How Are Zip Lock Bags Made?
Polyethylene plastic is melted down to a point in which it is pliable. It is then poured into a very thin mold that is in the shape and size of the bag being made. The closures on the bags are formed in separate molds out of stronger, thicker plastic. The closure tracks are then transfixed to the lips of the baggies. Ziploc brand bags are made a little differently. Ziploc brand bags offer a zipper closure bag as well; these zipper bags have a plastic slider zipper used to push the lips of the bag closed and to fasten them shut. How Does the Zipper Closure Work? The tracks on each lip of the bag, connect together like puzzle pieces. There is male and a female track. The male track locks into the female track fastening closed and requiring quite a tug to be opened again. The closure is durable enough that you can hold the bag upside down and the contents will not spill out onto the floor. The Uses of Zip Lock Bags Already zip lock bags are being used for everything. Bakery companies offe
