Patent ID: 7204015

Claim:
A method for producing an electric heating cloth which is heated uniformly and is characterized by high reliability and high flexibility comprising the steps of: interweaving a first group of flexible non-conducting threads arranged in a first direction with a single second group of flexible heating resistive threads arranged in a second direction which is perpendiculay to said first direction, each of said single second group of heating resistive threads characterized by a shell-nucleus structure wherein said nucleus is made of twisted flexible synthetic or glass fiber or fibers, said shell formed by dissolving a thermoplastic polymer in an organic solvent; adding an industrial carbon which is produced from acetylene to form a first mixture; grinding said first mixture; adding a colloidal graphite to said first mixture of thermoplastic polymer and organic solvent to form a second mixture; grinding said second mixture; coating a thread with said second mixture in a spinneret; and heating said coated heating resistive thread to remove said organic solvent.