Structure of Zippers
Zippers can be divided into three major parts: the tape, the teeth and the slider.
Slider: The slider joins or separates the teeth, also known as elements, when the zipper is opened or closed. Depending on their use, various types of sliders are available in the market.
Teeth: The teeth, also known as elements, are the parts on each side of a zipper that mesh, or engage, with each other when passed through the slider. When the left and the right side teeth are engaged, they are called chain.
Tape: The tape is manufactured exclusively for zippers. It is usually made of polyester, but synthetic fiber tape, vinyl tape and cotton tape are also available to be used for specific purpose zippers.
Types of Zippers
There are a variety of zippers available in the market. All the zippers, however, are chiefly manufactured from three types of materials- Metal Chain; Molded Plastic Chain; and Coil (Nylon) Chain. These chains can be used to make various kinds of zippers.
Bag Type Zipper:It has a single slider which moves in one way only, used mainly in pants, purses, tents, etc.
Closed End Zipper:The teeth, also known as elements, are the parts on each side of a zipper that mesh, or engage, with each other when passed through the slider. When the left and the right side teeth are engaged, they are called chain.
Open End Zipper: The two parts of the zipper fully separate from each other, mostly used in jackets.
Two-way Open End Zipper: It has two slides that can be opened from both the ends. It is used in items like heavy winter coats where more space is needed in particular conditions. It keeps the top slider zipped up while the zipper halves completely separate just like a standard jacket zipper.
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