1. Explanation of terms
1) Zipper
The zipper is a connector which can be repeatedly closed and opened, and is composed of two flexible and mutually meshing single teeth chains.
2) Zipper teeth
The teeth fixed on the edge of the zipper belt by metal and non-metal materials according to laws.
3) Dentin chain
If two matching unilateral teeth are continuously meshed with each other, the two teeth will form a tooth chain.
4) Width of microphone teeth
Across the width between the two engaged teeth, or the width of the foot on which the puller pulls.
5) Pull head
It is a metal or plastic assembly used to pull and open the microphone teeth.
6) Top stop (front code)
The component that prevents the pull head from detaching from the microphone teeth when the zipper is closed.
7) bottom stop (back)
The component installed at one end of the zipper, which prevents the pulling head from sliding towards the pulling direction when the zipper is opened, and prevents the two parts of the microphone teeth from completely separating.
8) Zipper tape
The braid on which the teeth are fixed.
9) Self locking device
A device on the pull head to prevent the pull head from moving along the pull direction of the zipper.
10) Closed zipper
In the fully opened state, the zipper can not be separated from each other by two unilateral teeth.
11) Open zipper
Through the special structure (socket) at the bottom of the zipper, the zipper can be pulled in and out completely.
12) Double zipper
A zipper with two sliders and two opposite directions for the same flexible operation.
13) Chain zipper
Long zipper without other components
2. Common identification methods of zipper quality
1) Tape
The cloth belt shall be dyed evenly, without stain or scar, and soft in hand. In the vertical or horizontal direction, the cloth belt shall be wavy.
2) Teeth
The teeth surface shall be smooth, and the hand feel shall be smooth when pulling, and the noise shall be small.
3) Slider
The self-locking pulling head can be easily opened and locked without sliding.
4) Cloth glue
It is not easy to break or fall off.
5) Pin and box
Insert freely and fasten the cloth belt
6) top stop & bottom stop
The first teeth (metal, nylon) shall be tightly fastened at the top, and the distance shall not exceed 1mm, which shall be firm and perfect.
The lower teeth are fastened to the upper teeth or forceps and are firm and perfect.
3. Necessary instructions for manufacturers when purchasing zippers
What kind of products should zipper be applied to (such as leather case, shoes and boots, ski suit, raincoat, tent, jeans to be washed or leather products with high acidity) or other special requirements;
For the requirements of zipper composition, whether it needs azo free nickel free or needle detector.