JP2002037271A - Liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid container wherein volume reduction of the container is excellent in pouring out contents, little residual of the contents is left, reduction in quantity of a used material is possible, the container is easy to dispose of, and a manufacturing cost is relatively inexpensive. SOLUTION: The liquid container 100 comprising a front peripheral wall 110, a rear peripheral wall 120, an upper surface peripheral wall 130 and a lower surface peripheral wall 140 exhibits an approximately paralellopiped box shape when the container is filled with the contents. A pour-out port 180 is provided on one of the peripheral walls, and as the contents are poured out of the pour-out port, a predetermined peripheral wall surface deforms inward to cause a volume of the container to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention contains high-viscosity liquids such as ink, mayonnaise, ketchup and sauce.
The present invention relates to a liquid container that can be suitably used as a cartridge-type container and that discharges contents using a self-priming machine.

[0002]

2. Description of the Related Art Conventionally, as a container for accommodating a high-viscosity liquid content and sucking out the content, for example, Japanese Patent Laid-Open No.
There is a so-called bag-in-box described in Japanese Patent No. 211273. In this bag-in-box, a plastic inner bag is housed in an outer box made of a rigid material such as paperboard or cardboard, and a high-viscosity liquid such as ink as a content is housed in the inner bag. It was made. The contents are suctioned and discharged through a spout port attached to the inner bag. In addition, the spout port attached to the inner bag was provided so as to protrude from an opening provided in the outer box or was provided so as to be protrudable.

[0003] Further, the container described in Japanese Patent Application Laid-Open No. Hei 6-212273 makes it easy to take out the contents contained in the inner bag, and finally to reduce the contents remaining in the container. Only a part of the inner bag was bonded and fixed to the inner surface of the outer box.

[0004]

However, in the above-described bag-in-box, it is necessary to set up the inner bag and the outer box which are separately manufactured, and when the inner bag is partially adhered to the inner surface of the outer box. Have problems such as positioning, the number of processes is increased, and the manufacturing cost is not economical.

[0005] When the contents are sucked and discharged, the inner bag is deformed by the volume of the discharged contents, but due to the deformation of the inner bag near the outlet, the flow path of the contents is reduced. In some cases, the container was blocked, and there was a variation in the dispensing efficiency of the contents and an increase in the remaining amount. In addition, although the volume of the inner bag is reduced as the contents are poured out, the container itself does not reduce the volume because the outer box is provided outside the inner bag. Also, in order to separate and collect when discarding after use,
It was troublesome to open the outer box and take out the inner bag partially adhered to the inner surface of the outer box.

The present invention solves the above-mentioned problem of the conventional liquid container filled with a high-viscosity content. The present invention is excellent in reducing the volume of a container accompanying the pouring of the content, and is capable of retaining the content. An object of the present invention is to provide a liquid container which is extremely small in amount, can reduce the amount of materials used, can be easily disposed of, and has a relatively low production cost.

[0007]

That is, the first aspect of the present invention is as follows.
The invention of the present invention, in a state where the contents are filled, forms a substantially rectangular parallelepiped box shape, a spout is provided on the peripheral wall on one side thereof,
The liquid container is characterized in that a predetermined peripheral wall surface is deformed inward as the content is poured out from the spout, thereby reducing the volume of the container.

According to a second aspect of the present invention, the peripheral wall of the liquid container comprises a front peripheral wall film having a spout, a rear peripheral wall film, an upper peripheral wall film, and a lower peripheral wall film. While the front-side peripheral wall film and the back-side peripheral wall film are overlapped, the upper-side peripheral wall film in which the center is folded in two at the lower part is hardly heat-sealed, and the upper-side peripheral wall film is sandwiched in the upper part, and the center is directed upward. A lower surface side peripheral film that is almost the same in length in the front-rear direction as the upper surface peripheral wall film folded in half is hardly heat-sealed, and a lower surface side peripheral film is sandwiched at a lower portion with a gap between the upper surface peripheral film and the four-sided peripheral portion. The liquid container according to the first invention, wherein the peripheral wall films are connected by forming a fusion portion by heat fusion.

Next, a third invention of the present invention is directed to a method of forming a front peripheral wall film and a rear peripheral film at a central portion of a left end and a right end of a fusion portion provided on the four sides. From the boundary portion between the fusion portion, the fusion portion of the front peripheral wall film, the upper peripheral film, and the rear peripheral film of the upper portion, to the fusion portion on the upper end side of the fusion portion provided on the four-sided peripheral portion. 30 ~
The front side peripheral wall film and the back side peripheral wall film of the central part of the left end side and the right end side of the fusion part provided with the fusion part provided continuously at an angle range of 60 degrees and the fusion part provided on the four-sided peripheral part are provided. From the boundary portion of the fusion portion, the fusion portion of the lower side peripheral wall film and the front side peripheral wall film of the lower portion, to the fusion portion on the lower end side of the fusion portion provided on the four-sided peripheral portion. 3
The liquid container according to the second invention, wherein a continuous fused portion is provided in an angle range of 0 to 60 degrees.

Next, a fourth invention of the present invention is characterized in that a partial through-hole is provided in the upper peripheral wall film and the lower peripheral wall film in which the left end side and right end side fusion parts are overlapped. The liquid container according to the third invention.

Next, a fifth invention of the present invention is directed to a method of forming a front peripheral wall film and a rear peripheral wall film at the center of the left and right ends of the fusion parts provided at the four-sided peripheral parts. From the boundary portion between the fusion portion, the fusion portion of the front peripheral wall film, the upper peripheral film, and the rear peripheral film of the upper portion, to the fusion portion on the upper end side of the fusion portion provided on the four-sided peripheral portion. 30 ~
A continuous oblique fusion portion is provided in an angle range of 60 degrees, an upper portion is cut off from an upper end of the oblique fusion portion, and fusion is performed on the left end side and the right end side of the fusion portion provided on the four sides. From the boundary between the fused portion between the front side peripheral wall film and the back side peripheral wall film at the center of the portion and the fused portion between the front side peripheral wall film, the lower side peripheral wall film and the back side peripheral wall film at the lower portion. 3 to the fused part on the lower end side of the fused part provided in the peripheral part
Provide a continuous oblique fusion part in the angle range of 0 to 60 degrees,
The liquid container according to the second invention, wherein a lower part is cut off from a lower end of the oblique fusion part.

In a sixth aspect of the present invention, the rigidity of the front side peripheral wall film is higher than the rigidity of the back side peripheral wall film, the upper side peripheral wall film, and the lower side peripheral wall film. A liquid container according to a fifth aspect.

Next, a seventh aspect of the present invention is to use a composite material having a paper layer (outside) / film layer (inside) structure for the front side peripheral wall film, and folding the paper layer of the composite material. The liquid container according to any one of claims 2 to 6, wherein a fold line processing for facilitating bending is performed at the position.

In an eighth aspect of the present invention, the spout port is fixed by inserting a mouth member through an opening provided at a predetermined position of the front side peripheral wall film, and the inside of the container of the mouth member is provided. The liquid container according to any one of the first to seventh inventions, wherein the liquid container has projections and depressions on a side surface.

[0015]

Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the liquid container (100) of the present invention forms a substantially rectangular parallelepiped box when the container is fully filled with the contents.
A spout (180) is protruded from a predetermined peripheral wall surface, and filling and pouring of contents are performed from the spout. And, as the contents are poured out from the spout,
The predetermined peripheral wall surface is deformed inward to reduce the volume of the container.

A liquid container (10) according to an embodiment of the present invention
As shown in FIG. 1, the peripheral wall of 0) is a spout (180).
Front side peripheral wall (110) film, rear side peripheral wall (120) film, top side peripheral wall (13)
0) film, and a lower peripheral wall (140) film. The method of manufacturing this container is shown in FIG.
As shown in FIG. 2 (b) or FIG. 6 (b), the front side peripheral wall (110) film and the back side peripheral wall (120) film having the same dimensions are overlapped, and the front side peripheral wall film and the back side peripheral wall film are In between, the upper peripheral side wall (130) film whose center is folded in half and whose upper surface is difficult to heat seal is sandwiched in the upper part, and the upper peripheral wall film whose center is folded in half and the length in the front-rear direction is A lower side peripheral wall (140) film having the same size that is difficult to heat-seal is sandwiched between the lower peripheral side film (140) and the upper peripheral wall film with a predetermined gap therebetween.
And (b), a heat-sealing method or the like is applied to the four peripheral edges by a heat-sealing method or the like to form a fused portion (151, 152, 1).
53, 154, 155, 156) to connect the respective peripheral wall films. In the container of the present embodiment, the contents are filled from the spout with the front side peripheral wall facing upward, distributed and stored in this state, and when the contents are poured out, as shown in FIG. Usually, the front side peripheral wall (110) is used with the front sideways.

A liquid container (100) according to another embodiment of the present invention has a structure as shown in FIG. 3 (a) or (b).
Fused parts (151, 152, 153,
154, 155, 156), a fusion zone (151b, 152b) between the front side peripheral wall film and the rear side peripheral wall film at the center of the fusion zone (151, 152) on the left end side and right end side.
And a fused portion (151a, 151a) of the upper front side peripheral wall film, the upper side peripheral wall film, and the rear side peripheral wall film.
The oblique fusion parts (161, 162, 165) continuous in the angle range of 30 to 60 degrees from the boundary part with a) to the fusion parts (153, 155) on the upper end side of the fusion parts provided on the four-sided peripheral part. ,
166), and the fused portion (1
51, 152, 153, 154, 155, 156), a fusion zone (151b, 152b) between the front peripheral wall film and the rear peripheral wall film at the center of the fusion zone (151, 152) on the left and right ends. And a lower end side of the fused portion provided on the four peripheral edges from the boundary between the fused portions (151c, 152c) of the lower front side peripheral film and the lower side peripheral wall film at the lower portion. (154, 156) obliquely fused portions (16
3, 164, 167, 168). The above-mentioned oblique fusion parts (161, 162, 163, 164,
165, 166, 167, 168) of the present embodiment, when the contents are filled, the contents do not enter into the corners of the fusion parts provided on the four-sided peripheral portions, and the container is smooth. It is easy to stand up into a rectangular parallelepiped box shape, and the remaining amount of unfillable contents is extremely small.

Further, as shown in FIG. 4, the left end side and right end side fused portions (151a, 152c, 152a,
When partial through holes (171, 172, 173, 174) are provided in the superposed upper peripheral wall (130) film and lower peripheral wall (140) film of 152c), the front peripheral wall ( 110) When the film and the back side peripheral wall (not shown) film are fused, the left end side and right end side welded portions increase in strength, and when the contents are filled,
Further, the container can be easily raised into a rectangular parallelepiped box shape.

As shown in FIG. 7 (a), a liquid container (100) according to another embodiment of the present invention has fused portions (151, 152, 153, 154 and Fused portions (151b, 152b) of the front side peripheral wall film and the back side peripheral wall film at the center of the left end side and right end side fusion portions (151, 152) (not shown).
And a fused portion (151a, 151a) of the upper front side peripheral wall film, the upper side peripheral wall film, and the rear side peripheral wall film.
The oblique fusion parts (161, 162, shown in the figure) that are continuous at an angle range of 30 to 60 degrees from the boundary part with a) to the fusion parts (153, 155) on the upper end side of the fusion parts provided on the four-sided peripheral part. 165, 166), the upper part is cut off from the upper end of the oblique fusion part, and the fusion parts (151, 152, 153, 154 and 1 not shown)
55, 156) on the left end side and the right end side (151, 156).
152), a fused portion (151b, 152b) between the front side peripheral wall film and the back side peripheral wall film at the center, and a fused portion between the front side peripheral wall film, the lower side peripheral wall film, and the back side peripheral wall film at the lower portion ( 151c, 152c), the lower end side of the fused portion (1
54, 156) at an angle range of 30 to 60 degrees and obliquely welded portions (163, 164 and 167, 1 not shown)
68), and the lower part is cut off from the lower end of the oblique fusion part. When the liquid container (100) is filled with the contents, it becomes a box shape in which the upper and lower corners on both sides of the rectangular parallelepiped are obliquely cut as shown in FIG. 7 (b). Since there are no unnecessary corners, when the contents are filled, the container stands up smoothly into a rectangular parallelepiped box shape.

In a liquid container according to another embodiment of the present invention, the rigidity of the front side peripheral wall film is higher than the rigidity of the back side peripheral wall film, the upper side peripheral wall film, and the lower side peripheral wall film. This liquid container, when pouring out the filled content, as the content is poured out, the back side peripheral wall film, the upper side peripheral wall film, the lower side peripheral wall film having lower rigidity than the front side peripheral wall, the lower side peripheral wall film is placed in the container. It is deformed by decompression.

As shown in FIG. 6B, a liquid container according to another embodiment of the present invention has a front side peripheral wall (110).
On the film, [inside] film layer (111) / paper layer (1
12) A composite material having an [outside] configuration is used.
As shown in (a), the front side peripheral wall (110) is provided with a fold line (113, 1) such as a crease or a perforation at the bending position of the paper layer of the composite material of the film to facilitate bending.
14). For example, FIG. 9A shows the liquid container (10) of the present embodiment when the contents are filled.
FIG. 9B is a plan view of FIG. 9B. From this state, when the contents are completely suctioned out, as shown in the plan view of FIG. A rear side peripheral wall (120), an upper side peripheral wall (130), and a lower side peripheral wall (not shown) are folded inside the rear surface of the peripheral wall (110). Thus, the area of the front container is the same when the contents are full and when the contents are completely poured. As shown in FIG. 5, the effect of the fold line provided on the paper layer is remarkable when the container (100) is housed in the holder (200). Meanwhile, the front side peripheral wall film,
Liquid container (100) in which the rigidity of the back side peripheral wall film, the top side peripheral wall film, and the lower side peripheral wall film is the same, and the folding position of the front side peripheral wall film is not subjected to crease line processing
When the contents are full, the area of the front container is small as shown in FIG. 8 (a), but when the contents are completely poured out, as shown in FIG. The area of the container increases. When using a composite material in which a paper layer is provided as the outermost layer on the front side peripheral wall, the paper has excellent printability, so it is easy to beautifully print characters and pictures on the surface of the front side peripheral wall, and because of the rigidity of the paper, In addition, the ease of setting on a printing machine or a laminating machine is improved.

In the liquid container according to another embodiment of the present invention, as shown in FIG. 6B, a spout (180) is provided at a predetermined position on the front side peripheral wall (110) film. The mouth member is inserted into the opening and fixed, and a projection (181) is provided on the inner side surface of the container to make the mouth uneven. The projections are provided to prevent the film forming the container from being pulled by the flow of the high-viscosity contents when the contents are suctioned and poured out, so that the mouth is not blocked.

The films used for the front side peripheral wall, the back side peripheral wall, the upper side peripheral wall, and the lower side peripheral wall of the liquid container of the present invention have different lamination structures and rigidities depending on the purpose of use of the container. However, for example, a silicon oxide vapor deposition film (12 μm) / nylon (15 μm) / polyethylene (100 μm) configuration, a silicon oxide vapor deposition film (12 μm)
m) / polyethylene (120 μm), polyethylene terephthalate (12 μm) / barrier nylon (15 μm)
m) / polyethylene (80 μm) configuration, laminated film of polyethylene terephthalate (12 μm) / nylon (15 μm) / ethylene / vinyl alcohol copolymer (15 μm) / polyethylene (80 μm) configuration. Each peripheral wall film has a laminated structure including a barrier material layer as necessary, and the front peripheral wall film is provided with a paper layer on the outside as necessary to provide rigidity. This paper is
Those with 50 to 800 g / m ² exert their functions,
Those having a range of 0 to 400 g / m ² are preferable. The rigidity of the film itself is adjusted by the total thickness of the film and the rigidity of each layer. The stiffness of the film used for the liquid container of the present invention is preferably 20 to 500 mN / 15 mm wide as measured by a loop stiffness measuring instrument.
The best function is exhibited at a width of 0 to 250 mN / 15 mm. Further, the rigidity of the paper used for the liquid container of the present invention is 3 to 60 mN · m, and the rigidity of the paper is 5 to 20 mN.
Those having a range of N · m are preferred in terms of productivity and cost.

The liquid container of the present invention is a primary container comprising a front side peripheral wall, a back side peripheral wall, an upper side peripheral wall, and a lower side peripheral wall as described above. Since the inner bag is not housed therein, the amount of materials used is small, the manufacturing process can be simplified, the manufacturing cost is low, and the empty container after use is easily disposed of.

[0025]

EXAMPLE A paper (basis weight 210 g / m2) was placed on the outer peripheral wall of a laminated film of [outside] silicon oxide vapor-deposited film (12 μm) / polyethylene (120 μm) [inside].
² ) Using a composite material bonded together, the outer peripheral wall, upper peripheral wall and lower peripheral wall are [outside] silicon oxide evaporated film (12 μm) / polyethylene (120 μm)
[Inside] Using a laminated film with a composition, the content is 98
5ml, box-shaped outer dimension is 100mm
A (width) × 110 mm (height) × 100 mm (depth) liquid container of this example was produced. The paper layer on the surface of the front side peripheral wall was provided with perforations at bending positions. After the container was filled with the ink as the content, all the ink in the container was suctioned out from a spout provided on the front side peripheral wall film. The back side peripheral wall, the upper side peripheral wall, and the lower side peripheral wall were folded into the inside of the back side of the front side peripheral wall with the ejection of the ink, and the volume of the container was significantly reduced. The residual ratio of the ink in the container was 1.69%. In addition, the waist strength of the laminated film was 90 mN / 15 mm width, and the rigidity of the paper was 12 mN · m.

[0026]

The liquid container according to the present invention comprises a front side peripheral wall, a back side peripheral wall, an upper side peripheral wall, and a lower side peripheral wall, and has a substantially rectangular parallelepiped box shape in a state where the contents are fully filled. Thus, when the contents are sucked and discharged from the spout port, the container is excellent in reducing the volume of the containers accompanying the discharging of the contents, and the remaining amount of the contents is extremely small.

Further, since the liquid container of the present invention is a primary container, the amount of material used is smaller than that of the conventional bag-in-box, and the empty container after use can be easily disposed of, and the manufacturing cost can be reduced. It is an inexpensive container.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the appearance of a liquid container according to an embodiment of the present invention when the contents are fully filled.

FIG. 2 is an explanatory view showing a method of manufacturing a liquid container according to one embodiment of the present invention, and FIG. 2 (a) shows a fused portion when four peripheral wall films are overlapped and fused. It is explanatory drawing seen from the front side peripheral wall film, and (b) is explanatory drawing seen from the back side peripheral wall film.

3A and 3B are explanatory views showing a method of manufacturing a liquid container according to an embodiment of the present invention, and FIG. 3A shows a fused portion when four peripheral wall films are overlapped and fused. It is explanatory drawing seen from the front side peripheral wall film, and (b) is explanatory drawing seen from the back side peripheral wall film.

FIG. 4 is an explanatory view showing a method of manufacturing the liquid container according to one embodiment of the present invention, in which through holes are provided in the upper peripheral wall film and the lower peripheral wall film, and four peripheral wall films are overlapped. FIG. 4 is an explanatory view showing a fusion bonding portion when fusion is performed, as viewed from a front side peripheral wall film.

FIG. 5 is a perspective view when the liquid container of the present invention is accommodated in a holder.

FIG. 6A is an explanatory view showing the appearance of a liquid container according to an embodiment of the present invention using a composite material on the front side peripheral wall, and FIG. It is explanatory drawing which shows a state and the structure of a spout part.

FIG. 7 is an explanatory view showing a method of manufacturing a liquid container according to an embodiment of the present invention. FIG. 7 (a) shows an example in which four peripheral wall films are overlapped and fused, and then four corners are inclined. FIG. 3 is an explanatory view showing the fusion bonding portion when cut into pieces, as viewed from the front side peripheral wall film, and FIG. 2B is an explanatory view showing the appearance of the container when the container is filled with contents.

FIG. 8 (a) is an explanatory view from the front when the contents of the liquid container according to one embodiment of the present invention are fully filled, and FIG. 8 (b) is a view of completely discharging the contents. FIG. 5 is an explanatory diagram viewed from obliquely above the front when performing.

9A is a plan view when the contents of the liquid container of one embodiment are completely filled, and FIG. 9B is a plan view when the contents of the container are completely poured out. It is a top view.

[Explanation of symbols]

100 container 110 front side peripheral wall 111 film layer 112 paper layer 113, 114 crease processing 120 rear surface peripheral wall 130 upper surface peripheral wall 140 lower surface peripheral wall 151, 152, 153 , 154,155,156,1
61,162,163,164,165,166,16
7, 168,..., Fused parts 171, 172, 173, 174,...

Continued on front page F-term (reference) 3E035 AA03 AA19 BA01 BD02 BD04 CA01 3E064 AB25 BA01 BA26 BA29 BA36 BA55 BA60 BB03 BC18 EA02 EA04 EA16 EA30 FA05 GA01 HM03 HN65 HS04

Claims (8)

[Claims] When the contents are filled, a substantially rectangular parallelepiped box shape is formed, and a spout portion is provided on one peripheral wall of the box, and as the contents are poured out from the spout portion. A liquid container wherein a predetermined peripheral wall surface is deformed inward to reduce the volume of the container. 2. The peripheral wall of the liquid container comprises a front peripheral wall film having a spout, a rear peripheral wall film, an upper peripheral wall film, and a lower peripheral wall film. While the peripheral wall film is superimposed, the upper peripheral side wall film whose center is folded in two downwards, the upper side peripheral wall film in which the upper surface is hardly heat-sealed sandwiches the upper part, and the upper peripheral wall film whose center is folded in two upwards and the front-back direction A lower surface side peripheral wall film having a length substantially the same as that of the lower surface side peripheral wall film which is difficult to be heat-sealed is sandwiched with a gap between the lower surface side peripheral film and the upper surface peripheral wall film to form a fusion-bonded portion by heat fusion at the four-sided peripheral portion. The liquid container according to claim 1, wherein the peripheral wall films are connected to each other by a step. 3. A fused portion between a front peripheral wall film and a back peripheral wall film at a central portion of a left end side and a right end side of a fusion portion provided on the four-sided peripheral portion, and a front side of an upper portion. An angle range of 30 to 60 degrees is continued from a boundary portion between the fusion portion of the peripheral wall film, the upper peripheral side film, and the rear peripheral side film to the fusion portion on the upper end side of the fusion portion provided on the four-sided peripheral portion. A fusion portion is provided, and a fusion portion between the front side peripheral wall film and the rear surface peripheral wall film at the center of the fusion portion on the left end side and the right end side of the fusion portion provided on the four-sided peripheral portion, and a lower portion The angle range of 30 to 60 degrees from the boundary portion of the fusion portion of the front side peripheral wall film, the lower surface side peripheral film, and the back side peripheral wall film to the lower end side fusion portion of the fusion portion provided on the four-sided peripheral portion. 3. The liquid container according to claim 2, wherein a continuous fusion part is provided. 4. The liquid container according to claim 3, wherein a partial through-hole is provided in the upper peripheral wall film and the lower peripheral wall film in which the left end side and right end side fusion parts are overlapped. 5. A fused portion of a front peripheral wall film and a back peripheral wall film at a central portion of a left end side and a right end side of a fusion portion provided at the four-sided peripheral portion, and a front side of an upper portion. An angle range of 30 to 60 degrees is continued from a boundary portion between the fusion portion of the peripheral wall film, the upper peripheral side film, and the rear peripheral side film to the fusion portion on the upper end side of the fusion portion provided on the four-sided peripheral portion. An oblique fusion portion is provided, an upper portion is cut off from an upper end of the oblique fusion portion, and a front peripheral wall at a central portion of a fusion portion on a left end side and a right end side of the fusion portion provided on the four-sided peripheral portion. A fused portion provided at the four-sided peripheral portion from a boundary portion between a fused portion of the film and the back side peripheral wall film and a fused portion of the lower front side peripheral wall film, the lower side peripheral wall film, and the back side peripheral wall film. A continuous oblique welding portion is formed at the lower end side of the The liquid container according to claim 2, wherein the disconnecting a lower portion from the lower end of the fused portion of the Me oblique. 6. The liquid container according to claim 2, wherein the rigidity of the front side peripheral wall film is higher than the rigidity of the back side peripheral wall film, the upper side peripheral wall film, and the lower side peripheral wall film. 7. A paper layer (outside) is provided on the front side peripheral wall film.
7. A composite material having a film layer (inside) configuration, and a fold line processing for facilitating bending is performed at a bending position of a paper layer of the composite material.
A container for liquid as described in the above. 8. The spout is fixed to a front side peripheral wall film by inserting a mouth member into an opening provided at a predetermined position of the front side peripheral film, and has a projection provided on the inner side surface of the container of the mouth member. The liquid container according to claim 2, wherein: