PRECOATED STEEL PLATE OF SUPERIOR WATER-REPELLENT, NON-ADHESIVE, ANTIFUNGUS AND FUNGUS-RESISTANT PROPERTIES

摘要

PROBLEM TO BE SOLVED: To obtain a precoated steel plate of superior water-repellent, inadhesive, antifungus and fungus-resistant properties. SOLUTION: A precoated steel plate is provided with a film having a composition of tetrafluoroethylene resin of 3-5 pts.wt. with a mixture at 0.1-5wt.% of ceramic particles coated with silver alloy or nickel alloy at the ratio of 1-30wt.% by the sputtering method and having the particle diameter of 1μm or less and the value of 3.5m<2> /g or more obtained by dividing the specific surface area (m<2> /g) by the specific gravity and thermoplastic polyether sulfone resin of 7-5 pts.wt. having aromatic hydroxyl group. As for the silver alloy or nickel alloy coating the ceramic particles, the alloy containing Cu and/or Zn of 10-50wt.% is contained. Particularly, the silver alloy or the nickel alloy having the amorphous phase is preferred from the viewpoint of keeping high activity for a long period of time.