| HS Code | 213201 |
| Density | 1.08 g/cm³ |
| Water Absorption 24 Hr | 0.3 % |
| Tensile Strength At Break | 50 MPa |
| Elongation At Break | 300 % |
| Flexural Modulus | 500 MPa |
| Izod Impact Notched 23 C | 100 J/m |
| Shore D Hardness | 60 |
| Melting Point | 190 °C |
| Vicat Softening Point | 150 °C |
| Heat Deflection Temperature 0 45 Mpa | 70 °C |
As an accredited Ashley Polymers Ashlene 940H Nylon 11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg moisture-resistant bags, Ashlene 940H Nylon 11 pellets are protected for safe transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL of Ashley Polymers Ashlene 940H Nylon 11: packed in sealed bags, palletized, and securely stowed for safe transport. |
| Shipping | Ashlene 940H Nylon 11 ships as non-hazardous resin pellets in sealed moisture-proof bags or drums. Keep packaging dry, avoid direct sunlight, and store below 50°C. Transport by covered truck, container, or rail is standard. Protect from impact and contamination during loading and unloading. |
| Storage | Store Ashlene 940H Nylon 11 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and ignition sources. Keep containers tightly sealed to prevent moisture absorption, which can affect resin quality. Avoid storage near strong oxidizing agents. Maintain ambient temperatures and protect from physical damage. Proper storage preserves shelf life and processing properties. |
| Shelf Life | Shelf life is typically two years when stored in sealed, dry, cool conditions away from moisture and direct sunlight. |
Five-layer coextrusion lines for low-permeation gasoline fuel tubing routinely use Ashlene 940H Nylon 11 as the outer jacket because its equilibrium moisture uptake at 50% RH remains near 1.8 wt% and its notched impact at −40 °C stays above 8 kJ/m² without plasticizer. The outer layer compound is prepared at 88–93 wt% Ashlene 940H with 1.5–2.5 wt% carbon black masterbatch, 0.3–0.8 wt% copper-free antioxidant masterbatch, and the remainder a viscosity-matched PA11 regrind stream limited to 8 wt%; the adjacent tie layer is not blended into the PA11 melt because maleated polyolefin levels above 0.5 wt% in the PA11 phase raise melt pressure instability and increase gel formation at the die lip. Pellets are desiccant-dried at 80–85 °C for 4–6 h to a target moisture below 0.08 wt%, using a −35 °C dew-point air supply; batch-to-batch variation in surface moisture above 0.12 wt% appears on the extruder as rising melt pressure above 18 MPa and a dull oxidized surface on the tube outer diameter. The line uses a 30:1 L/D single-screw extruder with a barrier screw, melt temperature maintained at 235–250 °C, and a downstream gear pump set to hold die pressure fluctuation below ±0.5 MPa. Multilayer die gaps of 0.60–0.80 mm feed a vacuum sizer at −0.06 to −0.08 MPa, followed by a 120 °C, 2 h annealing step to reduce axial shrinkage below 1.0%. Compliance is verified against SAE J2260 for low-permeation fuel system tubing, SAE J1737 for hydrocarbon loss, and DIN 73379-1 for dimensional and burst characteristics. Terminal parts are multilayer gasoline vapor return lines and fuel feed lines for passenger vehicles, with wall thicknesses of 0.8–1.2 mm and continuous service ratings from −40 °C to 100 °C.
During production of plasticizer-free PA11 pneumatic tubing, vacuum calibration at 0.06–0.08 MPa negative pressure creates a larger surface area for water vapor uptake if the melt contains residual moisture above 0.10 wt%, which shifts outer diameter by 0.15–0.25 mm after 24 h of humidity aging. The compound is run as 100 wt% Ashlene 940H with 0.2–0.5 wt% ethylene bis-stearamide release additive and 0.5–1.0 wt% hindered phenolic/phosphate stabilizer masterbatch; plasticizer is deliberately excluded because low-molecular-weight plasticizer migration condenses in line filters and service air dryers. Extrusion uses a 24:1–30:1 L/D single-screw extruder with a low-shear screw, melt temperature 215–235 °C, and a free-standing melt draw distance of 20–40 mm into a vacuum sizer; closed-loop laser outer-diameter gauging controls diameter to ±0.08 mm at 1.2–2.0 m/min line speed. Post-extrusion conditioning at 85 °C for 2 h stabilizes crystallinity and reduces slow dimensional growth. Burst strength and cold impact are checked to SAE J844 and ISO 7628, with the −40 °C impact test performed after 72 h at 100 °C dry heat to expose antioxidant depletion. Finished goods are air brake tubing for commercial trailers and pneumatic suspension lines, typically 8–16 mm outer diameter and 1.0–2.0 mm wall.
A subsea unbonded flexible pipe riser in sour hydrocarbon service imposes simultaneous dissolved CO₂ and H₂S partial pressures on the thermoplastic pressure sheath; Ashlene 940H is used in unplasticized form at 100 wt% resin content with 0.4–0.8 wt% hindered phenol/phosphite stabilizer and 0.1–0.3 wt% processing aid, because even 2–4 wt% external plasticizer can lower barrier performance and raise plasticizer extraction under ISO 23936-1 sour aging. Pellet moisture is held at or below 0.05 wt% by vacuum drying at 90 °C for 6–8 h; exceeding 0.08 wt% is associated with hydrolysis-induced melt fracture during large-diameter sheath extrusion and a 20–30% loss in aged tensile elongation after 120 °C autoclave exposure. The production process is a grooved-feed single-screw extruder with 33:1 L/D, melt temperature 210–230 °C, and a melt pump that maintains pressure at the annular crosshead die below 22 MPa; the sheath is extruded over the flexible pipe carcass at 5–8 mm thickness and quenched in 20–30 °C water at controlled line speeds of 0.5–1.0 m/min. Compliance is evaluated under API Spec 17J and ISO 13628-2 for unbonded flexible pipe, with sour-service compatibility tested according to ISO 23936-1 mass change and tensile retention criteria. Published data for this specific Ashlene 940H configuration in high-pressure sour gas service is limited; qualification is therefore conducted on each extrusion campaign using ISO 23936-1 coupons. Terminal products include pressure sheaths for water injection risers, subsea CO₂ injection liners, and hydrocarbon production flowlines.
In multi-lumen catheter extrusion, converting Ashlene 940H into precision medical tubing typically requires letting down a barium sulfate masterbatch at 18–25 wt% final filler concentration, rather than direct powder addition, to avoid die plate pressure spikes and loss of melt strength at the lumen mandrel tip. The final compound is 72–80 wt% Ashlene 940H, 18–25 wt% barium sulfate masterbatch, and 1–3 wt% non-blooming slip additive; loadings above 25 wt% produce a measurable drop in tensile elongation at break below 150% and increase die lines at the lumen mandrel tip. Pellets are dried at 80 °C for 4 h to below 0.08 wt% moisture, then processed on a 24:1 L/D medical extruder with a single-flighted screw and melt temperature 205–225 °C; water quench at 10–15 °C freezes the outer diameter, and a draw-down ratio of 2.0–3.0:1 aligns the crystal structure for kink resistance. Post-extrusion annealing at 85 °C for 4 h shrinks the shaft to stable dimensions and reduces residual stress. Biocompatibility is assessed under ISO 10993-5 for cytotoxicity and ISO 10993-10 for skin sensitization, with the raw resin and barium sulfate masterbatch evaluated to USP Class VI extraction limits. Terminal devices are vascular access catheter shafts, diagnostic catheter bodies, and minimally invasive delivery shafts with outer diameters of 0.8–2.0 mm.
Grinding of Ashlene 940H for powder coating produces a particle size distribution with a D50 of 90–110 µm and a maximum retained fraction of 1.0% on a 200 µm sieve; electrostatic spray guns operate at 60–80 kV with a spray distance of 150–250 mm to deposit a 200–400 µm film on preheated or ambient metal. The dry blend is 100 wt% Ashlene 940H powder with 0.1–0.3 wt% fumed silica flow aid and, where pigmentation is specified, 1–3 wt% inorganic pigment; no solvent or plasticizer is present, so cure requires full fusion rather than evaporation. Curing ovens are set at 240–260 °C for 5–10 min after the metal part reaches oven temperature; undercure below 235 °C leaves a delaminated boundary between the substrate and the fused film, while overcure above 270 °C yellows the clear coat and embrittles edges. Fluidized-bed dipping of preheated ware at 260–300 °C builds a 400–600 µm coating in 3–6 s. Food-contact compliance is verified under FDA 21 CFR 177.1500 for polyamide resins and EU Regulation 10/2011 for plastic food-contact materials; coating adhesion is measured by ISO 2409 cross-cut, and thickness by ISO 2178. Terminal finished products are dishwasher basket racks, surgical instrument handles, and industrial pipe fittings requiring chemical-resistant nylon coatings.
For outdoor electrical connector bodies and railway cable harness fasteners, Ashlene 940H is molded using a two-stage screw with 20:1–24:1 L/D, a reverse-taper nozzle, and a mold clamped at 80–120 MPa injection pressure. The resin is dried to below 0.08 wt% moisture, then processed at melt temperature 245–260 °C and mold temperature 30–60 °C; hold pressure is 50–70 MPa with cooling time 15–25 s for 3–5 mm wall sections. The material is used as neat 100 wt% Ashlene 940H with 0.2–0.5 wt% internal release agent, because glass fiber reinforcement reduces the low-temperature notched impact required for cable tie mechanisms at −40 °C. Flammability is evaluated under UL 94 V-2 at the actual thickness of the connector shell, and glow-wire end-product testing is conducted to IEC 60695-2-11 at 650 °C; a 2.0 mm wall must not ignite or must self-extinguish within 30 s to pass typical railway harness requirements. Terminal finished goods are cold-climate electrical connector shells, cable tie wraps for rolling stock harnesses, and ski binding release components.
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Ashley Polymers Ashlene 940H Nylon 11 is an unfilled polyamide 11 supplied as a heat-stabilised, high-viscosity extrusion and injection-moulding grade within the Ashlene series. The PA11 backbone carries fewer amide linkages per unit chain length than PA6 or PA66, which reduces hydrogen-bonding sites and therefore lowers moisture uptake. Unfilled PA11 typically exhibits a density of 1.03–1.05 g/cm³ when measured to ISO 1183-1 and a crystalline melting peak in the range 186–192 °C when determined by ISO 11357-3. The 940H designation is a supplier-grade identifier rather than an ISO classification, and lot-specific melt volume-flow rate, tensile yield stress, and stabiliser concentration should be confirmed against the manufacturer’s certificate of analysis.
The 940H suffix denotes a heat-stabilised PA11 rather than a plasticised flexible PA11. Unplasticised PA11 of this type retains a dry-as-moulded tensile yield stress commonly in the range 40–45 MPa under ISO 527-2, while plasticised PA11 grades can be intentionally brought below 500 MPa in flexural modulus for low-stiffness hose and cable jacketing. The 940H grade is therefore not interchangeable with flexible PA11 compounds that use sulfonamide or ester plasticisers to increase elongation and reduce hardness. Compared with short-chain polyamides, the principal practical differences are lower saturated moisture absorption, lower density, and better retention of dimensional stability after water exposure. General industrial data place saturated moisture uptake of unplasticised PA11 at 1.8–2.2 % under ISO 62 immersion at 23 °C, while PA6 and PA66 typically absorb 8.5–10.5 % and 7.5–9.0 %, respectively. This does not mean that PA11 is a direct structural substitute for glass-filled PA66, where tensile strength can exceed 150 MPa; it is instead selected for the combination of lower water effect, sub-zero ductility, and chemical resistance.
On production-scale single-screw extrusion lines fitted with 24:1–30:1 L/D screws and 2.5:1–3.0:1 compression ratios, Ashlene 940H is processed after desiccant drying at 80–90 °C for 4–6 h to a residual moisture target below 0.1 %. If ambient relative humidity exceeds 60 %, open hoppers and regrind streams become a processing hazard; surface splay, melt-pressure loss, and hydrolytic molecular weight reduction are the typical failure symptoms. Melt temperatures below 230 °C may produce unmelts or melt fracture in a high-viscosity PA11, while sustained temperatures above 280 °C during long residence time can produce yellowing and a permanent reduction in melt strength. For small-diameter tubing, die temperatures are generally held between 240 °C and 260 °C, but the exact zone profile is tooling-dependent.
Fuel-contact and compressed-air components are common application boundaries for Ashlene 940H because the long methylene sequence of PA11 reduces equilibrium fuel absorption relative to PA6. The resin should still be evaluated in the actual production fuel or solvent mixture, not in a reference fluid alone. Immersion testing under ISO 175:2010 or chemical resistance testing under ASTM D543 is required before replacing a short-chain polyamide or a PA12 grade. In fuel vapour service, retained elongation after ageing is often more predictive than dry-room tensile data; conditioning at 60 °C for 1,000 h in fuel blends may be used as an internal screening threshold, but the pass/fail limit is set by the final component specification. For pneumatic circuits, burst-strength calculations must use moisture-conditioned flexural modulus rather than dry-as-moulded data because the conditioned modulus shifts downward after water uptake.
In continuous multi-line tubing extrusion, Ashlene 940H retains melt strength at low moisture but can generate surface roughness if tip and die land temperatures differ by more than 10 °C. When line speeds exceed 80 m/min, closed-loop vacuum sizing with water temperature controlled at 15–25 °C is normally required to prevent inside-wall collapse in small diameters. This is a tooling-specific operating boundary rather than a universal process setting. Published data for this specific configuration is limited, so start-up trials should be run against the die manufacturer’s sizing calculation and not solely against generic PA11 viscosity tables.
| Material | Density to ISO 1183-1 | Saturated water uptake to ISO 62 | Tensile modulus to ISO 527-1/-2 |
|---|---|---|---|
| PA11 unfilled | 1.03–1.05 g/cm³ | 1.8–2.2 % at 23 °C water | 1,000–1,300 MPa |
| PA12 unfilled | 1.01–1.03 g/cm³ | 1.3–1.6 % at 23 °C water | 1,000–1,400 MPa |
| PA6 unfilled | 1.12–1.15 g/cm³ | 8.5–10.5 % at 23 °C water | 2,600–3,400 MPa |
| PA66 unfilled | 1.13–1.16 g/cm³ | 7.5–9.0 % at 23 °C water | 2,800–3,500 MPa |
The above ranges are general industrial data for unfilled, dry-as-moulded or conditioned polyamides and are not a substitute for the Ashlene 940H certificate of analysis. The heat-stabilisation package and molecular weight distribution can move tensile modulus and impact response within the PA11 range. In particular, plasticiser content in flexible PA11 grades can lower tensile modulus below 500 MPa, while dry-as-moulded rigid grades can remain above 1,000 MPa.
For injection moulding of Ashlene 940H, mould temperatures of 40–60 °C are normally specified to prevent a frozen skin from reducing weld-line strength. Setpoints below 30 °C increase the risk of visible flow lines and loss of knit-line integrity in thin-walled closures. Hot-runner manifolds are typically held at 250–270 °C, and needle-shutoff tips should remain above 240 °C because the PA11 crystallisation range is sufficiently close to the melt temperature to cause gate freeze-off in cold sprues. High-viscosity PA11 is shear-sensitive; injection speed should be profiled to avoid excessive shear heating, and screw back-pressure is generally limited to 5–10 bar unless the feed system requires higher pressure for melt homogeneity. Published data for this specific configuration is limited, so mould-filling simulation should be validated with short-shot studies on the actual press.
Compared with a PA12 extrusion grade, PA11 typically exhibits a melting point approximately 10–15 °C higher. That thermal margin can be useful in under-hood fuel lines and hot-air circuits, but it also demands tighter melt-temperature control. Compared with PA6 and PA66, PA11 offers lower density and lower moisture uptake, but at the cost of lower dry tensile strength and lower stiffness. The component geometry therefore dictates whether the substitution is technically sound; a thin-walled structural boss designed for PA66 should not be re-moulded in Ashlene 940H without re-running mechanical analysis because the modulus reduction is significant.
| Framework or standard | Relevance to Ashlene 940H components |
|---|---|
| FDA 21 CFR 177.1500 | Lists nylon resins for food-contact use, subject to end-use conditions and migration testing on the finished article. |
| EU Regulation 10/2011 | Sets overall migration limits and specific migration conditions for plastics in food contact. |
| REACH Regulation (EC) No 1907/2006 | Requires SVHC disclosure and authorisation checks for substances imported or supplied in the European Union. |
| RoHS Directive 2011/65/EU | Restricts lead, mercury, cadmium, hexavalent chromium, and specified flame retardants in electrical and electronic equipment. |
| ISO 175:2010 | Provides a method for immersion testing of plastics in liquid chemicals, relevant for fuel and solvent exposure validation. |
| ASTM D543 | Provides a method for evaluating chemical resistance of plastics, often used in US qualification protocols. |
For components intended for food contact or potable water service, compliance is not automatic from base resin selection. Pigment carriers, processing aids, and regrind content can alter overall migration, and the final article must be tested under the applicable condition-of-use. A REACH statement should be requested from the compound supplier and checked against the actual formulation. RoHS compliance is an assembly-level property; bulk resin analysis alone does not certify the finished connector, tube, or housing. In offshore flexible pipe or riser service, PA11 is sometimes evaluated as a pressure barrier because of its resistance to hydrolysis and methanol exposure, but qualification is specific to the pipe manufacturer’s construction and typically follows API 17J or API RP 17B protocols. Published data for Ashlene 940H in this configuration is limited, and service simulation at temperatures above 80–120 °C in sour gas and water mixtures is required before specification.
Combination of Ashlene 940H with acid-functional flame retardant masterbatches is not recommended unless the additive supplier has validated viscosity retention. Strong acid species can catalyse amide hydrolysis during melt processing, and the resulting molecular weight loss is irreversible. Contact with high-boiling polar solvents at temperatures above 60 °C should be preceded by chemical resistance testing because swelling and stress-cracking behaviour are formulation-dependent. The operational boundary for continuous use is therefore not defined by a single temperature or pressure value; it is established by the combination of fluid composition, thermal cycling, residual stress, and the selected additive package.
