JPH079763U - Biodegradable cushioning material for packaging - Google Patents

Abstract

(57) [Abstract] [Purpose] Suppresses the growth of fungi during use, and biodegradation proceeds after being used and discarded, allowing composting and volume reduction treatments. We provide a biodegradable cushioning material for packaging that makes the most of its features and helps protect the environment. [Configuration] At least a portion that comes into contact with the packaged object,
In a biodegradable cushioning material for packaging 1 formed of a biodegradable inner member, an outermost surface layer of the biodegradable inner member is provided with an antibacterial surface layer, and an antibacterial surface layer is formed on the outermost surface layer at the time of disposal. It is characterized in that crushing grooves 2a and 2b for dividing are provided. Further, as the substance having antibacterial property, a sustained release antibacterial agent whose antibacterial activity is gradually decreased by decomposition, elution, volatilization, etc. was used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a biodegradable cushioning material for packaging, has a structure in which the surface layer of the biodegradable cushioning material has antibacterial properties, and further, it is suitable for accelerating the biodegradation process at the time of disposal. The present invention relates to a sex cushioning material.

[0002]

[Prior art]

 Today, the problem of waste treatment is becoming more serious, and especially in Japan, where plastic consumption is high, material development is required to facilitate the smooth treatment of plastic waste. In response to this, a material called “biodegradable plastic”, which can be decomposed by microorganisms and returned to the circulation cycle of the ecosystem, has been attracting attention in recent years, and is being developed on a global scale.

Here, biodegradability is a property of being decomposed by microorganisms in soil or drainage. Biodegradable materials once become secondary products by the action of microorganisms, and are finally decomposed into carbon dioxide and water. In order to prevent pollution of sewage and reduce the amount of dust, various materials have been developed, such as detergent raw materials of vegetable ingredients and plastics that disappear when buried in the ground. For example, "a novel biodegradable composite material and a method for producing the same" described in JP-A-4-59830 and "packaging material" described in JP-A-4-136066 are known.

Containers and packages using biodegradable materials are effective as a means for solving the waste treatment problem. However, for example, when the product related to the packaged item is stored for a long time in the distribution stage, or when the purchaser stores the product together with the cushioning material for packaging, if the humidity of the storage environment becomes high, the biodegradable material may be added. Degrading fungi may grow and begin to degrade during use. In particular, when molds grow, there are problems in aesthetics and hygiene, and the commercial value decreases. Therefore, an antibacterial agent is mixed with the biodegradable material to prevent the above-mentioned problem of fungal growth.

[0005]

[Problems to be solved by the device]

 As described above, if the biodegradable material is mixed with an antibacterial agent, for example, it becomes impossible to perform composting or volume reduction by biodegradation after the packaging cushioning material is discarded, or There was a problem that the rate of decomposition became extremely slow, and the original characteristics of biodegradable materials were lost.

Further, for example, in Japanese Patent Laid-Open No. 5-51073, biodegradability is described as suppressing growth of mold and the like during use, and biodegradability after use after disposal, which is useful for environmental protection. It is disclosed that at least the outermost surface of a plastic container is provided with an antibacterial property by kneading an antibacterial agent in which an antibacterial metal or metal compound is supported on an inorganic substance is kneaded. Such a container is useful as a product container to be used in a humid place such as a toiletry product or a place where it is easily wet with water. However, the above-mentioned prior art does not consider the composting process or volume reduction process of a relatively large packaging cushioning material by biodegradation after being discarded.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The purpose of the present invention is to suppress the growth of fungi during use and to promote biodegradation after use and disposal. However, the purpose of the present invention is to provide a biodegradable cushioning material for packaging that is useful for environmental protection, because it enables composting treatment and volume reduction treatment, and the original characteristics of biodegradable materials are utilized.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the structure of the first invention relating to the biodegradable cushioning material for packaging of the present invention is a packaging material formed of a biodegradable material, which has at least a portion that comes into contact with the object to be packaged. In a biodegradable cushioning material, the outermost surface layer of the cushioning material has antibacterial properties.

In order to achieve the above-mentioned object, the structure of the second invention relating to the biodegradable cushioning material for packaging of the present invention has at least a portion which comes into contact with the object to be packaged and is made of a biodegradable material. In the formed biodegradable cushioning material for packaging, the outermost surface layer of the cushioning material is provided with antibacterial properties, and the surface layer is provided with crushing grooves for dividing at the time of disposal.

In addition, the antibacterial property is imparted only to the outermost surface layer of the portion that comes into contact with the packaged object. Further, as the substance having antibacterial properties, a sustained-release antibacterial agent whose antibacterial activity is gradually reduced by decomposition, elution, volatilization, etc. is used.

[0011]

[Action]

 The functions of the above technical means are as follows. The biodegradable cushioning material for packaging according to the present invention does not undergo biodegradation due to the action of the antibacterial agent layer on the surface during use during transportation, storage, etc. By crushing the material, the crushed surface without antibacterial properties is exposed, and biodegradation proceeds from this crushed surface. If a sustained-release antibacterial agent whose antibacterial activity gradually decreases due to decomposition, elution, volatilization, etc. is used to promote decomposition after disposal, biodegradation also progresses from the surface of the buffer material. .

[0012]

【Example】

 Hereinafter, each embodiment of the present invention will be described with reference to FIGS. [Example 1] FIG. 1 is a perspective view of a biodegradable cushioning material for packaging according to an example of the present invention, and FIG. 2 is a side sectional view taken along the line AA of FIG. In FIGS. 1 and 2, 1 is a biodegradable cushioning material for packaging, 1a is an antibacterial surface layer, and 1b is a biodegradable inner member.

The biodegradable cushioning material 1 for packaging shown in FIG. 1 has an antibacterial surface layer 1a in which an outermost surface layer of a biodegradable inner material 1b formed of a biodegradable material is provided with antibacterial properties. ing. That is, the outermost surface layer of the biodegradable inner member 1b is impregnated with a substance having an antibacterial property or a coating film having an antibacterial property is formed.

Examples of the biodegradable inner member 1b of the present embodiment include a commercial product containing starch as a main ingredient and modified polyvinyl alcohol, a trade name “Matter Be” (manufactured by Nippon Gohsei Kagaku Kogyo), or , Commercial products made of aliphatic polyester, trade name "Bionole" (manufactured by Showa High Polymer), etc. are used.

Here, the antibacterial substance, that is, the antibacterial agent, is a material in which a metal such as silver, copper, or zinc, or a metal compound thereof is supported on an inorganic substance. For example, silver is used as zeolite. The supported one or the one in which copper is supported on montmorillonite is adopted. In addition, organic fungicides are also useful, and for example, alkylpyridinium iodide and the like may be used.

If the biodegradable cushioning material 1 for packaging of this example is adopted, the antibacterial agent layer on the surface, that is, the antibacterial property is exhibited during the use of the biodegradable cushioning material 1 for packaging, such as during transportation and storage of products. The function of the surface layer 1a prevents the growth of fungi and does not promote biodegradation, thus maintaining the commercial value.

Embodiment 2 Next, FIG. 3 is a perspective view of a biodegradable cushioning material for packaging according to another embodiment of the present invention, and FIG. 4 shows the biodegradable cushioning material for packaging of FIG. It is a perspective view showing a crushed state. In the figure, those having the same reference numerals as those in FIGS. 1 and 2 are equivalent parts, and the biodegradable cushioning material 1 for packaging shown in FIGS. The outermost surface layer 1b has an antibacterial surface layer 1a having antibacterial properties.

3a and 2b shown in FIG. 3 are a plurality of crushing grooves provided on the surface layer of the biodegradable cushioning material for packaging 1 for dividing at the time of disposal. FIG. 4 shows a state in which the biodegradable cushioning material 1 for packaging is used and then crushed into 2 pieces from the crushing groove 2a to expose the crushing surface 3, and further crushed along the crushing groove 2b to obtain 4 pieces. To do. It should be noted that the number of divisions is appropriately determined depending on the size and shape of the cushioning material.

According to the embodiment shown in FIGS. 3 and 4, the function of the antibacterial agent layer on the surface, that is, the antibacterial surface layer 1a is observed during the use of the biodegradable cushioning material 1 for packaging, such as during transportation of goods and during storage. This prevents the growth of fungi and prevents biodegradation, thus maintaining the commercial value. Then, when the function as a cushioning material is completed and the waste is discarded, first, the waste is crushed from the crushing grooves 2a and 2b at the time of discarding, and the exposed biodegradable inner member 1b of the crushed surface 3 which is not imparted with the antibacterial property is covered with fungi. It breeds, undergoes biodegradation, and can treat waste by biodegradation.

The antibacterial agent that constitutes the antibacterial surface layer 1a is, for example, a sustained-release antibacterial agent that gradually reduces its antibacterial activity due to decomposition, elution, volatilization, etc. by adsorbing silver and zinc ions on calcium phosphate. If the antibacterial surface layer 1a is used, the biodegradation of the antibacterial surface layer 1a starts with the deterioration of the antibacterial performance and the entire cushioning material decomposes and disappears. Needless to say, this sustained-release antibacterial agent may be used for the antibacterial surface layer of the first embodiment.

[Embodiment 3] Next, FIG. 5 is a perspective view of a biodegradable cushioning material for packaging according to still another embodiment of the present invention, and FIG. 6 is a side sectional view taken along the line BB of FIG. It is a figure. In the figure, the same symbols as those in FIGS. 1 and 2 indicate the same parts as those in the previous embodiment. The biodegradable cushioning material 1A for packaging shown in FIGS. 5 and 6 has an antibacterial surface layer 1a having an antibacterial property added to the outermost surface layer of the biodegradable inner member 1b only in a portion in contact with a packaged object. It is formed.

According to the embodiments of FIGS. 5 and 6, the same effect as that of the embodiments of FIGS. 1 and 2 can be obtained. Also, although not shown, in the embodiment of FIGS. 5 and 6, similar to the embodiment of FIGS. 3 and 4, if the surface layer is provided with a plurality of crushing grooves for dividing at the time of disposal, It goes without saying that the same effects as the third and fourth embodiments can be obtained. In the embodiments of FIGS. 5 and 6 described above, the antibacterial surface layer 1a is formed only in the portion in contact with the object to be packaged, but the present invention is not limited to this, and the antibacterial property is required. The anti-bacterial surface layer 1a is formed on the outermost surface layer of the biodegradable inner member 1b only in a part thereof, or the anti-bacterial property is imparted to the entire surface and a part other than the surface layer. The same effect as the example is obtained.

In addition, during production, the biodegradable cushioning material 1 for packaging of the present invention is sterilized inside by passing through a heating process at 100 ° C. or higher, and biodegradation that does not impart antibacterial properties during use. It is also possible to prevent the fungus from propagating first from the sex member 1b. Furthermore, it goes without saying that if a sustained release antibacterial agent is used for the antibacterial surface layer, the same effects as those described in the examples of FIGS. 3 and 4 can be obtained.

[0024]

[Effect of device]

 As described above in detail, according to the present invention, growth of fungi is suppressed during use, biodegradation proceeds after being used and discarded, and composting treatment and volume reduction treatment can be performed. By utilizing the original characteristics of biodegradable materials, it is possible to provide a biodegradable cushioning material for packaging that is useful for environmental protection.

[Brief description of drawings]

FIG. 1 is a perspective view of a biodegradable cushioning material for packaging according to an embodiment of the present invention.

FIG. 2 is a side sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of a biodegradable cushioning material for packaging according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a state in which the packaging biodegradable cushioning material of FIG. 3 is crushed.

FIG. 5 is a perspective view of a biodegradable cushioning material for packaging according to still another embodiment of the present invention.

6 is a side sectional view taken along the line BB of FIG.

[Explanation of symbols]

1, 1A ... Biodegradable cushioning material for packaging, 1a ... Antibacterial surface layer, 1b ... Biodegradable inner member, 2a, 2b ... Crush groove, 3 ...
Crushed surface.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 27/18 F 8413-4F B65D 81/107

Claims (5)

[Scope of utility model registration request] 1. A biodegradable cushioning material for packaging which is formed of a biodegradable material and which has at least a portion that comes into contact with an article to be packaged, wherein the outermost surface layer of the cushioning material has antibacterial properties. Characteristic biodegradable cushioning material for packaging. 2. A biodegradable cushioning material for packaging, which has at least a portion in contact with an article to be packaged and is formed of a biodegradable material, while imparting antibacterial properties to the outermost surface layer of the cushioning material, A biodegradable cushioning material for packaging, wherein the surface layer is provided with a crushing groove for dividing at the time of disposal. 3. The biodegradable cushioning material for packaging according to claim 1, wherein an antibacterial property is imparted only to the outermost surface layer of the portion that comes into contact with the article to be packaged. 4. The package according to claim 1, wherein an antibacterial metal or an organic bactericidal agent in which an antibacterial metal or a metal compound is supported on an inorganic substance is used as the substance having antibacterial properties. Biodegradable cushioning material. 5. The sustained-release antibacterial agent whose antibacterial activity is gradually reduced by decomposition, elution, volatilization, etc. is used as the antibacterial substance. Biodegradable cushioning material for packaging.