Method for producing carbonized fabric

Abstract

There is provided a carbonized fabric production method for producing a carbonized fabric by heating a fabric containing cellulose in a furnace, the method comprising: a fabric arrangement step; a first temperature-increasing step; a second temperature-increasing step; a maintenance step; a temperature-decreasing step; and a furnace-opening step.

1 . A carbonized fabric production method for producing a carbonized fabric by heating a fabric containing cellulose in a furnace, the method comprising:
 a fabric arrangement step of arranging the fabric in the furnace;   a first temperature-increasing step of increasing a temperature of at least a fabric-arrangement region in the furnace to a temperature that is closely below a carbonizing temperature of the fabric, while at least the fabric-arrangement region in the furnace being adjusted to be in an inert atmosphere;   a second temperature-increasing step of, after the first temperature-increasing step, increasing the temperature of at least the fabric arrangement region in the furnace to a temperature in a range of from 1,200° C. to 1,400° C., while at least the fabric arrangement region in the furnace being adjusted to be in a reducing atmosphere relative to at least the inert atmosphere in the first temperature-increasing step;   a maintenance step of maintaining, for a predetermined period of time, the temperature in the furnace which has reached a temperature in a range of from 1,200° C. to 1,400° C. in the second-temperature increasing step;   a temperature-decreasing step of gradually decreasing the temperature in the furnace, after a lapse of the predetermined time; and   a furnace-opening step of opening the furnace after the temperature in the furnace has become about 100° C. or less in the temperature decreasing step.   
     
     
         2 . The carbonized fabric production method according to  claim 1 , wherein a raw material of the fabric is cotton. 
     
     
         3 . The carbonized fabric production method according to  claim 1 , wherein the predetermined period of time is about from 1 to 2 hours. 
     
     
         4 . The carbonized fabric production method according to  claim 1 , wherein a period of time to be spent for the temperature-decreasing step is 20 hours or more. 
     
     
         5 . The carbonized fabric production method according to  claim 1 , wherein, in the furnace-opening step, opening and shutting the furnace are performed intermittently so as to prevent a sudden decrease of the temperature in the furnace.