KR20030079473A - Porous insulation panel for building interior material and its production method - Google Patents

Abstract

PURPOSE: Provided is a method for producing a porous heat-proof panel for construction which can prevent the dangers related to the use of an additional foaming agent by the self-foaming of the mixture while the method can make the uniform foaming. CONSTITUTION: The method for producing a porous heat-proof panel for construction comprises: the step(100) for grinding a silica(11), loess(12) or diatomaceous earth(13); the step(200) for screening the ground silica, loess or diatomaceous earth to the size of 300 mesh or less; the step(300) for mixing 100 parts by weight of water glass with 20-50 parts by weight of at least one of the silica, loess or diatomaceous earth to form a slurry mixture(15); the step(400) for half-molding by charging the mixture(15) into a square box type casing of which the top is opened; the step(500) for drying and foaming the mixture in the casing at a drying furnace in which microwaves are emitted; the step(600) for heating and baking the dried and foamed mixture(16) in a heating furnace at 800-900 deg.C; and the step(700) for cutting the baked and rectangular parallelepiped shaped heat-proof material(17) to form multiple heat-proof panels(18).

Description

Porous insulation panel for building interior material and its production method

The present invention relates to a porous insulating panel foamed with a mixture of at least one of silica, ocher or diatomaceous earth in water glass and a method for producing the same, and more particularly to at least one of silica, ocher or diatomaceous earth in 100 parts by weight of water glass The present invention relates to a porous insulating panel for construction and a method of manufacturing the same, which are fired after drying and foaming microwaves in a kneaded mixture mixed at a ratio of 20 to 50 parts by weight.

Although various forms of environmental pollution have occurred with the development of industry, the rise of sea level due to global warming has caused a serious situation of land shrinkage, and the global warming phenomenon can be explained by various factors. Excessive carbon dioxide emissions from burning fossil raw materials are known as the main culprit, and efforts are being made to reduce carbon dioxide emissions in each country.

In order to reduce CO2 emissions from main CO2 sources such as automobiles, various factories, thermal power plants, and home heating, the general public must directly reduce the CO2 emissions by maximizing the efficiency of fossil fuel burning devices or developing alternative energy. It is very difficult to contribute.

However, by saving energy used in everyday life, people can contribute to reducing CO2 emissions. The most basic way to reduce energy used in daily life is to insulate people's living and working spaces. For example, a significant amount of carbon dioxide emissions could be reduced by reducing the consumption of cooling and heating energy through thermal insulation of buildings.

However, the conventional thermal insulation materials used to insulate the most basic buildings to reduce carbon dioxide emissions as described above have a very bad effect on inhalation to the human body or cause serious environmental pollution when disposed of. Looking closely, there are the following problems.

In general, the heat insulating material is classified into an insulator, a heat insulating material, a heat insulating material, and a fireproof heat insulating material used at about 100 ° C. or less, 100 to 500 ° C., 500 to 1,100 ° C., and l, 100 ° C. or more, respectively. It is preferable that the thermal conductivity of is small, but in most cases, the thermal conductivity is not so small, and in most cases, the thermal insulation of the air trapped in the pores by being porous to reduce the thermal conductivity is used.

Among the heat insulating materials according to the use temperature, it is mainly used for the insulation of 100 ~ 500 ℃ and the heat insulating material of 500 ~ 1,100 ℃, and it is divided into organic and inorganic materials according to the type of material. Suitable organic materials include cork, cotton, felt, cork carbide, foam rubber, etc., and inorganic materials that can be used at high temperatures include asbestos, glass wool, quartz wool, diatomaceous earth, magnesium carbonate powder, magnesia powder, and silicic acid. Calcium, pearlite and the like.

Among the various types of heat insulators, inexpensive and light, they are widely used as heat insulators of general buildings, and also called 'styrofoam'. It is widely used not only for thermal insulation of buildings but also for various packing materials for transportation, but it emits toxic gas in case of fire, and inhalation of this gas is not only fatal to human body, but also causes serious environmental pollution because it is difficult to disassemble naturally during disposal. There is a problem done.

In addition, as a representative heat insulating material of the inorganic material may be asbestos, also called asbestos, bar, as well as a heat insulating material used in various construction materials such as asbestos slate, brake lining, etc. It has a fatal drawback that causes fatal drawbacks, and its use is gradually limited. Rock wool contains cancer-causing ingredients, and glass fiber is known to cause fatal damage to the heart when inhaled by the human body. Have many problems.

In order to solve the problems of the conventional thermal insulation materials as described above, although environmentally friendly insulation materials such as ocher or waste paper were developed, there are heavy drawbacks compared to styrofoam or urethane foam, and the pores by foaming to increase the insulation effect while reducing the weight. In addition to forming a heavy, but not as easy to foam because the weight and weight is lower than a synthetic resin such as styrofoam, there are a number of problems, such as difficult to handle when using a chemical foaming agent and the risk of fire.

The present invention is to manufacture a heat insulating material made of a natural friendly material that can solve all the problems of the conventional various heat insulating materials, using natural friendly materials such as silica or loess and to form pores on the surface and inside, It is an object of the present invention to provide a porous insulating panel and a method of manufacturing the same having high manufacturing productivity by allowing the foaming degree to be easily controlled without supplying a foaming agent in itself.

1 is a manufacturing process flow diagram of the method of the present invention.

Figure 2 shows an embodiment of the present invention dry mixture and heat insulating material,

(A) is a perspective view of a dry mixture or a cuboid insulating material,

(B) is a perspective view of the insulation panel.

((Explanation of symbols for main part of drawing))

16. Dry Mix 17. Cuboid Insulation

18. Insulation panel

The above object of the present invention is achieved by dielectric heating using water glass and microwave, the main composition of the insulating panel and serves as a binder.

In the porous insulating panel for construction of the present invention, at least one or more of silica, loess or diatomaceous earth is uniformly mixed at a ratio of 20 to 50 parts by weight with respect to 100 parts by weight of water glass to form a mixture in the form of dough, and the microwaves are radiated to the mixture. It is made by firing at high temperature after drying and foaming. Looking at the role of each component in detail.

Water glass serves as a binder that binds silica, loess or diatomaceous earth, and at the same time, a medium in which numerous pores are formed inside and outside of the insulation panel of the present invention, and the alkali silicate salt obtained by melting silicon dioxide and alkali into a concentrated aqueous solution. If the amount is less than the standard amount, the bonding strength of the insulation panel falls and at the same time, the amount of pore formation is insufficient, resulting in poor thermal insulation performance.

Quartzite is a mineral mainly composed of quartz and is used as a raw material for glass and ceramics. If it is less than 20 parts by weight with respect to 100 parts by weight of water glass, the strength of the final insulation panel decreases and the brittleness by the solidified water glass is increased. Exceeding the portion increases the manufacturing cost and is difficult to foam, as well as the weight of the insulation panel increases and the size of the pores to be formed is also fine, resulting in poor thermal insulation.

Ocher is a building material that has been used for a long time and is known to be beneficial to the human body. Recently, diatomaceous earth is a material capable of controlling humidity to absorb or dissipate moisture. As a weight ratio such as silica, it may be used alone to replace silica, but two or more may be mixed and used within the weight ratio range.

Insulating panel of the present invention configured as described above, foaming occurs in the process of drying the mixture by spinning the microwave in the mixture of the dough state prepared by uniformly mixing at least one or more of water silicate, ocher or diatomaceous earth and water glass As a result, a number of pores are formed inside and outside of the final insulation panel, and the mixture is formed by the numerous pores formed at the time of dry foaming of the mixture depending on the content of the silica and the like. Four times the volume expansion is achieved to have a porosity of 60% to 80%.

The microwave is an electromagnetic wave having a frequency of 300 MHz to 300 GHz in accordance with a radio wave method, and transmits glass, paper, etc., but is reflected by metal and easily absorbed by food or water, and the absorbed electromagnetic energy is changed to heat. It has a property of generating heat.

That is, when the microwave is radiated to the heating object, the dipoles of the liquid molecules with relatively weak binding force of the molecules contained in the heating object rotate or vibrate very rapidly as the polarity changes according to the frequency of the microwave. The frictional heat is generated between molecules, and this is the source of heating and drying the liquid material, and this heating method does not supply heat from the outside like conventional conductive heating or radiant heating, but inside the radiated object of the microwave And outside are simultaneously heated. This heating method is called dielectric heating.

The microwave which is generally used for the dielectric heating has a frequency of about 2450 MHz and is generated by a magnetron, which is a special vacuum tube, and the microwave generated by the magnetron is induced in an oven or a furnace and reflected from the surrounding metal wall to be heated. Is absorbed in.

As the metal reflecting the microwave, stainless steel or iron plate is used, and when the microwave goes straight and is reflected from the metal surface, the traveling wave and the reflected wave are synthesized to create a strong and weak place in the electric field. It is necessary to make the heating car (加熱 差) so as not to touch, and for this purpose, a method of changing the electrical state of the oven or the furnace by moving the heating element or moving the irradiated microwave should be applied. In the case of the oven is used to rotate the saucer, but the furnace is applied to rotate the metal microwave stirring blades.

The dielectric heating method using the microwaves is effective when simultaneously heating a material having a low thermal conductivity from the surface to the center of the object to be heated in a short time. The microwave is radiated onto a mixture of dough formed of water glass and silica. There is a technical feature of the process of the invention in that the mixture is dried and foamed simultaneously.

That is, the evaporation of a liquid substance such as water contained in the mixture of the kneaded state without using a blowing agent, and induces a foaming process in which bubbles are generated by the evaporated liquid substance.

After grinding and screening the silica, loess or diatomaceous earth constituting the insulating panel of the present invention, at least one or more of silica, loess or diatomaceous earth powder is mixed with water glass to make a mixture of dough, and the mixture is semi-molded Based on the process flow diagram shown in Figure 1, the manufacturing method of the present invention consisting of a series of multiple processes of drying, foaming, firing and cutting are as follows.

The crushing step 100 is a process of uniformly mixing at least one or more of the silica (11), loess 12 or diatomaceous earth (13) with the water glass (14), and pulverizing it into a powder so as to be suitable for molding.

The screening step 200 is a process for screening pulverized silica, loess or diatomaceous earth powder to a size of 300 mesh or less, and particles larger than 300 mesh are subjected to a regrinding process. If the silica or loess or diatomaceous earth powder exceeds 300 mesh, the filling rate of the silica or loess or diatomaceous earth constituting the insulation panel is reduced, the strength of the insulation panel is lowered, the porosity is also reduced.

The mixing step 300 is a step of uniformly mixing at least one or more of silica, ocher or diatomaceous earth powder into the water glass 14 at a weight ratio of 100: 20 to 50 to form a mixture 15 in a kneaded state. The composition ratio is controlled within the range to control the strength and porosity of the insulation panel.

The semi-forming step 400 is a process of charging the mixture 15 into a casing on a rectangular box whose top is open to dry in a constant shape, it is possible to casing of various shapes depending on the final product, but the heat insulating material is generally square plate Since the shape of the square casing is usually used to cut into a number of square plate shape.

The dry foaming step 500 is a process in which the mixture 15 filled in the casing is foamed together with drying in a drying furnace in which microwaves are radiated to form the dry mixture 16 shown in FIG. 2, wherein the casing is subjected to microwaves. Moisture or liquid components contained in the mixture inside are heated by microwaves to generate bubbles, and this process acts as a foaming process. As a result, the mixture in the casing is dried in the shape of a cuboid and numerous bubbles inside and outside thereof. Will have

The firing step 600 is a process of heating and drying the dry mixture 16 to a temperature of 800 to 900 ° C. in a heating furnace to form a rectangular parallelepiped heat insulating material 17 shown in FIG. 2, wherein the heating temperature is 800 ° C. If not, the strength of the insulation panel is insufficient, and if it exceeds 900 ℃ energy consumption is high and cracks are likely to occur due to overheating.

The cutting step 500 is the final process of cutting (or turning on) the dried and calcined cuboidal insulator 17 into a plurality of insulating panels 18.

In the method of the present invention configured as described above, when the casing used in the semi-forming step 400 to the shape of the final insulation panel, the cutting step 700 may be omitted, but in the dry foaming step 500 Considering the volume change of the mixture due to bubble generation, it is preferable to make the casing large and to make the insulating panel of the final size through the cutting step 700.

In addition, bar cooling should be performed before cutting the rectangular parallelepiped heat insulating material 17 which has passed through the firing step 600. If cooling of the rectangular parallelepiped heat insulating material 17 proceeds rapidly, cracks may occur. .

As described above, in the method of manufacturing a porous insulating panel for construction of the present invention, by using the microwave foamed by the foam generated by evaporation of moisture contained in the mixture itself, the foaming itself without the external foaming agent, the safety of using the external foaming agent It is easy to control the uniform foaming and foaming degree without the risk of an accident.

Claims (3)

As a heat insulating material fired mainly from water glass, at least one of silica, ocher or diatomaceous earth is mixed and formed in a ratio of 20 to 50 parts by weight with respect to 100 parts by weight of water glass, and the internal and external structures are formed by the radiation of microwaves. Construction porous insulating panel, characterized in that the porous tissue. According to claim 1, wherein the porosity of the porous structure is a porous insulating panel for building, characterized in that 65 to 80%. Grinding (100) silica (11) or loess (12) or diatomaceous earth (13); A screening step (200) for sorting the ground silica or loess or diatomaceous earth powder to a size of 300 mesh or less; A mixing step 300 of mixing at least one of silica, loess or diatomaceous earth in a proportion of 20 to 50 parts by weight to 100 parts by weight of water glass 14 to form a mixture 15 in a dough state; A semi-forming step (400) of charging the mixture (15) into a casing on an open rectangular box; Drying and foaming the mixture filled in the casing in a drying furnace in which microwave is emitted; A firing step 600 of heating and firing the dried foamed dry mixture 16 at a temperature of 800 to 900 ° C. in a heating furnace; And a cutting step (500) of cutting the fired rectangular parallelepiped insulating material (17) into a plurality of insulating panels (18).