JP5168520B2

JP5168520B2 - Fluid packaging container

Info

Publication number: JP5168520B2
Application number: JP2010034133A
Authority: JP
Inventors: 資治冨上; 崇進藤; 早絵新谷
Original assignee: Kisco Co Ltd
Current assignee: Kisco Co Ltd
Priority date: 2010-02-18
Filing date: 2010-02-18
Publication date: 2013-03-21
Anticipated expiration: 2027-12-13
Also published as: JP2010111441A

Description

本発明は、シャンプーなどの液体洗剤、飲料などの流体を収納する流体包装容器に関する。 The present invention relates to a fluid packaging container for storing fluids such as liquid detergents such as shampoos and beverages.

周囲縁辺を熱圧着等で密閉する二枚重ねあるいは自立型の袋体に流体を収容し、袋体角部に向けて設けた注出案内路の先端を切開いて注ぎ出す流体容器はシャンプーなどの液体洗剤や各種飲料の詰め替え用包装容器として多用されている。
この種の流体包装容器は、先細の注出案内路先端部を切取線に沿って切開し、注出口を下向きにして内容物を注ぎ出すものであるところから、内容物が注出案内路からスムーズに安定して流出することが求められる。
ところが、この種の流体容器は合成樹脂フイルムなどの軟質素材を使用した袋体からなり、通常は内容物を袋の下部に滞留させ、注出案内路を含む袋体上部の表裏フイルムが接触しているため、袋体を逆様にしたときに、流体が流下しにくく、注出案内路付近に生ずる不規則な皺や折れ目により流路が閉塞し易いという問題があリ、また、無理な圧力をかけると注出方向が定まらない、といった不都合もあった。 The fluid container is a liquid detergent such as shampoo that contains the fluid in a two-ply or self-supporting bag body that seals the peripheral edge by thermocompression bonding, etc. It is often used as a packaging container for refilling various beverages.
This type of fluid packaging container is designed to incline the tip of the tapered dispensing guide path along the cutoff line and pour out the contents with the dispensing port facing downward, so that the contents can be smoothly removed from the dispensing guide path. Therefore, it is required to flow out stably.
However, this type of fluid container consists of a bag made of a soft material such as a synthetic resin film. Normally, the contents stay in the lower part of the bag and the front and back films on the upper part of the bag, including the pouring guide path, come into contact. Therefore, when the bag body is reversed, the fluid is difficult to flow down, and there is a problem that the flow path is likely to be blocked due to irregular creases and creases that occur in the vicinity of the dispensing guide path. There was also the inconvenience that the direction of pouring could not be determined if pressure was applied.

この問題を解決するために種々の試みがなされており、例えば、注出案内路の外側あるいは内側に、開口補助機構や凸状エンボス加工をした折り曲がり防止機構を設けたもの（特開平７−２２６０号公報、特開平１１−１１４９８号公報）、注出案内路の基材に補助層を設けたもの、（特開２００４−３３８７５３号公報）が知られている。
これらのものは注出案内路の成形に付加的な部材や工程を必要とするためコスト高や資源の無駄をまねき、また、使い捨ての際に嵩高になるという問題があった。 Various attempts have been made to solve this problem. For example, an arrangement in which an opening assisting mechanism or a bend prevention mechanism having a convex embossing is provided on the outside or inside of the pouring guide path (Japanese Patent Laid-Open No. Hei 7-2009). No. 2260, Japanese Patent Laid-Open No. 11-11498), and an auxiliary layer provided on the base material of the pouring guide path (Japanese Patent Laid-Open No. 2004-338753) are known.
Since these materials require additional members and processes for forming the pouring guide path, there is a problem in that costs are increased and resources are wasted.

さらに、特開２００３−２６７４０４号公報には注出案内路に付設した補助層部分を予め外側へ膨らませた凸部に形成したものが開示されている。
このものも、合成樹脂製袋のシートに予め凸面を形成するのに袋の成形に付加工程が必要でコスト高になるだけでなく、このような膨らみ部は袋体の内側から見れば局部的な凹部であるから、この凹部に流体が残留し易いという不都合もあった。 Further, Japanese Patent Application Laid-Open No. 2003-267404 discloses a structure in which an auxiliary layer portion attached to the extraction guide path is formed in a convex portion that is expanded outward in advance.
This also requires an additional process for forming the bag in order to form the convex surface in advance on the synthetic resin bag sheet, which increases the cost, and such a bulging portion is localized when viewed from the inside of the bag body. Since this is a concave portion, there is also a disadvantage that fluid easily remains in the concave portion.

特開平７−２２６０号公報JP 7-2260 A 特開平１１−１１４９８号公報Japanese Patent Laid-Open No. 11-11498 特開２００４−３３８７５３号公報Japanese Patent Laid-Open No. 2004-338753 特開２００３−２６７４０４号公報JP 2003-267404 A

したがって、本発明の目的は、袋体の特定の縁辺形状と流体内容物の流下時の自重で袋体注出案内路基部の所定位置に復元可能な弾力性えくぼが生成され、この弾力性えくぼにより注出案内路に流路の拡張部が反復的に復元可能に形成されるようにした流体包装容器を提供することにある。 Accordingly, an object of the present invention is to generate a resilient dimple that can be restored to a predetermined position on the base of the bag extraction guide path by a specific edge shape of the bag and its own weight when the fluid contents flow down, and this elastic dimple. Accordingly, an object of the present invention is to provide a fluid packaging container in which an extended portion of a flow path is formed so as to be able to be repetitively restored in a dispensing guide path.

上記目的を達成するために、本発明の流体包装容器は、ナイロン、ポリエチレン、ポリエチレンテレフタレートその他の合成樹脂フイルムの単層又はこれらの２種以上の積層シート、もしくはこれら積層シート間にアルミ箔層、アルミ蒸着フイルム層又はシリカ蒸着フイルム層を介在させた積層シートからなる厚さ１００〜２５０ミクロンの合成樹脂可撓シートを重ね合わせた表・裏の合成樹脂可撓シート間に流体収容部を設けて周縁辺を密閉する略方形の袋体を有し、この袋体の一方の側部密閉縁辺を内部流体収容部底部から方形角部まで延びる緩やかな凹状円弧湾曲縁辺に形成し、このように形成した前記一方の側部密閉縁辺と、前記方形角部に向けて緩やかに傾斜させた上部密閉縁辺とからなる先細の注出案内路を形成するとともに、前記上部密閉縁辺の注出案内路基部付近に、袋体内側へ絞り込んだ段差湾曲部を形成し、袋体の注出案内路を下向きにしたときに、袋体の前記縁辺形状と、袋体シート基材の可撓性と、下方へ流下する流体自重により袋体の前記上部密閉縁辺の段差湾曲部から袋体シート基材の内側へ向かう復元可能な弾性えくぼが形成され、この弾性えくぼによる弾力変形で前記注出案内路が表・裏両側へ復元可能に拡張される構成にしたことを特徴とする。 In order to achieve the above object, the fluid packaging container of the present invention comprises a single layer of nylon, polyethylene, polyethylene terephthalate or other synthetic resin film, or a laminate sheet of two or more of these, or an aluminum foil layer between these laminate sheets, A fluid container is provided between the front and back synthetic resin flexible sheets, which are laminated with synthetic resin flexible sheets having a thickness of 100 to 250 microns, which are made of a laminated sheet with an aluminum vapor deposition film layer or a silica vapor deposition film layer interposed therebetween. A substantially rectangular bag body that seals the peripheral edge is formed, and one side sealing edge of the bag body is formed as a gently concave arc-curved edge extending from the bottom of the internal fluid storage part to the square corner, and thus formed wherein the one side sealed edges that, to form the tapered dispensing guideway consisting of an upper sealing edge, which is gently inclined toward the square corner, Guideway near the base dispense the serial upper sealing edge, when the step is formed curved portion narrowed down to the bag interior, and the dispensing guide path of the bag body downwards, and the edge shape of the bag body, the bag body Due to the flexibility of the sheet base material and the weight of the fluid flowing downward, an elastic dimple that can be restored from the step curved portion of the upper sealing edge of the bag body toward the inside of the bag sheet base material is formed. It is characterized in that the pouring guide path is expanded so as to be restored to both the front and back sides by elastic deformation.

袋体の前記段差湾曲部から袋体シート基材の内側へ向かう復元可能な弾性えくぼを形成し、この弾性えくぼによる弾力変形で前記注出案内路を表・裏両側へ復元可能に拡張させるために、本発明の流体包装容器に使用される袋体の表・裏基材は、ナイロン、ポリエチレン、ポリエチレンテレフタレートその他の合成樹脂フイルムの単層シート又はこれらの２種以上の積層シート、もしくはこれら積層シート間にアルミ箔層、アルミ蒸着フイルム層又はシリカ蒸着フイルム層を介在させた積層シートからなる厚さ１００〜２５０ミクロンの合成樹脂可撓シートが好ましい。 In order to form an elastic dimple that can be restored from the step curved portion of the bag body toward the inside of the bag sheet base material, and to elastically deform the extraction guide path to both the front and back sides by the elastic dimple. Further, the front and back base materials of the bag used in the fluid packaging container of the present invention are a single layer sheet of nylon, polyethylene, polyethylene terephthalate or other synthetic resin film, or a laminate sheet of two or more of these, or a laminate of these A synthetic resin flexible sheet having a thickness of 100 to 250 microns comprising a laminated sheet in which an aluminum foil layer, an aluminum vapor deposited film layer, or a silica vapor deposited film layer is interposed between the sheets is preferable.

本発明は、袋体の形状、材質と流体自重の相互作用で注出の注出案内路に拡張流路が復元可能に形成されるので、シート素材に特別な補強層や加工の必要がなく、加工コスト高を抑えることができる。また、拡張流路の膨出弾性えくぼ及びこのえくぼによる膨出稜線は注出案内路の所定位置に所定の形で形成されるので、常に安定した注ぎ出しが保証される。 In the present invention, since the expansion channel can be restored in the extraction guide path by the interaction between the shape and material of the bag body and the weight of the fluid, there is no need for a special reinforcing layer or processing on the sheet material. High processing costs can be suppressed. Further, since the bulging elastic dimples of the expansion channel and the bulging ridge line due to the dimples are formed in a predetermined shape at a predetermined position of the pouring guide path, stable pouring is always guaranteed.

さらに、えくぼ、膨出稜線は弾力的に復元される構成になっているので、注出を繰り返しても疲労損傷のおそれがなく、また、注出口を切り取った袋体が倒れても復元力により開口面積が狭くなっているので内部流体が急激に流出するおそれが抑制される。 In addition, the dimples and the bulging ridgeline are elastically restored, so there is no risk of fatigue damage even after repeated pouring, and even if the bag body from which the spout is cut out collapses, Since the opening area is narrow, the risk of the internal fluid flowing out rapidly is suppressed.

本発明の一実施例による流体包装容器の袋体平面図The top view of the bag body of the fluid packaging container by one Example of this invention 流体内容物を充填した図１実施例の流体包装容器の自立状態側面図Side view of a self-standing state of the fluid packaging container of FIG. 1 embodiment filled with fluid contents 本発明による流体包装容器の注出案内路を下に向けたときの変形説明図Deformation explanatory drawing when the dispensing guide path of the fluid packaging container according to the present invention is directed downward 図３のＡ−Ａ線断面図AA line sectional view of FIG. 本発明による流体包装容器の注出案内路を下に向けたときの他の変形説明図Another modified explanatory view when the dispensing guide path of the fluid packaging container according to the present invention is directed downward 図５のＡ−Ａ線断面図AA line sectional view of FIG.

以下に、本発明の実施例を添付の図面に基づいて説明する。
図１は本発明の一実施例による詰め替え用の流体包装容器を示すもので、流体内容物を収納する前の平坦な袋体を表している。
この袋体１は、所定の厚みをもった表側、裏側の可撓性合成樹脂シート１ａ、１ｂを重ね合わせ、流体導入部２´以外の周縁辺（縁廻り）を熱圧着などで密閉して内部に流体収容部３を設けた構成になり、内部の流体収容部３に所望の流体を所定量充填した後、前記流体導入部２´を密閉して全周を密閉縁辺２に形成するものである。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a fluid packaging container for refilling according to an embodiment of the present invention, and shows a flat bag body before storing fluid contents.
The bag body 1 is formed by stacking front and back flexible synthetic resin sheets 1a and 1b having a predetermined thickness, and sealing a peripheral edge (around the edge) other than the fluid introduction part 2 'by thermocompression bonding or the like. A structure in which a fluid storage portion 3 is provided inside, and after a predetermined amount of fluid is filled in the fluid storage portion 3 in the interior, the fluid introduction portion 2 ′ is sealed to form the entire periphery on the sealed edge 2. It is.

ちなみに、図２に示すように、この実施例の袋体１は、下部に所定面積の内底面４を有し、袋体１を立てたときに内容物５が下部に滞留する自立型の袋体を例示している。ただし、本発明はこれに限定されるものではなく、非自立型の袋体容器にも適用することができる。 Incidentally, as shown in FIG. 2, the bag body 1 of this embodiment has an inner bottom surface 4 having a predetermined area in the lower part, and the contents 5 are retained in the lower part when the bag body 1 is erected. The body is illustrated. However, the present invention is not limited to this, and can be applied to a non-self-supporting bag container.

上記袋体１の内部には流体収容部３から方形角部６へ向けられた注出案内路７が設けられている。
この注出案内路７は袋体１の一方の側部密閉縁辺２ａと上部密閉縁辺２ｂに沿って前記方形角部６へ向けて緩やかに傾斜させた先細の流体注出路を構成している。詳細には、図１、図２及び図３に示すように、前記一方の側部密閉縁辺２ａと上部密閉縁辺２ｂは注出案内路７の先端の方形角部に向けて緩やかに傾斜させた凹状湾曲縁辺に形成されており、注出案内路７の先端付近には切断によって開口させる切取ガイド８が付されている。 A pouring guide path 7 directed from the fluid storage portion 3 to the square corner portion 6 is provided inside the bag body 1.
This extraction guide path 7 constitutes a tapered fluid extraction path that is gently inclined toward the rectangular corner 6 along one side sealing edge 2a and the upper sealing edge 2b of the bag body 1 . Specifically, as shown in FIGS. 1, 2, and 3, the one side sealing edge 2 a and the upper sealing edge 2 b are gently inclined toward the square corner at the tip of the extraction guide path 7. A cutting guide 8 is formed in the vicinity of the distal end of the extraction guide path 7 so as to be opened by cutting.

また、袋体１は注出案内路７を構成する前記上部密閉縁辺２ｂの注出案内路基部付近に、袋体１の内側へ絞り込んだ段差湾曲部９が形成されており、さらに、袋体１の基材である前記表側及び裏側合成樹脂シート１ａ、１ｂは、図３及び図５に示すように、袋体１の注出案内路７を下向きにしたときに、下方へ流下する流体自重により、袋体１の前記段差湾曲部９の密閉縁辺から袋体内側へ向けて所定長さの復元可能な弾力性のあるえくぼ（窪み）１０が形成される所定厚みの可撓性を有し、このえくぼ１０が形成される際の弾性変形で、前記注出案内路７の表・裏合成樹脂シート１ａ、１ｂが各々外側へ膨出し、注出案内路７が復元可能に拡張されるように構成されている。 Further, the bag body 1 is formed with a stepped curved portion 9 squeezed to the inside of the bag body 1 in the vicinity of the base portion of the upper sealing edge 2b constituting the pouring guide path 7, and further, the bag body. As shown in FIGS. 3 and 5, the front and back side synthetic resin sheets 1 a and 1 b, which are base materials of 1, flow downward when the pouring guide path 7 of the bag body 1 is directed downward. Thus, a flexible dimple 10 having a predetermined length is formed from the sealed edge of the stepped curved portion 9 of the bag body 1 toward the inner side of the bag body. The elastic deformation at the time of formation of the dimple 10 causes the front and back synthetic resin sheets 1a and 1b of the extraction guide path 7 to bulge outward, so that the extraction guide path 7 is expanded so that it can be restored. It is configured.

すなわち、本発明の流体収容容器の袋体１は、図３及び図５のように注出案内路７を下に向けると流体内容物５が袋体１の注出案内路７に向けて流れる過程で流体内容物の自重と袋体シートの可撓性により注出案内路７基部の段差湾曲部９から袋体内側へ向けてえくぼ１０が弾力性をもって形成され、このえくぼ１０の先端突部から丸みをおびた膨出稜線１１が形成され、これにより図４及び図６に示すように、注出案内路７が拡張されるものである。 That is, in the bag body 1 of the fluid container of the present invention, the fluid content 5 flows toward the extraction guide path 7 of the bag body 1 when the extraction guide path 7 is directed downward as shown in FIGS. 3 and 5. In the process, the dimple 10 is elastically formed from the step curved portion 9 of the base of the pouring guide path 7 toward the inside of the bag body due to the weight of the fluid contents and the flexibility of the bag sheet, and the tip protrusion of the dimple 10 From this, a rounded bulging ridge line 11 is formed, and as shown in FIGS. 4 and 6, the extraction guide path 7 is expanded.

このように、この膨出稜線１１は弾力性えくぼ１０によって形成され、該えくぼ１０の張出傾斜面１２によって支持されるので、流体が流下してくるたびに同じ位置に発生し、また、袋体１の転地を元に戻すと可撓性合成樹脂シート１ａ、１ｂの弾性により下の平坦なシート面に復元する。 In this way, the bulging ridge line 11 is formed by the elastic dimple 10 and is supported by the overhanging inclined surface 12 of the dimple 10, so that it is generated at the same position every time the fluid flows down. When the body 1 is returned to its original position, it is restored to the lower flat sheet surface by the elasticity of the flexible synthetic resin sheets 1a and 1b.

上記のように、本発明による注出案内路７の拡張機能は、袋体１の形状、すなわち、上部密閉縁辺２ｂに形成した段差湾曲部９と袋体１の注出案内路７を下向きにしたときの流体自重による可撓性シート１ａ、１ｂの弾力的な変形、すなわち、えくぼ１０の形成によってもたらされるものであるところから、袋体１の上記形状とともに、袋体１を構成する表・裏可撓性シート１ａ、１ｂの材質、物性が重要である。 As described above, the expansion function of the extraction guide path 7 according to the present invention is such that the shape of the bag body 1, that is, the step curved portion 9 formed on the upper sealing edge 2b and the extraction guide path 7 of the bag body 1 are directed downward. When the flexible sheet 1a, 1b is elastically deformed by its own weight, that is, it is brought about by the formation of the dimple 10, the table constituting the bag body 1 together with the shape of the bag body 1 The material and physical properties of the back flexible sheets 1a and 1b are important.

上記注出案内路７の基部付近に形成した段差湾曲部９の内側に復元可能な弾力性えくぼ１０を形成させ、これにより、注出案内路７に膨出稜線１１を形成して流路拡張させる可撓性合成樹脂シート１ａ、１ｂについて、本願発明者は種々研究の結果、ナイロン、ポリエチレン、ポリエチレンテレフタレート、その他の、好ましくは２軸延伸合成樹脂フイルムの単層シート又はこれら２種以上の複層シート、もしくは、これら合成樹脂複層シート間にアルミ箔層、アルミ蒸着フイルム層又はシリカ蒸着フイルム層などを介在させた複合フイルムからなる厚さ１００〜２５０ミクロン、好ましくは１３０〜１５０ミクロンの可撓性合成樹脂シートが好適であることを見出した。
使用する可撓性合成樹脂シート１ａ、１ｂの厚さが１００ミクロン未満では、復元しない皺や折れ目がつき易く、段差湾曲部の形成がかえって不利に働く。また、厚さが２５０ミクロンを超えると材料が無駄になるだけでなく、剛性が強すぎて上記の効果を奏する適度の弾性を発揮する可撓性シートが得にくくなる。 A resilient dimple 10 is formed inside the step curved portion 9 formed in the vicinity of the base portion of the pouring guide path 7, thereby forming a bulging ridge line 11 in the pouring guide path 7 and expanding the flow path. As a result of various studies, the inventor of the present invention has made various studies on the flexible synthetic resin sheets 1a and 1b to be made. Thickness of 100 to 250 microns, preferably 130 to 150 microns composed of a layered sheet or a composite film in which an aluminum foil layer, an aluminum vapor deposited film layer, or a silica vapor deposited film layer is interposed between these synthetic resin multilayer sheets. It has been found that a flexible synthetic resin sheet is suitable.
If the thickness of the flexible synthetic resin sheets 1a and 1b to be used is less than 100 microns, the wrinkles and creases that are not restored are easily formed, and the formation of the stepped curved portion is disadvantageously performed. In addition, when the thickness exceeds 250 microns, not only is the material wasted, but it is difficult to obtain a flexible sheet exhibiting moderate elasticity that exhibits the above-described effects due to its rigidity being too strong.

本発明の流体包装容器は、液体洗剤、飲料その他の流状又は半流状物の包装分野において詰め替え用の使い捨て包装容器として広く利用することができる。 The fluid packaging container of the present invention can be widely used as a disposable packaging container for refilling in the field of packaging liquid detergents, beverages and other fluids or semi-fluids.

１…袋体
１ａ、１ｂ…可撓性合成樹脂シート
２…密閉縁辺
２´…流体導入部
２ａ…側部密閉縁辺
２ｂ…上部密閉縁辺
３…流体収容部
４…内底面
５…流体内容物
６…方形角部
７…注出案内路
８…切取線
９…段差湾曲部
１０…えくぼ
１１…膨出稜線
１２…膨出傾斜面 DESCRIPTION OF SYMBOLS 1 ... Bag body 1a, 1b ... Flexible synthetic resin sheet 2 ... Sealing edge 2 '... Fluid introduction part 2a ... Side part sealing edge 2b ... Upper sealing edge 3 ... Fluid accommodating part 4 ... Inner bottom face 5 ... Fluid content 6 ... Square corner 7 ... Pouring guideway 8 ... Cut-off line 9 ... Step curve part 10 ... Embo 11 ... Swelling ridgeline 12 ... Swelling slope

Claims

ナイロン、ポリエチレン、ポリエチレンテレフタレートその他の合成樹脂フイルムの単層又はこれらの２種以上の積層シート、もしくはこれら積層シート間にアルミ箔層、アルミ蒸着フイルム層又はシリカ蒸着フイルム層を介在させた積層シートからなる厚さ１００〜２５０ミクロンの合成樹脂可撓シートを重ね合わせた表・裏の合成樹脂可撓シート間に流体収容部を設けて周縁辺を密閉する略方形の袋体（１）を有し、この袋体（１）の一方の側部密閉縁辺（２ａ）を内部流体収容部底部から方形角部（６）まで延びる緩やかな凹状円弧湾曲縁辺に形成し、このように形成した前記一方の側部密閉縁辺（２ａ）と、前記方形角部（６）に向けて緩やかに傾斜させた上部密閉縁辺（２ｂ）とからなる先細の注出案内路（７）を形成するとともに、前記上部密閉縁辺（２ｂ）の注出案内路（７）基部付近に、袋体（１）内側へ絞り込んだ段差湾曲部（９）を形成し、袋体（１）の注出案内路（７）を下向きにしたときに、袋体（１）の前記縁辺形状と、袋体シート基材の可撓性と、下方へ流下する流体自重により袋体（１）の前記上部密閉縁辺（２ｂ）の段差湾曲部（９）から袋体シート基材の内側へ向かう復元可能な弾性えくぼ（１０）が形成され、この弾性えくぼ（１０）による弾力変形で前記注出案内路（７）が表・裏両側へ復元可能に拡張される構成にしたことを特徴とする流体包装容器 From a single layer of nylon, polyethylene, polyethylene terephthalate or other synthetic resin film or a laminate sheet of two or more of these, or a laminate sheet in which an aluminum foil layer, an aluminum vapor deposited film layer or a silica vapor deposited film layer is interposed between the laminated sheets A substantially rectangular bag body (1) that seals the peripheral edge by providing a fluid accommodating portion between the front and back synthetic resin flexible sheets on which synthetic resin flexible sheets having a thickness of 100 to 250 microns are stacked. The one side sealing edge (2a) of the bag (1) is formed into a gently concave arc-curved edge extending from the bottom of the internal fluid storage part to the square corner (6), and the one of the ones thus formed is formed. and side shielding edge (2a), to form the tapered spout guideway consists and was gently inclined upper sealing edge (2b) towards the square corner (6) (7) together The pouring guideway of the upper sealing edge (2b) (7) near the base, to form the bag (1) stepped bending portion narrowed inward (9), pouring guideway bag (1) ( When the 7) is faced down, the upper side edge (2b) of the bag body (1) is formed by the edge shape of the bag body (1), the flexibility of the bag sheet base material, and the weight of the fluid flowing downward. recoverable elastic dimple that stepped curved portion (9) toward the inside of the bag sheet substrate) (10) is formed, said spout guideway (7) Table resiliently deformed by the elastic dimple (10)・ A fluid packaging container that is configured to be reversibly expanded on both sides.