JP2004276955A - Pouch container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pouch container which can be surely broken by an approximately straight line when it is opened without bringing about decrease in original performance of the container. <P>SOLUTION: The pouch container is composed of a container main body 10 formed into a flat bag-like shape with a flexible sheet 11 and a pair of tear tapes 20 heat-sealed on the inner face side of this container main body 10, and the container main body 10 in which a content is hermetically packaged is cut together with the tear tapes 20 to open the container. The tape 20 is composed of a base material layer having tearing properties in the longitudinal direction, and sealant layers laminated respectively on both surface and back surface of this base material layer, and both side edges in the width direction is heat-sealed on inner face sides of the flexible sheets 11 and 11 in such a way that they pinch a part to be broken of the container main body 10, namely, a breaking line connecting together notches 10a to be a start when it is broken. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pouch container formed in a bag shape by a flexible sheet, and more particularly to a pouch container opened by breaking.
[0002]
[Prior art]
As a pouch container of this type, for example, in a state in which a flexible sheet having a sealant layer laminated on the inner surface side is overlaid, both side edges and a lower edge thereof are heat-sealed with each other, so that a mouth portion is formed at an upper end. After the contents are accommodated, the upper edges of the flexible sheet forming the mouth are heat-sealed to each other, whereby the contents are sealed and packaged. It has become.
[0003]
Also, when taking out the contents sealed and packaged in such a pouch container, the upper end of the pouch container is opened by breaking in the width direction, so that it can be easily broken at the time of opening. In addition, cuts are formed below the heat-sealed upper edge portions above the left and right side edges that are heat-sealed and serve as triggers for breaking.
[0004]
In addition, in order to facilitate taking out the contents from the opened pouch container or to facilitate resealing of the opened pouch container, the cut end of the flexible sheet formed when opening the pouch container is not meandered. In addition, a pouch container is formed by a flexible sheet having a tearable layer laminated in the opening direction, or a tearable tape is applied to the broken portion on the outer surface of the pouch container (flexible sheet) with an adhesive. In general, a method of sticking through an interface is adopted.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. Sho 55-18478
[Problems to be solved by the invention]
However, when a pouch container is formed of a flexible sheet having a tearable layer having tearability in the opening direction laminated thereon, the pouch container is formed in such a manner that impact resistance is reduced and pinholes are easily generated. There is a problem that the physical properties of the flexible sheet are reduced.
[0007]
Further, when a tearing tape having tearability is adhered to the breakable portion on the outer surface of the pouch container via an adhesive, the physical properties do not decrease as in a flexible sheet provided with tearability. However, there is a problem that the rupture tape is peeled off from the pouch container during transportation, or the adhesive is deteriorated (crystallized) during long-term storage, so that the adhesiveness is weakened and the rupture tape is easily peeled off.
[0008]
Therefore, an object of the present invention is to provide a pouch container that can be reliably broken in a substantially linear shape when opened, without lowering the inherent performance of the container.
[0009]
Means for Solving the Problems and Their Effects
In order to solve the above-mentioned problem, the invention according to claim 1 includes a container body that is formed in a bag shape by a flexible sheet having a sealant layer laminated on an inner surface and is opened by breaking in a width direction; A tear tape having a single-layer structure or a multi-layer structure having a heat seal property with respect to the sealant layer of the container body, the tear tape being provided on the inner surface side of the container body. A pouch container characterized by being heat-sealed at a broken portion.
[0010]
As described above, in this pouch container, since the rupture tape having tearability in the longitudinal direction is heat-sealed to the rupture portion on the inner surface side of the container body, the flexibility formed when the pouch container is opened. The cut edge of the sheet does not meander and curve, so that the contents can be easily taken out from the opened pouch container and the opened pouch container can be easily resealed.
[0011]
Furthermore, unlike a conventional pouch container, the flexible sheet itself forming the container body does not necessarily have a tear layer, so that the original performance of the container is not degraded and the tearability is improved. The breakable tape is not affixed to the flexible sheet via an adhesive, but is broken during transportation or long-term storage because the breakable tape is firmly adhered to the container body by heat sealing. The tape is not peeled off from the container body.
[0012]
Further, in order to solve the above problem, the invention according to claim 2 is directed to a container body which is formed in a bag shape by a flexible sheet having a sealant layer laminated on an inner surface side, and is opened by breaking in a width direction. A breakable tape having a single-layer structure or a multi-layer structure having a heat-sealing property with respect to the sealant layer of the container body, wherein the breakage tape sandwiches a broken portion of the container body in a width direction. A pouch container is provided, wherein both side portions are heat-sealed to the inner surface side of the container body. In addition, the both sides in the width direction of the rupture tape that is heat-sealed to the container body means the outer portion of the rupture area in the rupture tape, and are limited to both side edges in the width direction of the rupture tape. is not. Therefore, as long as the breaking tape is heat-sealed so as to sandwich the breaking portion in the container body, unsealed portions may be present on both side edges in the width direction of the breaking tape.
[0013]
As described above, in this pouch container, both sides in the width direction are on the inner surface side of the container body so that the breakable tape having heat sealing property with respect to the sealant layer of the container body sandwiches the broken portion in the container body. Because it is heat-sealed, especially when the tearing tape itself does not have a tearing property in the longitudinal direction, the heat-sealed portion of the tearing tape becomes difficult to tear. By doing so, the cutout of the container body formed does not protrude outside from the heat-sealed portion of the rupture tape, and the container body can be broken in a substantially straight line.
[0014]
Also, in this pouch container, similarly to the pouch container according to the first aspect of the present invention, since the tape for rupture is heat-sealed to the container body, the original performance of the container is not reduced, and the container can be stored during transportation or for a long time. The same effect as the pouch container of the invention according to claim 1 can be obtained, in which the tearing tape does not peel off from the container body during the operation.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. As shown in FIGS. 1 to 4, the pouch container 1 includes a container body 10 formed in a flat bag shape by a flexible sheet 11, and a portion of the inner surface side of the container body 10 that is broken at the time of opening. 5 to 30 mm width, preferably 10 to 20 mm width, comprising a pair of rupture tapes 20 heat-sealed to break the container body 10 in which the contents are hermetically sealed and packaged together with the rupture tape 20. By doing so, it is designed to be opened.
[0016]
As shown in FIG. 1 (a), the container body 10 is formed by heat-sealing the both side edges and the lower edge of each other in a state where a pair of front and back flexible sheets 11 and 11 are overlapped with each other. It is formed in a bag shape having a mouth at the upper end, and after accommodating the contents, the upper edges of the flexible sheets 11 forming the mouth are mutually connected as shown in FIG. By heat-sealing, the contents are hermetically packaged. Note that the hatched portions in FIGS. 7A and 7B indicate the heat seal portions.
[0017]
As described above, the container body 10 has a pair of heat-sealed upper side edges so as not to cover the upper edge heat-sealed portion when the contents are housed and the mouth is heat-sealed. Cuts 10a, 10a are formed, and when opening, the cut 10a is used as a trigger to break the container body 10.
[0018]
As shown in FIG. 2, the flexible sheet 11 forming the container body 10 has a thickness of 10 such as a single-layer film such as a biaxially oriented polypropylene film, a biaxially oriented polyamide film, and a biaxially oriented polyester film. A base layer 11a having a thickness of about 30 to 150 μm and a sealant layer 11b having a thickness of about 30 to 150 μm made of an unstretched polypropylene film or an unstretched polyethylene film laminated on the inner surface side of the base layer 11a. Although a sheet having a layer structure is used, an ethylene / vinyl alcohol copolymer (EVOH), an aluminum foil, an aluminum vapor-deposited film, or the like is provided between the base material layer 11a and the sealant layer 11b according to the contents to be hermetically packaged. It is also possible to provide a single-layer or multiple-layer gas barrier layer consisting of
[0019]
As shown in FIG. 3, the breaking tape 20 has a thickness of 10 to 30 μm, preferably 10 to 20 μm, having a tearing property in the longitudinal direction, and a base layer 21 of 10 to 20 μm. It is composed of laminated sealant layers 22 and 23 having a thickness of 10 to 60 μm, preferably 15 to 30 μm. As shown in FIGS. 1 and 4, a broken portion in the container body 10, that is, a cut 10 a The container body 10 is formed so that both side edges in the width direction have a predetermined width l (1 to 6 mm, preferably 3 to 6 mm) so as to sandwich a breaking line (shown by a dashed line in FIG. 1) connecting the two. The flexible sheets 11, 11 are heat-sealed on the inner surface side. Therefore, the central portion in the width direction of the breaking tape 20 corresponding to the breaking line is not heat-sealed to the flexible sheet 11. In addition, as a method of laminating the sealant layers 22 and 23 on the base material layer 21, a dry lamination method, a melt extrusion lamination method, or the like can be adopted.
[0020]
The base material layer 21 is a uniaxially stretched polypropylene film stretched 5 to 15 times in the longitudinal direction (for example, Noblen ASS [20 μm]: manufactured by Mitsui Chemicals Platech Co., Ltd.) so as to obtain good linear tearability. The sealant layers 22 and 23 are formed of the same resin film as the sealant layer 11 b of the flexible sheet 11. In addition, the base material layer 21 is a polyamide film (for example, Uniathlon TB [15 μm]: manufactured by Idemitsu Unilac Co., Ltd., Emblem NC [15 μm]: Unitika) other than the uniaxially stretched polypropylene film described above, which is mainly stretched in the longitudinal direction. Co., Ltd.), a polyester film (eg, Embret PC [12 μm]: manufactured by Unitika Ltd.), a polyethylene film, and the like.
[0021]
As described above, in the pouch container 1, both sides in the width direction form the container main body 10 so that the tearing tape 20 having tearability in the longitudinal direction sandwiches the broken portion in the container main body 10. Since the inner surfaces of the flexible sheets 11 and 11 are heat-sealed, the cut end of the container body 10 (flexible sheet 11) formed when the pouch container 1 is opened may meander as shown in FIG. Therefore, it is possible to easily take out the contents from the opened pouch container 1 and reseal the opened pouch container 1.
[0022]
In particular, in the pouch container 1, unlike the conventional pouch container, since the flexible sheet 11 itself forming the container body 10 does not have tearability, the pouch container 1 has impact strength and pinhole resistance. The inherent performance of the container is not reduced, and the tearing tape 20 having tearability is not adhered to the flexible sheet 11 via an adhesive. The breakable tape 20 does not peel off from the container body 10 during transportation or long-term storage.
[0023]
Further, since there is no need to provide a tear layer on the flexible sheet 11 forming the container body 10, material costs can be reduced, and the total weight of the pouch container is reduced, which is excellent in environmental aspects. There is an advantage.
[0024]
In the above-described embodiment, a predetermined width is formed on the inner surface of the container body 10 (flexible sheet 11) such that both side edges in the width direction of the tearing tape 20 having tearability sandwich the broken portion of the container body 10. Although it is heat-sealed, the present invention is not limited to this, and the entire surface of the rupture tape 20 can be heat-sealed to the inner surface of the container body 10 (flexible sheet 11). However, if the entire surface of the breaking tape 20 is heat-sealed to the inner surface of the container body 10 (flexible sheet 11), the flexible sheet 11 is likely to wrinkle. It is desirable to keep.
[0025]
In the above-described embodiment, the base layer 21 of the rupture tape 20 has tearability in the longitudinal direction, but is not limited to this, and does not have tearability in a specific direction. It is also possible to use a breaking tape in which a base material layer is formed by a biaxially oriented polypropylene film, a biaxially oriented polyamide film, a biaxially oriented polyester film, or the like. However, when such a breaking tape is used, instead of heat-sealing the entire surface of the breaking tape to the inner surface of the container body 10 (flexible sheet 11), the both sides in the width direction of the breaking tape are It is necessary to heat seal the inner surface of the container body 10 (flexible sheet 11) so as to sandwich the broken part in the container body 10.
[0026]
As described above, the tape for rupture made of a biaxially stretched film in which the base material layer does not have tearability in a specific direction is applied to both sides of the container body 10 in the width direction so as to sandwich the broken part in the container body 10. If the inner surface of the tape is heat-sealed, the breakable tape (base layer) itself does not have tearability in its longitudinal direction, so the heat-sealed portion of the breakable tape is less likely to break, When opening the pouch container, the cutout of the container body 10 formed by breaking does not protrude outward from the heat-sealed portion of the breaking tape, so that the container body 10 can be broken substantially linearly.
[0027]
Further, in each of the above-described embodiments, although a tear tape having a multilayer structure in which a sealant layer is laminated on both the front and back surfaces of the base material layer is used, the present invention is not limited to this, and is stretched in the longitudinal direction. It is also possible to use a single-layered breaking tape made of a polyethylene film, a polypropylene film, or the like.
[0028]
In the above-described embodiment, the container body 10 has been described as the pouch container 1 having a flat bag shape. However, the present invention is not limited to this. If the container body 10 is opened by breaking the container body, the container body 10 The present invention can be applied to pouch containers of various shapes such as a bottom gusset bag and a side gusset bag.
[Brief description of the drawings]
FIG. 1 (a) is a front view showing an embodiment of a pouch container according to the present invention, and FIG. 1 (b) is a front view showing a state in which contents are stored in the same pouch container and hermetically sealed.
FIG. 2 is a sectional view showing a flexible sheet constituting the pouch container.
FIG. 3 is a cross-sectional view showing a tearing tape constituting the pouch container.
FIG. 4 is a partial cross-sectional view showing a heat-sealed state of the rupture tape with respect to the flexible sheet in the pouch container.
FIG. 5 is a front view showing a state where the pouch container is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pouch container 10 Container main body 10a Cut 11 Flexible sheet 11a Base layer 11b Sealant layer 20 Breaking tape 21 Base layers 22, 23 Sealant layer

Claims (2)

A container body formed in a bag shape by a flexible sheet having a sealant layer laminated on the inner surface side, and opened by breaking in the width direction,
Having a tear property in the longitudinal direction, comprising a tear tape of a single-layer structure or a multi-layer structure having heat sealability to the sealant layer of the container body,
The pouch container, wherein the breaking tape is heat-sealed at a broken portion on the inner surface side of the container body. A container body formed in a bag shape by a flexible sheet having a sealant layer laminated on the inner surface side, and opened by breaking in the width direction,
With a breakable tape of a single-layer structure or a multi-layer structure having a heat seal property to the sealant layer of the container body,
The pouch container, wherein the breaking tape is heat-sealed on both sides in the width direction to the inner surface side of the container body so as to sandwich the broken portion in the container body.

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