JP3017399B2 - Liquid packaging container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid packaging container capable of storing various liquid products such as food and drink products, liquid detergents and the like without causing light deterioration such as fading.

[0002]

2. Description of the Related Art Various types of liquid packaging containers for storing various liquid products such as foods and drinks and liquid detergents have been proposed. , Paper packs, standing pouches and the like are known. For example, as shown in FIG. 1, when the contents C are not stored,
A flat bag-like shape including the two side portions 1, 1 and the bottom portion 2 is formed, and when the contents C are stored, as shown in FIG. Bottom part 2
There are known those which are formed so as to form a three-dimensional shape having a cross-sectional area of a vertical cross section, which is capable of standing up and going upward.

However, the above-mentioned liquid packaging container has a problem that the contents (liquid product) undergo photodeterioration such as fading during long-term storage. Therefore, as a liquid packaging container for preventing light deterioration of the contents, a container in which the inner surface and the like of the container are formed of a metal layer such as an aluminum layer has been proposed.
However, the container is not suitable for storing acidic (corrosive) contents, produces pinholes (poor durability) due to impacts such as dropping and the generation of wrinkles. Difficult to separate layers from other layers,
There are various problems such as unfavorable environmental problems.

A liquid packaging container having a light shielding property without having a metal layer such as an aluminum layer is disclosed in Japanese Utility Model Laid-Open No. 5-544.
5 discloses, although the liquid paper container having a light blocking laminate structure of a paper / Chokuiroso / paper has been proposed, in the liquid packaging cartons, is particularly necessary to light-blocking layer made of a synthetic resin In addition, there is a problem that it is economically disadvantageous because an adhesive for bonding the light-shielding layer and paper is required, and further, it is difficult to separate the light-shielding layer and paper. Because of the difficulty, there are also environmental issues.

[0005] Accordingly, an object of the present invention is to be able to preserve contents without causing photodeterioration such as fading, regardless of the type of the contents, and to be excellent in durability and economical efficiency. An object of the present invention is to provide a liquid packaging container having less environmental problems.

[0006]

The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, a liquid packaging container provided with a colored layer having a gray ink layer can achieve the above object. Was found.

The present invention has been made based on the above findings, and includes a resin sheet layer 21 forming an inner surface of a container ;
The ink provided on the entire outer surface of the resin sheet layer 21 is used.
The surface covering layer 23 is disposed on the surface of the sheet-like material 20 having the coloring layer 22 and the surface covering layer 23 provided on the entire outer surface of the coloring layer 22, and the resin sheet layer 21 is formed.
A liquid packaging container formed to be an inner surface of a container, wherein the colored layer 22 has a hue of 5B over its entire surface.
The present invention provides a liquid packaging container having a gray ink layer 22c having a gray level of 0 to 5P, a chroma of 0, and a lightness of 6 to 7 .

The liquids (contents) that can be packaged and stored by the liquid packaging container of the present invention include various foods and drinks such as soups and juices; various liquid detergents for washing and kitchen use; Various liquid products such as finishing agents are included.

[0009]

In the liquid packaging container according to the present invention, the colored layer provided with the gray ink layer absorbs light having a wavelength that causes photodegradation of the contents, so that light of such a wavelength does not reach the contents. Prevents light degradation of contents during storage.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid packaging container of the present invention will be described in detail with reference to the drawings, and will be specifically described with reference to embodiments.

FIGS. 2 to 4 show a standing pouch as an embodiment of the liquid packaging container of the present invention.
FIG. 2 is a perspective view showing the appearance of the standing pouch as one embodiment of the liquid packaging container of the present invention in a state in which the contents are stored, and FIG. 3 is an X-ray of the standing pouch shown in FIG. FIG. 4 is a cross-sectional view taken along an X-ray arrow, and FIG.
FIG. 4 is an enlarged sectional view of a part Y in FIG. 3.

As shown in FIGS. 2 to 4, a standing pouch, which is a liquid packaging container of this embodiment, includes a resin sheet layer 21, a colored layer 22 provided on the outer surface of the resin sheet layer 21, and It is formed by arranging the surface coating layer 23 on the surface by the sheet-like material 20 having the surface coating layer 23 provided on the outer surface of the coloring layer 22, and the coloring layer 22 has the gray ink layer 22c. .

The standing pouch of this embodiment will be described in more detail. As shown in FIGS. 2 and 3, the standing pouch of this embodiment has two side surfaces 1, 1 and a bottom surface 2 having a space 3 below. And is formed so as to form a three-dimensional shape in which the cross-sectional area of the cross section decreases as it goes up and goes upward.

The standing pouch is composed of a sheet-like material (film constituting a standing pouch) 20 whose surface can be subjected to printing or the like. The bottom surface 2 is folded and sandwiched, and the two side surfaces 1 and 1 are sealed to each other at their side edges.
The two side portions 1 and 1 and the bottom portion 2 are sealed at their side edges and lower end edge, respectively. The entire shape of the standing pouch is a flat bag shape in which the bottom portion 2 is folded in two when the contents C are not stored. 11, the upper end portion 11 is sealed and the upper end portion 11 is sealed). The cross section gradually becomes flat, and the upper end portion 11 becomes a completely flat three-dimensional shape. The standing pouch is erected at the lowermost annular lower peripheral portion 4 of the side surfaces 1 and 1 and the bottom surface 2. Such a configuration is similar to that of a conventional product.

Further, in the standing pouch of the present embodiment, the upper portion A at the time of standing up in which the contents C are stored.
Is bent at a bent portion 10 parallel to the cross-sectional direction, and one side portion 1 of the upper portion A is attached to the one side portion 1 of a lower portion B of the bent portion 10 by an adhesive portion 5. It is designed to be detachably fixed. In the present embodiment, the adhesive portion 5 is provided on the upper end portion 1 of one side surface portion 1 of the upper portion A.
1 and is provided continuously along the upper end portion 11.

When the standing pouch is used, the upper end portion 11 is sealed after the contents C are received from the upper end portion 11, and the upper portion A is bent downward at the bent portion 10. Then, the upper portion A is fixed to the lower portion B via the adhesive portion 5.

When the standing pouch containing the contents C is opened and used, the upper portion A is moved downward in the direction of arrow P shown in FIG. After peeling off from the part B, the upper end part 11 is cut out and opened, and the standing pouch is inclined to discharge the contents C. When the content C is left, the upper portion A is fixed to the lower portion B again by the adhesive portion 5, and the content C is stored.

As shown in FIG. 4, the standing pouch of this embodiment has a resin sheet layer 21 forming the inner surface of the container, and a colored layer 22 provided on the entire outer surface of the resin sheet layer 21. And a surface covering layer 23 provided on the entire outer surface of the coloring layer 22 (in the present embodiment, a film), thereby forming the surface covering layer 23.
On the surface and the resin sheet layer 21 is formed to be the inner surface of the container (the surface in contact with the contents C). The coloring layer 22 has a gray ink layer 22 on its entire surface.
c, the color ink layer 22a and the white ink layer 22b
And the gray ink layer 22c.

Examples of the material for forming the resin sheet layer 21 include the following resins and the like. The resin sheet layer 21 may be a single layer or a laminate of two or more layers made of the following resins alone or as a mixture. It can be formed by the body. LLDPE (linear low density polyethylene),
LDPE (low density polyethylene), CPP (unstretched polypropylene) and the like.

The thickness of the resin sheet layer 21 is 5
The thickness is preferably from 0 to 150 μm.

In the present invention, examples of the color ink forming the color ink layer 22a include gravure ink and offset ink, and the color of the color ink is not particularly limited, but may be white. Examples of the white ink layer forming the white ink layer 22b include white gravure ink and offset ink.

The gray ink for forming the gray ink layer 22c is a gray gravure ink.
Offset ink and the like can be mentioned. The hue of the gray ink layer 22c is 5B to 5P, and the saturation is 0.
And the brightness is 6-7.

The color layer 22 has a thickness of 4-18.
μm, and the gray ink layer 22
The thickness of c is 2 to 6 μm, the thickness of the white ink layer 22b is 1 to 6 μm, and the thickness of the color ink layer 22a is 1 to 6 μm.
It is preferably 6 μm.

As the material for forming the surface coating layer 23, the following materials can be preferably exemplified. The surface coating layer 23 is a single layer or a double layer made of a single or a mixture of the following materials. It can be formed by the above laminate. Polyethylene terephthalate (PET), stretched nylon (ONY), stretched polypropylene (OPP) and the like.

The thickness of the outer surface coating layer is 5 to 30 μm.
It is preferred that

The sheet-like material 20 can be easily manufactured by a known manufacturing method or the like.
It can be manufactured by a T-die method, a co-extrusion laminating method, an inflation method, a tandem lamination, or the like.

The standing pouch of this embodiment can be easily manufactured by a generally known manufacturing method.

As described above, the standing pouch according to the present embodiment is configured so that the coloring layer has the gray ink layer, and therefore, the gray ink layer absorbs light having a wavelength at which the content is lightly degraded. There is no light deterioration of the contents during storage.

The standing pouch according to the present embodiment can be compacted in its entire shape when the contents C are accommodated. can do. In the standing pouch of this embodiment, when the contents C are stored, the upper portion A is bent so that the one side portion 1 of the upper portion A is connected to the one side portion 1 of the lower portion B.
By fixing the standing pouch, the surface of the standing pouch is tightened, so that the surface does not wrinkle and the appearance during display can be improved. Further, the standing pouch according to the present embodiment is configured such that the one side portion 1 of the upper portion A can be detachably attached to the one side portion 1 of the lower portion B when the contents C are not used up at one time by opening the package. , The upper end 11 does not remain opened, and the storage of the contents C is not hindered.

The present invention is not limited to the above embodiments. For example , in addition to the resin sheet layer, the coloring layer and the surface coating layer, a barrier layer, a pinhole-resistant layer,
A tear inducing layer or the like may be provided. The position where the adhesive portion is provided may be a lower portion instead of an upper portion. Further, in the above embodiment, one side surface of the upper portion is detachably fixed to the one side portion of the lower portion using the adhesive portion, but the attachment / detachment mechanism is not limited. Other points can be appropriately changed without departing from the spirit of the present invention.

Further, in the above embodiment, the standing pouch was described as an example of the liquid packaging container of the present invention. However, the liquid packaging container of the present invention is not limited to the standing pouch. Paper packs,
Various types of film packaging and the like can also be used, and at this time, except for having the resin sheet layer, the coloring layer, and the surface coating layer, each generally known configuration can be adopted without particular limitation. .

Next, the present invention will be specifically described with reference to examples. Example 1 After forming a resin sheet layer 21 with OPP 20 μm / LDDPE 130 μm, the resin sheet layer 2
On 1, sequentially apply 3 μm of gray gravure ink, 3 μm of white gravure ink, and 3 μm of white gravure ink,
The coloring layer 22 including the gray ink layer 22c, the white ink layer 22b, and the color ink layer 22a was formed. Next, ONY 15 μm was coated on the colored layer 22 to form a surface coating layer 23, and a sheet 20 having the configuration shown in FIG. 4 was obtained. Using the obtained sheet-like material 20, a standing pouch as a liquid packaging container of the present invention shown in FIGS. 1 to 3 was prepared. At this time, the ink composition of the coloring layer 22 in the sheet material 20 is white / white / gray (gray density 2).
%), And the light transmittance of the sheet material at 200 to 800 nm was 13.1%. The hue, saturation and lightness of the gray ink layer were respectively within the above-mentioned ranges.

As a comparative symmetry, a film (ink composition; white / white) having the same structure as the sheet 20 except that the gray ink layer 22c was not provided was prepared. The light transmittance at 800 nm was measured and found to be 27.5%. The film 20 used in the liquid packaging container of the present invention had better light-shielding properties than the conventional film. It turned out that.

Further, a film 20 having a gray density increased from 2% to 3% is prepared.
When the light transmittance at 00 to 800 nm was measured, it was improved from 13.1% to 11.1%. That is, it was also found that the light shielding property can be further improved by adjusting the gray density.

[0035]

According to the present invention, the liquid packaging container of the present invention can be stored regardless of the kind of the content without causing light deterioration such as discoloration, and has excellent durability and economical efficiency. It is also excellent and has few environmental problems. For details,
The liquid packaging container of the present invention has a light shielding property by a gray ink layer that can be formed by printing, so that it is economical and the physical properties of the sheet-shaped material are not significantly changed, and a printing base material. Resin sheet layer (PE
T, NY, etc.) makes it possible to easily impart light-shielding properties to the sheet-like material constituting the container. It is not necessary to separate each of the above-mentioned layers in the sheet-like material, and recycling is possible. The loss of the easy-cut property can be prevented by imparting light-blocking properties with the ink forming the colored layer, and the color can be changed by printing colors having various wavelength transmittances according to the degree of fading of the contents. It can form an ink layer and does not damage the product image. It does not use a metal layer such as aluminum, so it can be used for packaging of corrosive contents and is effective on environmental issues. Has the effect of

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a state in which the contents of a conventionally used standing pouch are stored.

FIG. 2 is a perspective view showing an appearance of a standing pouch as an embodiment of the liquid packaging container of the present invention in a state in which contents are stored.

FIG. 3 shows the X of the standing pouch shown in FIG. 2;
-It is an X-ray arrow sectional drawing.

FIG. 4 is an enlarged sectional view of a portion Y in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side surface part 2 Bottom part 3 Space A Upper part B Lower part C Contents 20 Sheet material 21 Resin sheet layer 22 Color layer 22a Color ink layer 22b White ink layer 22c Gray ink layer 23 Surface coating layer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-148816 (JP, A) JP-A-6-250343 (JP, A) Japanese Utility Model 1983-19973 (JP, U) Field (Int.Cl. ⁷ , DB name) B65D 81/30 B32B 27/10 B65D 30/02

Claims (1)

(57) [Claims] 1. A resin sheet layer 21 forming an inner surface of a container.
And an ink provided on the entire outer surface of the resin sheet layer 21
The surface covering layer 23 is disposed on the surface of the resin sheet layer 20 by a sheet-like material 20 having a coloring layer 22 formed by the above and a surface covering layer 23 provided on the entire outer surface of the coloring layer 22.
21 is a liquid packaging container formed so as to be the inner surface of the container, wherein the colored layer 22 has a hue of 5B to 5P,
A liquid packaging container having a gray ink layer 22c having a degree of 0 and a lightness of 6 to 7 .