JP3187105B2 - Recycled paper molded article having buffering property 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 a molded article used as a cushioning material, a heat insulating material, a sound absorbing material, and the like, and a method of manufacturing the same.
Particularly, the present invention relates to a molded article manufactured from waste paper.

[0002]

2. Description of the Related Art When the contents of a package are ceramics or electric appliances, a cushioning material is provided in a space between the packaging container and the contents in order to prevent the contents from being broken or damaged by an impact during transportation. It is common practice to fill Styrofoam molded products are widely used as cushioning materials.

On the other hand, used paper is collected by a collection company and used as a raw material for recycled paper, or is discarded together with general garbage and landfilled or incinerated. Paper used as confidential documents is shredded by a shredder and discarded, but the shredded paper will be disturbed in the melting process during the production process of recycled paper, so it will be refused to be picked up by the paper manufacturer It is common practice that they must be landfilled or incinerated. The same is true for copy paper. Paper having carbon printed on the back side cannot be used as a raw material for recycled paper and must be discarded.

[0004]

The styrofoam cushioning material is very excellent in terms of cushioning function and workability at the time of packaging, but in terms of effective use of petroleum resources and treatment after use. There is a problem. In other words, consuming petroleum, which has various uses and is a limited resource, as a mere buffer is a waste of resources, and styrofoam does not have microbial degradability and has a large amount of combustion heat, so it can be landfilled. Even incineration can cause environmental destruction, and there is no effective use in ordinary households.

On the other hand, the amount of paper that is shredded and discarded is rapidly increasing with the spread of office electronic devices, and the amount of heat-sensitive paper and copy paper is also increasing. It is being disposed of, and the destruction of nature by landfill and the increase of air pollution and heat pollution by incineration are increasing.

The present invention aims to recycle waste paper that has been landfilled or incinerated, to prevent natural destruction and environmental pollution due to the above-mentioned causes, and to further reduce the consumption of petroleum even slightly. This was done as an issue.

[0007]

The present invention has solved the above-mentioned problems by obtaining a molded article which can be used in place of a conventional styrofoam molded article by using waste paper as a raw material. The molded article of waste paper of the present invention is obtained by mixing crushed waste paper and an adhesive , developing it into a flat plate to a certain thickness , compressing it into a sheet, drying it, and cutting it into a block. After breaking or breaking, the adhesive is mixed, poured into a mold, and a gap 3 is formed between the lump or granular material 1 obtained by cutting or breaking.
It is obtained by drying in the state having.

[0008] Shredded waste paper can be added when mixing the ground waste paper with the adhesive. As an adhesive,
An inexpensive and natural biodegradable adhesive is preferred. Natural adhesives include plant, animal and natural resin adhesives. Specifically, pine cones, low molecular adhesives such as polyterpenes and waxes, natural rubber, starch, modified starch (CMC), gum arabic, etc. Polysaccharides or proteins such as casein, gelatin, glue and the like.

[0009]

The molded article of the present invention is obtained by joining crushed waste paper into a block shape with an adhesive, and joining the formed block-like lump 1 with an adhesive 2 to form a molded article 4. Voids 3 are formed between the lumps 1 and the porosity is high and the cushioning properties are excellent. In addition, since the adhesive is dried in a sheet state and in a state having many voids 3 in the inside at the time of molding, the adhesive is dried with a large surface area, so that the drying is quick and the productivity is high. it can. Further, shredded waste paper can be added to the crushed waste paper, and the waste paper that has been conventionally discarded can be effectively used.

[0010] The molded article of the present invention is used by filling the space between the packaging container and the contents in the same manner as the conventional molded article of styrofoam. After being used as a cushioning material, a heat insulating material or a sound absorbing material, it can be buried in the soil as it is or by crushing.

Generally, paper is a putrefactive organic substance mainly composed of plant fiber and white clay. Therefore, when buried in the soil, it is decomposed by microorganisms in the soil to produce humus, and has a soil improvement effect and a fertilizer effect. Compost. The molded article of the present invention
The waste paper used as the raw material is crushed, so it has good water retention,
The surface area per unit weight is so large that it is rapidly degraded by microorganisms. In addition, if a natural material is used as the adhesive, there is no possibility that the microbial decomposability of the waste paper is hindered.

As described above, according to the present invention, effective use of waste paper is achieved, consumption of styrofoam as a cushioning material for packaging is reduced, and the amount of styrofoam and waste paper to be landfilled or incinerated is reduced. Disposal in a direction to enrich nature becomes possible.

[0013]

FIG. 1 is a block diagram showing one embodiment of a method for manufacturing a molded article according to the present invention. The used paper collected by a collecting company is pulverized, and a powdery adhesive (CMC) and shredded used paper are added thereto and mixed, developed into a flat plate shape to a certain thickness, and sprayed with water. Next, the whole is compressed and formed into a sheet, and then dried. The reason for using a powdery adhesive in this way is that waste paper has a large water absorption and it takes time to dry once it is absorbed, so when water is needed, that is, water is sprayed at the time of bonding to limit the amount of water absorption, Drying was completed in a short time. Forming into a thinner sheet increases the surface area and promotes drying. Since the shredded waste paper is mixed, the waste paper shredded by the shredder that has been conventionally discarded can be reused.

The sheet material produced by the above method is cut or broken into a block shape, an aqueous CMC solution is added, mixed, poured into a mold, compressed appropriately, dried, and then released. Since this molding process joins the block-shaped lump 1 with the adhesive 2, the void 3 is formed between the lump 1 and the porosity is high, so that the adhesive can be dried quickly. it can.

The molded article 4 produced by the above method is used in a manner similar to that of a conventional styrofoam molded article by filling the space between the packaging container and the contents. The molded article of the present invention can be formed into a shape corresponding to the shape of the space between the packaging container and the contents, similarly to the conventional polystyrene foam. Moreover, after being used as a cushioning material, a heat insulating material or a sound absorbing material, it can be buried in the soil as it is or by crushing.

[0016]

The molded article of the present invention can be used as a cushioning material for packing, a heat insulating agent, a sound absorbing agent, etc. instead of the conventional styrofoam, so that the resources can be effectively used and the consumption of petroleum resources can be reduced. Can be done. In addition, since the adhesive used for molding can be dried quickly, productivity is good. Furthermore,
Since it has microbial degradability, environmental pollution after disposal can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a manufacturing method of the present invention.

FIG. 2 is an enlarged view showing a partial structure of a molded article of the present invention.

FIG. 3 is a perspective view showing an example of the shape of a molded article of the present invention.

[Explanation of symbols]

 1 block-shaped mass 2 adhesive 3 void 4 molded product

Claims (2)

(57) [Claims] 1. A flat plate obtained by mixing an adhesive with crushed waste paper
The block-like lump or granular material (1) obtained by compressing this , forming it into a sheet, drying and then cutting or breaking it is used to form a gap (3) between them. In a state having, it is bonded with an adhesive (2) and molded into a predetermined shape,
Recovered paper molding with cushioning properties. 2. A flat plate obtained by mixing an adhesive with crushed waste paper.
It is developed to a certain thickness, compressed , formed into a sheet, dried, and the resulting sheet-like molded product is cut or broken into blocks, mixed with an adhesive, and poured into a mold. A method for producing a used paper molded article having a buffering property, wherein drying is performed in a state in which a gap is present between the block-shaped cut or broken pieces.