US 12,290,076 B2
Baking tray or baking grid having a non-stick and/or non-wetting coating, cooking appliance comprising such a baking tray or baking grid and method for manufacturing a baking tray or baking grid
Tobias Schütz, Rothenburg ob der Tauber (DE); Filippo Tisselli, Forli (IT); and Klaus Wälzlein, Rothenburg ob der Tauber (DE)
Assigned to Electrolux Appliances Aktiebolag, Stockholm (SE)
Appl. No. 17/776,841
Filed by ELECTROLUX APPLIANCES AKTIEBOLAG, Stockholm (SE)
PCT Filed Sep. 29, 2020, PCT No. PCT/EP2020/077245
§ 371(c)(1), (2) Date May 13, 2022,
PCT Pub. No. WO2021/094032, PCT Pub. Date May 20, 2021.
Claims priority of application No. 19209417 (EP), filed on Nov. 15, 2019; and application No. PCT/CN2020/083446 (WO), filed on Apr. 7, 2020.
Prior Publication US 2022/0386627 A1, Dec. 8, 2022
Int. Cl. A21B 3/13 (2006.01); C23C 18/12 (2006.01); C23C 28/00 (2006.01); F24C 15/00 (2006.01); F24C 15/12 (2006.01); C23D 5/04 (2006.01)
CPC A21B 3/13 (2013.01) [C23C 18/122 (2013.01); C23C 18/1225 (2013.01); C23C 28/321 (2013.01); C23C 28/345 (2013.01); F24C 15/005 (2013.01); F24C 15/12 (2013.01); C23C 18/1254 (2013.01); C23D 5/04 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A coated baking tray or baking grid having a non-stick and/or non-wetting coating produced by a process comprising the following steps:
a) providing a baking tray or baking grid having an upper surface and a lower surface,
b) pretreating the surface upper surface and/or the lower surface of the baking tray or baking grid to yield a pretreated baking tray or baking grid having a surface with a surface roughness suitable for applying a non-stick and/or non-wetting coating, the baking tray or baking grid being pretreated by mechanical treatment, physical treatment, or chemical treatment,
c) applying the non-stick and/or non-wetting coating to the surface of the pretreated baking tray or baking grid, wherein the non-stick and/or non-wetting coating comprises at least one layer that is obtained by a sol-gel process from a first composition comprising a silica sol and a silane,
wherein the baking tray or baking grid is pretreated to form a ground layer, the ground layer being an enamel layer having a layer thickness between 10 and 80 μm.