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1. (WO2017056845) METHOD FOR MANUFACTURING DISHWASHER/DRYER

Pub. No.:    WO/2017/056845    International Application No.:    PCT/JP2016/075780
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: A47L 15/42
C23C 24/08
C23C 26/00
Applicants: SUMITOMO OSAKA CEMENT CO., LTD.
住友大阪セメント株式会社
Inventors: SHIGERU Keijiro
茂 啓二郎
Title: METHOD FOR MANUFACTURING DISHWASHER/DRYER
Abstract:
Provided is a method for manufacturing a dishwasher/dryer provided with an inner wall comprising a stainless-steel plate that has on the surface thereof a hydrophilic coating that is durable with respect to alkaline detergents and also sufficiently durable with respect to acidic detergents. This method for manufacturing a dishwasher/dryer includes: a step for forming a first layer that contains zirconium oxide and silicon oxide on the surface of the inner wall, at a heat-treatment temperature of 200°C or higher; a step for forming a second layer that contains an oxoacid on the surface of the first layer, at a heat-treatment temperature lower than the heat-treatment temperature used for the first layer; and a step for washing off the second layer to obtain a thin-film layer that contains zirconium oxide and silicon oxide on the surface of the inner wall, the water contact angle of the surface of the thin-film layer being 20° or less. The first layer contains 80% by mass or more of zirconium oxide in terms of oxides, and 1-20% by mass of silicon oxide in terms of oxides.