JP2001276894A - Paper containing ground pulp or chemical pulp, the paper which has been chemically treated and the paper which has been resin-processed or regenerated paper thereof and method of manufacturing molding or coating material obtained by recycling sludge thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a molding or a coating material by recycling paper, regenerated paper and sludge. SOLUTION: The molding or coating material is composed of the paper, regenerated paper and sludge, a cement based inorganic binder and a water- based high molecular material of resin and/or rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[001]

BACKGROUND OF THE INVENTION The present invention relates to a method for recycling and molding or coating a large amount of sludge discharged in the stage of producing paper and recycled paper, thereby reducing the weight of the pulp containing fibrous materials, making it hard to crack, and reducing heat resistance. It can be used in various fields because it is possible to adjust the compound from highly inflammable to incombustible and to mold a strong product.

For example, in the case of a pallet for a lift, a general standard made of synthetic resin is 1100 cm × 1100 cm, but even a lightweight one exceeds 20 kg. According to the production method of the present invention, the weight is 15 kg, which is the same standard and does not largely differ in strength.

Further, when molded into a building board, nails can be used, and the application fields of lightweight bricks and the like are infinitely widened.

[004]

2. Description of the Related Art Sludge discharged at the stage of producing paper and recycled paper has heretofore been scarcely utilized and incinerated or discarded.

[005]

Recently, most of incineration has been disposed of due to the problem of toxic smoke such as dioxin. In addition, the current situation is that disposal has reached its limit due to the reduction of laws and regulations, disposal sites, and the like. Therefore, the present invention is to reuse and re-use these discarded papers and recycled papers and their sludges by recycling them and molding or commercializing them as coating materials. The conventional technology is difficult to commercialize, and even if it is made of paper, it has many problems such as low strength and hard to use, as it is paper, and it is flammable and safety cannot be ensured. It depends on the situation.

[006]

Means for Solving the Problems To solve the above problems, the present invention takes the following technical means.

The invention described in claim 1 of the present application uses a fibrous material contained in pulp and a cement-based inorganic bonding agent and an aqueous polymer material of resin and / or rubber to obtain a fiber-containing strength. Highly viscous, lightweight, heat resistant or non-combustible moldings and coatings can be produced.

The paper, the recycled paper, and the sludge retain fiber. The above-mentioned features can be adjusted by mixing the cement-based inorganic bonding agent with an aqueous polymer material of resin and / or rubber at a ratio of 10 to 80% by weight. For example, paper and recycled paper, and those containing a large amount of sludge, are lightweight, have high viscosity and high bending strength, but have low heat resistance and noncombustibility. By utilizing these properties, adjustment can be made depending on the application.

[0109] The cement-based inorganic bonding agent can be used in an amount of 10 to 80% by weight, although it slightly varies depending on the above-mentioned performance. hardness,
The preferred amount for ensuring strength, viscosity, noncombustibility, and weight reduction is
It can be adjusted depending on the application at 30 to 70% by weight.

[0102] Further, by containing an aqueous polymer material of resin and / or rubber, the particles of the cement-based bonding agent react with water to form a cement hydrate, and the aqueous polymer component is dehydrated. Dried to form a self-adhesive and adhesive polymer film, which firmly bonds the cement hydrate with paper and recycled paper and its sludge.

[0111] In this case, the greater the amount of the resin and / or rubber aqueous polymer, the more difficult it is to ensure nonflammability, and the greater the amount of the cement-based bonding agent, the higher the nonflammability performance. The amount of the polymer material of the resin and / or rubber can be used in an amount of 1 to 60% by weight.
~ 20% by weight.

[0121] The thus molded or coated material has a function that the paper and the recycled paper and the sludge thereof function as a relaxation material to prevent cracking, and also contains a compound of an aqueous polymer of resin and / or rubber. It has been confirmed that by adjusting the ratio, it is possible to adjust even the heat resistance and the nonflammability by adjusting the waterproofing function and the compounding ratio of the cement-based inorganic bonding agent.

According to the experimental results, the cement-based bonding agent according to claim 1 is preferably white Portland cement when used as a molded product or a coating material, and in the case of a molded product, it is easily colored and can be expected to be lightweight. . Further, the coating material requires workability for the purpose of coating. For this reason, by using white Portland cement with extremely low iron and manganese contents in the cement, the curing is not easily accelerated even when a curing agent such as water or resin is added, and the cement is easy to handle, and is lightweight and easily colored.

[0142] The quick-setting hardener and the retarder or the quick-setting cement, the quick-drying cement and the retarder in the cement-based bonding agent according to claim 2 are used for kneading paper or recycled paper and its sludge, or It leads to shortening of curing and drying time of the molded product. Paper and recycled paper and their sludge require a large amount of moisture when kneaded due to their properties. Therefore, in order to mass-produce, it is necessary to shorten the curing time of the molded product and to accelerate drying. By adjusting the quick-setting function and the quick-drying function with a retarder or the like, not only can the curing and drying be accelerated, but also the warping phenomenon due to the drying can be prevented, and the efficiency can be increased.

[015]

As described above, paper and recycled paper and their sludge, particularly sludge, are discharged in large quantities, but their recycling methods are almost entirely dependent on disposal. The present invention provides a method that can be used for various purposes such as building materials, blocks, pallets, paints, and the like.

[016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described.

Table 1 shows an example of the composition according to the present invention. In addition,
The mixing ratio shown in Table 1 indicates the mixing ratio of the solid content of each component. The powder or liquid of each component was mixed, and water was added at a ratio of 70% to the weight of the solid component to perform the following operation.

[0182] A gel formed by kneading for about 2 minutes is 20 cm x 20
Two molds having a height of 2 cm and a height of 2 cm were prepared, and the kneaded material was molded into a plate shape. After forced drying with hot air at 60 ° C for 3 hours, drying was performed at room temperature for 24 hours (temperature: about 10 ° C, humidity: about 50%).

After the above drying, one piece was put in water (about 10 ° C.) and floated on the surface of water. After 4 days, it sank into the water,
It was left as it was for 30 days, and the state of the compositional structure was confirmed. However, it was found that the composition did not change in hardness or the like with a tentacle, and that the compositional ratio in Table 1 did not destroy or deteriorate the compositional structure with water.

[020] In addition, in 180kgf / cm ² was the measurement of compressive strength to 10 days after molding, bending strength was 131kgf / cm ^2. Gas burner (about 1200 ° C) on the 10th day after molding
A fire resistance test and a non-flammability test were carried out using, but the flame did not rise and carbonized.

Next, the formulations of the examples are shown, but the present invention is not limited to these formulations.

[0222] Mixing of molded products of paper, recycled paper, and sludge Composition component% by weight Sludge of paper and recycled paper 40% Cement (white Portland) 45% Vinyl acetate 5% Curing agent (Superpar made by Onoda Co., Ltd.) 9.9% Retarder (Hardware setter manufactured by Onoda) 0.1%

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[Procedure amendment]

[Submission date] May 19, 2000 (2005.1.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Title of the Invention Paper containing groundwood pulp or chemical pulp,
And a method for producing a molded article or a coating material in which the paper treated with a chemical and the paper treated with a resin or its recycled paper and its sludge are recycled.

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[001]

BACKGROUND OF THE INVENTION The present invention relates to a method for recycling and forming or coating a large amount of sludge discharged in the stage of producing paper and recycled paper, thereby reducing the weight of the pulp containing fibrous materials, making it hard to crack, It can be used in various fields because it is possible to adjust the composition of highly inflammable to non-flammable ones and to mold and coat products with high sound absorption, sound insulation, heat insulation and chemical resistance.

For example, in the case of a pallet for a lift, a general standard made of synthetic resin is 1100 cm × 1100 cm, but even a lightweight one exceeds 10 kg. According to the production method of the present invention, the weight is as light as 8 kg or less with the same standard and no great difference in strength.

In addition, when molded into a building board, a nail can be used, and its performance is nonflammable and has a heat insulating effect.
High sound absorption and sound insulation effect, light weight and good workability. Further, spraying, brushing, roller, and the like can be used as the coating material, so that the field of application is wide.

[004]

2. Description of the Related Art Sludge discharged as non-recyclable during the production of paper and recycled paper has heretofore been scarcely utilized and incinerated or discarded.

[005]

Recently, most of incineration has been disposed of due to the problem of toxic smoke such as dioxin. In addition, the current situation is that disposal has reached its limit due to the reduction of laws and regulations, disposal sites, and the like. Therefore, the present invention is intended to reuse and re-use these discarded paper and recycled paper and their sludge by recycling them and forming them into products or as coatings. The conventional technology is difficult to commercialize, and even if it is made of paper, it has many problems such as low strength and hard to use, as it is paper, and it is flammable and safety cannot be ensured. It depends on the situation.

[006]

Means for Solving the Problems To solve the above problems, the present invention takes the following technical means.

The invention described in claim 1 of the present application uses a fibrous material contained in pulp and a cement-based inorganic bonding agent and an aqueous polymer material of resin and / or rubber to obtain a fiber-containing strength. It is possible to manufacture a molded article and a coating material having high viscosity, light weight, high adhesiveness, heat resistance, heat insulation, nonflammability, sound absorption, sound insulation, and chemical resistance.

The paper, the recycled paper and the sludge mentioned in claim 1 have a fibrous property. The above-mentioned features can be adjusted by mixing the cement-based inorganic bonding agent with an aqueous polymer material of resin and / or rubber at a ratio of 10 to 80% by weight. For example, paper and recycled paper, and those containing a large amount of sludge, are lightweight, have high viscosity and high bending strength, but have low heat resistance and noncombustibility. By utilizing these properties, adjustment can be made depending on the application.

[0109] The cement-based inorganic bonding agent can be used in an amount of 10 to 80% by weight, although it slightly varies depending on the above-mentioned target performance. hardness,
The preferred amount for ensuring strength, viscosity, noncombustibility, and weight reduction is
It can be adjusted depending on the application at 30 to 70% by weight.

[0102] Further, by containing an aqueous polymer material of resin and / or rubber, the particles of the cement-based bonding agent react with water to form a cement hydrate, and the aqueous polymer component is dehydrated. Dried to form a self-adhesive and adhesive polymer film, which firmly bonds the cement hydrate with paper and recycled paper and its sludge.

[0111] By using the cement-based inorganic bonding agent, bacteria that may propagate in the paper and re-made paper and the sludge thereof, particularly the sludge that is waste, according to claim 1, can be killed. . This is because the cement-based inorganic binder and the sludge are kneaded so that a high pH of the cement-based inorganic binder can kill bacteria that may propagate in the sludge.

[0122] Formulation examples are shown.

The pH was measured to be 12.4 ph. Next, the results of the antibacterial activity test of the present invention at the Japan Food Analysis Center are shown. The test results were obtained after 24 hours, and it is considered that the molded article and the coating material of the present invention can maintain a high ph for at least one month even under poor conditions. It is unlikely that bacteria will live in that environment based on the following test results.

[013] Antibacterial activity test result by dropping method Test bacterial measurement Sample Number of viable bacteria per sample Immediately after inoculation Control 1.6 × 10⁶  E. coli 35 ° C sample <10 After 24 hours control 5.0 × 10⁷  Immediately after inoculation Control 6.6 × 10^Five  Pseudomonas aeruginosa 35 ° C specimen <10 24 hours later control 1.4 × 10⁶ Yellow Immediately after inoculation Control 2.1 × 10⁶  Staphylococcus 35 ° C specimen <10 24 hours later control 5.8 × 10^Five  Immediately after inoculation Control 1.4 × 10⁶ MRSA 35 ℃ sample <10 24 hours later control 2.3 × 10⁶  Immediately after inoculation of black koji Control 6.3 × 10^Five  Mold 25 ℃ Sample 2.6 × 10^Three  24 hours later Control 7.7 × 10^Four  Bacterial solution adjustment solution: 1/500 NB medium (Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus) 1/200 NB medium (MRSA) 0.005% dioctyl sodium sulfosuccinate solution (Koji mold) <10: Not detected Control: Plastic Sharp Les

In this case, the greater the amount of the resin and / or rubber aqueous polymer substance, the more difficult it is to secure incombustibility, but the higher the adhesiveness, and the greater the cement-based bonding agent, the greater the incombustibility. The amount of the polymer material of the resin and / or rubber can be 1 to 60% by weight, but is preferably 3 to 20% by weight.

The aqueous polymer material of the resin and / or rubber is not particularly limited, but alkyl acrylate-acrylonitrile-methacrylic acid copolymer, vinyl acetate-veova copolymer, isoprene-acrylic acid copolymer Polymer, acrylate-acrylic acid copolymer, acrylate-methacrylic acid copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer,
Butadiene-styrene carboxyl elastomer, polyethylene carboxyl elastomer and the like.

[0161] The thus formed or coated material is characterized in that paper and recycled paper and its sludge exhibit a function as a moderating material, prevent cracking, and contain a resin and / or rubber aqueous polymer. By adjusting the ratio, the waterproof function, the adhesive function, and the compounding ratio of the cement-based inorganic bonding agent can be adjusted to confirm that heat resistance, nonflammability, heat insulation, sound insulation, sound absorption, and chemical resistance can be adjusted. Have been.

[0173] The cement-based inorganic bonding agent of claim 1 is not particularly limited, but according to the experimental results, white Portland cement is preferable when used as a molded article or a covering material, and in the case of a molded article, It is easy to color and light weight can be expected. Further, the coating material requires workability for the purpose of coating. For this reason, by using white Portland cement having extremely low iron and manganese content in the cement, the curing is not easily accelerated even when a curing agent such as water or resin is added, and the handling is easy and the coloring is easy.

[0182] By using a hardening agent and a retarder in the cement-based inorganic bonding agent according to the second aspect, it is possible to adjust the hardening and drying time of the molded article and the coating material. The paper, recycled paper and sludge described in claim 1 require a large amount of water when kneaded due to their properties. Therefore, drying requires a considerable amount of time. In order to improve the efficiency, it is necessary to shorten the curing time of the molded body and accelerate the drying. This can be solved by adjusting the cement-based inorganic bonding agent, the curing agent and the retarder. It can also be solved by adjusting commercially available quick-setting cement, quick-drying cement and its retarder.

Further, the use of the above-mentioned curing agent and the like causes a warping phenomenon in a dry state due to the properties of paper, re-papermaking and sludge according to the present invention, but has an effect of preventing the warping phenomenon. This is considered to be due to the fact that, by forming by accelerating the curing, the curing force is stronger than the reaction force. As for the drying temperature for preventing the warping, the function of the hardening agent is enhanced so that no warping occurs even at high temperature drying. In this case, high-temperature drying according to the experimental results is 50 ° C.
The low temperature means 10 to 50 ° C.

[0202] Claim 3 differs from Claims 1 and 2 in that a recycled product of an inorganic substance or an organic substance other than the present invention can be blended as an aggregate. A system material or the like can be blended as an aggregate.
In addition, a molded article and a coating material having characteristics in performance depending on the properties and composition of the aggregate can be expected.

[0220] The above-mentioned aggregate can be mixed with any of an inorganic substance and an organic substance. In the case of mixing, both the inorganic and organic substances preferably have a particle size of 5 mm or less. In particular, when used as a coating material, use of spraying, brushing, roller, etc. can be considered. In this case, particles of 1 mm or less are preferred for workability.

[0222] The aggregate is not limited to the following, but typical recycled products include tire rubber chips, resin powder, and concrete crushed products. Etc. can be blended.

[0213] The fragrance, pigment and deodorant referred to in claim 4 are not particularly limited, and are generally marketed deodorants, fragrances and pigments. When used mainly for indoor applications as molded articles and covering materials such as interior materials and partition walls, for example, by using an aromatic agent such as hinoki, the psychotropic effect and atmosphere can be enjoyed. Also, the paper and sludge referred to in claim 1 are not necessarily the same color,
In order to obtain a uniform product, a pigment is necessary and an aesthetic appearance can be secured.

[0243] A deodorant is used when the odor of the product itself is strong at festivals where recycled products are used as aggregate. For example, in the case of rubber chips of a tire, a strong odor is generated. Such an odor is not extinguished by a fragrance, but often becomes malodor by using a fragrance.

[0252] The glass or special glass is coated or poured with the product of the present invention. By using glass, a tile-shaped molded body having chemical resistance and no expansion and contraction due to cold and warm is completed. In this case, kgf / cm
² of 5 or more adhesion preferred. This is because, in the case of a transparent surface, for example, glass, when the pattern is broken, the pattern and the base are adhered to the glass surface, so that even if the film is cracked by the film effect, it is not scattered. The invention of the present application
Although it depends on the composition, an adhesive strength of kgf / cm ² 10 or more can be secured.

[026] The product of the present invention has been confirmed to be resistant to acid,
When using glass in the above molding method, food factory,
Not only is it good news for pickle factories and other companies suffering from acid resistance, it can be used for the housing industry and other purposes simply by changing the quality of glass.

The molding method according to claim 1 is not limited to the method described above, and the molded body is manufactured by a method such as extrusion molding, vacuum molding, cast molding, injection molding, etc. ,Four
Means all molding methods using a part or all of the molding.

[028]

As described above, paper and recycled paper and their sludge, particularly sludge, are discharged in large quantities, but their recycling methods are almost entirely dependent on disposal. The present invention provides a method that can be used for various purposes such as house building materials, blocks, tiles, pallets, paints, heat insulating materials, non-combustible materials, interior products, and the like, although not particularly limited.

[029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described.

[030]

[034] An example of the composition according to the present invention is shown below. In addition, the compounding ratio shown shows the compounding ratio of the solid content of each component. The powder or liquid of each component was mixed, and water was added at a ratio of 70% to the weight of the solid component to perform the following operation.

[031] A gel that was kneaded for about 2 minutes was 20 cm x 20
A mold having a height of 2 cm and a height of 2 cm was prepared, and the kneaded product was formed into a plate shape. After forced drying with hot air at 60 ° C for 3 hours, drying was performed at room temperature for 24 hours (temperature: about 10 ° C, humidity: about 50%).

[0332] After the above-mentioned drying, one of the pieces was put in water (about 10 ° C) and floated on the surface of the water. After 4 days, it sank into the water,
It was left as it was for 30 days, and the state of the compositional structure was confirmed. However, it was found that the composition did not change in hardness or the like with a tentacle, and that the compositional ratio in Table 1 did not destroy or deteriorate the compositional structure with water.

[033] In addition, in 180kgf / cm ² was the measurement of compressive strength to 10 days after molding, bending strength was 131kgf / cm ^2. Gas burner (about 1200 ° C) on the 10th day after molding
A fire resistance test and a non-flammability test were carried out using, but the flame did not rise and carbonized. There was almost no smoke.

[034] A heat insulation analysis system was used to conduct a comparative test of heat insulation. The test specimen used had a glass wall thickness of 50 mm and a thickness of 20 mm according to the following composition of the present invention. The present invention glass wool Surface temperature 22 ° C to 23 ° C After 5 minutes Max 26 ° C 51 ° C 500W

[035] A comparative test of acid resistance was performed. Glacial acetic acid was applied daily to the surface of a 20 mm thick mortar cement using glacial acetic acid ph 2.2 and the surface of a 20 mm thick plate-shaped specimen prepared according to the present invention, and observed. When the surfaces were compared on the 15th day, the mortar surface was deteriorated and powdery. Although the discoloration was observed in the product of the present invention, it did not deteriorate and the structure did not change.

Next, the composition of the examples is shown, but the present invention is not limited to this composition.

[037] Mixing of molded products of paper, recycled paper, and sludge Composition component% by weight Sludge of paper and recycled paper 40% Cement (white Portland) 45% Vinyl acetate 5% Hardening agent (Superpar made by Onoda Co., Ltd.) 9.9% Retarder (Hardware setter manufactured by Onoda) 0.1%

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Claims (2)

[Claims] 1. A paper containing groundwood pulp or a chemical pulp, or a recycled paper and its sludge, all or any one thereof, and a cement-based inorganic binder and an aqueous polymer material of resin and / or rubber. A molded article and a covering material, characterized by comprising: 2. Among those described in claim 1, those in which a quick-setting hardening agent and a retarding agent are blended with a cement-based inorganic bonding agent, or those using a kind of quick-setting cement or quick-drying cement, and Using a retarder.