KR0178461B1 - Method for manufacturing interior decoration board for architecture - Google Patents

Abstract

The present invention recycles waste materials that are discarded, compared to conventional composite timbers, timber boards, and synthetic resins, which are made of synthetic resins, and are light in weight, strong in strength, excellent in thermal stability and thermal formation, and also contribute to reducing environmental pollution. A method of manufacturing a high-rise building material, which includes an initial support fee consisting of waste pulp 30-55%, waste polyester fiber 20-35% and waste polypropylene fiber 20-35%, with 2-9% treatment and water. After homogenizing to prepare the super-support solution, it is dehydrated while being transferred to a mesh belt to form a plate-like body, passed through the interlocking roller to compress and dewater, and then sprayed with a wet reinforcement resin solution on the pressed and dewatered cardboard surface. After drying at the temperature of ℃ to make water content of 5-20%, cut the dried cardboard into a specific shape and wet the surface of the cut cardboard to 180 ~ 200 ℃ In the figure it consists of a process of press-molding at a pressure of 120-150kgf / ㎠.

Description

Manufacturing method of building interior board

The present invention relates to a method for manufacturing a building interior plate material, more specifically, by recycling the waste resources discarded, compared to the conventional building materials made of synthetic wood, solid wood, and synthetic resin, lightweight, yet strong in strength and thermal stability and Not only is it excellent in thermoformability, but also contributes to the reduction of environmental pollution.

As a conventional building interior material, wall or ceiling panels are mainly made of high-grade building materials decorated with veneer or synthetic wood with veneer or painting. They are lightweight and highly applicable building interior materials, but they are weak in heat resistance and economical. There is a disadvantage that vibration is easily generated and easily damaged by external shock. In addition, the use of natural wood is excellent in terms of quality, but Korea is not rich in natural wood resources, there is a concern that it may adversely affect the national economy. In addition, gypsum board has excellent flame retardancy as a building material, but it is easy to be damaged by heavy and small impact, and there is a risk that it may be a carcinogenic component including asbestos. On the other hand, internal materials such as cement, glass fiber, vermiculite, cured curing with organic reinforcement materials, or curing materials with binders such as adhesives have been developed. In general, they have excellent heat resistance and good physical properties such as bearing capacity and surface strength, but they are not economical because they do not meet the recent trend of lightweight construction materials and require a lot of manufacturing cost. In addition, built-in boards for building were manufactured using synthetic resin as a main raw material. However, these boards have very high thermal expansion coefficients, which not only cause torsional phenomenon after construction, but also have a high degree of expansion, forming gaps in the joints and deformation of heat. Had a problem.

Therefore, the present inventors made a method for manufacturing interior materials of building materials using waste fiber and waste pulp of polyester and polypropylene that are discarded in a rag or plant instead of expensive imported wood and synthetic wood and gypsum board, which are weak against external impact, and synthetic resin having low heat resistance. As a result of research and development, it is a manufacturing method of building interior plate which is light weight, has low thermal deformation, excellent thermal formability, and has excellent strength and sound insulation effect against external impact, and maximizes the recycling of resources without fear of environmental pollution. It was found that the preparation method of.

On the other hand, with the recent increase in environmental concern and the study of efficient methods for recycling and disposal of resources, we have presided over the waste resources that have been disposed of in nature as it is, causing enormous economic damage and serious environmental problems. The number of patent applications has also increased. As a representative example, in Korean Patent Application No. 92-13401 (filed July 27, 1992, a method of manufacturing synthetic wood using waste resources), the production of synthetic wood with better tensile strength than general wood In providing the method, 45 g of rice straw (or barley straw) ground to 3.5 cm in length, 33 g of waste paper (or paper waste) to 0.1-0.5 cm in length, 22 g of sawdust (or waste wood) to 70-80 mesh 10 g of urea resin adhesive was mixed with 100 g of the mixed mixture, and the mixture was left to stand in the air for 20-30 minutes, and then pressed under a pressure of 150-200 kg / cm to a heat of 150-200 ° C. It has been disclosed a method for producing synthetic wood using waste resources characterized by the fact.

However, although the manufacturing method has the advantage of increasing the utilization of resources by using waste resources, economical and contribute to the prevention of environmental pollution, on the other hand, the manufacturing method is simply crushed rice straw and sawdust and bonded with urea resin adhesive After only the compression molding process, the synthetic wood produced by the manufacturing method is not very dense, and the straw and sawdust used as the raw material is not excellent in terms of thermoplastic and thermoforming, smooth surface Due to the difficulty of forming the surface, there was a problem in that it is not possible to achieve various decorative effects and various applications such as forming various irregularities.

Therefore, the inventors of the present invention are simpler and more economical as a method of manufacturing interior building boards, and the interior boards produced by such a manufacturing method can be applied in various ways due to their excellent thermoformability. As a result of the research on the manufacturing method of building interior plate, which is superior in quality to the existing building interior plate, it can also benefit from recycling of resources and prevention of environmental pollution by utilizing industrial waste materials. 7.14 Patent Application No. 95-20835 (Manufacturing method for building interior plate) to solve the problems of conventional interior plate, with 50% waste pulp, 20% polyester fiber and 30% polypropylene fiber. The prepared super support fee is added to the aqueous solution with 20-30g / l treatment concentration and homogenized raw material solution Spread it evenly to form a plate and pass it through the rollers that engage it to squeeze the water first, and then dry it at a temperature below the melting point of polypropylene so that the water content is 20% or less, and pass it while immersing it in a wet builder solution. It has been disclosed a method for manufacturing a building interior plate material comprising secondary pressing with an interlocking roller to pass a drying drum maintained at a temperature of 180 ° C-200 ° C.

The plate material according to the above manufacturing method does not have a big problem even if it is left as it is for a long time when the plate itself is used as a final product, in order to apply this to prepare a secondary molded product having various uneven patterns, the thermosetting resin is cured In order to prevent the formability of the plate from falling, it must be cut quickly after drying or compression molded after cutting.

Although the above manufacturing method is a method capable of solving the conventional problems and providing a building material having excellent strength and thermoforming, the present inventors have completed the present invention as a result of repeated studies.

It is an object of the present invention to provide a method for manufacturing a building interior plate material that can maximize the utilization of resources and prevent environmental pollution by utilizing the waste resources discarded.

Still another object of the present invention is to provide a method for manufacturing a building interior plate using waste fibers, which is much more economical and easier to use than the raw materials of a conventional building interior plate.

Still another object of the present invention is to provide a method for manufacturing a building interior plate material which can maximize product usability and decorative effect by expressing various irregularities in commercialization due to excellent thermal stability and thermoforming.

Still another object of the present invention is to provide a method of manufacturing a building interior plate having excellent strength against external impact, and particularly having a soundproofing effect against noise.

Referring to the manufacturing method of the present invention in detail as follows.

The manufacturing method of the present invention homogenizes the super-support fee consisting of 30-55% waste pulp, 20-35% waste polyester fiber and 20-35% waste polypropylene fiber with 2-9% treatment and water, After manufacturing, it is dehydrated while being transferred to a long belt to form a plate-like body. The plated body is passed through the interlocking roller to be pressed and dehydrated. Then, the wet reinforcement resin solution is sprayed onto the pressed and dewatered cardboard surface and dried at a temperature of 60 to 90 ° C. After the moisture content is 5 ~ 20%, the dried cardboard is cut into a specific shape, wetted with water on the cut cardboard surface, and press-molded at a pressure of 120 ~ 150㎏f / ㎠ at a temperature of 180-200 ℃. The process takes place.

Waste pulp used in the present invention is obtained by swelling cotton yam and swelling with caustic soda solution or various waste pulp recovered from papermaking waste solution after papermaking, cotton pulp, flax pulp, hemp pulp, wood pulp, cinnamon. Other pulp other than pulp, jute pulp and manila pulp may be used. Cotton pulp is preferred because of its toughness, durability, and sound insulation. In practice, it is easy to use pulp recovered from papermaking waste after papermaking.

In addition, the waste polyester fibers and waste polypropylene fibers of the present invention are also discarded at a ragman plant, and do not require elaborate processing as in general papermaking, but should be swelled and cut to a certain length so that they can be made paper at least, so that a homogeneous cardboard can be obtained. In the case of using polyester and cotton blended hemp or scrap, the composition ratio of pulp may be reduced according to the composition ratio of each component. In other words, when the blending ratio of cotton is high, the ratio of waste pulp may be adjusted to be low.

When cutting the waste pulp and waste fiber to a certain size, the thickness and strength of the resulting interior plate material should be considered. In other words, if the length of the pulverized waste fiber and waste pulp is too short, the strength of the interior plate becomes too weak. On the contrary, if the length of the waste fiber and waste pulp is too long, more energy is required during molding or pressing due to the space between the fibers. You will not.

In the present invention, when the thickness of the plate is 2-4mm, it is preferable to cut the length of the waste fiber or waste pulp into 2-5mm, and when the thickness of the plate is 4-8mm, the length of 3-8mm is preferable. Do.

Fillers used in the present invention may be selected from one or more of white clay, ocher, talc, asbestos, gypsum, calcium carbonate, diatomaceous earth, depending on the end use of the interior materials such as wall, ceiling, decorative plates, such treatment Is added to prevent the homogeneous distribution of the waste fibers and pulp used as the subsidiary materials so that they are not homogenized due to the specific gravity difference, so that the separation phenomenon does not occur with each other. Combined to help homogenize supersupport fluids. In addition, the medical treatment densifies the board's tissue and improves heat resistance.

And although the particle size of the treatment is slightly different depending on the type of treatment, it should be used in the size of 20μ or less in general to expect the addition purpose and satisfactory function of the treatment.

By adding and mixing 0.3-3.0% light oil before dehydrating the homogenized supersupport liquid in the present invention, when the supersupport material is homogenized with water, impurities of waste fibers or waste pulp will rise to the upper part of the supersupport solution together with the diesel fuel. In this case, it is preferable to discard the super-support liquid containing the light oil layer before performing the next process.

In the manufacturing method of the present invention, the water content after the compression dehydration with a roller is 10 to 20%. This is because dewatering to this extent, when the wet reinforcing resin solution is sprayed onto the paperboard in the next process, the paperboard may contain a large amount of the wet enhancer to increase the thermoforming of the final product.

The wet-enhanced resin solution is an aqueous solution of 3% weight ratio of cationic urea formaldehyde acidified to pH 5-8 or an aqueous solution aged 3 to 4% by dissolving 3 to 4% of the meramine resin in an aqueous solution acidified with hydrochloric acid. The resin solution may form a monohydrochloride salt and may be diluted with water, and the resin particles may be easily adsorbed onto the fiber by being charged with an electrostatic charge. Wet enhancers harden by heat to increase the surface strength and bearing capacity of the sheet and make it water resistant with polypropylene.

After the immersion process of the wet enhancer, the plate is dried at a temperature of 60 ~ 90 ℃ in the dryer, the content of water after drying to 5 to 20%. The preferred drying temperature in this drying process is below the melting point of polypropylene, and it should be dried at a temperature below the melting point of polypropylene to impregnate the moisture enhancer in a large amount. The polypropylene is melt-bonded by heat to hinder the penetration of the wet enhancer solution.

In addition, in the present invention, as in the present application No. 95-20835, after the heat curing treatment and the secondary drying treatment with the wet enhancer, the plate is not immediately cut, and the thermosetting resin solution is cured, resulting in poor formability of the plate. By cutting in a state containing a certain amount of moisture after the first drying in order to prevent that, it can have more time to perform the work process than the conventional method that must be cut immediately after drying, and the overall appearance and Finishing can be done more smoothly.

After cutting the dried lining board, the board is sprayed with water back and forth to accommodate the heat and pressure conditions applied during the subsequent press molding process. That is, when compression molding without spraying water, the surface is burned by heat, or the moisture inside the plate is ejected in the form of bubbles on the surface of the dry plate, there is a risk of discoloring the surface to prevent this.

In the compression molding process using a hydraulic press, which is the final process of the present invention, heat, pressure, and humidity conditions applied to the interior plate are important.

In the present invention, the interior plate containing moisture on the outer surface as well as the inside is put on various types of molds and compressed by a hydraulic press, the temperature is 180 ~ 200 ℃, the pressure is preferably 120 ~ 150kgf / ㎠ and about It should be compressed for 20 ~ 25 seconds to produce the desired high strength building board.

In this process, when the temperature rises to 180-200 ° C., the polypropylene melts to strongly bind the waste pulp and the waste polyester fiber, and the polyester fiber softens the surface and has adhesiveness with other compositions. Present and have strong tensile strength.

Such temperature and pressure conditions have been found by the inventors of the present invention to find the optimum experimental conditions by the experiment, it is impossible to form the desired shape or obtain the desired strength outside the above range.

In the composition ratio of the super-support material of the present invention, excessive use of pulp increases the absorbency, so that the wet strength is weak, the thermoforming property is poor, the bearing capacity and the surface strength are weak, and the pollution degree is high, while the composition ratio of the polypropylene is excessively used beyond the above range. If the heat resistance of the sheet is weakened, the deformation can easily occur according to the temperature change.On the contrary, when a small amount is used to fall short of the above range, the binding properties between the compositions are inferior, the surface is rough, and the thermoforming becomes difficult. Problems can occur, such as rupture of the plate. In addition, polyester fiber has a thermoformability with polypropylene at high temperature and greatly increases the physical properties such as tensile strength and bursting strength of the plate.

When explaining the embodiment of the present invention in more detail with reference to the accompanying drawings as follows.

Example 1

35 kg of waste cotton pulp, 30 kg of waste polyester fiber, and 30 kg of waste polypropylene fiber collected from industrial sites were quantified, cut into average lengths of 3 mm in a cutter, and transferred to a mixer, and 1 kg of light oil and 5 kg of ocher were added. Mix and homogenize with 300 kg. After removing the light oil layer from the upper part of the super-support liquid, transfer it evenly with a long mesh belt to dehydrate during transport to take the form of cardboard, and then dehydrate by passing the interlocking compression rollers so that the water content is 13%. It was. A 3% meramine resin solution was sprayed onto the dehydrated plate surface and dried at 85 ° C. to obtain a water content of 10%. The dried cardboard was cut to a size suitable for the shape of the desired building interior materials and then sprayed with moisture on both sides of the cardboard. Then, the cardboard containing moisture on the surface was placed on the mold and molded for 20 seconds by applying a pressure of 125 kgf / cm 2 at a temperature of 180 ° C. with a hydraulic press.

The thickness of the interior plate manufactured according to this embodiment was 3.5 mm, and the measurement results of strength and other experimental values are as follows.

Example 2

48 kg of waste cotton pulp, 25 kg of waste polyester fiber and 25 kg of waste polypropylene fiber collected from industrial sites were quantified, cut into average 6 mm lengths from a cutter, and transferred to a mixer, and 1 kg of light oil and 2 kg of ocher were added. It was mixed and homogenized with 300 kg of water. The super-support liquid was uniformly transferred to a long belt, and dehydrated by passing through the compression rollers engaged with each other to dehydrate, so that the water content was about 15%. A 3.5% meramine resin solution was sprayed onto the dehydrated plate surface and dried at 90 ° C. to obtain a water content of 15%. The dried cardboard was cut to a size suitable for the shape of the desired interior material and then sprayed with water back and forth so that both sides of the cardboard were wetted. At this time, the amount of water sprayed is less than in the case of Example 1, because the thickness of the plate produced in accordance with the present embodiment is thicker, the moisture content in the plate is more. Then, the cardboard containing water on the surface was placed on the mold and molded for 25 seconds by applying a pressure of 140 kgf / cm 2 at a temperature of 200 ° C. with a hydraulic press.

The thickness of the interior plate produced according to this embodiment was 4.5 mm, the strength and other experimental values are shown in Table 1.

The building interior plate produced by the present invention is very excellent in form retention and workability including tensile strength and burst strength, and can be commercialized in various ways, and also has a sound insulation effect by using cotton pulp, and above all, the manufacturing method of the present invention By using waste paper and waste fiber, it is more economical, lighter, and does not cause environmental pollution, and it has advantages such as natural decomposition even if it is incinerated for disposal after use but very little ash is left or not incinerated. The present invention is a very useful invention in Korea, which has very little natural resources, and is a very effective method in terms of remarkably reducing environmental pollution and recycling of resources throughout the world. It will be referred to as a very preferred invention.

Claims (7)

Ultra-supporting material consisting of 30-55% waste pulp, 20-35% waste polyester fiber and 20-35% waste polypropylene fiber was homogenized with 2-9% treatment and water to produce a super-support solution. Dehydration is carried out while transferring to the belt to form a plate-like body, and then passed through the interlocking roller to compress and dehydrate. After making 20%, cut the dried cardboard into a specific shape and wet the surface of the cut cardboard and press molding at a pressure of 120 ~ 150㎏f / ㎠ at a temperature of 180-200 ℃. Method of manufacturing plate. The method of claim 1, wherein the waste pulp is a waste pulp of cotton fibers. The method of claim 1, wherein the water content after the roller compression dehydration is 10 to 20%. The method of claim 1, wherein the wet-enhanced resin solution is a solution for building interior plate material characterized in that 3 to 4% of the melamine resin dissolved in an aqueous solution acidified with hydrochloric acid and aged for 3-5 hours. The method of claim 1, further comprising adding 0.3 to 3.0% of light oil and mixing the same before removing the homogenized sheath support solution to remove the light oil layer on the upper layer. The method of claim 1, wherein the super-support material is cut into 2 ~ 8 mm. The super-support material composed of 50% of waste pulp, 20% of polyester fiber and 30% of polypropylene fiber was added to an aqueous solution with a treatment concentration of 20-30g / l, and the homogenized raw material liquid was evenly sprayed on a long belt to obtain a plate. After forming and passing through the interlocking rollers, the water is first compressed and dried at a temperature below the melting point of the polypropylene to be 20% or less of the moisture content, and then immersed in the wet thickener solution and passed through the interlocking rollers. And passing the drying drum maintained at a temperature of 180 ° C-200 ° C.