Rubber Closed-End Zipper for Backpacks — Specification, Uses and Sourcing Notes
Rubber Closed-End Zipper for Backpacks: Specification, Uses and Sourcing Notes
Rubber Closed-End Zipper is the version buyers specify for backpacks 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
Rubber gives closed-end zipper its durability under wash and abrasion. 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 | Closed-End Zipper |
|---|---|
| Base material | Rubber |
| Standard size | 38 mm Width |
| Common finishes | Black Nickel Finish, Glossy Enamel Coating, Rainbow Iridescent Finish |
| Processes | Electroplating, Garment Washing, UV Protection Finishing |
| Typical application | Backpacks |
| Related applications | Blouses, Shirts, Blazers, Bridal Gowns |
| Test standard | EN 71-3 |
| Usual packing | 200 pieces per polybag, 5000 per carton |
Properties that matter in buying
- Dimensional stability — 3% allowance is built into the spec before cutting.
- Colour fastness — tested to EN 71-3 on the actual base material, not on a substitute.
- Mechanical performance — pull strength after 50 cycles or washes.
- Compliance — EN 71-3 documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Bags
- Activewear
- Swimwear
- Jeans
- Baby Clothing
- Yoga Wear
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 leather patch, reflective tape, guipure lace fabric, ramie fabric, and the processes most often paired with closed-end zipper include embroidery, garment washing, metal stamping.
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