What is the difference between sewn coil and spiral zips?
Spiral zips are made from integrally weaving monofilament into the centre of the zip as one continuous process. Because this process only involves two materials this is a more quality efficient process. See the Product Information on our website.
Why are sewn coil zips sometimes called nylon zips?
Previously these zips may have been made from a range of manmade materials like nylon, polyester, polypropylene, poly butyl phthalate (PBT). Nylon was a common material used for zips due to its smoother feel and so this remained as a name for this category of zips.
What are sewn coil zips made from?
Sewn Coil Zips are made from sewing a coil of monofilament, normally polyester wrapped around a polyester cord , onto 2 tapes , normally also made of polyester. See the Product Information on our website.