TPA (PEBA) HS (Heat-stabilized grade)
Additive grade
ISO 18064 TPA
Use the heat-stabilized grade with its reinforced antioxidant package to improve retention of the polyether soft segment under long-term ageing at 80–100 °C, with service to 95 °C.
Values for the HS condition
Other TPA (PEBA) grades and fills
TPA (PEBA) is listed in 13 conditions; see the grade overview at TPA (PEBA).
Compare all 13 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
E-TPA | Specify the expanded bead foam at 0.18 density for ultralight running midsoles and impact cushioning, where rebound typically exceeds E-TPU; modulus is only 0.004 GPa. | — | 2 | 130 | 40 Shore A |
SLS powder | — | — | 8 | 200 | 35 Shore D |
HP 3D High Reusability TPA (enabled by Evonik) · MJF powder | A lightweight flexible polyamide elastomer with high rebound and uniform properties for resilient production parts. | — | 10 | 250 | 91 Shore A |
Shore D 55 | Use the medium Shore D 55 level for structural elastic parts, ski boot liners and gear or coupling dampers that need 48 MPa tensile with 500 % elongation. | 15 | 48 | 500 | 55 Shore D |
Bio-based PEBA | Choose the bio-based version built on a castor-oil PA11 hard block for sustainable footwear and consumer goods; renewable carbon is high and mechanicals match standard Shore D 55 material. | 16 | 45 | 500 | 55 Shore D |
UNFDefault Unfilled / Natural | Use the unfilled natural grade as the default for injection molding and extrusion — Shore D 60 with 52 MPa tensile and 430 % elongation suits shoe midsoles, functional parts and tubing. | 20 | 52 | 430 | 60 Shore D |
Shore D 63 | Choose the stiff Shore D 63 level, 0.29 GPa modulus and 24 MPa yield, for high-stiffness resilient sheet and plates and sporting-goods spring elements; elongation drops to 400 %. | 24 | 55 | 400 | 63 Shore D |
HSThis page Heat-stabilized grade | Use the heat-stabilized grade with its reinforced antioxidant package to improve retention of the polyether soft segment under long-term ageing at 80–100 °C, with service to 95 °C. | 24 | 52 | 360 | 63 Shore D |
Shore D 72 | Pick the hardest standard level — Shore D 72, 0.51 GPa modulus, 58 MPa tensile — for racing-shoe carbon-plate liners and high-stiffness elastic hinges; elongation is reduced to 350 %. | 31 | 58 | 350 | 72 Shore D |
Shore D 25 | Pick the softest level, Shore D 25 (≈75–80 Shore A) with 750 % elongation and 0.017 GPa modulus, for high-rebound cushioning, catheter soft tips and flexible films; service temp falls to 65 °C. | — | 34 | 750 | 25 Shore D |
Shore D 35 | Choose Shore D 35 for soft extrusion and blown film — medical tubing, breathable membranes and soft grips — where 700 % elongation matters more than the 70 °C temperature limit. | — | 38 | 700 | 35 Shore D |
Transparent / clear PEBA grade | Use the clear grade for sports eyewear nose pads, transparent upper components and soft-touch transparent overmolding at Shore D 40, 40 MPa tensile and 500 % elongation. | — | 40 | 500 | 40 Shore D |
Shore D 40 | Pick Shore D 40 when rebound and flexibility must be balanced, as in running midsoles, air-retention bladders and hoses; it gives 45 MPa tensile with 640 % elongation. | — | 45 | 640 | 40 Shore D |
What is TPA (PEBA) HS?
TPA (PEBA) HS is TPA (PEBA) in the HS grade — use the heat-stabilized grade with its reinforced antioxidant package to improve retention of the polyether soft segment under long-term ageing at 80–100 °C, with service to 95 °C. TPA (PEBA) HS has a yield strength of 24 MPa (3.48 ksi) and a tensile strength of 52 MPa (7.54 ksi) — weaker than 76% of polymer grades. Elongation at break is 360% and the elastic modulus is 0.29 GPa (0.0421 Msi). TPA (PEBA) HS has a density of 1.01 g/cm³ (0.0365 lb/in³), lighter than 72% of polymer grades. Its glass-transition temperature is -55°C (-67 °F). UNF is the default condition FabDigit quotes; HS is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 360%, better than 85% of polymer grades
- Readily welded — 75/100, better than 82% of polymer grades
- Forms and bends easily — 85/100, better than 81% of polymer grades
Limitations
- Difficult to machine — 25/100, worse than 93% of polymer grades
- High embodied carbon — 7.5 kg CO₂/kg, worse than 79% of polymer grades
- Low strength — 24 MPa (3.48 ksi), worse than 76% of polymer grades
- Absorbs moisture — dry before molding — 0.6%, worse than 75% of polymer grades
TPA (PEBA) HS properties
Typical room-temperature values for TPA (PEBA) HS; 26 are specific to this condition. Other listed values are TPA (PEBA) reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
TPA (PEBA) HS has a density of 1.01 g/cm³ (0.0365 lb/in³), lighter than 72% of polymer grades. Its glass-transition temperature is -55°C (-67 °F).
Mechanical11
TPA (PEBA) HS has a yield strength of 24 MPa (3.48 ksi) and a tensile strength of 52 MPa (7.54 ksi) — weaker than 76% of polymer grades. Elongation at break is 360% and the elastic modulus is 0.29 GPa (0.0421 Msi).
Thermal11
TPA (PEBA) HS is rated for continuous service to 95°C (203 °F). It conducts heat at 0.23 W/m·K (0.133 BTU/hr·ft·°F), better than 65% of polymer grades. Thermal expansion is 150 µm/m·K (83.3 µin/in·°F).
Electrical5
TPA (PEBA) HS is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹⁰ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 56% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of TPA (PEBA) HS takes about 140 MJ of energy and emits 7.5 kg of CO₂ — more than 81% of polymer grades. Typical recycled content is 0%.
Manufacturability8
TPA (PEBA) HS's machinability is poor (25/100, worse than 93% of polymer grades); weldability very good (75/100); formability excellent (85/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with TPA (PEBA) HS
Is TPA (PEBA) easy to machine?
Soft elastomers do not suit conventional cutting. If required, freeze the part and use sharp single-edge tools at high speed and low feed, or cut sheet by waterjet or laser.
Can TPA (PEBA) be welded?
Hot-plate, ultrasonic, HF and hot-gas welding all work. It fuses directly to PA12 and PA11, and overmoulding TPA onto PA substrates gives good bond strength.
Can TPA (PEBA) be formed, bent or molded?
Dry 4-6 h at 80 °C to below 0.05 % moisture before moulding; melt 220-260 °C, mould 20-50 °C. It can also be extruded into tube and film, blown into film, rotomoulded, or bead-foamed with supercritical CO2 or N2.
What surface finishes work on TPA (PEBA)?
Plasma or corona treatment improves ink and adhesive adhesion; use PU or polyamide-based inks and adhesives. Not platable; colour is normally achieved with masterbatch.
TPA (PEBA) chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| polyamide 12 (PA12) hard blockPA11 in some bio-based grades; ratio sets Shore D hardness | 40 – 75 | 60 |
| antioxidant / process stabilizerphenolic plus phosphite blend | 0.1 – 1 | 0.4 |
| polyether soft block (PTMEG / PEG)PTMEG low water uptake; PEG hydrophilic, antistatic, breathable | ≥ 25 (balance) | — |
TPA (PEBA) HS — frequently asked
What is TPA (PEBA) HS used for?
TPA (PEBA) HS is typically used for running shoe midsoles, 3D-printed lattice cushioning, ski boots, sports equipment and flexible medical catheters. In short: highest energy return elastomer; lowest density in the family; flexible at low temperature.
What is the yield strength of TPA (PEBA) HS?
TPA (PEBA) HS has a typical yield strength of 24 MPa (3.48 ksi) and a tensile strength of 52 MPa (7.54 ksi) — weaker than 76% of polymer grades. Strength varies by condition: see the 13 listed tempers.
Is TPA (PEBA) HS easy to machine?
Not especially — machinability is rated poor (25/100, worse than 93% of polymer grades). Soft elastomers do not suit conventional cutting. If required, freeze the part and use sharp single-edge tools at high speed and low feed, or cut sheet by waterjet or laser.
Can TPA (PEBA) HS be welded?
Yes — weldability is rated very good (75/100). Hot-plate, ultrasonic, HF and hot-gas welding all work. It fuses directly to PA12 and PA11, and overmoulding TPA onto PA substrates gives good bond strength.
What surface finishes work on TPA (PEBA) HS?
Plasma or corona treatment improves ink and adhesive adhesion; use PU or polyamide-based inks and adhesives. Not platable; colour is normally achieved with masterbatch.
Can TPA (PEBA) HS be formed, bent or molded?
Dry 4-6 h at 80 °C to below 0.05 % moisture before moulding; melt 220-260 °C, mould 20-50 °C. It can also be extruded into tube and film, blown into film, rotomoulded, or bead-foamed with supercritical CO2 or N2.
What is the maximum service temperature of TPA (PEBA) HS?
TPA (PEBA) HS is rated for continuous use to about 95°C (203 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between TPA (PEBA) UNF and TPA (PEBA) SD72?
UNF is the default condition — use the unfilled natural grade as the default for injection molding and extrusion — Shore D 60 with 52 MPa tensile and 430 % elongation suits shoe midsoles, functional parts and tubing. SD72: pick the hardest standard level — Shore D 72, 0.51 GPa modulus, 58 MPa tensile — for racing-shoe carbon-plate liners and high-stiffness elastic hinges; elongation is reduced to 350 %. Yield strength is 20 MPa in UNF versus 31 MPa in SD72.
Sources
- ISO 18064 Thermoplastic elastomers — Nomenclature and abbreviated terms (TPA) — ISO (2014)
- Pebax® / Pebax® Rnew® / Pebax® Clear — Arkema (2023)
- VESTAMID® E — Evonik (2022)
- Grilflex® ELG — EMS-GRIVORY (2021)
- HP 3D High Reusability TPA (enabled by Evonik) — Technical Data Sheet — HP (2021)
- CAMPUS Plastics — TPA/PEBA (ISO 10350) — CWFG / CAMPUS (2024)
- EOS PrimePart ST (PEBA 2301) — Technical Data Sheet — EOS
- HP HP 3D High Reusability TPA (enabled by Evonik) — Technical Data Sheet — HP (2021)
- Engineered Materials Handbook Vol.2: Engineering Plastics — Thermoplastic Elastomers — ASM International (1988)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.