JPH05178370A - Shock absorbing molding of used paper and production thereof - Google Patents

Abstract

PURPOSE:To contrive the recycle of used papers to produce the moldings for use as cushioning, heat insulating and acoustic materials instead of being used in land reclamation or incinerated for disposal in order to prevent natural destruction or environmental pollution and reduce the amount of oil consumption. CONSTITUTION:Ground used papers and an adhesive agent 2 are mixed together, the resulting mixture is compressed into the form of a sheet which is then dried, such a sheet is cut or crushed into the pieces as in the form of a block 1, an adhesive agent 2 is again added to such pieces and the resulting mixture is introduced into a mold and dried to obtain the molding of a desired shape. The ground used papers and the adhesive agent 2 may be mixed together, while shredded used papers are being added thereto. Concerning the adhesive agent 2, the use of an inexpensive, microbiologically decomposable natural adhesive agent is preferred.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product used as a cushioning material, heat insulating material, sound absorbing material, etc.
In particular, the present invention relates to a molded product manufactured from waste paper.

[0002]

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

On the other hand, used paper is collected by a collecting company and used as a raw material for recycled paper, or is discarded together with general waste for landfilling or incineration. Paper used as confidential documents is shredded with a shredder and discarded, but shredded paper interferes with the melting process during the manufacturing process of recycled paper and is rejected by paper manufacturers. It is normal for them to be landfilled or incinerated at present. This also applies to copying paper, and the paper with 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 the cushioning function and workability at the time of packaging, but it is necessary to effectively use petroleum resources and to treat it after use. I have a problem. In other words, it is a waste of resources to consume petroleum, which has various uses and limited resources, as a mere cushioning material, and since Styrofoam does not have biodegradability and has a large combustion heat amount, landfill and Even if incinerated, it causes environmental damage and is not effectively used in ordinary households.

On the other hand, the number of papers shredded and discarded is increasing rapidly with the spread of office electronic devices, and thermal papers and copy papers are also increasing. Therefore, a large amount of papers are not recycled. It is abandoned, and it is increasing the amount of air pollution and heat pollution caused by the destruction of nature by landfilling garbage and incineration.

[0006] The present invention aims to reuse the waste paper currently being 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. It was done as an issue.

[0007]

The present invention solves the above-mentioned problems by obtaining a molded product which can be used in place of a conventional Styrofoam molded product from waste paper as a raw material. The waste paper molded product of the present invention is obtained by mixing crushed waste paper and an adhesive, compressing them into a sheet and then drying them, cutting them into blocks or breaking them, mixing the adhesive, and putting them into a mold to dry. Obtained by

Shredded waste paper can be added when mixing the crushed waste paper and the adhesive. As an adhesive,
A natural adhesive that is inexpensive and has biodegradability is suitable. Natural adhesives include plant, animal and natural resin adhesives. Specifically, pineapple, low molecular weight adhesives such as polyterpenes and waxes, natural rubber, starch, modified starch (CMC), gum arabic, etc. Polysaccharides or protein such as casein, gelatin and glue.

[0009]

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

The molded product 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 product of Styrofoam. After being used as a cushioning material, a heat insulating material or a sound absorbing material, it can be buried as it is or after being crushed.

Generally, paper is a putrefactive organic substance mainly composed of plant fibers and clay, so that when it is buried in the soil, it is decomposed by microorganisms in the soil to produce humus, which has a soil improving effect and a fertilizer effect. It becomes compost. The molded article of this invention is
Since the used paper, which is the raw material, is crushed, it has good water retention,
The surface area per unit weight is so large that it is rapidly degraded by microorganisms. Also, if a natural material is used as the adhesive, there is no risk of disturbing the microbial degradability of the waste paper.

As described above, according to the present invention, it is possible to effectively use waste paper, reduce the consumption of Styrofoam as a cushioning material for packaging, and reduce the amount of Styrofoam and waste paper to be landfilled or incinerated. It becomes possible to dispose of waste in the direction of enriching nature.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a method for manufacturing a molded product according to the present invention. The used paper collected by a collector is crushed, and the powdered adhesive (CMC) and shredded used paper are added to and mixed with each other, and this is spread in a flat plate shape to a certain thickness and sprayed with water. Next, the whole is compressed to form a sheet and then dried. In this way, the powdered adhesive is used because waste paper has a large water absorbency and it takes time to dry once it is absorbed by water. The drying was completed in a short time. By forming into a thinner sheet, the surface area is increased and the drying is promoted. Since the shredded waste paper is mixed, it is possible to reuse the shredded waste paper that was previously discarded.

The sheet material produced by the above method is cut or fractured to form a block shape, an aqueous CMC solution is added and mixed, and the mixture is put into a mold, appropriately compressed and dried, and then demolded. In this molding process, since the block-shaped lumps 1 are bonded to each other with the adhesive 2, the voids 3 are formed between the lumps 1 and the void ratio is high, so that the adhesive can be quickly dried. it can.

The molded product 4 produced by the above method is used by filling the space between the packaging container and the contents in the same manner as the conventional molded product of Styrofoam. Like the conventional Styrofoam, the molded article of the present invention can be shaped to match the shape of the space between the packaging container and the contents. 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 after being crushed.

[0016]

EFFECTS OF THE INVENTION The molded article of the present invention can be used as a cushioning material for packaging, a heat insulating agent, a sound absorbing agent, etc. in place of the conventional Styrofoam, and can effectively utilize resources and reduce the consumption of petroleum resources. Can be made Further, since the adhesive used during molding can be dried quickly, the productivity is good. Furthermore,
Since it is biodegradable, environmental pollution after disposal can be reduced.

[Brief description of 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 product of the present invention.

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

[Explanation of symbols]

 1 Block-shaped mass 2 Adhesive 3 Void 4 Molded product

Claims (2)

[Claims] 1. A block-shaped lump (1) or granular material obtained by binding crushed waste paper with an adhesive to form a sheet, drying, and then cutting or rupturing, and binding with an adhesive (2) A used paper molded product with cushioning properties that is formed into a specified shape. 2. A crushed waste paper and an adhesive are mixed, molded into a sheet and dried, and the obtained sheet-shaped molded product is cut or broken into blocks, and then the adhesive is mixed and put into a mold. A method for producing a used paper molded article having a cushioning property, which comprises: