| HS Code | 804717 |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Vicat Softening Temperature | 140 °C |
| Tensile Strength | 35 MPa |
| Elongation At Break | 200% |
| Flexural Modulus | 900 MPa |
| Notched Charpy Impact Strength | 12 kJ/m² |
| Shore Hardness | 62 D |
| Water Absorption 24h | 0.2% |
| Volume Resistivity | 1e12 Ω·cm |
As an accredited Evonik Vestamid L2123 Plasticized Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg moisture-protective bags, Evonik Vestamid L2123 plasticized nylon 12 granules ready for processing. |
| Container Loading (20′ FCL) | 20' FCL loading of Evonik Vestamid L2123 plasticized nylon 12, packed in palletized bags, secured for safe transport. |
| Shipping | Evonik Vestamid L2123 Plasticized Nylon 12 ships as non-hazardous polymer pellets. Use clean, dry packaging to prevent moisture absorption and contamination. Avoid heat sources, direct sunlight, and heavy impact during transit. Standard road, rail, sea, or air freight is acceptable when protected from humidity and maintained below recommended storage temperatures. |
| Storage | Store Vestamid L2123 in its original, tightly sealed packaging in a cool, dry area. Protect from moisture, direct sunlight, and UV exposure. Keep away from heat sources and excessive humidity. Ideal storage temperature is below 30°C. Ensure good ventilation to prevent condensation and maintain material quality before processing. |
| Shelf Life | Store in original sealed packaging, dry and cool. Shelf life is typically 2 years from date of manufacture. |
Vestamid L2123 is a plasticized polyamide 12 grade in which the plasticizer component modifies low-temperature impact response but also reduces creep resistance relative to unplasticized PA12. The processing safety boundary is defined by a moisture target below 0.1 wt% after drying at 80±5°C for 4–6 h whenever the material has been stored at ambient relative humidity above 55%. The following application scenarios are separated by die configuration, test standard, additive let-down ratio, and end-article class. Where a monolayer fuel-contact layer is specified, regrind is not introduced unless the converter has completed the burst and permeation validation required by the relevant OEM material specification.
In automotive evaporative emission systems, L2123 is extruded as a monolayer vapor return line or as the inner liner in a coextruded construction in which the outer layer provides abrasion resistance and the tie layer provides adhesion. Industry compliance is anchored to SAE J2260 for nonmetallic fuel system tubing, with fuel resistance tested according to SAE J2260 and evaporative emission targets referenced to EPA 40 CFR Part 86.1811 where applicable. The formulation addition ratio for the fuel-contact layer is 100 wt% L2123; post-industrial regrind is limited to 10–15 wt% and is introduced only in a non-fuel-contact outer layer because recyclate in the inner layer has been associated with gel particle formation and a measurable drop in pressure retention after fuel aging. Production is conducted on a three-layer coextrusion line using 45 mm single-screw extruders with L/D 30:1 barrier screws, barrel set points from 210°C to 240°C, and a spiral mandrel die held at 230–245°C. Pre-drying at 80±5°C to ≤0.1 wt% moisture is mandatory; melt temperatures above 260°C should be avoided because plasticizer loss increases with residence time and causes surface tack in the calibration sleeve. Vacuum calibration at −0.2 to −0.6 bar sets outside diameter, and a final thermal conditioning step at 120°C for 30 min is used on some lines to reduce post-extrusion shrinkage. Published permeation data for L2123 specifically in ethanol-blended fuel is limited, and production validation through differential pressure rise measurement is required for alcohol fuel blends above 10 vol% ethanol. The finished article set consists of fuel filler neck vapor lines, EVAP canister purge lines, diesel fuel return lines for heavy-duty engines, and small engine fuel vapor routing tubes.
Dimensional accuracy in industrial pneumatic control circuits is fixed by the barb profile of push-in fittings, and the polyamide tube must combine a low bending radius with resistance to zinc chloride and common machine-oil aerosols. L2123 is run at 100% or with 2.0–3.0 wt% color concentrate in a single-screw extruder with a grooved feed throat, L/D 25:1 barrier screw, and compression ratio 2.4:1. The governing dimensional and fitting compatibility standard is ISO 14743 for push-in fittings and thermoplastic tube ends, while REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU as amended by (EU) 2015/863 apply for general industrial articles. Pre-drying at 80±5°C for 4–6 h to ≤0.1 wt% moisture is required before the resin reaches the feed section. Barrel set points typically run 210/220/230/240°C with die temperature 235–250°C, and the molten tube is calibrated in a closed-loop vacuum tank at −0.3 to −0.6 bar. A laser diameter gauge controls OD within ±0.08 mm for tubes in the 4–16 mm OD range; batch-to-batch variation in plasticizer level is monitored by capillary melt flow testing according to ISO 1133-1 at 235°C and 2.16 kg, although the melt viscosity curve is shear-dependent. The production failure to watch is sharkskin at drawdown ratios above 2.0:1 when the die land is shorter than 10 times the final wall thickness. End-article forms include polyamide tube for push-in fittings, coiled lengths in 25 m and 50 m reels, robot dress-pack air supply lines, and panel-building control lines.
Hydraulic return lines for mobile equipment use a thin PA12 inner tube, an aramid or polyester braid reinforcement, and a flexible cover compound that must resist oil swell and cold flex. L2123 is used as the cover layer when the cover must remain intact after impulse cycles at 60°C and at bend radii below 4 times the hose diameter. The applicable product standards are SAE 100R18 for thermoplastic hydraulic hose and ISO 18752 for hose grades by impulse performance, with burst testing conducted under ISO 1402 at 24°C. The cover formulation uses 1.0–2.0 wt% carbon black masterbatch for UV and oil resistance, with no regrind when the part is printed with manufacturer traceability and maximum working pressure marks. The production line is a crosshead die arrangement in which the cover is pressure-extruded at 230–250°C over the braid at line speeds from 8 m/min to 18 m/min, followed by air quench at 40–60°C. Pre-drying and a moisture target of ≤0.1 wt% are maintained to prevent surface porosity at the cover–braid interface. The operational limitation is that plasticized PA12 cover stock is not rated for continuous service above 80°C in hydrocarbon environments where the plasticizer may migrate and increase hardness. Terminal products include SAE 100R18 low-pressure hydraulic return hoses, test-bench hose assemblies, construction equipment pilot lines, and agricultural hydraulic control hoses.
Cable jacket compounds for moving machine parts are selected for torsional stiffness and flexural fatigue rather than tensile strength, and unplasticized polyamide 12 is often too stiff for small bend radii in energy chains. L2123 is pressure-extruded directly over stranded conductors at a wall thickness of 2.0–3.0 mm on a 45 mm single-screw extruder with L/D 25:1, barrel profile 215/225/235/245°C, and a tubing die held at 240–255°C. The jacket compound is blended with 1.5–2.5 wt% carbon black concentrate for UV stabilization and 0.5–1.0 wt% processing stabilizer masterbatch when edge trim is reintroduced; regrind from clean production waste is capped at 10 wt% and only after the cable has passed cold bending at −25°C according to IEC 60811-504. Industry compliance references IEC 60332-1-2 for vertical flame propagation and IEC 60754-1 for halogen acid gas generation, both of which are cable design tests rather than raw material classifications. The standard grade is halogen-free but is not marketed as a flame-retardant compound; flame and smoke performance must be provided by cable construction or a co-extruded flame-retardant layer. After the extruder, the jacketed core passes through a 40–60°C water trough, an inline spark tester at 3 kV AC, and a laser diameter gauge that controls cable OD within ±0.15 mm. The resulting cable constructions include high-flex industrial control cables, trailing cables in cable carriers, robotic dress pack sheaths, and elevator traveling cable jackets.
On high-speed vacuum corrugators, protective conduit is formed by extruding a thin-walled tube into a moving mold block system where vacuum and pressure set the profile pitch and root diameter. L2123 is used in this process when the wall thickness after forming remains above 0.45 mm and the outside diameter is in the 10–32 mm range. Compliance follows IEC 61386-1 and IEC 61386-24 for conduit systems used in electrical installations, with additional conformity to REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU as amended by (EU) 2015/863. The formulation addition ratio is 2.0–3.0 wt% color or carbon black masterbatch and 0.3–0.5 wt% external processing aid to reduce sharkskin at drawdown ratios from 2.5:1 to 4.0:1; regrind from start-up scrap is limited to 15 wt% and excluded when the conduit must meet a notched impact test at −30°C. The extruder line uses a 38 mm single-screw extruder with L/D 30:1, melt temperature 220–240°C, and a vacuum calibration/corrugator block set to −0.4 to −0.7 bar depending on the profile pitch. Pre-drying at 80±5°C to ≤0.1 wt% moisture is necessary because surface moisture causes pinholes at the corrugation root where drawdown is highest. The manufactured article range covers automotive engine compartment harness conduits, machine tool protective conduits, solar cable protection tubes, and industrial cable routing ducts.
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Evonik Vestamid L2123 is a plasticized polyamide 12 (PA12) compound supplied in cylindrical granulate form for extrusion-dominated conversion. The base polymer is a laurolactam-derived semicrystalline polyamide; the incorporated plasticizer reduces tensile modulus and Shore hardness while retaining the aliphatic-chain characteristics that give PA12 lower equilibrium moisture uptake than PA6 and PA66. Saturation water absorption for PA12 at 23 °C in water is approximately 1.5 % by mass, compared with approximately 9.5 % for PA6 and 8.5 % for PA66 under similar immersion conditions. This lower uptake reduces dimensional movement and hydrolysis risk in humid or wet service, but it does not eliminate the need for pre-drying before melt conversion. Incoming granulate should be stored in sealed moisture-barrier packaging because plasticized PA12 can acquire surface moisture during warehouse exposure at relative humidity above 60 %. The grade is identified in supplier documentation for flexible tubing, hose sheathing, cable protection, and industrial pneumatic lines where PA12 chemical resistance and low-temperature ductility are design requirements. Lot-to-lot variance in plasticizer content and melt viscosity is controlled through the supplier certificate of analysis; converters should request lot-specific melt volume-flow rate and moisture data before setting barrel profiles or screw speeds.
The primary difference from unplasticised PA12 is the suppression of tensile and flexural moduli. Unplasticised PA12 grades typically exhibit tensile modulus between 1400 and 1700 MPa under ISO 527-1/-2 conditioning, whereas L2123 datasheet ranges typically lie near 450 to 700 MPa. This reduction of approximately 60 % is achieved without crosslinking or copolymerization; the plasticizer is dispersed within the amorphous regions and lowers resistance to segmental motion. The accompanying loss in hardness and compressive creep resistance means the grade is not specified for load-bearing static parts. In contrast, glass-fiber-reinforced PA12 grades can exceed 3000 MPa in tensile modulus but lose the flexibility required for coiled tubing. Shorter-chain polyamides such as PA6 and PA66 have higher amide-group density, greater hygroscopic expansion, and higher melting points. PA6 melts near 220 °C; PA66 melts near 260 °C; L2123 melting is normally in the 170–176 °C range. The lower melt temperature reduces energy input during extrusion but also narrows the gap between processing temperature and hot-air service limits. Within the same supplier portfolio, unplasticized PA12 grades are preferred for semi-rigid tubing and mechanical parts requiring higher creep resistance. Polyamide 11 derived from 11-aminoundecanoic acid has a melting point near 189 °C and is also used in flexible tubing; L2123 offers a lower melt temperature but requires tighter hot-service validation.
The following ranges derive from supplier typical property documentation and ISO test methods; they are not lot-release limits. Single-point values vary with residual moisture, plasticizer dosage, and specimen conditioning.
| Parameter | Standard | Typical range |
|---|---|---|
| Density at 23 °C | ISO 1183-1 | 1.01–1.03 g/cm³ |
| Melting peak temperature | ISO 11357-1/-3 | 170–176 °C |
| Melt volume-flow rate at 250 °C / 2.16 kg | ISO 1133-1 | 8–15 cm³/10 min |
| Tensile modulus | ISO 527-1/-2 | 450–700 MPa |
| Yield stress | ISO 527-1/-2 | 20–28 MPa |
| Nominal strain at break | ISO 527-1/-2 | ≥200 % |
| Charpy notched impact at 23 °C | ISO 179-1/1eA | ≥80 kJ/m² or no break |
| Charpy notched impact at −30 °C | ISO 179-1/1eA | 15–35 kJ/m² |
| Shore D hardness | ISO 868 | 60–70 |
| Vicat softening temperature, Method A50 | ISO 306 | 140–155 °C |
Pre-drying is required before compounding, extrusion, or moulding because residual moisture above 0.10 % by mass hydrolyzes the polyamide at melt temperature. A dry-air dryer with a dew point below −30 °C and an inlet air temperature of 80 °C for 4 h to 6 h is normally adequate to bring granulate to this level. Drying systems with a dew point above −20 °C cannot reliably reduce granulate to 0.10 % within 4 h; the desiccant bed must be regenerated before processing. Hopper residence time should not exceed 8 h if the drying temperature is raised above 90 °C, because surface oxidation and plasticizer loss may occur. Moisture content should be verified by Karl Fischer titration or a calibrated moisture analyzer; a loss-on-drying value alone can be distorted by volatile plasticizer components. Processors should also avoid repeated opening of bulk containers in humid production halls because re-adsorption at 60–80 % relative humidity can return granulate to an unprocessable state within 2 h depending on air velocity.
On single-screw extrusion lines producing pneumatic tube with outside diameters from 6 mm to 12 mm, barrel temperatures are typically set from 200 °C in the feed zone to 230 °C in the metering zone, with the die head held at 220 °C. A general-purpose three-zone screw with an L/D ratio of 25:1 to 30:1 and compression ratio of 2.5:1 to 3.0:1 is accepted for this grade. High-shear barrier screws may raise melt temperature above 260 °C at screw speeds above 80 min⁻¹; such conditions increase the probability of plasticizer volatilization, melt fracture, and brown specks. Practical melt-temperature control is tighter than barrel set points imply. If the actual melt stream falls below 215 °C, unmelted resin pockets can create surface roughness; above 260 °C, plasticizer volatilization and yellowing accelerate. The difference between these limits is approximately 45 K. An infrared melt-temperature probe is preferred over thermocouple readings because shear heating in a deep-flight barrier screw can raise actual temperature by 5 K to 15 K above the barrel set point. Downstream calibration uses closed-loop vacuum sizing with water temperature between 20 °C and 40 °C. Quench water below 20 °C can induce surface haze and higher residual stress in thick-walled profiles. Because the plasticized melt exhibits pronounced die swell and melt memory, a draw-down ratio from 1.05:1 to 1.20:1 is commonly used to preserve wall-thickness concentricity. Regrind from start-up and spooling scrap can be re-fed at 15 % to 20 % by mass if it is dried to the same moisture specification and free of oil contamination; higher regrind fractions can reduce melt strength and degrade surface finish.
Injection moulding of fittings and connectors in the same grade uses melt temperatures from 230 °C to 260 °C, mould temperatures of 40 °C to 80 °C, and injection pressures of 80 to 120 MPa. Hold pressure is set at 50–60 % of injection pressure and maintained until gate freeze. Non-return valve leakage combined with residual moisture above 0.10 % produces splay, jetting, and weak weld lines; the screw cushion should be maintained between 3 mm and 6 mm to reduce shot-weight variation. Mould release agents based on mineral oil are unnecessary and can interfere with later bonding or printing operations.
Flexible tubing for heavy-duty vehicle air brake systems imposes simultaneous low-temperature impact, burst-pressure, and kink-resistance requirements. Finished tubes are often qualified under SAE J844 or ISO 7628 procedures that condition specimens at −40 °C before impact and require room-temperature burst verification. The plasticizer in L2123 shifts the ductile-to-brittle transition downward, but the exact transition for a given lot depends on wall thickness and conditioning history. Thin-wall tube below 1.0 mm may embrittle at a higher temperature than thick-wall tube because the stress state at the notch tip is not relaxed by surrounding material. Burst-pressure verification is geometric as well as material-dependent; thin-wall cylinder stress is proportional to internal pressure and radius and inversely proportional to wall thickness. Designers commonly apply a hoop-stress limit below the yield stress range of the resin, with a service factor of 3 to 4 against measured burst. Kink resistance is not governed by a single ISO standard; bend radius at which the flow area collapses is measured on production tubing using a variable-radius fixture. Published kink-radius data for L2123 as a function of wall thickness is limited, so converter trials are required before design freeze. Under dynamic flexing, heat generation in the tube wall can accelerate plasticizer migration; bend radii below 3 times tube outside diameter should be validated under end-use temperature and vibration.
Plasticizer retention is a service boundary rather than a processing inconvenience. In prolonged contact with hot oils, fuels, or organic extractants, low-molecular-weight additives can migrate from the polyamide matrix into the contact medium. The resulting surface may become tacky, and low-temperature ductility may decline even though the base polyamide remains chemically resistant. Gravimetric extraction tests according to ISO 175 or ASTM D543 should be conducted on finished parts before approval for continuous immersion. For diesel, gasoline, and many mineral-oil-based hydraulic fluids at temperatures below 60 °C, PA12 tubing is generally resistant. Biodiesel and alcohol blends may extract plasticizer more rapidly; methanol and other highly polar solvents can also attack the polyamide backbone at elevated temperature. Concentrated sulfuric acid, formic acid, and oxidizing media are incompatible. Zinc chloride solutions can induce environmental stress cracking in polyamides at temperatures above 50 °C when tensile stress is present; clips, fasteners, and cleaning agents should be reviewed for chloride residues. Continuous hot-air exposure above 100 °C accelerates plasticizer loss and oxidative embrittlement, so room-temperature elongation values must not be extrapolated to under-hood or autoclave service. If a part is specified for repeated steam sterilization, an unplasticized or stabilizer-modified grade may be more suitable unless extractable and mechanical performance are revalidated on the finished article.
Compliance with global standards cannot be inferred solely from the resin type. The processor must obtain lot-specific certificates of analysis covering moisture, melt volume-flow rate, density, and tensile modulus. Within the European Union, the grade is subject to REACH registration obligations; the plasticizer system must be checked against the current Candidate List of substances of very high concern for Article 33 communication duties. Under the RoHS Directive 2011/65/EU, unreinforced PA12 without flame retardant does not intentionally contain lead, mercury, cadmium, hexavalent chromium, or the listed brominated flame retardants, but analytical confirmation on the final component is lot-dependent. For food-contact articles, 21 CFR 177.1500 or Regulation (EU) No 10/2011 conditions apply; migration testing of the plasticizer and processing aids is required because the base-polymer listing does not automatically cover compounded additives. Automotive customers usually require IMDS entries and PPAP documentation, with declared substance thresholds often below 0.1 % by mass. If regrind is used, the compliance declaration must state the maximum regrind content and confirm that no post-industrial contamination occurred.
During part qualification, tensile bars and impact specimens of virgin granulate and a 20 % regrind blend are compared according to ISO 527-1/-2 and ISO 179-1/1eA. If the notched impact at −30 °C falls below the lower bound of the virgin lot, the regrind ratio is reduced or the reclaimed material is re-extruded to homogenize plasticizer distribution. Dimensional stability after conditioning at 70 °C and 62 % relative humidity for 168 h can be assessed using ISO 1110; moisture-induced growth is lower than PA6 and PA66, but the plasticizer increases creep under sustained clamp loads compared with unmodified PA12. Snap-fit and interference-fit designs therefore require larger deflection or metallic retention elements to maintain contact force over repeated thermal cycles. For applications with sustained pressure above 1.0 MPa and temperature above 80 °C, creep testing of the finished tube or fitting is necessary; tensile yield data alone do not predict long-term dimensional change.
