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Expanded Thermoplastic Polyurethane (E-TPU) is a lightweight, durable, and highly elastic foamed material. Produced by expanding TPU with air, it is commonly used for cushioning in footwear, bike saddles, and protective gear due to its excellent damping and rebounding properties. E-TPU boasts high flexibility and is eco-friendly.
Key Aspects of Expanded TPU:
- Properties: E-TPU is soft, elastic, provides good abrasion resistance, and has high bending endurance, often used for shock absorption.
Note: The term "expand TPU" can also refer to the physical deformation or stretching of 3D printed TPU parts.
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Discussions and forums
TPU expanding
Reddit ·
r/3Dprinting
· 2 comments
· 1 year ago
TPU expanding
Reddit ·
r/3Dprinting
· 2 comments
· 1 year ago
TPU / Spool Expansion - General Discussions
Bambu Lab Community Forum ·
1 year ago
TPU / Spool Expansion - General Discussions
Bambu Lab Community Forum ·
1 year ago
Soft TPU - Improve your 3D prints
Ultimaker forum ·
2 years ago
Soft TPU - Improve your 3D prints
Ultimaker forum ·
2 years ago
See more
People also ask
Does TPU expand when heated?
During drying, TPU expands when heated, causing spool deformation. Therefore, the outer width of the spool may increase to approximately 69.4 mm after drying.
TPU 85A&90A printing guide for H2 series - Bambu Lab Wiki
Bambu Lab Wiki
https://wiki.bambulab.com › h2d-tpu-printing-guide
Bambu Lab Wiki
https://wiki.bambulab.com › h2d-tpu-printing-guide
Does the TPU expand after printing?
Industrial manufacturers 3D print with TPU to produce durable parts with rubber-like properties, without the need for casts or molds. It can stretch more than 5x its original shape before failing.
What is TPU 3D Printing & Uses - Markforged
Markforged
https://markforged.com › resources › blog › your-tpu-3d...
Markforged
https://markforged.com › resources › blog › your-tpu-3d...
Web results
Expand tpu print? : r/3Dprinting
Reddit · r/3Dprinting
5 comments · 1 year ago
Reddit · r/3Dprinting
5 comments · 1 year ago
TPU stands for Thermo-elastic PolyUrethane so stretching under heat seems like your best option. Perhaps with a stepped or conical object.Read more
5 answers · Top answer: Great project! Good luck with the answers.. Not the answer you're looking for but did you ...
What Is Expanded Thermoplastic Polyurethane (E-TPU)
Kunsun Polymer Material (Fujian) Co., Ltd
https://www.tpupolymer.com › blog › what-is-expanded-...
Kunsun Polymer Material (Fujian) Co., Ltd
https://www.tpupolymer.com › blog › what-is-expanded-...
Nov 11, 2022 — CO2 blowing agent is impregnated into Soft Segment which results in expansion of TPU. In this process, the original particles can expand to 6-9 ...Read more
TPU Printing Guide
Bambu Lab Wiki
https://wiki.bambulab.com › knowledge-sharing › tpu-...
Bambu Lab Wiki
https://wiki.bambulab.com › knowledge-sharing › tpu-...
TPU is commonly used to print soft and flexible parts, such as phone cases, shoe soles, and toy components. TPU hardness is defined using Shore Hardness. The ...Read more
How to 3D Print TPU Filament: A Step-by-Step Guide
Kingroon 3D
https://kingroon.com › blogs › 3d-print-tpu-filament
Kingroon 3D
https://kingroon.com › blogs › 3d-print-tpu-filament
Sep 29, 2024 — In this guide, we'll cover everything from understanding TPU and its uses to preparing your printer, adjusting slicer settings, troubleshooting common issues, ...Read more
Printing with TPU: Best practices for flexible success
UltiMaker
https://ultimaker.com › learn › printing-with-tpu-best-p...
UltiMaker
https://ultimaker.com › learn › printing-with-tpu-best-p...
Jun 27, 2025 — 1. Use a 3D printer with a direct drive extruder. TPU's flexibility makes it prone to buckling in Bowden-style extruders, where the filament ...Read more
3D printing with flexible TPU: a complete guide
3D actions
https://3dactions.com › blog › 3dprint-tpu-guide
3D actions
https://3dactions.com › blog › 3dprint-tpu-guide
Feb 11, 2025 — Master TPU printing in 7 steps! Avoid stringing, improve layer adhesion, and create strong, flexible prints. Read the guide and optimize ...
First Expandable TPU
Plastics Technology
https://www.ptonline.com › blog › post › first-expandabl...
Plastics Technology
https://www.ptonline.com › blog › post › first-expandabl...
Aug 27, 2013 — BASF Polyurethane, Wyandotte, Mich.,will debut what appears to be the first expandable TPU (E-TPU). Branded Infinergy, it is based on Elastollan ...Read more
Complete Guide to TPU 3D Printing
BigRep
https://bigrep.com › Guides
BigRep
https://bigrep.com › Guides
May 16, 2025 — Components with such walls can be very flexible, but to make them more rigid, it is recommended to increase the thickness to at least 3 mm.Read more