JP3156127B2 - Artificial wood made of waste paper and styrene resin and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to artificial wood mainly composed of used paper, and more particularly to an artificial wood made of used paper and styrene resin, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as artificial wood using waste paper, first, waste paper is pulverized and the obtained powdery waste paper 3 is obtained.
The resin was mixed at a ratio of 70 to 0, and the mixture was heated, melted, and solidified. Artificial wood manufactured by such a conventional method has a high resin content due to a large proportion of resin to waste paper, and therefore has a higher resin property, and therefore is heavier than natural wood, and can be used for nailing, cutting, and the like. There was a drawback that workability was significantly worse than wood.

[0003] Further, since the mixing ratio of the used paper material is small, the recycling of the used paper material is not sufficient, and the price of the final product is low because a large amount of resin is used, which is more expensive than the used paper material. It had to be expensive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and has the same rigidity and workability as wood even though it is lighter in weight than wood. It is an object of the present invention to provide an artificial wood made of a recycled paper material and a styrene resin, which can be manufactured at a low cost and can promote the recycling of the recycled paper material because of a high use ratio of the recycled paper material, and a method for producing the same.

[0005]

According to the present invention, in order to achieve the above object, waste paper and water are charged into a waste paper shredder and stirred, and the waste paper is shredded into waste pulp. The styrene foam or styrene resin is dissolved in a methylene chloride-based organic solvent to form a solution, and the used paper pulp material is put into the solution and stirred, and the stirred used paper pulp material is stored in a mold having a predetermined shape, and pressed. A waste paper material formed by drying a mixture of waste paper pulp material and styrene resin from which the moisture and the methylene chloride organic solvent component and the like have been removed. And artificial wood made of styrene resin.

The mixing ratio (weight) of the styrene foam or styrene resin component to the waste paper pulp material is 3%.
The range is from 0:70 to 40:60.

Further, waste paper and water are put into a waste paper shredder and stirred, and the waste paper is shredded into waste pulp, and styrene foam or a styrene resin is dissolved in a methylene chloride-based organic solvent. The waste paper pulp material is put into the obtained solution and stirred, the stirred waste paper pulp material is stored in a mold having a predetermined shape, and pressed to remove moisture and the methylene chloride-based organic solvent component. A method for producing an artificial wood made of a used paper material and a styrene resin, wherein the mixture is formed by drying a mixture of a used paper pulp material from which a methylene chloride-based organic solvent and the like have been removed and a styrene resin.

The mixing ratio (weight) of the styrene foam or styrene resin component to the waste paper pulp material is 3%.
0:70 to 40:60,
The mixing ratio (by weight) of the methylene chloride-based organic solvent and the styrene foam or styrene resin is 70:30.

[0009] Further, the waste paper pulp material put into the styrene foam or styrene resin solution dissolved in the methylene chloride-based organic solvent is dehydrated in advance so as to have a water content of about 35%. Dissolution of the foamed styrene or styrene resin with the methylene chloride-based organic solvent is characterized in that it is carried out in a tank body filled with water. It is characterized in that a volume of water is charged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram illustrating a state in which waste paper pulp 3 is put into a solution in which styrene foam or a styrene resin (hereinafter, simply referred to as a styrene resin) is dissolved in a methylene chloride-based organic solvent, and is stirred by a mixer 4. is there. FIG. 2 illustrates a state in which the agitated waste paper pulp is stored in a mold 5 and pressed by a press machine 6 to squeeze (remove) water and methylene chloride-based organic solvent components of the waste paper pulp material. FIG. This will be described below.

In the artificial wood and the method for producing the same according to the present invention, unlike the conventional example, first, the used paper material is put into a used paper shredder (commonly called pulper: not shown) containing water and stirred. Shred. In this way, the used paper material is made into cotton-like used paper pulp.

Next, the flocculent waste paper pulp is dewatered by a dehydrator (not shown) so that the water content becomes about 35%. This dehydration step is not always necessary, and the process may proceed to the next step without dehydration.

Separately from the above steps, the styrene resin is dissolved with a methylene chloride-based organic solvent. As the methylene chloride-based organic solvent in the present invention, methylene chloride, trichloroethylene, chloroform, carbon tetrachloride, tetrachloroethylene (verchloroethylene), and the like, and a mixture thereof are used. Each has a specific gravity of 1.3 to 1.
6. It has a boiling point of about 40 ° to 120 ° and is easy to handle.

The methylene chloride-based organic solvent and the styrene resin are charged into the tank 1, water is further charged, and the mixture is sufficiently stirred by the mixer 4 to dissolve the styrene resin. The mixing ratio (weight) of the methylene chloride-based organic solvent and the styrene resin component is set to about 70:30. The water to be supplied is not limited to purified water, but well water or industrial water can also be used. Since the specific gravity of water is approximately 1 and the specific gravity of the solvent is about 1.3 to 1.6 as described above, an aqueous layer 5 is formed on the solution 2 as shown in FIG. This water layer 5 seals the surface of the solvent component in the tank body 1 and prevents its emission into the atmosphere. By this action, it is possible to eliminate the need for equipment such as a closed container or a closed building. , Choosing the location of the tank body 1, without adversely affecting the environment,
Work can be done safely.

Next, the dewatered waste paper pulp 3 is put into the solution stirred by the mixer 4 and sufficiently stirred by the mixer 4. In this embodiment, the waste paper pulp 3 is directly charged into the tank body 1 for dissolving the resin component by the solvent, and a tank body for dissolving the resin and a tank body for charging the waste paper pulp to the dissolved solution. Of course, it may be made to be different.

The mixing ratio (weight) of the styrene resin and the waste paper pulp is in the range of about 30:70 to 40:60. The ratio of the styrene resin is about 30 which is almost the limit. When the ratio is 30 or less, the role of the resin as a binder for connecting the fibers of the waste paper pulp is weakened, and a rigid product is not obtained. Conversely, when the resin content in the wastepaper pulp increases, the properties as a resin become stronger and the properties as "wood" are lost. In consideration of such points, the mixing ratio (weight) of the resin and the wastepaper pulp is in the range of about 30:70 to 40:60.

The resin content and the waste paper pulp having the above ratios are sufficiently and repeatedly stirred in the tank 1 for a predetermined time.
As a result, the water contained in the fine pores of each fibrous material of the used paper pulp is separated by the solvent and replaces the resin component. The resin serves as a binder connecting the fibers, and the fibers are connected and integrated by the resin. As described above, the styrene resin dissolved by the methylene chloride-based organic solvent is strongly fused in a fiber molecular structure in each fiber of the waste paper pulp, and is converted into wood.

In this embodiment, the used waste paper pulp is previously dehydrated so as to have a water content of 35%, but the water contained in the waste paper pulp is separated by the solvent as described above. For this reason, it may be supplied as it is without dewatering.

The kneaded body 6 of the sufficiently stirred styrene resin and waste paper pulp is stored in a mold 7 having a predetermined shape.
It is press-formed by a press machine 8. With this press,
The organic solvent and moisture are squeezed out of the styrene resin and the waste paper pulp and collected in the tank 9. Reference numeral 10 of the tank 9 is a recovered organic solvent, which is used again as a solvent. Water 11 having a low specific gravity is stored in the upper layer of the solvent 10.

The pressed and formed kneaded body 6 is heated and dried in a heating furnace (not shown) to remove the remaining organic solvent and moisture, thereby completing artificial wood. Pressing by the mold 7 and the press machine 8 may be performed in a heating furnace, and after pressing and forming, heating and drying may be performed directly.

The artificial wood commercialized through the above process has the same rigidity as the original wood, but has a light weight of one third and its workability is the same as that of the original wood. ,
For example, nailing, canning, sawing, etc. are possible as well as natural wood. In addition, it has an excellent characteristic that coloring properties are good.

As another embodiment, when polystyrene is mixed at a predetermined ratio as the resin component, the finished artificial wood can have elasticity.

[0023]

As described above, according to the artificial wood made of waste paper and styrene resin and the method for producing the same according to the present invention, it is possible to promote the recycling of waste paper because the usage ratio of waste paper is high. Provided is an artificial wood made of waste paper and styrene resin, which has the same rigidity and processability as wood even though it is lighter in weight than wood, and can be manufactured at a low cost, and a method of manufacturing the same. can do. In addition, there is no adverse effect on the environment due to volatilization of the organic solvent, and special facilities such as a closed container and a closed building are not required, and excellent effects such as safe operation can be obtained.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram illustrating a state in which a used paper pulp 3 put in a solution in which styrene foam or a styrene resin is dissolved in a methylene chloride-based organic solvent is stirred by a mixer 4.

FIG. 2 is a conceptual view for explaining a state in which agitated used paper pulp is stored in a mold 7 and pressed by a press machine 8 to squeeze out water and methylene chloride-based organic solvent content of the used paper pulp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank body 2 Dissolution liquid 3 Waste paper pulp 4 Mixer 5 Water layer 6 Kneaded body 7 Mold 8 Press machine 9 Tank body 10 Solvent 11 Water layer

Claims (8)

(57) [Claims] A waste paper material and water are put into a waste paper cutting machine and agitated, and the waste paper material is cut into a waste paper pulp material. The waste paper pulp material is put into the solution and stirred, and the stirred waste paper pulp material is stored in a mold having a predetermined shape,
A waste paper formed by pressing to remove moisture and the methylene chloride-based organic solvent component, and drying a mixture of the waste paper pulp material and the styrene resin from which the moisture and the methylene chloride-based organic solvent component have been removed; Artificial wood made of wood and styrene resin. 2. The mixing ratio (weight) of the expanded polystyrene or styrene resin to the waste paper pulp material is 30: 7.
The artificial wood made of waste paper and styrene resin according to claim 1, wherein the ratio is in the range of 0 to 40:60. 3. A waste paper material and water are put into a waste paper cutting machine and stirred, and the waste paper material is cut into a waste paper pulp material, and styrene foam or a styrene resin is dissolved in a methylene chloride-based organic solvent. The waste paper pulp material is put into the solution and stirred, and the stirred waste paper pulp material is stored in a mold having a predetermined shape,
Pressing to remove water and the methylene chloride-based organic solvent component, and drying and forming a mixture of the waste paper pulp material and the styrene resin from which the moisture and the methylene chloride-based organic solvent component have been removed. A method for producing artificial wood made of waste paper and styrene resin. 4. The mixing ratio (weight) of the expanded polystyrene or styrene resin to the waste paper pulp material is 30: 7.
4. The method of claim 3, wherein the ratio is in the range of 0 to 40:60. 5. The mixing ratio (weight) of the methylene chloride-based organic solvent to styrene foam or styrene resin is 7%.
The method for producing an artificial wood made of waste paper and styrene resin according to claim 3, wherein the ratio is 0:30. 6. The styrene foam or styrene resin
Waste paper pulp material to be introduced into the solution obtained by dissolving in methylene chloride-based organic solvents, according to claim 3, wherein the water content is preliminarily dehydrated so as to be substantially 35% A method for producing artificial wood made of waste paper and styrene resin. 7. The artificial wood made of waste paper and styrene resin according to claim 3, wherein the dissolving of the styrene foam or the styrene resin with the methylene chloride-based organic solvent is performed in a tank holding water. Production method. 8. The artificial wood made of waste paper and styrene resin according to claim 3, wherein a predetermined volume of water is introduced before stirring the waste paper pulp put into the solution. Manufacturing method.