KR101150845B1 - The environmental building interior material capable of recycle and method therefore - Google Patents

Abstract

PURPOSE: An interior material for building is provided to improve flame retardance, not to occur harmful gas, to be able to be recycled, and to be manufactured by low cost. CONSTITUTION: An interior material for building is manufactured by mixing 48.8-54.3 parts by weight of urea resin mixture, 45-55 parts by weight of lime powder, and 0.7-1.2 parts by weight of inorganic pigment. The urea resin mixture consists of 62-67 wt% of urea resin, 30-35 wt% of pulp or cellulose, 0.5 wt% of stearic acid, and 0.1 wt% or less of formaldehyde. A manufacturing method of the interior material for building comprises: a step of mixing the urea resin mixture, lime powder and inorganic pigment, and a step of press-molding the mixture by putting into a mold heated to 160-170 °C by using hot press method with the pressure of 300 ton for 1 minute.

Description

The building material and its manufacturing method that can be pollution-free and recycle {The environmental building interior material capable of recycle and method therefore}

The present invention relates to various building interior materials used when building buildings, and more particularly, to building interior materials that can be produced inexpensively and flame-retardant, without generating harmful gases.

In general, various interior materials used when building buildings are made of various materials.

For example, a material used as a general building interior material uses a lot of SMC or aluminum, which is a kind of thermosetting resin.

However, the SMC is a kind of thermosetting resin such as FRP, which contains harmful carcinogens and glass fibers that penetrate the human body through the respiratory organs. On the other hand, there is a problem such that not only can not be recycled at all, but also takes decades to return to the natural state.

In addition, aluminum materials are light metals that are light, clean and easy to handle, but are often used as building interior materials. However, as the price of light metals increases internationally, they are expensive to be difficult to use as building materials. When used as a building material, there is a problem such as not only combustion at high temperature when a fire occurs, but also toxic gas harmful to the human body when burning.

In order to solve the problems of the existing general building interior materials, various technologies have been proposed, for example, "Patent plate using waste paper and waste fibers" of the Patent Registration No. 10-0427479, which was filed by the applicant of the present invention Manufacturing method ".

The patent uses waste paper and waste fibers that burn well, but do not produce relatively harmful gases to the body when combusted, while heating and compressing these waste papers and waste fibers by mixing them with synthetic resins. It is made by making a plate, overlapping the molded plate in several layers and then applying a flame retardant and a waterproofing agent.

However, the ceiling material according to the present invention, even if treated with a flame retardant and a waterproofing agent can not be burned when a high temperature heat is applied to a fire in the building, waste paper and waste fibers and synthetic resins are used as a basic raw material Therefore, not only does not generate harmful gases to the human body when the synthetic resin burns, but the ceiling material made of such synthetic resins did not completely solve the basic problem that recycling is impossible.

On the other hand, as another invention, "The manufacturing method of injection material mainly based on thermoplastic resin and pulp fiber and its injection material" of Unexamined-Japanese-Patent No. 1999-78981, and "Injection based on thermoplastic resin and pulp fiber of patent publication 1996-16853" Has been proposed.

The two inventions are basically the same, and the contents of these technologies are also light and combustible but use waste paper and waste fibers that do not generate harmful gases. Resin is used, and the type of thermoplastic resin used in the present invention is a fibrillated fibrous resin, and the product according to the present invention made using such a material also burns well and burns to the human body. Not only does it generate harmful gases, but it is impossible to recycle and the production cost is high, resulting in high consumer prices.

In addition, when the paper is used as a raw material as in the above inventions, there is a problem that it is difficult to mix due to its volume when mixed with the thermoplastic resin, resulting in poor workability, and thus a large amount of thermoplastic resin is required. There is also a disadvantage in that there is no economic feasibility due to high production cost.

On the other hand, technology that makes environmentally friendly building interior materials by mixing fibers such as chaff and rice straw with thermosetting resin without using waste paper is proposed like Patent Publication No. 1994-24005, Patent Registration 10-643338, Patent Registration 10-708612, etc. In view of the fact that these prior arts can be returned to the natural state using chaff, which is a natural material, it is proposed in the name of eco-friendly, but it is not only eco-friendly, It does not solve the problem that no toxic gas is generated, and the building interior according to the present invention also has a problem that the price is expensive.

Accordingly, the present invention solves various problems according to the existing building interior materials as described above, the material can be easily obtained, flame retardant, no harmful gas is generated, can be recycled, and most of all can be made at a low price to consumers It is an object to provide a building interior material and a method of manufacturing the same that can be provided at a low cost.

Another building interior material in accordance with the present invention for achieving the above object is made by mixing the urea resin molding material, lime powder and inorganic pigments and then heat molding using a molding machine.

When the compositions are mixed with each other and put in a heated mold to compression molding, the mixed composition is melted in the heated mold to mold the building interior material according to the present invention.

Building interior materials of the present invention made by mixing the composition as described above is a flame-retardant material that the whole composition is not burned well, so the moldings made by mixing and melting them also have flame retardancy, not only does not generate harmful gases to the human body, When the molded product is discarded, it can be shredded and reused, and the waste can be collected and recycled again. Since the raw material of the composition is cheap, the product can be produced at low cost by producing and supplying the building interior material according to the present invention. Can achieve the effect.

In addition, the building interior material made in accordance with the present invention can not only improve the flame retardancy, but also increase the mechanical properties, and can be obtained by simply forming the desired finished product.

Hereinafter, a building interior material and a manufacturing method thereof according to a preferred embodiment of the present invention will be described.

The building interior material according to the present invention is made by mixing 48.8-54.3 parts by weight of urea resin mixture powder, 45-55 parts by weight of horse powder and 0.7-1.2 parts by weight of inorganic pigment.

In general, limestone is obtained by burning limestone to remove carbon dioxide, and limestone is obtained by pouring water into quicklime lime, commonly referred to as lime. It is obtained by thermal decomposition of natural limestone or calcium carbonate to about 900 degrees or more.

Such lime is used not only as a raw material for bleaching powder, carbide, cement, glass, etc., but also for various purposes such as lime fertilizer, soil stabilizer, disinfectant and desiccant.

In addition, since lime has a high melting point (900 ° C. or higher), it is used for the interior of a blast furnace as an industrial use. In the present invention, the composition of the composition constituting the building interior material using the property of high melting point of lime is thus used. In order to use as an element, it is preferable to use calcined lime treated with quicklime for safety as a building interior material. In the present invention, a powdered one is used to facilitate molding.

On the other hand, urea resin is a synthetic resin made by the condensation reaction between urea and formalin. It is not burned, resistant to acidity, light and impervious to physical properties, and is usually used as a material, paint or adhesive for household appliances.

In the present invention, the gypsum powder is bonded to each other by using the basic physical properties of the urea resin, and a molded article of a certain form can be obtained using the flame retardancy and the moldability of the urea resin itself.

The urea resin mixture used in the present invention is a mixture in which urea-formaldehyde resin is filled with alpha-cellulose (α-Cellulose) and used in powder or particulate form. Using a molding machine (compression molding or injection molding) is applied to heat and pressure in the mold to complete the molded product, the shrinkage of the molded product is 1.8% ~ 1.2%.

The components of the urea resin mixture used in the present invention are shown in the table below.

ingredient W% CAS NO. Urea resin 62-67 68071-45-4 Pulp or cellulose 30-35 65996-61-4 Stearic acid 0.5 61790-38-3 Formaldehyde 0.1 or less 50-00-0

However, in Table 1, it is condition that the sum total of all the components which comprise a urea resin mixture becomes 100W%.
In addition, as general molding conditions of the urea resin mixture used in the present invention, the mold temperature is 158 ~ 165 ℃, the molding pressure is 100kg / ㎠, the curing time is 1.5mm / 30 ~ 45sec, 3.0mm / 60 ~ 70sec, 5.0mm / 110 ~ 140sec.

However, by molding the urea resin mixed with gypsum powder as in the present invention, while maintaining the mold temperature and the molding pressure almost the same, it is possible to reduce the curing time according to the thickness.

As a result of the experiment was mixed by the mixing ratio of the composition according to the invention in the case of 3.0mm was able to reduce the time to 40 to 50 seconds.

On the other hand, the inorganic pigment which is one of the compositions used for making the building interior material of this invention is also called mineral pigment. These inorganic pigments are made of natural minerals as they are, processed or pulverized natural minerals, and made from metal compounds such as zinc, titanium, lead, iron, copper, and chromium as raw materials.

These inorganic pigments are generally opaque and insufficient in concentration compared to organic pigments, but have good light resistance and heat resistance and are insoluble in organic solvents. In addition, the price is low and the usage is high.

On the other hand, there are various kinds of inorganic pigments, and if they are divided into colors, white pigments (zinc oxide, titanium oxide, silver white, etc.), red pigments (Benggala, vermilion, cadmium red, etc.), yellow pigments (chrome yellow, ocher? Cadmium yellow, etc.), green pigments (emerald rust, chromium oxide rust, etc.), blue pigments (Prussian blue, cobalt blue, etc.), purple pigments (manganese, mars, etc.), black pigments (carbon black, iron black, etc.) And transparent white pigments (also called extender pigments) such as silica white, alumina white, white clay and calcium carbonate. Paints, printing inks, crayons for painting, rubber, communication machines, building materials, ceramic products, synthetic resins, etc. are widely used.

And inorganic pigments consisting of oxides, sulfides, chromates, and ferrocyanides such as zinc, titanium, iron, copper, chromium, and earthen pigments such as natural red soil and ocher, and metals. And metal powder pigments using powders.

In the present invention, the reason why the inorganic pigment is used is to express the color of the building interior materials required. The resin resin mixture is colorless and the gypsum powder is generally gray. Since there is no general, in the process of making a variety of building interior materials to go through a separate process, such as coating a variety of films on the molded article or color, in the present invention to obtain the desired color immediately through the manufacturing molding step.

Therefore, the type of inorganic pigment to be used varies depending on the color to be obtained, and since the physical properties of general inorganic pigments are not very different from those of gypsum because they are natural minerals, it will be a big problem even if they are selected according to color in the present invention. none.

The building interior material of the present invention made of the composition as described above is first mixed with an inorganic pigment to the urea resin mixture and evenly mixed, and then mixed with the urea resin mixture and lime powder in a predetermined ratio.

The mixed composition is poured into a mold heated to 160 to 170 ° C. and press-molded at a pressure of 300 tons for about 1 minute using a heat press to obtain a molded product having a desired bar shape.

Since the molded article thus obtained is prepared by adding a pigment representing a desired color in advance, a finished product is obtained without the need for additionally applying a color to the molded article.

In particular, since the surface is made smoothly, the finished product is made by removing the mold from the mold after molding without the need for additional film or decoration.

As a result of comparing and analyzing the physical mechanical properties according to the component ratio of the building interior materials of the present invention as follows.

According to the mixing ratio of the components Example  Delimiter

division Lime powder (parts by weight) Urea resin (parts by weight) Inorganic Pigments (parts by weight) Example 1 41.4 58 0.6 Example 2 46 53.3 0.7 Example 3 50 49 One Example 4 52 47 One Example 5 55 43.8 1.2

remind Example  Classification table showing difference in physical properties

division Shrinkage (%) Absorption rate (%) Heat deformation temperature (캜) Impact strength
(Kgf.cm/cm 2) Flexural strength
(Kgf / mm2) The tensile strength
(Kgf / mm2) Surface condition Example 1 0.6 0.5 550 4.5 10 7 Smooth Example 2 0.4 0.3 600 6 10 8 Smooth Example 3 0.4 0.3 630 6.2 11 8 Smooth Example 4 0.3 0.2 650 6.5 11 9 Smooth Example 5 0.3 0.2 680 7 12 10 Slightly rough

In addition, the physical properties of the urea resin mixture used in the present invention, the physical specific gravity-1.4 ~ 1.5 JIS.K-6911, shrinkage is 0.6 ~ 0.8%, absorption rate 0.4 ~ 0.8%, heat deformation temperature: 110 ℃ When molded by mixing with the gypsum powder as in the present invention, the shrinkage can be lowered to 0,4% or less, and the water absorption can also be lowered to 0,3% or less. And above all, the heat deflection temperature could be increased to 600 ° C or higher.

On the other hand, the mechanical properties of the urea resin mixture used in the present invention is mechanical impact strength: 2.5 ~ 3.5㎏ f.cm / ㎠, flexural strength: 10 以上 ㎏f / ㎠, tensile strength: 6 ~ 8 kgf / ㎠, When the gypsum urea resin mixture is mixed with the gypsum powder as in the present invention, the mechanical impact strength: 6 to 7 kgf.cm/cm 2, the bending strength: 12 to ㎏f / ㎠, the tensile strength: 8 to 10 kgf In particular, the mechanical impact strength can be greatly improved, and it can be concluded that it is suitable for molding and using building interior materials.

If the lime powder is used in an amount of 45 parts by weight or less, and the urea resin mixture is mixed further, the specific gravity of lime in the mixing ratio of the whole composition may be too low to affect the combustion point, and the specific gravity of the urea resin, which is another mixture, Too large, it becomes difficult to obtain the properties such as strength and surface treatment necessary for the building interior materials, in particular it becomes difficult to obtain the mechanical and physical properties as described above.

In addition, when 55 parts by weight or more of lime powder is used, it is difficult to maintain the lime powder in a constant form because it has a large amount of input compared to other mixtures of urea resin, and it is difficult to obtain the required physical properties as described above as building interior materials. There is a problem.

As described above, when the lime powder and the inorganic pigment are mixed with the urea resin mixture according to the present invention and heated and press-molded using a mold and a press, the mechanical properties are much higher than those made by the urine resin powder itself or the gypsum powder alone. Not only is it excellent, it is possible to increase the temperature burned by fire, and it is easy to mold, so that the required finished product can be easily obtained.

Claims (2)

48.8 to 54.3 parts by weight of urea resin mixture, consisting of 62 to 67 W% of urea resin, 30 to 35 W% of pulp or cellulose, 0.5 W% of stearic acid, and 0.1 W% of formaldehyde. To be 100W%), 45-55 parts by weight of lime powder, and 0.7-1.2 parts by weight of inorganic pigment.
48.8 to 54.3 parts by weight of urea resin mixture, consisting of 62 to 67 W% of urea resin, 30 to 35 W% of pulp or cellulose, 0.5 W% of stearic acid, and 0.1 W% of formaldehyde. 100W%), 0.7-1.2 parts by weight of inorganic pigment and 45-55 parts by weight of lime powder are mixed, and the mixed mixture is put into a mold heated to 160-170 ° C., using 300 tons of heat press. A method of manufacturing building interior materials that is press molded for 1 minute under pressure.