Types of Zippers based on Functionality

Heavy duty zippers are always measured from "component to component" (end stops), regardless of  zipper style.

Close-end zippers are non-separating and are normally opened and closed with a slider.  The bottom stop is made up of a single part and doesn't allow complete separation of the  chain. These zippers are used on trousers, jeans, bags, boots, etc.

Open-end (separating) zippers have separated ends. The ending part is joined by a box  and pin mechanism provided on the lower end of the zipper. The zippers are closed using  sliders, and are normally used on jackets and other outerwear.

Two-way separating zippers have separated ends as well. The bottom slider allows  movement from the bottom of the zipper. These zippers are used in rainwear, sportswear and sleeping bag.

Two-Way head to head zippers have two sliders at the center of the chain when the  zippers are closed. Head to head zippers can be open-end by pulling the sliders towards the  stops, but cannot be separated because the ending parts have two stops that cannot be  divided. These zippers are mainly used for bags, backpacks and luggage.

Two-way tail to tail (back to back) zippers have sliders on opposite ends when the gold zipper  is closed. These zippers can be opened by pulling the sliders towards each other, but cannot  be separated. They are used for overalls and anything else.

Length Tolerance in Zippers : Generally zippers can vary when bulk is received due to various factors. Based on JIS-S3015 following tolerance is acceptable in zipper lengths.

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