Sheet manufacturing apparatus

Abstract

There is provided a sheet manufacturing apparatus including: an accumulation section that accumulates a material containing fibers by an air flow to form a web; a humidification section that applies moisture from one surface side of the web; and a pressurization section that pressurizes the humidified web to form a sheet, in which the pressurization section includes a first roller that comes into contact with one surface of the web and a second roller that comes into contact with the other surface of the web, and a surface of the first roller is harder than a surface of the second roller.

What is claimed is: 
     
         1 . A sheet manufacturing apparatus comprising:
 an accumulation section that accumulates a material containing fibers by an air flow to form a web;   a humidification section that applies moisture from one surface side of the web; and   a pressurization section that pressurizes the humidified web to form a sheet, wherein   the pressurization section includes a first roller that comes into contact with one surface of the web and a second roller that comes into contact with the other surface of the web, and   a surface of the first roller is harder than a surface of the second roller.   
     
     
         2 . The sheet manufacturing apparatus according to  claim 1 , wherein
 the first roller is made of metal and the second roller is made of metal and rubber covering the surface thereof.   
     
     
         3 . The sheet manufacturing apparatus according to  claim 2 , wherein
 the surface of the first roller has irregularities.   
     
     
         4 . The sheet manufacturing apparatus according to  claim 1 , wherein
 the first roller is a driving roller and the second roller is a driven roller.   
     
     
         5 . The sheet manufacturing apparatus according to  claim 1 , wherein
 each of the first roller and the second roller has a built-in heater for heating.   
     
     
         6 . The sheet manufacturing apparatus according to  claim 1 , further comprising:
 a starch supply section that supplies starch for bonding the fibers; and   a mixing section that mixes the starch and the fiber.