Method for obtaining porcelain stoneware tiles with anti-slip surface
AssigneeGruppo Concorde S.P.A.
InventorsMaurizio Mazzotti, Yuri Beghi, Alan Bazzani
Life of this patent
Estimating the term…
Abstract
A method for obtaining a porcelain stoneware tile with anti-slip surface includes an enameling step, said step comprising the deposition—on the walkable surface of the tile—of a mixture of micro-grits added to a usual enamel, most of said micro-grits having dimensions smaller than 60 μm and being in a percentage smaller than 25% and preferably smaller than 20% by dry weight of the mixture, the remainder consisting of enamel. Furthermore, a tile with walkable surface layer may be obtained according to the aforementioned method.
Claims7
A method for obtaining a porcelain stoneware tile with anti-slip surface, said method comprising the steps of
- preparing the raw materials suitable to obtain the tile, and forming a mixture suitable to define the tile,
- pressing the mixture,
- drying the product obtained by pressing,
- enamelling the dried tile with an enamelling product,
- firing the enamelled tile,
- grinding the enamelled tile,
- wherein
- the enamelling step is carried out with an enamelling product comprising a mixture of micro-grits having dimensions smaller than 100 μm added to an enamel, the micro-grits being present in the mixture in a percentage smaller than or equal to 25% by dry weight, the remaining percentage mainly being defined by enamel, said mixture of micro-grits comprising two micro-grits, a first micro-grit having the following composition:
- Al2O3 between 10% and 20% by weight on the total;
- CaO between 10% and 20% by weight on the total;
- K2O between 1% and 5% by weight on the total;
- MgO between 1% and 5% by weight on the total;
- Na2O between 1% and 5% by weight on the total;
- SiO2 between 50% and 60% by weight on the total;
- SrO between 1% and 5% by weight on the total;
- ZnO between 1% and 5% by weight on the total,
- the second micro-grit having the following composition:
- Al2O3 between 20% and 30% by weight on the total;
- CaO between 5% and 10% by weight on the total;
- K2O between 1% and 5% by weight on the total;
- MgO between 1% and 5% by weight on the total;
- Na2O between 1% and 5% by weight on the total;
- SiO2 between 50% and 60% by weight on the total;
- ZnO between 1% and 5% by weight on the total.
Dependencies are inferred from the claim text.