This video shows how the zippers are made. They are not put into clothing until the 1930s. Zip is made metal, plastic on the nylon. Fabric type of it is called tape. It is generally polyster or cotton. To make metal zip machine rolls tape into the teeth machine. Zips can be between 3-10mm. Workers feed machine tape and teeth in joining machine. They are locked and continues as a zip. Then it goes to the cleaning machine it washes and cleans the metal pieces. After drying the machine applies hot wax. This lubricates the teeth. Next it goes to the gapping machine which leaves 4mm holes between the zips. There are 2 types of zippers. One of them doesnt open from the bottom and they need bottom stop. The other one is open end zip which goes on jackets for ex. They attach a pin at the end of the zipper. A pin is a little vertical metal piece. Next machine installs the slider. The other machine attaches the top stop. Each zipper is cut from the holes. Plastic zippers are a little bit different. Tape is same but the zip is different. They inject a liquid plastic into hole and it is cut as a teeth. The most ineteresting thing about this video was when making plastic zips they pour the liquid plastic and later they cut it as in teeth shape.
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