the final valve assembly is certified under NSF/ANSI 61 or the applicable national regulation; ESY BLUE 7414 itself is supplied under REACH and RoHS 2011/65/EU documentation. Terminal products include butterfly valve bodies, pump volutes, and impeller hubs for water treatment.
| Application | Surface preparation | Preheat window | Fused film build | Primary test standard |
|---|---|---|---|---|
| Dishwasher basket | Alkaline degrease, iron phosphate | 320–360 °C | 250–400 µm | ISO 2409 |
| Busbar insulation | Solvent wipe, edge radius | 60–80 °C | 200–300 µm | ASTM D149 |
| Automotive spring coil | Abrasive blast, zinc phosphate | 280–320 °C | 150–250 µm | ISO 9227 |
| Marine deck hardware | Sa 2½ blast, silane pre-treatment | 220–260 °C | 300–400 µm | ISO 15711 |
| Outdoor street furniture | Shot blast, weld seam repair | 300–350 °C | 300–400 µm | ISO 16474-2 |
| Valve body lining | Grit blast, flange masking | 300–330 °C | 350–500 µm | NACE SP0188 |
Post-cure in forced air ovens at 180–190 °C for 10–15 min is required to sinter the PA11 film on thin-wall steel tube without distortion. Side rails and IV pole bases are degreased, iron-phosphated, and coated by electrostatic spray with a film build of 150–250 µm; the substrate is warmed to 60–80 °C before spraying to improve first-pass adhesion on weld fillets. Non-coated masked regions are kept below 1 mm from the powder edge by use of high-temperature paper masking. Oven air temperature uniformity across the rack is held within ±5 °C, because lower zones on a full load can lag by up to 8 °C and produce under-sintered film on the lowest side rail. Disinfectant resistance is determined by cyclic exposure to 0.5 % sodium hypochlorite and 2 % quaternary ammonium compound for 100 cycles according to ISO 2812-1:2017; gloss retention and adhesion after the sequence must remain within customer drawing limits. Cytotoxicity of the final coated device is evaluated under ISO 10993-5; the coating system is not intended for permanent implant applications. Colour consistency of ESY BLUE 7414 is checked by spectrophotometer against a reference panel; ΔE is held below 1.5 for parts visible on the same hospital bed frame. Terminal products include patient lift arms, side rails, IV pole bases, and transport chair frames.
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Arkema Rilsan Fine Powders ESY BLUE 7414 PA11 is a blue-pigmented semi-crystalline polyamide 11 powder supplied for thermoplastic coating of metal substrates by fluidised-bed dipping, electrostatic spray, and aqueous dispersion deposition. The base polymer is a homopolyamide synthesised from 11-aminoundecanoic acid derived from castor oil, which gives the grade a lower amide-group concentration than short-chain polyamides such as PA6 and PA66. The ESY BLUE 7414 designation identifies a fine powder within the Arkema Rilsan Fine Powders range; its colour package is compounded into the melt before grinding, so the pigment is dispersed within the polymer particle rather than dry-blended on the surface. On production-scale fluidised-bed lines, carbon steel parts are preheated to 280–400 °C, dipped into the fluidised powder, and then post-fused in a convection oven at 200–220 °C to complete film coalescence. Because the coating remains thermoplastic, multiple immersion passes can build thickness, and local defects can be heat-welded without crosslinked-network failure.
The grade is not a general-purpose moulding or extrusion resin. Its particle size, melt rheology, and additive package are configured for film formation at dry film thicknesses commonly between 250 µm and 450 µm in single-pass immersion. Thicker deposits require either higher substrate thermal mass or multiple preheat-and-dip cycles. The blue pigmentation does not function as a corrosion inhibitor; corrosion protection arises primarily from the continuous barrier layer and from adhesion promoted by a grit-blasted surface profile with a typical roughness of Rz 40–75 µm according to ISO 8501-1 and ISO 8503-2. On degreased carbon steel, adhesion values measured by pull-off methods under ISO 4624 are strongly dependent on primer selection. Published data for this specific blue grade are limited, and converters should qualify adhesion on the actual substrate rather than extrapolating from unpigmented Rilsan Fine Powder data.
Coating-grade polyamide 11 powders are controlled by volume-median particle diameter and top cut, not by pellet geometry. In Rilsan Fine Powders, the typical D50 for fluidised-bed application is reported in supplier technical literature near 100–120 µm, with a top cut below 200–250 µm; the exact ESY BLUE 7414 certificate of analysis should be consulted because blue pigment aggregates can shift the laser-diffraction D90 by several micrometres relative to natural grades. The particle size distribution is measured by ISO 13320-1 dry laser diffraction. Oversize particles above 250 µm produce orange-peel and localised thickness spikes; excessive fines below 20 µm reduce fluidisation quality in the bed and can increase moisture adsorption due to high specific surface area. Extrusion-grade PA11 is supplied as pellets above 2 mm, which cannot be fluidised and must be cryogenically ground before coating use. The ESY grade therefore differs from Rilsan moulding and extrusion products in both particle geometry and additive stabilisation for prolonged thermal exposure during oven fusion.
In fluidised-bed operations, the powder is not heated directly; the substrate heat drives sintering. A common failure mode on production lines coating thin sheet-metal brackets is rapid quenching of the part surface below the polyamide 11 crystallisation point before sufficient powder adheres. Operators compensate by increasing preheat oven temperature or by using higher substrate mass. Reclaimed powder from fluidised-bed hoppers should be sieved through a 200 µm screen before reuse because fused agglomerates and airborne contaminants alter the particle size distribution and cause film defects. Polyamide 11 powder stored at relative humidity above 60% can develop surface moisture that reduces electrostatic chargeability and creates steam pinholes during fusion; pre-drying in a desiccant dryer at 80 °C for 4 h is a common corrective measure for open containers.
Melt coalescence of the deposited powder layer is controlled by the zero-shear viscosity of the polyamide 11 melt and the capillary pressure acting on interparticle voids. At fusion temperatures of 200–220 °C, PA11 exhibits a relatively low melt viscosity compared with PA6 at equivalent molecular weight, which permits void closure to occur within typical oven residence times of 3–10 min. Thick films above 500 µm may retain entrapped air because the outer surface reaches the melt state before the powder adjacent to the substrate; this condition is observed as microbubble haze through the blue film. In fluidised-bed lines, the problem is controlled by lowering initial peak cure temperature or extending the lower-temperature post-fusion zone to allow air to escape before full skin formation. The exact viscosity number of ESY BLUE 7414 should be confirmed by ISO 307; published data for this specific grade is limited.
The base resin of ESY BLUE 7414 displays the characteristic melting behaviour of polyamide 11. Differential scanning calorimetry according to ISO 11357-3 typically places the main endotherm between 183 °C and 189 °C for Rilsan PA11 coating powders, with crystallisation on cooling beginning near 150–160 °C. The density of unfilled PA11 is reported in the range 1.03–1.05 g/cm³ under ISO 1183-1. Water uptake at saturation in water at 23 °C is approximately 1.8–2.0% by ISO 62, which is lower than the 9–10% typical of PA6 and PA66. This lower equilibrium water sorption reduces the hygroscopic dimensional swell that can cause coating delamination on steel and aluminium parts exposed to condensation or outdoor humidity. Tensile properties of the base moulding resin are commonly cited near 50–55 MPa tensile strength with elongation at break above 200% under ISO 527-1/2; however, coating film tensile values are thickness- and porosity-dependent and should be measured on free films rather than extrapolated from injection-moulded specimens.
| Property | PA11 coating grade | PA12 coating grade | PA6 reference |
|---|---|---|---|
| Saturation water uptake at 23 °C | 1.8–2.0% | 1.5–1.7% | 9–10% |
| Melting peak | 183–189 °C | 175–180 °C | 220–225 °C |
| Density | 1.03–1.05 g/cm³ | 1.01–1.03 g/cm³ | 1.13–1.14 g/cm³ |
Three deposition modes are used with Rilsan Fine Powders. Fluidised-bed dipping is preferred for high film build on complex geometries, electrostatic spray is used for thin films on preheated sheet metal or for touch-up, and aqueous dispersion coating permits lower-temperature processing of heat-sensitive substrates because the powder is dispersed in water and fused after water evaporation. In aqueous dispersion, the blue pigment must resist leaching during the liquid phase; therefore the dispersion pH is controlled between 4 and 8 to avoid hydrolysis of the polyamide surface and pigment destabilisation. The powder’s hydrophobic surface and particle size distribution influence suspension stability. Cationic or nonionic surfactants are sometimes used, but published data for this specific configuration is limited.
Adhesion of ESY BLUE 7414 to steel depends on the surface preparation sequence. Degreasing is followed by abrasive blasting to a cleanliness of Sa 2½ according to ISO 8501-1 and a profile of Rz 40–75 µm. A Rilsan primer is usually applied at 3–10 µm dry film thickness before powder deposition. Without primer, pull-off adhesion may still exceed 10 MPa on freshly blasted steel, but cathodic disbondment and wet adhesion are less predictable. On aluminium, chemical conversion coating or blasting is required; the higher thermal conductivity of aluminium requires higher preheat temperatures or longer oven recovery because the part quenches the molten powder quickly.
Electrostatic application of ESY BLUE 7414 depends on the powder’s ability to accept and retain charge during transport from the gun to a grounded or preheated substrate. Corona charging equipment operates typically at 60–100 kV, while tribostatic guns rely on frictional charging through polytetrafluoroethylene contact surfaces. The blue pigment system can alter surface resistivity compared with unpigmented or carbon-black-filled Rilsan powders; therefore, gun settings established for natural PA11 may require adjustment. If the powder charge-to-mass ratio falls below about 0.2 µC/g, transfer efficiency on complex geometries drops sharply; values above 2.0 µC/g can produce back-ionisation and pinholes in the fused film. These thresholds are practical window values from powder-coating process literature rather than grade-specific data for ESY BLUE 7414. In electrostatic spray, the part surface is usually preheated to 180–220 °C after primer application, or the powder is applied to a hot substrate to initiate fusion; published data for this specific configuration is limited.
Fluidised-bed process stability for ESY BLUE 7414 is influenced by air humidity, powder bed level, and substrate temperature. The fluidising air should be clean, dry compressed air at a dew point below 3 °C to prevent powder moisture pickup. Bed density is typically maintained by adding fresh powder in small increments rather than large refills, because large refills can create size segregation: fine particles remain airborne while coarse particles settle. On lines coating steel valve bodies of 2–5 kg mass, sufficient heat capacity yields a fused film of 300–400 µm without post-fusion; thin brackets below 0.5 kg often require higher preheat temperatures or external post-heat infrared panels. These settings are equipment-specific and must be established by process capability studies rather than transferred directly from natural PA11 powder settings.
Chemical resistance of fused PA11 coatings is governed by the semi-crystalline polyamide matrix. The material resists aliphatic hydrocarbons, oils, greases, and many salt solutions at ambient temperature, but is not recommended for continuous immersion in strong mineral acids, phenol, or formic acid, which solvate or hydrolyse the amide linkage. In dishwasher basket applications, the coating must tolerate alkaline detergents at 60–85 °C; the polymer’s low water absorption helps maintain adhesion, but detergent additives such as chlorine bleaches can degrade surface gloss and should be evaluated under ISO 9227 NSS and immersion protocols specific to the appliance manufacturer. The blue pigment does not prevent ultraviolet-induced chalking in outdoor exposure; long-term exterior use requires UV-stabilised grades or topcoating where colour retention is critical.
Compared with polyamide 12 coating powders, the PA11 matrix of ESY BLUE 7414 provides a higher melting point and a higher proportion of renewable carbon from castor oil. PA12 offers lower saturation water uptake and may be preferred in applications where dimensional stability under total water immersion is the dominant criterion. Compared with Rilsan PA11 natural fine powder grades, the blue-pigmented version may show slightly different electrostatic charging and colour-dependent radiative heating in infrared preheat ovens; process settings for infrared emitters should be re-qualified because dark blue absorbs infrared energy differently than natural or white powder. Compared with thermoset epoxy or polyester powders, Rilsan Fine Powders are distinctly thermoplastic and do not crosslink during fusion, which permits re-flow and repair but also means the film softens at elevated service temperatures near the PA11 melting point.
Batch-to-batch control of ESY BLUE 7414 in coating operations focuses on particle size distribution, moisture content, pigment dispersion, and melt-flow behaviour. Moisture content is typically specified below 0.5% by Karl Fischer titration after drying; higher moisture creates pinholes and lowers electrostatic transfer. Pigment dispersion can be assessed by visual inspection of fused films at 250 µm thickness; pigment agglomerates above 20 µm are visible as dark specks in the blue finish. Melt-flow rate is not typically specified for powder coating grades because the polymer is not processed in a screw extruder; intrinsic viscosity by ISO 307 is more relevant to fusion and sag behaviour. On twin-screw extrusion lines used to compound the blue pigment masterbatch, the base polymer must be dried below 0.1% moisture to prevent hydrolysis and viscosity loss.
Regulatory status of the exact blue grade must be verified against the current safety data sheet and regulatory information. Arkema Rilsan PA11 base polymers are commonly listed for food contact use under FDA 21 CFR 177.1500 for nylon resins and may be evaluated under EU Regulation 10/2011; however, the blue pigment and processing additives in ESY BLUE 7414 require separate migration testing for the intended food-contact condition. The powder should not be assumed compliant for drinking-water contact without test data because pigment extraction limits are application-specific. REACH and RoHS obligations are addressed by the supplier for the base grade, but downstream applicators remain responsible for the final coated article.
The ESY BLUE 7414 grade is not intended for melt compounding, injection moulding, or filament extrusion. Attempts to process the fine powder in a twin-screw extruder without pelletising or feeding aids can result in feed throat blockage due to low bulk density and particle interlocking. For coating operations, ambient storage should be below 30 °C and away from direct sunlight; opened bags should be consumed within a limited time or kept sealed with desiccant because re-absorbed moisture causes fluidisation non-uniformity. The powder should not be blended with other polyamide types or with recycled coating powders without verifying melting-point compatibility, because crystalline melting-point mismatch can produce unmelted inclusions and poor interlayer adhesion. Published data for this specific blue grade in all application configurations is limited; batch-specific certificates of analysis remain the authoritative source for melt temperature, particle size, moisture, and pigment content.
