JP2003072854A - Packaging cushioning body, and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging cushioning body in place of an expanded polystyrene (EPS) which satisfies the requests such as high cushioning performance, environmental conservation, effective use of resources, low cost, etc., and a manufacturing method of the packaging cushioning body. SOLUTION: In the manufacturing method of the packaging cushioning body, the packaging cushioning body is formed by cutting paper and fiber, mixing a binder and/or a foaming agent in the cut paper and the cut fiber to form a block of an arbitrary shape, and drying the formed block body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning body for packaging and a method for manufacturing the cushioning body for packaging.
Concerning a packaging cushion to be put in a container together with a product to protect the product from an unexpected impact applied to the product stored in the packaging container for transportation, cargo handling, warehousing, etc., and a method for manufacturing the packaging cushion Is.

[0002]

2. Description of the Related Art In the prior art, in order to protect electric products, etc., stored in a packaging container, which are transported, loaded, or stored in a warehouse from an unexpected impact, a block-shaped cushioning body is provided so as to surround the product in the packaging container. It is customary to include. Conventionally, as the material of the above-mentioned buffer body, foamed polystyrene (hereinafter,
EPS; Expanded PloyStyrene) has been used exclusively.

EPS is used in a large amount as a cushioning material due to its high buffering performance (impact energy absorbing performance), is chemically stable, is lightweight and inexpensive, and has been discarded in large quantities after use. It was

In recent years, a so-called recycling society in which the limited resources on the earth are effectively used by reducing or reusing (reusing) the waste instead of the conventional disposable society of mass production, mass consumption and mass disposal Has come to be required.

Contrary to the above features as a cushioning material, EPS is called an enemy of waste reduction because of its bulkiness, chemical decomposition, high combustion heat, and difficulty in recycling. It is beginning to be considered a good target.
Therefore, from the viewpoint of realizing a recycling-oriented society and effective use of fossil resources, there has been a strong demand for cushioning materials to replace EPS.

As a substitute material for EPS, a raw (natural) degradable plastic made from cornstarch has been developed, but the price is high (2 to 3 times that of EPS).
Therefore, it has not become popular.

On the other hand, there is a pulp mold which has been used for many years as a fixed packaging for fruits and vegetables and as an egg pack. This pulp mold is made by dissolving used paper such as newspapers and corrugated board in water using a device called pulper to make pulp, and then molding this pulp with a mold to put it in a drying oven to remove water. It is manufactured by a so-called wet manufacturing method having a complicated process of

[0008]

However, the pulp mold has been attracting attention as an EPS alternative material because it naturally decomposes, can be recycled, is not bulky, and can be easily chemically treated. However, since the pulp mold does not have the same level of cushioning properties as EPS, it is not suitable for packaging heavy items weighing several tens of kg or more. Further, there is a problem in that a large amount of time and heat energy are consumed in the drying process, so that the cost is high, time is required for designing, trial production, and evaluation, and lead time is long.

Further, a buffer body called a cell mold by a dry manufacturing method in which a paper material obtained by cutting waste paper into fine pieces is hardened with a binder has been considered, but this has a large weight because a gap between the paper materials hardly occurs. In addition, it is heavy and not sufficiently compatible with the binder and has a small surface area, so that powder easily falls off.

Therefore, there are problems that the above-mentioned drawbacks of the pulp mold and the cell mold should be solved, and that a cushioning body as an EPS substitute material and a cheap manufacturing of the cushioning body should be solved.

[0011]

In order to solve the above-mentioned problems, the packaging cushioning body and the method for manufacturing the packaging cushioning body according to the present invention are configured as follows.

(1) For packaging, wherein the cut paper material, the cut fiber material, and the binder for binding the paper material and the fiber material are mixed and foam-formed. Buffer. (2) The packaging cushion according to (1), wherein the paper material is a low-grade waste paper such as magazines, newspapers, corrugated paper, and mixed paper. (3) The packaging cushion according to (1), wherein the fiber material is a natural fiber material such as cotton, hemp, wool, and wood wool. (4) The packaging cushion according to (1), wherein the fiber material is a chemical fiber material such as polyethylene terephthalate or polyester. (5) The binder is a starch-based paste such as cornstarch, PVA (PolyVinyl Alcoho).
l), a packing buffer according to (1), which is a naturally degradable material such as cellulose, gelatin, or a natural rubber. (6) The packaging buffer according to (5), wherein the naturally degradable material contains a preservative and / or an insect repellent and / or a fungicide and / or a deodorant. (7) The packaging cushion according to (1), wherein the mixing ratio of the paper material is 30% or more and 60% or less. (8) The size of the cut paper material is one side length
The packaging cushion according to (1), which has a square shape of 5 mm or more and 5 mm or less. (9) The size of the cut paper material is such that the length of one side is 2
The packaging cushion according to (1), which has a rectangular shape with a size of not less than 6 mm and not more than 6 mm. (10) The size of the cut fibrous material is a rectangular shape with one side having a length of 2 mm or more and 6 mm or less, and the packaging cushion according to (1).

(11) A paper material and a fiber material are cut, and the cut paper material and the fiber material are mixed with a binder and / or a foaming agent to form a block body having an arbitrary shape, and the formed block A method for producing a packaging buffer, which comprises drying the body to produce a buffer. (12) The paper material is low-grade waste paper such as magazines, newspapers, corrugated paper, and mixed paper (1)
The method for producing the packaging cushion according to 1). (13) The method for producing a packaging cushioning body according to (11), wherein the fiber material is a natural fiber material such as cotton, hemp, wool, and wood wool. (14) The fiber material is polyethylene terephthalate,
The method for producing a packaging cushioning body according to (11), which is a chemical fiber material such as polyester. (15) The binder is a starch-based paste such as cornstarch or PVA (PolyVinyl Alcoho).
l), cellulose, gelatin, a natural degradable material such as natural rubber, and the method for producing a packaging buffer according to (11). (16) The method for producing a packaging buffer according to (15), wherein the naturally degradable material contains a preservative and / or an insect repellent and / or a fungicide and / or a deodorant. . (17) The method for manufacturing a packaging cushioning body according to (11), wherein the mixing ratio of the paper material is 30% or more and 60% or less. (18) The method of manufacturing a packaging cushioning body according to (11), wherein the size of the cut paper material is a square shape having a side length of 1 mm or more and 5 mm or less. (19) The method for manufacturing a packaging cushioning body according to (11), wherein the size of the cut paper material is a rectangular shape having one side of 2 mm or more and 6 mm or less. (20) The method for producing a packaging cushioning body according to (11), wherein the cut fiber material has a rectangular shape with a side length of 2 mm or more and 6 mm or less.

A suitable space is created by mixing and molding the cut paper material, the fiber material, the binder and the foaming agent by the above-described packaging cushion and the method for manufacturing the packaging cushion. It becomes a cushioning body for packaging that is integrated into a held block,
It becomes possible to obtain a buffer body having excellent buffering properties.
Since the manufacturing process is a simple dry manufacturing method that does not include a conventional wet process, the manufacturing cost can be reduced.

Further, the cost of raw materials is suppressed by using low-grade waste paper such as magazines, newspapers, corrugated paper, and mixed paper as the paper material, and using waste materials such as second-hand clothes which are rarely reused for the fiber material. can do. Further, by changing the mixing ratio and size of the cut paper material and fiber material, it is possible to obtain an arbitrary cushioning performance.

Natural fiber materials such as cotton, hemp, wool, and wood wool are used as the fiber material, and a starch-based paste such as cornstarch as a binder, PVA (PolyVinyl Alc).
ohol), cellulose, gelatin, natural rubber-based materials, etc., will naturally decompose even if discarded after use,
It does not cause environmental pollution. In addition, by properly containing a preservative, an insect repellent, a fungicide, a deodorant, etc. in the binder, the product to be packaged is prevented from spoiling or being attached with insects.

Further, by setting the mixing ratio of the paper materials to 30% or more and 60% or less, the optimum cushioning performance required for the cushioning body,
Weight, strength, etc. can be obtained.

Further, a paper material cut into a square shape having a side length of about 1 to 5 mm or a rectangular shape having a side length of 2 to 6 mm, and a rectangular shape having a side length of about 2 to 6 mm. By mixing these with a binder or a foaming agent, it is possible to manufacture a block-shaped integrated packaging cushion body that fits into each other and holds uniform and appropriate voids. it can.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the packaging cushion and the method for manufacturing the packaging cushion according to the present invention will be described in detail below.

The cushioning body for packaging according to the present invention is manufactured through the following manufacturing processes. First, waste paper such as magazines, newspapers, corrugated paper, and mixed paper is collected, and this is subdivided using a cutter to make paper materials. The size of the cut paper material is a square having a side length of 1 to 5 mm or a side length of 2 to 5.
A 6 mm rectangular (rectangular) shape is desirable. By using low-grade paper with a low recycling rate in this way, resources can be effectively used.

[0021] In addition, used clothes or the like made of vegetable fibers such as cotton, hemp, wool (wool), and wood fibers or animal fibers are subdivided by using a cutter to make a fiber material (unravel). The length of one side of the cut fiber material is preferably a strip shape having a length of 2 to 6 mm. In addition, polyethylene terephthalate (PETP;
Polyethylene terephthalate
e), it is possible to use chemical fiber materials such as polyester, but used clothing made of chemical fiber materials is the natural fiber material from the viewpoint of easy decomposability when it is landfilled after discarding the buffer. Is desirable.

The reason for limiting the size of the cut fiber material to the length of one side of 2 to 6 mm is as follows. If the size of the fiber material is reduced to 2 mm or less, the time and cost required for cutting increase. On the other hand, if it is made too fine, the packing density will be high, the buffering property will be reduced, and the weight of the buffer will be heavy. From the viewpoint of transportation cost, it is better to say that the lighter the better, the buffer body is inevitably put in the packaging container together with the product in order to protect the target product to be transported.

When the size of the fiber material is 6 mm or more on one side, the packing density becomes low and the predetermined cushioning property cannot be obtained, and the material is not uniformly mixed with the paper material, resulting in uneven distribution. This causes variations in the cushioning property of the cushioning body.

The paper material and the fiber material prepared as described above are mixed at a predetermined mixing ratio. The mixing ratio is appropriately determined within the range of 50% ± 20% according to the required buffer performance.

Good cushioning properties can be obtained due to the appropriate voids produced by mixing the cut paper material and the fiber material and the flexibility of the fiber. If the proportion of paper material is increased, the weight of the cushioning body becomes lighter, but the rigidity of the cushioning body increases. On the contrary, if the ratio of the fiber material is increased, the softness and strength of the cushioning body are increased, but the total weight is increased.

The cut paper material has a mixing ratio of 30% or less and 7
When the content is 0% or more, the characteristics are the same as those of the cushioning body in which the cut fiber material and the paper material are used alone, and their respective disadvantages are too much. Therefore, the mixing ratio is within the above range. However, the mixing ratio is not necessarily limited to the above range depending on the attribute of the product to be protected. For example, TV
Since a certain amount of strength is required for packaging heavy articles such as, the weight may be sacrificed to increase the mixing ratio of the fiber materials.

After the paper material and the fibrous material prepared as described above are thoroughly mixed, a binder or a foaming agent, which is a mixture of starch paste such as cornstarch and natural rubber, is added. The binder such as starch paste may appropriately contain a preservative, an insect repellent, a fungicide, a deodorant and the like. It is desirable that the amount of the binder added is such that powder of the molded article of the buffer does not fall off, but it is generally 10 to 30% by weight.
The binder is PVA (PolyVinyl).
Needless to say, starch-based glue may be used as long as it is a naturally degradable material such as Alcohol), cellulose, gelatin, and natural rubber.

As a method for adding the binder, the starch and natural rubber may be dissolved in a solvent in advance to form a paste, and the binder may be added to the mixture of the cut paper material and fiber material,
Powdered or solid starch may be added to the above mixture and uniformly mixed, and then the mixture may be heated and melted at the time of pressure molding described later to form a paste.

The reason for using natural substances such as starch and natural rubber as a binder and not using artificial substances such as plastics and synthetic rubber is that they are easily soluble at the time of recycling and easily decomposed at the time of disposal (landfill). This is because the sex is taken into consideration.
Therefore, ethyl cellulose, cellulose acetate, P
A readily degradable material such as VA (Polyvinyl alcohol) does not prevent its use as a binder.

A mixture of a binder (and a foaming agent), a paper material and a fibrous material is molded into a predetermined shape and size required by cushioning design. Molding is carried out by placing the above mixture in a mold and applying pressure and heating if necessary.

When the above mixture is a mixture of molten paste-like binders, it may be semi-dried before pressure molding if necessary.

FIG. 1 is a maximum strain-buffer coefficient diagram showing the buffer performance of the buffer manufactured by the above manufacturing method. In this diagram, the strain ε (%) is plotted on the horizontal axis, and the cushioning coefficient Cf and the dynamic stress σ (Kg / cm ² ) are plotted on the vertical axis.

The cushioning coefficient Cf is a coefficient representing the ability of the cushioning body to absorb impact energy and is an important factor for packaging design. The shock absorber having the impact coefficient Cf of 1 is the best, and the closer to 1, the better the shock absorbing performance is. For example, in order to absorb the same impact energy, it means that the shock absorber having the shock coefficient Cf = 2 requires twice the thickness of the shock absorber having the Cf = 1. That is, the smaller the impact coefficient Cf, the thinner the material can be designed.

As shown in FIG. 1, the cushioning body for packaging according to the present invention has an excellent cushioning performance in the region where the dynamic stress required for a cushioning body having a weight of about 20 kg is 3 to 8 kg / cm ^2. Is shown.

FIG. 2 shows the relationship between the dynamic stress σ and the maximum acceleration G measured for two types of natural fibers A and B in order to obtain the maximum strain-damping coefficient diagram shown in FIG.
It is the maximum acceleration curve. In any case, the dynamic stress is 6
The minimum maximum acceleration G value was obtained at around 7 Kg / cm ² .

The curve shown in FIG. 2 can be adjusted to a desired value depending on the type of natural fiber (cotton, linen, etc.), the length of the fiber material, the mixing ratio, the type of waste paper, and the like.

[0037]

EFFECTS OF THE INVENTION By the above-mentioned packaging cushioning body and the packaging cushioning body manufacturing method, the cut paper material, the fiber material, the binder and the foaming agent are mixed and molded to obtain a suitable shape. It becomes a packaging cushioning body that is integrated into a block shape that retains a space and has excellent cushioning properties. Since the manufacturing process is a simple dry process that does not include a conventional wet process, the manufacturing process is simple and does not take time, and the manufacturing cost required for heat energy, water, etc. is low, so the price can be reduced. . In addition, it is less likely to become hard as compared with the wet method.

Further, there is an advantage that the cost of raw materials can be suppressed by using low-grade waste paper such as magazines, newspapers, corrugated paper, and mixed paper as the paper material and utilizing waste products such as old clothes as the fiber material. Using natural fiber materials such as cotton, hemp, wool, and wood wool as the fiber material, starch-based glue such as cornstarch, PVA (PolyVinyl Al)
(Cohol), cellulose, gelatin, natural rubber, and other binders having natural degradability are mixed and molded, so that they are not decomposed naturally even if they are disposed of after use and cause no environmental pollution. Therefore, aiming at environmentally friendly packaging that does not have environmental destruction and environmental pollution factors that are the cause of EPS (styrofoam) repelling, and cheap raw materials without using fossil (petroleum) resources that are depleted resources. At E
It realizes a buffer with the same buffer performance as PS, and can be recycled and reused, which contributes to environmental conservation, resource saving, and cost reduction, and eliminates a mountain of waste from the earth. It is also in line with the direction of so-called zero emission.

Further, it is possible to obtain an arbitrary cushioning performance by changing the mixing ratio and size of the cut paper material and the fiber material. However, the paper material has a square shape whose one side length is about 1 to 5 mm or By cutting into a rectangular shape having a side length of 2 to 6 mm, and cutting the fibrous material into a rectangular shape having a side length of about 2 to 6 mm, the mixing ratio of the paper material is 30% or more and 60% or less. It is possible to obtain the required optimum cushioning performance, weight, strength and the like. Further, since the size, shape, weight and type of the object to be protected are not limited, it is also suitable as a buffer for heavy objects exceeding several tens kg, unlike pulp molds and cell molds, and there is no powder drop. In addition, by appropriately including a preservative, an insect repellent, a fungicide, a deodorant, etc. in the binder, it is most suitable for packaging of perishable or insect-prone items. Overall, the present invention does not pollute the global environment, does not waste finite resources,
It is an epoch-making product that provides a cushioning body having a performance equivalent to or higher than that of EPS at a reasonable price for users and at a low cost for manufacturers in the field of packaging technology.

[Brief description of drawings]

FIG. 1 is a maximum strain-cushion coefficient diagram showing the cushioning performance of a packaging cushioning body according to the present invention.

FIG. 2 is a graph of a dynamic stress-maximum acceleration curve of a fiber material used for calculating the diagram of FIG.

[Explanation of symbols]

Cf: impact coefficient, σ: dynamic stress, ε: strain.

Claims (20)

[Claims] 1. A cushion for packaging, characterized in that a cut paper material, a cut fiber material, and a binder for binding the paper material and the fiber material are mixed and foam-molded. body. 2. The cushioning material for packaging according to claim 1, wherein the paper material is a low-grade waste paper such as magazines, newspapers, corrugated paper, and mixed paper. 3. The packaging cushion according to claim 1, wherein the fiber material is a natural fiber material such as cotton, hemp, wool, and wood wool. 4. The packaging cushion according to claim 1, wherein the fiber material is a chemical fiber material such as polyethylene terephthalate or polyester. 5. The binder is a starch-based paste such as corn starch, PVA (PolyVinyl Alcoh).
Ol), cellulose, gelatin, a natural degradable material such as natural rubber, and the packaging buffer according to claim 1. 6. The packaging buffer according to claim 5, wherein the naturally degradable material contains a preservative and / or an insect repellent and / or a fungicide and / or a deodorant. 7. The packaging cushion according to claim 1, wherein the mixing ratio of the paper material is 30% or more and 60% or less. 8. The packaging cushion according to claim 1, wherein the size of the cut paper material is a square shape having a side length of 1 mm or more and 5 mm or less. 9. The cushioning body for packaging according to claim 1, wherein the size of the cut paper material is a rectangular shape whose one side length is 2 mm or more and 6 mm or less. 10. The packaging cushioning body according to claim 1, wherein the cut fiber material has a rectangular shape with a side length of 2 mm or more and 6 mm or less. 11. A paper material and a fibrous material are cut, and the cut paper material and the fibrous material are mixed with a binder and / or a foaming agent to form a block body having an arbitrary shape. A method for producing a packaging buffer, which comprises drying the buffer to produce a buffer. 12. The paper material is a magazine, a newspaper, a corrugated paper,
The method for producing a packaging cushioning body according to claim 11, which is a low-grade waste paper such as mixed paper. 13. The method for manufacturing a cushioning body for packaging according to claim 11, wherein the fiber material is a natural fiber material such as cotton, hemp, wool, and wood wool. 14. The method of manufacturing a cushioning body for packaging according to claim 11, wherein the fiber material is a chemical fiber material such as polyethylene terephthalate or polyester. 15. The binder is a starch-based paste such as corn starch, PVA (PolyVinyl Alco).
Hol), cellulose, gelatin, a natural degradable material such as natural rubber, and the method for manufacturing the packaging cushioning body according to claim 11. 16. The natural degradable material contains a preservative and / or
Alternatively, an insect repellent and / or a fungicide and / or a deodorant are contained, and the method for producing the packaging cushion according to claim 15. 17. The mixing ratio of the paper materials is 30% or more and 60% or more.
The method for producing a packaging cushioning body according to claim 11, wherein: 18. The method for producing a packaging cushioning body according to claim 11, wherein the size of the cut paper material is a square shape having a side length of 1 mm or more and 5 mm or less. 19. The method for manufacturing a packaging cushioning body according to claim 11, wherein the size of the cut paper material is a rectangular shape whose one side length is 2 mm or more and 6 mm or less. 20. The method for manufacturing a packaging cushioning body according to claim 11, wherein the size of the cut fiber material is a rectangular shape having a side length of 2 mm or more and 6 mm or less.