| HS Code | 141222 |
| Density | 1.02 g/cm³ |
| Melting Point | 190 °C |
| Glass Transition Temperature | 45 °C |
| Tensile Strength At Yield | 52 MPa |
| Elongation At Break | 320 % |
| Tensile Modulus | 1600 MPa |
| Flexural Modulus | 1400 MPa |
| Izod Impact Strength Notched 23 C | 45 kJ/m² |
| Heat Deflection Temperature 1 80 Mpa | 55 °C |
| Water Absorption 24 Hr | 0.3 % |
| Water Absorption Equilibrium | 1.0 % |
| Flammability Rating Ul 94 | V-2 |
As an accredited Suzhou Hipro Polymers Hiprolon 11ESNNHL P20 Nylon, dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg in moisture-proof, polyethylene-lined paper bags, sealed to prevent moisture absorption and labeled with product identification. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Hiprolon 11ESNNHL P20 dry nylon resin, securely palletized and stowed for safe ocean transport. |
| Shipping | Ship Suzhou Hipro Polymers Hiprolon 11ESNNHL P20 Nylon (dry) in sealed, moisture-proof containers to prevent water absorption. Use clean, dry transport with adequate ventilation to avoid dust accumulation. No special hazmat classification required, but secure loads to prevent bag damage. Protect from extreme heat and direct sunlight during transit. |
| Storage | Store Hiprolon 11ESNNHL P20 Nylon in a cool, dry, well-ventilated area, away from direct sunlight and moisture. Keep in its original sealed container to prevent absorption of humidity, which can degrade properties. Avoid extreme heat and open flames; maintain moderate temperatures. Ensure area is clean and free from incompatible chemicals. |
| Shelf Life | Store unopened in a cool, dry place. Shelf life is typically two years from date of manufacture when kept sealed. |
Extruded heavy-duty vehicle air brake tubing manufactured from Hiprolon 11ESNNHL P20 dry resin is run on single-screw extruders with 45 mm or 60 mm barrier screws of 24:1 to 30:1 L/D and compression ratio between 2.5:1 and 3.5:1. Melt temperature is maintained at 220 °C to 245 °C because the plasticizer fraction volatilizes above 250 °C and produces die-lip deposit, while below 210 °C the melt pressure on a 45 mm line rises above 25 MPa and output falls by more than 10%. Pellets are re-dried at 80 °C for 4 h to 6 h in a desiccant dryer with -40 °C dew point after bags have been open longer than 8 h; target residual moisture is below 0.10% by Karl Fischer titration as described in ISO 15512. Vacuum calibration at 0.06 MPa to 0.08 MPa with chilled water at 12 °C to 18 °C controls outside diameter to ±0.05 mm, and puller force is set to avoid longitudinal reversion above 3% in hot-oil testing. Burst qualification follows SAE J844 Type A and ISO 7628:2010, with minimum burst pressure at 23 °C of 2.0 MPa and cold impact at -40 °C; tensile properties are measured by ASTM D638-14. Terminal products are 6 mm to 16 mm outside-diameter air supply tubes for tractor-trailer braking circuits. Production-line data show that package-open moisture excursions above 0.12% raise surface roughness by 15 µm to 20 µm Ra and reduce fitting pull-out force by up to 12% in assembly plant tests. The grade is used in coiled service lines because its long-chain amide structure provides stress-cracking resistance in calcium chloride and sodium chloride road de-icing brines; qualification is still recommended by notched-strip immersion tests before a new fitting geometry is released.
For diesel fuel return and vapour vent line applications, Hiprolon 11ESNNHL P20 dry grade is processed into monolayer or multi-layer tube with outside diameters of 6 mm to 12 mm. Barrel temperatures for a 30:1 L/D three-zone screw run from 190 °C at the feed throat to 230 °C in the metering zone, with a gear pump holding throughput within ±1.5% because wall-thickness changes in the nylon layer directly affect permeation results under SAE J1681 and SAE J2260. The continuous service ceiling in diesel return is not set by oxidative embrittlement but by plasticizer extraction and hydrolysis of amide linkages in the presence of fuel-borne water; for this reason, continuous contact is normally limited to 80 °C, while excursions to 110 °C require a fuel extraction test followed by tensile elongation measurement per ASTM D638-14 to confirm retained elongation above 150%. When evaporative emissions require a barrier layer, the nylon 11 is co-extruded with EVOH or fluoropolymer using a spiral mandrel die and tie layers selected to match melt viscosity within 100 Pa·s at the die-wall shear rate. Published permeation data for this exact P20 monolayer formulation under SAE J1681 is limited; therefore, finished-tube permeation certification is not inferred from resin pellet test data. Terminal components are diesel fuel return lines, evaporative vapour vent tubes, and in-tank diesel pickup tubes.
Flexible offshore production systems use polyamide 11 pressure sheaths for low-gas-oil-ratio flowlines because the polymer retains tensile strength after exposure to produced water containing 5 wt% methanol and dissolved carbon dioxide at 60 °C. The dry pellets are fed to an extruder with a melt pump and crosshead die that deposits a sheath over an interlocked stainless steel carcass; wall thickness from 4 mm to 10 mm is maintained by a draw-down ratio of 1.5:1 to 2.0:1 and two-stage downstream cooling at 40 °C to 60 °C to reduce radial crystallinity gradients. The lower flexural modulus of P20 reduces bending strain during reel lay-up, but it also lowers creep resistance at hydrostatic pressure above 100 bar and increases damage sensitivity under rapid gas decompression when methane saturation exceeds 3 wt%. For high-gas service at design pressures above 150 bar, unplasticized high-viscosity PA11 grades are specified instead. Qualification is performed under API 17J and ISO 13628-2 by aged tensile testing to ISO 527-1/-2 after 1,000 h immersion in a synthetic production fluid at 80 °C. The terminal product is an unbonded flexible riser or water injection flowline pressure sheath operating from -20 °C to 60 °C.
When methanol flushing is part of the subsea operational envelope, hydraulic control lines and chemical injection tubes are jacketed with nylon 11 to resist stress cracking in 50 vol% methanol-water mixtures at 23 °C to 60 °C. The dry resin is extruded on a 38 mm single-screw extruder at 225 °C to 240 °C over individual stainless steel or duplex steel tubes of 9.5 mm to 19.05 mm outside diameter, with a wall of 0.6 mm to 1.5 mm. The main processing defect is post-extrusion shrinkage onto the steel substrate, so the jacketed tube passes through a hot-water quench at 60 °C and an air wipe, followed by ultrasonic concentricity monitoring at ±0.05 mm. Low-temperature brittleness is checked at -40 °C by ISO 974; retained tensile elongation after methanol ageing is measured by ISO 527-1/-2. Because the jacket is not a bonded moisture barrier, continuous service in wet annulus conditions is capped at 70 °C to limit molecular-weight loss to less than 10% over 5,000 h. The terminal product is a subsea control umbilical combining hydraulic lines, chemical injection tubes, and electrical cables.
Railway rolling stock and off-highway machinery cable jackets use the low-temperature ductility of plasticized polyamide 11 to permit installation at -35 °C without stress whitening. The grade is applied as a 0.45 mm to 1.20 mm sheath over insulated conductor bundles with a 60 mm extruder and a 25:1 L/D screw, using a pressure die at 220 °C to 235 °C and a tip-to-land gap of 1.2:1. Fire performance is not delivered by the base polymer alone: where EN 45545-2 R22 or R23 applies, the complete cable must be tested to ISO 4589-2 for oxygen index and ISO 5659-2 for specific optical density, and flame-retardant barriers are used because the unfilled P20 grade is not an FR formulation. Abrasion resistance is characterized by the ISO 6722-1 scrape test, while thermal ageing at 100 °C for 168 h is evaluated as retained tensile elongation by ASTM D638-14. Published data for this specific EN 45545-2 cable configuration is limited, so full-scale fire testing on the finished cable is mandatory. The terminal products are jumper cables and control cable assemblies in rail vehicles and open-cast mining equipment.
For short-diameter industrial pneumatic and low-pressure lubrication tube, Hiprolon 11ESNNHL P20 dry resin is a direct substitute for PA12 flexible tube. The only mandatory preparatory step is re-drying for 4 h at 80 °C when bags have been open longer than 24 h, because moisture above 0.08% produces surface micro-roughness that cuts press-in fitting pull-out force by more than 15%. Extruded tube is annealed through a hot-air tunnel at 140 °C for 5 min to reduce longitudinal shrinkage below 2% after 1,000 h at 90 °C in lubricating oil. Burst strength and fitting retention are checked against DIN 73378 and ISO 14743, with a minimum burst ratio of 3:1 relative to the working pressure.
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Material identification for Suzhou Hipro Polymers Hiprolon 11ESNNHL P20 Nylon, dry proceeds from supplier nomenclature rather than from an assumption of equivalence with any other producer’s resin. The prefix 11 places the grade in the castor-derived polyamide 11 family; the alphanumeric block ESNNHL is consistent with an extrusion-oriented, natural-colour, heat- and light-stabilized formulation, though the supplier’s current code key should be confirmed for the exact additive package; and the suffix P20 follows the PA11 industrial convention for a semi-flexible plasticizer-adjusted rheology in the dry-as-molded condition. The word “dry” is a moisture-state descriptor, not a viscosity classification. As supplied, moisture content is normally controlled below 0.10% by ISO 15512. Exposed to ordinary ambient air, the polyamide 11 backbone equilibrates at approximately 1.5–2.0% water by weight. Independent literature for this precise Hiprolon configuration is limited; the values cited in this document are representative dry-as-molded ranges for industrially equivalent PA11-P20 materials and shall not be read as certified release limits unless verified on the batch certificate.
Dry PA11-P20 differs from unplasticized PA11 principally by a lower tensile modulus and higher low-temperature strain capability. Under ISO 527-1/-2, the tensile modulus of a P20-modified PA11 typically falls between 900 MPa and 1400 MPa; yield stress is normally 28–38 MPa. Plasticizer addition reduces hydrogen-bond density between amide groups. Notched Charpy values measured by ISO 179/1eA at 23°C usually remain above 8 kJ/m², and at -40°C are commonly between 5 kJ/m² and 9 kJ/m². This distinguishes the grade from unmodified PA6, whose dry tensile modulus is approximately 2,800 MPa but whose notched impact at -40°C often falls below 5 kJ/m² unless impact-modified. The dimensional change associated with equilibrium moisture is also lower than PA6; polyamide 11 saturation moisture at 100% relative humidity generally remains below 2.5% in ISO 62 exposure tests.
The table below provides a representative property envelope, not a supplier release specification. The P20 suffix does not identify a melt-viscosity class under ISO 1874-1; the actual melt volume-flow rate must be taken from the supplier’s batch document.
| Property | Test method | Indicative range | Unit |
|---|---|---|---|
| Density | ISO 1183-1 | 1.03–1.05 | g/cm³ |
| Water absorption, 24 h at 23°C | ISO 62 | 0.3–0.4 | % |
| Tensile modulus | ISO 527-1/-2 | 900–1400 | MPa |
| Yield stress | ISO 527-1/-2 | 28–38 | MPa |
| Nominal strain at break | ISO 527-1/-2 | >50 | % |
| Charpy notched impact, 23°C | ISO 179/1eA | 8–15 | kJ/m² |
| Charpy notched impact, -40°C | ISO 179/1eA | 5–9 | kJ/m² |
| Melting temperature | ISO 11357-3 | 175–190 | °C |
| Vicat softening temperature | ISO 306/B50 | 140–160 | °C |
Moisture control is the primary processing boundary. Because the P20 modification can mask early hydrolytic degradation, melt viscosity loss is not a reliable indicator of wet resin. The material should be pre-dried with a desiccant air dryer at 80°C for 4–6 hours when as-received moisture exceeds 0.10%. Drying air dew point should be below -30°C. In hopper-dryer configurations, residence above 8 hours at 80°C can produce plasticizer exudation and bridging; therefore continuous drying should be avoided unless the hopper is sized for immediate consumption.
For injection moulding, melt temperatures from 200°C to 240°C are typical. The upper limit should not exceed 250°C because oxidative degradation and plasticizer volatilization accelerate. Mould temperatures between 30°C and 70°C are required to control post-mould shrinkage and crystalline orientation. On single-screw extrusion lines with L/D ratios from 24:1 to 36:1, barrel settings from 190°C at the feed zone to 230°C at the die are used for tube and cable jackets. Melt temperatures above 260°C cause visible surface defects and dimensional drift in downstream cooling calibrators. For high-speed cable jackets, a general-purpose three-zone polyamide screw with compression ratio 2.5:1–3.0:1 is preferred; higher compression ratios above 3.5:1 can generate shear peaks that drive melt temperature above 250°C and produce striations.
Purging with low-density polyethylene or a commercial polyamide purge grade is recommended at shutdown. Residence time at melt above 15 minutes should be avoided; degradation first appears as progressive yellowing and a reduction in melt strength. Venting is required if upstream re-moisturization exceeds 0.15%, but open vents may also strip volatile plasticizer fractions at high temperatures.
Where low-temperature impact and resistance to stress-cracking in hydrocarbon environments are required, the grade is used in cable jacketing, pneumatic tubing, automotive fuel-vapor lines, and flexible hydraulic conduits. Tubing extruded to wall thickness below 1.0 mm should be sized immediately after the die through a vacuum calibration sleeve held at 20–40°C; line speed is limited by the melt-strength reduction associated with the P20 modification. In blow-moulded and profile applications, the P20 grade requires a lower haul-off tension than unplasticized PA11 because hot-state creep is higher. Automotive tube specimens should be tested for burst pressure retention after 1,000 h at 80°C in an air oven and for low-temperature impact after conditioning at -40°C for 6 h under ISO 7628 or the customer specification. In rail-transit cable sheathing, the limiting factor is usually concentricity rather than melt temperature; thin jackets are processed at 50 m/min or above only when the downstream gauge control can hold wall-thickness variation below 0.05 mm.
Published data for this specific configuration is limited at wall thickness below 0.8 mm; process capability trials are required before stable production. The dry designation must be maintained through the process because moisture above 0.12% generates surface splay and causes diameter fluctuation. An online moisture analyzer or a hot-oil bubble test at 180°C is used to detect free water before startup.
Selection against PA12 or PA612 involves a trade-off between low-temperature toughness, moisture absorption, and chemical resistance. PA12 has a lower density, usually 1.01–1.02 g/cm³, and a melting point near 175–180°C, which favours faster melting and lower energy input. However, the PA11-P20 grade retains a higher renewable carbon content when derived from castor oil and can show lower permeability to aromatic hydrocarbons because of a higher amide group density. The table below compares general dry-as-molded values for these material classes.
| Material class | Density, g/cm³ | Melting range, °C | Saturation moisture, % | Tensile modulus, MPa | Notched Charpy at -40°C, kJ/m² |
|---|---|---|---|---|---|
| Hiprolon 11ESNNHL P20, PA11 plasticized | 1.03–1.05 | 175–190 | 1.6–2.0 | 900–1400 | 5–9 |
| PA12, general-purpose unmodified | 1.01–1.02 | 175–180 | 1.2–1.5 | 1400–1700 | 7–11 |
| PA612, general-purpose unmodified | 1.06–1.08 | 215–220 | 2.0–3.0 | 1700–2000 | 5–8 |
| PA6, unmodified dry | 1.13–1.14 | 220 | 9.0–10.0 | 2700–3000 | 3–5 |
| PA66, unmodified dry | 1.13–1.15 | 255–265 | 7.0–8.0 | 2800–3200 | 3–5 |
In fuel-contact lines, long-term service temperature is normally limited by oxidative resistance rather than hydrolysis; continuous exposure above 120°C requires a heat-stabilized PA11 grade specifically formulated for automotive underhood use. The P20 suffix does not by itself imply fuel-line certification. Any tube or hose must be tested to SAE J844 or ISO 7628 for burst strength, and to SAE J2260 or equivalent for fuel permeation, before release. PA12 may be preferred where moisture-induced dimensional change must be minimized; PA612 may be selected where the heat-deflection requirement is closer to 90°C under load. However, PA612 is less flexible and may require plasticizer or impact modification to match the dry low-temperature Charpy performance of the P20 grade.
Compliance documentation for the product should not be assumed from trade-name similarity alone. The supplier should be required to provide REACH registration evidence, RoHS compliance under 2011/65/EU, and, where food-contact or potable-water service is contemplated, migration testing under EU 10/2011 or FDA 21 CFR 177.1500 specifically for the P20-plasticized grade. The plasticizer used in this product family is not disclosed in all export documentation; its migration rate in hot-air ageing above 100°C is an operational boundary that should be quantified before specifying the material for medical or food-contact assemblies. Avoid prolonged contact with strong aqueous bases and amine-rich coolants above 60°C; polyamide 11 degrades by hydrolysis and stress-cracking under those conditions. The dry designation also imposes a storage boundary: bulk silos and octabins should be sealed and protected from relative humidity above 60% to avoid re-moisturization and the need for re-drying.
