JP2001341752A - Liquid storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid storage container which is easy to attach to an apparatus, excellent in the discharging efficiency of the content even when the highly viscous content is sucked to discharge, less costly in transport and storage, and easy in disposal. SOLUTION: This flexible liquid storage container which is substantially rectangular parallelopiped box in contour when filled with the content, provided with a mouth member 5 mounted on a front surface 1 to enable the filling or the discharge of the content comprises a thick-walled film A forming four continuous surfaces, i.e., the front surface 1, an upper surface 2, a back surface 2 and a lower surface 3 and a thin-walled film forming two surfaces, i.e., right and left side surfaces 6 and 7. The film B comprising the two surfaces is folded so that surfaces to be bonded are outside, and is formed by bonding the film A comprising the four surfaces to the periphery thereof while inserted into an inner surface of the thick-walled film A of the four surfaces, and the folding is made on a ridge of each boundary of the surfaces of the film A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container for storing a high-viscosity liquid such as ink, mayonnaise, ketchup, sauce and the like, and applying the liquid to a self-priming machine.

[0002]

2. Description of the Related Art Conventionally, as a liquid container for storing a high-viscosity liquid and applying it to a self-priming machine, there is, for example, a bag-in-box. This liquid container accommodates a film body in which a thick mouth member is fused to one side for discharging or filling and discharging the contents in a substantially square or cylindrical outer box made of cardboard or cardboard etc. It was done. The mouth may be one that is projected from the outer box in advance, or one that opens a part of the outer box to draw out the mouth when used. This liquid container has been mainly used as a business container for storing liquids such as sauces, soy sauce, sake, and developing solutions.

[0003] By the way, in the case of high-viscosity contents such as pork cutlet sauce, ink for stencil printing or silk-screen printing, and mayonnaise, the contents cannot be discharged from the mouth of the container simply by gravity. Then, the contents were sucked from the mouth and discharged.

However, in the above-described conventional liquid container such as a bag-in-box, when the contents are sucked and discharged from the mouth, the contents near the mouth are first discharged.
Since the viscosity of the contents was high, the volume of the discharged contents was deformed and filled by the film body of the container, and the suction force could not reach the contents away from the mouth in some cases.
Therefore, as shown in FIG. 9, the film body 53 (film bag) accommodated in the outer box 52 of the container is a, b,
There was a problem that the film was deformed in the order of c and d, and a part of the film body near the mouth member 5 was sucked, thereby blocking the mouth of the mouth member, and the discharge efficiency of the contents was large. For this reason, a method has been devised in which the film is stuck on the inner surface of the outer box, which is about half the outer surface of the film, so that the film is completely folded at the time of discharge, but a sufficient effect was not obtained.

[0005]

Therefore, the present inventor has proposed:
Even if the container is filled with high-viscosity contents, the contents are reliably discharged without the film body (film bag) closing the mouth of the mouth member when the contents are sucked and discharged, and the residual amount of the contents is reduced. An extremely small liquid container of less than 2% was developed.

In recent years, it has become necessary to consider not only production but also disposal of mass-produced products. In particular, plastic containers have been widely used because of their excellent protection and convenience of the contents, but there is a problem that empty containers after discharging the contents are difficult to dispose. It is bulky, bulky, and expensive to transport and store. Even when buried and discarded, it remains in the same shape and size forever without being decomposed by microorganisms. When incinerated, the furnace burns easily because of the high calories burned. There were social problems such as: A liquid container was developed in consideration of solving these problems.

The inventor made a container using a simple film bag and conducted a filling / discharging test. The cause of the variation in the discharge is that the viscosity of the contents is large, so that the film near the mouth is drawn together with the contents at the time of discharge, and the mouth of the mouth member of the container is blocked by the film, This is because the films between the object and the mouth adhere to each other. In addition, when the container has a free shape, there is a problem in that the device cannot be easily inserted into the container storage case, and it is difficult to cope with the suction device.

According to the present invention, there is provided a film made of a film which is easy to be inserted into an apparatus, has a good discharge efficiency even when suctioning and discharging high-viscosity contents, has low transportation and storage costs, and is easy to dispose. A bag-shaped liquid container is provided.

[0009]

That is, according to the first invention of the present invention, when the contents are filled, the outer shape becomes a substantially rectangular parallelepiped box shape, and a mouth member is attached to the front surface to fill the contents. Or a flexible liquid container capable of discharging, a thick film A forming four continuous surfaces of a front surface, an upper surface, a back surface, and a lower surface, and a thin film B forming two surfaces of left and right side surfaces. The two films B are folded such that the surfaces to be fused are on the outside, and inserted into the inner surfaces of the four thick films A. A liquid container, which is formed by fusing the periphery thereof, and in which a ridge line is formed on a ridge line of each surface boundary of the film A.

Next, in a second invention, a crimp is formed so that the lower end of the film A and the lower end of the fused portion where the film A and the film B are fused are bent substantially in parallel with the lower surface. The liquid container according to the first invention, characterized in that:

[0013] Next, the third invention is such that the lower end of the film A and the lower end of the fused portion of the film A and the film B are bent substantially parallel to the lower surface toward the rear surface. A first or second feature characterized by having a folding habit;
A liquid container according to the invention.

Next, in a fourth invention, a through hole is provided in the two films B superimposed on the inside of the fused portion formed on the lower surface or the upper surface, and the two outer films are formed by the through holes. First to third films, wherein films A are fused together.
A liquid container according to the invention.

Next, in a fifth aspect of the present invention, the film A on the upper surface and the fusion portion at the upper end where the film A and the film B are fused are bent so as to be bent substantially parallel to the upper surface. A liquid container according to any one of the first to fourth aspects of the invention.

A sixth aspect of the present invention is characterized in that a handle hole for carrying and inserting a machine is provided at the upper end of the film A and at the upper end of the film A and the film B where the film A is fused. The liquid container according to any one of the first to fifth inventions.

According to a seventh aspect of the present invention, a projection is provided at least at one position inside the mouth member, having a height of at least 10 times the film thickness and a gap of 50 times or less. A liquid container according to any one of the first to sixth aspects.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a liquid container according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a liquid container according to one embodiment of the present invention comprises a front surface 1, an upper surface 4, a rear surface 2, and a lower surface 3, which are formed by, for example, a polyamide / a saponified ethylene / vinyl acetate copolymer / modified polyethylene / 250μ which is a laminated film such as polyethylene
m, and a separate mouth member 5 for filling or discharging the contents is formed by making a hole at a predetermined position on the front surface and protruding by an ultrasonic sealing method or the like. It fuses. The thickness of the film A is 250
It is not limited to μm, but is prepared at 150 to 300 μm according to the intended use of the container.

The right side surface 6 and the left side surface 7 shown in FIG. 1 which form a surface perpendicular to the above-mentioned four surfaces are, for example, biaxially stretched polyamide / ethylene / vinyl acetate copolymer saponified material / modified polyethylene / polyethylene. A liquid container in the form of a bag made of film was prepared from a thin film B having a thickness of 120 μm, which is a laminated film having a configuration and the like. The film B has a barrier property against oils and fats and moisture, and the outer surface of the container is made of a material that is not easily fused. The thickness of the film B is not limited to 120 μm, but may be 80 to 20 in accordance with the intended use of the container.
It is manufactured at 0 μm.

The fused portion on the lower surface shown in FIG.
Four films, a film and two films B, are fused and bent in parallel to the lower surface. This is because a bending habit is formed at the bending position at the time of manufacturing. In addition, the portions where the films B that are not originally fused seem to be fused are partially overlapped as shown in FIG. This is because through holes (35 to 44) (including notches) are provided in the combined film B, and the polyethylene layers of the films A are designed to be in contact with each other and to be fused at that portion.

The fused portion of the upper surface 1 shown in FIG. 1 is designed such that four films are fused and bent in parallel to the upper surface in the same manner as the fused portion of the lower surface 3. If the handle is longer than the lower surface and a large handle hole 45 is provided in the fusion portion, the container can be easily held and the container can be easily inserted into the suction device by hand. Note that a small hole may be provided instead of the large handle hole, and a separate handle may be attached to the small hole.

FIG. 2 shows a portion where each film constituting the container is fused. The film A forms a front surface, a back surface, a lower surface, and an upper surface, and the film A is fused only in a small portion of the fusion parts 8 and 9. Other fused parts 10, 11, 12, 13, 14, 15, 16, 1
7, 18, 19, 20, 21, 22, 23, 24, 25
In this example, the film A and the film B are fused. Since it is difficult for the film B to be fused only on one side, at a normal fusion temperature of about 220 ° C., even if the film A is superimposed on the film A / film B / film B / film A, these are shown in FIG. As shown, since the films B do not fuse together, the film A / film B and the film B / film A
Are fused. Therefore, to manufacture the container of the present invention,
If the film A in which the mouth member is fused in advance is prepared, the film A and the film B can be easily arranged by simply stacking (indicated by an arrow) as shown in FIG. The container can be manufactured. Heretofore, a manufacturing method of performing such fusion at one place has been known as a manufacturing method of a standing pouch. However, by using two places as described above, a box shape having a rectangular parallelepiped outer shape can be obtained. There was no known method for producing such a container.

In this case, as shown in FIG.
9 and fusion parts 14, 15, 16, 17, 18, 19, 2
From the boundary with 0, 21, 22, 23, 24, 25, 4
At an angle of 5 degrees, the fusion parts 26, 27, 28, 29, 3
By providing 0, 31, 32, and 33, the shape becomes clearer, and when the contents are filled, the container tends to have a rectangular parallelepiped box shape, and the contents are less likely to enter a portion where the contents are difficult to discharge, Further, when the film B is discharged, the film B is easily folded first.

FIG. 4 is a plan view showing the shape of the liquid container of the present embodiment before the contents are filled. The creases 46 and 47 and the folds 48 and 49 may be, for example, heated and pressed in a bent state or simply pressed against a heating plate at 100 to 150 ° C., but four films are fused. Pressing is more reliable for bending the upper and lower ends of the part. Also, through holes 35, 36, 37, 3 indicated by broken lines
8, 39, 40, 41, 42, 43, and 44 are portions where a through hole is provided in the inner film B and the outer films A are fused to each other. The shape of the through hole is not limited to a circle, and may be any necessary shape.

FIGS. 5A and 5B show the shape of the liquid container of the present embodiment when the liquid container is filled with the contents. FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. FIG. To suck and discharge the contents, the positioning plate of the contents suction machine is hung on the flange of the mouth member 5 attached to the container, and the suction nozzle is inserted. A rubber O-ring provided on the side of the suction nozzle is pressed against the inner side wall of the mouth member to ensure airtightness,
Alternatively, it prevents the outside air from being sucked by pressing the nozzle against the perforated wall at the back.

FIGS. 6 and 7 sequentially show the change in the shape of the container when the contents are sucked and discharged from the state of FIG.
(A) is a plan view, (b) is a front view, and (c) is a right side view. FIG. 6 shows the shape of the container while the contents are being discharged, and FIG. 7 shows the shape of the container when the contents are completely discharged. As can be seen from the shape change shown in the figure, the mouth member 5 is fixed by the positioning plate of the contents suction device and the surrounding wall, and the front surface 1 to which the mouth member is fused does not move. The right side surface 6 and the left side surface 7 made of the low film B are sucked toward the mouth member side, and the lower surface 3 gradually becomes the front surface 1.
It moves toward.

The mouth member is usually made of a thermoplastic resin such as polyethylene by injection molding and has a thickness of 0.6 to 0.6.
It is manufactured to about 2.0 mm. As shown in FIG. 8, the mouth member 5 has a protrusion 50 provided on the inside. This projection is for preventing the film forming the container from closing the mouth when the contents are sucked and discharged from the container,
It is provided at one or more locations, preferably at two or more locations.
The height of the projections depends on the rigidity of the film B and the viscosity of the contents, but needs to be 10 times or more the thickness of the film B, and the gap 51 is preferably 50 times or less. Basically,
When designing a product, the height is about 20 times that of the film B and the gap is about 25 times as standard.

When the contents are sucked and discharged and folded, a reinforcing member 34 (indicated by a two-dot chain line) is placed on the portion of the film B to which the spout contacts, as shown in FIG. In addition, the rigidity is partially increased, the film B does not block the spout, and the discharge of the contents is stabilized. The reinforcing material to be overlaid on the film B may be a film, cardboard, or the like, and the reinforcing material may be attached to the inside or outside of the film B by means such as fusion or adhesion.

Next, six types of containers having the same film thickness of A and B, no crease processing, no protrusion of the mouth member, claim 1, claim 3 and claim 5 are prepared, and the contents are prepared as contents. A high-viscosity silk-screen printing ink was charged, and a discharge test was performed to measure the remaining amount of the contents in each container. Table 1 shows the measurement results.

[0028]

[Table 1]

As shown in Table 1, the film thickness is the same,
The three types of containers without crease processing and without the protrusion of the mouth member had a large residual amount of contents. On the other hand, the three types of containers of the present invention corresponding to claim 1, claim 3 and claim 5 have a small residual amount of contents, and particularly the container according to claim 5 has high reproducibility.

The film bag-shaped liquid container of the present invention comprises:
Primarily, high viscosity liquids such as inks, chocolate, mayonnaise, ketchup, liquid detergents, clothing softeners,
This is a container used for paint, adhesive, honey, etc., and is basically intended for mechanically sucking and discharging the contents from the container.

The film A is produced by a laminating method such as dry lamination, wet lamination, extrusion lamination, etc., and has a structure of polyamide / modified polyethylene / polyethylene, saponified ethylene / vinyl acetate copolymer / modified polyethylene. / Polyethylene composition, polyamide / ethylene ・
Saponified vinyl acetate copolymer / modified polyethylene / polyethylene composition, biaxially stretched polyethylene terephthalate / polyamide / modified polyethylene / polyethylene composition, 2
Axial stretched polyethylene terephthalate / saponified ethylene / vinyl acetate copolymer / modified polyethylene / polyethylene composition, biaxially stretched polyethylene terephthalate / polyamide / saponified ethylene / vinyl acetate copolymer / modified polyethylene composition, biaxially oriented polypropylene / polyamide / A laminated film such as a modified polyethylene / polyethylene structure can be used according to the intended use of the container. The modified polyethylene is a maleic anhydride-modified polyethylene or the like.

The film B has a biaxially stretched polyamide / polyethylene structure, a biaxially stretched polyethylene terephthalate / a saponified ethylene / vinyl acetate copolymer / modified polyethylene / polyethylene structure, and a biaxially stretched polyamide / ethylene / vinyl acetate copolymer. A laminated film having a combined saponified material / modified polyethylene structure, biaxially stretched polypropylene / polyamide / modified polyethylene / polyethylene structure, or the like can be used according to the intended use of the container. The film B is preferably less rigid than the film A. This is because, by making the contents soft, the contents can be easily folded by entering the inside before the film A when the contents are discharged. In order to reduce the rigidity, a rigid barrier layer, that is, a layer of a saponified ethylene / vinyl acetate copolymer or a polyamide is made thinner, and a biaxially stretched polyethylene terephthalate layer is made thinner. Further, the rigidity may be reduced by reducing the total thickness of the film.

As the separate mouth member, an injection-molded product such as polyethylene is usually used. If a barrier property is particularly required, a multilayer injection-molded product of sandwich molding may be used. In the mouth member, a flange for supporting the container when filling or sucking and discharging the contents is provided at a predetermined position of the neck portion, and the shape of the flange is circular, hexagonal, pentagonal, square, or any other necessary shape. It can take any shape.

Further, in the film bag-shaped liquid container of the present invention, the portion other than the spout can be flattened to reduce the volume. Before filling the contents, the container can be stored and transported in a flat shape, so that storage costs and transport costs are low. Therefore, there is no need to set up a dedicated container manufacturing factory in the filling factory, and the initial cost can be reduced.

The fusion parts 14, 15, 16, 17 shown in FIG.
In this case, if a part of the film B is cut out to form a through hole or the width is reduced, and the films A on both sides are fused together, the shape of the container can be easily maintained. In the liquid container of the present embodiment, as shown in FIG.
7, 38, 39, 40, 41, 42, 43, 44 were provided. Although the handle hole 45 is provided, it is preferable that this processing be performed by post-processing after the fusion is completed because the finish is beautiful.

It should be noted that the liquid container of the present invention can provide almost the same effect even when the container is used with the container tilted sideways. The position can be changed to respond.

In the liquid container of the present invention, when the width of the front surface is larger than the width of the left and right sides, the front surface, the back surface, the upper surface, and the lower surface are basically made of the film A. If the width <the width of the left and right side surfaces and the height of the front surface> the depth of the upper and lower side surfaces, the front surface, the back surface, the left side surface, and the right side surface are made of the film A.

[0038]

The liquid container of the present invention is used for high-viscosity contents, and can be used for an automatic filling machine or an automatic suction machine for filling contents. There is no clogging with the film forming the container, the discharge state of the contents is good, and the discharge remaining amount is small. A handle can be provided, the container is easy to hold, and the container can be easily inserted into the suction device by hand.

In order to prevent the contents from remaining in the container when the suction and discharge of the liquid contents are completed, for example, a special device is attached to the inner surface of the container (bag) or special processing is performed. Therefore, the liquid can be discharged smoothly without any residual suction liquid.

Further, the empty container of the liquid container of the present invention can be formed into a flat shape, and the storage and transportation of the container before filling the contents and after discharging the contents takes no space, so that the storage cost and the transportation are reduced. Cost is low.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram showing a position of a mouth member, a position of a fusion portion, a position of a through hole, and a position of a handle hole of each film forming the liquid container of one embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a state in which films are superimposed during fusion in the production of the liquid container of the present invention.

FIG. 4 is a plan view showing a shape of a liquid container according to an embodiment of the present invention before filling the contents;

FIGS. 5A and 5B show a filled shape of the liquid container according to the embodiment of the present invention, wherein FIG. 5A is a plan view, FIG. 5B is a front view, and FIG.
Is a right side view.

FIGS. 6A and 6B show a shape of a liquid container according to an embodiment of the present invention in which contents are being discharged, wherein FIG. 6A is a plan view, FIG. 6B is a front view, and FIG.

FIG. 7 shows a shape when the contents of the liquid container of one embodiment of the present invention are completely discharged, and (a) is a plan view,
(B) is a front view, (c) is a right side view.

FIG. 8A is a cross-sectional view of a mouth member according to an embodiment, and FIG. 8B is a bottom view thereof.

FIG. 9 is an explanatory diagram showing a change in shape of a film body stored in an outer box in a conventional back-in box due to discharge of contents.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Front surface 2 ... Back surface 3 ... Lower surface 4 ... Upper surface 5 ... Mouth member 6, 7 ... Side surface 8-33 ... Fusion part 34 ... Reinforcement material 35-44 ... Through-hole 45 ... Handle holes 46, 47 ... Crease processing 48, 49 ... Folding tendency 50 ... Protrusion 51 ... Gap 52 ... Outer box 53 ... Film body

Claims (7)

[Claims] 1. A flexible liquid container having a substantially rectangular parallelepiped outer shape when filled with a mouth member attached to a front surface thereof to enable filling or discharging of the contents. A thick film A forming four surfaces of a front surface, an upper surface, a back surface, and a lower surface, and a thin film B forming two surfaces of left and right side surfaces.
In the state where each of the four surfaces is bent so that the surface to be fused is on the outside and inserted into the inner surface of the four thick films A,
A liquid container, which is formed by fusing the four sides of the film A and the periphery thereof, and in which a ridge line is formed on a ridge line at each surface boundary of the film A. 2. Films A on the lower surface and a film A
2. A liquid container according to claim 1, wherein a fusion portion at a lower end where the film and the film B are fused is bent so as to be bent substantially in parallel with the lower surface. 3. Films A on the lower surface and a film A
The liquid container according to claim 1 or 2, wherein a fusion portion at a lower end where the film and the film (B) are fused is bent so as to bend toward a rear surface side substantially in parallel with the lower surface. 4. A through hole is provided in two films B superimposed on the inside of the fused portion formed on the lower surface or the upper surface, and the two outer films A are fused together by the through hole. 4. The liquid container according to claim 1, wherein: 5. The film A on the upper surface and the film A
The liquid container according to claim 1, wherein a fusion portion at an upper end of the liquid container and the film B is bent so as to be bent substantially in parallel with the upper surface. 6. The film A on the upper surface and the film A
6. The liquid container according to claim 1, wherein a handle hole for carrying and inserting a machine is provided in a fusion portion at an upper end where the film and the film B are fused. 7. The liquid according to claim 1, wherein a projection having at least one location, a height of at least 10 times the thickness of the film and a gap of 50 times or less is provided inside the mouth member. container.