JP3160604B2 - Manufacturing method of used paper civil engineering building materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a material for civil engineering and construction using waste paper such as newspaper, magazine, wrapping paper and the like.

[0002]

2. Description of the Related Art As the trend of preventing the destruction of the natural environment and conserving paper resources increases worldwide, recycling technology has been developed to use newspapers, magazines, wrapping paper, documents, etc. discarded from homes and factories. Many recycled papers are used. The recycled paper is generally recycled through the following steps.
Put warm water, waste paper and chemicals (caustic soda, etc.) dissolving material in a stirrer and dissolve it by stirring, and the printing ink separates. Put it in the separator and separate it into foam, which is generated The printing ink is adhered and removed, and at the same time other foreign substances are removed. Furthermore, the chemical pulp is mixed and stirred with the regenerated pulp that has been cleaned through a washing machine to produce a dissolved pulp. Furthermore, the dissolving pulp is thinly flowed on a dewatered paper layer forming net, made into paper, dewatered under pressure, applied with a water absorption roller, then steam-dried or heat-dried, then coated with starch and steam-dried. Is pressed with a roller to finish a smooth and glossy paper surface and recycle paper.

[0003]

Although the technology for recycling recycled paper has been established in this way, it is extremely small compared to the amount of newspapers, magazines, etc. discarded from homes, and most of it is incinerated. It was in a state of being sanctioned.

Accordingly, the present inventor has found that in civil engineering and construction technology in which cement, gravel, wood, and synthetic resin are consumed in large amounts, a large amount of waste paper is effectively reused for formwork, walls, floors, and many other uses. As a result of conducting various studies with the aim of developing usable civil engineering building materials, the adhering strength of paper fibers was improved due to the slight mixing of printing ink and foreign matter, and the strength required for civil engineering building materials was enhanced. Furthermore, it was found that the addition of a vinyl acetate resin emulsion or cement can produce a material for civil engineering and construction with higher strength.
The present invention has been made based on such knowledge.

[0005]

The gist of attaining the object of the present invention is as follows.
Mix up to 30 times of water, stir and sludge waste paper sludge, wrap it in a water-permeable sheet, put it in a drainage molding frame and spontaneously dehydrate it. After dehydrating by pressing, or wrapping in a water-permeable sheet and dehydrating by 60 to 80% of the total weight, blending and kneading a vinyl acetate resin emulsion, placing in a drainage molding frame, and forcibly dehydrating by pressing Or, after dewatering 50 to 70% of the total weight by wrapping in a water-permeable sheet, compounding and kneading with cement, forcedly dewatering in a drainage molding frame, and then drying. This is a method for manufacturing materials for civil engineering and construction.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. In the present invention, used papers such as newspapers, magazines, books, wrapping paper, cardboard, documents, etc., which are discarded from homes and factories, are used as raw materials. The quality, size, color and the like of the used paper are not particularly limited, but a small piece of paper cut from the manufacturing method of the present invention described below is optimal. The waste paper is immersed in water and stirred for the reason that the waste paper can be made into a muddy state to obtain a material for civil engineering and construction having excellent toughness. The agitation is to make the waste paper suck water and make it muddy.
A sufficient amount of water is needed to make it fluid. The amount is such that 10 to 30 times water is blended with respect to 1 of waste paper by weight ratio. If the amount of water is, for example, 1 kg of waste paper
If the blending amount is less than 0 kg, the paper sucks in water and the stirring operation is difficult, and there is a problem that the slurry cannot be made into a muddy state. There is a problem that the dehydration and drying work requires a long time. Used paper stirred with such moderate water,
It is adjusted to an appropriate degree, and becomes sludge of used muddy paper containing printing ink and impurities. The sludge of waste paper that has become muddy in this way is used to prevent early drying of the surface layer and to uniformly dehydrate the inner and outer layers. It is placed in a drainage molding frame that has the function of drainage and has the shape of a product for civil engineering products, and is naturally dried. However, in this state, since it has a large amount of moisture, it is not provided for products used in civil engineering and building materials. In the present invention, in order to further increase the toughness of the material into a dense structure and obtain a product having a desired thickness, one or more laminated synthetic materials are mechanically pressed or further pressed. Forcibly dehydrate using heat and wind power. After that, it is air-dried, and the remaining moisture is completely removed by a forced press dewatering operation. The civil engineering building material manufactured in this manner can be cut and slightly bent, and is most suitable as a lightweight and tough civil engineering building member.

Further, the present invention relates to a method for producing a civil engineering building material which can be freely bent or folded by sprinkling with water. It is packaged and subjected to 60-80% dehydration by weight. This dehydration operation requires water of 40% to 20% for kneading in the next step, and is for better adhesion. In a dehydration operation with a high water content of less than 60%, the chemical becomes thin by mixing in the next step. In addition, in the dehydration operation in which the water content is less than 80%, in the mixing in the next step, the water content is insufficient and an extra drug is required, so that the kneading takes time. Therefore, in the next step, 60% to 80% dehydration is performed so as to facilitate the mixing and kneading of the chemicals.
A vinyl acetate resin emulsion is added (blended) to such sludge of semi-mud-like waste paper and kneaded. By mixing and kneading the vinyl acetate resin emulsion with the used paper sludge, the adhesive strength is increased and folding can be freely performed.
Although the amount of addition is not particularly limited, if the amount of the vinyl acetate resin emulsion exceeds the amount of waste paper, the purpose is not achieved and the amount is set to the same amount at the maximum. Preferred is the addition of 10% to 30% of the dewatered weight. The sludge of the semi-mud-like waste paper kneaded in this manner is put into a water-repellent mold, forcibly depressed and dewatered, and then naturally dried, in the same manner as the above-mentioned operation. The material for civil engineering and construction of the present invention manufactured in this manner has characteristics that it can be bent and folded freely and can be easily processed in various ways.

Further, the present invention relates to a method for producing a material for civil engineering and construction, which absorbs and retains water without breaking the mold even if the mold is sprinkled with water, and maintains the shape as it is. The sludge of the produced sludge waste paper is wrapped in a water-permeable sheet and subjected to 50-70% dehydration in total weight ratio. This dehydration operation is indispensable for the next step, and water in this range is required for mixing with the drug.
In addition, in a dehydration operation in which the amount of water is less than 50%, the medicine becomes thin, the adhesive strength becomes weak, and the mold is easily broken. In addition, in a dehydration operation in which the water content is less than 70%, the shape is easily broken because the water does not mix well with the medicine. Therefore, 50% to 70% dehydration is performed so as to be able to mix well with waste paper sludge. Cement is added to the sludge of such semi-muddy waste paper. Cement is a natural-friendly material that replaces asphalt by providing mold retention and adhesion to sludge made of semi-muddy waste paper. The amount of addition is not particularly limited, but it is preferable to add 10% to 40% of the weight of the cement after dehydration according to the necessity of maintenance of the shape, adhesion and strength. After mixing in this manner, the kneading agent (cement) is kneaded so as to be evenly mixed with the used paper sludge. Then, as in the above-described operation, the mixture is put into a drainage molding frame, subjected to forced press dewatering, and then naturally dried. . The material for civil engineering and construction of the present invention produced in this manner is similar to asphalt when there is no moisture, but has the property of becoming elastic and soft when moisture is absorbed and maintaining its shape without breaking. Things.

[0009]

[Experimental Examples] Examples of the present invention will be described below. In addition, the comparative example shows an experimental example in a range deviating from the present invention.

[Example I]

[Example 1] 20 times water (20 kg) for 1 kg of waste paper
The sludge of waste paper sludge made into a muddy state by a rotary stirrer (2600 rpm) after being immersed in water, wrapped in a water-permeable cloth sheet, placed in a board-shaped molding frame for building materials, and naturally dewatered, and then pressed with a pressing force of 10 kg Dehydrated, then air-dry for 3 days in the shade, and use a building material board (thickness 10 mm x width 12).
0 × length 200) A product was produced.

Example 2 The sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, placed in a molding frame in the form of a board for building material, naturally dehydrated, and then uniformly pressed on the entire surface of the board with a hand pressure (35 kg). The dehydration was carried out while paying attention so as to be hung, and then naturally dried for 4 days in the shade to produce a building material board (thickness 16 mm × width 120 × length 200).

Example 3 The board for a building material of the intermediate product after natural dehydration obtained in Example 1 was dehydrated with a pressing machine having a pressing force of 80 kg, and then naturally dried for 2 days in a drying chamber maintained at a temperature of 30 ° C. And building material board (8mm thick x 120mm wide)
Length 200) The product was manufactured.

Fourth Embodiment Two boards for a building material of an intermediate product after natural dehydration obtained in the same manner as in the first embodiment are overlaid with a pressing force of 10
It was dehydrated with a 0 kg press and then naturally dried for three days in the shade to produce a building material board (18 mm thick x 120 width x 200 length).

[Example 5] 10 times water (10 kg) for 1 kg of waste paper
After being immersed in water, sludge of waste paper made muddy with a rotary stirrer (2600 rpm) was used under the same conditions as in Example 1,
A board for building materials (thickness 10 mm × width 120 × length 200) was manufactured.

[Example 6] 30 times water (30 kg) for 1 kg of waste paper
After being immersed in water, sludge of waste paper made muddy with a rotary stirrer (2600 rpm) was used under the same conditions as in Example 1,
A board for building materials (thickness 10 mm × width 120 × length 200) was manufactured.

[Comparative Example 1] A board for construction material was immersed in 1 kg of waste paper in 8 times water (8 kg), and then sludge made with a rotary stirrer (2600 rpm) using sludge of waste paper under the same conditions as in Example 1 under the same conditions. A product (thickness 10 mm × width 120 × length 200) was manufactured.

[Comparative Example 2] 35 times water (35 kg) for 1 kg of waste paper
A board for building material (thickness: 10 mm × width: 120 × length: 200) was manufactured under the same conditions as in Example 1 using sludge of waste paper which had been immersed in a rotary stirrer (2600 rpm) and made into a muddy state. As shown in Table 1, the test results of the board for building materials obtained in the manufacturing process as described above show that the strength of the present invention is 3 kg or more, the adhesive strength of the paper fiber is strong, and the bending angle before cracking is also a comparative example. It can be used as a board for building materials because it is higher than. The product manufactured in the comparative example has elasticity and is gentle to the human body and can be used as various auxiliary materials.However, since the blending amount of waste paper and water deviates from the present invention, the ink oil of the waste paper is converted from sludge. It cannot be separated and mixed well with the paper fiber, so that the adhesive strength is reduced and properties such as strength required for building materials cannot be obtained.

Example II

Example 7 Waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then 0.7 kg of vinyl acetate resin. The emulsion is blended and kneaded so that it is evenly mixed with the paper fiber. It is then placed in a board-shaped drainage molding frame for building materials and dehydrated with hand pressure (35 kg). Board (thickness 10mm x
A product (width 100 × length 200) was produced.

Example 8 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then 0.8 kg of vinyl acetate resin. The emulsion is blended and kneaded so as to be evenly mixed with the paper fiber, placed in a drainage molded frame in the form of a board for building material, dehydrated by a pressing machine with a pressing force of 80 kg, and then in a drying room maintained at a temperature of 30 ° C. It was air-dried for 2 days to produce a building board (5 mm thick × 100 × width × 200) product.

Example 9 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then 1.2 kg of vinyl acetate resin. The emulsion is blended and kneaded so as to be evenly mixed with the paper fiber, placed in a board-shaped drainage molding frame for building material, and dehydrated with a pressing machine with a pressing force of 80 kg.
Air-dry for a day, and build material board (7mm thick x 10 width)
0 × length 200) A product was produced.

Example 10 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 80% (21 kg sludge to 4.2 kg) by weight, and then 0.9 kg of vinyl acetate. The resin emulsion was mixed and kneaded, placed in a drainage molding frame in the shape of a building material board, dehydrated with a pressing machine with a pressing force of 80 kg, and then air-dried in the shade for 2 days to give a building material board (thickness 5 mm x width 100 mm). × length 200) A product was manufactured.

Example 11 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 60% by weight (21 kg sludge to 8.4 kg), and then 0.7 kg of vinyl acetate resin. The emulsion is compounded and kneaded, placed in a drainage molded frame in the shape of a board for building material, dehydrated with a pressing machine with a pressing force of 50 kg, and then naturally dried in the shade for 4 days to obtain a board for building material (thickness 5 mm × width) 100 × length 200) A product was produced.

Comparative Example 3 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 55% by weight (21 kg sludge to 9.45 kg), and then 0.7 kg of vinyl acetate resin. The emulsion was compounded and kneaded, placed in a drainage molding frame in the form of a board for building material, dehydrated with a press machine with a cape pressure of 80 kg, and then naturally dried in the shade for 4 days to obtain a board for building material (thickness 10 mm x width 100 mm). × length 200) A product was manufactured.

Comparative Example 4 Waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 85% by weight (21 kg sludge to 3.15 kg), and then 0.7 kg of vinyl acetate. The resin emulsion is compounded and kneaded, placed in a drainage molding frame in the form of a board for building materials, dehydrated with a pressing machine with a pressing force of 80 kg, and then air-dried for 3 days in the shade to form a board for building materials (thickness 5 mm x width) 100 × length 200) A product was produced. As shown in Table 2, the test results of the building material board obtained in the above manufacturing process show that the strength (gravity until bending) of the present invention can be improved by blending the vinyl acetate resin emulsion with the paper fiber adhesive force. It can be used as a decorative board for interior work requiring a bending angle because it is strong and has an extremely large angle before cracking. In addition, although the product manufactured in the comparative example has elasticity, the amount of dewatering at the time of wrapping on a cloth sheet and the amount of used paper and water deviating from the present invention deviate from the present invention. Adhesion between paper fibers is reduced, and properties such as strength required for building materials cannot be obtained. In particular, the bending angle of the comparative example is comparable to that of the present invention but is not suitable for building materials because of its low strength.

Example III

Example 12 Waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then 0.7 kg cement.
Is mixed and kneaded, put into a drainage molding frame in the form of a board for building material, dehydrated with a pressing machine with a pressing force of 80 kg, and then naturally dried for 2 days in the shade to build a board for building material (20 mm thick).
A product (width 100 × length 200) was produced.

Example 13 The used paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then mixed with 1 kg of cement and kneaded. Then, it is put into a drainage molding frame in the form of a board for building materials, dewatered by a press machine with a pressing force of 80 kg, and then naturally dried for 2 days in the shade to produce a board for building materials (thickness 40 mm x width 200 x length 200). Was manufactured.

Example 14 Waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 70% by weight (21 kg sludge to 6.3 kg), and then 1.2 kg cement.
Is mixed and kneaded, placed in a drainage molding frame in the form of a board for building material, dehydrated with a pressing machine with a pressing force of 50 kg, and then naturally dried for two days in direct sunlight to form a board for building material (40 m thick).
mx 100 width x 200 length).

Example 15 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 60% by weight (21 kg sludge to 8.4 kg), and then 1.5 kg of cement.
Is mixed and kneaded, placed in a drainage molding frame in the form of a board for building material, dehydrated with a pressing machine with a pressing force of 50 kg, and then naturally dried in the shade to dry for 3 days.
X width 200 x length 200).

Example 16 The waste paper sludge obtained in Example 1 was packed in a water-permeable cloth sheet, dehydrated by 60% by weight (21 kg sludge to 8.4 kg), and then cement 0.8 kg.
Is mixed and kneaded, placed in a drainage molding frame in the form of a board for building materials, dehydrated with a pressing machine with a pressing force of 80 kg, and then naturally dried for two days under direct sunlight to form a board for building materials (thickness 2).
0 mm x width 200 x length 200).

Example 17 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 50% by weight (21 kg sludge to 10.5 kg), and then mixed with 1 kg of cement and kneaded. Then, it is put into a drainage molding frame in the form of a board for building material, dehydrated with a press machine with a pressing force of 80 kg, and then naturally dried for two days under direct sunlight to make a board for building material (thickness 3).
(0 mm x width 300 x length 300).

Comparative Example 5 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 80% by weight (21 kg sludge to 4.2 kg), and then 0.5 kg of cement was added. Kneading, put into a drainage molding frame in the shape of a board for building materials, dehydrate with a pressing machine with a pressing force of 80 kg, and then naturally dry for 3 days in the shade to build a board for building materials (thickness 10 mm x width 200 x length 200) Manufactured product.

Comparative Example 6 The waste paper sludge obtained in Example 1 was wrapped in a water-permeable cloth sheet, dehydrated by 55% by weight (21 kg sludge to 11.55 kg), and then cement 0.5k
g was mixed and kneaded, put into a drainage molding frame in the form of a board for building materials, dehydrated with a pressing machine with a pressing force of 80 kg, and then naturally dried for 2 days in direct sunlight to form a board for building materials (thickness: 20 mm).
mm x width 200 x length 200). As shown in Table 3, the test results of the building material boards obtained in the manufacturing process as described above show that the strength of the present invention is such that the adhesiveness between the paper fibers is further enhanced by blending the cement, and even if the board is wet with water. Maintains shape without breaking even when gravity of 80 kg is added. Note that all the products manufactured in the comparative examples are defective products and deviate from the present invention, so that the characteristics of the strength (the result of a drop test with a weight higher than 1 m) cannot be obtained.

[0010]

The present invention is excellent in elasticity, has warmth of paper, and is gentle to the human body. By increasing the strength, it becomes closer to trees and becomes harder and warmer. Also, by blending a vinyl acetate resin emulsion, folding and bending can be easily performed and processing is simple. In addition, by mixing the cement, the mold remains as it is and retains water as it is molded, drains if the water retention capacity is increased, and if dried, this product has the intermediate strength between concrete and asfort and is lightweight. It can be used from the first floor to the middle floor of the roof. Also, in the era of waste paper, there is a search for a recycling method with different uses of paper, and the present invention will help with this, and in the future, will trigger the reuse of resources for other uses, the present invention itself, We believe that it will be used not only in the architectural world but also in various directions. In addition, we believe that the use of recycled paper for civil engineering and construction is primarily intended for paper (wood) fibers, so that it is gentle on the human body and can be used in place of wood. There are still undiscovered uses, which are used in various fields and will definitely contribute.

Claims (3)

(57) [Claims] 1. A weight ratio of 1 to waste paper of 10 to 10
30 times water is mixed, stirred, and the sludge made of sludge waste paper is wrapped in a water-permeable sheet, placed in a drainage molding frame and spontaneously dewatered, and then laminated to one or more sheets. A method for producing used paper-made civil engineering building materials, comprising forcibly dewatering the synthesized material and then drying it. 2. The weight ratio of used paper to 1 is 10 to 10.
30 times water is mixed, stirred and the sludge of sludge waste paper is wrapped in a water-permeable sheet, and 60-80% of the total weight ratio
A method for manufacturing used paper-made civil engineering building materials, comprising dewatering, mixing, kneading and kneading a vinyl acetate resin emulsion, forcibly pressing and dewatering in a drainage molding frame, and then drying. 3. The weight ratio of used paper to 1 is 10 to 10.
30 times water is mixed, stirred, and the sludge of sludge waste paper is wrapped in a water-permeable sheet, and the weight ratio of 50-70
%, Dewatered, mixed with cement and kneaded, forcedly dewatered in a drainage molding frame, and then dried.