| HS Code | 510253 |
| Density | 1.01 g/cm³ |
| Melting Point | 174 °C |
| Vicat Softening Temperature | 115 °C |
| Shore D Hardness | 62 |
| Tensile Modulus | 330 MPa |
| Tensile Strength At Break | 38 MPa |
| Elongation At Break | 250% |
| Charpy Impact Strength At 23 C | No break |
| Charpy Impact Strength At 30 C | No break |
| Water Absorption After 24h At 23 C | 0.4% |
| Water Absorption At Saturation | 1.4% |
| Melt Volume Flow Rate | 8 cm³/10 min |
As an accredited Evonik VESTAMID® E62-S1 Nylon 12 Elastomer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik VESTAMID E62-S1 Nylon 12 Elastomer is supplied as pellets in 25 kg polyethylene bags, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | 20′ FCL: palletized 25-kg bags, shrink-wrapped and secured, ensuring safe transport of VESTAMID® E62-S1 Nylon 12 Elastomer. |
| Shipping | VESTAMID® E62-S1 is shipped as moisture-resistant sealed bags or drums to preserve purity. Store in a cool, dry area away from heat and direct sunlight. Standard ground, air, or ocean freight is acceptable with proper labeling. Ensure containers are kept upright to prevent damage during transit. |
| Storage | Store Evonik VESTAMID® E62-S1 Nylon 12 Elastomer in its original, sealed container in a cool, dry, well-ventilated area. Protect from direct sunlight, heat sources, and moisture, as nylon absorbs humidity. Keep away from oxidizing agents. Under proper conditions, shelf life is typically two years. |
| Shelf Life | Store dry, cool, and sealed in original packaging. Shelf life is typically two years from date of delivery. |
Commercial vehicle pneumatic circuits in trailer and straight-truck platforms require tube walls that retain burst strength after exposure to compressor oil aerosols and −40°C cold-soak conditions. VESTAMID® E62-S1 is a PA12 elastomer with nominal Shore D hardness of 62 per ISO 868:2003. The material is extruded as a neat resin with 2.0–2.5 wt% carbon black masterbatch incorporated for ultraviolet stabilization; the masterbatch carrier is PA12 homopolymer to avoid phase incompatibility. Pre-drying at 80°C in a desiccant dryer to <0.10 wt% moisture is mandatory before extrusion; moisture content is verified by ISO 15512 Method B. Lot-specific MFR is measured according to ISO 1133-1:2022 at 235°C/5 kg to set melt pump speed and calibrate haul-off. A single-screw extruder with 25:1 L/D, barrier screw, and melt temperature profile 210–235°C feeds a vacuum calibration tank; the vacuum level is maintained at 0.2–0.4 bar below atmosphere to hold wall thickness tolerance. Residual moisture above 0.12 wt% produces hydrolysis-induced viscosity reduction and internal microvoids at the sizing sleeve. Compliance testing follows SAE J844 for nonmetallic air brake tubing, including cold impact at −40°C and burst pressure at 3× rated working pressure. Terminal forms are coiled trailer air brake lines and straight chassis pneumatic lines.
Catheter shaft manufacturing for minimally invasive delivery systems uses VESTAMID® E62-S1 in neat form for transparent or translucent shafts and in filled form where fluoroscopic visibility is specified. When barium sulfate is compounded at 10–20 wt%, radiopacity is sufficient for ring-free shaft visualization under standard fluoroscopy, but the increase in melt viscosity shifts the shear-thinning onset to lower apparent shear rates and promotes die-lip deposition on 16:1–24:1 L/D single-screw extrusion lines. Barium sulfate is dried at 120°C for 4 h before compounding to avoid moisture-induced hydrolysis. Published data for the exact rheological shift above 20 wt% in this specific grade is limited; processors typically cap BaSO₄ at 20 wt% to avoid weld-line strength loss in multi-lumen tips. Downstream processing is multi-lumen tubing extrusion with melt pump, melt temperature 210–230°C, and air cooling before braiding. Wire braiding over the shaft is followed by a heating die at 165–175°C to fuse the jacket layer into the braid interstices. Biocompatibility validation for the finished device is conducted under ISO 10993-1:2018, with cytotoxicity testing according to ISO 10993-5; USP<88> Class VI testing applies to the finished device, not to the raw resin alone. Terminal products include introducer sheaths and delivery catheter shafts.
Halogen-free jacketing compounds for continuous-flex industrial cables are reformulated with VESTAMID® E62-S1 because the PA12 elastomer block reduces low-temperature flexural modulus without introducing plasticizer migration. The formulation uses 20–40 wt% VESTAMID® E62-S1 let down into PA12 homopolymer, with 3–5 wt% hindered phenol/phosphate stabilizer masterbatch; the elastomer addition ratio determines −40°C cold-bend performance and torsional fatigue resistance. Cable jacket extrusion is performed on a 30:1 L/D single-screw line with pressure tooling, melt temperature 215–240°C, and an air gap of 1.5–2.5 m before a water trough to control surface gloss and shrinkback. Draw ratio is kept between 1.05–1.15; above 1.20 the jacket exhibits orientation-induced shrinkage during thermal cycling. Shrinkback after 1 h at 150°C is held below 1.5% for drag-chain cable qualification. Compliance for halogen-free behavior is tested according to IEC 60754-1/2 for acid gas evolution and pH; low-temperature bending is assessed under IEC 60811-504. Terminal products are drag-chain cables and torsionally flexible robot dress-pack cables.
For push-to-connect pneumatic circuits on valve manifolds and maintenance units, wall thickness consistency of extruded thermoplastic tubing is the controlling quality parameter. VESTAMID® E62-S1 is processed without impact modifier or plasticizer; when line speeds exceed 150 m/min, 0.2–0.5 wt% external lubricant masterbatch is added to reduce die-lip friction and maintain inside-diameter roundness. Extrusion is carried out on a 24:1–30:1 L/D single-screw line, with vacuum sizing and an in-line laser micrometer controlling outer diameter to ±0.05 mm. Inside-diameter ovality is maintained below 0.03 mm by controlling melt temperature to ±2°C. Hydrostatic pressure validation follows ISO 1402, with burst pressure at 3× rated working pressure at 60°C. The tube is supplied to interface with push-in connectors validated under ISO 14743:2004. Terminal forms include valve manifold jumpers, pneumatic automation lines, and maintenance unit supply tubes.
Two-shot injection molding for snowsport boot systems uses VESTAMID® E62-S1 as the flex-zone overmold on glass-filled PA12 or PA6 structural shells. The elastomer layer constitutes 30–50 wt% of the finished component mass, with the lower end used for narrow high-stiffness highback ribs and the upper end for cuff flex panels. Pre-drying at 80°C for 6 h is required only at ambient relative humidity above 60%; below that threshold the material processes with acceptable surface finish in closed-loop dryers. Injection molding uses a clamp force of 1,000–1,500 kN, barrel temperatures 210–240°C, and mold temperatures 30–50°C; sub-30°C mold temperatures produce flow hesitation lines at the overmold boundary. The processing window for overmold adhesion is narrow: melt temperature variation should not exceed ±3°C, because lower temperatures reduce interlayer diffusion, while higher temperatures cause substrate deformation. Hold pressure is set to 60–80% of peak injection pressure, with cooling time 20–35 s depending on overmold thickness. Shrinkage differences between the elastomer and the glass-filled substrate are compensated with 0.5–1.2 mm overmold thickness variation. Regulatory compliance for the finished consumer article is evaluated under REACH Regulation (EC) No 1907/2006 Annex XVII and, where electronic accessories are embedded, RoHS Directive 2011/65/EU. Terminal products include ski boot cuffs, snowboard binding highbacks, and winter hiking binding components.
| Application Sector | Standard/Designation | Test Method/Clause | Acceptance Criteria |
|---|---|---|---|
| Commercial vehicle air brake tubing | SAE J844 | Cold impact at −40°C; burst at 3× rated working pressure | No fracture; no leakage |
| Catheter shaft final device | ISO 10993-1:2018; USP<88> | Cytotoxicity per ISO 10993-5 | Device-specific biological evaluation |
| Halogen-free dynamic cable jacket | IEC 60754-1/2; IEC 60811-504 | Low-temperature bend at −40°C | No cracks; pH per IEC 60754-2 |
| Pneumatic push-to-connect tubing | ISO 14743:2004; ISO 1402 | Hydrostatic burst at 60°C | 3× rated pressure |
| Snowsport overmolded components | REACH 1907/2006 Annex XVII; RoHS 2011/65/EU | Annex XVII restricted substances; lead/mercury/cadmium | Below legal thresholds |
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VESTAMID E62-S1 is an unfilled polyether block amide (PEBA) thermoplastic elastomer supplied by Evonik in which polyamide 12 hard segments are chemically linked to polyether soft segments. The product designation encodes a nominal Shore D hardness of 62 when measured to ISO 868; the S1 suffix differentiates the stabilization package and melt flow characteristics within the VESTAMID E series. Published supplier data list a density of 1.01 g cm⁻³ under ISO 1183-1, a dry-state tensile modulus near 400 MPa under ISO 527-1/-2, and a nominal tensile strain at break above 300% when tested under the same method. Differential scanning calorimetry reports a melting range of approximately 165–175 °C (ISO 11357-3). Saturation water uptake is typically below 1.5 wt%, which is lower than many short-chain polyamide elastomers and contributes to dimensional stability in humid service.
The block copolymer architecture creates microphase separation between crystalline polyamide 12 domains and amorphous polyether domains. The polyamide 12 hard segments provide load-bearing capacity, melting point, and resistance to non-polar fluids; the polyether soft segments provide recovery, low-temperature flexibility, and reduced flexural modulus. Because the soft phase is covalently bound, the property profile does not depend on external plasticizer migration. On production-scale compounding lines, melt viscosity is governed by hard segment concentration and polyether block length rather than by plasticizer level, which removes progressive hardening associated with volatile plasticizer loss.
Rheologically, the unfilled PEBA melt exhibits pronounced shear thinning. Supplier technical data commonly report a melt volume-flow rate in the range of 4–6 cm³/10 min at 230 °C and 5 kg load (ISO 1133-1:2022). This flow class permits injection moulding of parts with wall thicknesses down to 1.0 mm when gate geometry is optimised. The grade is less suited to extrusion blow moulding at high draw ratios because parison sag can occur when melt strength is insufficient. In thin-wall moulds, the combination of shear thinning and hard-segment crystallisation creates a narrow gate-freeze window; gate diameter should be at least 50% of the nominal wall thickness to prevent premature gate freeze and sink marks.
Relative to an unplasticized polyamide 12 homopolymer, E62-S1 shows a flexural modulus approximately two to three times lower and retains notched impact behaviour that remains non-brittle at temperatures below -40 °C (ISO 179-1/1eA). The penalty is a lower heat-deflection temperature and lower surface hardness. Compared with softer PEBA grades such as VESTAMID E40-S3, the E62-S1 designation gives higher Shore D hardness (62 versus 40), higher tensile modulus, and improved creep resistance, but reduced elongation at break and lower compliance. The grade is therefore selected when a component requires elastomeric recovery but also a higher resistance to deformation under constant load. In comparison with plasticized polyamide 12 compounds, E62-S1 prevents the gradual increase in stiffness caused by external plasticizer migration into contact media; extraction tests under ISO 175 are used to confirm this behaviour for specific fluids.
Compared with polyamide 11 elastomers, E62-S1 typically shows lower saturation water uptake and similar low-temperature flexibility but differs in crystallisation rate and surface energy. Compared with polyester-based TPU, the polyamide 12 hard phase provides better hydrolytic stability and lower density, while tear strength measured by the trouser method (ISO 34-1) is usually lower than high-hardness TPU. These differences direct material selection for cable jackets and pneumatic tubing where moisture regain, dimensional stability, and low-temperature impact are controlling criteria.
Pre-drying in a dehumidifying dryer at 80 °C for 4–6 h to a residual moisture content below 0.10 wt% (ISO 15512) is required before melt processing. Hydrolytic chain scission accelerates at melt temperatures above 240 °C when moisture is not controlled; surface defects, weld-line weakness, and loss of tensile strain at break are observed on injection moulding machines with 18:1–22:1 L/D screws. Hopper residence times above 8 h at drying temperature can cause superficial oxidation and yellowing. In high-humidity plants, exposed pellets may re-absorb moisture within 2–4 h; closed-loop drying systems with a dew point below -30 °C are preferred.
The practical barrel-temperature window extends from 200 °C to 240 °C. Below 200 °C, incomplete melting of the polyamide 12 hard segments leads to flow instability, poor knit-line strength, and surface defects in multi-gate tools. Above 250 °C, oxidative chain scission of the polyether soft segments becomes significant; production experience on 25 mm diameter screws indicates that melt residence times above 15 min at melt temperatures above 250 °C can reduce tensile strain at break by more than 50%. Screw speeds above 150 rpm can generate shear heating of 10–20 °C, particularly in small-diameter barrels, so melt-temperature measurement with an immersion probe is preferred over barrel set-point control. Mould temperatures between 20 °C and 60 °C control crystallisation rate; lower mould temperatures reduce cycle time but may freeze internal stresses in thick sections.
Weld-line strength is governed by hard-segment crystallisation. In moulds with multiple gates, insufficient venting or low melt temperature produces visible weld lines with strength retention below 50% of the parent material. Raising mould temperature to 50–60 °C and reducing injection velocity improves molecular diffusion across the weld plane. For thin-wall components, higher mould temperatures and low injection velocities are used to avoid jetting and gas entrapment. Back pressure should be maintained in the range of 5–10 bar to ensure homogeneous melt temperature without excessive screw shear.
Profile and tubing extrusion on single-screw extruders with 24:1–30:1 L/D barrier screws is used for flexible pneumatic tubing, cable sheathing, and hose liners. Melt pumps are frequently installed to damp pressure pulsation; drawdown ratios are limited by the high elongational viscosity of the material. In cable jackets, low-temperature impact is assessed by notched Charpy testing at -40 °C (ISO 179-1/1eA), where the grade generally shows no break, although results depend on specimen conditioning and moisture content. Hardness and abrasion resistance are evaluated under ISO 868 and ISO 4649-A respectively. Outdoor cable sheathing typically contains carbon black masterbatch at 2.0–2.5 wt%; this improves UV stability but changes dielectric properties and must be specified separately from the natural grade.
PA12-based PEBA grades are specified for seals, gaskets, fuel-line components, and damping elements because the polyamide 12 backbone resists aliphatic hydrocarbons, diesel, and many oils, while the polyether phase retains sealing force at low temperature. In comparative immersion testing, plasticized polyamide 12 may undergo mass loss and surface tack from plasticizer extraction in fuel; E62-S1 does not show this extraction mechanism because the flexible phase is covalently bound. The material is not recommended for continuous contact with strong acids, oxidizing media, or high-polarity solvents such as lower alcohols and ketones. Published data for E62-S1 in aggressive chemical media is limited; end-use testing under ISO 175 should be performed for any fluid-contact application. In dynamic seals, compression set after 24 h at 70 °C is typically reported in the range of 30–40% under ISO 815-1; this value is higher than softer PEBA grades and must be accounted for in design.
Regulatory compliance is grade- and colour-dependent. Natural unfilled E62-S1 may be suitable for food-contact articles under FDA 21 CFR 177.1500 provided migration limits are satisfied; EU food-contact status is evaluated under Regulation (EU) No 10/2011. The unfilled grade is normally supplied with declarations for Directive 2011/65/EU Annex II and Regulation (EC) No 1907/2006. Medical applications require cytotoxicity and sensitization testing under ISO 10993-5 and ISO 10993-10; published data for E62-S1 in long-term implantable or blood-contact applications is limited.
| Requirement | Standard or Regulation | End-Use Qualification Basis |
|---|---|---|
| Food-contact polyamide 12 resin | FDA 21 CFR 177.1500 | Migration limits apply; natural grades only. |
| EU food-contact plastic | Regulation (EU) No 10/2011 | Specific migration limits for polyamide oligomers must be verified. |
| Hazardous substances restriction | Directive 2011/65/EU Annex II | Unfilled grade typically conforms; verify supplier certificate. |
| Chemical inventory | Regulation (EC) No 1907/2006 | REACH registration required for EU supply. |
Continuous load-bearing service above 100 °C is not recommended because the polyether phase softens and flexural modulus declines. Natural grade exposure to outdoor weathering is limited without carbon black or UV stabilizer addition. Drying, melt-temperature control, and end-use chemical testing are the principal operational boundaries for this grade.
