| HS Code | 270640 |
| Density | 1.03 g/cm³ |
| Melting Point | 189 °C |
| Glass Transition Temperature | 45 °C |
| Tensile Strength | 55 MPa |
| Elongation At Break | 300 % |
| Flexural Modulus | 1300 MPa |
| Notched Izod Impact | 80 J/m |
| Shore Hardness | 72 D |
| Water Absorption 24h | 1.2 % |
| Vicat Softening Temperature | 170 °C |
| Mold Shrinkage | 1.5 % |
As an accredited Arkema Rilsan BESNO P40 TLX PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsan BESNO P40 TLX PA11 is supplied in sealed 25 kg multi-layer paper bags, ensuring moisture protection and safe handling during transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Arkema Rilsan BESNO P40 TLX PA11, palletized, secured, and protected for safe, efficient transport. |
| Shipping | Ship Arkema Rilsan BESNO P40 TLX PA11 in sealed, moisture-proof containers to prevent degradation. Transport at ambient temperature in dry conditions, avoiding humidity and direct sunlight. This material is non-hazardous under standard regulations, but protect from impact and contamination during transit. Ensure containers remain closed until use. |
| Storage | Store Arkema Rilsan BESNO P40 TLX PA11 in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and moisture. Keep containers tightly sealed to prevent water absorption and contamination. Avoid dust generation; use appropriate grounding if handling large quantities. Maintain temperatures below 50°C and separate from strong oxidizers. |
| Shelf Life | Shelf life is typically 2 years when stored unopened in a cool, dry place, protected from moisture and sunlight. |
In automotive evaporative emission and fuel vapor vent-line extrusion, Arkema Rilsan BESNO P40 TLX PA11 is processed as neat resin at 100 wt%; only a UV-stabilized carbon black masterbatch is added at 1–3 wt% when the tubing is routed outside the passenger compartment or along the underbody. The downstream process requires pre-drying at 80–90 °C for 4–6 h in a desiccant dryer delivering −40 °C dew-point air until residual moisture is ≤0.1 wt%; hopper loading on production floors above 60 % RH is closed-loop to prevent rehydration. Extrusion is performed on a single-screw extruder with 30:1–33:1 L/D barrier screw and vacuum vent connected to −0.08 MPa, with barrel zones 200 °C / 220 °C / 240 °C / 235 °C and melt temperature 225–245 °C. Melt temperature above 250 °C causes gel formation and black specks from thermal degradation; below 220 °C the melt pressure at the die becomes unstable and internal surface roughness increases. The melt is filtered through 60/80/100 mesh screen packs to remove undispersed masterbatch agglomerates. Downstream calibration uses a closed-loop vacuum tank at −20 kPa and an ultrasonic wall-thickness gauge; tube is cut to OEM lengths after inkjet marking. Regrind from start-up purging is limited to ≤10 wt% for wall thickness below 1.0 mm. Conformance is assessed to SAE J2260 for low-permeation nonmetallic fuel system tubing and SAE J30 for fuel and oil hose constructions. Terminal finished products include EVAP vent-line assemblies, fuel filler neck vapor return tubes, carbon canister vent conduits, and low-permeation fuel vapor routing lines.
The specification of BESNO P40 TLX for heavy-duty air-brake circuits is driven by the combination of cold-impact ductility and resistance to zinc chloride stress cracking, both of which are verified under SAE J844 and ISO 7628-1. In formulation, the resin is used at 100 phr base polymer with 2–4 wt% carbon black masterbatch for UV and thermal protection; no external plasticizer is required because the TLX pre-plasticized system fixes flexibility outside the mixing step. Regrind from start-up purgings is limited to ≤20 wt% and must be re-dried at 80 °C for 4 h before reintroduction. The extrusion line uses a 24:1–30:1 L/D single-screw machine with a shear-free screw tip and static mixer; melt temperature is held at 230–250 °C, and the die land is dimensioned for 8 mm, 10 mm, or 12 mm OD tubing with wall thickness conforming to SAE J844 Type A and Type B. Vacuum sizing is followed by laser OD gauging with closed-loop correction to ±0.05 mm. Interruptions exceeding 10 min require die purging to prevent carbonized resin deposits at the die lip; the most frequent batch-to-batch failure mode is eccentricity drift caused by screen-pack blinding from regrind fines. Terminal products include tractor service-brake lines, trailer parking-brake lines, air suspension leveling lines, and gladhand connector pigtails.
When an unbonded flexible riser internal pressure sheath is specified for 5,000 psi design pressure and 80 °C produced-water service, the converter processes BESNO P40 TLX as 100 wt% virgin resin; regrind is not introduced into this layer. The polymer is pre-dried in a vacuum dryer at 80 °C for 6–8 h to ≤0.05 wt% residual moisture, because hydrolysis during large-thickness extrusion generates microvoids that reduce collapse resistance. The downstream process uses a large-diameter single-screw extruder with 30:1–35:1 L/D, axially grooved feed section, and melt gear pump; barrel set points are 190 °C / 205 °C / 220 °C / 215 °C, melt temperature is 210–230 °C, and melt pressure before the gear pump is maintained between 15–25 MPa to stabilize wall thickness from 5–12 mm over a steel carcass. Continuous ultrasonic wall-thickness scanning and spark testing at 3–10 kV are used to detect pinholes. Materials qualification follows API 17J, ISO 13628-2, DNVGL-RP-F119, and NORSOK M-630; sour-service compatibility is confirmed by API 17TR2 test data because exposure to free H2S and condensation water can accelerate plasticizer loss and reduce ultimate elongation at the inner surface. For wells with high H2S partial pressures, published data for this specific plasticized PA11 configuration are limited, and the qualification program must include long-term autoclave aging rather than extrapolation from standard flexible-pipe test coupons. Terminal finished products include unbonded flexible risers, subsea flowlines, flexible jumpers, and water-injection lines.
In the extrusion of thin-wall EWIS cable sheathing for rail vehicles, BESNO P40 TLX is charged at 100 wt% with 2–6 wt% color masterbatch and 0.5–1.0 wt% UV stabilizer masterbatch when the cable is exposed in under-car or roof cavities. The jacket compound is not externally plasticized; post-addition of monomeric plasticizer reduces melt strength and causes eccentricity drift in pressure-tooling dies. The sheathing line uses a 25:1–30:1 L/D single-screw extruder with a double-flighted feed section, melt temperature 235–245 °C, and a pressure die with tooling ratio adjusted to produce jacket wall thicknesses from 0.2–0.8 mm at line speeds up to 300 m/min, depending on conductor cross-section. Preheated conductors are processed through a water trough with cascaded temperature stages from 60 °C to 25 °C to minimize shrinkback; online eccentricity is monitored by x-ray gauge with automatic die-centering. Jacket concentricity is held within ±5 % of nominal wall, and the finished cable is spark-tested at 1–3 kV after coiling. Conformance is assessed to EN 50306, EN 50290-2-27, IEC 60754-1/2, and NFPA 130. Where EN 45545-2 R23 HL3 flame-spread and smoke-density limits apply, published data for adding halogen-free flame-retardant masterbatches to this specific grade at loadings above 10 wt% are limited, so the converter may need to select a dedicated flame-retarded PA11 grade instead of modifying BESNO P40 TLX. Terminal products include railway jumper cables, axle sensor cables, inter-car jumper assemblies, and rolling-stock control harness jackets.
Across automated assembly plants and machine tools, 6 mm to 12 mm OD polyamide pneumatic control tubing is extruded from BESNO P40 TLX as 100 phr base resin; a processing aid is added at 1–2 wt% only for thin-wall sections below 1.0 mm to delay melt fracture at high line speed. The resin is pre-dried at 80 °C for 4 h to ≤0.1 wt% moisture and processed on a 24:1 L/D single-screw extruder with general-purpose screw, melt temperature 220–240 °C, and vacuum sizing at −15 kPa to hold concentricity within ±0.05 mm. The primary compliance boundary is ISO 14743 for thermoplastic tubing used in pneumatic fluid power; additional vehicle-mounted pneumatic circuits are evaluated to ISO 7628 and DIN 73378. The material’s low moisture regain relative to PA6 reduces dimensional growth and burst-pressure shift in humid plant air, but continuous operation above 80 °C ambient can cause plasticizer migration to the tube surface and should be confirmed by long-term heat-aging to ISO 188. Terminal products include pneumatic logic lines, air pilot tubes, machine-tool blow-off lines, and compressed-air distribution branches inside control cabinets.
BESNO P40 TLX is extruded as a 100 wt% inner liner in low-pressure hydraulic hose constructions where ester-based or bio-based hydraulic fluids contact standard nitrile compounds and cause plasticizer extraction; no regrind is used below liner wall thickness 0.25 mm because particulate contamination can create pinholes detectable only by high-voltage pin-hole testing. The liner is processed on a 24:1–28:1 L/D extruder fitted with a pin-tip crosshead and melt pump, with barrel zones 200 °C / 220 °C / 235 °C / 230 °C and melt temperature 225–240 °C. The tube is quenched in a 20–30 °C water bath, passed through a vacuum sizer, and then braided with polyester or aramid reinforcement before a polyurethane or polyester elastomer cover is applied in a second pass. The polyamide liner is tested for oil resistance and hose assembly integrity under SAE J517 and ISO 3949; fluid compatibility is validated by immersion in the specified hydraulic fluid at 100 °C for 168 h according to the relevant method in ISO 3949. Terminal finished products include hydraulic return lines, bio-oil transfer hoses, lubrication circuits, and power-steering return hoses.
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Arkema Rilsan BESNO P40 TLX PA11 is a plasticized polyamide 11 extrusion grade derived from 11-aminoundecanoic acid obtained from castor oil. The polyamide 11 repeat unit places one amide carbonyl per 10 methylene groups; this lower amide density reduces equilibrium moisture absorption relative to polyamide 6 and polyamide 66 and yields an aliphatic thermoplastic with lower density than short-chain nylons. The BESNO designation identifies the flexible extrusion series, the P40 suffix indicates a plasticized formulation, and TLX denotes a supplier-specific stabilization and lubrication package for tube and hose tooling. Typical published property windows for this grade include density between 1.03 g/cm³ and 1.05 g/cm³ under ISO 1183-1:2019, melting temperature from 183 °C to 187 °C by ISO 11357-3:2018, and tensile modulus typically 300–500 MPa for the plasticized grade compared with 1,200–1,500 MPa values reported for unplasticized PA11 extrusion grades. The product is specified for pneumatic tubing, compressed-air brake tubing, and low-pressure fluid-transfer lines where low-temperature flexibility, zinc chloride stress-cracking resistance, and dimensional stability under humidity cycling are design requirements.
Because the PA11 backbone is derived from castor oil, biobased carbon content can be verified by ASTM D6866-24; however, the compound includes plasticizer and stabilization additives, so compound-level biobased content should be confirmed from the certificate of analysis. The lower amide density also contributes to low water absorption: equilibrium water uptake for PA11 is commonly reported at 1.8–2.0% under ISO 62:2008, compared with 9.0–9.5% for polyamide 6. This property directly affects dimensional swell and hydrolysis resistance in humid air brake circuits.
The comparative matrix below uses publicly reported typical data for general property ranges. Values should not be treated as specification limits; lot-specific certificate data govern each production campaign.
| Property | Test method | Rilsan BESNO P40 TLX PA11 | PA12 flexible extrusion grade | PA6 unplasticized |
|---|---|---|---|---|
| Density | ISO 1183-1:2019 | 1.03–1.05 g/cm³ | 1.01–1.02 g/cm³ | 1.13–1.15 g/cm³ |
| Melting temperature | ISO 11357-3:2018 | 183–187 °C | 175–180 °C | 220–223 °C |
| Equilibrium water absorption at 23 °C in water | ISO 62:2008 | 1.8–2.0% | 1.4–1.6% | 9.0–9.5% |
| Tensile modulus | ISO 527-1/-2:2012 | 300–500 MPa | 200–400 MPa | 2,800–3,300 MPa |
| Flexural modulus | ISO 178:2019 | 250–450 MPa | 200–400 MPa | 2,300–2,900 MPa |
| Hardness | ISO 868:2003 | 60–70 Shore D | 60–70 Shore D | 77–82 Shore D |
Relative to unplasticized PA11, the plasticized P40 grade shifts tensile and flexural modulus downward and increases elongation at break; this is the intended trade-off for flexible tubing. Relative to PA12 flexible extrusion grades, PA11 retains a higher melting temperature and a bio-based backbone, but PA12 shows lower equilibrium moisture uptake. Relative to PA6, the moisture uptake and stiffness are substantially reduced, but PA6 retains higher strength and dry-heat stiffness. These differences determine the selection boundary: BESNO P40 TLX PA11 is placed where low-temperature impact, low moisture swell, and chemical resistance are more important than high tensile modulus or creep resistance.
For design purposes, the selection between PA11 and PA12 should consider the different melting temperatures and moisture absorption thresholds. PA11 with a melting temperature of 183–187 °C offers a broader thermal margin in underhood air lines than PA12 with 175–180 °C; however, PA12 has a lower saturated moisture uptake and is sometimes specified where maximum dimensional stability in water-saturated conditions is required. In dry environments, both materials are ductile at low temperature, but the final choice is usually governed by the OEM specification rather than by generic polyamide rankings.
Drying of Rilsan BESNO P40 TLX PA11 prior to single-screw extrusion is required to reach a residual moisture level below 0.08% by weight, measured by ISO 15512:2019. A desiccant-bed dryer or vacuum oven set between 80 °C and 90 °C for 4 h to 6 h is sufficient for sealed bags that have been opened for less than 2 h at ambient relative humidity. In plants where relative humidity exceeds 60%, hopper residence time above 4 h without dry-air purge will reintroduce surface moisture and produce intermittent bubble defects at the die. The measured moisture content of the feed should be verified at the throat with a coulometric Karl Fischer extraction method; visual inspection of melt extrudate for ovality is not a substitute for moisture quantification.
A general-purpose three-zone single-screw extruder with L/D between 24:1 and 30:1 and compression ratio between 2.5:1 and 3.5:1 is adequate for this grade. Typical set points are feed throat 50–70 °C, barrel zone 1 210–220 °C, zone 2 225–235 °C, zone 3 235–245 °C, and head/die 220–235 °C; melt temperature measured at the adapter should not exceed 250 °C. Residence time above 245 °C should be kept below 10 min because plasticizer volatility and thermo-oxidative viscosity drift increase with time and temperature. Processors should inspect the die lip for plasticizer film build-up after 8 h shifts; a low-viscosity haze at the die exit indicates either excessive melt temperature or a lot-to-lot plasticizer migration issue.
Screw speed and output should be matched to the tube line speed rather than maximized. For a 25 mm to 40 mm single-screw extruder, melt pressure at the breaker plate is often maintained between 70 bar and 140 bar; excessive pressure indicates under-dried feed or a restrictive screen pack, while low pressure indicates feeding instability or screw wear. Screen packs of 40/60 mesh are sufficient to trap carbonized gels, but finer packs below 100 mesh can raise melt temperature and introduce shear heating in the plasticized melt.
For tubing, vacuum calibration is preferred over pressure calibration because the flexible melt can collapse if internal air pressure is not closely controlled. Water-bath temperature should be staged from 20 °C to 40 °C for slow crystallization; quenching in chilled water below 10 °C may produce residual stresses and reduce burst resistance in downstream hydrostatic testing. Wall-thickness variation should be monitored after a 30 min start-up period with ultrasonic or laser gauging, and dimensions should be recorded against the lot’s ISO 1167-1:2006 burst performance.
Processing PA11 with moisture above 0.10% by weight triggers hydrolysis of the amide linkage at extrusion temperatures. The direct consequence is molecular weight reduction, lower melt strength, poor draw-down stability, and reduced burst pressure in the final tube. On production lines, this condition appears as fine surface blistering, a loss of die swell, dimensional ovality, and pressure fluctuation at the breaker plate. Melt pressure variability exceeding 10% of the target value during a production run is an early indicator of moisture or feed inhomogeneity and should trigger a stop-the-line check of the dryer dew point and hopper purge airflow.
Regrind from post-industrial tube scrap should not be added above 20% without re-drying and mechanical property verification. PA11 exposed overnight at 60% relative humidity can re-absorb enough moisture to require 6–8 h drying at 80 °C before re-extrusion. Unplasticized PA11 regrind should not be combined with the P40 grade unless the blended lot is tested for tensile modulus under ISO 527-1/-2:2012 and low-temperature impact under ISO 179-1:2023, because the addition of stiff, unplasticized polymer can remove the flexibility that defines the P40 product. Published data for all possible regrind ratios in this specific configuration is limited; plant trials with completed tubing hydrostatic tests are recommended.
Batch-to-batch variance in plasticizer content can shift the melt rheology even when moisture is controlled. A torque rheometer or melt flow indexer operated under ISO 1133-1:2022 at 235 °C with 2.16 kg load is a useful incoming check: a change in melt volume-flow rate greater than ±15% from the supplier reference suggests a lot-to-lot variation that should be resolved before extrusion tooling is committed. Published data for this specific product lot is limited; therefore, process validation must rely on certificate-of-analysis values and line trials.
In compressed-air brake tubing manufactured to SAE J844, Rilsan BESNO P40 TLX PA11 is typically extruded into outside diameters from 3.2 mm to 12.7 mm with wall thicknesses set by the dash size and working pressure classification. The standard imposes dimensional tolerance, resistance to zinc chloride stress cracking, low-temperature conditioning, and pressure retention requirements; tube lots are not considered interchangeable unless they meet the same marking and performance schedule. The PA11 grade’s combination of low moisture uptake and flexibility supports consistent assembly with push-to-connect fittings at freezer temperatures; burst testing is normally conducted according to ISO 1167-1:2006 using water or hydraulic oil as the pressurizing fluid.
For fuel and chemical transfer lines, PA11 is selected where resistance to biodiesel, diesel, and road salts is required. The use temperature window is constrained by the plasticized formulation; continuous exposure above 120 °C is not recommended because plasticizer loss and thermo-oxidative embrittlement become measurable. At temperatures below -40 °C, flexibility is retained but fitting insertion force rises, and the tube wall should be designed to avoid stress concentration at barbed connectors. Published data for this specific tubing configuration is limited if the line has an unusual wall ratio; burst pressure should be calculated from hoop stress and verified by short-term hydrostatic testing rather than extrapolated from generic polyamide data.
Tube wall thickness and ovality are not cosmetic defects; they influence hoop stress and failure mode under ISO 1167-1:2006. Extruded tube should be inspected with a two-axis laser gauge after the sizing tank, and the recorded wall-thickness variance should remain below 0.05 mm for outside diameters under 10 mm. In addition, adhesion strength between layers in coextruded PA11 constructions must be verified by burst testing or by differential scanning calorimetry under ISO 11357-3:2018 only if delamination is suspected. Dimensional records should be tied to extruder melt pressure, haul-off speed, and dryer dew point to allow lot traceability in the event of field failure.
| Conformity area | Standard or regulation | Status relevant to BESNO P40 TLX PA11 |
|---|---|---|
| Density and lot traceability | ISO 1183-1:2019 | Incoming quality control; target range 1.03–1.05 g/cm³ |
| Melting temperature | ISO 11357-3:2018 | Differentiates PA11 from PA12 and PA6 |
| Tensile modulus and elongation | ISO 527-1/-2:2012 | Verifies plasticized flexibility |
| Flexural modulus | ISO 178:2019 | Tube stiffness control |
| Water absorption | ISO 62:2008 | Moisture uptake performance |
| Air brake tubing | SAE J844 | Application-specific qualification |
| Internal pressure resistance | ISO 1167-1:2006 | Hydrostatic burst and long-term failure checks |
| Biobased carbon | ASTM D6866-24 | Verifies castor-oil-derived backbone; compound-level additive effects noted |
| Food-contact status | FDA 21 CFR 177.1500 if applicable | Supplier confirmation required for the specific grade and color package |
| EU registration | REACH 1907/2006 | Registration obligations depend on imported article status and region |
