PORCELAIN ENAMELED STAINLESS STEEL SHEET EXCELLENT IN RAIN STRIPE STAIN STICKING RESISTANCE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce a porcelain enameled stainless steel sheet on which rain stripe stains are suppressed and suitable as exterior building materials maintaining a beautiful surface over a long period. ;SOLUTION: This porcelain enameled stainless steel sheet is the one using an austenitic stainless steel sheet having 0.5 to 3 μm surface roughness as center line average roughness R_a as a base material, and on which surface a porcelain- enameled layer contg. 2 to 20 pts.wt. anatase type TiO₂ is formed. It is produced by applying a porcelain enameling glaze obtd. by adding 2 to 20 pts.wt. anatase type TiO₂ to 100 pts.wt. SiO-Na₂O series frit or P₂O₅-Al₂O₃ series frit to a stainless steel sheet, executing heating at 550 to 600°C and firing it to form the polcelain enameled layer. By the photocatalytic function of the anatase type TiO₂, the organic components in stains are decomposed, and the stains are easily washed away by rain and water sprinkling.;COPYRIGHT: (C)1999,JPO