TPU Invisible Zipper for Caps — Specification, Uses and Sourcing Notes
TPU Invisible Zipper for Caps: Specification, Uses and Sourcing Notes
TPU Invisible Zipper 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 invisible zipper its strength and surface character. In practice that means the trim behaves differently in cutting, in finishing and in wear: the finish has to be applied before assembly. 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 | Invisible Zipper |
|---|---|
| Base material | TPU |
| Standard size | 6 mm Width |
| Common finishes | Antique Brass Plating, Nickel-Free Electroplating, Anodised Finish |
| Processes | Laminating, Yarn Dyeing, Digital Printing |
| Typical application | Caps |
| Related applications | Suits, Activewear, Yoga Wear, Dresses |
| Test standard | RoHS |
| Usual packing | 200 pieces per polybag, 10000 per carton |
Properties that matter in buying
- Dimensional stability — 2% allowance is built into the spec before cutting.
- Colour fastness — tested to RoHS on the actual base material, not on a substitute.
- Mechanical performance — cycle life after 20 cycles or washes.
- Compliance — RoHS documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Skirts
- Sleepwear
- Lingerie
- Yoga Wear
- Gloves
- Bridal Gowns
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 zipper guard, crochet lace, uv protection fabric, brocade fabric, and the processes most often paired with invisible zipper include enamel filling, laser cutting, digital printing.
If you are comparing suppliers, send us the spec they quoted against. We will quote the same spec and show you where the difference sits.
