In 1966, Mr. Ishii, a Chemical Engineer employed in the researcher division of Kureha, Japan, and Mr. Yoshida, and avid angler working in the Patent Department of Kureha, Japan, noticed that the attributes of Fluorocarbon were ideally suited to fishing line. The men saw that Fluorocarbon is less absorbant than nylon monofilament, impervious to UV rays, high-density and nearly invisible underwater. They knew early on...Fluorocarbon would revolutionize fishing line! And so the two men applied for a patent, which was granted and registered in 1969.
Since then, Seaguar has advanced many steps to arrive at the product we're so proud to present today. The first puzzle provided by the 1970's version of Fluorocarbon fishing line was how to improve knot strength for Leader and Tippet applications. Seaguar engineers decided it would be quite difficult to improve on knot strength without changing the structure of the line and they did not want to compromise the benefits that had been achieved thus far.