Custom Zipper — Polycarbonate with Ultrasonic Welding
We supply zipper to garment factories and brands, built in Polycarbonate with ultrasonic welding for bridal and eveningwear studios. On a trim like this the specification that decides the outcome is slider smoothness across the full length, tested by hand on bulk, so that is agreed in writing before bulk — not discovered when the first carton is opened on the line. Programmes start at 3000 pieces per style per finish.
The failures here are predictable: minimum order quantities far above what a growing brand can absorb, or colour drift between the approved sample and the bulk trim. We lock material, finish, dimension and tolerance before bulk, and prepare CPSIA and California Prop 65 compliance so the shipment clears instead of sitting at port while your selling season passes.

Specification
| Product | Zipper |
|---|---|
| Gauge | #3 |
| Type | reverse coil zipper |
| Base material | Polycarbonate |
| Finish / process | Ultrasonic Welding |
| Colour options | 6 Pantone-matched shades |
| Packing | reel packed |
| MOQ | 3000 pieces per style per finish |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 20-30 days after approval |
| Compliance | CPSIA and California Prop 65 compliance; salt spray test for metal finishes |
| Ship to | Los Angeles or New York (North America) |
What buyers can customise
- Hard Enamel Fill — available on Polycarbonate, quoted per position and per colour.
- Overlocked Edge — available on Polycarbonate, quoted per position and per colour.
- Paint Spray — available on Polycarbonate, quoted per position and per colour.
- Chrome Plating — available on Polycarbonate, quoted per position and per colour.
- Epoxy Dome — available on Polycarbonate, quoted per position and per colour.
- Die-Casting — available on Polycarbonate, quoted per position and per colour.
- Antique Silver — available on Polycarbonate, quoted per position and per colour.

How we produce it
- Drawing or reference sample review, with size and finish confirmed
- Material selection and a finish sample or strike-off
- Prototype made to the agreed gauge
- Fit and wash test on the actual garment fabric, then a pre-production sample
- Bulk run with ultrasonic welding applied under controlled settings
- In-line inspection, final AQL 2.5 inspection and packing to your ratio
Where it is used
- Denim and workwear — hard-wearing finishes that survive industrial washing
- Outerwear and tailoring — matched to the shell fabric so it drapes with the garment
- Childrenswear and schoolwear — tested to the destination's safety standard
- Bridal and eveningwear — small runs with hand-finished detail
- Uniform and corporate programmes — repeatable spec held on file for reorders

Packing, testing and delivery
Trims are packed to the ratio you specify — by size, by colour or by garment set — with barcodes applied where the line needs them. Test reports for salt spray test for metal finishes are prepared for the destination market. We ship to Los Angeles or New York with the commercial invoice, packing list and certificate of origin, and hold the approved reference so reorders reproduce the same material, the same finish and the same slider smoothness across the full length.
FAQ
What packing options are available?
Bulk packed, carded, or packed to your own size and design ratio with barcodes applied.
Can you do small runs across many designs?
Yes — many studio and boutique programmes run small quantities across a wide design set.
Do you ship to our forwarder?
Yes. We deliver to your nominated forwarder or quote landed cost under the agreed Incoterm.
How long does sampling take?
A first sample takes 7 working days, and each revision about 5 days.
Start your zipper programme
Tell us the quantity, the target price and the delivery window — we will tell you what is realistic before you commit.