| HS Code | 322089 |
| Product Name | Rilsan Fine Powders T GREY 5161 MAC |
| Material | Polyamide 11 (PA11) |
| Color | Grey |
| Physical Form | Fine powder |
| Particle Size D50 | 61 µm |
| Bulk Density | 0.42 g/cm³ |
| True Density | 1.04 g/cm³ |
| Moisture Content | <0.5% |
| Melting Point | 178 °C |
| Glass Transition Temperature | 45 °C |
| Tensile Strength | 44 MPa |
| Elongation At Break | 350% |
| Shore Hardness D | 70 |
| Water Absorption 24h | 0.3% |
| Dielectric Strength | 16 kV/mm |
As an accredited Arkema Rilsan Fine Powders T GREY 5161 MAC PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg bag of Arkema Rilsan Fine Powders T GREY 5161 MAC PA11, grey polyamide powder for coating applications. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Arkema Rilsan Fine Powders T GREY 5161 MAC PA11, a polyamide 11 powder, for safe transport. |
| Shipping | Shipping description: Polyamide 11 powder (Arkema Rilsan Fine Powders T Grey 5161 MAC PA11), non-hazardous under standard transport regulations. Pack in sealed, moisture-proof containers to prevent caking. Keep away from static sources, sparks, and high heat. Not regulated as dangerous goods for road, rail, sea, or air freight. |
| Storage | Store Rilsan Fine Powder T GREY 5161 MAC PA11 in its original, tightly sealed container in a cool, dry, well-ventilated area away from heat, open flames, direct sunlight, and ignition sources. Protect from moisture and humidity to prevent clumping or degradation. Keep containers closed when not in use and handle to minimize dust generation. |
| Shelf Life | Shelf life is typically 12 months from delivery when stored unopened in a cool, dry place. |
On high-volume dishwasher basket lines using low-carbon steel wire from 3.0 mm to 6.0 mm diameter, Arkema Rilsan Fine Powders T GREY 5161 MAC PA11 is fluidized as a single-component 100 wt% solids powder coating. The wire goods are typically resistance-welded from bright steel, then degreased in alkaline solution at 60°C to 80°C and given a zinc phosphate conversion coating with a final deionized-water rinse below 30 µS/cm. Preheat to 300°C–360°C measured at the part surface, followed by fluidized-bed immersion for 3 s to 10 s, produces a fused film thickness of 300 µm–500 µm depending on wire diameter and part thermal mass. Powder consumption at this thickness is 1.2 kg/m² to 1.8 kg/m², which is the practical addition ratio for the coating operation because no solvent, catalyst, or dispersant is added at line. Post-fusion is carried out at 220°C–240°C for 3 min–8 min. Compliance for coated dishwasher baskets is assessed under NSF/ANSI 51 for food-equipment service, and the polyamide 11 base polymer is listed in FDA 21 CFR 177.1500 as a nylon resin; corrosion acceptance is commonly evaluated by ISO 9227 neutral salt spray on cut edges with an OEM-defined rust-creep limit. Failure mode knowledge from production: baskets with edge-film thickness below 250 µm show rust creep before 500 h, while overcured parts above 260°C for more than 12 min exhibit amber discoloration but not necessarily loss of corrosion protection. Terminal finished goods include upper and lower rack assemblies, cutlery baskets, tine covers, and accessory rail systems. The powder must be stored below 50% RH; if exposed above 60% RH, re-drying at 70°C–80°C for 4 h is required to avoid pinhole formation from absorbed moisture.
Zinc-phosphated Bundy tube surfaces reach the powder line after cleaning and conversion, but preheat uniformity is the primary process variable for film thickness when Arkema Rilsan Fine Powders T GREY 5161 MAC PA11 is applied in an electrostatic spray booth. Tube wall temperature is held at 230°C–260°C; below 220°C, sprayed particles fail to coalesce fully, leaving pinholes at phosphate crystal tips, while above 280°C, the first particles to contact the surface begin oxidative yellowing. The topcoat is a 100 wt% solids powder; in a two-coat automotive system, an epoxy or phenolic primer at 5 µm–15 µm dry film thickness is the only wet layer. Topcoat addition is 0.8 kg/m²–1.4 kg/m², yielding a dry film thickness of 250 µm–450 µm after post-fusion at 220°C–240°C for 3 min–8 min.
Rheological behavior of PA11 at fusion is a viscosity-driven flow process rather than a thermoset cure. At 220°C, zero-shear viscosity is in the range of 10³ Pa·s to 10⁴ Pa·s; the exact value for the grey 5161 MAC grade appears on the lot certificate because pigment and filler loading shift the low-shear melt curve. The coating relies on particle coalescence and surface-tension-driven leveling. Processors running reciprocating guns at booth air velocity above 0.5 m/s observe reduced transfer efficiency below 70% on small-diameter brake tubes; correction requires lowering cross-flow or raising emitter voltage within 60 kV–100 kV. Gel time measured per ISO 8130-6 at 180°C should be taken from the certificate; typical PA11 fine powder values are 60 s–180 s, but published data for this specific configuration is limited. Validation references include ISO 16750-4 for thermal shock, ISO 9227 neutral salt spray for 1000 h–1500 h, and SAE J400 for stone-chip resistance. Downstream manufacturing includes tube drawing, endforming, phosphating, primer application, electrostatic powder spray, post-fusion, and adhesion testing. Finished product types include double-wall brake tube, fuel vapour return lines, clutch actuator tubing, and cooling transfer lines.
| Validation parameter | Standard designation | Typical acceptance window |
|---|---|---|
| Cross-cut adhesion | ISO 2409 | ≤ grade 1 |
| Reverse impact | ASTM D2794-93 | ≥ 80 in-lb |
| Neutral salt spray | ISO 9227 NSS | no creep > 2 mm at scribe after 1000 h |
| Thermal shock | ISO 16750-4 | no chipping after 50 cycles from -40°C to 120°C |
For water-treatment pump and valve components, the cast substrate is prepared to ISO 8501-1 Sa 2½ by abrasive blasting, then primed with a two-pack epoxy or zinc-rich liquid primer at 5 µm–20 µm dry film thickness. The topcoat addition ratio is 100 wt% of Rilsan Fine Powders T GREY 5161 MAC PA11; no solvent, thixotrope, or catalyst is added to the fluidized-bed charging hopper. Preheating of cast iron or ductile iron components to 280°C–340°C and immersion for 10 s–30 s produces a fused lining of 350 µm–600 µm for immersion service on pump housings and valve bodies; non-immersed flanges are controlled at 250 µm–400 µm. Post-fusion at 220°C–240°C for 5 min–15 min is required to eliminate micro-pinholes. Compliance for potable-water components is evaluated under NSF/ANSI/CAN 61, while the corrosion-protection system is specified under ISO 12944-6 category C5-I or C5-M as appropriate. Terminal finished product types include butterfly valve discs, sluice gate plates, check valve bodies, pump impeller hubs, diffuser cones, and flanged pipe spools. Operational boundaries are specific: the coated part should not exceed 120°C under dry continuous load, and exposure to saturated steam above 110°C poses a hydrolysis risk to the polyamide backbone. The system is not recommended for strong mineral acid service below pH 2 unless validated by an immersion trial using ISO 2812 methodology.
When electrical clearances on high-current busbar runs fall below 2.5 mm because of pack geometry, the powder is used as edge insulation on copper and aluminium bar sections. The forming process starts with stamped or machined busbar segments, optional nickel or tin plating, surface cleaning, and preheat to 200°C–240°C. Electrostatic guns set at 60 kV–80 kV apply the powder as a 100 wt% solids coating; the addition ratio is the same powder formulation with no solvent or conductivity additive. Target dry film thickness is 200 µm–400 µm, with a second pass or horizontal fixturing used when edge coverage below 150 µm is detected. Post-cure is 220°C for 5 min to allow complete flow over punched edges. Compliance is evaluated under IEC 60664-1 for insulation coordination, IEC 60243-1 for electric strength of the insulating film, and ASTM D257 for surface resistivity; a clean PA11 film generally exceeds 10¹³ Ω/square, but the exact grey-pigmented 5161 MAC value must be read from the material certificate. Terminal finished products include insulated busbar risers, battery pack interconnect bars, DIN 46230 cable-lug transition points, and high-current distribution bars. Process limitation: parts with tight bend radii or sheared copper edges may require touch-up application because melt-flow pulls resin away from high-energy peaks; this is mitigated by fixturing in the horizontal plane and limiting oven temperature to 230°C.
Hospital equipment manufacturers use the powder on stainless steel tubular frames and machined handles where repeated autoclave exposure at 121°C for 30 min or 134°C for 18 min imposes thermal-humidity stress at the coating-substrate interface. The substrate is cleaned, passivated, and roughened by aluminium oxide blasting before preheating to 220°C–260°C. Application is by electrostatic spray or dip coating from a 100 wt% solids powder reservoir; the formulation addition ratio is 100 wt% of Arkema Rilsan Fine Powders T GREY 5161 MAC PA11 with no external plasticizer or co-resin. Target dry film thickness is 150 µm–300 µm; parts with thick cross-sections require 15 min–30 min additional dwell at 210°C–230°C for full interfacial coalescence. Biocompatibility validation is carried out under ISO 10993-5 for cytotoxicity and ISO 10993-10 for intracutaneous irritation; the grade does not automatically carry USP Class VI certification, and if the end-use position requires USP <88> Class VI, the fabricated coated part must be qualified according to USP <88> after lot-specific material review. Terminal finished goods are instrument handles, mobility device handgrips, bed rail covers, and positioning arm cladding. A known boundary is that steam autoclave cycling may produce blisters if the coating thickness exceeds 300 µm because moisture permeation through the polyamide film stresses the interface; adhesion loss under ISO 2409 is the release criterion after 50 autoclave cycles.
After hot-dip galvanizing to ISO 1461, architectural steel parts are sweep-blasted with fine corundum to a surface profile of 25 µm–50 µm before preheating to 260°C–300°C. The powder is applied as a 100 wt% solids topcoat by fluidized bed or electrostatic spray to a dry film thickness of 350 µm–500 µm; corresponding powder consumption is 1.5 kg/m²–2.0 kg/m². The formulated addition ratio is 100 wt% of the supplied Rilsan Fine Powders T GREY 5161 MAC PA11, with no solvent or reactive diluent; touch-up consistency is maintained by using the same powder batch. Post-fusion is 220°C–240°C for 5 min–10 min, followed by forced cooling to below 60°C before stacking. Corrosion protection is specified under ISO 12944-5 for category C4 or C5; adhesion is checked by ISO 2409 cross-cut, and impact resistance by ASTM D2794-93. Accelerated weathering is evaluated under ASTM D4587 for the grey pigment system, but UV color retention is not indefinite and must be agreed with the specifier. Terminal finished products are modular park benches, railing infill panels, bollard tubes, and lighting column access covers. Storage and handling boundaries are: keep powder below 30°C away from direct sunlight; if ambient humidity exceeds 70% RH, re-dry at 70°C–80°C for 3 h–4 h before charging the hopper to avoid pinholes.
Competitive Arkema Rilsan Fine Powders T GREY 5161 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 T GREY 5161 MAC PA11 is a polyamide 11-based thermoplastic powder coating material supplied in a pigmented grey formulation. It belongs to the Rilsan fine powder range used for electrostatic spray and fluidized bed immersion coating of metal components. The product designation combines the Rilsan fine powder platform, the T powder class, the grey 5161 colour formulation, and the MAC manufacturing control suffix. The base polymer is a semi-crystalline polyamide synthesised from 11-aminoundecanoic acid derived from castor oil, producing a coating with low equilibrium water uptake, high elongation, and resistance to salt spray, aliphatic hydrocarbons, and many alkaline environments. Grade-specific values for particle size distribution, moisture content, melt flow, and colour tolerance are not transferable from generic PA11 extrusion resins and must be obtained from the lot-specific certificate of analysis for 5161 MAC. The powder is used where a grey non-black finish is required without sacrificing PA11 corrosion protection, including pipe spools, valve bodies, fittings, handrails, and urban infrastructure components. Dry film thickness is normally governed by the end-user coating specification and measured according to ISO 2808.
Electrostatic spray application of the powder is controlled by particle-size distribution, surface moisture, and charge acceptance. Corona-charging spray guns are operated on production lines with gun voltage typically between 40 kV and 100 kV, gun-to-part standoff from 150 mm to 300 mm, and powder output from 30 g/min to 200 g/min. The substrate is electrically grounded and preheated so that impinged particles stick and begin to coalesce. For PA11 fine powders, the surface temperature during spraying is maintained above the crystalline melting point; practical oven set points for small and medium steel parts are commonly between 250 °C and 300 °C, but the actual setting must be determined for the part mass and line speed. Film formation proceeds through particle attachment, sintering, and flow-out. Adsorbed moisture on the powder surface is the primary source of microporosity, blow-holes, and reduced adhesion. When storage conditions exceed 60% relative humidity, the powder is pre-dried in a dehumidified air oven at 80 °C to 100 °C for 4 h to 6 h. Moisture content is measured by Karl Fischer titration according to ISO 15512. The grey pigmentation in 5161 MAC can shift charge-decay behaviour relative to unpigmented PA11; therefore, substitution of grey for natural powder requires first-article requalification of gun voltage, current draw, and transfer efficiency.
For fluidized bed immersion, the powder is aerated with dried compressed air or nitrogen. The fluidizing air should have a pressure dew point below −40 °C to prevent agglomeration. Steel parts are grit-blasted to ISO 8501-1 Sa 2½ with an angular abrasive producing a surface profile of 50 µm to 85 µm Rz according to ISO 8503-2. After removal of dust and verification of surface contamination, the part is heated to a mass-dependent preheat temperature and immersed for a controlled dwell time. Typical PA11 immersion coatings for pipe spools, valves, and fittings are applied at dry film thicknesses between 250 µm and 500 µm. The residual heat of the part fuses the powder into a continuous film, after which the part is air-cooled or water-quenched. Air cooling produces a more crystalline and harder surface with lower gloss; water quenching reduces crystallinity and increases gloss. These differences are not powder defects but process outcomes that must be fixed in the coating procedure when visual consistency is part of the acceptance criteria.
Large steel sections act as heat sinks. The preheat temperature must compensate for thermal mass so that the surface remains above the PA11 melting point during immersion. Production-scale practice is to heat the part until the surface temperature is 50 °C to 80 °C above the PA11 melting point before immersion. Thin sheet sections may require only 20 °C superheat, while heavy flanges may require more than 100 °C superheat. Insufficient superheat causes low powder pick-up, poor coalescence, and delamination; excessive superheat causes discoloration and thermal degradation. Surface temperature should be verified with a contact thermocouple or an infrared pyrometer calibrated for the emissivity of hot steel.
Substitution of a grey pigmented PA11 for a carbon-black-filled PA11 changes more than colour. Carbon black acts as a UV absorber and charge-control agent in powder coatings. The grey 5161 formulation may not contain the same conductive carbon loading, so weathering and electrostatic behaviour must not be assumed identical. Outdoor exposure in high-UV regions requires accelerated weathering data generated under ISO 4892-2 cycles using the exact 5161 MAC formulation, because photo-oxidation and hydrolysis of PA11 can cause gloss loss, chalking, and surface microcracking. Published data for this specific grey configuration is limited; the specifier should require weathering test reports from the powder manufacturer rather than relying on generic PA11 ultraviolet resistance.
Mechanically, PA11 powders exhibit high elongation and sub-zero impact resistance. The amorphous regions retain mobility at low temperatures, and PA11 is frequently used on components that must withstand impact at −40 °C. Fusion-bonded epoxy coatings provide higher hardness and strong adhesion but can fail by brittle cracking under point impact at equivalent sub-zero conditions. The selection between PA11 and epoxy is therefore determined by the expected failure mode: epoxy is favoured for hardness and chemical barrier requirements, while PA11 is preferred where impact, elongation, and thermal cycling dominate.
Relative to PA12, the PA11 base in Rilsan T Grey 5161 MAC has a higher amide frequency and a moderately higher melting point with correspondingly higher stiffness. PA12 has slightly lower water absorption and lower density; PA11 is often selected when higher renewable carbon content, higher temperature capability, or specific chemical resistance is required. Relative to PA6 and PA66, PA11 has substantially lower equilibrium moisture uptake, which reduces dimensional change and vapour-pressure-driven blistering under hot wet service. A direct drop-in replacement between PA11, PA12, or PA6 powders on the same coating line is not guaranteed because preheat settings, recirculation rates, and charge behaviour must be revalidated.
Representative physical-property ranges for general Arkema Rilsan PA11 fine powder coatings are given below. These values are drawn from published PA11 coating resin data and are not a substitute for the 5161 MAC certificate of analysis.
| Property | Test method | Typical value |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.03–1.04 g/cm³ |
| Melting point | ISO 11357-3:2018 | 183–187 °C |
| Water absorption at 23 °C, 50% RH | ISO 62:2008 | 1.0–1.2% |
| Tensile stress at yield | ISO 527-2:2012 | 38–42 MPa |
| Elongation at break | ISO 527-2:2012 | >200% |
| Shore D hardness | ISO 868:2003 | 70–75 |
Batch release for a pigmented PA11 fine powder should include particle-size distribution, moisture content, colour coordinates, and melt flow. Particle-size distribution is measured by laser diffraction according to ISO 13320-1; the D10, D50, and D90 values define the spread that controls powder flow and electrostatic transfer. Excess fines reduce flow and can cause gun spitting, while oversize particles produce surface roughness and poor levelling. Colour is measured by ISO 7724-2:2007; the grey 5161 designation implies a defined L*, a*, b* coordinate set, but the acceptance tolerance is supplied by the manufacturer. The applicator should verify incoming lots against the agreed colour tolerance because batch-to-batch pigment dispersion variation can alter film appearance.
Moisture control is the main processing constraint. If the powder is opened in a high-humidity environment and not dried before use, absorbed water flashes during fusion and leaves pinholes, craters, or internal porosity. The powder should be stored in sealed, moisture-barrier packaging at ambient temperatures below 30 °C and relative humidity below 60%. Returned overspray must be screened through a 125 µm sieve and blended with fresh powder at a controlled ratio. Excessive reuse of reclaimed powder increases the concentration of degraded fine particles and can reduce charge stability. The reclaimed powder fraction is typically kept below 30% of total feed unless the application procedure has been qualified at a higher level. Incompatibility with high levels of amine-functional silanes and some ester plasticizers should be evaluated, because strongly alkaline or nucleophilic species can accelerate amide hydrolysis at processing temperatures. Continuous exposure to strong mineral acids, strong oxidizers, phenols, and concentrated formic acid is outside the usual chemical resistance envelope of PA11. For food-contact uses, compliance with FDA 21 CFR 175.300 or EU Regulation 10/2011 is not an automatic property of every pigmented grade; the exact 5161 MAC formulation must be documented for the intended article.
The comparative behaviour of PA11, PA12, and fusion-bonded epoxy is summarised below. The values are representative industrial ranges and do not override grade-specific data for the 5161 MAC product.
| Property | PA11 fine powder coating | PA12 powder coating | Fusion-bonded epoxy |
|---|---|---|---|
| Film-forming mechanism | Thermoplastic melt flow | Thermoplastic melt flow | Thermoset crosslinking |
| Melting or cure temperature | 183–187 °C | 176–180 °C | 180–250 °C cure |
| Elongation at break | >200% | >200% | 2–5% |
| Water absorption, 23 °C/50% RH | 1.0–1.2% | 0.7–1.0% | <0.5% |
| Low-temperature impact behaviour | High | High | Low to moderate |
| Renewable carbon content | High | Variable | None |
In production equipment, the grey 5161 MAC powder is handled through conventional fluidized bed tanks, corona spray guns, and reclaim systems. Batch-to-batch variation in particle size and pigment dispersion is controlled by the supplier, but incoming inspection should include particle-size and moisture tests to prevent start-up variation. The material should not be mixed with conductive fillers or dissimilar thermoplastics without a defined requalification trial, because charge acceptance, melt viscosity, and colour stability may be altered. Processing parameters established for natural PA11 are not automatically valid for the grey 5161 MAC grade. Each first article is checked for dry film thickness, adhesion, holiday detection, and visual colour before full-scale coating begins.
