A sheet shaped heat generating body 1, wherein said substrate is made of {HEAD ~ an organic fiber} or {TAIL ~ an inorganic fiber} 
A sheet shaped heat generating body 1 , wherein said substrate is made of { HEAD ~ an organic fiber } or { TAIL ~ an inorganic fiber }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL