KR100778333B1 - Noncombustible Board and Manufacturing Method of Thereof - Google Patents

Abstract

The present invention is a non-flammable, eco-friendly new building material, a non-combustible board using a pure inorganic material and industrial pulp that improves water resistance, flexural strength, flexural strength and brittleness, which are disadvantages of a number of previously released non-combustible boards. The present invention relates to a non-combustible board having sufficient flexural strength while suppressing corrosion of metals caused by chlorine ions, which is a fatal disadvantage of conventional magnesium boards, and at the same time without using fiberglass. Non-flammable board according to the present invention is based on 100 parts by weight of magnesium oxide extract mixture solution prepared from 5 to 20 parts by weight of dry wood pellets and 60 to 100 parts by weight of water, 5 to 30 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp, 20 to 35 parts by weight of plant powder, and 10 to 30 parts by weight of inorganic filler are mixed and cured. In addition, the production method of the non-combustible board 1) preparing an extraction mixture solution by mixing 5 to 20 parts by weight of dry wood pellets and 60 to 100 parts by weight of water based on 100 parts by weight of magnesium oxide; 2) 5 to 30 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp, 20 to 35 parts by weight of vegetation powder, and 10 to 30 parts by weight of inorganic filler to the extraction mixture solution of step 1) It characterized by the step of forming into a board form. The non-combustible board manufactured according to the present invention has excellent flexural strength, flexural strength when wet, total absorption rate, surface absorption rate, water content and water resistance, compared to magnesium board or magnesia concrete produced by the conventional method, and is similar to wood. With its features, it can be easily cut with a knife and similar tools, and it solves the problem of corrosion caused by the elution of chlorine ions, and expresses sufficient bending strength without using glass fiber used for magnesium board. The problem of glass fiber dust caused by fiber was solved. In addition, the non-flammable board according to the present invention has a fine processing property suitable for tenon (tenon) and mortise (mortise) processing necessary for applying to the flooring material, has the advantage of having a non-combustible performance corresponding to the first class flame retardant.

Building materials, non-combustible, magnesia, eco-friendly, board, woodfish, agarose, magnesium oxide, magnesium sulfate, vegetation powder, curing, micromachinability, tenon, mortise

Description

Noncombustible Board and Manufacturing Method of Thereof}

The present invention relates to a non-combustible non-combustible board similar to wood, such as tenon and maltide, which has improved corrosion resistance, water resistance, and flexural strength without using glass fiber as a non-combustible, environmentally friendly building material, and a method of manufacturing the same.

The wood starfish used as the main raw material in the present invention is a material used for the waterproofing of gray walls or wooden ships in a traditional manner, and the wood starch was boiled in water to make agar. Agar is an extract of wormwood, a viscous complex polysaccharide with no chemical activity, harmless to human body, and generally has a characteristic of forming a gel by holding water up to about 100 to 200 times the mass of solids. Buttweed, depending on the area of origin, contains about 40% agar, and agar is a mixture of 70% agarose and 30% agarose pectin. The agarose has a form in which agarose composed of β-D-galactose and 3,6-anhydrous-L-galactose is connected like a chain, and the agarose pectin is β-D-galactose and 3,6-anhydrous- It is known that a sulfuric acid group, uronic acid, pyruvic acid and the like are bound to a mixture of L-galactose. The ability to form the gel of the agar is an inherent property of agarose, and the agar solution mixture at a concentration of 0.5 to 3% is melted at a temperature of 35 ° C. or higher to become a uniform viscous solution, and solidified at a temperature of less than 35 ° C. Form a gel.

Wood, plywood, gypsum board, bamite, magnesium board and the like has been used as a conventional board of the interior and exterior materials for building. However, wood and plywood are vulnerable to water and fire, and they are unsuitable for residential environment by releasing formaldehyde and volatile organic compounds, which are harmful to human body, as an antiseptic used to prevent corruption. It is a cause of the back, and also has the disadvantage that the durability is weak. Gypsum board has a disadvantage in that the bond strength falls and absorbs a large amount of water when it comes in contact with water. Antibacterial gypsum board is released as an improvement product for this, but it is still unsanitary due to the growth of mold. Bamlite has improved water resistance, but has been severely warped and contained in carcinogens. Magnesium board is a non-flammable and ceramic board among the internal and external materials for the electric shaft listed above, but has a high strength as a ceramic board, but has a weak brittleness, which is broken even by a small impact such as a product value.

Magnesium board, like magnesia cement, is composed of magnesium oxide and magnesium chloride, and is a building material developed and commercialized in the 19th century.

Magnesia cement and magnesium boards are subjected to a step in which a hydrate of hydrooxy chloride of magnesium metal is produced between active magnesium oxide and magnesium chloride. Similarly, conventional methods have been proposed to proceed with the hydration reaction by using magnesium sulfate instead of magnesium chloride or by mixing magnesium chloride and magnesium sulfate.

mMgO + MgCl ₂ + nH ₂ O → mMgO · MgCl ₂ · nH ₂ O

mMgO + MgSO ₄ + nH ₂ O → mMgO · MgSO ₄ · nH ₂ O

In the above scheme, m and n are not constant, m is usually proportional to the mixing ratio of magnesium oxide and magnesium chloride or magnesium sulfate, but most often 5 to 10, n is proportional to the amount of water added, and n is 11 to 16 Converge as you near.

The magnesia cement and magnesium board has a high initial strength and high bonding ability with wood, but may also be used by adding vegetation powder. However, the magnesia cement and magnesium board is weak in water. It is used only in special cases by limiting the content of powder to 20% by weight. However, such a magnesium board has a limit in water resistance, and when the content of vegetative powder is small, brittleness is high, so the warpage is low and the bending strength is low. In addition, such a magnesium board has a problem in that the processed part is cracked and lost in the micromachinability such as tenon and maltize processing required for floor manufacturing.

In order to make up for the above disadvantages, U.S. Patent No. 5,766,337 discloses phosphate-bonded magnesia cement by reaction of water-soluble ammonium polyphosphate and magnesium oxide, and phosphate-bonded magnesia cement has a relatively short skinning that can be used for rapid curing. There is an advantage of having a setting time, and according to Norwegian Patent Publication No-PS 151035, it is known that the water resistance is significantly increased when ethyl silicate is contained in 0.5 to 2% by weight. U.S. Patent No. 4,820,345, submitted for the purpose of strengthening water resistance, provides a double layer board using magnesia cement and lignin sulfonate, chemically activated fumed silica, and alkali silicate. A method of treating a mixture of well-classified magnesia with wood fibers, inert silica powder, aqueous magnesium chloride, and sodium silicate solution at a temperature of 15 to 50 bar at a temperature of 120 to 220 ° C. for 3 to 20 minutes is provided.

Korean Patent Laid-Open Publication No. 2001-0100591 discloses 60 to 70% by weight of magnesium chloride, 2 to 20% by weight of plant fiber, 2 to 4% by weight of gypsum powder, 1 to 2% by weight of glue, and 1 to 2% of sulfide based on 100% by weight of magnesium oxide. Background of the Invention Compositions for making boards comprising weight percent and boards made therefrom are known.

In the preceding invention, the method of adding ethyl silicate among the methods for strengthening the water resistance brings about an increase in the cost of the product, and thus the economical efficiency is lowered. Peeling and cracking occur. The addition of lignin sulfonate or glue improves wood bonding, but it is very water-soluble because it is a water-soluble adhesive.When adding alkali silicates such as sodium silicate, chloride ions of magnesium chloride and alkali of alkali silicates react Alkali is accompanied by precipitation and a decrease in strength.

In addition, the existing magnesium board uses glass fiber as a reinforcing material, which raises the problem of dust scattering of the glass fiber, and due to the hydration reaction of the hydrooxy chloride of magnesium oxide and magnesium chloride, Chlorine ions are continuously eluted, which has a fatal drawback of corrosive substances such as iron. Magnesium sulfide is used in place of magnesium chloride in US Pat. No. 4,003,752, Japanese Patent No. 23,727 / 61, Japanese Patent Publication 26,420 / 64, and Chinese Patent CN1358684 to solve the problem of corrosion. However, in the case of using magnesium sulfide instead of magnesium chloride, the curing speed is much slower than the hydration reaction of magnesium chloride, and the bonding strength is much weaker than that of using magnesium chloride when organic materials such as vegetation powder and wood fiber are used as fillers.

In order to solve the above problems, US Patent Publication No. 4,003,752, Japanese Patent Publication No. 23,727 / 61, and Japanese Patent Publication No. 26,420 / 64 use magnesium oxide calcined at less than 600 ° C. having high activity with magnesium sulfide. The total organic filler content was added to 20% by weight or less to maintain a moderate strength, and the magnesium board prepared in this way was highly brittle, but could not be cut using a knife and similar tools.

In addition, while the rate of hydration of magnesium sulfide is relatively slow, the drying speed is relatively high, but when the aqueous solution of magnesium sulfide is dried, crystals of magnesium sulfide, which are supersaturated, are formed inside, and when water is met, magnesium sulfate is dissolved. There is a disadvantage that the powder is deposited on the surface as it is eluted or the surface of the product dries. In addition, when a powder is deposited on the surface of the product, paint, varnish, HPM, LPM, paper, etc., which are surface finishing materials of the product, are removed and removed, thereby showing a fatal problem as a building material.

Therefore, in the present invention, in view of the problems of the prior art as described above, without the use of glass fibers, corrosion resistance, water resistance, flexural strength, the flexural strength when wetted is improved, the dissolution of magnesium sulfate and precipitation on the product surface The present invention provides an environmentally friendly building material and a method of manufacturing the same, which have a processing performance similar to that of wood capable of processing such as tenon and maltize and grinding, and which have non-combustible performance. To provide a non-combustible board for building interior and exterior materials and furniture.

The present invention relates to a non-flammable, environmentally friendly building material, and to a non-combustible board having a fine processing similar to wood, such as tenon and maltide, which has improved corrosion resistance, water resistance, and flexural strength without using glass fibers, and a method of manufacturing the same. The content of all the raw materials for producing the non-flammable board according to the invention is described based on 100 parts by weight of magnesium oxide, the non-flammable board according to the present invention based on 100 parts by weight of magnesium oxide 5 to 20 parts by weight of dry wood grinding powder and water 60 to 100 parts by weight of the extraction mixture, magnesium sulfate 5 to 30 parts by weight, magnesium oxide 100 parts by weight, industrial pulp 5 to 20 parts by weight, plant powder 20 to 35 parts by weight and inorganic filler 10 to 30 parts by weight It is characterized by being produced by curing. In addition, the production method of the non-combustible board 1) preparing an extraction mixture solution by mixing 5 to 20 parts by weight of dry wood pellets and 60 to 100 parts by weight of water based on 100 parts by weight of magnesium oxide; 2) 5 to 30 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp, 20 to 35 parts by weight of vegetation powder, and 10 to 30 parts by weight of inorganic filler to the extraction mixture solution of step 1) It characterized by the step of forming into a board form.

5 to 20 parts by weight of woodworm dry crushed powder and 60 to 100 parts by weight of water based on 100 parts by weight of magnesium oxide in the step 1) in an autoclave at a pressure of 0.5 to 10 kgf / cm 2 and a temperature of 110 to 180 ° C. Maintain 60 minutes to prepare an extract mixture solution containing 2 to 8% by weight of agar.

The urticaria used in the present invention contains agar having a solid content of 40% by weight on average, preferably dried in a state of removing impurities, and dehydrated at 105 ° C for 1 hour to use a dried product having a water content of less than 10% by weight. The wood starch dried material may be ground by using a wood starch fiber having a length of 5 to 30 mm, and the grinding may be performed by a conventional grinding method, but it is most preferable to grind using a cutter-type grinder.

The wormwood crushed product is used as a raw material of the non-combustible board as it is even after the extraction of agar serves as a reinforcing material to reinforce the strength of the board.

On the other hand, the agar extracted from the loot is present as a highly viscous liquid at a temperature of 35 ℃ or more, but has a feature of forming a gel at a temperature of 35 ℃ or less, maintaining the temperature of 35 ℃ or more of the non-combustible board according to the present invention After mixing with other materials to make a board form and lowering the temperature to 35 ℃ or less, the agar ingredient forms a gel, the board becomes hard and workability is improved. The agar has excellent moisturizing properties to prevent evaporation of water during the hydrate formation reaction, thereby preventing supersaturation of magnesium sulfate and crystal growth of magnesium sulfate, thereby forming hydrate crystals of hydrooxy sulfide between magnesium oxide and magnesium sulfate. It can be a big advantage for growth. In addition, the water contained in the gel of the agar component participates in the hydrate formation reaction of the hydrooxy sulfide of magnesium, and the agar component forms a dehydrated film or fiber network to become a material for reinforcing the strength of the board.

Another advantage of the agar component is that water-soluble polymer materials such as CMC, glue, casein, starch, dextrin, rosin and shellac slow down the hydration reaction, whereas the agar component does not slow down the hydration reaction. The mechanism of the above polymer body on the hydration reaction rate cannot be precisely identified in the present invention, but the curing rate of the product is slowed down depending on the amount of the above-described water-soluble polymer is added, whereas in the case of the agar component, Does not affect

In the step 1) of extracting the agar from the wood starch dry ground product, it is preferable to use 5 to 20 parts by weight of wood starch dry ground products based on 100 parts by weight of magnesium oxide, and the range of 10 to 15 parts by weight of wood starfish dry ground products is more preferable. Do. At this time, if the amount of dry wood grits are 5 parts by weight or less, the content of the agar is too small to reach the required bending strength of the board, if more than 20 parts by weight, the viscosity is too high, there is a problem that workability is rather deteriorated.

Step 2) is to dissolve 5-30 parts by weight of magnesium sulfate based on 100 parts by weight of magnesium oxide in the mixed solution of step 1) while maintaining the temperature of the extraction mixture solution of step 1) at 35 to 80 ℃, magnesium sulfate 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp, 20 to 35 parts by weight of vegetation powder and 10 to 30 parts by weight of an inorganic filler are mixed with the dissolved extract mixture solution to form a board preparation mixture.

Maintaining the temperature of the extraction mixture solution of step 1) 35 to 80 ℃, more preferably 50 to 60 ℃, based on 100 parts by weight of magnesium oxide 5 to 30 parts by weight of magnesium sulfate, more preferably 15 to 25 Add by weight to dissolve.

If the temperature is 35 ℃ or less, the mixed solution is difficult to form a gel uniformly, if the temperature is 80 ℃ or more there is a problem that the water evaporation is faster and the water content changes.

Magnesium sulfate is an industrially produced product, using anhydrous salts having a physical bond number of 0 and a hydrous salt having 1, 2, 6, 7, and 12 in the state of being bound to magnesium sulfate as a hydrate. The amount of magnesium is based on the amount of anhydrous salt except for the above hydrate, and in the present invention, magnesium sulfate heptahydrate is employed.

In addition, if the added amount of magnesium sulfate is less than 5 parts by weight acts as a cause of severe shrinkage and exhibits a decrease in water resistance and strength, and if more than 30 parts by weight of magnesium sulfate is supersaturated, a residual material that does not melt is generated and future board In the curing process, the saturated magnesium sulfate precipitates as a crystal, which causes a problem in that the water resistance is degraded by the water-soluble magnesium sulfate.

100 parts by weight of magnesium oxide and 5 to 20 parts by weight of industrial pulp, more preferably 10 to 15 parts by weight, 20 to 35 parts by weight of vegetation powder, and 10 to 30 parts by weight of an inorganic filler in the extract mixture solution in which magnesium sulfate is dissolved. The mixture is kneaded while maintaining at 35 to 80 캜, more preferably at 50 to 60 캜.

If the temperature is 35 ° C or less, the extraction mixture solution forms a gel so that the viscosity is too high, uniform mixing is difficult, if the temperature is 80 ° C or more, water evaporation is faster, there is a problem that the water content changes.

Magnesium oxide is calcined at 500 to 800 ° C. and uses 100 parts by weight of 200 mesh passes, industrial pulp is bleached or unbleached sulfite pulp, kraft pulp, soda pulp, crushed wood pulp, refiner pulp, heat treatment machine pulp, chemical ground wood One or a mixture of two or more selected from pulp and semichemical pulp may be used. It is preferable to use 5 to 20 parts by weight of industrial pulp based on 100 parts by weight of magnesium oxide, more preferably 10 to 15 parts by weight. At this time, if the content of the industrial pulp is less than 5 parts by weight can not meet the required flexural strength, if it exceeds 20 parts by weight can not meet the required flame retardant performance, rather, there is a problem that the flexural strength is lowered.

The vegetation powder is pulverized one or two or more mixtures such as wood powder, sawdust, rice straw, corn stalks, palm husks, pulverized powder, etc., and used as the content of 100 mesh, and the vegetation powder is 20 to 100 parts by weight based on 100 parts by weight of magnesium oxide. It is preferable to use 35 parts by weight. If the added amount of vegetation powder is less than 20 parts by weight, it is hard, but brittle and brittle, and there is a disadvantage in that fine processing such as forming irregularities is impossible. The lack of hydrate of the hydrooxysulfide of magnesium, which binds to, weakens the bond, and the content of organic matter is excessive, so that the non-combustible performance cannot be exhibited.

Inorganic fillers are used for the purpose of improving wear resistance, releasing far-infrared rays and increasing their strength.Also, 200 mesh passes through wollastonite powder, loess, dolomite, talc powder, clay, calcium carbonate, silica sand, titanium dioxide, alumina, zirconium dioxide, etc. Use one or two or more mixtures. The inorganic filler is preferably added in an amount of 10 to 30 parts by weight based on 100 parts by weight of magnesium oxide, and if the content is less than 10 parts by weight, the purpose cannot be reached. If the content exceeds 30 parts by weight, the product becomes brittle. I can't.

While maintaining the temperature of the board manufacturing mixture in a board forming mold for maintaining the temperature of 35 to 80 ℃ and applying a pressure of 0.5 to 1.5 ton / m ² to form a board or a board in a continuous roller 0 to 35 Curing is carried out in general air at < RTI ID = 0.0 > C < / RTI > for at least 10 days, preferably 15 to 30 days.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.

Example 1

After making the average fiber length of 20mm by using a cut cutter on the dried woodworm with a water content of 10% by weight or less, 12kg of the dried woodfish and 80kg of water were stirred at 110 ° C for 30 minutes at a pressure of 3kgf / ㎠ in an autoclave. An extract mixture solution was prepared. While keeping the temperature of the prepared extraction mixture solution at 55 ° C, stirring and dissolving 51 kg of magnesium sulfate heptahydrate, while maintaining the temperature, the mixed solution in which magnesium sulfate was dissolved was put in a kneader and passed through a 200 mesh sieve. 100 kg of magnesium oxide powder, 12 kg of unbleached semi-chemical pulp, 28 kg of wood powder 100 mesh passage and 20 kg of wollastonite 200 mesh mixture were mixed and kneaded for 20 minutes. 19 kg of the mixture was placed in a mold of 120 cm * 240 cm and molded by applying a pressure of 1 ton / m ² , and then cured in normal air for 15 days while maintaining the temperature at 25 ° C. After curing, sulfate elution, density, flexural strength, flexural strength and wetness were measured.

Comparative Example 1

In Example 1, except that 112 kg of water was added instead of the dried starfish, the rest of the composition and the manufacturing process were the same.

Comparative Example 2

Except for adding 51kg of magnesium chloride in place of magnesium sulfate in Example 1 and the rest of the composition and the manufacturing process was the same.

Table 1 shows the measurement results of the physical properties of the boards of the Examples and Comparative Examples.

TABLE 1

In addition, the non-combustible board manufactured by the method of Example 1 was subjected to tenon and maltise processing using the tenon processing equipment for manufacturing reinforced floor of Hanwha General Chemical Co., Ltd. There was no loss of machined surface.

The board manufactured according to the present invention is excellent in corrosiveness, water resistance, flexural strength, flexural strength when wet, and prevents dissolution of magnesium sulfate and precipitation on the product surface without using glass fiber, and has similar characteristics to wood. As can be easily cut with a knife and similar tools. In addition, it provides processing methods similar to wood that can be processed such as tenon, maltize, and grinding, and also provides a manufacturing method of eco-friendly building materials with non-combustible performance. There are possible advantages.

Claims (17)

Based on 100 parts by weight of magnesium oxide extract mixture solution prepared from 5 to 20 parts by weight of woodworm dry crushed powder and 60 to 100 parts by weight of water, 5 to 30 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp 20-35 parts by weight of vegetative powder and wollastonite powder, loess, dolomite, talc powder, clay, calcium carbonate, silica sand, one or two mixtures selected from titanium dioxide, alumina and zirconium dioxide, inorganic filler 10 Non-combustible board, characterized in that prepared by mixing and curing to 30 parts by weight. The method of claim 1, Extracted mixed solution prepared from 10 to 15 parts by weight of woodworm dry pulverized powder and 60 to 100 parts by weight of water, 15 to 25 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, and 10 to 15 parts by weight of industrial pulp based on 100 parts by weight of magnesium oxide , Non-flammable board, characterized in that it is produced by mixing and curing 20 to 35 parts by weight of plant powder and 10 to 30 parts by weight of inorganic filler. delete The method of claim 1, The extraction mixture solution is a non-combustible board, characterized in that it contains agar 2 to 8% by weight. delete The method of claim 1, Industrial pulp is one or more mixtures selected from bleached or unbleached sulfite pulp, kraft pulp, soda pulp, groundwood pulp, refiner pulp, heat treated mechanical pulp, chemical groundwood pulp, semichemical pulp Non-burning board. The method of claim 1, Vegetation powder is a non-flammable board, characterized in that one or two or more kinds selected from sawdust, rice straw, corn stalks, coconut shells, ground grinding. delete 1) preparing an extract mixture solution by mixing 5 to 20 parts by weight of woodworm dry crushed powder and 60 to 100 parts by weight of water based on 100 parts by weight of magnesium oxide; 2) 5 to 30 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 5 to 20 parts by weight of industrial pulp, 20 to 35 parts by weight of vegetation powder, and 10 to 30 parts by weight of inorganic filler to the extraction mixture solution of step 1) Molding to a board form; And 3) curing in normal air at 0-35 ° C. for 15-30 days; Non-flammable board manufacturing method characterized in that. The method of claim 9, Method for producing a non-combustible board, characterized in that in step 1) mixed with 10 to 15 parts by weight of dry wood pellets and 60 to 100 parts by weight of water based on 100 parts by weight of magnesium oxide. The method of claim 9, The method of manufacturing a non-combustible board, characterized in that the extraction mixture solution of step 1) is maintained while being maintained for 20 to 60 minutes at a pressure of 0.5 to 10 kgf / ㎠ and 110 to 180 ℃ in the autoclave. The method of claim 9, Method for producing a non-combustible board, characterized in that for maintaining the temperature of 35 to 80 ℃ in step 2). The method of claim 9, Method of producing a non-combustible board, characterized in that the molding of the board by applying a pressure of 0.5 to 1.5 ton / ㎡ in the mold in the step 2). The method of claim 9, 15 to 25 parts by weight of magnesium sulfate, 100 parts by weight of magnesium oxide, 10 to 15 parts by weight of industrial pulp, 20 to 35 parts by weight of vegetation powder, based on 100 parts by weight of magnesium oxide, in the extraction mixture solution of step 1) in step 2). And 10 to 30 parts by weight of an inorganic filler. delete delete delete