| HS Code | 422944 |
| Density 23 C | 1.02 g/cm³ |
| Melting Point Dsc | 183 °C |
| Glass Transition Temperature | 45 °C |
| Tensile Strength At Yield | 34 MPa |
| Elongation At Break | 300 % |
| Flexural Modulus | 700 MPa |
| Shore D Hardness | 55 |
| Charpy Impact Strength 23 C | 80 kJ/m² |
| Vicat Softening Temperature 10 N | 140 °C |
| Water Absorption 24h Immersion | 0.3 % |
| Water Absorption Saturation | 1.1 % |
| Coefficient Of Linear Thermal Expansion | 1.2 x 10⁻⁴ / °C |
As an accredited Arkema Rilsan D30 NATURAL PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in a 10 kg moisture-barrier cardboard box, containing Arkema Rilsan D30 natural PA11 powder for laser sintering. |
| Container Loading (20′ FCL) | 20′ FCL: Arkema Rilsan D30 Natural PA11 loaded securely in a full 20-foot container, protected, dry, and stabilized for safe transit. |
| Shipping | Ship as non-hazardous polymer in sealed, moisture-proof packaging to prevent clumping. Avoid heat, humidity, and open flames. Use dry, ventilated transport. Keep containers upright and protected from mechanical damage. No special hazmat required, but ensure proper labeling and documentation for safe handling. |
| Storage | Store Rilsan D30 NATURAL PA11 in its original, sealed container in a cool, dry, well-ventilated area, ideally below 25°C (77°F). Protect from direct sunlight, heat sources, and humidity. Keep the container tightly closed when not in use to prevent moisture absorption. Avoid exposure to oxidizers; use within recommended shelf life. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored unopened, cool, dry, and protected from moisture. |
In automotive fuel vapor return and liquid-fuel transfer systems, Rilsan D30 NATURAL PA11 is evaluated as a neat extrusion layer where hydrocarbon permeation resistance and low-temperature impact durability are required across ethanol-blended gasoline exposure. The compliance framework for this application is anchored to SAE J2260 for fuel fill and vapor tube permeation requirements and SAE J2045 for multilayer fuel line assemblies, while raw-material traceability is verified under ISO 1183 density measurement and ISO 527-1/-2 tensile property determinations. The resin is introduced at 100 wt% virgin loading in the polyamide tie or protective ply; where a UV-stabilised black outer layer is required, a halogen-free carbon black masterbatch is let down at 2.0–3.5 wt% into the D30 base, and regrind, if used at all, is restricted to non-fuel-contact plies at 20 wt% only after full permeation revalidation on the finished tube structure. The downstream production sequence typically consists of multi-layer co-extrusion through a spiral mandrel die on 45–60 mm single-screw extruders with 30:1 L/D ratios and grooved feed sections, preceded by dry-air pre-drying of the PA11 to a moisture content below 0.15%; moisture above this threshold generates hydrolysis-induced viscosity loss and surface splay on the tube bore. Vacuum calibration in water-cooled sizing tanks is followed by optional corrugation for flexible fuel filler and vapor tubes, with in-line laser diameter control and spark testing used to reject pinholes below 0.1 mm equivalent diameter. Terminal finished product types include fuel filler neck assemblies, evaporation canister vapor return lines, fuel tank vent tube bundles, and quick-connect fuel line sets where the PA11 layer contributes low-temperature impact resistance and hydrocarbon barrier function against ethanol-blended fuels.
PA11 D30 NATURAL is processed as the internal pressure sheath of unbonded flexible pipes under qualification requirements of API 17J and ISO 13628-2, with material selection screened through NORSOK M-710 for sour service and rapid gas decompression resistance. In this configuration the formulation is 100 wt% virgin D30; no regrind, recycled trim, or moisture-exposed pellets are introduced into the liner ply because the anisotropic molecular orientation frozen into the extruded tube after vacuum calibration is sensitive to melt contamination, and because gas service qualification tests would be invalidated by non-traceable lot composition. Extrusion is performed on a 90–120 mm single-screw extruder with a barrier screw, screen pack, and gear pump feeding a straight or spiral mandrel die that produces a smooth-bore or rough-bore liner of 6–14 mm wall thickness; melt temperature is maintained in the 240–260 °C band, head pressure is monitored to avoid shear-induced molecular weight reduction, and the tube is cooled gradually through a multi-zone water spray and vacuum path to limit internal voids. The main process conflict in thick-wall extrusion is the competing demand for high melt strength to prevent drawdown against the need to avoid thermo-oxidative yellowing above 270 °C; therefore residence time in the screw and adaptor is held below 10 min, and purging with low-viscosity polyolefin is required if line stoppage exceeds this threshold. Terminal finished forms include smooth-bore static flowline liners, rough-bore dynamic riser liners, gas injection riser pressure sheaths, and water injection riser liners used within subsea oil and gas production systems, where field experience identifies liner collapse during annulus depressurisation as a key validation concern addressed through retained hoop strength after ageing in synthetic formation water at 80 °C.
In heavy-duty vehicle air brake circuits, the material is used in extruded tube stock that must withstand pressure pulses from 0 to 8.6 MPa at temperatures down to −40 °C without bursting or kinking; the governing compliance framework includes SAE J844 and ISO 7628-1 for thermoplastic air brake tubing, with vehicle-level proof and burst test requirements referenced in FMVSS 571.106. The formula is based on 100 parts by weight neat Rilsan D30 NATURAL; a UV-black masterbatch may be introduced at 2–3 wt%, while plasticizers are not added because they would lower the high-temperature hoop stress retention of the unreinforced tube. The production sequence for reinforced air brake harnesses begins with primary tube extrusion on a 60 mm 30:1 single-screw extruder, followed by textile braiding or spiral reinforcement of polyester or aramid yarn directly over the PA11 tube, then outer sheath extrusion of the same D30 material to encapsulate the braid, with in-line laser diameter control and cold water sizing to hold ovality below 0.1 mm on nominal outside diameters of 4–16 mm. Batch-to-batch variation in pellet bulk density can shift extruder output by 1.5–3% on lines without gravimetric hopper control, so feed-throat temperature is limited to 50–60 °C to prevent pellet sticking and surging. Terminal finished product types include coiled nylon air brake harnesses, straight pre-cut push-to-connect tube lengths, and pre-assembled air suspension lines for heavy trucks and trailers.
Railway and offshore control cable jacketing uses Rilsan D30 NATURAL where halogen-free composition and low smoke emission are specified; the qualification matrix for European rolling stock is anchored to EN 50264-1, EN 45545-2 hazard classes R22 and R23, and halogen content verification under IEC 60754-1, while North American transit applications commonly invoke NFPA 130. The jacket compound can be processed at 100 wt% D30 with 2–4 wt% of a halogen-free colour masterbatch, provided that the masterbatch carrier is a PA11 or PA12 base compatible with the melt viscosity of the D30 grade; if the final system requires an enhanced flame-retardant classification beyond the intrinsic hydrocarbon polymer performance, the design is transferred to a specialised flame-retardant PA11 compound instead of post-adding hydrated mineral fillers into neat D30, which would cause melt fracture at the die lip. The cable jacketing process is a pressure-extrusion operation in which a 60–90 mm single-screw extruder with a polyethylene metering screw and screen pack delivers melt through a crosshead die over a preheated conductor assembly; downstream a water trough, air wiper, spark tester, and length encoder complete the line. Published data for the exact D30 NATURAL jacket formulation under all EN 50264-1 test severities is limited, so first-article cable constructions must be tested for flame front propagation and smoke density on the final bundle rather than on plaque specimens. Terminal finished products include low-smoke control cable sheaths, data communication cables for rolling stock, and offshore sensor cable outer jackets where the PA11 layer provides abrasion resistance and chemical resistance to hydraulic fluids.
Industrial and vehicle clutch actuator tube stock is evaluated under DIN 73378 for polyamide tubing in motor vehicles and under SAE J1402 when the finished assembly is incorporated into hydraulic brake hose systems; the PA11 D30 grade is processed as 100 wt% neat resin with regrind of small-bore tube scrap excluded to preserve burst performance in thin-wall sections. The process is a single-screw extrusion of outside diameters from 4 mm to 8 mm with wall thicknesses between 0.5 mm and 1.0 mm; the line may operate with vacuum sizing and a post-extrusion thermal annealing stage at 120–140 °C for 30 min to lock in dimensional stability before cutting and fitting assembly. Because the hydraulic fluid contact layer must resist zinc-based brake fluid decomposition products at peak operating temperatures near 100 °C, the use of external plasticisers is prohibited and only clean antioxidant-stabilised natural resin is fed to the hopper. Terminal finished product types include hydraulic clutch line bundles, industrial actuation tube stock for pneumatic controls, and pre-formed coolant overflow lines where the PA11 resin offers lower moisture uptake than short-chain polyamide alternatives.
In beverage dispensing and industrial water transfer lines, D30 NATURAL is extruded as a smooth-bore tube where the pertinent compliance statements are FDA 21 CFR 177.1500 and EU 10/2011 food-contact plastics legislation, with end-use listing commonly cross-referenced to NSF/ANSI 51 for potable water contact. The formula is 100 wt% unpigmented D30 NATURAL; colour concentrates are avoided unless the masterbatch carries an equivalent food-contact declaration, because post-added pigments can migrate into the fluid stream and invalidate migration testing. Tube production uses a 30–50 mm single-screw extruder with polished internal surfaces, melt filtration at 200 mesh, and vacuum sizing to maintain inside diameter tolerances of ±0.05 mm on tube diameters from 4 mm to 12 mm; downstream annealing at 140 °C stabilises crystallinity and reduces post-molding shrinkage. The main operational boundary is that D30 NATURAL should not be exposed to chlorinated sanitising agents at concentrations above those permitted in the end-use cleaning protocol, because long-term environmental stress cracking data for high-concentration hypochlorite contact are product-design specific and require validation. Finished terminal forms include beverage dispensing tube, CO₂ gas supply lines for soft drink machines, water cooler tubing, and food-contact liquid transfer bundles.
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Arkema Rilsan D30 NATURAL is an unpigmented polyamide 11 (PA11) resin supplied as granules. The polymer backbone is derived from 11-aminoundecanoic acid, which is obtained from castor oil through transesterification, thermal cracking, hydrolysis, and polycondensation. Under ISO 1043-1:2011 the material is designated PA11. Typical published values for the unfilled natural grade include a density of 1.03–1.04 g/cm³ at 23 °C according to ISO 1183-1:2019 and a crystalline melting temperature near 189 °C measured under ISO 11357-3:2018. The resin is intended for extrusion and injection-moulding operations in which an unpigmented polyamide with lower saturated water uptake than PA6 or PA66 is required. Common conversion routes include pneumatic tubing, cable sheathing, flexible hose liners, and light-duty injection-moulded connectors.
Grade differentiation inside the Rilsan PA11 family is controlled mainly by melt-viscosity class, stabiliser loading, and pigmentation rather than by polymer chemistry. D30 NATURAL contains no carbon black or mineral filler, which separates it from black UV-stabilised PA11 grades used in exposed tubing and from glass-fibre-reinforced PA11 grades in which flexural modulus can exceed 2,000 MPa. Relative to PA12, PA11 generally shows a higher crystalline melting point, lower saturated water absorption, and different stress-cracking behaviour in polar fluids, but the selection decision must be made from current grade-specific data because plasticiser content, impact modifier, and filler shift each property independently. Melt mass-flow rate should be established under ISO 1133-1:2022 using a defined reference temperature and load; the D30 designation does not encode a universal melt-viscosity number, and published absolute MFR values for this specific natural configuration are limited. Adjacent Rilsan PA11 grades with P20 or P40 designations are often selected for different tube-extrusion throughputs; end users should conduct a comparative rheology run on the target line rather than rely only on supplier nominal values.
Capillary rheometry of unfilled PA11 reveals pronounced shear thinning above 100 s⁻¹; the exact viscosity curve for D30 NATURAL should be generated under ISO 11443:2021 because residence time and moisture content alter apparent viscosity. On cooling from the melt, PA11 crystallises at approximately 160–170 °C when scanned at 10 K/min, and this transition controls mould cooling time as well as extruder calibration stability. In tube extrusion, a water-bath temperature below 15 °C can quench the surface too rapidly and create an amorphous skin; a bath temperature of 40–60 °C is more effective in permitting spherulitic development and reducing post-extrusion dimensional change. These observations apply broadly to natural PA11 extrusion lines, but no single cooling profile is universally valid across die geometries, haul-off speeds, and tube diameters.
High-humidity conversion of natural PA11 requires pre-drying in a desiccant dryer at 80 °C for 4–6 h when resin has been exposed to ambient relative humidity above 60%; tray drying without dew-point control is not recommended because the equilibrium moisture content may remain above the hydrolysis threshold. The target moisture content before processing is <0.08% by mass. On single-screw extruders with 30:1 to 40:1 L/D barrier screws, barrel settings between 220 °C and 250 °C are typical, but melt temperature alone is insufficient as a control variable: screw speed, back pressure, and die pressure interact with PA11 crystallisation kinetics. Surface roughness appears when the melt is too cold, while bubble formation occurs when moisture remains above the threshold. Injection-moulding conversions should maintain hopper-throat cooling to prevent granule bridging and should limit melt residence time to 6–10 min at the upper processing temperature to reduce oxidative yellowing. The onset of yellowing is more visible in an unpigmented natural grade than in carbon-black counterparts. Published data for the exact residence-time boundary of D30 NATURAL is limited; the sensitivity is a documented field issue across natural PA11 moulding trials.
On production lines, unpigmented PA11 exhibits failures that differ from black PA11 in diagnosis: splay is more easily visible, but yellowing is also interpreted incorrectly as contamination. In injection moulding, gate blush and jetting are controlled by expanding the gate land to 0.8–1.2 mm and using a slow initial injection profile until the melt front fills the gate region. Runner diameters below 4 mm can generate shear heating and local yellowing. A vacuum vent at the metering section on single-screw extruders assists in removing residual moisture; vent-port vacuum is commonly held at 0.08–0.09 MPa below atmospheric for PA11, though line-specific leak-up rates dictate the actual setting. Clamp force requirements are calculated from projected area and flow length; a first estimate of 3–5 kN/cm² is used in many semi-crystalline polyamide moulding shops but must be confirmed by mould-flow simulation and short-shot studies.
Property ranges for natural, unfilled PA11 are summarized below. The values represent the typical envelope for conditioned resin and are not batch-release data for D30 NATURAL; current Arkema technical data sheets remain the controlling reference for purchase specifications.
| Property | Test method | Typical range |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.03–1.04 g/cm³ |
| Melting temperature | ISO 11357-3:2018 | 186–191 °C |
| Tensile stress at yield | ISO 527-1/-2:2012 | 40–45 MPa |
| Tensile elongation at break | ISO 527-1/-2:2012 | >100% |
| Flexural modulus | ISO 178:2019 | 800–1200 MPa |
| Notched Charpy impact, 23 °C | ISO 179-1/1eA | 8–12 kJ/m² |
| Water absorption saturation, 23 °C | ISO 62:2008 | 1.8–2.2% |
Replacing a carbon-black PA11 grade with D30 NATURAL removes a source of opacity but can reduce long-term UV resistance unless a stabiliser package is present. If the component is exposed to direct sunlight, QUV or xenon-arc testing under ISO 4892-2:2013 is required; short-term colour shift is not an acceptable predictor of retained tensile strength. Replacement of glass-filled PA11 with the natural unfilled grade lowers flexural modulus and creep resistance while increasing elongation and flexibility. The unfilled resin is appropriate when the part must follow bending without cracking, but it is not a direct substitute in structural brackets where creep under load is controlled by fibre reinforcement. Substitution of PA12 with PA11 generally modifies the melting point upward and changes fuel-permeation performance; PA11 is used in some multilayer hydrocarbon-carrying tube constructions, but an unfilled natural grade is not a drop-in replacement for a fuel-contact formulation without additional validation. In low-temperature impact testing under ISO 179-1/1eA, conditioned PA11 can retain ductile behaviour below −40 °C, but the operator must verify the exact notched Charpy value for the grade because molecular-weight distribution and crystalline morphology govern the measured result.
Water uptake in PA11 is lower than in PA6 or PA66 because the amide-segment density is reduced by the longer aliphatic chain. Saturation uptake of unfilled natural PA11 in water at 23 °C is typically 1.8–2.2% by mass under ISO 62:2008. In 50% relative humidity air, equilibrium uptake is closer to 0.7–0.9%. Dimensional change follows a Fickian diffusion profile in thin sections; parts subjected to cyclic humidity should be designed with tolerance bands that include moisture-induced expansion. Chemical resistance is observed in non-polar aliphatic hydrocarbons, oils, greases, and many refrigerants at ambient temperature, but the grade is not suitable for continuous exposure to concentrated mineral acids, phenolic solvents, or strong oxidising agents. For load-bearing components in fuel environments, stress-cracking resistance should be evaluated under ISO 22088-2:2006. Batch-to-batch moisture variation is a more frequent dimensional-control variable than resin density, and incoming resin acceptance by Karl Fischer titration with a vaporiser at 160 °C is preferred over loss-on-drying.
Compared with PA6 and PA66, the lower amide-segment density of PA11 reduces saturated moisture uptake and resulting dimensional growth, which is relevant for snap-fit tolerances in outdoor enclosures. Compared with PA12, PA11 exhibits a higher crystalline melting point and generally higher modulus retention at elevated temperature, but the two resins are not interchangeable in every flexible-tube design because plasticiser migration and processing history control the final stiffness. Sliding wear of unfilled PA11 is lower than that of glass-, carbon-, or aramid-modified PA11 under high PV conditions; tribological evaluation should use a defined counterface and ASTM G133 or ASTM D3702 pin-on-disk protocols rather than supplier hardness values alone.
Documentation for food-contact, medical, or automotive specifications must be obtained from Arkema for the specific D30 NATURAL lot and plant. Base PA11 chemistry is often referenced in regulatory inventories; however, a generic statement does not constitute grade-specific compliance. The converter should request the current REACH registration dossier under Regulation (EC) No 1907/2006, and verify the presence or absence of Substances of Very High Concern above 0.1% w/w under Article 33. For electrical and electronic applications, RoHS Recast 2011/65/EU as amended by (EU) 2015/863 restricts cadmium, lead, mercury, hexavalent chromium, PBB, and PBDE, but the natural colourant-free formulation does not by itself guarantee compliance if post-processing additives are used. Bio-based carbon content can be quantified using ASTM D6866 or ISO 16620-2:2019; a renewable-carbon claim must be measured on the exact lot because processing aids may lower the renewable carbon fraction below the theoretical maximum.
| Requirement | Reference standard or regulation | Converter responsibility |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | Verify grade/lot against target rheology window |
| Density | ISO 1183-1:2019 | Incoming resin acceptance |
| Moisture content | Karl Fischer / ISO 15512:2019 | Pre-drying control at <0.08% |
| Tensile and flexural properties | ISO 527-1/-2:2012; ISO 178:2019 | Material qualification on finished part |
| UV ageing | ISO 4892-2:2013 | Validate if exposed to sunlight |
| Food contact | 21 CFR 177.1500; Regulation (EU) No 10/2011 | Obtain grade-specific confirmation |
| RoHS/REACH | 2011/65/EU as amended; Regulation (EC) No 1907/2006 | Confirm post-processing additives do not alter status |
Food-contact evaluations in the United States may be based on 21 CFR 177.1500 for nylon resins; European food-contact use is addressed under Regulation (EU) No 10/2011 with migration limits and simulant protocols. These generic listings do not constitute grade-specific approval. The converter must obtain current product safety documentation from Arkema for the specific D30 NATURAL lot and plant. If a bio-based carbon claim is required, measurement under ASTM D6866 or ISO 16620-2:2019 must be performed on the exact resin lot.
Non-implantable medical device evaluations sometimes begin with unpigmented PA11 because the absence of carbon black removes one class of extractable species. Extraction testing must nevertheless be performed on the finished device under ISO 10993-12:2021, not on raw granules. Steam autoclave sterilisation at 121 °C may reduce molecular weight through hydrolysis; repeated autoclave cycles should be validated by intrinsic viscosity or solution viscosity measurement. Gamma sterilisation can oxidatively discolor natural PA11, and dose validation should include colorimetric and tensile acceptance criteria. For electrical connectors and cable clips, the surface resistivity of natural unfilled PA11 is generally above 10¹³ Ω/square at 23 °C and 50% relative humidity, making the material an insulator; if static dissipation is required, a carbon-black or conductive PA11 grade is necessary. In pneumatic tubing, burst pressure is geometry-dependent and must be calculated from the short-term tensile strength of the conditioned resin with an appropriate safety factor, not from a single pressure rating supplied by the resin producer.
