KR0159041B1 - Sound absorption anti-vibration foaming board containing pulp sludge and polymeric resin as a binder and the manufacturing method thereof - Google Patents

Abstract

The present invention relates to a foamed sound-absorbing and dustproof plate using a polymer resin binder and pulp sludge. The present invention relates to a pulp sludge produced as industrial waste in a papermaking process, using polymer resin as a binder, and having a uniform thickness. Open micro-cells (Opened micro cell) is characterized in that the irregularly distributed evenly formed, the sound-absorbing plate, dustproof plate of the present invention is a pulp sludge, unsaturated ester resin, epoxy resin, cellulose resin, acrylic resin or A polymeric resin selected from their mixtures, a blowing agent selected from animal proteins, amino sulfates, alcohol ethers, aluminum powders and zinc powders or mixtures thereof evenly diluted in a mixture of this pulp sludge with the polymer resin, It consists of open microbubbles of the size of 100㎛ Characterized in that the foamed ceramic sound-absorbing and vibration-proof plate made by dispersing the open micro-bubbles produced by the present invention exhibits a particularly effective sound absorption and vibration damping effect for low sound and low vibration.

Description

Foam type sound absorbing and dustproof plate using polymer resin binder and pulp sludge, and method for manufacturing same

The present invention relates to a foamed sound-absorbing and dustproof plate using a polymer resin binder and pulp sludge, and a method of manufacturing the same. More specifically, the present invention relates to a polymer resin instead of cement as an inorganic binder in pulp sludge produced as a by-product from a paper manufacturing process. The present invention relates to a porous pulp sludge sound-absorbing and dustproof plate in which microbubbles are formed in an open form by mixing them as a binder and foaming and curing the same, and a method of manufacturing the same.

Generally, pulp sludge is a waste produced after industrial pulp is manufactured by mixing inorganic talc in the pulp manufacturing process. If the pulp content is less than 50% of the pulp waste, it cannot be used for incineration and renewable energy and is disposed of as industrial waste. Because it is inevitable, they are piled up just like waste soil for pollution, causing much damage to the surrounding soil. However, since this industrial waste is light and bulky, soft ground is formed, and the bulk volume is large, so that a long time is required until the pulp is rotted. Therefore, at the time of recycling industrial wastes generated in the paper manufacturing process, research was started to utilize pulp sludge as the building material.

As a result of observing pulp sludge at the Jeonju plant and Janghang plant of Hansol Paper Co., Ltd., organic and inorganic contents of the pulp sludge could be compared as follows. Organic and inorganic content comparison results are shown in Table 1.

If the organic matter content of the pulp waste is more than 90%, self-combustion is possible. If the organic matter content is 50-90%, it can be combusted when the auxiliary fuel (diesel) is tushed. In addition, if the organic content is less than 50%, it is impossible to burn it as it is, and it must be disposed of as it is, and also because its own volume is large, the waste volume is large and the situation is serious for soil pollution.

As shown in Table 1, since the organic matter content of pulp sludge, which is an industrial waste from Jeonju and Janghang, is less than 50%, incineration is not possible, so its utilization method should be actively reviewed.

Pulp sludge, which is a waste in the paper production process or the paper recycling process, can be recycled as a useful resource with the greatest interest in establishing the most effective treatment plan while minimizing the industrial waste pollution as much as possible. I'm working on a solution. In particular, research on the manufacture of building materials for the purpose of recycling the paper waste is the most active situation.

In addition, in the past, the demand for maintaining a comfortable living environment and personal privacy is increasing rapidly due to lack of awareness and indifference to noise, and the demand for sound absorbing and vibration damping plates is greatly increased, and the sound absorbing effect is also desired. .

The present inventors have considered that the pulp sludge sound absorbing and dustproof plate is based on the characteristics of the fine fiber, that is, the fibrillation is well considered in consideration of the fact that the main component in the sludge is the fibrillation element, which is the fine fiber. Was prepared.

Generally, a sound absorbing plate for absorbing sound waves delivered to the air and making reflections refers to a material that absorbs sound waves by converting sound vibration energy into heat energy. The sound absorbing plate includes a fibrous sound absorbing material, a porous type sound absorbing material, and the like. The principle of the porous sound absorbing material is to use the principle of suppressing the reflected sound by vibrating the membrane of the internal air or absorbing the energy of the sound by friction as sound waves are repeatedly incident and reflected in the many fine holes inside the sound absorbing plate.

Sound absorption performance depends on fibrillation degree of fiber in fibrous sound absorbing material. Density (ρ) of sound absorbing plate material blocks sound wave length, and bubble size of pores acts as negative sound absorbing and reflecting sound with dominant wave length disturbance effect. Is a variable.

The sound absorption effect is expressed in decibels (dB), which is the sound absorption rate. The sound absorption rate is changed by the size of the minute hole inside the sound absorption plate, the vibration and the density of the fibrils according to the degree of fibrillation. In other words, the larger the size of the fine holes (hereinafter referred to as bubbles), the more effective the sound absorption of the high vibration and high frequency ranges, and the smaller the size of the holes, the more effective the sound absorption of the low vibration and low frequency ranges. In addition, the well-fibrillated matrix reduces the sonic energy as the fibril vibrates, and as the thickness of the material, the density, and the fibrous fibrillation in the matrix increases, the density of the backing plate and the characteristics of the material used. It can be seen that Humup performance and sound insulation performance are improved.

In addition, the structure of the sound-absorbing and dustproof plate itself is simple and easy to manufacture, and as one of the building materials, a material that is not easily destroyed at the construction site and easy to construct is required.

The present invention has been made to satisfy the requirements of the various sound absorbing and building materials, the object of the present invention is to use a polymer resin as a binder instead of cement as an inorganic binder while containing pulp sludge, chemical resistance, toughness, The present invention provides a foamed sound absorbing and dustproof plate mainly composed of pulp sludge with high flexural strength and tensile strength, simple structure, and easy construction, and a method of manufacturing the same.

Accordingly, an object of the present invention is to provide a foamed sound absorbing and dustproof plate containing a pulp sludge as a main component, which is simple in structure, excellent in sound absorption effect, and easy to construct by recycling pulp sludge which is industrial waste.

Another object of the present invention is to recycle pulp sludge, which is industrial waste generated during the paper manufacturing process or paper recycling process, to reduce the amount of industrial waste, thereby preventing pollution of industrial waste and contributing to preserving the environment. It is to provide a foamed sound-absorbing and dustproof plate and a manufacturing method thereof.

Another object of the present invention is foamed sound absorption mainly composed of pulp sludge which can reduce the dimension of the cross section as a durable and high toughness material, which is strong and can reduce the material cost and transportation installation cost by reducing the weight. To provide a dustproof plate and a method of manufacturing the same.

Foamed sound-absorbing and dustproof plate using the polymer resin binder and pulp sludge according to the present invention is a well-fibrillated pulp sludge, a polymer resin as a binder, and a blowing agent evenly diluted in a mixture of the pulp sludge and the polymer resin. In addition, the blowing agent is characterized in that it consists of open micro-bubbles formed in the mixture evenly mixed foamed.

In addition, the method for producing a foamed sound absorbing and dustproof plate using the polymer resin binder and the pulp sludge according to the present invention is well developed by resurfacing the pulp sludge as a pulp sponge device, and thus the fibrillation is well developed. A slurry is prepared by mixing 5-15 kg of the polymer resin with 85 to 95 kg of pulp sludge, while adding 5 to 15 atm of compressed air to evenly distribute the foam dispersion of the blowing agent diluted with 2 to 4% solution. The mixture is mixed with the slurry, vigorously stirred and mixed at high speed, and then cured to a predetermined thickness by a molding machine under a temperature of 25 ± 3 ° C. and a humidity of 50 to 60%.

In addition, the present invention has a strong durability of the sound absorbing plate itself, so it is not necessary to use a support panel, the structure is simple and easy to manufacture, and as one of the building materials has good durability and high toughness, it is possible to reduce the dimensions of the product cross-section In addition, since the construction site is not destroyed well, it is possible to reduce the waste of materials and to reduce the material cost and transportation installation cost by reducing the weight, and also facilitate the construction.

In the above description, the amount of the polymer resin added is preferably 5 to 15% by weight, particularly preferably 9 to 14% by weight based on 85 to 95% by weight of the pulp sludge. When the content of the polymer resin is 5% or less, the amount of the polymer is too small to sufficiently function as the binder, and the bonding strength with the inorganic powder is poor, causing many problems in physical and mechanical properties. In addition, if the content of the polymer resin is 15% or more, the physical properties of the pulp is reduced, the price of the product is also increased.

As the blowing agent, both organic and inorganic blowing agents may be used, and one of animal protein, aluminum powder, and zinc powder may be selected and used, and any of blowing agents generally used may be used.

In general, the open microbubble size of the foamed solid layer of the sound absorbing plate is determined by the amount of the blowing agent. In the present invention, the amount of blowing agent is mixed with 0.01-0.05% of the amount of the sludge, so that the amount of bubbles per 1 m 3 of the product volume is 0.1. It is preferable to make it to 0.3 liter (Liter). The microbubble size of the foamed solid layer thus prepared was a standard distribution in the range of about 5㎛ to 100㎛ diameter.

In the above method, compressed air is used to evenly distribute the bubble dispersion. The pressure is most preferably about 5 to 15 atmospheres. If the pressure of the compressed air is high, the micro cell size is large and the pressure of the compressed air is high. At this low pressure, the micro cell size becomes smaller, and the particle spacing becomes dense, but when the pressure is too low, the micro bubble size becomes too fine, so it blocks high frequencies, i.e., high frequencies, but does not absorb and damp low and low vibrations. Therefore, there is no stability as a sound absorbing and dustproof plate, and it is only a sludge composite plate material, so that the sound absorbing and dustproofing effect is deteriorated.

In order to facilitate dispersion of the foamed micro-bubbles, it is necessary to add the blowing agent to the mixture of pulp sludge and polymer resin and stir it at high speed or mix with an Ohmni mixer.

Since the sound-absorbing / dustproof plate contains a large amount of fine fibers therein, when a matrix well fibrillated by the components of the fine fibers is produced, the fibrils of the matrix vibrate to lower sound wave energy. .

The foamed pulp sludge sound absorbing and dustproof plate mainly composed of the polymer resin produced according to the present invention has a bubble size of about 5 to 160 µm and is composed of open microbubbles, so that the sound absorbing and dustproofing effect is particularly effective for low and low vibration. It is found to be particularly suitable as a sound absorbing and dustproof plate for the purpose of sound absorbing and dustproofing for low sound and low vibration, and is also suitable as a soundproofing material for ordinary living environment, music room and other soundproofing space.

Although the total thickness of the foamed pulp sludge sound absorbing and dustproof plate containing the pulp sludge of the present invention as a main component can be produced at about 5 cm, 7.5 cm, 10, 0 cm, 12.5 cm, and 15.0 cm, 5 to 10 cm is most preferred.

In addition, the foamed sound-absorbing and dustproof plate using the polymer resin binder and the pulp sludge prepared according to the present invention is a fine fiber having a well-fibrillated form of pulp sludge, which is a main component thereof, and thus acoustic wave energy due to vibration caused by fibrils. The sound-absorbing / dustproof plate made of a solid layer containing the same has a high impact resistance because polymer resin is mixed and elastic, and is excellent in deterioration or damage, and thus has excellent durability. In addition, the foamed sound-absorbing and dustproof plate using the polymer resin binder and pulp sludge produced according to the present invention can be freely colored at the time of manufacture, so that it can be used as a finishing material in construction. . In addition, nailing, screwing is not only easy, but can be easily cut with a saw, etc. can make the construction work very easy.

In addition, since it is a building material that does not use cement at all by using a polymer resin as an organic binder, it has excellent elasticity and has high bending strength, high tensile strength and high toughness, which are characteristics of the polymer resin, and excellent chemical resistance, Wear resistant, waterproof, insulating and contact resistant.

As the polymer resin, unsaturated ester resins and epoxy resins are most widely used. In addition, cellulose resins and acrylic resins can be used, and almost all synthetic resins can be used as a kind or a mixture thereof.

The sound absorbing plate of the present invention is foamed by using a method of mixing the blowing agent solution in a solvent by injecting air into the diluted solution to foam the foam conditions are good, foam stability is excellent, and the bubbles are uniformly dispersed in a uniform size do.

According to the foamed sound-absorbing and dustproof plate using the polymer resin produced by the present invention as a binder and containing pulp sludge as a main component, the supporting plate is not necessary, and its structure is simple. As the pulp sludge component is a fiber component, In addition to its function, it also has insulation, heat resistance, hygroscopicity and fire resistance as a building material. Polymer resin is used as a bonding material, so it is not only durable but also has high toughness. Through this, material cost and transportation installation cost can be reduced.

In addition to the pulp sludge used in the present invention, paper such as general newspapers and corrugated paper can be re-sponged with a pulp sponge machine, and then mixed with an organic binder to prepare a slurry, foamed and cured to produce a sound-absorbing and dustproof plate. .

It is also possible to prepare and use high-quality pulp sludge, which refers to the mixing of pulp and talc and mica. The high-quality pulp sludge prepared as described above is lightweight and provides an effect on sound absorption, soundproofing and discharging, so that the sound-absorbing and dustproof plate may be manufactured using high-quality pulp sludge.

As described above, according to the present invention, a foamed sound absorbing and dustproof plate mainly comprising pulp sludge and a method for manufacturing the same are manufactured by recycling pulp sludge, which is an industrial waste produced in a papermaking process or a paper recycling process, to produce a sound absorbing and dustproofing plate. Therefore, as well as preventing industrial pollution of industrial wastes, the mixture of pulp sludge using polymer resin as a binder is foamed with a compressed air of about 5 to 15 atm, and then cured. It is simple, easy to carry, easy to install, and has excellent sound absorption and dustproof effect.

The foamed sound absorbing and dustproof plate mainly composed of pulp sludge produced by the present invention is excellent in sound absorption performance by reducing fibrillation of sound wave energy by using fibrillated pulp sludge, and the bubble size of the sound absorbing plate. Has been found to have a particularly effective sound absorbing effect for low and low vibrations, and is particularly suitable as a sound absorbing and dustproof plate for the purpose of sound absorption and sound insulation of low and low vibrations, and is also suitable for residential environments, music rooms and other soundproofings. It is also suitable for walls, floors and finishing and decorative materials in such required spaces.

Claims (7)

A pulp sludge, a polymer resin as a binder, a foaming agent diluted evenly in a mixture of the pulp sludge and a polymer resin, and an open microbubble formed in a mixture in which the blowing agent is mixed and foamed evenly. Foam type sound absorption and dustproof plate using sludge. The method according to claim 1, wherein the micro-bubbles are 0.1 to 0.3 liters (Liter) per 1 ㎥ of product volume, the bubble size is a foamed sound-absorbing and using a polymer resin binder and pulp sludge, characterized in that 5㎛-100㎛ Dustproof plate. [Claim 2] The foamed sound absorbing and dustproof plate according to claim 1, wherein the polymer resin is one selected from unsaturated ester resins, epoxy resins, cellulose resins, and acrylic resins or mixtures thereof. . The foamed sound absorbing and dustproof plate according to claim 1, wherein the amount of the polymer resin is about 5 to 15% by weight of the total amount of the product. Pulp sludge is pulp sludge again with a pulp sponge machine, and the pulp sludge is mixed with 85 to 95% by weight of polymer resin 5 to 15% by weight, and the foaming agent diluted with 2 to 4% solution is bubble-dispersed. In order to distribute evenly, pressurized air of about 5 to 15 atm is mixed with the slurry, mixed with vigorous stirring at high speed, and then hardened to a constant thickness by a molding machine under 25 ± 3 ° C. and 50 to 60% humidity. A method for producing a foamed sound absorbing and dustproof plate using a polymer resin binder and pulp sludge. 6. The foamed sound absorbing and dustproof plate using a polymer resin binder and pulp sludge according to claim 5, wherein the blowing agent is one or a mixture thereof selected from animal proteins, amino sulfates, alcohol ethers, aluminum powders and zinc powders. Manufacturing method. The method of claim 5, wherein the polymer resin is an unsaturated ester resin, an epoxy resin, a cellulose resin, an acrylic resin, or a mixture thereof.