| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluororesin fiber sheet, allowing easy manufacture of a printed board with a small difference between a thermal expansion coefficient in XY directions and a thermal expansion coefficient in a Z direction and entanglement of a printed board core material of low dielectric constant and low dielectric tangent or high dielectric constant and low dielectric tangent or particulates of an optical catalyzer directly therewith, or physical high-density deposition thereof with fusion, and being useable as a permeable filter for water or liquid treatment or air purification, and its production method. SOLUTION: The fluororesin fiber sheet containing a given number of inorganic particulates which is produced by coagulating inorganic particulates with a coagulant, dispersing the fluororesin fibers and the coagulant particulates together, and sheeting its raw dispersed material water solution in a wet sheeting method, and its production are provided.
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