JP3757632B2 - Liquid packaging container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid packaging container, particularly a liquid packaging container formed by bonding sheets.
[0002]
[Problems to be solved by the invention]
Conventionally, a bottle type container made of synthetic resin or the like has been problematic in that it tends to cause an increase in dust and environmental destruction by performing disposal when it is not needed. Under these circumstances, products such as kitchen detergents, laundry detergents, liquid softeners, shampoos, rinses, and body soaps, which have been used in large households in recent years, have an environmental impact as refills. It has come to be provided by using a liquid packaging container which is a container in which a material considering the above is selected and is difficult to bulk.
FIG. 6 shows a liquid packaging container 1 as an example thereof, which is composed of a front sheet 2, a back sheet 3 and a bottom sheet 4 each having a laminated structure, with the bottom sheet 4 interposed at the bottom of the container. 2 and the back sheet 3 are bonded together (for example, heat sealing), and the front sheet 2 can be self-supported by spreading between the lower side of the front sheet 2 and the lower side of the back sheet 3 at the bottom of the container. 3 and the back sheet 3 are bonded together and this form is generally called a standing pouch. And in this liquid packaging container 1, when transferring the contents to an empty container, one corner part of the upper part of the container is cut out, and the cut end is poured while being applied to the mouth part of the empty container. And, in order to facilitate the pouring of the contents, as shown in the figure, a substantially bowl-shaped spout portion 5 is provided at the corner, and the periphery of the front sheet 2 and the back sheet 3 is provided. A pouring passage 7 is disposed between the two convex seal portions 6 that are convex toward the center of the bonding container, and a step portion 8 is formed above and laterally from the spout portion 5 (that is, pouring). The outer edge shape of the outlet portion is formed in a concave shape), and the stepped portion 8 is applied to the mouth portion of the container, and the opened spout portion 5 is inserted into the container mouth portion, thereby A device has been proposed for the purpose of performing stable pouring while suppressing misalignment of the pouring port.
[0003]
By the way, since the liquid packaging container is formed from a relatively flexible sheet and easily deforms in shape, it is intended to insert the spout part into the container mouth part while opening the spout part and then tilting the container. At that time, the front sheet and the back sheet are deformed by moving the contents to the spout part side, and the front sheet and the back sheet come into close contact with each other at the spout part, and the spout passage is closed. There is a problem that the contents are difficult to be poured out smoothly.
From this point, many attempts have been made to suppress the close contact between the front sheet and the back sheet at the spout portion, and the applicant also has a spout portion 5 as shown in FIG. Proposals have been made for providing the front sheet 2 and the back sheet 3 with convex portions 9 formed by projecting and deforming the sheet itself. And when it is made to provide a convex part in the front sheet and back sheet of the spout part mentioned above, the part which is always open by this convex part is between the front sheet and the back sheet, that is, in the extraction passage. It was possible to form.
However, in the liquid packaging container in which convex portions are provided on the front sheet and the back sheet as described above, as shown in FIG. 7, known in the art such as deep embossing such as vacuum molding, pressure molding, and pressure molding. As a state where the front sheet 2 provided with the convex portions 9 and the back sheet 3 provided with the convex portions 9 are overlapped with each other by the molding method, they are arranged between the seal buns 10 of the heat seal device (FIG. 7 (A)), Heating the seal bun 10 together and heat-sealing the required portion, that is, the side of the sheet (FIG. 7 (b)), in particular, the heat-sealing region in the spout portion 5 provided with the convex portion 9 Since the distance from the convex portion is small, heat at the time of heat sealing is easily transmitted around the convex portion 9, and the front sheet 2 and the back sheet 3 are in close contact with each other around the convex portion 9 indicated by A in FIG. And when sealed Cormorants problem has occurred. For this reason, even if the outlet portion is opened and the contents start to be poured out from the space formed by the convex portion, the entire outlet passage is difficult to open, and the contents cannot be smoothly poured out. It was.
Therefore, in view of the circumstances described above, the present invention has an object to prevent the front sheet and the back sheet around the convex portion from coming into close contact with each other even under the influence of heat when performing heat sealing, and the contents flow out properly. The object is to obtain a liquid packaging container.
[0004]
[Means for Solving the Problems]
The present invention has been made in consideration of the above problems, and a liquid having a substantially bowl-shaped spout portion in which a spout passage is disposed on the upper side of the container by bonding the side portions of the front sheet and the back sheet. In the packaging container, at least one of the front sheet or the back sheet in the spout portion is provided with a convex portion that is convex toward the outside of the container in the thickness direction of the sheet, around the convex portion, A slope portion that is inclined from the general sheet surface to the outside of the container and inclined toward the outside of the container and is continuous with the convex portion is provided , and the periphery of the slope portion is a heat seal region between the front sheet and the back sheet. A liquid packaging container characterized by overlapping is provided to solve the above-mentioned problems.
And in the above-described convex portion and the slope portion, it is good that is extended to the portion of the housing area of the container body from the spout.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail based on the embodiment shown in FIGS. 6 and 7 are denoted by the same reference numerals, and the description thereof is omitted.
In the liquid packaging container 1 of the present invention, as shown in FIG. 2, the sheet thickness is set at the position on the center line 11 of the pouring passage 7 in the front sheet 2 and the back sheet 3 in the spout portion 5. One protruding portion 9 is provided so as to protrude toward the outside of the container in the vertical direction. The convex portion 9 extends in a tapered manner toward the storage region 12 of the container main body with the direction along the length direction of the center line 11 as the longitudinal direction. Thus, by providing the convex portion 9 on the front sheet 2 and the rear sheet 3 of the spout portion 5, a passage by the inner surface space of the convex portion 9 is formed inside the extraction passage 7. It will be. In addition, since the convex part 9 is extended to the storage area | region 12, the base part side of the spout part 5 will also be reinforced, and it will be hard to produce the bending between the spout part 5 and its storage area | region 12. is doing.
[0006]
As shown in FIGS. 1 and 2, each of the convex portions 9 has a plurality of reinforcing ribs 13 extending in the short width direction of the convex portion 9 and a center line 13 so as to intersect them. Reinforcing ribs 13 are provided and intersect with each other. The plurality of reinforcing ribs 13 provided on the convex portion 9 serve to increase the strength of the convex portion 9, and the convex portion 9 is inadvertently opened at the distribution stage of the liquid packaging container or when opened by a general consumer. The passage formed by the internal space of the convex portion 9 is prevented from being blocked even if it is touched. Each of the reinforcing ribs 13 is formed by vacuum forming, pressure forming, pressure forming or the like simultaneously with the forming of the convex portion 9 or in a separate process.
[0007]
Further, as shown in the figure, a slope portion 15 is provided around the convex portion 9 so as to incline from the sheet general surface 14 toward the outside of the container and have a cross-sectional shape in the form of an inclined plate continuously from the convex portion 9. The convex part 9 is in a state of projecting outward through a slope part 15 that is slightly raised from the sheet general surface 14. The slope 15 prevents the front sheet 2 and the back sheet 3 around the projection 9 in the spout portion 5 from sticking when the container body is formed. The front sheet 2 and the back sheet 3 are overlapped and placed between the seal buns 10 of the heat sealing device with the portion 15 facing each other (FIG. 3 (A)). The portion (that is, the peripheral portion of the container) is heat-sealed, but the slope portion 15 of the front sheet 2 and the slope portion 15 of the back sheet 3 are not in contact with each other. Even if it extends, the front sheet 2 and the back sheet 3 around the convex portion 9 are prevented from closely contacting each other (FIG. 3 (B)).
The slope portion 15 is formed as shallow embossing by vacuum molding, pressure forming, pressure molding or the like simultaneously with the molding of the projection 9 or in a separate process, and the slope portion 15 crosses at least the projection 9. In the portion where the planned opening line portion 16 set in this way is located, it is molded so as to overlap the heat-sealing region between the front sheet 2 and the back sheet 3, and after the heat sealing, the planned opening line portion 16 is formed. As shown in FIG. 2, the inclined surface portion 15 is continuous from the inner edge of the heat-sealed side portion without interposing the sheet general surface. Thus has peripheral 15a of the sloping portion 15 at the location of at least the opening scheduled line portion 16 is positioned is Tsu Do heavy heat sealing area, shows a peripheral 15a that Tsu superimposed on the heat-sealed region in FIG in phantom Yes.
[0008]
FIG. 4 shows another example. In this example, the slope portion 15 is provided around the convex portion 9 in the spout portion 5, and the convex portion 9 side is centripeted from the convex portion 9 toward the storage region 12 side in the liquid packaging container 1. In this state, a plurality of muscle pushers 17 are continuously arranged, and the muscle pushers 17 and the slope portion 15 are arranged to overlap each other. The muscle pusher 17 further reinforces the sheet extending from the spout portion 5 to the storage region 12, thereby making it difficult for bending between the spout portion 5 and the storage region 12 to occur during pouring. I am doing so. In addition, although the convex part 9 and the slope part 15 are extended so that the storage area | region 12 may be covered, you may lay out so that this convex part and the slope part 15 may be settled in the area | region of the spout part 5. FIG. Is.
[0009]
FIG. 5 shows the liquid packaging container 1 in which the slope portion 15 is arranged around the convex portion 9. In the liquid packaging container 1 shown in FIG. 5, the shape of the spout portion 5 is different from the above-described example, and the spout portion is formed into a straight line without forming a step portion on one side of the container body. 5 has a substantially mountain shape and protrudes upward. As shown in this example, the structure in which the slope portion 15 is provided with respect to the convex portion 9 can also be adopted for the spout portion 5 having a substantially mountain shape without limiting the shape of the liquid packaging container 1. It can be used as a spout part in a sheet-bonded container.
[0010]
Examples of the material configuration used for the container of the present invention include the following.
(1)
Front sheet, back sheet: (outer surface) polyethylene terephthalate (12 μm) / aluminum foil (7 μm) / stretched nylon (15 μm) / linear low density polyethylene (100 μm)
Bottom sheet: (Outer surface) Nylon (25 μm) / Aluminum foil (7 μm) / Linear low density polyethylene (120 μm)
(2)
Front sheet, back sheet: (outer surface) polyethylene terephthalate (12 μm) / stretched nylon (15 μm) / linear low density polyethylene (130 μm) with a vapor deposition layer on the inner surface
* Examples of the vapor deposition layer include metal vapor deposition such as aluminum, and inorganic compound vapor deposition such as alumina and silica.
Bottom sheet: (Outer surface) Nylon (25 μm) / Linear low density polyethylene (120 μm)
(3)
Front sheet, rear sheet: (outer surface) polyethylene terephthalate (12 μm) with a vapor deposition layer on the inner surface / stretched nylon (15 μm) with a vapor deposition layer on the outer surface / linear low density polyethylene (130 μm)
Bottom sheet: (Outer surface) Nylon (25 μm) / Linear low density polyethylene (120 μm)
(4)
Front sheet, rear sheet: (outer surface) polyethylene terephthalate (12 μm) / linear low density polyethylene (150 μm) with a vapor deposition layer on the inner surface
Bottom sheet: (Outer surface) Nylon (25 μm) / Linear low density polyethylene (150 μm)
(5)
Front sheet, rear sheet: (outer surface) polyethylene terephthalate (12 μm) / stretched nylon (15 μm) / linear low density polyethylene (130 μm)
Bottom sheet: (Outer surface) Nylon (25 μm) / Linear low density polyethylene (130 μm)
(6)
Front sheet, back sheet: (outer surface) polyethylene terephthalate (12 μm) / stretched nylon (15 μm) provided with a vapor deposition layer on the outer surface / linear low density polyethylene (130 μm)
Bottom sheet: (Outer surface) Nylon (25 μm) / Linear low density polyethylene (130 μm)
(7)
Front sheet, rear sheet: (outer surface) stretched nylon (15 μm) / linear low density polyethylene (150 μm)
Bottom sheet: (outside) stretched nylon (25 μm) / linear low density polyethylene (150 μm)
[0011]
【The invention's effect】
As described above, according to the liquid packaging container of the present invention, the side portions of the front sheet and the back sheet are bonded together, and the substantially bowl-shaped spout portion in which the spout passage is disposed on the container upper side. In the liquid packaging container having, at least one of the front sheet and the back sheet in the spout part is provided with a convex part that is convex toward the outside of the container in the thickness direction of the sheet, and around the convex part In addition, a slope portion that is inclined from the general sheet surface to the outside of the container and in the thickness direction of the sheet and continues to the convex portion is provided , and the periphery of the slope portion is a heat seal between the front sheet and the back sheet. It is characterized by overlapping the area .
In this way, since the slope is provided around the convex portion and the periphery thereof overlaps the heat seal region of the front sheet and the back sheet, the convex portion is removed from the heat seal region by heat sealing when the liquid packaging container is manufactured. Even if heat is transferred to the surrounding sheets, that is, the inclined surface portions, the inclined surface portions do not adhere to each other, and the surface where the sheets are separated from each other in the inner space of the extraction passage is secured including the inner surface of the convex portion. When opened, a wide open opening is obtained and the contents can be poured out smoothly.
Then, the periphery of the slope portion, it is possible to ensure maximum sheet unbonded portion of the spout section direction in the front seat and the heavy Nalco heat-sealing region of the backsheet. Furthermore, since the inclined surface itself has an embossed shape that is different from the general sheet surface and raised toward the outside of the container, it has the effect of giving strength to the flat general sheet itself. Yes, if it is extended from the spout part to the storage area of the container body together with the convex part, reinforcement between the spout part and the storage area can be performed, and pouring during contents pouring operation etc. It is possible to suppress the bending of the outlet portion on the base side, and further, the base side of the outlet portion can be easily opened at the time of pouring.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of a liquid packaging container according to the present invention.
FIG. 2 is an explanatory view showing a state in which a spout part in an example is opened.
FIG. 3 is an explanatory view showing heat sealing at a spout portion.
FIG. 4 is an explanatory diagram showing another example.
FIG. 5 is an explanatory view showing another example of the embodiment.
FIG. 6 is an explanatory diagram showing a conventional example.
FIG. 7 is an explanatory view showing heat sealing of a spout portion in a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid packaging container 2 ... Front sheet 3 ... Back sheet 5 ... Spout part 9 ... Convex part 12 ... Storage area 13 ... Reinforcement rib 15 ... Slope part 16 ... Planned opening line part

Claims (2)

In the liquid packaging container having a substantially bowl-shaped spout portion in which the spout passage is disposed on the container upper side by bonding the sides of the front sheet and the back sheet,
At least one of the front sheet and the back sheet in the spout portion is provided with a convex portion that is convex toward the outside of the container in the thickness direction of the sheet, and from the general sheet surface around the convex portion. A slope portion that is inclined toward the outside of the container and is continuous with the convex portion is provided in the thickness direction of the sheet, and the periphery of the slope portion overlaps the heat seal area between the front sheet and the back sheet. A liquid packaging container characterized by. The liquid packaging container according to claim 1, wherein the convex portion and the slope portion are extended from the spout portion to a portion of a storage area of the container body.

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