JP2001225834A - Paper container for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container for liquid, onto which an indication can be applied in a manner similar to a conventional paper container for liquid and in which color development in a regenerated pulp can be easily reduced. SOLUTION: In the paper container for liquid composed of a pack body comprising a pack material composed of a paper base material and a waterproof film adhered to the base material, and an indicating sheet, the pack body is wrapped in the indicating sheet so that the indicating sheet can be separated from the pack body when the container is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a paper container for liquids.

[0002]

2. Description of the Related Art As a container for distributing and selling liquids such as various foods and beverages such as juice and milk, a liquid paper container mainly composed of a paper base material is used. As the liquid paper container, generally, a pack body mainly composed of a pack material composed of a paper base material and a film bonded to both surfaces thereof for waterproofing, strength improvement, and the like is used. .

[0003] In such a liquid paper container, it is required to display on its surface various items necessary for distribution and sales, such as a product name, a description of the content of the product, and a design for promoting sales. . Such items are usually formed by pasting a film to a paper base material in advance to form a pack material, and printing on the surface by offset printing, gravure printing, flexo printing, etc., and further the printing surface is on the outside. By configuring the paper container, it is displayed on the surface of the paper container. In addition, items determined on the day of manufacture, such as the expiration date, are sometimes indicated by engraving on an outer film after filling a paper container with food or drink.

[0004] The paper base material of such a liquid paper container is required to have hygiene, rigidity, strength and the like.
In most cases, it is made from high quality paperboard of 300 g / m ² or more per square meter made from long fibers of North American NBKP that combine these properties. Therefore, from the used paper container, high-quality recycled pulp that can be used for substituting virgin pulp for the surface layer of white paperboard, pulp for tissue paper, and the like can be collected, and is highly valuable as a resource.

[0005] The recycled pulp recovered as a white pulp has high commercial value. The collection of recycled pulp from the used liquid paper container includes dusting of the paper container, dust removal by screen dust removal to remove films, etc.
However, at this time, the color of the display printed on the liquid paper container cannot be completely removed, and the recovered recycled pulp may be colored or colored foreign matter may be mixed in the recycled pulp. There is a problem that you do. In particular,
The printing ink printed on the film is eluted in the disintegration step and dyes the pulp fibers, so that the recovered recycled pulp is colored. In addition, since the film on which the printing ink is adhered becomes crushed pieces, it is not completely removed in the screen dusting step, and thus, the collected recycled pulp contains colored foreign matter. It is extremely difficult to completely avoid such a phenomenon in a normal recovery process, which is a problem in reusing a liquid paper container.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid paper container which can display on its surface in the same manner as a conventional liquid paper container and can easily reduce coloring of recycled pulp. Is to do.

[0007]

According to the present invention, there is provided a pack body containing a pack material comprising a paper base material and a waterproof film bonded thereto, and a liquid paper container containing a display sheet, wherein the liquid A liquid paper container is provided, wherein the display sheet is wrapped around the pack so that the display sheet can be separated from the pack when collecting the paper container.

Further, according to the present invention, there is provided the liquid paper container, wherein the waterproof film is substantially colorless or white.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The liquid paper container of the present invention includes a pack body containing a pack material composed of a paper base material and a waterproof film bonded thereto. Examples of the paper substrate include, but are not particularly limited to, high-grade paperboard made from long fibers of NBKP produced in North America, various types of materials that have both sanitary properties, rigidity, strength, etc., and that are required to be recovered and made into recycled pulp. What consists of paper can be used.

As the waterproof film, various plastic films used in conventional liquid paper containers can be used. Specifically, for example, a polyethylene film and the like can be mentioned.

In the liquid paper container of the present invention, the waterproof film is preferably substantially colorless or white. Substantially colorless or white means that, even when mixed with recycled pulp upon collection of the liquid paper container, does not substantially affect the color of the recycled pulp recovered as white pulp, transparent, substantially white, Alternatively, it means that it has a color such as translucent white and does not contain any color other than white, or contains only a color that does not affect the color of recycled pulp recovered as white pulp.

The paper base material and the waterproof film can be bonded together in the same manner as in the manufacture of a pack material constituting a conventional liquid paper container to form a pack material. Specifically, for example, a method in which the material of the molten waterproof film is developed into a film-like form and then bonded by being combined with a paper base before coagulation, or the waterproof film and the paper base are bonded with an adhesive material. A pack material can be obtained by a combining method or the like.

The waterproof film is usually bonded to both sides of the paper substrate, but may be bonded only to the paper substrate surface located on the inner surface of the pack when the pack is formed. .

The packing material is the same as a conventional liquid paper container, and is made of a tetrahedron, a rectangular parallelepiped, a cylinder, a prism, a polygon, and the like.
A pack body can be formed by combining these shapes or in any other form. The pack body may have a structure formed from a material other than the pack material, such as a spout, if necessary.

The liquid container of the present invention includes a display sheet in addition to the pack. The display sheet is a product name,
Refers to a sheet that can display items that are required to be displayed in distribution and sales, such as descriptions of contents (usage method, components, expiration dates, etc.), designs, and the like.

As the display sheet, a substance such as a plastic film, paper, paperboard, nonwoven fabric, aluminum foil, or a combination thereof can be used.

The thickness of the display sheet is not particularly limited and can be appropriately selected according to the material of the sheet, the method of encasing the pack, and the like.
m.

The display sheet encloses the pack so that the display sheet can be separated from the pack when the liquid paper container is collected. In particular, at the stage of distribution, sale, consumption, etc. of the liquid paper container, the display sheet does not separate from the pack body, but in the case of collection, the display sheet can be easily separated from the pack body in a wrapping mode. preferable. Specifically, for example, adhesion,
The display sheet can be adhered to the pack body by a laminating means or the like and encapsulated. Also, the display sheet is brought into close contact with the pack body by means such as shrinking and winding,
Can be encapsulated. Also, these can be combined and encapsulated. The display sheet may cover the whole of the pack body, or may cover only a part of the pack body.

More specifically, for example, as shown in FIG. 1A, the entire pack 1 having a rectangular parallelepiped shape and a top portion sealed in the shape of a gable is applied to the display sheet 2 by means such as shrinking.
1B, or a form in which only the side surface is wrapped by the display sheet 2 as shown in FIG. 1B. Also, as shown in FIG. 2A,
A form in which the entire pack body 1 in the shape of a rectangular parallelepiped is wrapped by wrapping it with the display sheet 2 by means such as shrinking;
Alternatively, as shown in FIG. 2B, a form in which only the side surface is wrapped by the display sheet 2 and the like can be cited.

The display sheet may have a color. The method of coloring the display sheet is not particularly limited.Specifically, for example, before or after the encapsulation step, offset printing, gravure printing, printing such as flexo printing, or various types of coloring by a method such as engraving. Can be applied.

The liquid paper container of the present invention can be subjected to a recovery step after the contents are poured out for use. In this step, the pack body can be separated from the display sheet by a method such as peeling the display sheet from the pack body, pulling out the pack body from the display sheet, or tearing the display sheet. Further, the separated pulp alone is subjected to defibration, dust removal by screen dust removal for removing a waterproof film and the like, and subjected to a normal paper container collection process such as deinking to recover recycled pulp. it can.
In this case, even if the steps of defibration, dust removal, deinking and the like are simple, a white recycled pulp having high commercial value can be easily obtained.

[0022]

Since the liquid paper container of the present invention has a specific pack and a display sheet for enclosing the pack in a specific mode, the pulp contained therein is not easily colored, and no colored foreign matter is mixed. , And the recycling cost can be reduced and the yield can be improved. Therefore, it is useful as a paper container in which resources can be effectively and simply reused.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the relationship between a pack and a display sheet in a liquid paper container of the present invention.

FIG. 2 is a perspective view showing another example of the relationship between the pack and the display sheet in the liquid paper container of the present invention.

[Explanation of symbols]

 1: Pack body 2: Display sheet

Claims (2)

[Claims] 1. A pack containing a packing material consisting of a paper base material and a waterproof film bonded thereto, and a liquid paper container including a display sheet, wherein the display sheet is used for collecting the liquid paper container. A liquid paper container, wherein the display sheet encloses the pack so as to be separable from the pack. 2. The liquid paper container according to claim 1, wherein the waterproof film is substantially colorless or white.