3D Printing InfoWhere it is used
Transparent high-temperature housings, medical trays and hot-water fittings
Sources
- ThermaX PSU Technical Data Sheet v3 · 2026-08 · tds
High-temperature polymers · Material guide
PSU
The entry point to the sulfones at $250/kg: Tg 185-187 °C against PPSU's 230 °C, but 8 % printed elongation against 3 %, so it is markedly less brittle. Only 3DXTech sells it as filament in…
Open in interactive comparisonUnderstand the material
At a glance
Before you print
- Setup difficulty
- Expert / industrial hardware only
- Nozzle wear
- Non-abrasive when unfilled
Read the full material overview
The entry point to the sulfones at $250/kg: Tg 185-187 °C against PPSU's 230 °C, but 8 % printed elongation against 3 %, so it is markedly less brittle. Only 3DXTech sells it as filament in this survey.
Applications
PSU is used for plumbing manifolds, fitting bodies, balancing valves and faucet cartridges, where resistance to hot chlorinated water and low water uptake help preserve function. Syensqo also lists biopharmaceutical connectors, clamps, valves and sensor housings, where strength, transparency and hydrolytic stability are useful. These roles explain why PSU can be chosen even when the greater repeated-steam capability of PPSU is unnecessary.
A different major use is filtration: PSU is solution-processed into hollow-fiber, flat-sheet and tubular membranes for water treatment and dialysis. Solvent processing creates the controlled membrane structure; ordinary FDM does not reproduce that function. For solid mechanical parts, PSU offers a lower thermal ceiling than PPSU and is vulnerable to stress cracking from ketones, esters and aromatic solvents. Cleaning chemistry and sustained hot-water loading can therefore decide whether it suits the component.
Solution-processed filtration membranes ↗
Solution processing; hollow-fiber, flat-sheet or tubular membrane manufacture · Application-specific Udel PSU/sulfone membrane grades; not FDM filtration media · Manufacturer-listed applications
Syensqo identifies hollow-fiber, flat-sheet and tubular sulfone membranes, using solvent processing and hydrolytic stability to create filtration structures for demanding aqueous service.
Sources
- ThermaX PSU Technical Data Sheet v3 · 2026-08 · tds
- TECASON S natural (PSU) — stock shape properties · 2026-08 · tds
- ThermaX PPSU Technical Data Sheet v3 · 2026-08 · tds
Find printable models
Check the model’s material and process notes before choosing a filament.
Plan your printer setup
All print settings ↓Printing quick reference
Representative catalog values. Check the exact grade and its linked conditions before using a setting.
Nozzle temperature (°C)
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Full value & sources
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—Bed temperature (°C)
120–140 (3DXTech)
Enclosure
Actively heated chamber required
Full value & sources
Actively heated chamber required
- Prusament PEI 1010 Technical Datasheet v1.0 · 2024-09 · tds
- Prusament PEI 1010 — material page · 2026-08 · doc
Drying
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Full value & sources
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—Go deeper when you need to
37 documented fieldsProperties & source data
Open a topic to explore the complete data. Each value keeps its original conditions, units and dated sources.
Material & market7 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Base polymer / chemistry | Polysulfone — the lowest-temperature and cheapest of the sulfone family | 1 source
|
| Density (g/cm³) | 1.24 (ISO 1183) | 1 source
|
| Typical price (USD/kg) | 1 kg-equivalent spools cluster near 250 | 1 source
|
| Price range across brands (USD/kg) | 168-250 across formats; 250 g spool $42 (168/kg), 500 g $125 (250/kg) — 3DXTech is the only filament supplier found | 1 source
|
| Market availability (1–5) | Special order, 1–2 makers worldwide | 1 source
|
| Spool sizes & diameters | 1.75 mm; 250 g and 500 g spools | 1 source
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| Typical applications | Transparent high-temperature housings, medical trays and hot-water fittings | 1 source
|
Print settings3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Bed temperature (°C) | 120–140 (3DXTech) | 1 source
|
| Enclosure / chamber requirement (1–5) | Actively heated chamber required | 2 sources
|
| Overall printing difficulty (1–5) | Expert / industrial hardware only | 2 sources
|
Nozzle wear & reliability3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Nozzle hardness required (1–4) | Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm | 1 source
|
| Abrasiveness (1–5) | Non-abrasive when unfilled | 1 source
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| Nozzle clog risk (1–5) | Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 120 °C pre-dry before every print | 1 source
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Moisture & drying2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Equilibrium moisture content at ~50 % RH (%) | 0.30 in 24 h on extruded stock (ASTM D570) | 1 source
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| Effect of moisture on strength | No dry-versus-conditioned figures are published; 3DXTech mandates a 120 °C, 4 h pre-dry before every print because trapped water flashes to steam at these nozzle temperatures | 1 source
|
Strength & mechanical properties10 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Tensile strength (XY) (MPa) | 52 (printed XY, ISO 527, 3DXTech); 81 at break on extruded stock (ASTM D638) | 2 sources
|
| Young's modulus (MPa) | 2100 (printed XY, ISO 527) | 1 source
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| Elongation at break (%) | 8 (printed XY, ISO 527) against 50 on extruded stock — nearly three times PPSU's printed 3 % | 3 sources
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| Flexural strength (MPa) | 87 (printed XY, ISO 178) | 1 source
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| Flexural modulus (MPa) | 2050 (printed XY, ISO 178) | 1 source
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| Other impact data | Izod notched 69 J/m on extruded PSU stock, converted from 1.3 ft-lb/in (ASTM D256) | 1 source
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| Brittleness (1–5) | Moderate | 1 source
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| Hardness (scale-specific) (Shore A / Shore D / Rockwell) | Rockwell M120 on extruded PSU stock (ASTM D785) | 1 source
|
| Creep resistance / sustained load (1–5) | Good. Ensinger lists high creep resistance as a headline property of extruded PSU stock, which is rated to 173 °C heat deflection at 1.8 MPa | 1 source
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| Elasticity / flexibility (1–5) | Rigid | 1 source
|
Heat & temperature6 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| HDT at 0.45 MPa (°C) | 172 (printed XY, ISO 75 at 0.45 MPa, 3DXTech); 181 on extruded stock, converted from 358 °F at 66 psi | 2 sources
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| HDT at 1.8 MPa (°C) | 174 on extruded PSU stock, converted from 345 °F at 264 psi (ASTM D648) | 1 source
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| Glass transition (Tg) (°C) | 187 (DSC, 3DXTech) and 185 on extruded stock (ASTM D3418), against 230 for PPSU | 3 sources
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| Continuous service temperature (°C) | 141 long-term service on extruded PSU stock, converted from 285 °F | 1 source
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| Thermal expansion (CTE) (µm/m·K) | 55.8 (extruded PSU stock, ASTM D696; source states 3.1e-5 in/in/°F) | 1 source
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| Flammability / UL 94 | UL 94 V-0 on extruded PSU stock | 1 source
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Weather & chemical resistance1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Electrical & ESD properties | Surface resistance above 10¹³ ohm/sq — an insulator (IEC 60093) | 1 source
|
Health & safety2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Fume toxicity (1–5) | Moderate — measurable VOCs and UFPs, ventilation advised. None of these polymers was in the chamber study, and all are processed far above the temperatures it covered | |
| Ventilation / filtration requirement (1–5) | Ventilated room or enclosure recommended |
Solvents & solubility3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Soluble in | Chlorinated hydrocarbons — dichloromethane, chloroform — dissolve polysulfone; ketones and esters attack it as well. | |
| Softened or crazed by | Acetone, MEK, ethyl acetate, benzene and toluene craze or stress-crack it; methanol and isopropanol only marginally. | |
| Solvent welding & smoothing agent | Dichloromethane cement welds PSU and NMP softens residual resin. Both are laboratory reagents. |
How to read these values
Values describe representative grades, not every spool. Manufacturer datasheets and independent tests retain their source labels and dates. Printed orientation, test method, conditioning and formulation can change results. Unknown values are —. A listed use is not a certification. Shore A, Shore D and Rockwell hardness are separate scales.
Find a specific filament
1 listingProduct listings and datasheets
Historical USD/kg snapshots. Read each listing’s sale/from qualifiers, spool mass, source date, shipping and tax notes. Product figures are separate from the material summary.
Browse 1 product from 1 brand
3DXTechThermaX PSU168.00 USD/kg
$42.00 / 250 g spool = $168.00/kg; 500 g spool $125.00 ($250/kg), 3dxtech.com product catalogue, Aug 2026
Handle thermax-psu-1. The cheapest of the sulfones.
Open product listing ↗- THERMAX PSU — product page (print recommendations) · 2026-08 · doc
- ThermaX PSU Technical Data Sheet v3 · 2026-08 · tds
| Density (g/cm³) | 1.24 (ISO 1183) |
|
|---|---|---|
| Nozzle temperature (°C) | 360–375 (TDS printed-specimen condition) |
|
| Bed temperature (°C) | 120–140 (TDS printed-specimen condition) |
|
| Tensile strength (XY) (MPa) | 52 (printed XY, ISO 527) |
|
| Young's modulus (MPa) | 2100 (printed XY, ISO 527) |
|
| Elongation at break (%) | 8 (ISO 527) |
|
| Flexural strength (MPa) | 87 (printed XY, ISO 178) |
|
| Flexural modulus (MPa) | 2050 (printed XY, ISO 178) |
|
| HDT at 0.45 MPa (°C) | 172 (ISO 75, 0.45 MPa) |
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| Glass transition (Tg) (°C) | 187 (DSC) |
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| Electrical & ESD properties | Surface resistance >10^13 Ω/sq (IEC 60093) |
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