| HS Code | 517929 |
| Density | 1.04 g/cm³ |
| Melting Point | 178 °C |
| Glass Transition Temperature | -20 °C |
| Vicat Softening Point | 70 °C |
| Tensile Strength At Yield | 47 MPa |
| Elongation At Break | 300 % |
| Tensile Modulus | 600 MPa |
| Izod Notched Impact At 23 C | No break |
| Izod Notched Impact At 30 C | 20 kJ/m² |
| Shore D Hardness | 65 |
| Water Absorption At Saturation | 1.6 % |
| Melt Volume Flow Rate 235 C 2 16 Kg | 4 cm³/10 min |
As an accredited Arkema Rilsan BESNO P20 TLO PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsan BESNO P20 TLO PA11 is supplied in 25 kg sealed, moisture-protective bags for safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loading: palletized bags of Arkema Rilsan BESNO P20 TLO PA11, secured and protected from moisture. |
| Shipping | Ship Arkema Rilsan BESNO P20 TLO PA11 as non-hazardous polymer pellets in sealed, moisture-proof packaging. Keep dry, avoid direct sunlight and excessive heat, and prevent exposure to humidity. Use standard freight, warehouse handling, and clean, covered transport to preserve material integrity and prevent contamination or degradation during transit. |
| Storage | Store Arkema Rilsan BESNO P20 TLO PA11 in its original, unopened packaging in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and excessive heat. Keep away from open flames, sparks, and ignition sources. Maintain moderate temperatures and low humidity to prevent clumping or degradation. Use within recommended shelf life. |
| Shelf Life | Shelf life is typically 2 years when stored sealed, cool, and dry, away from moisture and sunlight. |
In mobile machinery hydraulic and pneumatic pilot circuits, the manufacture of SAE J844 Type A air brake tube from Arkema Rilsan BESNO P20 TLO PA11 is specified on single-wall or spiral-reinforced constructions where burst pressure retention after 150°C heat aging and cold impact at −40°C are governing criteria. The resin is dried at 80°C to residual moisture below 0.08% for 4–6 h in a desiccant dryer with −40°C dew point air before entering a 38D single-screw extruder fitted with a barrier screw and gear pump. A formulation of 100 parts by mass BESNO P20 TLO with 2–3 parts carbon black-based UV/heat stabilizer masterbatch and 0.2–0.5 parts external lubricant is used for black air brake tube; for colored control lines, the carbon black masterbatch is replaced by a 2–5 wt% pigment masterbatch carried in PA11. The extrusion temperature profile from hopper to die is maintained at 210–245°C, with melt temperature not exceeding 255°C because PA11 undergoes thermal oxidative chain scission and visible yellowing during extended residence above 260°C. Tube is calibrated in a two-stage vacuum tank at 0.02–0.04 MPa negative pressure and closed-loop laser diameter control within ±0.05 mm. Lot-to-lot melt viscosity variation is monitored by melt pressure before the screen pack; drift outside ±0.5 MPa at constant screw speed indicates moisture carryover or screw wear. Compliance verification includes ISO 7628-2:2010 performance requirements and DIN 73378 dimensional tables for polyamide motor-vehicle tubing. Terminal products include coiled truck air brake lines, pilot-control bundles for off-highway machines, and preformed hydraulic suction return tubes.
For low-pressure diesel fuel return and onboard refueling vapor recovery lines, Rilsan BESNO P20 TLO PA11 is extrusion-coated or coextruded as the hydrocarbon barrier component in constructions validated under SAE J2260 and CARB LEV III evaporative emission limits. In a common coextruded diesel return line, the PA11 inner layer represents 12–18% of total wall thickness, with a maleic anhydride-grafted polyolefin tie layer at 3–6% and an HDPE or PA12 outer jacket at the remaining thickness; for a mono-wall low-pressure vapor return, the system is compounded at 100 parts BESNO P20 TLO with 1.5–2.5 parts processing stabilizer masterbatch and 0.3–0.8 parts slip additive. The downstream process uses a 45D coextrusion line with layer distribution monitored by through-wall ultrasonic thickness gauging at 0.01 mm resolution. Melt temperature for the PA11 layer is kept at 230–245°C; layer-to-layer adhesion is checked under SAE J2260 peel protocols, and the formed tube is pulled through vacuum calibration at 0.03 MPa negative pressure. Terminal assemblies include preformed diesel vapor return tubes with quick connectors, fuel tank vent lines, and underbody vapor recovery tubes. The continuous diesel contact limit is specified at 90°C; sustained exposure above 100°C with acidic biodiesel water residue may accelerate hydrolysis and should be excluded unless dedicated validation data demonstrate an adequate safety margin.
In unbonded flexible riser pressure sheath production for offshore oil and gas service, Arkema Rilsan BESNO P20 TLO PA11 is used only as 100% virgin extrusion material; regrind of the pressure sheath layer is not permitted under the qualification requirements of API Spec 17J and ISO 13628-2:2020 because contaminant-initiated slow crack growth cannot be accepted in long-term dynamic service. The resin is pre-dried to ≤0.06% moisture in a hopper dryer with desiccant bed and −40°C dew point for at least 6 h; a 33:1 L/D single-screw extruder with a 75 mm diameter barrier screw and gear-pump melt delivery is typically used. Barrel temperature set points range from 200°C at the feed throat to 245°C at the metering section, with melt temperature at the die held at 248 ± 3°C; residence time above 250°C is limited to less than 15 min to avoid oxidative chain scission. The sheath is extruded over a stainless steel carcass with wall thickness controlled by a laser-ultrasonic combined gauge to a tolerance of ±0.3 mm. Terminal products include the internal pressure sheath of dynamic risers, static jumpers, and subsea water injection flowlines. Published data for this specific configuration is limited; design codes require long-term sour gas and wet CO₂ aging tests on extruded sheath samples, and PA11 is generally unsuitable for continuous service above 60°C in high-H₂S water-cut streams unless a dedicated qualification program establishes a lower safe operating envelope.
Rail transit cable jacket compounds based on Rilsan BESNO P20 TLO PA11 are processed into thin-wall sheathing under the fire performance pathways of EN 45545-2:2020 and the electrical construction requirements of EN 50264-1:2008. In formulations intended for HL3, 100 parts by mass PA11 is modified with 4–8 parts of an intumescent or phosphinate-based flame retardant masterbatch and 2–3 parts of a high-shear processing aid for thin-wall sheathing; the formulation is adjusted per cable diameter to satisfy EN 50305 vertical flame propagation and EN 61034-2 smoke density criteria. The sheath is applied on a crosshead extruder with pressure tooling, 45D screw length, melt temperature of 250°C, and conductor preheat set to 70°C to reduce shrinkback stress; a first water trough segment at 60–70°C followed by a second trough at 18–24°C controls crystallinity and jacket longitudinal shrinkback below 2% after 1 h at 150°C. Finished products include rolling stock control and signal cables, door drive cables, and screened jumper cables for low-voltage power distribution inside railcars. If the cable construction includes exposed elastomer seals, the sheath design must segregate aromatic process oils from the PA11 layer because oil migration into the jacket can reduce fire performance and reduce low-temperature elongation at break below the EN 60811-506 limit.
In beverage dispensing and purified water transfer lines, BESNO P20 TLO PA11 is extruded as a natural, unpigmented monolayer tube that is assessed against FDA 21 CFR 177.1500 and EU Regulation 10/2011 with migration testing under the intended temperature-time conditions. The resin is processed as 100 parts by mass virgin PA11 with no regrind; an FDA-cleared ester-type processing stabilizer may be added at 0.3–0.5 parts, and the final formulation avoids amine-based additives because residual amines can promote yellowing in contact with chlorinated potable water. Drying at 80°C for 6 h in a closed-loop desiccant dryer to ≤0.08% moisture is standard before entering a 30D single-screw extruder fitted with a polished nitrided screw and static mixer. Melt temperature is limited to 225–240°C, lower than typical PA11 tube extrusion, to preserve low carbonyl formation that can influence organoleptic neutrality. Vacuum calibration with an internal mandrel gives outside diameter tolerance ±0.08 mm and wall thickness tolerance ±0.05 mm. Terminal products include beverage syrup and carbonated water lines, purified water loop tubing for filtration skids, and low-pressure dairy transfer hoses used below 60°C.
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Arkema Rilsan BESNO P20 TLO is a plasticized, medium-viscosity polyamide 11 (PA11) grade supplied in natural color for extrusion and injection molding. The PA11 backbone is synthesized from 11-aminoundecanoic acid derived from castor oil; renewable carbon content may be verified by ASTM D6866, although plasticizer content affects the grade-specific result. Under ISO 1183-1, the density is reported at 1.04 g/cm³, and the melting peak under ISO 11357-3 is near 190 °C. The grade is differentiated from unplasticized PA11 by a lower tensile modulus, with published values near 1,000–1,300 MPa under ISO 527-1/-2, and from PA12 by a higher melting point and PA11-specific hydrocarbon resistance. Specifications for the grade are defined by the certificate of analysis rather than by nominal data sheet values alone.
Moisture content at the feed throat is the principal variable controlling melt quality for BESNO P20 TLO. The grade is dried to residual moisture below 0.15 wt% before processing. Desiccant dryers with a dew point at or below -40 °C, air temperature of 80–90 °C, and residence time of 4–6 h are standard for PA11. If the granulate remains in open transfer lines under high-humidity plant conditions, moisture regain can occur rapidly; closed conveying or hopper-dryer feed systems are specified where ambient relative humidity exceeds 60 %. Residual moisture above 0.15 wt% causes hydrolytic chain scission in the melt, producing splay, surface streaks, and a measurable reduction in notched impact strength. Melt temperatures for extrusion are held at 220–250 °C, with the rear zones maintained slightly below the front zones to control plastication. Thermal-oxidative degradation becomes significant above 250 °C or when residence time exceeds 10 min; nitrogen blanketing or vacuum venting is used for longer cycles.
Because plasticizer content is not a fixed molecular parameter, batch-to-batch variation can shift melt viscosity. Nominal melt-volume flow rate is reported near 20 cm³/10 min at 235 °C and 2.16 kg load under ISO 1133-1. Incoming-lot verification by capillary rheometry or melt-flow test is recommended before start of production because a lot-to-lot shift of ±10 % in melt-volume flow rate can alter tube-wall control and injection packing behavior. Purging between BESNO P20 TLO and other polyamide grades is performed with a low-melt-flow PA purge compound; contamination with PA6 or PA66 can create blend incompatibility and layer delamination in coextrusion. Dedicated drying and closed conveying systems reduce cross-contamination on production lines.
In small-bore tube extrusion, the medium-viscosity melt can exhibit unstable flow at the die when shear rate is increased without a corresponding adjustment in melt temperature. Die-head pressure fluctuation becomes visible as dimensional drift when melt-temperature control is poorer than ±5 °C. The die land length is set between 10:1 and 20:1 relative to the annular gap to damp exit swell and stabilize wall thickness. Vacuum sizing is operated with water at 15–25 °C; cooling water above 40 °C can increase ovality in wall sections below 1.0 mm. Line speed must compensate for the lower tensile modulus of the plasticized grade; excessive downstream draw introduces molecular orientation that can increase longitudinal tensile strength while reducing transverse elongation. Die-lip drool in PA11 extrusion is associated with low-molecular-weight fractions and plasticizer exudation at the die exit; cleaning intervals on production lines may be shorter than for unplasticized PA11. Use of a breaker plate with 60–80 mesh screens and a melt pump reduces pressure pulsation and stabilizes wall thickness.
The grade occupies a position between unplasticized PA11 and PA12 in the balance of stiffness, moisture uptake, and low-temperature behavior. The PA11 amide-group spacing yields lower saturated moisture uptake than PA6 because fewer water molecules are absorbed per unit volume of amorphous phase. The plasticizer in BESNO P20 TLO reduces intermolecular hydrogen bonding, lowering tensile modulus and increasing ductility at sub-zero temperatures. Unplasticized PA11 has higher tensile modulus and heat-deflection temperature but lower notched impact at low temperature. PA12 offers slightly lower water absorption and density but lower melting point, which narrows upper service temperature. PA6 and PA6.6 provide higher modulus and lower cost per unit volume but exhibit larger dimensional swing due to moisture. Table 1 lists representative published ranges across these materials.
Table 1: Representative published property ranges for BESNO P20 TLO and reference polyamides. Values are not specification limits and must be verified against the certificate of analysis.
| Property | BESNO P20 TLO | Unplasticized PA11 | PA12 | PA6 | Test method |
|---|---|---|---|---|---|
| Density | 1.04 g/cm³ | 1.03–1.05 g/cm³ | 1.01–1.02 g/cm³ | 1.13–1.14 g/cm³ | ISO 1183-1 |
| Melting peak | 184–192 °C | 186–194 °C | 172–180 °C | 218–222 °C | ISO 11357-3 |
| Water absorption at saturation, 23 °C | 1.8–2.0 % | 1.8–2.0 % | 1.4–1.6 % | 9.0–10.0 % | ISO 62 |
| Tensile modulus | 1,000–1,300 MPa | 1,400–1,800 MPa | 1,100–1,500 MPa | 2,500–3,200 MPa | ISO 527-1/-2 |
| Charpy notched impact, 23 °C | 6–10 kJ/m² | 5–9 kJ/m² | 5–15 kJ/m² | 4–7 kJ/m² | ISO 179/1eA |
The plasticized PA11 grade is selected where low-temperature ductility is required without switching to PA12. Charpy notched impact at 23 °C is reported near 8 kJ/m² under ISO 179/1eA; at -40 °C, plasticized PA11 grades retain a higher fraction of room-temperature impact than many unplasticized grades. Heat-deflection temperature under 0.45 MPa load by ISO 75-2/B is generally below 120 °C, which bounds continuous structural applications. Compared with PA6 and PA6.6, the PA11 grade absorbs far less water at saturation—1.8–2.0 % versus 9.0–10.0 %—so mechanical properties and dimensions are less sensitive to humidity. Post-mold annealing at 100–120 °C for 2–4 h is applied to improve crystallinity and dimensional stability when service temperatures approach 100 °C.
Chemical resistance of BESNO P20 TLO follows generic PA11 behavior but is modified by plasticizer migration. The grade resists aliphatic hydrocarbons, diesel fuel, many industrial oils, and zinc chloride solutions at ambient temperature. Ketones, strong acids, and high-concentration phenols attack the amide bond and are not recommended. Methanol and ethanol blend fuels increase absorption and accelerate plasticizer extraction; long-term ageing in alcohol-rich fuels can lower glass transition temperature and reduce low-temperature impact. Plasticizer migration becomes measurable at sustained service temperatures above 80–100 °C in fuel-contact multi-layer constructions. Published fuel-permeation data for BESNO P20 TLO in multi-layer constructions is limited; qualification is performed under SAE J1737, SAE J844, or project-defined procedures. The grade is not recommended for continuous immersion in high-alcohol fuels without specific validation.
BESNO P20 TLO is used in flexible monolayer and coextruded tubing for pneumatic, fuel-vapor, and hydraulic applications where dimensional tolerance, low-temperature impact, and hydrocarbon resistance are required. It appears in automotive air-brake tubing evaluated against SAE J844 and in industrial thermoplastic tubing qualified to ISO 7628 or DIN 74324. In offshore service, PA11 is used as a pressure sheath or liner in flexible pipes, and plasticized grades provide installation flexibility without sacrificing the permeation resistance associated with PA11. Published data for this specific grade in deep-water flexible pipe configurations is limited; qualification for such service relies on full-scale tests under API 17J or similar project-specific protocols. In spiral-reinforced hydraulic hose, the PA11 layer is coextruded or jacketed over high-tenacity polyester or aramid braid. Plasticizer content influences the interfacial adhesion and long-term flexibility of the cover; adhesion values and peel strength are tested under ISO 8033 or manufacturer-specific protocols, and grade-specific published adhesion data for BESNO P20 TLO is limited.
For injection molding, the material is processed at melt temperatures from 230 °C to 260 °C and mold temperatures from 40 °C to 80 °C. Higher mold temperatures promote dimensional replication but increase cycle time. Shrinkage in the flow direction ranges from 0.8 % to 1.2 %, with transverse shrinkage of 1.0–1.5 %, depending on wall thickness and holding pressure. Vent depths should be maintained at or below 0.02 mm to avoid flash. Shot size should remain between 50 % and 80 % of the barrel capacity to limit residence time. The hydraulic clamp force requirement is calculated using a cavity-pressure estimate of 30–60 MPa for thin-walled technical parts; published data for this grade in complex multi-cavity tools is limited.
Table 2 summarizes the recommended processing window for BESNO P20 TLO.
| Parameter | Value |
|---|---|
| Pre-drying temperature | 80–90 °C |
| Pre-drying time | 4–6 h |
| Maximum residual moisture | 0.15 wt% |
| Extrusion melt temperature | 220–250 °C |
| Injection melt temperature | 230–260 °C |
| Mold temperature | 40–80 °C |
| Maximum residence time at melt temperature | 10 min |
Although PA11 absorbs less water than PA6, the equilibrium moisture content still affects part geometry. At 23 °C and 50 % RH, PA11 reaches approximately 1.0–1.5 % moisture uptake; at saturation after immersion, uptake reaches 1.8–2.0 %. Dimensional change from dry-as-molded to humid service is generally less than that of PA6 and PA6.6, but it exceeds that of PA12 in saturated environments. Tolerances for extruded tubing must account for this reversible swelling. In precision pneumatic tubes with internal diameter tolerance below ±0.05 mm, the tubing should be conditioned and measured under the same humidity environment as the application; otherwise dimensional acceptance becomes unreliable. Higher crystallinity from annealing reduces the rate and magnitude of moisture-induced dimension change.
Regulatory compliance must be confirmed against the current safety data sheet and product certifications. The PA11 backbone is subject to REACH, and grade-specific statements under FDA 21 CFR, EU 10/2011, or RoHS require explicit certification. Operational boundaries include a processing moisture limit of 0.15 wt%, a maximum melt temperature of 260 °C, and a maximum continuous service temperature near 100 °C in air before oxidative ageing accelerates. Avoid combining the material with amine-based additives that can alter polyamide crystallinity or promote degradation. Zinc chloride solutions from road salt can cause stress cracking in constrained parts; washing and drainage design are therefore part of field failure prevention. The material is not recommended for contact with strong oxidizing acids, phenols, or high-pressure steam without specific validation.
