Freeze-thaw stable stoneware tile and process for production thereof
OwnerShigetaka Fukuokainventor
Life of this patent
Estimating the term…
Abstract
Freeze-thaw stable stoneware tile is provided, which possesses in its tile body a multiplicity of pores having a pore diameter of 0.6 micron or more and exhibiting no substantial capillary action and a multiplicity of continuous micropores having a pore diameter of 0.3 micron or less and exhibiting substantial capillary action. The relatively coarse pores are communicated with the micropores, and the micropores are communicated with the outside of the tile body. The tile is produced by compressing a mixture of a mineral flux material having a specific particle range and a plastic mineral material into a molded article having a packing rate of 0.68 or more, and then baking the molded article to a temperature at which the mineral flux material fuses.
Claims19
Freeze-thaw stable fired stoneware tile which includes, in its tile body having water absorption of about 0.5 to about 10%, a multiplicity of relatively coarse discontinuous pores having a pore diameter substantially in the range of about 0.6 to about 100 microns and exhibiting no substantial capillary action, and a multiplicity of continuous micropores having a pore diameter of not more than about 0.3 micron and exhibiting substantial capillary action, said relatively coarse pores being communicated with the continuous micropores, and said continuous micropores being communicated with the outside of the tile body.
Freeze-thaw stable fired stoneware tile which includes, in its tile body having water absorption of about 0.5 to about 10%, a multiplicity of relatively coarse pores having no substantial capillary action and a multiplicity of continuous micropores having substantial capillary action, said relatively coarse pores being communicated with the outside of the tile body, which was produced by compressing a raw stoneware material consisting essentially of a plastic mineral material and a mineral flux material having a mean particle size of not less than about 1 micron into a molded article having a mean packing rate of not less than 0.68, and then baking the molded article to a temperature at which the flux material included in the molded article fuses.
A process for production of freeze-thaw stable stoneware tile including, in its tile body having water absorption of about 0.5 to about 10%, a multiplicity of relatively coarse pores having no substantial capillary action and a multiplicity of continuous micropores having substantial capillary action, said relatively coarse pores being communicated with the continuous micropores, and said continuous micropores being communicated with the outside of the tile body, which process comprises the step of compressing a raw stoneware material consisting essentially of a plastic mineral material and a mineral flux material having a mean particle size of not less than about 1 micron into a molded article having a mean packing rate of not less than 0.68, and then baking the molded article to a temperature at which the flux material included in the molded article fuses;
- whereby the continuous micropores are formed and the raw stoneware material is bonded together, and then the flux material is fused to form the relatively coarse pores communicated with the micropores.
Dependencies are inferred from the claim text.