| 摘要 |
PROBLEM TO BE SOLVED: To produce a clay porous body which is good in dispersibility of the clay, capable of preventing an incorporating of bubbles, is uniform and high in strength by heat-concentrating an aq. dispersing containing the clay, subjecting the concentrated dispersion to a rapid freezing, then subjecting the frozen matter to freeze-drying. SOLUTION: The aq. dispersion containing 0.5-50wt.% clay and a fiber, a colorant, and antimicrobial agent, a deodorizer and/or a perfume at need is heatconcentrated to obtain an aq. concentrated matter having <=60wt.% solid matter content. Then, this aq. concentrated matter is formed in a prescribed shape, and after subjecting the matter to the rapid freezing with >=1×10<-3> ml/sec freezing speed, she matter is subjected to the freeze-drying.
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