MANUFACTURING METHOD OF INORGANIC PAPER-MAKING PLATE

PROBLEM TO BE SOLVED: To provide a manufacturing method of an inorganic paper-making plate wherein bending caused by weight is not large even in a thick product, handling is excellent at transportation and processing, processability is favorable, and a fire-proofing property is excellent, namely total heat generation in a heat generation test for 20-minute heating by the use of a test machine regulated in a JIS A 5430 appendix is low. SOLUTION: The manufacturing method of an inorganic paper-making plate comprises steps for: wet-blending a composition comprising 30 to 70 mass% of a hydrate material for forming a matrix, 3 to 9 mass% of natural fiber and a fiber length of 6.0 to 0.2 mm having a water-filtration degree of 150 to 450 ml under Canadian standard freeness and 0.5 to 5 mass% of inorganic and/or synthetic fiber (excepting asbestos) having a fiber diameter of 10 to 50 μm provided that a total mass% of the natural fiber and the inorganic and/or synthetic fiber is 3.5 to 12 mass%, 5 to 30 mass% of a calcium silicate hydrate having an average particle size of 30 to 100 μm obtained previously by synthesis by water-vapor heating, 5 to 20 mass% of Wollastonite and 1 to 15 mass% of an inorganic filler, whereby slurry is obtained, then paper-making the obtained slurry to give a raw plate, and then dehydrating the raw plate at the holding pressure of 16 to 40 N/mm2, and aging and curing it, whereby a cured material having a thickness of 2 to 5 mm and the apparent density of 1.2 to 1.5 g/cm3is obtained. COPYRIGHT: (C)2010,JPO&INPIT