Title:
PRODUCTION OF LIGHTWEIGHT AIR-PERMEABLE BOARD
Document Type and Number:
Japanese Patent JP3785504
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a lightweight air-permeable board, having a strength and capillarylike flow holes for flowing air therethrough and excellent in water absorbing and heat insulating performances by press forming a composition comprising prescribed amounts of a specific ceramic fine hollow grains, specified rubble grains, a specific natural mineral and water and then baking the resultant formed compact.
SOLUTION: A composition comprising 100 pts.wt. ceramic fine hollow grains having ≥600kgf/cm2 compressive strength, 0.3-0.5g/cm3 bulk specific gravity and ≥1,500°C melting point (e.g. an expanded and produced composition comprising silica, alumina, etc.), 50-200 pts.wt natural rubble grains (pulverized granite and andesite), 50-200 pts.wt. natural mineral containing a flux (e.g. a mixture containing a feldspar and borax added to a ball clay) and 20-150 pts.wt. water is press formed and the formed compact is then baked at 700-1,300°C.
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Inventors:
Mitsuo Minagawa
Osamu Minagawa
Osamu Minagawa
Application Number:
JP35169995A
Publication Date:
June 14, 2006
Filing Date:
December 18, 1995
Export Citation:
Assignee:
Riball Co., Ltd.
International Classes:
B01D39/20; C04B38/08; (IPC1-7): C04B38/08; B01D39/20
Domestic Patent References:
| JP3020992U | ||||
| JP3018613U | ||||
| JP62096375A | ||||
| JP7187740A |
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