TPU Bra Underwire for Upholstery — Specification, Uses and Sourcing Notes
TPU Bra Underwire for Upholstery: Specification, Uses and Sourcing Notes
TPU Bra Underwire is the version buyers specify for upholstery 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 bra underwire its strength and surface character. In practice that means the trim behaves differently in cutting, in finishing and in wear: shrinkage allowance has to be built into the spec. 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 | Bra Underwire |
|---|---|
| Base material | TPU |
| Standard size | 9 mm Width |
| Common finishes | Antique Copper Finish, Rainbow Iridescent Finish, Glossy Enamel Coating |
| Processes | Warp Knitting, Water Repellent Finishing, Enzyme Washing |
| Typical application | Upholstery |
| Related applications | Gloves, Swimwear, Baby Clothing, Underwear |
| Test standard | Bluesign |
| Usual packing | 500 pieces per polybag, 5000 per carton |
Properties that matter in buying
- Dimensional stability — 2% allowance is built into the spec before cutting.
- Colour fastness — tested to Bluesign on the actual base material, not on a substitute.
- Mechanical performance — cycle life after 20 cycles or washes.
- Compliance — Bluesign documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Socks
- Kidswear
- Dresses
- Coats
- Outdoor Tents
- Swimwear
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 metallic thread, coated fabric, polyester fabric, shank button, and the processes most often paired with bra underwire include anti-pilling finish, mercerising, enamel filling.
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.
