JPS5848499B2 - Amiiri Taino Seizouhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing large and thin tiles, and more particularly to a method for manufacturing mesh tiles for the purpose of reinforcing the tiles and preventing fragments from falling off and peeling off during breakage.

Traditionally, tiles are made by molding tile base clay such as feldspar, quartzite, and pottery stone and then sintering it, but usually the thickness is increased or the area is decreased to provide impact resistance. are doing.

As a result, the weight per unit area becomes large, and for example, when adhering to a wall surface (in this case, the adhesion strength is increased and peeling is performed).
Must be prevented from falling off.

Furthermore, since the area per piece is small, there are drawbacks such as a large number of pieces to be pasted per area to be pasted, resulting in reduced workability.

It is also possible to increase the area per tile and reduce the thickness as much as possible in order to reduce the weight per unit area or the number of pieces to be pasted. Since the material is molded into a predetermined shape, dried, and then fired, if the drying is insufficient at this time, the moisture contained in the material will rapidly expand in the firing furnace, causing a so-called swelling phenomenon. If drying is carried out sufficiently, there is a drawback that the molded base material may crack or become distorted during drying.

Furthermore, even if such dog-shaped, thin tiles are made, there is a risk that the tiles will be damaged by external impact and fragments will fly off.

In other words, with conventional technology, it is extremely difficult to manufacture large, thin, and lightweight tiles, and even if they could be manufactured, the tiles obtained would have insufficient strength such as impact resistance. Because of this, they were easily damaged during transportation, carrying, and use, making them extremely inconvenient to handle.

The present invention is a method for manufacturing large tiles that improves the above-mentioned drawbacks, and provides tiles that are large and have excellent strength and durability.

Specifically {this is when a fibrous substance is mixed into the tile base clay, and the paper is made and shaped using the normal papermaking method {this is when a metal wire is placed in the middle of the paper-formed product, and then it is fired. This is a method of manufacturing wired tiles.

In other words, if a fibrous substance is mixed into an aqueous suspension of tile base clay, a coagulant is added, and the clay is adsorbed onto the fiber surface, papermaking is carried out using the normal papermaking method, then a large amount of tile base clay can be produced. The present invention uses such a sheet.

However, in the present invention, a plurality of sheets are laminated in order to obtain a molded product of the required thickness in the molding stage, or the paper is made several times in order to obtain the desired thickness in the papermaking stage. This method is used to make a sheet shaped product with a desired thickness, and at that time, the metal wire is placed in the molded product by sandwiching the metal wire.

In other words, one way to place the metal wire at the precept stage is to sandwich the metal wire between a plurality of sheets obtained by papermaking, and heat-dry and stack them using a hot press, for example. By doing this, a molded product having an intermediate portion (metal wire) can be obtained.

In addition, in the paper making stage, one method for placing metal wires is to place about half the solid content (tile base clay and fibrous A metal wire is then placed on the solid material on a paper-making screen, and then, in the second stage of paper-making, the solid content is further passed through the paper-making screen so that it becomes a shaped article with the desired thickness. There is a way to supply it.

By doing this, the metal wire will be present in the middle of the precept.

After drying, the pre-shaped articles obtained through the above-mentioned process are burnt to become wired tiles.

In the following, each matter of the present invention will be explained in more detail.The tile base clay used in the present invention may be tile base clay such as feldspar, silica, pottery stone, etc. For this purpose, it is preferable to use clay or a mixture thereof that has a so-called porcelain quality.

As the fibrous material, in addition to pulps such as kraft pulp, semi-chemical pulp, ground pulp, and waste paper pulp, inorganic fibers such as asbestos fibers, ceramic fibers, and glass fibers can be used.

Depending on the material, inorganic fibers may remain in the tile base even after firing, contributing to improving the strength of the tile.

When pulp is used as the fibrous material, the pulp is burned away during the firing of the tile base.

The sheet obtained by papermaking contains a large amount of tile base clay, and the amount of fibrous material mixed into the tile base clay is less than 10 weight φ, and if it is more than 10 weight φ, the tile after burning will be porous. This results in a decrease in quality and strength.

A common flocculant may be used, and it is preferable to use a combination of an inorganic flocculant such as alba sulfate and a polymer flocculant such as polyacrylamide.

The metal wire used is one with a high melting point, such as iron or nickel, and it is of course preferable to use a metal wire that can withstand high temperatures and is oxidizable.

Examples of these include stainless steel wire, iron chrome wire, nichrome wire, and the like.

From an economic point of view, iron is preferable, and in particular, a so-called low carbon steel wire with a low carbon content is used to prevent foaming during firing.

The metal wires may be hexagonal, square, or diamond-shaped, and by welding their intersecting points, the object of the present invention can be effectively achieved.

Moreover, even if the metal wires are not crossed in this way, the purpose can be sufficiently achieved by simply placing 1,000 G lines.

The wire diameter is not particularly limited as long as it is equal to or less than the thickness of the tile base, but from the viewpoint of strength, aesthetics, etc., it is preferably less than half the thickness of the tile base.

Furthermore, before placing the metal wire in the tile base, it is heat treated, pickled, and washed with alkali to remove rust and degrease before use.

Furthermore, in order to further improve the fusion and adhesion between the metal wire and the tile base clay or the tile base clay, the surface of the metal wire may be treated with an inorganic acid salt such as nickel sulfate or cobalt sulfate, or the surface of the metal wire may be It is also possible to use it by applying a high melting point glaze.

According to the manufacturing method of the present invention, since a molded product is obtained using a papermaking method, fibrous substances are evenly and irregularly scattered in the molded product and serve as a carrier for the tile base clay. Therefore, even if a precept is formed into a thin precept over a large area, it will not crack during drying and will not bulge during burning.

Moreover, since the molded product can have a metal wire in its middle part, the tile obtained by burning has a large area and a thin shape, but has low bending strength etc. This has significantly improved safety during transportation and use, with no fragments scattering or falling off even in the event of damage during handling.

In addition, in the papermaking method, in order to shape the tile base, it is possible to form it into any shape by selecting a hot press (by selecting a kettle type).

Aspects of the invention are now illustrated by examples.

Example 1 A fibrous substance was added to 90 parts by weight of tile base clay powder, which was sufficiently ground and mixed in a ball mill until it became a powder with a particle size of 0.5 to 1.0 μm, and suspended in a large amount of water with stirring. Canadian Standard Mouth Water Level (Freeness) 120Irtl
Add 5 parts by weight of NBKP (softwood bleached kraft pulp).

Next, 10 ppIn of an inorganic flocculant (banium sulfate) and 10 ppIn of a polymer flocculant (Sanpo IJ-N-500 manufactured by Sankyo Kasei ■) were added to the solid content in the above aqueous suspension.
ppm to adsorb clay powder on the surface of the fibrous material,
A paper sheet having a thickness of 2 mm was obtained by paper making using a square sheet machine (50 CIrL x 50 crIL wire mesh 180 mesh).

A diameter of Q. 3 turns of low carbon steel wire (
After placing a 15 mm square wire mesh made of 0.8% carbon content and superimposing a separately made 2 mm thick paper sheet,
It was dried under heat and pressure using a hot press at 200'C and 150kg/i, and fired at 1250°C for 10 hours.

The thickness of the obtained tile was 3rnrrL, and the thickness was JISA
-5209 bending failure load is 3. 5 k9/c1
rL was 0. Example 2 A wire mesh with a coating of high melting point glaze for tiles was used on the surface of the low carbon steel wire, but otherwise the same procedure as in Example 1 was carried out.
The bending failure load of the resulting tile is 4. It was 0 kg/CrrL.

Example 3 Tile base clay 9 made into fine powder with a particle size of 0.5 to 1.0μ
3 parts by weight and Canadian standard freeness 130cc
An aqueous suspension consisting of 7 parts by weight of waste newspaper pulp was mixed with the solid content of the aqueous suspension (with respect to the solid content of the aqueous suspension, ±1 Qppm of ban sulfate and a polymer flocculant (Sanbory-N-500 manufactured by Sankyo Kagaku Co., Ltd.) were added.
) 1 ppm was added, and approximately half of the solid content was extracted using a square sheet machine (wire area 25 x 25 C: rrL), and then a sheet made of a metal wire with a low carbon content of 0.3 mm in diameter was used. A wire mesh measuring 15 mm square is placed on top of the solids that have been made into a paper-making mesh.

Subsequently, the remaining fixed portion in the aqueous suspension is further scooped out to obtain a sheet or shaped product with a thickness of about 4 mm and having a wire mesh in the middle.

After drying the sheet or shape under heat and pressure, it is fired to obtain a mesh tile with a thickness of 3 mm.

The bending fracture strength of the obtained tile was 3.8 kg/C1rL
Comparative Example 1 Exactly the same as Example 1 (the bending failure load of a 3 mm thick tile obtained by straining but without placing a metal wire was 2.3 k)
g/C: rrL.

Claims (1)

[Claims] 1. When a fibrous substance is mixed into the tile base clay and the paper is made and shaped using the normal papermaking method, a metal wire is placed in the middle of the paper-formed product, and then it is fired. A method for producing mesh tiles.