Monofilament fishing lines start as small pellets. Manufacturing engineers mix various types of nylon polymer pellets to achieve the performance characteristics required by anglers. Once the correct amount of pellets are mixed, they are ready to be heated.
Melting the Pellets
The nylon polymer pellets are heated in a holding bin until they are melted together; at this point, the mixture is ready to be extruded into its next form.
The melted polymer mixture is extruded through a die that forms the shape and size of the line. Different-size dies produce different line diameters.
Spooling the Line
As the line comes off the extrusion machine, it is spun onto a waiting spool, where a machine counts the exact number of yards in order to fill the spool properly.
As with all manufacturing processes, the line is checked periodically during the process to ensure the end product meets the requirements of the finished product. Once approved, the spools of line are packaged and shipped to a retailer for sale.