Pouch container

Abstract

To provide a medical pouch container with a novel structure that is suitably used, for example, as a container for enteral nutrient in a medical site.SOLUTION: A pouch container comprises: a pair of main body sheets 1A, 1B which are put one over the other; a pair of side seal parts 42; a housing part 51; and an opening part 52. The pouch container also comprises: a resin-made reinforcement member 3A which is provided along an inner side of at least the one main body sheet 1A between the pair of main body sheets 1A, 1B, and has a stiffness higher than the main body sheet 1A; and an interior sheet 2A which sandwiches the reinforcement member 3A together with the one main body sheet 1A, and is fixed to the pair of main body sheets 1A, 1B at the pair of side seal parts 42. The reinforcement member 3A is fixed to the one main body sheet 1A at at least one of the pair of side seal parts 42.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pouch container used in medical settings to store, for example, enteral nutrients and administer them to patients. [Background technology]

[0002] Conventionally, pouch containers have been widely used as containers for enteral nutritional agents, intravenous nutritional agents, infusions, etc. Medical pouch containers used when administering nutrients to patients have openings for injecting the nutrients or their dilutions. Due to the special nature of their applications, pouch containers in the medical field have requirements or challenges in each field, such as quick and reliable operability, and prevention of bacterial adhesion.

[0003] For example, when injecting nutrients or the like through the opening, it is necessary to push the opening open. Such an operation is unstable, and there is a demand for improving the workability. In the pouch container described in Patent Document 1, a sealed storage section is formed by attaching an elongated sheet to the outer surface of the main body sheet. A linear member made of aluminum is stored in this sealed storage section. The linear member is used to keep the opening open. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-319283 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the pouch container described in Patent Document 1, for example, a long and narrow sheet is attached to the outer surface of the sheet, so there are concerns that the user may feel uncomfortable when touching it or that the sheet may get caught. Also, from other perspectives, there is still room for improvement in conventional medical pouch containers, particularly pouch containers for enteral nutrients, with regard to various issues required for specific uses.

[0006] The present invention has been devised under the above circumstances, and an object of the present invention is to provide a pouch container having a new structure which has been improved so as to satisfy the required characteristics of a pouch container. [Means for solving the problem]

[0007] Hereinafter, preferred embodiments for understanding the present invention will be described, but each embodiment described below is described as an example and can be appropriately combined with each other. That is, each embodiment described below can be combined with two or more embodiments, regardless of whether it is described in a form that refers to other embodiments, or a part of the configuration described in a specific embodiment can be extracted and combined with another embodiment. In short, multiple components described in each embodiment can be recognized and adopted independently as much as possible, and can also be adopted in combination with any component described in another embodiment as appropriate. As a result, the present invention is not limited to the embodiments described below, and various other embodiments can be realized.

[0008] The first aspect is A pouch container for enteral nutrients, comprising: a storage section that opens upward between overlapping surfaces of a pair of main sheets; and an opening portion that is shorter in width at the lower portion than at the upper portion, The pair of main body sheets are provided with zippers for sealing the storage portion, A reinforcing member is provided on at least one of the main sheets so as to extend in the sheet width direction and is located closer to the opening than the chuck and has a deformation rigidity greater than that of the main sheet so as to hold the main sheet in a curved shape. This is a pouch container for enteral nutrition.

[0009] In the pouch container for enteral nutrients according to this embodiment, a reinforcing member is disposed above the zipper. Therefore, for example, the reinforcing member can be bent in the opening direction by the operation force of opening the zipper, and the opening of the storage section can be opened efficiently. In addition, for example, when the lower part has an opening part with a shorter width length than the upper part, the force is not easily transmitted to the wider width direction side at the upper part, and the pouch tends to be difficult to open. However, by bending and deforming the reinforcing member located at the opening part before applying the opening operation force, the opening operation force can be applied from the state in which the sheet is deformed in the opening direction, and the opening stability during the opening operation can be improved.

[0010] In addition, by utilizing the stable opening operation using this chuck member, a bending operating force can also be applied to the reinforcing member arranged above the chuck member, so that the pressing force from both sides in the width direction by the fingers is indirectly transmitted to the opening portion where the reinforcing member is arranged, making it possible to stably achieve the operation of opening by pressing operation.

[0011] The second aspect is A pouch container for enteral nutrients, the pouch container having an upwardly opening storage section formed between the overlapping surfaces of a pair of main sheets, A reinforcing member having a deformation rigidity greater than that of the main body sheet is provided at an upward opening of the storage section so as to extend in the sheet width direction on the inner side of at least one of the main body sheets. This is a pouch container for enteral nutrition.

[0012] In the pouch container for enteral nutrients according to this embodiment, a reinforcing member is disposed on the inside of the main sheet (the side on which the storage portion is formed). Therefore, the force of the reinforcing member to hold the pair of main sheets apart from each other to open the opening can be applied from the inside of the main sheet. As a result, compared to a case in which the reinforcing member is disposed on the outside of the main sheet, it is possible to prevent the force of the reinforcing member to hold the opening shape on the main sheet from being affected by the state of adhesion between the reinforcing member and the main sheet.

[0013] In addition, unlike the case where a reinforcing member is provided on the outside of the main body sheet, it is possible to avoid unevenness on the outer surface and make the outer surface smooth, which can prevent the outer surface of the pouch container from being unintentionally caught or accumulating dirt, and can prevent contaminants from flowing into the container. Furthermore, when the outer surface of the main body sheet is a printed layer, the outer surface has flat bones, which makes it look good and makes it a suitable container for hospitals and the like where cleanliness is important.

[0014] A third aspect is a pouch container for an enteral nutrient according to the second aspect, an interior sheet covering the reinforcing member provided on the inner side of the main body sheet is superimposed on the inner surface of the main body sheet; The interior sheet is fixed to the main body sheet below and above the reinforcing member. This is a pouch container for enteral nutrition.

[0015] In the pouch container for enteral nutrients according to this embodiment, the reinforcing member provided on the inside of the main sheet is covered with the interior sheet. This makes it possible to prevent the liquid injected through the opening from coming into contact with the reinforcing member, and also makes it possible to expand the range of materials that can be selected for the reinforcing member. In addition, by making the inner surface of the opening smooth, it is possible to prevent the injected liquid from being unnecessarily trapped or splashing due to unevenness caused by the reinforcing member.

[0016] The fourth aspect is A pouch container for enteral nutrients, the pouch container having an upwardly opening storage section formed between the overlapping surfaces of a pair of main sheets, A reinforcing member having a deformation rigidity greater than that of the main body sheet and capable of holding the main body sheet in a curved shape is provided at an upward opening of the storage section so as to extend in the sheet width direction of at least one of the main body sheets, Both ends of the reinforcing member are fixed to side seal portions formed on both widthwise edges of the pair of main sheets. This is a pouch container for enteral nutrition.

[0017] In the pouch container for enteral nutrients according to this embodiment, the end of the reinforcing member in the length direction (main body sheet width direction) is fixed to the side seal part of the main body sheet. Therefore, it is possible to avoid problems that may occur when the end of the reinforcing member is located in the center part of the main body sheet, such as a large change in bending stiffness of the opening part at the end of the reinforcing member, resulting in bending at that part and an irregular opening shape, and to realize a smooth opening shape in the circumferential direction at the opening part. In addition, it is possible to avoid problems that may occur when the end of the reinforcing member is located in the opening part of the main body sheet, such as a large change in sheet strength at that part, which may cause damage to the sheet due to stress concentration associated with deformation, and to realize a thin main body sheet and a low strength. In addition, since the side seal part around the reinforcing member is less likely to bend and deform, it is possible to prevent a situation in which the side seal part bends and the side of the opening part is similarly bent, resulting in an unstable opening shape.

[0018] The fifth aspect is A pouch container for enteral nutrients, the pouch container having an upwardly opening storage section formed between the overlapping surfaces of a pair of main sheets, At the upper opening, the lower portion is formed smaller in the container inner dimension in the width direction than the upper portion, a reinforcing member having a deformation rigidity greater than that of the main body sheet and capable of holding the main body sheet in a curved shape is provided in the opening portion so as to extend in the sheet width direction in at least one of the main body sheets; A pressing operation portion for exerting an operating force to open the opening portion is located above or below the reinforcing member. This is a pouch container for enteral nutrition.

[0019] In the pouch container for enteral nutritional supplement according to this embodiment, the reinforcing member is located at the opening where the inside dimension of the container in the width direction is smaller at the bottom than at the top. Therefore, the opening operation force applied to the pressing operation part can be transmitted over a wide area in the width direction via the reinforcing member. It is preferable that the length dimension of the reinforcing member is larger than the inside dimension of the container in the width direction of the main body sheet at the pressing operation part, and that the pressing operation part is located below the reinforcing member. It is also preferable that the reinforcing member is located in the middle part (not necessarily in the center in the vertical direction) of the opening part excluding the top and bottom ends in the vertical direction, and in this case, the pressing operation part may be located at the bottom end or below the opening part.

[0020] The sixth aspect is A pouch container for enteral nutrients, the pouch container having an upwardly opening storage section formed between the overlapping surfaces of a pair of main sheets, A reinforcing member having a deformation rigidity greater than that of the main body sheet is provided at an upward opening of the storage section so as to extend in a sheet width direction on an inner side of each of the main body sheets, An interior sheet for covering the reinforcing member is superimposed on the inner surface of each of the main body sheets, and each of the interior sheets is welded to the pair of main body sheets at side seal portions provided on both side edges of the pair of main body sheets in the sheet width direction, The sealant layer on the inner surface of each of the interior sheets has a higher melting point than the sealant layer on the outer surface. This is a pouch container for enteral nutrition.

[0021] In the pouch container for enteral nutrients according to this embodiment, the difference in melting temperature of the sealant layers on the front and back of the interior sheet makes it possible to simplify the welding process in the manufacturing stage. Specifically, for example, the reinforcing member and the interior sheet are arranged so as to be overlapped in sequence on each inner side (inner surface) of the opening portion of a pair of main body sheets, and the reinforcing member and the interior sheet are welded to the inner surface of each main body sheet over almost the entire surface thereof in a first welding step at a relatively low temperature, and then only the side seal portions at both ends in the width direction of the main body sheet are welded in a second welding step at a higher temperature. This makes it possible to avoid welding of the overlapped interior sheets to each other in the first welding step at a low temperature and ensure an open state, while in the second welding step at a higher temperature, it is possible to form an opening portion by welding the side seal portions and reduce or eliminate unevenness caused by crushing the reinforcing member in the side seal portions. In particular, it eliminates the need to set a non-welded sheet between the overlapping surfaces of the interior sheets at the opening and then weld them together in order to avoid welding the interior sheets together, thereby improving workability and manufacturing efficiency while also preventing the occurrence of defective products in which the opening is unnecessarily partially welded.

[0022] The seventh aspect is A pouch container product for enteral nutrients, in which a medical pouch container having a storage section that opens upward between overlapping surfaces of a pair of main sheets is folded up and down and stored in a bag-shaped sealed case together with a discharge section connected to the storage section, A reinforcing member having a deformation rigidity greater than that of the main body sheets is provided at an upper opening portion of the storage portion of the pouch container so as to extend in the sheet width direction on the inside of at least one of the main body sheets, and the pouch container is stored in the sealed case in a state in which the pair of main body sheets are pre-shaped to open apart from each other at the opening portion where the reinforcing member is provided. This is a pouch container product for enteral nutrition.

[0023] In the pouch container product for enteral nutrients according to this embodiment, the medical pouch container housed in the bag-shaped sealed case has an opening part that is pre-shaped to be open in the state of being housed. Therefore, when the medical pouch container is provided to the medical site in the state of being housed in the sealed case and the sealed case is opened and taken out at the medical site, the opening part is already curved or the like in the opening direction to some extent at the time of taking it out. In this state, by applying an inward operating force to both pressing operation parts provided on both sides in the width direction of the main body sheet for applying an operating force to open the opening part, the reinforcing member can be easily and stably curved and deformed in the opening direction, and the opening part can be opened quickly. This makes it unnecessary to insert fingers into the opening part and pull the pair of main body sheets in the direction away from each other to open the opening part that is closed in the housed state after being taken out of the sealed case, and it is also possible to avoid the risk of bacteria from the fingers adhering to the inner surface of the opening part that comes into contact with the liquid when the liquid is injected by inserting the fingers into the opening part.

[0024] In particular, in the pouch container product for enteral nutrients according to this embodiment, even if a bag-shaped sealed case made of, for example, a soft sheet material is used, the pouch container is stored together with the tube, etc., and, coupled with the fact that the pouch container is stored in a folded state, there is a certain amount of space inside the sealed case. In other words, if one or more medical pouch containers are stored in a sealed case in a flattened, unfolded state, the space efficiency during storage and transportation is excellent, but the opening portion is likely to be crushed. In this embodiment, by using a certain amount of space inside (i.e., reversing what was previously considered a disadvantage during storage and transportation), it is possible to keep the opening portion of the stored medical pouch container in an open state to a certain extent, and by combining this with the provision of a reinforcing member at the opening portion, it is possible to provide the medical pouch container to the medical site while keeping the opening portion of the medical pouch container in an open state to a certain extent when the sealed container is opened at the medical site.

[0025] The eighth aspect is A pair of main sheets overlapped with each other; a pair of side seal portions formed by joining both side edges of the pair of main body sheets in the width direction; a storage portion for storing contents, surrounded by the pair of main body sheets and the pair of side seal portions; an opening connected to the storage portion and defined by upper edges of the pair of main body sheets, a reinforcing member made of resin and having a higher rigidity than the main body sheet, the reinforcing member being provided along an inner side of at least one of the pair of main body sheets; an interior sheet that sandwiches the reinforcing member together with the one of the main body sheets and is fixed to the pair of main body sheets at the pair of side seal portions, The reinforcing member is fixed to the one of the main body sheets at at least one of the pair of side seal portions. It is a pouch container.

[0026] A ninth aspect is the eighth aspect, The reinforcing member is a pouch container that is fixed to one of the main body sheets at both of the pair of side seal portions.

[0027] The tenth aspect is the eleventh aspect, The pouch container is formed such that both ends of the reinforcing member and both side ends of the one main body sheet and the interior sheet are aligned with each other.

[0028] An eleventh aspect is any one of the eighth to tenth aspects, The pouch container has inner end edges of the pair of side seal portions that overlap the interior sheet, the inner end edges being inclined so as to be positioned more inward in the width direction as they extend downward.

[0029] A twelfth aspect is any one of the eighth to eleventh aspects, The pouch container has an easily folding portion in which the bending rigidity of the reinforcing member is partially reduced.

[0030] In the pouch container according to this embodiment, the reinforcing member has a portion with reduced bending rigidity in the longitudinal direction thereof, and by providing the portion with reduced bending rigidity at a predetermined position in advance, it becomes possible to easily cause bending deformation of the reinforcing member and to stably deform the reinforcing member into a predetermined desired shape after deformation.

[0031] In addition, the portion of the reinforcing member with partially reduced bending rigidity can be suitably formed by, for example, reducing the cross-sectional area or section modulus by partially varying the thickness dimension or width dimension, etc. Alternatively, when the reinforcing member is fixed to the inner or outer surface of the main body sheet, it is also possible to make the unfixed portion a portion with low bending rigidity by making a structure in which the reinforcing member is partially unfixed to the main body sheet in the longitudinal direction and is not affected by the deformation restraining force of the main body sheet.

[0032] A thirteenth aspect is any one of the eighth to twelfth aspects, The pouch container has an intermediate outer seal portion where the one main body sheet and the reinforcing member are joined.

[0033] A fourteenth aspect is any one of the eighth to thirteenth aspects, a second reinforcing member made of resin and having higher rigidity than the main body sheet, the second reinforcing member being provided along an inner side of the other of the pair of main body sheets; The pouch container further includes an other interior sheet that sandwiches the other reinforcing member together with the other main body sheet and is fixed to the pair of main body sheets at the pair of side seal portions.

[0034] A fifteenth aspect is any one of the eighth to fourteenth aspects, The pouch container is such that the one reinforcing member and the other reinforcing member are arranged offset from each other in the vertical direction. Effect of the Invention

[0035] According to the present invention, as described above for each aspect, it is possible to provide a pouch container having a novel structure which achieves some improvements in terms of various issues required for conventional pouch containers, particularly pouch containers for enteral nutrients used in the medical field.

[0036] Other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0037] [Figure 1] FIG. 1 is a front view showing a medical pouch container according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] 1 is an enlarged cross-sectional view of a main portion of a medical pouch container according to a first embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] 1 is an enlarged front view of a main portion of a medical pouch container according to a first embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 1 is a perspective view showing a medical pouch container according to a first embodiment of the present invention. [Figure 9] FIG. 2 is an enlarged cross-sectional view of a main portion showing a first modified example of a medical pouch container according to the first embodiment of the present invention. [Figure 10] FIG. 4 is an enlarged cross-sectional view of a main portion showing a second modified example of the medical pouch container according to the first embodiment of the present invention. [Figure 11] FIG. 11 is an enlarged cross-sectional view of a main portion showing a third modified example of the medical pouch container according to the first embodiment of the present invention. [Figure 12] FIG. 11 is a front view of a main portion showing a fourth modified example of the medical pouch container according to the first embodiment of the present invention. [Figure 13] 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12. [Figure 14] FIG. 11 is a cross-sectional view showing a fifth modified example of the medical pouch container according to the first embodiment of the present invention. [Figure 15] FIG. 5 is a front view of a main portion showing a medical pouch container according to a second embodiment of the present invention. [Figure 16] FIG. 11 is a front view of a main portion showing a first modified example of a medical pouch container according to a second embodiment of the present invention. [Figure 17] FIG. 11 is a front view of a main portion showing a medical pouch container according to a third embodiment of the present invention. [Figure 18] FIG. 11 is a front view of a main portion showing a first modified example of a medical pouch container according to a third embodiment of the present invention. [Figure 19] FIG. 13 is a front view of a main portion showing a second modified example of the medical pouch container according to the third embodiment of the present invention. [Figure 20] FIG. 11 is a front view of a main portion showing a medical pouch container according to a fourth embodiment of the present invention. [Figure 21] FIG. 11 is an enlarged front view of a main portion showing a medical pouch container according to a fourth embodiment of the present invention. [Figure 22] 22 is a cross-sectional view taken along line XXII-XXII in FIG. 21. [Figure 23] FIG. 13 is an enlarged cross-sectional view of a main portion showing a first modified example of a medical pouch container according to a fourth embodiment of the present invention. [Figure 24] FIG. 13 is a front view of a main portion showing a second modified example of the medical pouch container according to the fourth embodiment of the present invention. [Diagram 25] FIG. 13 is a front view of a main portion showing a third modified example of the medical pouch container according to the fourth embodiment of the present invention. [Figure 26] FIG. 13 is a front view of a main portion showing a medical pouch container according to a fifth embodiment of the present invention. [Figure 27] FIG. 13 is an enlarged cross-sectional view of a main part of a medical pouch container according to a sixth embodiment of the present invention. [Figure 28] FIG. 13 is an enlarged cross-sectional view of a main portion showing a medical pouch container according to a seventh embodiment of the present invention. [Figure 29] FIG. 13 is a perspective explanatory view showing an example of a medical pouch container product according to an eighth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0039] In the following, a liquid nutrient (not shown) is exemplified as a filler to be injected into a medical pouch container (hereinafter simply referred to as a pouch container). However, the filler is not limited to this, and may be, for example, water or a medicinal liquid for diluting the nutrient, or a jelly-like or paste-like substance. The pouch container of the present invention is particularly suitable for use as a medical bag, such as an empty bag for replenishing nutrient, by containing liquids such as nutrient liquid or infusion fluid therein, but the configuration of the present invention is not limited to medical use and may be applied to various types of containers.

[0040] In the following, a structure in which an edge of a sheet is fixed to another sheet will be described. In this specification, "an edge of a sheet is fixed to another sheet" is a concept that includes a structure in which two separate sheet materials are fixed to each other, and a structure in which one sheet material is folded back to fix two sheets via the folded back portion. In addition, "fixing" sheets together is a concept that includes joining by heat sealing, adhesives, etc.

[0041] In the following, a flat pouch in which the portion below the opening is composed only of the first main body sheet 1A and the second main body sheet 1B described below will be exemplified, but the configuration of the present invention may be applied to other pouch forms such as a standing pouch having a bottom (bottom gusset) or a pouch having a side gusset portion. In these pouch containers having gussets, the side seal portion 42 described below formed by joining the side ends of the first main body sheet 1A and the second main body sheet 1B also includes, for example, the side seal portion 42 formed by joining the side ends of the first main body sheet 1A and the gusset portion (part of the second main body sheet 1B) together. In other words, when such a sheet forming a gusset portion is used separately from the first main body sheet 1A and the second main body sheet 1B, the second main body sheet 1B may be directly overlapped and fixed to the first main body sheet 1A, or it may be indirectly overlapped and fixed via the sheet forming the gusset portion (the joining of both end edges and bottom edges of the pair of main body sheets 1A, 1B includes a mode in which they are indirectly joined via a gusset sheet).

[0042] The up-down direction of the pouch container and its components according to the present invention refers to the linear direction passing through the center of the cylinder (or ellipse, etc.) when the opening of the pouch container is expanded into a cylindrical shape (which may have an elliptical or other cross-sectional shape), and the width direction refers to the direction perpendicular to the up-down direction and in which side seal portions 42, which will be described later, are spaced apart. The outside of a certain component refers to the side farther from the contents based on the pouch container, and the inside of a certain component refers to the opposite side.

[0043] First Embodiment The pouch container A1 according to the first embodiment will be described with reference to Figs. 1 to 8. Fig. 1 is a front view of the pouch container A1. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is an enlarged cross-sectional view of the main part of the pouch container A1. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 1. Fig. 5 is an enlarged front view of the main part of the pouch container A1. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 5. Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 5. Fig. 8 is a perspective view of the pouch container A1 with the opening 52 expanded. In Figs. 2 to 4, 6 and 7, the thickness of each sheet is exaggerated for ease of understanding the structure of the pouch container A1.

[0044] The pouch container A1 includes a first main body sheet 1A, a second main body sheet 1B, a first interior sheet 2A, a second interior sheet 2B, a first reinforcing member 3A, and a second reinforcing member 3B, and includes a storage section 51, an opening 52, a bottom seal section 41, a pair of side seal sections 42, a pouring seal section 43, a first upper seal section 44A, a second upper seal section 44B, a first lower seal section 45A, a second lower seal section 45B, a first intermediate outer seal section 46A, and a second intermediate outer seal section 46B. The front view shape of the illustrated pouch container A1 is generally substantially rectangular, but the shape of the pouch container A1 is not limited to this. For example, the front view shape of the pouch container A1 may be any of various shapes such as a circle, an ellipse, an oval (egg), a triangle (preferably an inverted triangle), and a polygon. In the illustrated example, the outer edges of the first main body sheet 1A and the second main body sheet 1B and the upper edges and both side edges of the first interior sheet 2A and the second interior sheet 2B are configured to coincide with each other, but it is also possible for some of these to be misaligned with respect to each other.

[0045] The first body sheet 1A and the second body sheet 1B are overlapped with each other in the front-back direction, and constitute most of the outer surface of the pouch container A1. As shown in Figs. 1 and 2, the bottom seal portion 41 is formed by joining the lower ends of the first body sheet 1A and the second body sheet 1B, including the lower edges and the portions near the lower edges. As shown in Figs. 1, 4, 6 and 7, the pair of side seal portions 42 are formed by joining the pair of side ends of the first body sheet 1A and the second body sheet 1B, including the pair of side edges and the portions near the pair of side edges. In the upper part of the side seal portion 42, the first interior sheet 2A, the second interior sheet 2B, the first reinforcing member 3A and the second reinforcing member 3B are sandwiched between the first body sheet 1A and the second body sheet 1B and joined. The joining method for the bottom seal portion 41 and the pair of side seal portions 42 is preferably, for example, heat sealing or high-frequency welding.

[0046] As shown in FIG. 1, in the illustrated example, each of the pair of side seal portions 42 has an inner edge 421 and a curved portion 423. The inner edge 421 is an edge located inside the side seal portion 42 that extends with a substantially constant width dimension. In the illustrated example, the portion of the inner edge 421 that overlaps with the first interior sheet 2A and the second interior sheet 2B is inclined so as to be located inward in the width direction as it moves downward from the first upper seal portion 44A (second upper seal portion 44B) to the first lower seal portion 45A (second lower seal portion 45B). The curved portion 423 is a portion of the side seal portion 42 that is curved so as to be recessed inward in the width direction. In the illustrated example, the curved portion 423 is provided below the first reinforcing member 3A (second reinforcing member 3B) at a position overlapping with the lower edges of the first interior sheet 2A and the second interior sheet 2B, the first lower seal portion 45A and the second lower seal portion 45B, and further the zipper 53.

[0047] The storage section 51 is a space surrounded by the first main body sheet 1A and the second main body sheet 1B, and its shape in front view is defined by the bottom seal portion 41 and the inner ends of the pair of side seal portions 42. The storage section 51 is a portion for filling with contents such as nutrients. An opening 52 is defined by the upper edges of the first main body sheet 1A and the second main body sheet 1B. The opening 52 opens upward and is connected to the storage section 51.

[0048] The pouch container A1 is provided with a zipper 53. The zipper 53 is for sealing the storage section 51. When the zipper 53 is closed, the storage section 51 is sealed by the bottom seal section 41, the pair of side seal sections 42, and the zipper 53. The specific configuration of the zipper 53 is not particularly limited, and in the illustrated example, as shown in Figs. 2 and 3, a sheet with a convex rib section and a sheet with a concave rib section that fits into the convex rib section are arranged opposite each other. In the figures, the sheet with the convex rib section is joined to the inner surface of the first main body sheet 1A, and the sheet with the concave rib section is joined to the inner surface of the second main body sheet 1B.

[0049] As shown in Fig. 1, the pouch container A1 is provided with a pouring part 54. The pouring part 54 is for pouring out the nutritional supplement filled in the storage part 51. The pouring part 54 is, for example, a plastic tube with a stopper, and is attached to the corners between the lower and side edges of the first main body sheet 1A and the second main body sheet 1B. Specifically, the pouring seal part 43 is formed by joining each member with the pouring part 54 sandwiched between the first main body sheet 1A and the second main body sheet 1B, thereby attaching the pouring part 54.

[0050] For example, a long tube (not shown) is attached to the discharge part 54. This tube is connected to the outer opening opposite to the inner opening of the discharge part 54 that is connected to the storage part 51. The tube is a flexible tube, and a chamber (drip tube), clamp (flow regulator), connector, etc. (none of which are shown) are provided as necessary, and the tube is inserted from the nasal cavity, etc., and reaches the stomach, duodenum, etc. of the patient's body (not shown). The contents, such as nutrients, contained in the storage part 51 are administered into the patient's body through the tube. Although not shown, a hanging hole for hanging the pouch container A1 during administration may be provided on the diagonal side of the discharge part 54.

[0051] As shown in Figs. 1 to 4, the first interior sheet 2A is disposed so as to overlap the upper part of the first main body sheet 1A, and is provided inside the first main body sheet 1A. In the illustrated example, the first interior sheet 2A is disposed above the zipper 53. The upper edge of the first interior sheet 2A is fixed to the first main body sheet 1A. The structure in which the upper edge of the first interior sheet 2A is fixed to the first main body sheet 1A is not particularly limited, and in the illustrated example, a first upper seal part 44A is provided in which the parts including the upper edge of the first interior sheet 2A and the upper edge of the first main body sheet 1A are joined by heat sealing. The first upper seal part 44A is an example of the first upper fixed part of the present invention. In the illustrated example, the first upper seal part 44A is formed over the entire width of the first main body sheet 1A and the first interior sheet 2A.

[0052] Also, the portion near the lower edge of the first interior sheet 2A is fixed to the first main body sheet 1A. The structure by which the portion near the lower edge of the first interior sheet 2A is fixed to the first main body sheet 1A is not particularly limited, and in the illustrated example, a first lower seal portion 45A is provided in which the portion near the lower edge of the first interior sheet 2A and the first main body sheet 1A are joined by heat sealing. The lower edge of the first interior sheet 2A may be fixed to the first main body sheet 1A by the first lower seal portion 45A. The first lower seal portion 45A is an example of the first lower fixed portion of the present invention. The first lower seal portion 45A is formed over the entire width of the first main body sheet 1A and the first interior sheet 2A.

[0053] As shown in Figs. 1 to 4, the second interior sheet 2B is disposed so as to overlap the upper part of the second main body sheet 1B, and is provided inside the second main body sheet 1B. In the illustrated example, the second interior sheet 2B is disposed above the zipper 53. The upper end edge of the second interior sheet 2B is fixed to the second main body sheet 1B. The structure for fixing the upper end edge of the second interior sheet 2B to the second main body sheet 1B is not particularly limited, and in the illustrated example, a second upper seal part 44B is provided in which the parts including the upper end edge of the second interior sheet 2B and the upper end edge of the second main body sheet 1B are joined by heat sealing. The second upper seal part 44B is an example of the second upper fixed part of the present invention. In the illustrated example, the second upper seal part 44B is formed over the entire width of the second main body sheet 1B and the second interior sheet 2B.

[0054] Also, the portion near the lower edge of the second interior sheet 2B is fixed to the second main body sheet 1B. The structure in which the portion near the lower edge of the second interior sheet 2B is fixed to the second main body sheet 1B is not particularly limited, and in the illustrated example, a second lower seal portion 45B is provided in which the portion near the lower edge of the second interior sheet 2B and the second main body sheet 1B are joined by heat sealing. The lower edge of the second interior sheet 2B may be fixed to the second main body sheet 1B by the second lower seal portion 45B. The second lower seal portion 45B is an example of the second lower fixed portion of the present invention. The second lower seal portion 45B is formed over the entire width of the second main body sheet 1B and the second interior sheet 2B.

[0055] As shown in Figs. 1 to 7, the first reinforcing member 3A is provided between the first main body sheet 1A and the first interior sheet 2A. The first reinforcing member 3A is disposed between the first upper seal portion 44A and the first lower seal portion 45A in the vertical direction. In the illustrated example, the first reinforcing member 3A is disposed in the middle portion (not necessarily the center in the vertical direction) of the opening portion excluding the upper end and the lower end in the vertical direction, and more specifically, is disposed approximately in the middle between the first upper seal portion 44A and the first lower seal portion 45A. In this way, the efficiency of the action of the reinforcing member on the opening portion can be increased, and the opening portion can be secured to be wide in the vertical direction. The shape of the first reinforcing member 3A is not particularly limited, and in the illustrated example, it is a band-like shape extending in the direction in which the pair of side seal portions 42 are separated. The first reinforcing member 3A is made of resin and has higher rigidity than the first main body sheet 1A and the first interior sheet 2A. Moreover, the first reinforcing member 3A preferably has good flexibility and can stably maintain a straight or bent state. Furthermore, the first reinforcing member 3A is preferably made of a material having a sealant property. Specifically, it is a stretched polyolefin sheet stretched 10 to 40 times, and is produced by rolling a sheet molded by melt extrusion or the like, and further performing a stretching process so that the total stretch ratio is 10 to 40 times. One example of the first reinforcing member 3A is FORTE (registered trademark), a polyolefin sheet manufactured by Sekisui Seiki Kogyo Co., Ltd. Further, examples of the material of the first reinforcing member 3A include high-density polyethylene, low-density polyethylene, polypropylene, etc.

[0056] In the illustrated example, both ends of the first reinforcing member 3A are joined to the first main body sheet 1A and the first interior sheet 2A at a pair of side seal portions 42. Furthermore, both end edges of the first reinforcing member 3A coincide with both end edges of the first main body sheet 1A and the first interior sheet 2A.

[0057] The first intermediate outer seal portion 46A is a portion where the inner surface of the first main body sheet 1A and the first reinforcing member 3A are joined by, for example, heat sealing. In the illustrated example, the first intermediate outer seal portion 46A is formed over the entire length of the first reinforcing member 3A. The number of first intermediate outer seal portions 46A is not particularly limited, and two first intermediate outer seal portions 46A parallel to each other may be provided. Furthermore, a plurality of first intermediate outer seal portions 46A may be arranged at a distance from each other in the longitudinal direction of the first reinforcing member 3A.

[0058] The specific configuration of the first reinforcing member 3A is not limited at all, and in the illustrated example, as shown in Figs. 5 to 7, the first reinforcing member 3A has a normal width portion 31A, a wide width portion 32A, and a transition portion 33A. The normal width portion 31A fastens most of the portion of the first reinforcing member 3A located between a pair of side seal portions 42. The width W1 (the vertical dimension in Fig. 5) of the normal width portion 31A is approximately the same as the width of the material of the first reinforcing member 3A before it is used in the pouch container A1. The wide width portion 32A is the portion of the first reinforcing member 3A that is joined to the first main body sheet 1A and the first interior sheet 2A at the side seal portions 42 and the portion in the vicinity thereof. The width W2 (the vertical dimension in Fig. 5) of the wide width portion 32A is larger than the width W1. The transition portion 33A is interposed between the normal width portion 31A and the wide width portion 32A. The width of the transition portion 33A gradually increases from the normal width portion 31A toward the wide width portion 32A, and the transition portion and the wide width portion ensure a large bonding area, preventing the reinforcing member from shifting out of position. The first main body sheet 1A and the first interior sheet 2A are bonded to the periphery of the transition portion 33A, preventing the first reinforcing member 3A from shifting out of position. In addition, since the wide width portion extends downward from the normal width portion, when the side seal portion around the curved portion is bent toward either the front side or the back side, the deformation of the side seal portion can be suppressed downward, improving the opening stability of the opening portion around the normal width portion.

[0059] The first reinforcing member 3A has a normal width portion 31A, a wide width portion 32A, and a transition portion 33A, which is due to, for example, the manufacturing method of the pouch container A1. Prior to forming the side seal portion 42 in the manufacturing of the pouch container A1, the portion of the first reinforcing member 3A to be joined to the first main body sheet 1A and the first interior sheet 2A by the side seal portion 42 and the peripheral portion of the portion are heat-sealed to the first main body sheet 1A and the first interior sheet 2A using the sealing mold S1 of FIG. 5. This is intended to prevent insufficient heat sealing of the side seal portion 42 in the vicinity of the first reinforcing member 3A due to the first reinforcing member 3A still being thick in the formation of the side seal portion 42. The end portion of the first reinforcing member 3A, which had a constant width and thickness, is firmly heat-sealed, and therefore the thickness of the portion of the first reinforcing member 3A pressed by the sealing mold S1 is reduced and the width is expanded. This forms the wide width portion 32A. That is, the wide portion 32A is formed by purposely crushing a part of the reinforcing member. Note that, in the manufacture of the pouch container A1, after the side seal portion 42 is formed, the end portion of the first reinforcing member 3A can be heat-sealed to the first main body sheet 1A and the first interior sheet 2A using the sealing mold S1 in Fig. 5, or the wide portion 32A can be formed in one process without being divided into multiple processes by changing the conditions of the sealing mold (shape, etc.), heat (heat seal temperature), and pressure (clamping pressure, etc.).

[0060] As shown in Figs. 1 to 7, the second reinforcing member 3B is provided between the second main body sheet 1B and the second interior sheet 2B. The second reinforcing member 3B is provided between the second upper seal portion 44B and the second lower seal portion 45B in the up-down direction. In the illustrated example, the second reinforcing member 3B is provided approximately midway between the second upper seal portion 44B and the second lower seal portion 45B. The specific position of the second reinforcing member 3B is not particularly limited, and in the illustrated example, as shown in Fig. 6, the second reinforcing member 3B is provided at a position overlapping the first reinforcing member 3A. The shape of the second reinforcing member 3B is not particularly limited, and in the illustrated example, the second reinforcing member 3B is a strip-like shape extending in the direction in which the pair of side seal portions 42 are separated. Like the first reinforcing member 3A, the second reinforcing member 3B is made of resin and has higher rigidity than the second main body sheet 1B and the second interior sheet 2B. In addition, the second reinforcing member 3B preferably has good flexibility and can stably maintain a straight or bent state. Furthermore, the second reinforcing member 3B is preferably made of a material having a sealant property. An example of the material of the second reinforcing member 3B is the same as the material of the first reinforcing member 3A. The material of the second reinforcing member 3B may be the same as or different from the material of the first reinforcing member 3A.

[0061] In the illustrated example, both ends of the second reinforcing member 3B are joined to the second main body sheet 1B and the second interior sheet 2B at a pair of side seal portions 42. Furthermore, both end edges of the second reinforcing member 3B coincide with both end edges of the second main body sheet 1B and the second interior sheet 2B.

[0062] The second intermediate outer seal portion 46B is a portion where the inner surface of the second main body sheet 1B and the second reinforcing member 3B are joined by, for example, heat sealing. In the illustrated example, the second intermediate outer seal portion 46B is formed over the entire length of the second reinforcing member 3B. The number of second intermediate outer seal portions 46B is not particularly limited, and two second intermediate outer seal portions 46B parallel to each other may be provided. Furthermore, the multiple second intermediate outer seal portions 46B may be arranged at a distance from each other in the longitudinal direction of the second reinforcing member 3B.

[0063] The specific configuration of the second reinforcing member 3B is not limited in any way, and in the illustrated example, it has a normal width portion 31B, a wide width portion 32B, and a transition portion 33B as shown in Figures 6 and 7. The configurations of the normal width portion 31B, the wide width portion 32B, and the transition portion 33B are similar to those of the normal width portion 31A, the wide width portion 32A, and the transition portion 33A.

[0064] Each sheet constituting the pouch container A1 is usually made of a resin film. The resin film constituting the sheet is required to have basic performance as a package, such as impact resistance, abrasion resistance, and heat resistance. In addition, since each of the above-mentioned seal parts and the above-mentioned joint parts are usually formed by heat sealing, the sheet is also required to have sealant properties. As the sheet, a multilayer sheet having a base film layer and a sealant layer that imparts sealant properties is suitable, and when high gas barrier properties or light blocking properties are required, it is suitable to provide a barrier layer between the base film layer and the sealant layer. The barrier properties may be imparted to the base film layer itself. In this case, the barrier layer is used as the base film layer, and the sheet is a multilayer sheet having a barrier layer and a sealant layer. In addition, when the sealant properties are imparted to both sides of the sheet, a monolayer film that forms a sealant layer described later may be used, and in the case of a multilayer sheet, a sheet having two layers of the same or different sealant layers (in this case, one of the sealant layers is formally used as the base film layer), or a sheet having a sealant layer on both sides of the base film layer may be used. In this embodiment, multi-layer sheets each having a base film layer on the outer surface and a sealant layer on the inner surface are used as the first main body sheet 1A and the second main body sheet 1B, and sheets each having a sealant layer on both the outer surface and the inner surface are used as the first interior sheet 2A and the second interior sheet 2B.

[0065] Here, examples of the materials constituting the base film layer, the sealant layer, and the gas barrier layer are given below. The lamination of each of these layers can be performed by a conventional lamination method, such as dry lamination using an adhesive, lamination using a solventless adhesive, or thermal lamination in which a thermally adhesive layer is sandwiched and bonded by heat, or extrusion lamination in which a resin that will become the sealant layer is melt-extruded onto the base film layer.

[0066] Examples of films constituting the base film layer include single-layer or double-layer or more stretched or unstretched films made of polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), etc.), polyolefin (polyethylene (PE), polypropylene (PP)), polyamide (nylon-6, nylon-66, etc.), polyacrylonitrile (PAN), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), etc., and particularly preferred are biaxially oriented PET films and biaxially oriented polyamide films having a thickness of 9 to 30 μm.

[0067] Examples of the resin layer constituting the sealant layer include a film or extrusion laminated resin of one or more layers composed of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), ethylene-propylene copolymer (EP), unoriented polypropylene (CPP), ethylene-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. The thickness of the sealant layer is 20 to 150 μm, preferably 40 to 120 μm. It is preferable that the sealant layer on the inner surface of the first interior sheet 2A and the second interior sheet 2B has a higher melting point (is heat-sealed at a high temperature) than the sealant layer between the inner surface of the first main body sheet 1A and the second main body sheet 1B and the outer surface of the first interior sheet 2A and the second interior sheet 2B. Such a melting point difference can be achieved, for example, by using LDPE and LLDPE types with different melting points, by using HDPE with a higher melting point than LDPE (LLDPE), or by using EP or CPP (homo PP, random PP) with a higher melting point than LDPE (LLDPE).

[0068] Examples of the gas barrier layer include a thin metal film such as aluminum, a resin film such as polyvinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or a film obtained by vapor-depositing (or sputtering) aluminum, aluminum oxide, silica, or other inorganic oxides onto any synthetic resin film (which may be, for example, a base film layer).

[0069] It is preferable that the first main body sheet 1A or the second main body sheet 1B is provided with a scale (not shown) for measuring the amount of liquid of the nutrient. In addition to the scale, a printed layer may be provided that displays the product name, ingredients, precautions for use, etc. The printed layer can be provided on the base film layer by gravure printing or flexo printing.

[0070] There is no limitation on the thickness of the first main body sheet 1A, the second main body sheet 1B, the first interior sheet 2A, the second interior sheet 2B, the first reinforcing member 3A, and the second reinforcing member 3B. In the case where the respective materials are the above-mentioned examples, the thickness of the first main body sheet 1A, the second main body sheet 1B, the first interior sheet 2A, and the second interior sheet 2B is, for example, 80 μm to 170 μm, the thickness of the first reinforcing member 3A and the second reinforcing member 3B is, for example, 300 μm to 1000 μm, and the width is 1.5 mm to 20 mm. In this case, the thickness of the first reinforcing member 3A and the second reinforcing member 3B is thicker than the thickness of the first main body sheet 1A, the second main body sheet 1B, the first interior sheet 2A, and the second interior sheet 2B.

[0071] 8 shows the state in which the opening 52 of the pouch container A1 is expanded. This expansion is performed by pressing the curved portions 423 as pressing operation portions of the pair of side seal portions 42 from both sides with fingers or the like (for example, by gripping with the thumb and index finger). When the pair of curved portions 423 are pressed, a force is applied to curve the first reinforcing member 3A and the second reinforcing member 3B, and the first main body sheet 1A and the first interior sheet 2A and the second main body sheet 1B and the second interior sheet 2B are separated from each other. This expands the opening 52. Note that in this example, the curved portions 423 are provided, but instead of the curved portions, holes through which fingers can be inserted may be provided by partially expanding the width of the side seal portions 42.

[0072] As can be seen from Fig. 1 and Fig. 8, in this embodiment, the length dimension Lb of the reinforcing members 3A, 3B arranged above the opening is made larger than the container inner dimension La of the curved portion 423 in the side seal portion 42. This makes it easy for female nurses with small hands to handle, and when transferring contents from a container held in one hand to a container held in the other hand in a situation where complicated operations are necessary, nutrients, medicines, water, etc. are less likely to spill, making it easy to administer a specified volume. In addition, when the opening shape is such that the container inner dimension increases toward the top, the deformed shape above the opening is difficult to stabilize, but since Lb is larger than La, it is easy to stably form a smooth curved shape in the circumferential direction up to the top end. Incidentally, in this embodiment, the opening portion is located above the storage section 51 in which the liquid is stored, and is a portion of the area extending to the opening edge (opening 52), with a chuck 53 disposed near the lower end of the opening portion, and the opening portion includes a tapered portion whose inner dimensions widen toward the upper end (opening edge).

[0073] In this embodiment, the reinforcing members 3A and 3B have a deformation rigidity greater than at least the main body sheet, and more preferably greater than the zipper. The reinforcing members 3A and 3B have flexibility (deformability) due to an external force, and the deformation rigidity of the reinforcing members does not elastically return to the original shape when deformed, but has a plastic deformation characteristic, has a shape retention force in a deformed state, and has a deformation rigidity in the deformed state.

[0074] The chuck 53 of this embodiment is composed of a pair of chuck members each including a pair of tape-shaped base portions that are overlapped and welded to each main body sheet, and engaging portions that protrude from the opposing surfaces of the base portions and are integrally formed to releasably engage with each other. Compared to the base portions of the chuck 53, the reinforcing members 3A and 3B of this embodiment are made thicker, improving the shape retention characteristics.

[0075] In addition, the reinforcing members 3A and 3B in this embodiment have a width dimension (vertical dimension of the main body sheet) that is 1 / 2 or more, more preferably 2 / 3 or more, of the width dimensions of the side seal parts 42 and the bottom seal part 41 at both side edges of the main body sheet. In addition, by increasing the width dimensions of the reinforcing members 3A and 3B, twisting deformation can be suppressed, the deformed shape can be stabilized, and the adhesive area to the main body sheet can be improved. In addition, the width dimensions of the reinforcing members 3A and 3B are formed to be equal to or larger than the width of the base part of the chuck, so that the shape retention characteristics are improved. In addition, the reinforcing members can be provided with protrusions that partially protrude in the width direction (vertical direction of the main body sheet) or with unevenness such as embossing on the outer surface or inner surface that is overlapped with the main body sheet, etc., thereby improving the adhesive force and the efficiency of transmitting force to the main body sheet.

[0076] Next, the function of the pouch container A1 will be described.

[0077] According to this embodiment, the first reinforcing member 3A is provided between the first main body sheet 1A and the first interior sheet 2A. That is, no additional sheet member or the like is attached to the outer surface of the first main body sheet 1A for providing the first reinforcing member 3A. Therefore, it is possible to make the outer surface property of the first main body sheet 1A smoother. Next, the first reinforcing member 3A is made of resin, like the first main body sheet 1A and the first interior sheet 2A. Therefore, the pouch container A1 does not contain metal, and when the pouch container A1 is discarded, the first reinforcing member 3A can be recycled or disposed of as resin without separating it. In addition, since the first main body sheet 1A and the first interior sheet 2A are joined over the entire width by the first lower seal portion 45A, it is possible to prevent, for example, foreign matter generated from the first reinforcing member 3A from leaking into the storage portion 51. And, the first reinforcing member 3A, which has flexibility and rigidity capable of maintaining its shape, is joined at the side seal portion 42. This makes it easier for the force generated when the curved portion 423 is pressed to be transmitted to the first reinforcing member 3A, making it possible to more reliably curve the entire first reinforcing member 3A. Once curved, the first reinforcing member 3A maintains the curved state well. Therefore, according to the pouch container A1, it is possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface of the first main body sheet 1A and reducing the burden of sorting. The first reinforcing member 3A is able to maintain the shape of the opening 52 in both the opened and closed states.

[0078] In particular, as shown in the example, in a container having an opening portion whose upper width dimension is larger than its lower width dimension, the reinforcing member is located on the side seal portion, and the side seal portion has different rigidity in the vertical direction. Therefore, when the curved portion 423 is pressed, the side seal portion around the curved portion 423 is likely to be curved toward the front side or rear side, and the upper part of the opening is also likely to be curved toward the front side or rear side via the side seal portion. However, since the first reinforcing member 3A is fixed on the side seal portion 42 of the opening, even if the side seal portion around the curved portion 423 is curved toward the front side or rear side when the curved portion 423 is pressed, the rigidity of the reinforcing member can prevent the side seal portion around the reinforcing member from being curved toward the front side or rear side. This can prevent the side of the opening portion from being pulled by the side seal portion that is curved toward either the front side or rear side, resulting in an irregular opening shape.

[0079] In addition, since bags for enteral nutrition are used in large quantities, thin-walled containers with low rigidity (for example, containers with a base film made of one or more layers of stretched or unstretched film) are preferred to reduce manufacturing costs, but in this case, the pressed portion of the container is easily distorted when pressed with a finger from the side. By positioning a reinforcing member above the opening, even if the pressed portion of the container is significantly distorted, the portion above the opening is less likely to be significantly distorted.

[0080] In addition, the upper part of the reinforcing member located within the opening is longer in the width direction than the lower part, so that when the reinforcing part bends, the force can be transmitted to the container more widely at the upper part, and a force that opens the container more widely is generated at the upper part of the opening.

[0081] Furthermore, according to the pouch container A1 of this embodiment, the first reinforcing member 3A is located on the inside of the first main body sheet 1A and on the side seal portion 42, so that the outer surface property of the first main body sheet 1A is smoothed. Therefore, compared to when the first reinforcing member 3A is located on the outside of the first main body sheet 1A, fingers are less likely to hit the first reinforcing member 3A, and even if they do hit, the sheet or first reinforcing member 3A are less likely to deform toward either the front or back side.

[0082] In addition, the first reinforcing member 3A in this embodiment is made of a non-metallic material such as cardboard or resin, which reduces the burden of sorting and more reliably maintains the shape of the opening 52. The first reinforcing member 3A can maintain the shape of the opening 52 in both the opened and closed states.

[0083] The pouch container A1 includes a second reinforcing member 3B in addition to a first reinforcing member 3A. This makes it possible to more reliably expand the opening 52 from both the side of the first main body sheet 1A and the first interior sheet 2A and the side of the second main body sheet 1B and the second interior sheet 2B, which is preferable for maintaining the shape of the opening 52.

[0084] Both ends of the first reinforcing member 3A and the second reinforcing member 3B are joined at a pair of side seal portions 42. This allows the operating force to be efficiently transmitted throughout the entire first reinforcing member 3A and the second reinforcing member 3B when the pair of curved portions 423 are pressed. For example, if the longitudinal ends of the first reinforcing member 3A and the second reinforcing member 3B do not reach the side seal portions 42, the deformation rigidity changes significantly near the ends of the reinforcing members, and stress and strain tend to concentrate. However, by having the longitudinal ends of the first reinforcing member 3A and the second reinforcing member 3B reach the side seal portions 42, the deformed shape of the opening is stabilized.

[0085] In the illustrated example, both ends of the first reinforcing member 3A and the second reinforcing member 3B and both side edges of the first main body sheet 1A, the second main body sheet 1B, the first interior sheet 2A, and the second interior sheet 2B are aligned with each other. This allows the area of ​​the first reinforcing member 3A and the second reinforcing member 3B that is joined at the side seal portion 42 to be enlarged, which is preferable for fixing the first reinforcing member 3A and the second reinforcing member 3B. This configuration can be obtained when, in a manufacturing method for a pouch container A1, a long sheet material that will become the first main body sheet 1A, the second main body sheet 1B, the first interior sheet 2A, and the second interior sheet 2B is overlapped with a long strip material that will become the first reinforcing member 3A and the second reinforcing member 3B, and after forming the bottom seal portion 41, the pair of side seal portions 42, and the like, the pouch container A1 is manufactured by punching and cutting them together. Therefore, this configuration is suitable for continuously and efficiently manufacturing a plurality of pouch containers A1. Furthermore, if the sealant layers on the inner surfaces of the first interior sheet 2A and the second interior sheet 2B have a higher melting point than the sealant layers on the inner surfaces of the first main body sheet 1A and the second main body sheet 1B and the outer surfaces of the first interior sheet 2A and the second interior sheet 2B, then by heat-sealing them simultaneously at an appropriate temperature, it is possible to fix the first reinforcing member 3A between the first main body sheet 1A and the first interior sheet 2A, and to fix the second reinforcing member 3B between the second main body sheet 1B and the second interior sheet 2B, without thermally fusing the inner surfaces of the first interior sheet 2A and the second interior sheet 2B to each other.

[0086] The first reinforcing member 3A is joined to the first main body sheet 1A by a first intermediate outer seal portion 46A, and the second reinforcing member 3B is joined to the second main body sheet 1B by a second intermediate outer seal portion 46B. This allows the first main body sheet 1A and the second main body sheet 1B to be closely attached to each other by the first reinforcing member 3A and the second reinforcing member 3B. This is preferable for defining the shapes of the first main body sheet 1A and the second main body sheet 1B by the first reinforcing member 3A and the second reinforcing member 3B.

[0087] The portions of the pair of inner edges 421 that overlap the first interior sheet 2A and the second interior sheet 2B are inclined in the direction described above. As a result, when the opening 52 is in a widened state, as shown in Fig. 8, a funnel-shaped portion with a wide opening at the top end of the storage section 51 is formed. This funnel-shaped portion makes it easier to fill the storage section 51 with contents.

[0088] 9 to 28 show other embodiments of the present invention. In these figures, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as those in the above embodiment.

[0089] <First Modification of First Embodiment> FIG. 9 is an enlarged cross-sectional view of a main part showing a first modified example of the pouch container A1. In the pouch container A11 of this modified example, the upper end of the first main body sheet 1A is misaligned with the upper end of the first interior sheet 2A, and the upper edge of the first main body sheet 1A is located higher. Also, the upper edge of the second main body sheet 1B is misaligned with the upper edge of the second interior sheet 2B, and the upper end of the second main body sheet 1B is located higher. This modified example also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. As can be seen from this modified example, the edges of the sheets constituting the pouch container A1 may be aligned with each other or may be partially misaligned.

[0090] <Second Modification of First Embodiment> 10 is an enlarged cross-sectional view of a main part showing a second modified example of the pouch container A1. In the pouch container A12 of this modified example, the upper edge of the first interior sheet 2A is located above the upper edge of the first main body sheet 1A, and the upper edge of the second interior sheet 2B is located above the upper edge of the second main body sheet 1B. This modified example also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. As can be seen from this modified example, the manner in which the edges of the sheets constituting the pouch container A1 are partially misaligned can be set in various ways.

[0091] <Third Modification of First Embodiment> 11 is an enlarged cross-sectional view of a main part showing a second modified example of the pouch container A1. In the pouch container A13 of this modified example, the configurations of the first upper fixing part and the second upper fixing part of the present invention are different from those of the above-mentioned example. In this modified example, a first folded part 61A is provided as the first upper fixing part, and a second folded part 61B is provided as the second upper fixing part.

[0092] The upper edges of the first main body sheet 1A and the first interior sheet 2A are connected to each other over their entire length via the first folded-back portion 61A. That is, in the illustrated example, the first main body sheet 1A and the first interior sheet 2A are formed from a single continuous sheet material. The upper edges of the second main body sheet 1B and the second interior sheet 2B are connected to each other over their entire length via the second folded-back portion 61B. That is, in the illustrated example, the second main body sheet 1B and the second interior sheet 2B are formed from a single continuous sheet material. In this example, the outer surfaces of the first main body sheet 1A and the second main body sheet 1B are connected to the inner surfaces of the first interior sheet 2A and the second interior sheet 2B. For this reason, it is preferable that the outer surfaces of the first main body sheet 1A and the second main body sheet 1B are formed from a sealant layer.

[0093] This modification also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. As can be seen from this modification, the specific configurations of the first upper fixing portion and the second upper process portion of the present invention can be set in various ways.

[0094] <Fourth Modification of First Embodiment> Fig. 12 is a front view of a main portion of a fourth modified pouch container A1, and Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12. In the pouch container A11 of this modified example, the above-mentioned first intermediate outer seal portion 46A and second intermediate outer seal portion 46B are not provided. The first reinforcing member 3A and the second reinforcing member 3B are not joined to the first main body sheet 1A and the first interior sheet 2A, and the second main body sheet 1B and the second interior sheet 2B, between a pair of side seal portions 42.

[0095] Even in such a modified example, at least one end of each of the first reinforcing member 3A and the second reinforcing member 3B is joined at the side seal portion 42, so that the opening 52 can be appropriately widened.

[0096] <Fifth Modification of First Embodiment> 14 is a cross-sectional view showing a fifth modified example of the pouch container A1. The pouch container A15 of this modified example has a first intermediate inner seal portion 47A and a second intermediate inner seal portion 47B in addition to a first intermediate outer seal portion 46A and a second intermediate outer seal portion 46B. The first intermediate inner seal portion 47A is a portion where the first reinforcing member 3A and the inner surface of the first interior sheet 2A are joined by heat sealing or the like. The second intermediate inner seal portion 47B is a portion where the second reinforcing member 3B and the inner surface of the second interior sheet 2B are joined by heat sealing.

[0097] Even in such a modified example, at least one end of each of the first reinforcing member 3A and the second reinforcing member 3B is joined at the side seal portion 42, so that the opening 52 can be appropriately expanded. Also, the first main body sheet 1A and the first interior sheet 2A, and the second main body sheet 1B and the second interior sheet 2B are joined to the first reinforcing member 3A and the second reinforcing member 3B, respectively, so that the shape-maintaining function of the first reinforcing member 3A and the second reinforcing member 3B can be improved. As can be seen from the pouch container A1, the pouch container A14, and the pouch container A15, it is arbitrary which of the first intermediate outer seal portion 46A, the second intermediate outer seal portion 46B, the first intermediate inner seal portion 47A, and the second intermediate inner seal portion 47B is to be adopted and can be set appropriately.

[0098] <Second embodiment> 15 is a front view of a main part of a pouch container according to a second embodiment of the present invention. The pouch container A2 of this embodiment differs from the above-mentioned embodiment in the relationship between the first reinforcing member 3A and the second reinforcing member 3B and the pair of side seal portions 42. In the illustrated pouch container A2, both ends of the first reinforcing member 3A are offset from both side edges of the pair of side seal portions 42 (the first main body sheet 1A and the first interior sheet 2A) and are located inward in the width direction from these. Similarly, both ends of the second reinforcing member 3B are offset from both side edges of the pair of side seal portions 42 (the second main body sheet 1B and the second interior sheet 2B) and are located inward in the width direction from these.

[0099] Even in this embodiment, it is possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface and reducing the burden of sorting. Furthermore, the pouch container A2 is suitable for a manufacturing method in which material members to become the first reinforcing member 3A and the second reinforcing member 3B are intermittently supplied.

[0100] <First Modification of Second Embodiment> 16 is a front view of a main part showing a first modified example of the pouch container A2. In the pouch container A21 of this modified example, one end of the first reinforcing member 3A reaches one of the side seal parts 42, but the other end does not reach the other side seal part 42. The other end of the second reinforcing member 3B may also not reach the side seal part 42. Even with such a modified example, the shape of the opening 52 can be more reliably maintained while smoothing the outer surface properties and reducing the burden of sorting. Moreover, it is sufficient that at least one end of the first reinforcing member 3A and the second reinforcing member 3B reaches the side seal part 42.

[0101] In this way, by separating the reinforcing members from the side seal portions of the main sheet at the ends in the length direction, it is possible to avoid the deformation constraint caused by the reinforcing members at the inner peripheral ends of the side seal portions, and to bend the pair of main sheets toward opposite sides to open more widely on both sides, etc. Also, by separating the reinforcing members from the side seal portions of the main sheet at the ends in the length direction, it is possible to adjust the opening resistance force caused by the reinforcing members, for example by reducing it.

[0102] <Third embodiment> 17 is a front view of a main part of a pouch container according to a third embodiment of the present invention. The pouch container A3 of this embodiment differs from the above-described embodiments in the vertical positions of the first reinforcing member 3A and the second reinforcing member 3B. In the illustrated example, the first reinforcing member 3A is disposed closer to (upper than) the first upper seal portion 44A in the vertical direction. Similarly, the second reinforcing member 3B may also be disposed closer to (upper than) the second upper seal portion 44B.

[0103] This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface and reducing the burden of sorting. In addition, the first reinforcing member 3A and the second reinforcing member 3B are located toward the top, which is suitable for more reliably maintaining the shape of the upper end of the pouch container A3.

[0104] <First Modification of Third Embodiment> 18 is a front view of a main part of a first modified pouch container A3. In the pouch container A31 of this modified example, the first reinforcing member 3A is disposed closer to the first lower seal portion 45A (lower) in the vertical direction. Similarly, the second reinforcing member 3B may also be disposed closer to the second lower seal portion 45B (lower).

[0105] This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. Furthermore, the fact that the first reinforcing member 3A and the second reinforcing member 3B are located toward the bottom is suitable for more reliably maintaining the shape of the pouch container A3 near the zipper 53. Furthermore, if the first reinforcing member 3A and the second reinforcing member 3B are provided at a position overlapping the pair of curved portions 423, there is an advantage in that the first reinforcing member 3A and the second reinforcing member 3B can be more easily curved by pressing the pair of curved portions 423.

[0106] <Second Modification of Third Embodiment> FIG. 19 is a front view of a main part showing a second modified example of the pouch container A3. In the pouch container A32 of this modified example, the first reinforcing member 3A and the second reinforcing member 3B are located below the zipper 53. The lower end edges of the first interior sheet 2A and the second interior sheet 2B are located below the zipper 53, and the first lower seal portion 45A and the second lower seal portion 45B are also provided below the zipper 53. In this case, the zipper 53 is provided on the inner side of the first interior sheet 2A and the second interior sheet 2B. This modified example can also more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. In the illustrated example, the zipper 53 is provided near the curved portion 423, but the zipper 53 may be provided near the upper end of the opening 52. As can be understood from this modified example, the positional relationship between the first reinforcing member 3A and the second reinforcing member 3B and the zipper 53 in the vertical direction is not limited in any way.

[0107] <Fourth embodiment> Fig. 20 is a front view of a main part of a pouch container according to a fourth embodiment of the present invention, Fig. 21 is an enlarged plan view of the main part, and Fig. 22 is an enlarged cross-sectional view of the main part along line XXII-XXII in Fig. 21. The pouch container A4 of this embodiment has a first easy-to-fold portion 71A and a second easy-to-fold portion 71B. The first easy-to-fold portion 71A is a portion where the thickness of the first reinforcing member 3A is partially thin. The second easy-to-fold portion 71B is a portion where the thickness of the second reinforcing member 3B is partially thin. In the illustrated example, the first reinforcing member 3A and the second reinforcing member 3B are provided slightly outboard of the inner edge 421 in the width direction and overlap with the side seal portion 42. As shown in FIG. 22, in the illustrated example, the first fold-easy portion 71A and the second fold-easy portion 71B are formed by recessing a portion of the first reinforcing member 3A and the second reinforcing member 3B into a triangular groove shape via the first main body sheet 1A and the second main body sheet 1B.

[0108] This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. Furthermore, by providing the first and second fold-easy portions 71A and 71B, when the pair of curved portions 423 is pressed, the first and second reinforcing members 3A and 3B can be more easily folded at the first and second fold-easy portions 71A and 71B. Therefore, the opening 52 can be opened smoothly with less force.

[0109] <First Modification of Fourth Embodiment> 23 is an enlarged cross-sectional view of a main part showing a first modified example of the pouch container A4. In the pouch container A41 of this modified example, the first and second easy-to-fold portions 71A and 71B are formed by partially cutting the first and second reinforcing members 3A and 3B. The cross-sectional area of ​​the cut portions of the first and second reinforcing members 3A and 3B is zero. The first and second easy-to-fold portions 71A and 71B in the present invention are a concept including a configuration in which the cross-sectional area is zero.

[0110] <Second Modification of Fourth Embodiment> FIG. 24 is a front view of a main part showing a second modified example of the pouch container A4. In the pouch container A42 of this modified example, three first fold-easy parts 71A are provided. A pair of the first fold-easy parts 71A are provided at positions overlapping a pair of the side seal parts 42, and one first fold-easy part 71A is provided between them. This modified example also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. In addition, since the first fold-easy part 71A is provided approximately at the center of the first reinforcing member 3A, it is possible to more easily fold the vicinity of the center of the first reinforcing member 3A, and the opening area of ​​the opening 52 can be enlarged. The second fold-easy part 71B may be arranged in the same manner as the first fold-easy part 71A.

[0111] <Third Modification of Fourth Embodiment> 25 is a front view of a main part showing a third modified example of the pouch container A4. In the pouch container A43 of this modified example, two first easy-to-fold portions 71A are provided spaced apart from each other between a pair of side seal portions 42. This modified example also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. As can be seen from this modified example, the number and arrangement of the first easy-to-fold portions 71A are not limited in any way. The second easy-to-fold portions 71B may be the same in number and arrangement as the first easy-to-fold portions 71A.

[0112] <Fifth embodiment> 26 is a front view of a main part of a pouch container according to a fifth embodiment of the present invention. The pouch container A5 of this embodiment differs from the above-described embodiments in the configuration of the first upper seal portion 44A. In this embodiment, the first upper seal portion 44A is interrupted substantially in the center. However, the first lower seal portion 45A is provided over the entire width.

[0113] This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. Even if the first upper seal portion 44A is interrupted, the portion where the first upper seal portion 44A is interrupted is not directly connected to the storage portion 51. Therefore, it is possible to prevent foreign matter, etc., caused by the first reinforcing member 3A from leaking into the storage portion 51.

[0114] Sixth Embodiment 27 is an enlarged cross-sectional view of a main part of a pouch container according to a sixth embodiment of the present invention. In the pouch container A6 of this embodiment, the first reinforcing member 3A and the second reinforcing member 3B are arranged so as to be vertically offset from each other. This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. In addition, compared to a configuration in which the first reinforcing member 3A and the second reinforcing member 3B overlap, it is possible to reduce the thickness of the portion of the side seal portion 42 that overlaps with the first reinforcing member 3A and the portion that overlaps with the second reinforcing member 3B.

[0115] Seventh embodiment 28 is an enlarged cross-sectional view of a main part of a pouch-container according to a seventh embodiment of the present invention. The pouch-container A7 of this embodiment differs from the above-described embodiments in that it includes only a first reinforcing member 3A and does not include a second reinforcing member 3B.

[0116] This embodiment also makes it possible to more reliably maintain the shape of the opening 52 while smoothing the outer surface properties and reducing the burden of sorting. As can be seen from this embodiment, the pouch container A7 may be configured to include only the first reinforcing member 3A and not include the second reinforcing member 3B. Even in this configuration, the shape-maintaining function of the first reinforcing member 3A allows the pouch container A7 to appropriately maintain the open state, etc.

[0117] Eighth embodiment FIG. 29 is a perspective explanatory view showing an example of a pouch container product according to the eighth embodiment of the present invention. In this embodiment, any of the pouch containers A8 according to the first to seventh embodiments can be used. The pouch container A8 includes a discharge section for discharging the stored liquid through the discharge section 54 (see FIG. 1), such as a tube 80 forming an external flow path and a cylindrical connector for connecting the tube 80. In this embodiment, a flow path device 82 such as a chamber (drip tube), a clamp (flow rate regulator), a connector, etc. (none of which are shown) is also attached to the tube 80. It is to be noted that the tube 80 and the flow path device 82 are preferably connected to the discharge section 54 of the pouch container A8, but may be in a separated state (for example, a device to be selectively used) as necessary.

[0118] The pouch container A8 is housed in a bag-shaped sealed case 84 together with the tube 80 and the flow path device 82. In this housed state, the pouch container A8 is folded up and down. The folded state is preferably a state where the folds are folded in two, three, or four, etc., into a curved round shape, or a state where the entire container is rolled up and compressed in one radial direction and crushed into an elliptical or oval shape, but any folded state in which the container is not flattened out, or folded 180 degrees along the curved folds and overlapped in a tightly packed state, is acceptable.

[0119] The pouch container A8 thus folded and stored is preferably stored in the sealed case 84 with the tube 80 and the flow path device 82 at least partially inserted inside the folded pouch container A8, i.e., with the discharge portions of the tube 80, the flow path device 82, etc., wrapped in the rolled pouch container A8. After storage, the sealed case is sterilized as necessary.

[0120] The sealed case 84 housing the pouch container A8 in this manner has a certain amount of space inside, and even if it is made of a soft sheet, it maintains a certain amount of thickness. By utilizing the internal space, the opening of the pouch container A8 is maintained in an open state, even if only slightly. Such an open state can be understood by referring to, for example, Figs. 4, 7, 13, and 14. In particular, as shown in each of the above-mentioned embodiments, a reinforcing member is provided at the opening, and the opening is maintained in a pre-established open state based on the deformation rigidity of the reinforcing member.

[0121] Therefore, in the medical pouch container product 90 of this embodiment, when the pouch container A8 is taken out by opening the sealed case in the medical field, the opening portion is already open (the zipper 53 is not closed), so that the opening operation portion (curved portion 423, 423) of the side seal portions 42, 42 on both sides in the width direction can be easily, quickly, and stably opened wide by simply pressing them inward with fingers so that they approach each other. In addition, since the reinforcing member is located above the zipper, the side that is desired to be opened when injecting nutrients, that is, the upper side rather than the lower side of the zipper, opens wide. Therefore, it is suitable for use in medical fields where an emergency is required, and there is no need to insert fingers into the inside of both sheets forming the opening portion to open the opening portion, and it is also possible to avoid the risk of bacteria adhesion due to contact of fingers with the inner surface of the opening portion. In addition, when the zipper 53 is opened, it can be slightly curved in the direction in which the opening portion is opened by the engagement portion protruding inward from both base portions.

[0122] The pouch container according to the present invention is not limited to the above-mentioned embodiment, and the specific configuration of each part of the pouch container according to the present invention can be freely designed in various ways.

[0123] For example, the first body sheet 1A and the second body sheet 1B can be formed from a single continuous sheet folded back at the bottom side of the lower edge, in which case the bottom seal 41 at the lower end is not essential. Similarly, the first body sheet 1A and the second body sheet 1B can be formed from a single continuous sheet folded back at one edge in the sheet width direction, in which case the side seal 42 at the folded back edge is not essential. Also, it is possible to form the first body sheet 1A and the second body sheet 1B from a single sheet continuous at both side edges in the width direction by cutting a cylindrical molded sheet to a predetermined length in the cylindrical length direction and welding the bottom side to form the bottom seal 41.

[0124] The shape of the opening of the pouch container is not limited to the tapered shape expanding upward as shown in the example, but may be a straight tubular opening, a tapered shape with an inclined portion only on one side in the width direction of the main body sheet, or a tapered shape with an inclined portion with different inclination angles on both sides. Furthermore, the opening, particularly the upper end side, may be in the form of a flap in which one or both side seal portions 42 in the width direction of the main body sheet are absent and the first main body sheet 1A and the second main body sheet 1B open apart from each other in the overlapping direction. When the upper end side of the opening is in the form of a flap, the opening area can be increased even if a straight tubular opening is adopted, and even if the reinforcing member is disposed at the same position as or below the zipper, or the length of the reinforcing member is shorter than the sealing portion, the upper part of the opening can be opened relatively easily. Even if the upper end side of the opening is in the form of a flap, it is preferable that the end of the reinforcing member is located on the side seal portion. Also, a zipper is used as the sealing part of the pouch container, but this is not limited thereto. For example, the pouch container may be folded to achieve sealing. Also, a third and fourth reinforcing member may be provided instead of the sealing member, and it is particularly preferable to provide a third and fourth reinforcing member having a lower rigidity than the first and second reinforcing members. Also, although the opening operability is inferior, the reinforcing member may not be pre-curved, and a band may be provided on the main surface and the back surface so that the user can pull the band to make the shape. Also, the reinforcing member may be provided only on the main surface and a band on the back surface, and the band may be a ring-shaped body into which a finger can be inserted. Also, a material other than synthetic resin may be used as the reinforcing member, and for example, a wide band-shaped cardboard may be used as the reinforcing member. In this case, a reinforcing member storage space may be formed between the main body sheet and the interior sheet or between the main body sheet and the exterior sheet, and the cardboard may be stored inside the space, and the sheets may be joined to each other around the cardboard so that the cardboard does not shift out of position.

[0125] [Appendix 1] a first main body sheet and a second main body sheet overlapped with each other; a pair of side seal portions at both side edges of the first main body sheet and the second main body sheet in the width direction; a storage section for storing contents, the storage section being surrounded by the first main body sheet, the second main body sheet, and the pair of side seal portions; an opening connected to the storage portion and defined by upper edges of the first main body sheet and the second main body sheet, a first interior sheet provided on the inner side of the first main body sheet and joined to the first main body sheet and the second main body sheet at the pair of side seal portions; a first reinforcing member made of resin and provided between the first main body sheet and the first interior sheet; a first upper fixing portion to which the first main body sheet and the first interior sheet are fixed on an upper side of the first reinforcing member; a first lower fixing portion at which the first main body sheet and the first interior sheet are fixed on a lower side of the first reinforcing member, A pouch container, characterized in that the first reinforcing member has a higher rigidity than the first main body sheet and the first interior sheet, and is joined to the first main body sheet and the first interior sheet at at least one of the pair of side seal portions. [Appendix 2] 2. The pouch container according to claim 1, wherein the first reinforcing member is joined to the first main body sheet and the first interior sheet at both of the pair of side seal portions. [Appendix 3] The pouch container according to claim 2, wherein both ends of the first reinforcing member and both side ends of the first main body sheet, the second main body sheet, and the first interior sheet are aligned with each other. [Appendix 4] A pouch container as described in any one of Appendices 1 to 3, wherein the inner end edges of the pair of side seal portions that overlap the first interior sheet are inclined so as to be positioned more inward in the width direction as they extend downward. [Appendix 5] 5. The pouch container according to any one of claims 1 to 4, further comprising a first easily-folded portion in which the thickness of the first reinforcing member is partially reduced. [Appendix 6] 6. The pouch container according to any one of claims 1 to 5, further comprising a first intermediate outer seal portion where the first main body sheet and the first reinforcing member are joined. [Appendix 7] a second interior sheet provided on the inner side of the second main body sheet and joined to the first interior sheet and the second main body sheet at the pair of side seal portions; a second reinforcing member made of resin and provided between the second main body sheet and the second interior sheet; a second upper fixing portion to which the second main body sheet and the second interior sheet are fixed on an upper side of the second reinforcing member; a second lower fixing portion to which the second main body sheet and the second interior sheet are fixed on the lower side of the second reinforcing member, The pouch container according to any one of claims 1 to 5, wherein the second reinforcing member has a higher rigidity than the second main body sheet and the second interior sheet, and is joined to the second main body sheet and the second interior sheet at at least one of the pair of side seal portions. 8. The pouch container according to claim 7, wherein the second reinforcing member is joined to the second main body sheet and the second interior sheet at both of the pair of side seal portions. [Appendix 9] A pouch container as described in Appendix 8, wherein both ends of the second reinforcing member and both side ends of the first main body sheet, the second main body sheet, the first interior sheet, and the second interior sheet are aligned with each other. [Appendix 10] 10. The pouch container according to any one of claims 7 to 9, further comprising a second easily-folded portion in which the thickness of the second reinforcing member is partially reduced. [Appendix 11] 11. The pouch container according to any one of claims 7 to 10, further comprising a second intermediate outer seal portion where the second main body sheet and the second reinforcing member are joined. [Appendix 12] 12. The pouch container according to any one of claims 7 to 11, wherein the first reinforcing member and the second reinforcing member are arranged so as to be offset from each other in the vertical direction. [Explanation of symbols]

[0126] A1,A11,A12,A13,A14,A15,A2,A21,A3,A31,A32,A4,A41,A42,A43,A5,A6,A7,A8: Pouch container 1A: First body sheet 1B: Second body sheet 2A: First interior seat 2B: Second interior seat 3A: First reinforcing member 3B: Second reinforcing member 31A: Normal width part 31B: Normal width part 32A: Wide section 32B: Wide section 33A: Transition part 33B: Transition part 41: Bottom seal 42: Side seal part 43: Injection seal part 44A: First upper seal part (first upper fixing part) 44B: Second upper seal part (second upper fixed part) 45A: First lower seal part 45B: Second lower seal part 46A: First intermediate outer seal part 46B: Second intermediate outer seal part 47A: First intermediate inner seal part 47B: Second intermediate inner seal part 51: Storage unit 52: Opening 53: Zipper 54: Pour part 61A: First folded part 61B: Second folded part 71A: First easy-to-bend portion 71B: Second easy-to-fold portion 80: Tube 82: Flow path equipment 84: Sealed case 90: Pouch container products 421: Inner edge 423: Curved section S1: Sealing mold

Claims

1. A pouch container for enteral nutrition, having a storage section that opens upward between the overlapping surfaces of a pair of main sheets, In the upward opening of the aforementioned housing section, a reinforcing member is provided on at least one of the main sheets so as to extend in the width direction of the sheet, having greater deformation rigidity than the main sheet and capable of holding the main sheet in a curved shape. Both ends of the reinforcing member extend to a pair of lateral sealing portions to which the widthwise edges of the pair of main sheets are joined, and are fixed at the lateral sealing portions, A pouch container for enteral nutrition, wherein the vertical height dimension of both ends of the reinforcing member is a wide portion that is larger than the vertical height dimension of the normal width portion located between a pair of lateral sealing portions in the reinforcing member.

2. The opening portion is a wide portion with a longer width at the top, while the lower portion is a narrow portion with a shorter width at the bottom compared to the top. A pouch container for enteral nutrition according to claim 1, wherein a zipper for sealing the storage portion is provided in the narrow portion, and the reinforcing member is provided in the wide portion.

3. The pouch container for enteral nutrition according to Claim 2, wherein the pressing operation part for applying the operating force to open the opening is located below the reinforcing member and is positioned to overlap with the chuck in the width direction.

4. The pouch container for enteral nutrition according to claim 2 or 3, wherein the reinforcing member has greater deformation rigidity than the chuck.

5. The pouch container for enteral nutrition according to any one of claims 1 to 4, wherein the pair of main sheets are pre-shaped to open apart from each other at the opening where the reinforcing member is provided.

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