Printing and finishing TPU footwear components
Identify whether you are working with TPU film, a moulded component or a textile construction containing TPU. The surface and the finished component determine which preparation and printing system to evaluate.
| Application stage | Product options | What to confirm |
|---|---|---|
| Surface cleaning | SQ-316 | Cleaning for PU and TPU surfaces. Describe any oil, release residue or existing finish. |
| Surface treatment | SQ-31 | TPU treatment agent. Review pretreatment with the selected ink or coating. |
| Colour printing | 7ST / HTPU printing ink | 7ST is solvent-based; HTPU is water-based. Identify the printing ink rather than an HTPU coating or clear finish. |
| Coating and finish | TPU / HTPU coating categories | Specify spraying or another coating process separately from screen printing. |
Low-temperature flex needs a separate review
A Yunrui technical case records cracking with 7ST on a demanding substrate during low-temperature flex evaluation. The case considers 37H low-temperature ink and a water-based route as alternatives for testing.
These are trial options. Confirm the required temperature, test method and finished construction before selecting a grade. Test both the printed component and the assembled shoe where relevant.
Read the ink-cracking guideApplication questions
Does every TPU component use the same preparation?
No. TPU film, moulded parts and textile constructions can need different preparation. Send the actual surface finish and material sample for review.
Can I use the ink selection for a bonding application?
A printing trial does not establish adhesive suitability. For bonding, send both materials and your assembly process so the adhesive and treatment can be evaluated together.
Plan your TPU application trial
Share your material, current process and required result. Our factory team in China will review the product series, technical documents and sample arrangements with you.