JP2000313646A - Recycled board using synthetic resin wall paper as raw material and production of the recycled board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize resources by recycling synthetic resin wall paper as a waste material, and to resolve garbage disposal problem as well. SOLUTION: A pulverized product of synthetic resin wall paper as a waste material is incorporated with a cement-based or ceramic coagulant, water, and, as necessary, inorganic lightweight aggregate and/or water-soluble cellulose ester, etc., the resulting mixture is then kneaded and subsequently trimmed into a necessary form using an extrusion molding machine or press molding machine, and the resulting form is dried and hardened to obtain the objective recycled board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an unnecessary synthetic resin wallpaper obtained by coating or laminating a polyvinyl chloride, polypropylene, polyolefin, acrylic resin or other thermoplastic synthetic resin on the surface of paper as a base material. The present invention relates to a recycled board which is used for civil engineering, construction materials, etc., which has high robustness, flame retardancy and elasticity in consideration of environmental safety and resource protection.

[0002]

2. Description of the Related Art Conventionally, sludge generated when recycled paper is obtained from waste paper is treated by kneading sludge and a flame-retardant solidifying agent to solidify the sludge and solidifying the sludge. There is an example of producing a flame-retardant building material (artificial wood). As the flame-retardant solidifying agent, Portland cement, alumina cement, quick-drying cement and white cement alone or in combination (however, a combination of alumina cement and another cement) Except for the addition of aluminum hydroxide and / or aluminum phosphate, calcium chloride and / or magnesium chloride, sodium phosphate and / or ammonium phosphate in order to improve flame retardancy (see, for example, No. 8-217518).

In the treatment of industrial waste, for example, factory effluents and sludge containing toxic components of chemicals, toxic components are extremely low in concentration (each toxic component has a legally regulated concentration).
They are decomposed or neutralized to make them non-toxic, and solids (sludge) are also solidified according to a predetermined standard for landfill treatment.

[0004] In the case of wallpaper, scraps (cut pieces) generated during factory production, etc., together with many other combustibles, have been incinerated in facilities equipped with certain conditions, together with many other combustible materials.

[0005]

However, since vinyl chloride is used in recent building materials, for example, the vinyl wallpaper of the synthetic resin wallpaper, if such a synthetic resin wallpaper is incinerated, hydrogen chloride or the like is generated. Has occurred and is now a problem as pollution.

Further, even if left undisturbed for fear of generation of dioxin generated by incineration, it does not rot for a long time.

In the case of synthetic resin wallpaper, it takes time and effort to separate the base material wallpaper and the synthetic resin on the surface in order to treat it in consideration of the environment and safety.
Further, there is a problem that even if the landfill treatment is performed as it is, it hardly rots due to its material, and is unsuitable for landfill.

[0008] The present invention solves these problems and effectively reuses synthetic resin wallpaper as a recycled board for building materials and the like that are robust and have excellent elasticity, flame retardancy, soundproofing, and water absorption. With the goal.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, of the present invention, the invention according to claim 1 is characterized in that the pulverized synthetic resin wallpaper which has become waste material and the cement or ceramic solidified The kneaded product of the agent and water is formed into a predetermined shape,
This is a recycled board made from synthetic resin wallpaper obtained by drying and solidifying this.

A second aspect of the invention is characterized in that a configuration in which an inorganic lightweight aggregate is mixed is added to the configuration of the first aspect of the invention.

A third aspect of the invention is characterized in that a configuration in which a water-soluble cellulose ester is mixed is added to the configuration of the first or second aspect of the invention.

According to a fourth aspect of the present invention, 100 parts by weight of a cement or ceramic coagulant and 40 to 65 parts by weight of water are added to 25 to 34 parts by weight of a crushed synthetic resin wallpaper, and the mixture is kneaded. After that, a method for producing a recycled board using synthetic resin wallpaper as a raw material is characterized in that a desired shape is formed by extrusion or press molding, followed by drying and solidification.

According to a fifth aspect of the present invention, in the method of the fourth aspect, 7 to 34 parts by weight of an inorganic lightweight aggregate is added before kneading.

According to a sixth aspect of the invention, there is provided the method of the fourth or fifth aspect, wherein 1 to 3 parts by weight of a water-soluble cellulose ester is added before kneading.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention disposes of unnecessary synthetic resin wallpaper (hereinafter, simply referred to as waste wallpaper) such as defective products, waste, cut chips (cut pieces), and peeled wallpaper generated during wallpaper manufacturing. At this time, the waste wallpaper is pulverized in advance as a main material, a cement-based coagulant or a ceramic-based coagulant for solidifying the same, and water is added and kneaded to form a muddy state. A recycle board having a predetermined shape is obtained by extrusion molding or press molding in between.

[0016] The specific suitable range of blending is that any one of Portland cement, quick-drying cement, white cement and mortar alone or a combination thereof is used for 25 to 34 parts by weight of the crushed waste wallpaper as the main raw material. 100 parts by weight of a cement-based coagulant and 40 to 70 parts by weight of water.
In addition, a pH adjuster for promoting the hydration reaction of cement in the process of commercialization, a filler, a lubricating agent for facilitating molding, etc., are each required according to the selection of the coagulant, Has been added.

[0017]

<Embodiment 1> First, based on the above, looking at an embodiment, a crushed waste wallpaper as a main material 25.
3 parts by weight (14.4%: numerical values in the table are rounded, the same applies hereinafter) and 100 parts by weight of cement-based coagulant (57.1%)
In order to reduce the weight, 8.0 parts by weight (4.6%) of balun and 40 parts by weight of water (2
2.8%) and 1.9 parts by weight (1.1%) of a water-soluble cellulose ester as a lubricant at the time of extrusion molding were kneaded, and the resulting kneaded material was 11.6 mm thick. The physical properties of the recycled board molded as described above are as shown in the column of Example 1 in Table 1.

[0018]

[Table 1]

Example 2 In Example 2, the composition was the same and the number of parts was changed.
3.3 parts by weight (14.3%) of 100% cement coagulant
Parts (42.9%), 33.3 parts (14.3%) of Thomas Balun and 64.3 parts (27.5%) of water, and further added water-soluble as a lubricant during extrusion molding. This shows a recycled board formed by kneading a mixture to which 2.4 parts by weight (1.0%) of a hydrophilic cellulose ester is added, and using the mixture as a raw material.

When comparing the first and second embodiments, the first embodiment
By mixing 14.2% of the cement coagulant more than in Example 2, not only the flexural strength is increased but also the amount of deflection is slightly increased. Therefore, when the amount of deflection is important, economic considerations are taken into consideration. It is clear that it is not necessary to increase the amount of cement coagulant. In addition, impact resistance is sufficiently secured, and no particular inconvenience is observed.

In the present invention, the cement-based coagulant is selected from the group consisting of Portland cement, quick-drying cement, white cement and mortar, and these are used alone or in combination. When the above-mentioned white cement is selected as the coagulant, it is suitable for obtaining a clear and beautiful product which is easy to color.

In addition to the above, an alumina cement containing a large amount of silica may be used alone as a coagulant for the waste wallpaper, and an inorganic lightweight aggregate may be mixed for material reduction or product weight reduction. In this way, when alumina cement is used as a coagulant, the manufactured recycled board is hard and brittle, so it is suitable when only strength is required, but it is not suitable for products requiring elasticity. Improper.

In addition, it is preferable to select the cheapest mortar, the most typical Portland cement which is most commonly used, or the quick-drying cement which is a little more expensive, for products which do not require much strength.

The inorganic lightweight aggregate used to reduce the weight of the recycled board includes glass balun, shirasu (lime) balun, and fire lime balun, and is kneaded together with a cement-based coagulant.

<Example 3> As shown in Example 3, 23.8 parts by weight of ground waste wallpaper (1
3.7%), 100.0 parts by weight (57.6%) of ceramic coagulant, 7.5 parts by weight (4.3%) of balun, 40.4 parts by weight of water (23.3%) The water-soluble cellulose ester was used as a lubricant during extrusion molding.
8 parts by weight (1.0%) were added and kneaded, and a recycled board having a thickness of 11.1 mm was extruded from the mixture and used as a raw material.

Example 4 Example 4 is a case where the composition was the same and only the number of parts was changed. That is, 33.3 parts by weight (13.9%) of waste wallpaper, 100.0 parts by weight (41.8%) of a ceramic coagulant, and 33.3% by weight of balun.
3 parts by weight (13.9%), water 70.2 parts by weight (29.3%)
%), 2.4 parts by weight of a water-soluble cellulose ester (1.0% by weight).
%) Shows the physical properties of the recycled board obtained by adding the same.

In Example 4, the blending ratio of the ceramic coagulant was smaller than that in Example 3, but no significant change was observed in the flexural strength.
The deflection amounts are about 4 times, 17 times, and 1.3 times, respectively, of 2 and 3, indicating that the product is a tough and tough recycled product. No abnormalities were observed in any of the shocks.

The ceramic coagulant is used alone, not in combination with other cements and mortars. The recycled board using the ceramic coagulant is extremely robust and is suitable for products requiring strength.

In the case of a product that does not require much strength, it is preferable to select inexpensive mortar or portland cement, or a slightly more expensive quick-drying cement. In addition, a better product can be obtained by appropriately selecting and mixing a coagulant so that the characteristics can be sufficiently exhibited according to the purpose of use.

As described above, the recycled board of the present invention not only differs in the physical properties of the recycled board depending on whether the coagulant added for solidification is of cement type or ceramic type, but also of the former cement type solidification agent. The properties of the product differ depending on which cement alone is used or which is used in combination with the agent, which greatly affects the economic efficiency.

Next, the manufacturing process of the recycled board of the present invention will be described with reference to the process chart of FIG. The waste wallpaper peeled off from the wall or cut for size adjustment is introduced into a crusher or crusher in the previous step, and the whole is crushed into a fine flocculent shape without leaving a prototype of the waste wallpaper.

Then, a predetermined amount of waste wallpaper pulverized and flocculent in this manner, a cement-based coagulant (or ceramic-based coagulant), and, if necessary, an inorganic lightweight aggregate (glass balun, shirasu balun, etc.) (Balun), water-soluble cellulose ester, etc. from each silo (not shown) from each mixer (shower ring mixer)
Is automatically supplied to a predetermined blending amount set in advance, and is stirred and mixed for several minutes in a dry operation without adding water.

When water is added from the beginning, viscosity is generated and uniform mixing cannot be achieved early, and hydration reaction between water and a cement-based coagulant proceeds during mixing of several types of materials. First, dry operation is performed for a certain period of time, and after mixing is completed, wet operation is started while opening the inlet of the water storage tank and water is injected, and kneading is performed for a certain period of time. At this time, a pH adjuster is added, and the mixture is kneaded in a muddy manner while adjusting the pH.

The input amount of water is set to the minimum necessary amount, and after completion of the wet operation, the kneaded waste material is fed from a mixer to a kneader by a conveyor.

In the kneader, since all the compounding materials have already been charged, the water is further supplied and the mixture is sufficiently kneaded while adjusting the degree of kneading (viscosity) so that the molding is most easily performed.

The kneaded material whose viscosity has been adjusted is sent to an extruder by a conveyor, and is extruded into a predetermined sectional shape. At this time, before the molding, the path through which the kneading material in the extruder passes and the latent air in the kneading material are sufficiently degassed in a vacuum chamber to maintain a dense state. A release agent is appropriately added.

In the case of press molding, after the above-mentioned extrusion molding is performed, it may be sent to a press molding machine to perform pressure molding, or the kneaded material discharged from the kneader may be directly supplied to the press molding machine. It may be molded.

The extruded strip-shaped molded product having a constant width and thickness is taken out on a tray previously coated with a release agent,
It is cut into a fixed length and width by a water cutter or the like to form a primary molded product (usually a board).
Stack) and cure indoors or outdoors. Thereby, the molded product is solidified by the hydration reaction of the cement-based coagulant mixed therein.

The plate-shaped primary molded product thus solidified is cut into various sizes by a dust-proof cutter, and further subjected to necessary processing in the final processing means, so that the final product ( (Secondary product).

In the case of a product by press molding,
The kneader, or the plate-shaped primary product taken out from the extrusion molding machine is sent to a press molding machine, pressure-molded before solidification, pipes, planters, etc., molded into various shapes, cured, solidified, The desired product can also be obtained.

[0041]

As described above, since the recycled board of the present invention uses waste synthetic resin wallpaper as a raw material, resources can be effectively used, and when this kind of synthetic resin wallpaper is discarded. Various problems such as the problem of waste disposal are solved.

Further, in the method for producing a recycled board of the present invention, a lightweight, hard, and durable resin wallpaper is obtained by using a cement-based or a ceramic-based as a coagulant for solidifying the synthetic resin wallpaper. It is easy to obtain useful recycled boards in the industrial industry,
Mass production as an industrial product is also possible.

Further, depending on whether glass balun, silas balun, other mineral balun, etc. are selected and used alone or in combination among inorganic lightweight aggregates, they are not only hard and light, but also water-absorbing and soundproof. Since recycled boards having various properties such as flame retardancy, buffer effect and the like can be obtained, they can be widely used.

[Brief description of the drawings]

FIG. 1 is a manufacturing process diagram of a recycled board according to the present invention.

Claims (6)

[Claims] 1. A synthetic resin wallpaper obtained by molding a kneaded material of waste synthetic resin wallpaper, a cement-based or ceramic-based coagulant, and water into a predetermined shape, and drying and solidifying the kneaded material. And recycled board. 2. The recycled board made of synthetic resin wallpaper according to claim 1, wherein an inorganic lightweight aggregate is mixed. 3. The recycled board made of synthetic resin wallpaper according to claim 1, wherein a water-soluble cellulose ester is mixed therein. 4. To 25 to 34 parts by weight of a crushed synthetic resin wallpaper, 100 parts by weight of a cement-based or ceramic-based coagulant and 40 to 65 parts by weight of water are added, kneaded and then extruded or A method for producing a recycled board using synthetic resin wallpaper as a raw material, wherein the recycled board is formed into a desired shape by press molding and dried and solidified. 5. The method for producing a recycled board using synthetic resin wallpaper as a raw material according to claim 4, wherein 7 to 34 parts by weight of an inorganic lightweight aggregate is added before kneading. 6. A water-soluble cellulose ester is added before kneading.
The method for producing a recycled board using synthetic resin wallpaper as a raw material according to claim 4 or 5, characterized in that about 3 parts by weight is added.