Inorganic fibrous regularly shaped article and method for adjusting hardness thereof

Abstract

An inorganic fibrous shaped product including organic fiber that includes at least biosoluble inorganic fiber having the following composition and an organic thickener, and including no colloidal silica: [Composition] SiO 2 : 70 to 82 wt %; CaO: 10 to 29 wt %; MgO: 1 wt % or less; Al 2 O 3 : less than 5 wt %; and the total of SiO 2 , CaO, MgO and Al 2 O 3 exceeds 98 wt %.

1 . An inorganic fibrous shaped product comprising organic fiber that comprises at least biosoluble inorganic fiber having the following composition and an organic thickener, comprising no colloidal silica:
 [Composition]   SiO 2 : 70 to 82 wt %;   CaO: 10 to 29 wt %;   MgO: 1 wt % or less;   Al 2 O 3 : less than 5 wt %; and   the total SiO 2 , CaO, MgO and Al 2 O 3  exceeds 98 wt %.   
     
     
         2 . The inorganic fibrous shaped product according to  claim 1 , further comprising a fixing agent. 
     
     
         3 . The inorganic fibrous shaped product according to  claim 2 , wherein the fixing agent is one or more selected from sulfates, nitrates, acetates and hydrochlorides of each of aluminum, magnesium, calcium, sodium and potassium. 
     
     
         4 . A method for adjusting the hardness of the surface of the inorganic fibrous shaped product according to  claim 1  wherein the amount of at least one of an organic thickener and a fixing agent is changed.