JPS58149159A - Surface finishing method of hydraulicity molded material - Google Patents

Abstract

PURPOSE:To obtain a molded material with an excellent fine appearance at low cost, by impregnating synthetic resin to a surface of the hydraulicity molded material of shirasu - cement system and grinding the surface. CONSTITUTION:400cc of, for instance, 98% sulfuric acid and 8 litres of water are added to stir 15kg of shirasu powder in grain size about less than 2-5mm. screened after solar drying, and then 12kg of calcium hydroxide is added to stir the powder. Then, for instance, 8.5kg of blast furnace cement class B and 1.5kg of calcium sulfate are added to stir the above and obtain pH about 12. Here dewatering is performed to obtain about 17wt% water, and a little amount of plasticizer is added to extrude the material to a plate shape by an extruding machine and cut the material into a tile shape. Then the material is dried after curing at normal temperature for about a week and impregnated with acrylate resin melamine resin system paint to a depth about at least 3mm. under the surface then heated to about 120 deg.C, after completion of solvent volatilization and resin hardening, three-stage surface grinding is performed by sand paper.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for finishing the surface of a molded article, particularly a method for finishing the surface of a hydraulic molded article whose main components are whitebait powder and cement.

It is no exaggeration to say that it is difficult to polish the surface of a molded product made of an inorganic hydraulic substance such as cement, and it is especially impossible to polish a molded product made of gravel or large-diameter aggregate.

The inventor of the present invention is the
In I@56-5!12209, a hydraulic composition was proposed in which cement was mixed with shirasu, that is, powder of volcanic ejecta. By adding water and curing at room temperature, it is possible to obtain a molded product with far superior strength than conventional cement molded products, and the heat energy required for manufacturing is one of the components of the cement manufacturing process. However, when used for tiles and other building materials, it is necessary to apply it to the surface using methods such as pongee coating, spray coating, and flame spraying, which are commonly used for conventional non-industrial products. When forming a film, this step alone requires a huge amount of thermal energy, and it is not possible to save on the original image.

In the present invention, each component particle of a silasul cement-based hydraulic molded product has a particle size of the same order of magnitude, and the molded product has a uniform phase, and the molded product is polished to create a beautiful appearance. It was completed by discovering that it can obtain the skin surface,
When this method is used, a hydraulic molded product having the required finished surface can be obtained without requiring a large amount of thermal energy as in the m1M formation described above.

The above-mentioned hydraulic molded product deteriorates (due to the action of carbon dioxide gas and sulfur salt) and loses its durability, but in order to prevent this, it must be polished! ! Prior to #, the surface is impregnated with sweetening resin to improve durability, bending strength, and water absorption resistance, and at the same time improve the beauty of the surface.

This will be explained in detail below using an example.

Example 1 After adding 400 cc and 8 liters of water and stirring well, 129 g of calcium hydroxide was added and stirred. The pH after stirring is approximately 6.
Met.

Add 8.5 # of Kl Dan^ furnace cement (water, γ slag, Portland cement, etc. and hardware) and 1.5 kg of calcium sulfate and stir well.The pH will be about 12, so the water content is about Dehydrate it to x7wt*, add a small amount of a softening agent such as methyl cellulose, and use an extruder to form a plate? ! Take it out and cut it into tile shapes.

Leave to dry for 1 hour at room temperature, then apply acrylic resin to melamine resin paint to a depth of about 311cm or more below the surface.
After the solvent is evaporated and the resin is cured by heating at about 120° C. for 4 ℃, the surface is polished in three steps using No. 600, No. 800, and No. 1200 sandpaper to obtain a tile.

After drying the whitebait in the sun, separate it, add 1241 whitebait powder with a particle size of 2.0 to 3 F+s, omm, and @ degree and 3 to 1 liter of slaked lime to 1001 J of water and mix to 90 to 100.
After stirring at ℃ for about 30 minutes, the total volume becomes about 80 liters.

When 8 liters of 5-sulfuric acid is added to this and stirred, the pH becomes approximately 8. This was dehydrated until the water content was about 17vt, and a small amount of a lubricant such as methyl cellulose was added, and then divided into three batches. Titanium white, Bengara, and Prussian blue were added as inorganic pigments to each batch, and the three batches were mixed. All together, extrude into a plate shape using an extruder and cut.

After curing for one week at room temperature, dry and apply methyl methacrylate-to-acrylonitrile copolymer paint approximately 5 m1 below the surface.
Impregnated to a depth of m, heated and dried to about 80c, then No. 600.
The surface is polished in three stages using No. 800 and No. 1200 sandpaper to obtain building materials such as interior boards, exterior boards, tiles, etc. that have flowing patterns.

In addition to the acrylic resin to melamine resin type and methyl methacrylate-toracrylonitrile copolymer type described in the above examples, there are a wide range of paints that can be used in the present invention, such as acrylic to urea type, methyl methacrylate type, and styrene type. Any appropriate impregnation method such as dipping, brushing, spraying, etc. may be used, and the impregnation depth may range from 3 to 5 luml or more.

In both Examples 1 and 2 above, the tile was impregnated with synthetic resin and polished according to the present invention, and the inventive product was 90%
~100kg/cd, or 1.5~j compared to conventional products! However, the absorption rate is 2-3% for traditional fired tiles and 11% for magnetic tiles! On the other hand, the product of the present invention is OL (that is, unmeasurable), and it goes without saying that it is significantly superior in terms of gloss and other appearance compared to conventional products, and the degree of polymerization during impregnation with paint is significantly lower. When the volatility is high, the paint on and near the surface may volatilize and may not produce the desired effect.
If the viscosity of the paint is too high, such as unsaturated polyester paint, it may not be possible to impregnate it to the desired depth. Add monomer to adjust viscosity.

As a method for molding the hydraulic molded product, in addition to the extrusion molding shown in the above embodiments, layered pressure molding using a press can of course be used. Particularly in the case of extrusion molding, when crushed marble particles or pearlite particles are mixed into the compound, the particles swell slightly after extrusion and exhibit a unique lustrous pattern.

As described above, the present invention consists of a step of impregnating the surface of a silasul cement-based hydraulic molding with a synthetic resin and polishing the surface. Therefore, the present invention requires no or almost no thermal energy and is low in cost. It has the characteristic effect that a molded product with excellent quality can be obtained.

Procedural amendment (voluntary) January 3, 1981 1, Indication of the case 1988 Patent Application No.! 31162 No. 2, Name of the invention: Surface finishing method for hydraulic moldings, Relationship with the amended case Patent applicant: Toki Fukuju (# amount or 2 people) 1. Agent: Kasu, Fukuoka Prefecture, 811-24 aSS Kurimachi Oaza Wada 1043 5δ, subject of amendment 7, attached document catalog correction specification 1 copy σT Hiki
Description Title of the invention A method for finishing the surface of hydraulic molded products Claims A process of impregnating the surface of a molded product obtained by adding cement and water to whitebait powder and hardening it with synthetic moulding, and polishing the surface. Characteristic surface finishing method for hydraulic molded products.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for finishing the surface of a hydraulic molded article, and particularly to a method for finishing the surface of a hydraulic molded article whose main components are whitebait powder and cement.

It is no exaggeration to say that it is impossible to finish the surface of molded products made of inorganic hydraulic materials such as cement by polishing, especially when large-diameter aggregates such as gravel are mixed in.

In Japanese Patent Application No. 156-112208 and Japanese Patent Application No. 56-212209, the present inventor has proposed hydraulic molded products in which mento is mixed with whitebait, that is, powder of volcanic ejecta. By adding water and curing at room temperature, it is possible to obtain a molded product with far superior strength compared to conventional cement molded products, and the heat energy required to manufacture the cement. Although it is hardly necessary unless the manufacturing process is taken into consideration, glazes are commonly used in conventional products when used for mail and other building materials.
Methods such as abrasive waxing and flame spraying (therefore, when forming a surface K11i film, a large amount of thermal energy is required only for this step, and cost reduction cannot be achieved.

In the present invention, each component particle of the silasul cement-based hydraulic molding has a particle diameter of approximately the same order and is completed by molding ratio. Hydraulic moldings with the required finished surface are obtained without requiring energy.

The above-mentioned hydraulic molded product deteriorates due to the action of carbon dioxide gas or am salt, and its durability is impaired. To prevent this, the surface is impregnated with a synthetic resin prior to polishing to improve durability and bendability. Improves strength and water absorption resistance, and at the same time improves surface appearance.

Examples will be explained in detail below.

Example 1 After drying whitebait in the sun, it was sieved to obtain grains g 2. Less than Omm
5.0 Shirasu powder 1f SQK98- below MIN1
Add 400 cc of sulfuric acid and 8 liters of water, stir well, and then add 12 # of calcium hydroxide and stir. The pH after stirring was approximately 6.

Add KBil high F cement (mixture of equal amounts of water slag and Bortland cement) 8.5 Itf, calcium sulfate l, and 5# and stir well. 1''1 ytd [dehydrated to give a small amount of plasticizer, such as methyl cellulose, and extruded using an extruder] and cut into tiles.

After curing for one hour at room temperature, drying, immersing acrylic resin to melamine resin paint to a depth of about 3 ymym or more below the surface, heating for about 120'CK to complete solvent volatilization and resin curing, No. 600, The surface is polished in three stages using No. 800 and No. 1jioo sandpaper to obtain tiles.

Example 2 Whitebait was dried in the sun and then sieved to obtain a particle size of 2.0 m or less to 5 m.
．． 0! Add 12 pieces of whitebait powder and slaked lime S# to 100 liters of water and heat to 90 to 100°C while stirring.
After stirring for about 50 minutes, the total volume becomes liters of SO. When 8 liters of 5-sulfuric acid is added to this and stirred, the pH is approximately 8K.
Ikru. To this, 1500g of blast furnace water slag and 1500g of Portland slag as a stimulant were added, and the moisture content was approximately 1.
After dehydrating until it reaches 7vt and adding a small amount of plasticizer 9, such as methyl cellulose, it is divided into S batches, and inorganic pigments such as titanium white, Bengara and Prussian blue are added to each batch, and the champions are put together into an extruder) Extrude and cut into a plate.

After curing for one week at room temperature, dry and apply methyl memethacrylate to acrylonitrile copolymer paint approximately 5 ym below the surface.
Impregnated to a depth of ym and dried by heating at approximately sO'cK 600
Use No. 3, Soo No., and 1200 No. sandpaper.
Interior board that has a flowing pattern by polishing the surface in stages,
Building materials such as exterior boards and tiles can be obtained.

Synthetic resins that can be used in the present invention include acrylic resins to melamine resins, methyl methacrylate to nitrile copolymer systems as well as acrylic to urea resins as described in the above examples.
A wide range of materials such as methyl methacrylate and styrene can be used, and impregnation methods include dipping, brushing,
Any suitable method such as spraying may be used and the depth of impregnation may range from 3 to 511 m or even more.

Comparing the tiles of Example 1.2 and the present invention which were impregnated with a synthetic resin and polished, and the tile of the control example in which this was not done, the bending stress of the control example was 57#.
/d Yang degree, whereas the product of the present invention has a degree of 90 to 100 #/d.
c11, that is, reaching 1.5 to 2 times that of conventional products, and the water absorption rate h of this conventional fired tile is 2 to 3-1, 3 to 10% for fibre-textured tiles, and 10- or more for ceramic tiles. While the porcelain tile reaches 1-, the product of the present invention has 0, that is, it cannot be measured, and it goes without saying that it is significantly superior to the conventional product in terms of i-9 luster and other external properties. If the degree of polymerization during impregnation is extremely low and volatility is high, the synthetic resin on and near the surface may volatilize and the desired effect may not be achieved, so in this case, remove the area by polishing. On the other hand, if the viscosity of a synthetic resin such as unsaturated polyester is too high, it may not be possible to impregnate the resin to the desired depth, so a monomer with low viscosity such as styrene or methyl methacrylate is added to adjust the viscosity.

As a method for molding the hydraulic molded product, in addition to the extrusion molding shown in the above embodiments, plastic pressure molding using a press can also be used. Especially when it comes to extrusion molding, it is great for mixed dough! When crushed particles, pearlite particles, etc. are mixed into L, the particle portion swells slightly after extrusion and exhibits a unique glossy pattern.

As described above, the present invention consists of impregnating the surface of a silasul cement-based hydraulic molding with a synthetic resin and polishing the surface, so that it requires no or almost no thermal energy, is low in friction, and has an excellent appearance. It has the characteristic effect that nine molded products can be obtained.

Claims (1)

[Claims] A method for finishing the surface of hydraulic molded products, which is characterized by impregnating the surface of the molded product obtained by adding cement and water to whitebait powder and hardening it, and then impregnating the surface with a synthetic resin and polishing the surface.