JPH1099104A - Storage method and storage container of shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent white parts of shoes from yellowing in stowing white shoes or shoes having white parts. SOLUTION: When the shoes 1 at least a part to the counter, shoelace, and boot sole of which is white, is stored in a carton 3 or a corrugated fiberboard box 4, the shoes are wrapped with a synthetic resin film 2 such as polyethylene, polypropylene(PP), polyethylene terephthalate(PET), polyvinyl chloride(PVC), nylon, ethylene vinyl acetate(EVA) or the like, and then accommodated therein to be stored. On this occasion, by using the synthetic resin film 2 of not more than 8,300 of nitrogen gas permeability, the after-yellowing can be effectively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing yellowing of a white portion or a shoe having a white portion when the shoe is stored in a paper box.

[0002]

2. Description of the Related Art Conventionally, shoes using white artificial leather, fiber, synthetic resin, or the like as the material of the upper material, the upper part, or the shoelace, or white polyurethane, or the material of the shoe sole, for example. PVC containing rubber or polyurethane
It is known that, when shoes made of (polyvinyl chloride) or the like are stored in a paper box and stored for a long period of time, a problem that a white portion near the box turns yellow in particular. .

The exact mechanism by which this problem of yellowing occurs is unknown, but only the part initially close to the box is locally discolored and tends to progress over time, so that the temperature and Due to the influence of humidity and the like, some gas is generated from the paper box. This gas is composed of nitrogen oxide (NOx) contained in the gas itself or the atmosphere and an antioxidant contained in the white portion of the shoe. It is thought that it promotes adsorption or chemical reaction to cause yellowing.

Therefore, as a technique for preventing this yellowing,
For example, a technique as disclosed in JP-A-8-140711 has been proposed. In this technique, a malic acid aqueous solution having a predetermined concentration is applied to the surface of the shoe immediately before the white shoe is put in a paper box, so as to suppress the reaction between nitrogen oxide (NOx) and an antioxidant.

[0005]

However, if the acid solution is applied to the shoes as in the above technique, the physical properties of the shoes are inevitably reduced even though the concentration is low. Getting worse. In addition, there is a problem that an application step is required before packing the product in a box, which requires cost and labor.

[0006] Therefore, there has been a demand for a storage means which can prevent the problem of yellowing when stored in a paper container by simple means and which does not cost much.

[0007]

According to the present invention, in order to solve the above-mentioned problems, in claim 1, at least one of the upper, the shoelace, and the sole of the shoe is white and stored in a paper container. In the method, the shoes were wrapped with a synthetic resin film and then stored in a paper container and stored.

[0008] Then, a barrier layer is formed around the shoe by a synthetic resin film to prevent gas generated from the container from entering, thereby preventing yellowing. Here, it is considered that the gas generated from the paper container once accumulates in the container and then escapes out of the container with time. For this reason, the formation of the barrier layer only needs to have an effect for a limited period during the gas is released. For example, in the case of packaging with a synthetic resin film, it is not necessary to seal the opening or the like, but merely wrap it.

Further, as a material of the synthetic resin film,
Polyethylene, polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PV
Any of C), nylon, ethylene vinyl acetate (EVA) and the like are effective.

In the present invention, the nitrogen gas permeability of the synthetic resin film is set to 8,300 or less. Here, the gas permeability is 1 m at 25 ° C. (dry) at 1 atm.
^The amount of gas permeating (cc) in ² to 24 hours. (J
ISZ-1707)

That is, nitrogen oxides NOx such as NO and NO ₂ play a large role in yellowing.
Nitrogen gas permeability is set to 8,300 or less to prevent such intrusion. At this time, as described above, yellowing is considered to be caused by a chemical reaction being promoted by a gas component while the gas is released, and it is sufficiently effective if the permeation can be blocked only during the period when the gas is released. Therefore, although commercially available synthetic resin films are sufficiently effective in suppressing yellowing,
The present inventors have found that setting the nitrogen gas permeability to 5,900 or less is more effective in preventing yellowing. Therefore, it is effective if used, for example, especially for long-term storage. Of course, the nitrogen gas permeability is ideally zero.

According to a third aspect of the present invention, there is provided a method for storing shoes in which at least one of a shell, a shoelace and a sole is white.
Laminate a synthetic resin film on the back side of a paper container,
The shoe was stored in the container. In a fourth aspect, a synthetic resin layer is formed by applying a synthetic resin to the back side of a paper container, and the shoes are stored and stored in the container.

By laminating a synthetic resin film on the back side of the container or forming a synthetic resin layer in this manner, the same effect as wrapping with a synthetic resin film can be obtained. At this time, if the nitrogen gas permeability of the synthetic resin film or the synthetic resin layer is set to 8,300 or less, it is particularly suitable for long-term storage.

According to a sixth aspect of the present invention, there is provided a container for storing shoes in which at least one of a shell, a shoelace and a sole is white.
Laminate a synthetic resin film on the back side of a paper container,
Alternatively, a synthetic resin is applied to the back side of a paper container to form a synthetic resin layer, and the nitrogen gas permeability of the synthetic resin film or the synthetic resin layer is set to 8,300 or less. In such a container, it is not necessary to wrap the shoes with a film or the like, and the yellowing can be prevented simply by storing the shoes in the container. Therefore, the storing procedure is easy and convenient.

[0015]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an explanatory diagram showing an example of a method for storing shoes of the present invention, FIG. 2 is an explanatory diagram showing another storing method of the present invention, and FIG. 3 is an example diagram of a storage container according to still another storing method. It is.

The method for storing shoes according to the present invention is, for example, a shoe made of artificial leather, fiber, synthetic resin, or the like, or a shoe sole having a white upper or upper part or shoelace. White shoes, such as those made of polyurethane, rubber, or PVC (polyvinyl chloride) containing polyurethane, are packed in a carton (paper box). It has been developed as a technique for preventing a white portion from discoloring to yellow when stored for a while, and is characterized by being able to prevent problems with extremely simple measures and to be constructed at a low cost.

That is, the inventors of the present invention mainly consider that adsorption or reaction of an antioxidant contained in a white portion of a shoe and nitrogen oxide (NOx) contained in a gas or the like generated from a paper box is mainly caused by yellowing. Presumed to have become, and the conventional yellowing,
Initially, only the part close to the box is locally generated and spreads over time, and the degree of yellowing varies. After accumulating, it was thought that the gas would escape from the box with time, and it was thought that it would be sufficient to suppress the permeation of gas for a limited period during which gas or the like escaped from the box.

Therefore, as a means for temporarily suppressing the gas generated from the carton before storing the shoes in the carton, it was conceived to wrap the shoes with a synthetic resin film to form a barrier layer. The experiment was repeated using

First, as an experiment 1, as shown in FIG. 1, white shoes 1 were made of polyethylene, polyethylene terephthalate (PET), polyvinyl chloride (PVC), nylon, ethylene vinyl acetate (EVA), and polypropylene (PP). Wrapped in each synthetic resin film 2 and stored in a carton (paper box) 3, then put in a cardboard cardboard 4 and stored in a warehouse to investigate the yellowing over time, and store the shoes 1 directly in the carton 3. The degree of yellowing was compared with the method of storage in a cardboard box 4. In the shoes used, the sole was made of white polyurethane, the upper was made of white polyurethane artificial leather, and the shoelace was made of white cotton.

The present inventors have thought that among the components contained in the gas and the like, it is particularly effective to suppress the permeation of nitrogen gas, and examined the nitrogen gas permeability of the synthetic resin film used in the experiment. did. The results of this experiment are as shown in the following table.

[0021]

[Table 1]

As a result, the conventional storage method causes a problem of yellowing after about one and a half years. On the other hand, when wrapped with the synthetic resin film 2 as in the present invention, the film material is made of polyethylene or polyethylene terephthalate. (PET),
It can be seen that any of polyvinyl chloride (PVC), nylon, ethylene vinyl acetate (EVA), and polypropylene (PP) has no problem when stored for 3 years if the nitrogen gas permeability is 8,300 or less. Further, it was found that the nitrogen gas permeability was more preferably 5,900 or less, and it did not yellow even after storage for 5 years. Incidentally, when wrapping with the synthetic resin film 2, it was effective to simply wrap without opening the opening end.

Here, the nitrogen gas permeability means 1 atmosphere, 2 atmospheres,
It is the amount of nitrogen gas (cc) that permeates from 1 m ² in 24 hours at 5 ° C. (dry), and it is ideal to make the nitrogen gas permeability zero, but from the viewpoint of cost-effectiveness, It is considered to be efficient to select and use the film 2 having a nitrogen gas permeability effective for preventing yellowing substantially in consideration of the storage period and the like.

Next, as Experiment 2, a white shoe 1 similar to that of Experiment 1 was prepared, the synthetic resin film 2 was formed into a bag, and the shoe 1 was wrapped. Then, as shown in FIG. Then, this was stored in a warehouse, and its temporal change was compared with a case where the shoe 1 was directly wrapped in the cardboard 4 without being wrapped with the synthetic resin film 2. The results are shown in the following table.

[0025]

[Table 2]

As a result, even in this case, it was found that the yellowing was more effective in suppressing yellowing than the conventional storage method. If the nitrogen gas permeability was 8,300 or less, the yellowness was maintained even after storage for 3 years. No discoloration occurred, and if the nitrogen gas permeability was 5,900 or less, no yellowing was observed even after storage for 5 years.

Further, as Experiment 3, as shown in FIG.
After laminating various synthetic resin films 2 inside the carton 3 and storing the same shoes 1 as in the experiment 1 in the carton 3, the carton 3 is put in a cardboard 4 and stored in a warehouse, and its change with time. Was examined in comparison with the case where the film 2 was stored inside the carton 3 without being laminated. The results are shown in the following table.

[0028]

[Table 3]

As a result, also in this case, as in the above example,
It has been found that yellowing is more effective than conventional storage methods in suppressing yellowing. If the nitrogen gas permeability is 8,300 or less, yellowing does not occur even after storage for 3 years, and nitrogen gas permeation does not occur. When the temperature was 5,900 or less, it was found that the yellowing did not occur even after storage for 5 years. Here, the nitrogen gas permeability was measured by peeling the laminated film 2 from the carton 3 and the thickness was measured from a cross-sectional photograph.

Further, as an experiment 4, inside the carton 3, ethylene vinyl acetate (EVA), polyvinyl chloride (PV
C) Each resin such as nylon is applied, and the same shoes 1 as in Experiment 1 are stored in the carton 3. Then, the carton 3 is put in a cardboard cardboard 4 and stored in a warehouse, and the resin is applied inside the carton 3. Investigation was made in comparison with the case where it was not stored. The results are shown in the following table.

[0031]

[Table 4]

In this case as well, it was found that yellowing was effective in suppressing yellowing. If the nitrogen gas permeability was 8,300 or less, yellowing did not occur even after storage for 3 years. It was found that if the transmittance was 5,900 or less, no yellowing occurred even after storage for 3 to 5 years. Here, the nitrogen gas permeability was measured by forming a coating resin film on release paper under the same conditions as those applied to the carton 3 and measuring the nitrogen gas permeability.

From the above experimental results, if the white shoes 1 are wrapped in a synthetic resin film 2 having a nitrogen gas permeability of 8,300 or less and stored in a carton 3 or a cardboard 4, the white shoes 1 are generated from the carton 3 and the cardboard 4. Nitrogen oxide (NOx) contained in the gas or nitrogen oxide (NOx) contained in the atmosphere can be suppressed from reacting or adsorbing upon contact with the antioxidant in the white portion, and yellowing can be prevented. ,
It has been found that the nitrogen gas permeability can be more effectively suppressed by setting it to 5,900 or less.

Even when the synthetic resin film 2 is laminated on the inside of the carton 3 or a resin coating is applied to form a synthetic resin layer, the same yellowing prevention effect as in the case of wrapping with the synthetic resin film 2 may be obtained. understood. Further, instead of laminating the synthetic resin film 2 inside the carton 3 or the like, the film 2 is laminated inside the cardboard 4 or a synthetic resin layer is formed with a resin paint, or the inside of the carton 3 and the inside of the cardboard 4 are formed. Lamination may be performed on both.

From the above, according to the present invention, the carton 3
Alternatively, in consideration of the storage period in a paper container such as cardboard 4, a barrier layer of nitrogen gas is formed around the white shoe 1 using a synthetic resin film 2 effective for preventing yellowing, and the yellowing reaction Suppress. And in this way, the synthetic resin film 2
It is effective only to wrap in a paper container, or to laminate a synthetic resin film or a synthetic resin layer inside a paper container such as a carton 3, so that shoes may be damaged as in the conventional technique of applying an aqueous solution of malic acid. It is convenient and can be constructed at low cost without much trouble.

According to the experiment, when a polyurethane material is used as the sole material, the shoe 1 is made of a synthetic resin film 2.
It has been found that a secondary effect of improving hydrolysis resistance can be obtained by performing a treatment such as wrapping in water. That is, when the hydrolysis resistance is evaluated from the moisture permeability of each synthetic resin film 2, polyethylene, polyethylene terephthalate (PE)
No matter which synthetic resin film 2 of T), polyvinyl chloride (PVC), nylon, ethylene vinyl acetate (EVA) or polypropylene (PP) is used, the shoe 1 stored for 5 years has a crack in a 300,000 bending test. There were no defects such as bottom cracks. This is presumably because, when wrapped with the synthetic resin film 2, permeation and penetration of moisture are prevented, and the hydrolysis resistance is improved.

[0037]

As described above, according to the present invention, shoes containing a white portion are wrapped with a synthetic resin film and stored and stored in a paper container, so that yellowing can be prevented by a very simple procedure. . In addition, when the shoe material is a polyurethane material, a secondary effect of improving hydrolysis resistance can be obtained by wrapping the shoe material with a synthetic resin film. In addition, since it is not necessary to seal the opening and the like in particular, no labor is required and the cost can be reduced. If the nitrogen gas permeability is 8,300 or less, the duration of the effect of preventing yellowing can be extended. Further, if a synthetic resin film is laminated on the back side of the container or a synthetic resin is applied to form a synthetic resin layer, it is convenient since no trouble is required when storing shoes.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a shoe storage method according to the present invention.

FIG. 2 is an explanatory view showing another storage method of the present invention.

FIG. 3 is a diagram showing an example of a storage container according to still another storage method of the present invention.

[Explanation of symbols]

1 ... shoes, 2 ... synthetic resin film, 3 ... carton, 4 ... cardboard.

Claims (7)

[Claims] 1. A method of storing white shoes in a paper container in which at least one of a shell, a shoelace, and a shoe sole is stored in a paper container. A shoe storage method characterized by being stored in a container for storage. 2. The method for storing shoes according to claim 1, wherein said synthetic resin film has a nitrogen gas permeability of 8,3.
A method for storing shoes characterized by being at most 00. 3. A method for storing shoes in which at least one of an upper, a shoelace and a sole is white, wherein a synthetic resin film is laminated on the back side of a paper container, and the shoes are stored in the container. A method for storing shoes, characterized by being stored and stored. 4. A method for storing shoes in which at least one of a shell, shoelace, and sole is white, wherein a synthetic resin is applied to the back side of a paper container to form a synthetic resin layer. A method for storing shoes, comprising storing the shoes in a container. 5. The shoe storage method according to claim 3, wherein the synthetic resin film or the synthetic resin layer has a nitrogen gas permeability of 8,300 or less. Method. 6. A container for storing white shoes, wherein at least one of the upper, the shoelace and the sole is a white shoe, wherein a synthetic resin film is laminated on the back side of a paper container, or the back side of a paper container. A shoe storage container in which a synthetic resin is applied to form a synthetic resin layer. 7. The shoe storage container according to claim 6, wherein the synthetic resin film or the synthetic resin layer has a nitrogen gas permeability of 8,300 or less.