Liquid-storing paper container

Abstract

To provide a liquid-storing paper container from which a viscous liquid content can be discharged even when the remaining content is low.SOLUTION: A liquid-storing paper container 1 includes a main body 2, which is formed of a laminate of a paper layer 32, a gas barrier layer 36 and a thermal adhesive resin layer 39, and a pouring member 4 for pouring out contents. The main body 2 includes a cylindrical body 5 that has a plurality of side panels 22a to 22d set up jointly, a bottom surface portion 7 that closes the bottom surface of the body 5, and a top surface portion 6 that closes the top surface of the body 5, and at least a notch 10 is provided in the body 5 by cutting out the paper layer 32. The notch 10 includes a first notch 11 formed in a line extending in the vertical direction in the widthwise center of the pair of facing side panels 22b, 22d, and a second notch 12 that is formed in a V-shape widening downwards and is arranged below the first notch 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a liquid paper container for containing a viscous liquid. [Background technology]

[0002] A conventional liquid paper container for containing viscous liquids such as dressings and shampoos is disclosed in Patent Document 1. This liquid paper container is formed into a Gabeltop type from a laminate of a paper layer, an intermediate layer, and a thermally adhesive resin layer, and a pouring member is provided in a sloped roof disposed above a cylindrical body. A notch is formed at both ends of one of the side panels constituting the body, where only the paper layer is cut out, and a fold line is provided connecting both notches. The viscous liquid content can be forcibly discharged by holding the body in one hand and repeatedly pressing the fold line with the fingers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5380850 (pages 6 to 11, Figure 1) Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-mentioned conventional liquid-containing paper containers, there was a problem that when there was little content remaining, the content could not be discharged even by pressing the fold line between the cutouts.

[0005] An object of the present invention is to provide a liquid-containing paper container which is capable of discharging a viscous liquid content even when there is only a small amount remaining. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a liquid-storing paper container including a body formed of a laminate including a paper layer, a gas barrier layer, and a thermal adhesive resin layer, and a pouring member for pouring out contents, the liquid-storing paper container comprising: The main body portion has a cylindrical body portion having a plurality of side panels connected together, a bottom surface portion that closes the bottom surface of the body portion, and a top surface portion that closes the top surface of the body portion, and a cutout portion is provided in at least the body portion by cutting out the paper layer, The cutout portion is characterized in that it has a first cutout portion formed in a line extending in the vertical direction in the widthwise center of the pair of opposing side panels, and a second cutout portion arranged below the first cutout portion and formed in a V-shape extending downward.

[0007] Furthermore, in the liquid-storing paper container of the present invention configured as described above, the cutout portion has a third cutout portion extending in the width direction of the side panel from an upper end of the second cutout portion.

[0008] The present invention also provides a liquid-storing paper container having the above-mentioned configuration, wherein the ceiling portion has a pair of inclined plates that are inclined and opposed to each other and have upper ends bonded to each other, and a pair of ceiling side plates that connect the pair of inclined plates, and the pouring member is formed into a Gabel top type attached to one of the inclined plates, The cutout portion has a fourth cutout portion provided in the ceiling side panel and disposed on an extension of the first cutout portion.

[0009] Furthermore, in the liquid container of the present invention configured as described above, the second cutout portion is continuous with a lower end of the first cutout portion.

[0010] Furthermore, in the liquid-storing paper container of the present invention configured as described above, a lower end of a side edge of the side panel is disposed on an extension of the second cutout portion.

[0011] Furthermore, in the liquid-storing paper container of the present invention having the above-mentioned configuration, the inside can be visually confirmed through the cutout portion. Effect of the Invention

[0012] According to the present invention, the side panel has a first notch that is linear and extends vertically in the center of the width direction, and a second notch that is provided below the first notch and extends in a V-shape that widens downward. This makes it possible to easily fold the liquid-retaining paper container over the first and second notches, allowing the remaining viscous liquid content to be drained to the last. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a liquid-holding paper container according to a first embodiment of the present invention, seen from the front; [Diagram 2] FIG. 1 is a perspective view of a liquid-holding paper container according to a first embodiment of the present invention, seen from the rear. [Diagram 3] FIG. 1 is a plan view showing a blank plate of a liquid paper container according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a cross-sectional view showing a layer structure of a blank plate of a liquid paper container according to a first embodiment of the present invention. [Diagram 5] FIG. 1 is a perspective view showing a state in which the liquid-holding paper container of the first embodiment of the present invention is folded over a notch; [Figure 6] FIG. 1 is a side view showing a folded state of a liquid-holding paper container according to a first embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing a liquid-holding paper container according to a second embodiment of the present invention; [Figure 8] FIG. 13 is a perspective view showing a liquid-holding paper container according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] First Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 and 2 are perspective views of a liquid-storing paper container 1 of a first embodiment as seen from the front and rear. The liquid-storing paper container 1 holds viscous liquid contents such as seasonings (dressing, ketchup, mayonnaise, etc.) and hygiene products (shampoo, rinse, body soap, etc.).

[0015] The liquid-storing paper container 1 comprises a main body 2 and a pouring member 4. The main body 2 is formed into a Gabeltop type by bending a blank plate 20 (see FIG. 4) having a paper layer 32 (see FIG. 4). The main body 2 has a cylindrical body 5 whose bottom surface is closed by a bottom surface portion 7 (see FIG. 6), and whose top surface is closed by a top surface portion 6 which forms a sloped roof. The body 5 and the top surface portion 6 are provided with a cutout portion 10 which will be described in detail below.

[0016] The spouting member 4 is made of a resin molded product and is disposed on one of the inclined plates 23c that form the top surface 6. The side on which the spouting member 4 is disposed is the front side of the liquid-dispensing paper container 1. The spouting member 4 is opened and closed by a cap 4a, and forms a spout for the contents.

[0017] 3 shows a plan view of the blank plate 20 with the main body 2 of the liquid paper container 1 unfolded. The blank plate 20 has fold lines 21 at predetermined positions, and rectangular side plates 22a to 22d and adhesive strips 25 that form the body 5 are connected in sequence in one direction via the fold lines 21. The side plate 22a on the rear side and the side plate 22c on the front side are connected at one end by the side plate 22b and at the other end by the side plate 22d.

[0018] An inclined plate 23a is connected to the upper end of the side panel 22a on the rear side, and a bottom panel 24a is connected to the lower end. A ceiling side panel 23b is connected to the upper end of the side panel 22b, and a bottom panel 24b is connected to the lower end. An inclined plate 23c is connected to the upper end of the side panel 22c on the front side, and a bottom panel 24c is connected to the lower end. An insertion hole 8 for attaching the spouting member 4 (see FIG. 1) is provided in the inclined plate 23c. A ceiling side panel 23d is connected to the upper end of the side panel 22d, and a bottom panel 24d is connected to the lower end. An adhesive piece 25 is provided adjacent to the side panel 22d, the ceiling side panel 23d, and the bottom panel 24d.

[0019] The blank plate 20 is formed into a cylindrical shape by folding along the fold lines 21 and thermally bonding with the adhesive strips 25. That is, the adhesive strip 25 adjacent to the side plate 22d at one end is thermally bonded to the side plate 22a at the other end to form a cylindrical body portion 5 (see FIG. 1) that is closed in the circumferential direction.

[0020] Similarly, by thermally bonding the adhesive strip 25 to the inclined plate 23a, the top surface portion 6 (see FIG. 1) is formed in a state in which the upper end is open and closed in the circumferential direction. Also, by thermally bonding the adhesive strip 25 to the bottom surface plate 24a, the bottom surface portion 7 (see FIG. 6) is formed in a state in which the lower end is open and closed in the circumferential direction.

[0021] The bottom portion 7 is formed by folding the bottom plates 24a to 24d along the folding lines 21 and then bonding them to the bottom of the body portion 5 by thermal bonding in a closed state.

[0022] The pouring member 4 inserted into the insertion hole 8 is thermally bonded to the inclined plate 23c of the top surface portion 6 around the insertion hole 8. After the contents are filled, the inclined plate 23a, the ceiling side plate 23b, the inclined plate 23c, and the ceiling side plate 23d are folded at the folding line 21 and thermally bonded at predetermined locations. At this time, the upper parts of the ceiling side plates 23b and 23d are folded back onto the inner surfaces of the inclined plates 23a and 23c and thermally bonded, and the upper ends of the inclined plates 23a and 23c are thermally bonded. As a result, the pair of opposing inclined plates 23a and 23c of the top surface portion 6 form an inclined roof portion, and are fixed in a state of blocking the top surface of the body portion 5.

[0023] 4 is a cross-sectional view showing the layer structure of the blank plate 20. The blank plate 20 is formed by laminating, from the outer surface side, a thermal adhesive resin layer 31, a paper layer 32, an intermediate resin layer 33, an adhesive layer 34, a protective layer 35, a gas barrier layer 36, a barrier substrate layer 37, an adhesive layer 38, and a thermal adhesive resin layer 39.

[0024] The paper layer 32 has a basis weight of, for example, 130 to 450 g / m 2 The paper layer 32 is made of a paperboard. The thermal adhesive resin layer 31 is made of a thermoplastic resin and is disposed on the outer surface of the paper layer 32. The thermal adhesive resin layer 31 is made of, for example, low density polyethylene (LDPE) or polyethylene (PE) having a thickness of 15 to 35 μm. The outer surface of the thermal adhesive resin layer 31 is corona treated, and a printing layer (not shown) is formed at a predetermined position by gravure printing or offset printing.

[0025] The intermediate resin layer 33 is formed of, for example, low density polyethylene (LDPE), polyethylene (PE), etc., having a thickness of 15 to 35 μm, and is coated on the paper layer 32. The intermediate resin layer 33 prevents foaming caused by water vapor by allowing water vapor generated from the paper layer 32 to escape during heat bonding when assembling the liquid paper container 1. The heat adhesive resin layer 31 and the intermediate resin layer 33 form a coated paper in which both sides of the paper layer 32 are resin coated. Note that, if foaming is within an acceptable range, the intermediate resin layer 33 may be omitted and the paper layer 32 may be coated with resin on one side.

[0026] The adhesive layer 34 is made of a thermoplastic resin, for example, ethylene-acrylic acid resin (EAA), ethylene-methacrylic acid copolymer resin (EMAA), or the like, having a thickness of 15 to 35 μm. The coated paper and the laminated film on the inner surface are bonded together by the adhesive layer 34. The adhesive layer 34 may be formed from an adhesive for dry lamination or an adhesive for wet lamination.

[0027] The protective layer 35 is made of a resin such as nylon having high puncture resistance, and is laminated on a barrier film described later as necessary. The gas barrier layer 36 is protected by the protective layer 35 against punctures through the cutout portion 10.

[0028] The gas barrier layer 36 is made of a vapor-deposited film deposited on one surface of the barrier substrate layer 37, and the gas barrier layer 36 and the barrier substrate layer 37 form a barrier film. The barrier substrate layer 37 is made of, for example, a polyethylene terephthalate (PET) film or a nylon film having a thickness of 9 to 25 μm.

[0029] The gas barrier layer 36 is formed of a metal vapor deposition film (aluminum vapor deposition film, etc.) or an inorganic oxide vapor deposition film (silica vapor deposition film, alumina vapor deposition film, etc.). The gas barrier layer 36 has gas barrier properties and prevents the intrusion of oxygen, water vapor, etc. into the liquid-storing paper container 1.

[0030] The gas barrier layer 36 is disposed on the outer surface side of the barrier substrate layer 37, and is adjacent to the adhesive layer 34 when the protective layer 35 is omitted. Ethylene-acrylic acid resin and ethylene-methacrylic acid copolymer resin have excellent adhesive properties with metals and oxides. Therefore, the adhesive layer 34 can reliably bond the coated paper and the barrier film.

[0031] Adhesive layer 38 is formed of low density polyethylene (LDPE) or the like having a thickness of 15 to 35 μm, and bonds the film forming thermal adhesive resin layer 39 to the barrier film. Thermal adhesive resin layer 39 is made of a thermoplastic resin, and is formed of a film such as linear low density polyethylene (LLDPE) or ethylene-α-olefin copolymer having a thickness of 15 to 60 μm.

[0032] Further, cutouts 10 are provided at predetermined positions by cutting out the thermal adhesive resin layer 31, the paper layer 32, and the intermediate resin layer 33. If the adhesive layer 34 is made of adhesive, the adhesive may be applied onto the coated paper and then cut out by the cutouts 10.

[0033] The blank plate 20 of the above configuration is folded and opposing thermal adhesive resin layers 39, opposing thermal adhesive resin layers 31, and opposing thermal adhesive resin layers 39 and thermal adhesive resin layers 31 are thermally bonded to each other at predetermined locations, to form the liquid paper container 1.

[0034] 1 to 3, the cutout 10 is provided in the body 5 and the top surface 6. When the gas barrier layer 36 is formed of an inorganic oxide vapor deposition film, the cutout 10 has translucency. This allows the inside to be visually confirmed through the cutout 10. When the cutout 10 does not need to be translucent, the gas barrier layer 36 may be formed of a metal vapor deposition film.

[0035] The cutout portion 10 has a first cutout portion 11 , a second cutout portion 12 , a third cutout portion 13 , a fourth cutout portion 14 , and a fifth cutout portion 15 .

[0036] The first cutouts 11 are formed in the widthwise center of a pair of opposing side panels 22b, 22d in a linear shape extending in the up-down direction. The side panels 22b, 22d in which the first cutouts 11 are provided are adjacent to both sides of the front side panel 22c.

[0037] The second cutout 12 is disposed below the first cutout 11 and is formed in a V-shape that spreads downward. The lower ends of both side edges of the side panels 22b, 22d are disposed on the extension of the second cutout 12 that spreads in a V-shape. The angle of the V-shape of the second cutout 12 is preferably about 90° (about 90°±10°) to facilitate folding, which will be described later. The second cutout 12 is formed to be continuous with the lower end of the first cutout 11, but a vertical gap may be provided between the lower end of the first cutout 11 and the upper end of the second cutout 12.

[0038] The third cutout portion 13 is formed to extend in the width direction of the side panels 22b, 22d from the upper end of the second cutout portion 12. In this embodiment, the third cutout portion 13 extends from the upper end of the second cutout portion 12 to the rear side, but may extend to the front side.

[0039] The fourth cutout 14 is provided in the ceiling side panels 23b and 23d, and is formed in a linear shape such as an oval or a dot shape such as a circle on an extension of the first cutout 11. The fifth cutout 15 is formed in a linear shape extending in the vertical direction on the rear side panel 22a, and is provided to allow the interior to be viewed.

[0040] In the liquid paper container 1 configured as described above, by pressing the fourth cutout portion 14, the ceiling side panels 23b, 23d are bent along the fourth cutout portion 14, and the ceiling side panels 23b, 23d can be easily recessed inward.

[0041] Next, by pressing on the first cutout 11, the side panels 22b, 22d are bent along the first cutout 11, and the side panels 22b, 22d can be easily recessed inward. At this time, the side panels 22b, 22d are also bent on the second cutout 12 and the third cutout 13. When the liquid paper container 1 is subsequently compressed in the front-rear direction, the lower parts of the side panels 22b, 22d are bent so as to overlap the bottom portion 7, and the side panel 22a on the rear side is folded back on the third cutout 13, as shown in FIG.

[0042] By further pressing the bottom surface portion 7 forward, the side plates 22a, 22c and the inclined plates 23a, 23c approach each other and the liquid-containing paper container 1 is folded as shown in the side view of Figure 6. As a result, even if there is only a little viscous liquid remaining, the contents can be pushed out toward the pouring member 4 and discharged to the last.

[0043] In this embodiment, the third cutout portion 13 and the fourth cutout portion 14 may be omitted, but by providing them, the liquid retaining paper container 1 can be made easier to fold.

[0044] According to this embodiment, the side panels 22b, 22d have a first cutout 11 formed in a line extending vertically in the widthwise center, and a second cutout 12 provided below the first cutout 11 and extending in a V-shape widening downward. This makes it possible to easily fold the liquid-containing paper container 1 by recessing the side panels 22b, 22d above the first and second cutouts 11, 12. This allows the liquid-containing paper container 1 to be easily folded. This allows the remaining viscous liquid content to be discharged to the last.

[0045] Furthermore, since the third cutout 13 is provided extending from the upper end of the second cutout 12 in the width direction of the side panels 22b, 22d, the side panel 22a adjacent to the side panels 22b, 22d in the extending direction of the third cutout 13 can be easily folded back relative to the side panels 22b, 22d. Therefore, the liquid paper container 1 can be folded even more easily.

[0046] Furthermore, the fourth cutout 14 provided in the ceiling side panels 23b, 23d of the Gabeltop-type top surface 6 is disposed on an extension of the first cutout 11. Therefore, the ceiling side panels 23b, 23d can be easily folded inward by pressing the fourth cutout 14. This makes it even easier to fold the liquid-holding paper container 1.

[0047] In addition, since the second cutout portion 12 is continuous with the lower end of the first cutout portion 11, the lower portions of the side panels 22b, 22d can be easily folded so as to overlap the bottom portion 7. This makes it even easier to fold the liquid paper container 1.

[0048] In addition, since the lower ends of the side edges of the side panels 22b and 22d are disposed on the extension of the second cutout portion 12, the lower portions of the side panels 22b and 22d can be easily folded so as to overlap the bottom portion 7. This makes it even easier to fold the liquid paper container 1.

[0049] In addition, since the inside can be seen through the cutout portion 10, the remaining amount of the contents can be easily ascertained.

[0050] <Second embodiment> Next, Fig. 7 shows a perspective view of a liquid paper container 1 of a second embodiment. For ease of explanation, the same parts as those of the first embodiment shown in Figs. 1 to 6 are given the same reference numerals. In this embodiment, the cutout portion 10 further has a sixth cutout portion 16, unlike the first embodiment. The other parts are the same as those of the first embodiment.

[0051] The sixth cutout portions 16 are provided on both side edges of the front side panel 22c adjacent to the side panels 22b, 22d in which the first cutout portions 11 of the body portion 5 are provided. In addition, the side panel 22c is provided with a fold line 21a connecting both sixth cutout portions 16.

[0052] This makes it easier for the body 5 to bend inward along the fold line 21a. Therefore, by holding the body 5 in one hand and repeatedly pressing the fold line 21a with one hand, the viscous liquid content can be forcibly discharged. Also, when the remaining content is low, the liquid-containing paper container 1 can be folded in the same way as in the first embodiment to discharge the last of the content.

[0053] <Third embodiment> Next, Fig. 8 shows a perspective view of a liquid-containing paper container 1 of a third embodiment. For ease of explanation, the same parts as those of the first embodiment shown in Figs. 1 to 6 above are given the same reference numerals. Unlike the first embodiment, this embodiment does not have a sloped roof part, and is formed into a rectangular parallelepiped shape with a flat top surface. The other parts are the same as those of the first embodiment.

[0054] The top surface 6 of the liquid-holding paper container 1 is formed by a top surface plate 23e that is parallel to the bottom surface 7. The spouting member 4 is provided on the top surface plate 23e.

[0055] In this embodiment, as in the first embodiment, the liquid-holding paper container 1 can be easily folded by recessing the side panels 22b and 22d on the first and second cutouts 11 and 12. This allows the liquid-holding paper container 1 to be discharged to the last drop of the viscous liquid. Note that in this embodiment, a sixth cutout 16 (see FIG. 7) similar to that in the second embodiment may be provided. [Industrial Applicability]

[0056] The present invention can be used for liquid paper containers that contain viscous liquids such as dressing, ketchup, mayonnaise, shampoo, rinse, and body soap. [Explanation of symbols]

[0057] 1 Liquid paper container 2 Main unit 4. Dispensing member 4a Cap 5. Torso 6 Top section 7 Bottom part 8 Insertion hole 10 Notch 11 First notch 12 Second notch 13 Third notch 14 Fourth notch 15 5th notch 16 6th notch 20 Blank Board 21, 21a fold lines 22a~22d side plate 23a, 23c inclined plate 23b, 23d Ceiling side panel 23e Top plate 24a~24d Bottom plate 25 Glue allowance piece 31 Heat adhesive resin layer 32 Paper layer 33 Intermediate resin layer 34 Adhesive layer 35 Protective layer 36 Gas Barrier Layer 37 Barrier substrate layer 38 Adhesive layer 39 Heat adhesive resin layer

Claims

1. A liquid-storing paper container having a body formed of a laminate of a paper layer, a gas barrier layer, and a thermal adhesive resin layer, and a pouring member for pouring out a content, The main body portion has a cylindrical body portion having a plurality of side panels connected together, a bottom surface portion that closes the bottom surface of the body portion, and a top surface portion that closes the top surface of the body portion, and a notch portion is provided in at least the body portion by cutting out the paper layer, A liquid paper container characterized in that the cutout portion has a first cutout portion formed in a line extending in the vertical direction in the widthwise center of a pair of opposing side panels, and a second cutout portion formed in a V-shape that is arranged below the first cutout and extends downward.

2. The liquid paper container according to claim 1 , wherein the cutout portion has a third cutout portion extending in the width direction of the side panel from an upper end of the second cutout portion.

3. The ceiling portion has a pair of inclined plates that are inclined and opposed to each other and have upper ends bonded to each other, and a pair of ceiling side plates that connect the pair of inclined plates, and the pouring member is formed into a Gabeltop type attached to one of the inclined plates, 3. The liquid paper container according to claim 1, wherein the cutout portion includes a fourth cutout portion provided in the ceiling side panel and disposed on an extension of the first cutout portion.

4. The liquid-holding paper container according to claim 1 or 2, wherein the second cutout portion is continuous with a lower end of the first cutout portion.

5. The liquid-holding paper container according to claim 1 or 2, wherein a lower end of a side edge of the side panel is disposed on an extension of the second cutout portion.

6. 3. The liquid-containing paper container according to claim 1, wherein the inside is visible through the cutout.

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