JP2018172128A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gable top paper container with gable roof whose easy opening mouth improves the convenience of users without impairing sealability.SOLUTION: A gable wall forming panel 7, folded inside between gable roof forming panels 5 and 6, has a first easy peel-off region 21 on the inner surface of inner top sealed panel 17, leaving end sealed areas 24, and second easy peel-off regions 22 and 23 formed on the inner surface of the outer top sealed panels 13 and 14 respectively. Extention parts 21a, 22a, and 23a, inclining toward trunk panel 2, are formed on both ends of the first easy peel-off region 21 and on ends of the second easy peel-off regions 22 and 23 closer to the inner top sealed panel 17. It is arranged that top edges of both ends of the first easy peel-off region 21 overlap with top edges of ends of the second easy peel-off regions 22 and 23 closer to the inner top sealed panel 17 respectively when the outer top sealed panels 13 and 14 are overlapped with the inner top sealed panel 17 respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a paper container called a gable-top type having a gable roof-shaped top portion that contains a beverage liquid such as milk or fruit juice juice.

FIG. 5 shows a paper container 1 called a gable top type, FIG. 6 shows an unsealed state of the paper container 1 shown in FIG. 5, and FIG. 7 shows a development of a main part of the inner surface of the conventional paper container shown in FIG. Yes.
This type of paper container 1 is made of a paperboard material in which a thermoplastic resin is laminated on both sides, four body panels 2 are each folded from a vertical fold line 3, and one side and the other side body panel 2 are glued. It is joined by a vertical seal panel 4 serving as a substitute and formed into a cylindrical body having a square cross section.

  Moreover, on each upper end which opposes the four trunk | drum panels 2, a pair of gable roof forming panels 5 and 6 which oppose, and a pair of opposing gable wall which will be folded between these gable roof forming panels 5 and 6 Forming panels 7 and 8 are connected to each other via a horizontal folding line 10. Belt-shaped outer top seal panels 13 and 14 are provided at the upper ends of the gable roof forming panels 5 and 6 via horizontal folding lines 11 and 12, respectively, and the horizontal folding lines 15 are also provided at the upper ends of the wife wall forming panels 7 and 8, respectively. , 16 are provided with belt-like inner top seal panels 17, 18. The height of the band of the inner top seal panels 17 and 18 is formed lower than that of the outer top seal panels 13 and 14.

  And the gable wall formation panels 7 and 8 are folded between the gable roof formation panels 5 and 6, and the opposing surfaces of the opposing outer top seal panels 13 and 14 and the inner top seal panels 17 and 18 are heat-sealed. At the same time, the opposing surfaces of the outer top seal panels 13 and 14 and the opposing surfaces of the inner top seal panels 17 and 18 are also heat-sealed to form the gable roof top 19.

  In opening the paper container 1 formed in this way, first, one of the gable roof forming panels 5 and 6 and the gable roof forming panels 5 and 6 is folded and the opposing surfaces are sealed. Pick up the wife wall forming panel 7 with both hands and peel it apart (primary opening), then push the inner wall sealing panel 7 forward with your thumb and forefinger to bring the inner top seal panel 17 outward The top seal panels 13 and 14 are peeled off (secondary opening), and one end wall forming panel 7 is pulled out to the end (tertiary opening) to form an opening 20 serving as a spout (see FIG. 6).

  In order to facilitate such opening, the inner top seal panel 17 of the one end wall forming panel 7 pulled out to open the opening 20 and a pair of gables facing the inner top seal panel 17 are provided. On the surface of the roof forming panels 5, 6 facing the outer top seal panels 13, 14, a first easily peelable area 21 is provided on the inner top seal panel 17, and the second top seal panels 13, 14 have a second easy crack. Peeling regions 22 and 23 are provided, and the inner top seal panel 17 and the outer top seal panels 13 and 14 are heat-sealed via the first easily peelable region 21 and the second easily peelable regions 22 and 23.

  Conventionally, the inner top seal panel 17 of the one end wall forming panel 7 that is pulled out to open the opening 20 and the outer top seal panels 13 and 14 of the pair of gable roof forming panels 5 and 6 located on both sides thereof. As shown in FIG. 7, the first easily peelable area 21 and the second easily peelable areas 22, 23 provided on the surface facing the inner surface of the inner top seal panel 17 have predetermined lateral widths at both ends in the lateral length direction. A first easily peelable region 21 is provided leaving the end seal region 24 of A, and a predetermined length is provided on the inner surface of the outer top seal panels 13 and 14 in a portion that is approximately half the length in the lateral length direction and closer to the inner top seal panel 17. Is known in which first easy-to-peel regions 22 and 23 are provided leaving the end seal regions 25 and 26 having a lateral width B (see, for example, Patent Document 1).

  The lateral width A of the end seal region 24 existing at both ends of the first easy peel region 21 provided on the inner top seal panel 17 and the second easy peel provided on the outer top seal panels 13 and 14 on both sides thereof. If the lateral width B of the end seal regions 25 and 26 existing near the inner top seal panel 17 in the regions 22 and 23 is narrow, the inner top seal panel 17 and the outer top seal panels 13 and 14 can be easily separated. On the other hand, the sealing properties of the inner top seal panel 17 and the outer top seal panels 13 and 14 are lowered, and there is a risk of causing liquid leakage. Therefore, the lateral widths A and B of the end seal regions 24, 25, and 26 are set as widths that maintain at least the sealing performance of the inner top seal panel 17 and the outer top seal panels 13 and 14 and do not cause liquid leakage.

  In the paper container 1 described in the above-mentioned patent document 1, it exists in the edge part seal region 24 which exists in the both ends of the 1st easy peeling area | region 21, and the inner top seal panel 17 edge part of the 2nd easy peeling area | regions 22 and 23. The lateral widths A and B of the end seal areas 25 and 26 are widths that maintain the sealing properties of the inner top seal panel 17 and the outer top seal panels 13 and 14 and do not cause liquid leakage. When pulling out the end wall forming panel 7, it becomes difficult to peel off the end seal areas 24, 25, 26 between the inner top seal panel 17 and the outer top seal panels 13, 14, and the opening 20 cannot be opened widely. The inner top seal panel 17 of the end wall forming panel 7 serving as the spout must be picked and opened. Moreover, such a way of opening is not preferable in terms of hygiene.

  As a result of repeated researches to solve such problems, the applicant of the present application has conducted a test research to enable easy peeling while maintaining the sealing performance of the inner top seal panel 17 and the outer top seal panels 13 and 14. As a result, the sealing performance that does not cause liquid leakage in the end seal areas 24, 25, and 26 is mainly in the horizontal widths A and B, and the width of the vertical width C has little influence on the sealing performance to prevent liquid leakage. As shown in FIG. 8, the end seals 24 located at both ends of the first easily peelable region 21 and the end seals present at the end portions closer to the inner top seal panel 17 of the second easily peelable regions 22, 23. An extension portion 21a of the first easy peel region 21 and extension portions 22a and 23a of the second peel regions 22 and 23 are respectively provided in a part of the regions 25 and 26 near the body panel 2 in the longitudinal direction. Extension 2 of region 21 a and the extension portions 22a and 23a of the second peeling regions 22 and 23, the upper side of which is a longitudinally longitudinal body panel with the upper sides facing downward from the upper ends of the first easy peeling region 21 and the second peeling regions 22 and 23. A paper container that is inclined so that the length near 2 is long is proposed (for example, see Patent Document 2).

JP 2000-79939 A Japanese Patent No. 5943473

  According to the paper container 1 described in Patent Document 2, compared to the paper container 1 described in Patent Document 1, the end seal regions 24 that exist at both ends of the first easy-release region 21 and the second easy-release region The peelability of the end seal areas 25 and 26 existing at the end portions of the inner top seal panels 17 of 22 and 23 was improved.

However, the vertical width of the second easily peelable areas 22 and 23 is narrower than that of the first easily peelable area 21, and the end wall forming panel 7 is folded between the gable roof forming panels 5 and 6 to form the outer top seal panels 13 and 14. When the inner top seal panel 17 is overlapped, the upper ends of both end portions of the first easy peel region 21 do not coincide with the upper ends of the end portions near the inner top seal panel 17 in the second easy peel regions 22 and 23.
The upper ends of the first easily peelable area 21 and the second easily peelable areas 22 and 23 are the beginning of the secondary opening when the secondary opening is performed to peel the inner top seal panel 17 from the outer top seal panels 13 and 14. Since the upper ends of the first easily peelable region 21 and the second easily peelable regions 22 and 23 do not coincide with each other, the peel strength of the same portion which does not coincide is in a high state. There was a case that could not be done.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a paper container having a user-friendly convenience by opening the opening easily when opening the gable-top type paper container having a gable roof-shaped top without impairing the sealing performance.

  In order to achieve the above object, the invention described in claim 1 is made of a paperboard material in which a thermoplastic resin is laminated on both sides, and includes four body panels, the edges of which are joined by vertical seal panels. A pair of gable roof forming panels that have a strip-shaped outer top seal panel at the upper end at the upper end of the trunk panel and are opposed to each other, and lower than the outer top seal panel. A pair of facing wall-forming panels having a belt-shaped inner top seal panel having a height and being opposed to each other, and the facing-wall forming panel is folded between the gable roof-forming panels, and the facing outer top seals are opposed to each other The opposing surfaces of the panel and the inner top seal panel are sealed, and the opposing surfaces of the outer top seal panel and the opposing surfaces of the inner top seal panel are Both ends in the lateral direction are formed on the inner surface of the inner top seal panel of one end wall forming panel of the end wall forming panels that are formed between the end roof forming panels. A first easily peelable area coated with an easily peelable agent leaving an end seal area of a predetermined width is provided on the inner surface of the outer top seal panel of the pair of gable roof forming panels located on both sides thereof. An easy release agent that is overlapped with the first easy release region is applied to a portion near the inner top seal panel in approximately half of the length direction, leaving an end seal region of a predetermined lateral width near the inner top seal panel. 2 easy-peeling areas are provided, and when opening, the wife wall forming panel on the side having the inner top seal panel provided with the second easy-peeling area is pulled out and opened. A paper container, wherein both the end portions of the first easy-peeling region and the end portions near the inner top seal panel in the second easy-peeling region become longer toward the body panel from above to below. Inclined extensions are provided, respectively, and the first and second easy peel areas are at least near the upper ends of both ends of the first easy peel area and the inner top seal panel in the second easy peel area. The upper ends of the end portions are provided so as to coincide with each other when the opposing surfaces of the outer top seal panel and the inner top seal panel are overlapped with each other.

  The invention according to claim 2 is characterized in that the vertical width of the second easy peel region according to claim 1 is 17 to 100% of the vertical width of the first easy peel region. .

  According to a third aspect of the present invention, in the first or second aspect, the shape of the extension provided at both ends of the first easily peelable region and the inner top seal panel side edge in the second easily peelable region The shape of the extension part provided in the part is the same.

  According to the paper container of claim 1, the both ends of the first easy peeling region and the inner top seal panel close end in the second easy peeling region are closer to the body panel from the upper side to the lower side. Since the extension portions that are inclined so as to be longer are provided, the inclination direction of the upper side of the extension portions of the first and second easily peelable regions is the inner top seal panel and the outer side when the wife wall forming panel is pulled out. It will be along the peeling progress direction of the end seal area existing in the top seal panel, and the end seal area in the outer top seal panel and the inner top seal panel can be easily peeled off.

  Further, the first and second easily peelable regions have at least upper ends of both end portions of the first easily peelable region and upper ends of end portions closer to the inner top seal panel in the second easily peelable region and the outer top seal panel. Since it is provided so as to coincide when the opposing surfaces of the inner top seal panel are overlapped with each other, when the secondary opening is performed to peel the inner top seal panel from the outer top seal panel, the second opening is started. The peel strength at the seal portion at the upper end of the first easy peel region and the second easy peel region is low. As a result, when the wife wall forming panel is pushed forward with the thumb and forefinger, it is possible to easily generate peeling that triggers extrusion at the upper end portions of the first easy peeling area and the second easy peeling area. The peeling of the secondary opening can be started smoothly, and the opening of the opening can be easily and reliably performed when the paper container is opened.

  According to the paper container of claim 2, since the vertical width of the second easy peel region according to claim 1 is 17 to 100% of the vertical width of the first easy peel region, When the opposing surfaces of the outer top seal panel and the inner top seal panel are overlapped, the first easily peelable region and the second easily peelable region will be sealed in a state of being surely overlapped, Since the peel strength of the seal portion where the first easy peel region and the second easy peel region overlap is low, the inner top seal panel can be easily peeled from the outer top seal panel.

  According to the paper container of Claim 3, the shape of the extension part provided in the both ends of the said 1st easily peelable area | region of Claim 1 or 2, and the said inner top seal in the said 2nd easily peelable area | region Since the shape of the extension portion provided at the end near the panel is the same, when the opposing surfaces of the outer top seal panel and the inner top seal panel are overlapped, the first easy-release region and the Since the extension portion of the second easy peeling region is surely overlapped, the peel strength of the sealing portion of the first easy peeling region and the second easy peeling region is reduced, so that the inner top seal panel Can be more easily removed from the outer top seal panel.

It is an inner surface principal part expanded view which shows the 1st example of embodiment of the paper container which concerns on this invention. It is an inner surface principal part expanded view which shows the 2nd example of embodiment of the paper container which concerns on this invention. It is an inner surface principal part expanded view which shows the 3rd example of embodiment of the paper container which concerns on this invention. It is an inner surface principal part expanded view which shows the 4th example of embodiment of the paper container which concerns on this invention. It is a perspective view which shows the conventional gable top type paper container. It is explanatory drawing which shows the open state of the conventional paper container. It is an inner surface principal part expanded view of the conventional paper container. It is an inner surface principal part expanded view of the other conventional paper container.

Hereinafter, an example of an embodiment of a paper container according to the present invention will be described in detail with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to the part corresponding to the prior art example shown in FIGS.
FIG. 1 is a development of an essential part of an inner surface showing an example of an embodiment of a paper container according to the present invention. In the paper container 1 of this example, one end wall forming panel 7 that is pulled out to open an opening 20 is provided. The inner top seal panel 17 is provided with a first easy-release region 21 by applying an easy-release agent to the inner surface of the inner top seal panel 17 so as to leave the end seal regions 24 having a predetermined width A at both ends in the lateral length direction. A portion of the inner surface of the outer top seal panels 13, 14 of the pair of gable roof forming panels 5, 6 located on both sides of the outer wall 17, and a portion closer to the inner top seal panel 17 (gable roof forming panels 5, 6). When the end wall forming panels 7 and 8 are folded in between, the end seal areas 25 and 26 having a predetermined width B are left on the side close to the inner top seal panel 17 on the surface facing the inner top seal panel 17. The second peelable regions 22 and 23 are provided easy release agent is applied.

  Then, in the end seal regions 24 existing at both ends of the first easily peelable region 21 provided on the inner top seal panel 17, a portion closer to the body panel 2 in the longitudinal direction (under the end of the first easily peelable region 21). The extension portion 21a of the first easy-peeling region 21 is provided in the first portion. Similarly, in the end seal regions 25 and 26 existing at the end portions closer to the inner top seal panel 17 of the second easily peelable regions 22 and 23 provided on the outer top seal panels 13 and 14 on both sides of the inner top seal panel 17. The extension portions 22a and 23a of the second easily peelable regions 22 and 23 are provided in a part near the body panel 2 in the longitudinal direction (lower portions of the end portions of the second easily peelable regions 22 and 23).

The upper part of the extension part 21a of the first easy-peeling area 21 and the extension parts 22a and 23a of the second peelable areas 22 and 23 are below the upper ends of the first easy-peelable area 21 and the second peelable areas 22 and 23 from below. It is inclined so that the lengthwise direction body panel 2 side becomes longer toward the front.
In this example, the extension portions 21a, 22a, and 23a have a triangular shape whose upper sides are inclined downward from above the end portions of the first easy-release region 21 and the second peel regions 22 and 23.

  Moreover, in this example, between the extension part 21a of the 1st easy peeling area | region 21 and the extension part 22a of the 2nd easy peeling area | region 22, the extension part 21a of the 1st easy peeling area | region 21 and the extension of the 2nd easy peeling area | region 23 are used. Although the part 23a is not connected, the extension part 21a and the extension part 22a, or the extension part 21a and the tip of the extension part 23a may be connected.

Further, the first easily peelable area 21 and the second easily peelable areas 22, 23 are at least the upper end 21 b at both ends of the first easily peelable area 21 and the end portion near the inner top seal panel 17 in the second easily peelable areas 22, 23. The upper ends 22b and 23b are provided so as to coincide when the opposing surfaces of the outer top seal panels 13 and 14 and the inner top seal panel 17 are overlapped.
In this example, as shown in FIG. 1, the vertical width H1 of the first easy peeling region 21 and the vertical width H2 of the second easy peeling regions 22 and 23 are the same, and the first easy peeling region 21 The shapes of the extension portions 21a provided at both ends of the first and second extension portions 22a and 23 are the same as the shapes of the extension portions 22a and 23a provided at the end portions closer to the inner top seal panel 17 in the second easily peelable regions 22 and 23.

In this example, the vertical width H1 of the first easy-peeling region 21 and the vertical width H2 of the second easy-peeling regions 22 and 23 are the same width, but they are not necessarily the same width. It is preferable that the vertical width H2 of the second easy peeling regions 22 and 23 is 17 to 100% of the vertical width H1 of the first easy peeling region 21.
FIGS. 2 to 4 show examples in which the vertical width H2 of the second easy peeling regions 22 and 23 is shorter than the vertical width H1 of the first easy peeling region 21. FIG.

  According to the paper container 1 of the present example configured as described above, the both ends of the first easily peelable region 21 and the end portions closer to the inner top seal panel 17 in the second easily peelable regions 22 and 23 are directed from above to below. Extension portions 21a, 22a, and 23a that are inclined so as to be closer to the body panel 2 are provided, so that the extension portions 21a, 22a, and 23a of the first and second easily peelable regions 21, 22, and 23 are provided. The inclination direction of the upper side will be along the peeling progress direction of the end seal areas 24, 25, 26 existing in the inner top seal panel 17 and the outer top seal panels 13, 14 when pulling out the end wall forming panel 7, The end seal areas 24, 25 and 26 in the inner top seal panel 17 and the outer top seal panels 13 and 14 can be easily peeled off.

  Further, the first easily peelable area 21 and the second easily peelable areas 22, 23 are at the upper end 21 b at both ends of the first easily peelable area 21 and at the end near the inner top seal panel 17 in the second easily peelable areas 22, 23. Since the upper ends 22b and 23b are provided so as to coincide with each other when the opposing surfaces of the inner top seal panel 17 and the outer top seal panels 13 and 14 are overlapped, the inner top seal panel 17 is connected to the outer top seal panel 13, 14 at the time of secondary opening peeled off 14, the upper end 21b at both ends of the first easy-release region 21 and the upper end 22b at the end closer to the inner top seal panel 17 in the second easy-release regions 22, 23 The peel strength at the seal portion 23b is lowered.

  Thus, when the wife wall forming panel 7 is pushed out with the thumb and forefinger, the upper end 21b at both ends of the first easy-peeling region 21 and the end portion closer to the inner top seal panel 17 in the second easy-peeling regions 22, 23 Exfoliation that triggers extrusion can be easily generated at the upper end portions 22b and 23b.

  Further, in this example, the vertical width H1 of the first easily peelable area 21 and the vertical width H2 of the second easily peelable areas 22 and 23 are the same width, and are provided at both ends of the first easily peelable area 21. Since the shape of the extended portion 21a and the shapes of the extended portions 22a and 23a provided at the end portions closer to the inner top seal panel 17 in the second easily peelable regions 22 and 23 are the same, When the opposing surfaces of the outer top seal panels 13 and 14 are overlapped, the first easy-peeling region 21 and the second easy-peeling regions 22 and 23 are sealed in a state of being surely overlapped. The peel strength of the seal portion where the peel region 21 and the second easy peel regions 22 and 23 overlap is reduced, and the inner top seal panel 17 can be easily peeled from the outer top seal panels 13 and 14.

  Further, even when the vertical width H2 of the second easy peeling region 22, 23 is 17 to 100% of the vertical width H1 of the first easy peeling region 21, the inner top seal panel 17 and the outer top seal panels 13, 14 are opposed to each other. When the surfaces are overlapped, the first easy peel region 21 and the second easy peel region 22, 23 are sealed in a state of being surely overlapped, and the first easy peel region 21 and the second easy peel region 22. , 23 is reduced in peel strength, and the inner top seal panel 17 can be easily peeled from the outer top seal panels 13, 14.

Below, the following samples in which the vertical width H2 of the second easy-peeling regions 22 and 23 is 17 to 100% of the vertical width H1 of the first easy-peelable region 21 were created and verified for ease of peeling.
[sample]
Five types of samples were prepared in which the vertical width H2 of the second easy peeling regions 22 and 23 was 15%, 20%, 50%, 80%, and 100% of the vertical width H1 of the first easy peeling region 21.
[Method of verification]
The sample heat-sealed using the top seal apparatus of a filling machine was opened by 10 panelists, and the opening evaluation was performed.
[Evaluation]
A: All 10 people evaluated that it was easy to open.
O: There were 6 to 9 people who evaluated it as easy to open.
(Triangle | delta): There were 5 or less people who evaluated that it was easy to open.
X: No one evaluated that it was easy to open.

DESCRIPTION OF SYMBOLS 1 Paper container 2 Trunk part panel 3 Vertical folding line 4 Vertical sealing panel 5, 6 Gable roof forming panel 7, 8 Tail wall forming panel 10, 11, 12 Horizontal folding line 13, 14 Outside top sealing panel 15, 16 Horizontal folding line 17, 18 Inner top seal panel 19 Gable roof-shaped top portion 20 Opening portion 21 First easily peelable region 21a Extension portion 21b Upper end portion 22, 23 Second easily peelable region 22a, 23a Extension portion 22b, 23b Upper end portion 24, 25, 26 End seal region A , B End seal area width C End seal area length H1 Vertical width H1 of first easy peel area H2 Vertical width of second easy peel area

Claims (3)

It consists of a paperboard material with thermoplastic resin laminated on both sides, and it has four barrel panels, the edges of which are joined by vertical seal panels to form a cylindrical body with a rectangular cross section, and the upper end of the barrel panel A pair of gable roof forming panels having a strip-shaped outer top seal panel at the top and facing each other, and a pair of wives having a strip-shaped inner top seal panel having a lower height than the outer top seal panel and facing each other A wall-forming panel is continuously provided, the gable wall-forming panel is folded between the gable roof-forming panels, the opposing surfaces of the outer top seal panel and the inner top seal panel facing each other are sealed, and the The facing surfaces of the outer top seal panel and the facing surfaces of the inner top seal panel are sealed to form a gable roof-shaped top, and the gable roof is formed. An easy-release agent leaving an end seal area of a predetermined lateral width at both ends in the lateral length direction on the inner surface of the inner top seal panel of one of the end wall forming panels folded between the flanks Is provided in a portion near the inner top seal panel in approximately half of the lateral length direction on the inner surface of the outer top seal panel of the pair of gable roof forming panels located on both sides thereof. A second easy-peeling region coated with an easy-peeling agent that overlaps the first easy-peeling region, leaving an end seal region of a predetermined lateral width near the inner top seal panel, and when opened, the first 2 is a paper container that draws out the end wall forming panel on the side having the inner top seal panel provided with an easily peelable area and makes it an opening,
Extension portions that are inclined so that the barrel panel side becomes longer from the upper side to the lower side are provided at both ends of the first easy peeling region and the inner top seal panel side end portion in the second easy peeling region, respectively. And
Further, the first and second easily peelable regions have at least upper ends of both end portions of the first easily peelable region and upper ends of end portions closer to the inner top seal panel in the second easily peelable region. And the inner top seal panel, the paper containers are provided so as to coincide with each other when they are overlapped.   2. The paper container according to claim 1, wherein a vertical width of the second easy peeling region is 17 to 100% of a vertical width of the first easy peeling region. The shape of the extension provided at both ends of the first easy peel region and the shape of the extension provided at the end near the inner top seal panel in the second easy peel region are the same. The paper container according to claim 1 or 2.

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