JPH06247471A - Production of packing material for package - Google Patents

Abstract

PURPOSE:To obtain a packing material for package which is biodegradable, does not produce a high calorie and consequent damage to combustion furnace and does not generate harmful gases at the time of combustion leading to the solution of environmental and sanitary problem areas and is inexpensive to produce by an effective use of used papers as the material, light in weight and producible on a large scale. CONSTITUTION:The paper pipe 1 having a diameter of at most 10m/m is cut into short pieces, which are then shaped into hollow paper pieces in predetermined forms such as cylindrical paper piece 4 and pillow-like piece 2 or tetrahedron piece 3b with small triangular faces made by pressing together each end of the cylindrical paper piece. A large number of the hollow paper pieces having the outer surfaces coated with adhesive agent are placed into a mold to be pressed and solified into a desired shape.

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 packing material for packaging made of a biodegradable material which can be decomposed by microorganisms.

[0002]

2. Description of the Related Art Conventionally, a large amount of foamed plastic, for example, foamed polystyrene (hereinafter referred to as EPS), foamed polyurethane (hereinafter referred to as EPU), etc., should be held as a packing material for packaging for holding and holding articles. It is manufactured by using a mold in a predetermined shape corresponding to an article.

[0003]

The foamed plastics used in the past are not biodegradable, so that the waste will not rot even if discarded after use, and will not burn high calories when burned. There are various problems in terms of environmental hygiene, such as the generation of combustion gas in the combustion furnace and the generation of further harmful black combustion gas. Especially in the case of packaging for export, landing is refused unless the recipient country is biodegradable packaging, so there is a great deal of demand for suitable packaging materials.

The present invention has been made in view of the above points, and has various drawbacks of the conventional packing material for packaging made of foamed plastic, that is, it has no biodegradability and generates high calories during combustion. It can solve all the environmental hygiene problems such as burning the combustion furnace and generating harmful gas during combustion, and can effectively use the waste paper as a raw material, and it is cheap, lightweight and can be mass-produced. It is an object of the present invention to provide a method for manufacturing a packing packing material.

[0005]

In order to achieve the above object, in the method of manufacturing a packing material for packaging of the present invention,
A paper tube with a small diameter of at least 10 m / m or less is used, and this is cut into short lengths to form a paper hollow small piece of a predetermined shape from the raw material of the paper tube, and then an adhesive is applied to the outer surface of the hollow small piece. While being applied, a large number of them are put into a molding die suitable for the intended use, and are pressed and solidified into a desired shape.

When a flexible paper tube made of cardboard or the like is used as a raw material for the hollow paper piece, the paper tube short piece cut into a short length can be used as it is.

When a paper tube having no stiffness as a raw material (for example, a paper tube using waste paper) is used as the paper hollow small piece, a predetermined small-diameter paper tube is pressed at a constant pitch in the same direction, and is pressed by a press. It is preferable that both ends of the formed paper tube short piece portion are crushed and fixed with an adhesive and cut at the same time to form a pillow-shaped small piece in which both end portions are joined and air is enclosed inside.

Further, when a flat paper tube is used as the raw material as the hollow paper piece as the raw material, the paper tube having a predetermined small diameter is pressed at a constant pitch every other direction so that the directions are crossed, and the same as the previous section. It is effective to cut the same at the same time as bonding, and to form a small triangular tetrahedron (for example, a tetra pack shape at the time of release) in which both ends are joined and air is enclosed inside.

It is desirable to use a biodegradable adhesive that can be decomposed by microorganisms as the adhesive used for producing the paper tube and the adhesive applied to the outer surface of the hollow paper piece.

The molding die is made of a material that easily transmits electromagnetic waves such as high frequency and microwaves or ultrasonic waves, and a hollow hollow piece of paper is put into the molding die and press-molded. The adhesive applied to the outer surface of the hollow paper piece can be dried and solidified by electromagnetic waves such as high-frequency waves and microwaves or ultrasonic waves from the outside of the mold.

Further, a hot melt type adhesive can be used as the adhesive applied to the outer surface of the hollow paper piece. In addition, as a usage form of this hot-melt adhesive, the adhesive is applied to the outer surface of a paper-made hollow piece, then rapidly cooled and stored, and reheated immediately before being put into a molding die to obtain a hot-melt adhesive. It is effective to exert the adhesive force of (1), and to rapidly solidify the adhesive by putting it in a mold and then solidifying the adhesive to integrate the hollow paper pieces.

[0012]

[Function] As described above, a small-diameter paper tube having a diameter of at least 10 m / m is cut into a short length to form a hollow paper piece having a predetermined shape from the raw material of the paper tube, and then bonded to the outer surface of the hollow piece. When a large number of the coated products are placed in a mold suitable for the application and pressed and solidified into a desired shape, the hollow paper pieces are joined together via an adhesive and agglomerate to form packing packing. Although the material is formed, the hollow part of each paper hollow piece allows a large space to be formed in the packing material and keeps the weight lightweight, and the paper piece hollow piece naturally decays even after disposal, Further, since it does not generate high calorie or harmful gas at the time of combustion, it is extremely advantageous in environmental hygiene. When a biodegradable adhesive is used as the adhesive for manufacturing the paper tube and the adhesive applied to the outer surface of the hollow paper piece, all of the above environmental hygiene problems can be solved. Furthermore, not only new paper but also used paper can be effectively used as a raw material, and since it is pressed and molded in the mold, a small packing paper tube with a diameter of 10 m / m or less is used for large packing materials. For ordinary packing materials, it is possible to use hollow paper pieces with a small diameter paper tube with a diameter of 5 m / m or less, and to mold them into the same shape as conventional foamed plastic. It is possible to manufacture a packing material that can be produced.

In the production of the above-mentioned paper hollow small pieces, when a flexible (compressive strength) paper tube made of cardboard or the like is used as a raw material, the paper tube short piece obtained by cutting the paper tube into a short length is used. Although it can be used, when manufacturing hollow paper small pieces from a rigid paper tube using waste paper etc., pillow-shaped small pieces or small triangular tetrahedrons in which both ends of the paper tube short piece are crushed and fixed with adhesive This makes it possible to maintain a space inside and to have strength against pressure, and even if an adhesive is applied and pressure molding is performed in a mold, the space will not be lost and become heavy. It is possible to achieve a specific gravity equivalent to the light weight of 0.02 or the specific gravity of EPU.

Further, when manufacturing the above-mentioned molding die, if the material is made of a material that easily transmits and propagates electromagnetic waves such as high-frequency waves and microwaves or ultrasonic waves, it is put into the molding die and pressed and aggregated. The adhesive that is present between the hollow paper pieces is a high-frequency wave that passes through the mold without heating.
It can be easily and efficiently heated and dried by electromagnetic waves such as microwaves or ultrasonic waves in a short time.

Further, when a hot-melt type adhesive is used as an adhesive to be applied to the outer surface of a hollow paper piece, the hot-melt type adhesive is characterized by melting when heated and hardening at room temperature. Coat the outer surface of the small piece,
The adhesive that is in a molten state after application is kept as it is, and what is stored after being rapidly cooled after application is reheated and put into a molding die and pressed to rapidly solidify to solidify the hollow paper pieces. In addition, the product can be dried and the drying equipment is not required.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a packing material for packaging according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a process diagram in the case of manufacturing a packing material for packaging by using waste paper as a raw material. Used raw paper, which is separated and collected from homes and workplaces, is cut into strips with a cutting machine. Next, the cut strip-shaped paper material is sent to a predetermined coating roller device to coat the adhesive with the surface, coated with starch paste that has biodegradability as an adhesive, and then printed on the strip-shaped paper material surface. After coating with starch paste, apply it to the specified paper tube making machine and have a diameter of 10 m / m or less, preferably 5 m / m.
The following paper tubes are manufactured. In order to partially crimp this paper tube made of waste paper that is not strong and cut the crimping part at the same time, a cutter blade is provided between the narrow crimping surfaces every time it is sent at a constant pitch with a predetermined crimping cutting machine. Using a tool, crimp and cut at the same time to make hollow paper pieces with air enclosed inside.

When the paper tube 1 is pressure-bonded and cut, the paper tube 1 sent at a constant pitch is pressed in the same direction to be pressure-bonded and cut (in FIG. 2, the pressure-bonding cut portion in the vertical direction of the paper tube 1 is indicated by an arrow). ), The pillow-shaped small piece 2 with air enclosed therein is formed. The pillow-shaped small piece 2 has a side view as shown in FIG. 3 and a plan view as shown in FIG.
Both end portions 2a, 2a are joined in parallel in a state where the central portion is inflated.

Further, at the time of pressure-bonding and cutting, presses for pressure-bonding and cutting are arranged on the paper tube 1 sent at a constant pitch in a vertical position and a horizontal direction at fixed positions across the paper path of the paper tube. , When the paper tube is moved and stopped alternately, press every other and press and cut in a direction orthogonal to each other (Fig. 5 shows the pressure and cutting parts of the paper tube 1 in the vertical direction and the horizontal direction). Is indicated by an arrow.),
A small triangular tetrahedron 3 (tetrapack-like at the time of launch) is formed with air sealed inside. As shown in the perspective view of FIG. 6, the small triangular tetrahedron 3 has both end portions.
3a and 3a are joined to each other at right angles, and each small triangular face 3b and 3b
---- is almost an equilateral triangle due to the paper tube diameter and feed pitch. This makes the manufacturing process a little more complicated than the pillow-shaped piece, but as a hollow piece made of paper, the size of each ridge is uniform and the directionality against pressing can be given uniformly, and it is also excellent in strength. When a large number of pieces are put into a mold, the packing material can be advantageously agglomerated to form the packing material.

The paper hollow small piece formed as described above is dried to stabilize its shape, and then put into a drum of a known cylindrical rocking coater (not shown) and shaken while rotating the drum. After the starch paste, which is a biodegradable adhesive, is sprayed while moving, it is blown into a predetermined polypropylene molding die to be integrated, and then pressed and solidified into a desired shape by press molding. In this case, by passing the molding die through a high-frequency drying furnace, the starch glue dissolved in water as the adhesive is heated and efficiently dried in a short time of several seconds to several tens of seconds. Since polypropylene has a good mold release property, the starch paste does not adhere to the mold, so that the product can be easily taken out. In this way, it is possible to obtain a lightweight and robust predetermined packing material for packaging (specific gravity 0.2 to 0.5) having a large space due to a large number of hollow portions of the paper hollow small pieces that have been charged.

In the above embodiment, the hollow small piece of paper which should be agglomerated in the molding die is a pillow small triangle tetrahedron in which both ends of the short piece of the paper tube are joined and air is enclosed. However, when using a rigid (compressive strength) paper tube made of cardboard that is used for both new and used paper as a raw material, the short paper tube piece 4 cut into a short length (see FIG. 7)
Can be used as it is as a small piece of paper and coated with an adhesive on the outer surface and blow-molded into a molding die to obtain a packing packing material molded product. In this case, the specific gravity is slightly higher than that of the embodiment, but there is an advantage that the manufacturing is simple.

Further, regarding the paper-made hollow small pieces forming the packing material for packing, in the above-mentioned embodiment, a pillow-shaped small piece in which air is enclosed, or a small triangular tetrahedron in which each side of each small triangle is a substantially equilateral triangle, Also, I explained about the thick and thin paper tube short piece, but the shape of the paper hollow small piece is arbitrary, such as each side of the small triangle tetrahedron is a slender triangle with the cross direction of the paper tube pressing direction. It is possible to obtain a molded packing material for packaging by using it, and it is of course possible to use it as a molding die for a molding die unless high frequency drying is used for drying.

Furthermore, in the above embodiment, starch glue was used as the adhesive applied to the outer surface of the hollow paper small piece, but a hot-melt type adhesive can be used instead of the adhesive. This adhesive is melted by heating and applied as a fluid to hollow paper small pieces, then put into a mold, pressed and rapidly cooled to easily solidify to obtain a product in which the hollow paper small pieces are integrated. . It is also possible to apply a hot-melt type adhesive to a hollow paper piece, quench it, store it, and use it if necessary. In this case, the hot-melt adhesive-coated paper hollow piece is reheated immediately before being put into the mold to give an adhesive force, which is put into the mold and pressed to rapidly cool to solidify the adhesive. A hollow packing made of paper can be integrated to obtain a packing material for packaging as a product. In this way, the manufacturing equipment can be simplified because no drying equipment is required. As described above, various modifications can be added to the manufacturing method within the scope of the present invention.

[0024]

According to the method of manufacturing a packing packing material of the present invention as set forth in claim 1, a small-diameter paper tube has a short length when manufacturing a packing packing material for holding and packing articles. The hollow small paper pieces cut into pieces with a predetermined shape were put into multiple molds with the adhesive applied to the outer surface and pressed to solidify them into the desired shape. Can be molded into a packing material, and a large space can be held by the internal space of a large number of hollow paper pieces that are coagulated and solidified into a molded packing material. It can be manufactured. In addition, not only new paper can be used as a raw material, but also recycled paper can be effectively used. Furthermore, since paper is used as a raw material, even if it is discarded after use, it naturally decomposes and decomposes by microorganisms. Like the packing material for packaging, the foamed plastic does not generate high calories during combustion and does not damage the combustion furnace, nor does it generate a black harmful gas during combustion, which is extremely advantageous for environmental hygiene. .

According to the second aspect of the present invention, a hollow paper piece having a compressive strength can be easily formed by using a thick cardboard having elasticity, and the manufacturing of the packing material for packaging can be simplified. .

According to the third aspect of the present invention, even when the raw paper is a solid waste paper or the like, the both ends of the hollow hollow piece of paper forming the packing material are joined to the inside of the small piece. By providing a space in which air is enclosed, it is possible to give strength against pressing, and even if it is pressed in the mold, there is no space and it does not become heavy, and a lightweight packaging with a specific gravity of 0.02. The packing material for use can be easily manufactured.

According to the invention as set forth in claim 4, even in the case of using a wasteless waste paper or the like as in the preceding paragraph, by using the small triangular tetrahedron as the hollow paper piece constituting the packing material, It is possible to make it excellent in strength, especially when making every other press direction to the paper tube at a right angle, since an equilateral triangle tetrahedron can be used,
The compressive strength can be evenly provided in each direction, and the packing material having excellent strength can be agglomerated advantageously when a large number are put into a mold, and a packing material having excellent strength can be manufactured.

According to the fifth aspect of the present invention, an adhesive agent for a paper tube having a small diameter, which is a raw material for manufacturing a packing material, or an adhesive agent applied to the outer surface of a hollow paper piece for coagulation and solidification in a mold. By using a biodegradable agent, it is possible to completely prevent generation of harmful gas during combustion, so that all environmental hygiene problems can be solved.

According to the sixth aspect of the invention, the molding die is made of a material that easily transmits and propagates electromagnetic waves such as high-frequency waves and microwaves, or ultrasonic waves, and the paper hollow small pieces put into the molding die are press-molded. After that, electromagnetic waves such as high-frequency waves and microwaves or ultrasonic waves from the outside of the molding die are used to efficiently pass the adhesive between the hollow paper-made small pieces press-molded in the molding die without heating the molding die. It can be heated and dried in a short time, and the work can be streamlined.

According to the seventh aspect of the present invention, by using a hot-melt type adhesive as an adhesive applied to the outer surface of the hollow paper piece, it is applied in a molten state, put into a molding die, pressed and rapidly cooled. By doing so, the product can be easily obtained, and the drying of the adhesive can be eliminated, and the drying equipment can be eliminated.

According to the invention as set forth in claim 8, the hollow small piece made of paper is used, which is obtained by applying a hot-melt adhesive to the outer surface and then rapidly cooling it, and the hollow small piece is preserved and reheated if necessary for molding. It can be put into the mold and rapidly cooled to obtain the product,
Since the drying of the adhesive is unnecessary and the drying equipment is unnecessary, and the saved hollow paper pieces are used, it is possible to contribute to simplification of the manufacturing equipment of the packing material for packaging.

[Brief description of drawings]

FIG. 1 is a process drawing showing an embodiment of a manufacturing method of the present invention,

FIG. 2 is a perspective view showing a pressed state when pressure-bonding and cutting the paper tube in the same direction at a constant pitch,

FIG. 3 is a side view of a pillow-shaped piece which is a hollow piece made of paper,

4 is a plan view of the pillow-shaped small piece of FIG. 3,

FIG. 5 is a perspective view showing a pressed state when press-fitting and cutting the paper tube at regular pitches at intervals of one another in a perpendicular direction;

FIG. 6 is an enlarged perspective view of a small triangular tetrahedron, which is a hollow paper piece.

FIG. 7 is a perspective view of a paper tube short piece which is a hollow paper small piece.

[Explanation of symbols]

1 ... Paper tube, 2 ... Pillow piece, 2a ... Side end, 3 ... Small triangular tetrahedron, 3a ... Side end, 3b ... Small triangular surface, 4 ...
Paper tube short piece.

Claims (8)

[Claims] 1. A method for producing a packing material for holding and packaging articles, the diameter of which is at least 10 m / m.
The following small hollow paper tubes are cut into short lengths and formed into a predetermined shape, and then a large number of hollow paper pieces are placed in a mold with an adhesive applied to the outer surface, and pressed and solidified into the desired shape. A method for producing a packing material for packaging, characterized by comprising: 2. The paper hollow small piece is a paper tube short piece.
A method for producing the packing material for packaging described. 3. A paper hollow small piece presses a predetermined small-diameter paper tube at a constant pitch in the same direction to cut simultaneously with bonding.
The method for manufacturing a packing material for packaging according to claim 1, wherein the packing material is a pillow-shaped piece in which both ends are joined and air is enclosed inside. 4. A hollow paper piece is made by pressing a predetermined small paper tube at a fixed pitch every other direction so as to cross the directions and simultaneously cutting and bonding, and both ends are joined so that air is enclosed inside. The method for manufacturing a packing material for packaging according to claim 1, wherein the packing material is a small triangular tetrahedron. 5. The adhesive for producing a paper tube and the adhesive applied to the outer surface of the hollow paper piece are biodegradable.
5. The method for manufacturing the packing material for packaging according to any one of 1 to 4. 6. A molding die is made of a material that easily transmits and propagates electromagnetic waves such as high frequency and microwaves or ultrasonic waves, and a hollow paper piece is put into the molding die and press-molded. 6. The packing material for packaging according to claim 1, wherein the adhesive applied to the outer surface of the hollow paper small piece is dried and solidified by electromagnetic waves such as high-frequency waves and microwaves or ultrasonic waves from the outside. Method. 7. An adhesive applied to the outer surface of a hollow paper piece is
The method for producing a packing material for packaging according to claim 1, which is a hot-melt adhesive. 8. A hot melt type adhesive is applied to the outer surface of a hollow paper piece, then rapidly cooled and stored, and reheated immediately before being put into the forming die to exert the adhesive force of the adhesive to make the inside of the forming die. 8. The method for producing a packing material for packaging according to claim 7, wherein the adhesive is solidified by pouring into the container and solidifying the adhesive to integrate the hollow paper pieces.