JP2001010660A - Packaging paper and paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container which is most suitable for use of storing or packaging of either foods or perishable foodstuffs by a method wherein either a deodoring function or humidity adjusting function is applied to paper material of a paper container. SOLUTION: A paper material 3 provided with a charcoal coated layer 2 having charcoal powder coated on its surface is applied to form a paper container 1 by this paper material 3 with the charcoal coated layer 2 being applied as an inner layer, resulting in that it is possible to prevent odor from being attached to the foods due to deodoring function and humidity adjusting function, taste of foods is not reduced and at the same time, freshness of the perishable foodstuffs can be kept for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping paper and a paper container suitable for storing and packaging various foods and fresh foods.

[0002]

2. Description of the Related Art Paper containers have good workability and can be formed in a required size and shape by selecting paper thickness and paper quality, etc., and are inexpensive and easy to use after use. It is used as a packaging container in various fields.

[0003] In addition, wrapping paper is frequently used for wrapping and packing various articles.

For example, paper materials and wrapping paper used for paper containers for storing foods and fresh foods such as various kinds of lunches are the safest because the foods come into direct contact with them except for the strength. Sex is important.

For this reason, as a paper material for a conventional paper container, a paper material coated with an acrylic synthetic resin on the surface to reinforce the paper material and to impart water resistance is used.

[0006]

By the way, the coating film of acrylic synthetic resin applied to the surface of the paper material can impart water resistance to the surface of the paper material, but has a deodorizing function and a humidity control function. When foods of different types are put at the same time, such as a lunch box, the smell of the foods is transferred to each other, thereby deteriorating the quality and taste of the foods.

In addition, since there is no humidity control function, other foods are moistened by the moisture from the food, and the texture and taste are reduced, and when fresh foods are stored, the freshness is reduced in a short period of time. There is a problem.

Further, conventional wrapping paper is merely printing paper, so that even when packaging food or fresh food, deodorization and humidity control cannot be obtained.

Accordingly, an object of the present invention is to provide a wrapping paper and a paper material of a paper container with a deodorizing function and a humidity control function, so that the wrapping paper is optimally used for storing and packaging foods and fresh foods. And a paper container.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention of claim 1 employs a structure in which powdered charcoal is applied to the surface of a wrapping paper to provide a charcoal coating layer. It is.

According to a second aspect of the present invention, in the first aspect of the present invention, the charcoal-coated layer is formed by adding a powder of charcoal of about 200 μm to the acrylic synthetic resin at a weight ratio of 1 to the acrylic synthetic resin 3. Mix it with 0.05m on the surface of the wrapping paper
This adopts a configuration formed by coating with a thickness of m.

The invention according to claim 3 employs a structure in which a charcoal coating layer is provided by applying powdered charcoal to the inner surface of a container formed using paper.

The invention according to claim 4 employs a configuration in which a container is formed by using a paper material provided with a charcoal coating layer by applying a charcoal powder on the surface, and using the paper material with the charcoal coating layer as an inner surface. It was done.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the charcoal coating layer is formed by adding about 200 μm charcoal powder to the acrylic synthetic resin and weighing 1 unit to the acrylic synthetic resin 3. At a rate of 0.05% on the surface of the paper.
This adopts a configuration formed by applying a thickness of mm.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

The embodiment shown in FIG. 1 is a paper container,
The paper container 1 is made of a paper material 3 such as a cardboard provided with a charcoal coating layer 2 by applying a charcoal powder on the surface, and the paper material 3 is manufactured such that the charcoal coating layer 2 becomes an inner surface. It is formed as a box.

The illustrated paper container 1 is an example, and the paper quality and thickness of the paper material 3 to be used, the box structure and size of the container, and the like.
The design or the like is not limited to this, and may be arbitrarily selected according to the article to be stored.

As another embodiment, in addition to a paper container formed by box-making as shown in the figure, a paper bag formed by using thick paper or thin paper, and a wrapping paper used as a packaging material are given. be able to.

FIG. 2 shows a paper material 3 provided with a carbon coating layer 2 on its surface.
The charcoal coating layer 2 is obtained by mixing a powder of charcoal of about 200 μm into an acrylic synthetic resin at a weight ratio of 1 to the acrylic synthetic resin 3, and mixing this into the surface of the paper, for example. It is formed by coating with a thickness of 0.05 mm.
In the case of the above-described paper bag or wrapping paper, a carbon coating layer under the same conditions is applied to one side of the paper material.

The charcoal powder 2 used for forming the charcoal coating layer 2
For a, charcoal, specifically, Bincho charcoal, which is the highest grade of carbon of 95% or more, is used and made into a powder of about 200 microns. The powder 2a of about 200 microns is
The bincho charcoal may be pulverized, but the chips generated when cutting the bincho char into a product length can be used as it is, and the unnecessary chips can be recycled.

The formation of the charcoal coating layer 2 on the paper material 3 is performed by applying a mixture of a molten acrylic resin and charcoal powder 2a to a predetermined thickness by a well-known coating means using a roller or the like. It is sufficient that the coating thickness is 0.05 mm in thickness from the size of the charcoal powder 2a, and the acrylic synthetic resin is, for example, an acrylic-styrene-based copolymer and an alcohol-based solvent. Water and a small amount of additives have been added, and have a role of an adhesive for adhering the charcoal powder 2a to the surface of the paper material 3 and a role of reinforcing and imparting water resistance to the paper material 3.

Here, when the charcoal powder 2a having a size of about 200 μm or more is used, the charcoal grains become large, and the surface of the charcoal coating layer 2 becomes uneven and rough, thereby deteriorating its commercial value. At the same time, when the mixing amount of the charcoal powder 2a exceeds the ratio of 3 to 1 with respect to the acrylic synthetic resin, the mixing amount of the charcoal powder 2a becomes too large, and the separation from the charcoal coating layer 2 is prevented. If it occurs and falls below a ratio of 3: 1, the mixing amount of the charcoal powder 2a decreases, and the effective function of the charcoal decreases.

The coating thickness of the charcoal coating layer 2 is 0.05 m
If it exceeds m, cracks occur in the charcoal-coated layer 2, which is not preferable.

The paper container of the present invention is configured as described above, and the wrapping paper and the paper container 1 are used, for example, for storing, packaging, and packing various foods and fresh foods.

The charcoal-coated layer 2 applied to the inner surface of the paper container 1 has excellent deodorizing, humidity-controlling and gas-adsorbing functions, and the charcoal-coated layer 2 is safe even when food comes into direct contact therewith. Is excellent.

FIG. 3 shows the results of an experiment for confirming the deodorizing effect of the charcoal-coated layer. Using a specimen coated with a charcoal-coated layer on the surface of a cardboard and a specimen consisting of uncoated paper consisting only of cardboard, put both specimens cut to the same size into separate flex samplers. Then, hydrogen sulfide gas was sealed in each flex sampler, the internal pressure was set to atmospheric pressure, and the hydrogen sulfide gas was measured every predetermined time by a gas detection tube method. The specimen coated with the charcoal-coated layer was prepared by applying a powder of charcoal of about 200 μm to the acrylic synthetic resin 3 by one.
, And applied to the surface of the paper with a thickness of 0.05 mm.

As is clear from the above experimental results, the specimen coated with the charcoal-coated layer shows a value several ppm lower than the specimen made of uncoated paper every time elapsed, and the deodorizing effect is low. It turned out to be excellent.

Next, a paper container having an inner surface coated with a charcoal-coated layer and a paper container made of uncoated paper of the same size and shape were prepared, and vegetables and fruits were placed in both containers under the same conditions. And photographed every predetermined time to confirm the difference in freshness. The condition of the charcoal-coated layer applied to the inner surface of the paper container is the same as in the case of the above-described experiment of the deodorizing effect.

According to the results, it was found that the paper container having the inner surface coated with the charcoal-coated layer can maintain the freshness for a longer time than the paper container made of uncoated paper.

This freshness maintenance is obtained by the function of controlling the humidity of the charcoal contained in the charcoal-coated layer and the function of adsorbing spoilage gas such as ethylene gas, thereby maintaining the freshness of foods such as vegetables.
In addition, it was confirmed that the paper material provided with the charcoal coating layer was excellent in water resistance and oil resistance.

Regarding the safety of the paper material coated with the charcoal-coated layer, the analysis values of lead, cadmium, heavy metal, and potassium permanganate consumption were all below the values of Notification No. 20 of the Ministry of Health and Welfare. It was confirmed that it was safe to use for food packaging.

[0032]

As described above, according to the present invention, a charcoal-coated layer coated with powdered charcoal is provided on one surface of the wrapping paper or on the inner surface of the paper container. The container is provided with a deodorizing function and a humidity control function, and is optimally used for storing and packaging various foods and fresh foods, thereby providing a versatile wrapping paper and a paper container.

When a plurality of different foods are stored, as in a lunch box, the foods can be prevented from being smelled by the deodorizing function, and the taste is not reduced. As well as improving the moisture, the moisture control function of the charcoal-coated layer adjusts the moisture in the food and maintains a constant moisture state, thereby maintaining the freshness of fresh food such as vegetables for a long time. Become like

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper container.

FIG. 2 is a cross-sectional view of a cardboard coated with a charcoal coating layer.

FIG. 3 is an explanatory diagram showing the results of an experiment for confirming the deodorizing effect.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper container 2 Charcoal coating layer 2a Charcoal powder 3 Paper material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E060 BC04 BC08 DA23 DA30 EA06 EA12 3E086 AA02 AA21 AD02 BA02 BA14 BA24 BA35 BB02 BB15 CA01 4L055 AG02 AG71 AG96 AH02 AH37 AJ04 EA08 EA16 EA32 FA11 GA05 GA30

Claims (5)

[Claims] 1. A wrapping paper characterized in that a powdered charcoal is applied to the surface of a wrapping paper to provide a charcoal-coated layer. 2. An acrylic synthetic resin having a charcoal coating layer of 20
It is characterized in that charcoal powder of about 0 micron is mixed at a weight ratio of 1 with respect to the acrylic synthetic resin 3 and is applied to the surface of the wrapping paper at a thickness of 0.05 mm. The wrapping paper according to claim 1, wherein 3. A paper container wherein a charcoal-coated layer is provided by applying powdered charcoal to the inner surface of a container formed using paper material. 4. A paper container characterized by using a paper material provided with a charcoal coating layer by applying a charcoal powder on the surface, and using the paper material to form a container with the charcoal coating layer inside. . 5. The method according to claim 5, wherein the charcoal coating layer is made of an acrylic synthetic resin.
A charcoal powder of about 0 μm is mixed in a weight ratio of 1 with respect to the acrylic synthetic resin 3, and this is added to the surface of the paper material in a volume of 0.1 μm.
The paper container according to claim 3, wherein the paper container is formed by coating with a thickness of 05 mm.