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Zipper
Introduction
A: Commonly-used Method for Discerning the quality of Zipper
- Tabs:
The day for the tabe should be even without stain and
scar,touched by hand , it feels soft. The tape lookslike wave
in the direction vertically and horizontaly.
- Teeth:
The surface of the teeth should be smooth,when used,if feels
soft without noise.
- Slider:
The brace should go smoothly and freely,fastened but will not
come off.
- Reinforce Tabpe:
The reinforce tape fits the tape well without breaking and
coming off.
- Box and Pin:
Square Bolt can be adopted freely fastening with the band.
- Top Stop and End Stop:
1.The top-stop must come together with first tooth on metal
and nylon zippers.But the distance can not be over 1 mm and
should be firm and looks fine.
2. The bottom stop must come together with the teeth or be
fastened on surface and should be firm and look fine.
B: Tips for selecting the Zipper
Different zipper suits dirrerent conditions, hence when buying
zippers the following matters should be pointed out to the
manufacture:
- where will the zipper be used (such as leather
trunk,footwear,jacket,raincoat,tent,jeans needing hard washing
and leather products with high acidity) or other special
requirements.
- Requirements for the content of zipper:does not need
containing AZO or nickel or pass needle detector.
C: Allowable tolerance of zipper length
Due to the inertie caused by the speed of machine operation
during the manufacturing of zipper as well as the completeness of
the teeth, there will appear allowable tolerance.The longer the
zipper is the bigger the allowable tolerance will be.
Attached as follows is the table of errors for Germany and
Japanese YKK
Table of errors for Germany and Japanese YKK
| Errors provided by
Japanese YKK in the New Century Fair |
| Zipper length (MM)
Allowable tolerance |
| bellow 30 |
± 5 MM |
| 30-below 60 |
± 10 MM |
| 60-bellow 100 |
± 1.5% |
| above 100 |
± 3% |
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