TPU Sew-On Button for Caps — Specification, Uses and Sourcing Notes
TPU Sew-On Button for Caps: Specification, Uses and Sourcing Notes
TPU Sew-On Button is the version buyers specify for caps when the base material is fixed by performance rather than by price. This entry sets out what the material actually changes, which specification to write into the tech pack, and where the cost sits — the three questions that decide whether the item passes bulk approval.
What it is
TPU gives sew-on button its drape and hand feel. In practice that means the trim behaves differently in cutting, in finishing and in wear: plating and coating adhesion must be tested on the actual base. Buyers who specify the material up front avoid the most common failure — an item that looks right on the sample card and behaves differently in bulk.
Typical specification
| Item | Sew-On Button |
|---|---|
| Base material | TPU |
| Standard size | 6 mm Width |
| Common finishes | Mercerised Finish, Rose Gold Plating, Pearlescent Coating |
| Processes | Yarn Dyeing, Calendering, UV Protection Finishing |
| Typical application | Caps |
| Related applications | Backpacks, Evening Wear, Coats, Luggage |
| Test standard | GB 18401 |
| Usual packing | 500 pieces per polybag, 10000 per carton |
Properties that matter in buying
- Dimensional stability — 3% allowance is built into the spec before cutting.
- Colour fastness — tested to GB 18401 on the actual base material, not on a substitute.
- Mechanical performance — elastic recovery after 10 cycles or washes.
- Compliance — GB 18401 documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Baby Clothing
- Backpacks
- Yoga Wear
- Sleepwear
- Blazers
- Kidswear
How to specify it
- Name the base material in the tech pack, not just the item.
- Fix the size and tolerance in writing before sampling starts.
- Approve a counter sample made from the actual bulk base material.
- Order the test report against the standard your market requires.
- Retain a golden sample at the factory and a second one with you.
Related reading
Related specifications on this site cover denim fabric, snap button, quilted fabric, zipper chain, and the processes most often paired with sew-on button include mercerising, enamel filling, brushing.
Send the reference sample or tech pack and we will come back with a costed specification, a sampling timetable and the compliance documents your market requires.
