Definition of zipper:
1. Fastener consisting of two strips each with a row of metal teeth or plastic teeth, used to connect the edge of the opening (such as clothing or bag mouth), a sliding piece can pull the two rows of teeth into the interlocking position to make the opening closed;
2. A chain attached to something (as an object to be lifted or dropped) to tighten, stabilize, or guide it.
composition
Zippers are composed of chain teeth, pull-heads, upper and lower stoppers (front and back) or locking parts. The chain tooth is the key part, which directly determines the side tensile strength of the zipper. A general zipper has two chain straps, each with a chain tooth, two chain teeth interlaced with each other. Pull the head to hold both sides of the chain teeth, with the help of pull a loop slide, can make both sides of the chain teeth meshing or off.
Zippers are classified by materials as nylon zippers, resin zippers and metal zippers.
1. Nylon zipper: invisible zipper, heart zipper, glue waterproof zipper, no heart zipper, double bone zipper, woven zipper, etc.
2. Resin zipper: gold (silver) tooth zipper, transparent zipper, translucent zipper, animal light zipper, bud zipper, diamond zipper.
3. Metal zipper: aluminum zipper, copper zipper (brass, copper, copper, copper, etc.), black nickel zipper.
