DESCRIZIONE
A fine heating wire having a small diameter and applicable to various products. The fine heating wire is bendable, densely installed, and has high thermal efficiency. It includes a core formed with synthetic fiber material and a coil spirally wound around the outer portion of the core. The core connects one or more pairs of polyaramid fiber units. Each unit is formed by braiding dozens to hundreds of fine polyaramid fiber strands to maintain the diameter within 200-600 denier. The coil is formed of copper or copper alloy to withstand temperature rising up to 60° within five minutes when 3.7-12V power is supplied to maintain a resistance per unit length value equal to or greater than 0.5 Ω/m. The diameter of the fine heating wire is minimized to be installed inside a slim fiber, and is bendable and densely installed to be applied to products, such as gloves and socks.