CA3080892A1

CA3080892A1 - Flexible container

Info

Publication number: CA3080892A1
Application number: CA3080892A
Authority: CA
Inventors: Nobumasa Shiraishi; Kazushi TAKEMOTO; Tomohiro Matsuo
Original assignee: Sumitomo Seika Chemicals Co Ltd; Hagiwara Industries Inc
Current assignee: Sumitomo Seika Chemicals Co Ltd
Priority date: 2017-11-01
Filing date: 2018-10-25
Publication date: 2019-05-09
Also published as: TWI741224B; WO2019087908A1; KR20200075842A; TW201922593A; EP3705421A1; KR102649842B1; SG11202003844YA; US20210155402A1; JP7330105B2; BR112020008723A2; JPWO2019087908A1; CN111247073B; CN111247073A; EP3705421A4; PH12020550492A1

Abstract

Provided is an easily openable flexible container. This container is provided with an outer bag, an inner bag, a first binder, and a cover, and contains contents. The outer bag has a bottom surface section having a lower opening formed therein. The inner bag is housed within the outer bag, is cylindrically shaped so as to receive contents therein, and has a discharge opening section. The discharge opening section has formed therein a discharge passage for discharging the contents and extends to below the bottom surface section through the lower opening. The first binder binds the discharge opening section so as to close the discharge passage. The cover closes the lower opening and is mounted outside the bottom surface section so as to cover the discharge opening section. The discharge opening section is narrowed so as to close the discharge passage. The first binder binds the discharge opening section so that the discharge opening section is kept narrowed. The cover is mounted outside the bottom surface section so as to cover the discharge opening section bound by the first binder.

Description

DESCRIPTION
FLEXIBLE CONTAINER
Technical Field [0001] The present invention relates to a flexible container and a method for manufacturing the flexible container.
Background Art

[0002] Flexible containers are often used to store and transport various kinds of contents such as powder and granular materials, grain, vegetables, etc. There are various types of flexible containers, one of which is a flexible container in which a filling port for the contents is formed in an upper portion and a discharge port for the contents is formed in a lower portion (see Patent Literatures 1 to 3).
Flexible containers of this type are opened while suspended, and the contents are let out from the discharge port formed in the lower portion.

[0003] Flexible containers described in Patent Literatures 1 to 3 have a double structure and include an inner bag to be filled with the contents and an outer bag that houses the inner bag. A lower opening is formed in a bottom surface portion of the outer bag, and except for when the lower opening is open, the lower opening is covered by a corolla-shaped lid that is continuous to an edge defining the lower opening in the bottom surface portion. Note that the corolla-shaped lid is called a lower side outer lid" (16) in Patent Literature 1, lid holding pieces" (16a to 16d) in Patent Literature 2, and a -chrysanthemum split portion" (18) in Patent Literature 3. The corolla-shaped lid is constituted by portions corresponding to a plurality of petals, and as a result of a piece of cord that is passed through centers of these portions being tied off, these portions are radially arranged in a corolla-like shape, in the same plane as the bottom surface portion, and thus the lower opening is closed. On the other hand, when the Date Recue/Date Received 2020-04-29 lower opening is to be opened, the piece of cord is untied, whereby the portions corresponding to petals hang down and the lower opening is opened. Then, the contents are let out via a discharge port portion that corresponds to a lower portion of the inner bag that is drawn out from the lower opening.
Citation List Patent Literature

[0004] Patent Literature 1: JP 3191096U
Patent Literature 2: JP 2004-26202A
Patent Literature 3: JP 2016-33022A
Summary of Invention Technical Problem

[0005] When the above-described flexible container is to be opened, it is necessary to perform operations such as opening the corolla-shaped lid by untying the piece of cord fixing the lid, drawing out the discharge port portion of the inner bag, cutting a heat-sealed portion at the leading end of the discharge port portion, and untying a piece of cord that is tied around the discharge port portion, for example. However, the lower opening is formed in the bottom surface portion of the outer bag, and accordingly these opening operations are not always easy for a worker who is standing on a side of the flexible container to perform. Furthermore, in most cases, a flexible container holding contents is heavy and difficult to tilt, and the opening operations are particularly difficult in such cases.

[0006] An object of the present invention is to provide a flexible container that can be easily opened and a method for manufacturing the flexible container.
Solution to Problem Date Recue/Date Received 2020-04-29

[0007] A flexible container according to a first aspect is a flexible container for holding contents and includes an outer bag, an inner bag, a first binding member, and a lid. The outer bag includes a bottom surface portion in which a lower opening is formed. The inner bag is a tubular inner bag that is housed in the outer bag, configured to be filled with the contents, and includes a discharge port portion. The discharge port portion forms a discharge path for discharging the contents and extends to a lower side of the bottom surface portion via the lower opening. The first binding member is configured to be tied around the discharge port portion to close the discharge path. The lid is configured to be attached to an outer side of the bottom surface portion to cover the discharge port portion. The discharge port portion is narrowed to close the discharge path. The first binding member is tied around the discharge port portion to maintain a state in which the discharge port portion is narrowed.
The lid is attached to the outer side of the bottom surface portion to cover the discharge port portion tied off with the first binding member.

[0008] A flexible container according to a second aspect is the flexible container according to the first aspect, wherein the discharge port portion is narrowed to close the discharge path and then folded back in one direction, or is folded back in one direction to close the discharge path and then narrowed. The first binding member is tied around the discharge port portion to maintain a state in which the discharge port portion is folded back in one direction and narrowed. The lid is attached to the outer side of the bottom surface portion to cover the discharge port portion that is folded after being tied off with the first binding member.

[0009] A flexible container according to a third aspect is the flexible container according to the first or second aspect that is configured such that the discharge port portion in a state of being tied off with the first binding member hangs down from the bottom surface portion when the lid is removed from the bottom surface portion.

[0010] A flexible container according to a fourth aspect is the flexible container Date Recue/Date Received 2020-04-29 according to any one of the first to third aspects, wherein the lid is configured to be attached to the bottom surface portion using a hook-and-loop fastener.

[0011] A flexible container according to a fifth aspect is the flexible container according to any one of the first to fourth aspects, wherein the first binding member is a cord-shaped member that includes a hook-and-loop fastener.

[0012] A flexible container according to a sixth aspect is the flexible container according to any one of the first to fifth aspects, wherein the outer bag further includes a discharge port cover that surrounds the discharge port portion. The discharge port cover is fixed to the bottom surface portion to extend to the lower side of the bottom surface portion from the lower opening. The first binding member is fixed to the discharge port cover.

[0013] A flexible container according to a seventh aspect is the flexible container according to any one of the first to sixth aspects, wherein the outer bag further includes an upper surface portion in which an upper opening is formed. The inner bag further includes a filling port portion that forms an introduction path for introducing the contents and extends to an upper side of the upper surface portion via the upper opening.

[0014] A flexible container according to an eighth aspect is the flexible container according to the seventh aspect that further includes a second binding member configured to be tied around the filling port portion to close the introduction path.

[0015] A flexible container according to a ninth aspect is the flexible container according to the eighth aspect, wherein the outer bag further includes a filling port cover that surrounds the filling port portion. The filling port cover is fixed to the upper surface portion to extend to the upper side of the upper surface portion from the upper opening. The second binding member is fixed to the filling port cover.

[0016] A flexible container according to a tenth aspect is the flexible container according to the eighth or ninth aspect that further includes a hooking member that is Date Recue/Date Received 2020-04-29 fixed to the second binding member or a portion in the vicinity of the center of an upper portion of the outer bag and can be hooked to a suspending tool that suspends the flexible container from above.

[0017] A flexible container according to an eleventh aspect is the flexible container according to any one of the first to tenth aspects, wherein the contents are water-absorbent resin particles.

[0018] A manufacturing method according to a twelfth aspect is a manufacturing method for manufacturing a flexible container for holding contents and includes the following steps:
=providing an outer bag that includes a bottom surface portion in which a lower opening is formed;
=providing a tubular inner bag that is configured to be filled with the contents and includes a discharge port portion that forms a discharge path for discharging the contents;
=housing the inner bag in the outer bag such that the discharge port portion extends to a lower side of the bottom surface portion via the lower opening;
narrowing the discharge port portion to close the discharge path;
=tying off the discharge port portion using a first binding member to maintain a state in which the discharge port portion is narrowed; and attaching a lid to an outer side of the bottom surface portion to cover the discharge port portion tied off with the first binding member.

[0019] A manufacturing method according to a thirteenth aspect is the manufacturing method according to the twelfth aspect, wherein the outer bag further includes an upper surface portion in which an upper opening is formed. The inner bag includes a filling port portion that forms an introduction path for introducing the contents.
Housing the inner bag in the outer bag includes housing the inner bag in the outer bag such that the filling port portion extends to an upper side of the upper surface portion via the upper Date Recue/Date Received 2020-04-29 opening.

[0020] A manufacturing method according to a fourteenth aspect is a manufacturing method for manufacturing a flexible container holding contents therein and includes the following steps:
.manufacturing the flexible container using the manufacturing method according to the thirteenth aspect;
=introducing the contents into the inner bag via the introduction path of the flexible container; and =closing the introduction path after the contents are introduced.

[0021] An opening method according to a fifteenth aspect is a method for opening a flexible container holding contents therein and includes the following steps:
=manufacturing the flexible container holding the contents therein using the manufacturing method according to the fourteenth aspect;
=suspending the flexible container holding the contents therein;
removing the lid from the bottom surface portion to cause the discharge port portion tied off with the first binding member to hang down from the bottom surface portion;
and =opening the discharge path by untying the first binding member from the hanging discharge port portion.
Advantageous Effects of Invention

[0022] According to the present invention, the discharge port portion of the inner bag extending from the bottom surface portion of the outer bag is covered by the lid attached to the outer side of the bottom surface portion. Therefore, it is easy for a worker to remove the lid while stretching out their hand from a side of the flexible container to its underside when opening the flexible container. Also, the worker can open the discharge port portion of the inner bag by untying the first binding member Date Recue/Date Received 2020-04-29 tied around the discharge port portion, while stretching out their hand from the side.
Therefore, the worker need not necessarily have to perform operations for opening the discharge port portion while standing under the flexible container, and can open the discharge port portion even while standing on a side of the flexible container.
Accordingly, the flexible container can be easily opened.

[0023] Furthermore, according to the above-described second aspect, except for when the discharge port portion of the inner bag is opened, the discharge port portion is folded back in one direction and then narrowed (or narrowed and then folded back) and tied off with the first binding member to maintain this state, and the tied discharge port portion is folded and covered by the lid. The discharge port portion of the inner bag is located in the vicinity of the lowest end portions of the inner bag and the outer bag and likely to largely move to the left and the right (i.e., likely to sway) and interfere with the lid when the flexible container is carried while suspended. If the discharge port portion and the lid excessively interfere with each other, there is a risk that the lid will be .. unintentionally opened. However, according to the above-described second aspect, the discharge port portion is tied off with the first binding member in the folded state except for when it is opened, and accordingly the position of the lowest end of the discharge port portion is slightly raised, and the discharge port portion is unlikely to interfere with the lid. Therefore, the lid is prevented from being unintentionally opened even if the discharge port portion covered by the lid sways when the flexible container is carried.
Brief Description of Drawings

[0024] FIG. 1 is a side view showing a state in which a flexible container according to one embodiment of the present invention is spread out;
FIG. 2 is a diagram showing a state in which a discharge port is folded back and fixed using a binding member;
FIG. 3 is a bottom view of the flexible container in a state in which a lid is Date Recue/Date Received 2020-04-29 attached;
FIG. 4 is a bottom view of the flexible container in a state in which the lid is about half-removed;
FIG. 5 is a plan view of an outer bag in a state in which a corolla-shaped lid is closed;
FIG. 6 is a partial cross-sectional view showing a state in which the flexible container is suspended from above using a suspending tool;
FIG. 7 is a partial cross-sectional view showing a state in which the flexible container is suspended from above using the suspending tool without a hooking member of a filling port being hooked to the suspending tool;
FIG. 8 is a diagram showing a binding member according to a variation; and FIG. 9 is a diagram showing a method for binding the discharge port according to a variation.
Description of Embodiments

[0025] The following describes a flexible container according to one embodiment of the present invention with reference to the drawings.
1. Overall Configuration of Flexible Container

[0026] FIG. 1 shows a side view of a flexible container (hereinafter may simply be referred to as a -container") 1 (from which a lid 5 described later is omitted) according to the present embodiment. The flexible container 1 is a container for holding contents and is used to store and transport the contents. The flexible container 1 is constituted by a soft material as indicated by its name. Therefore, the container 1 spreads out three-dimensionally in a state of being filled with contents, but can be folded to be planar in an empty state. Although an upper portion and a lower portion of the flexible container 1 are folded into desired shapes in a predetermined manner described below, Date Recue/Date Received 2020-04-29 FIG. 1 shows a state in which the upper portion and the lower portion of the container 1 are spread out. The type of contents to be held in the container 1 is not specifically limited, and typical examples of the contents include powder and granular materials, grain, vegetables, etc., and the contents in the present embodiment are water-absorbent resin particles (pellets).

[0027] The flexible container 1 has a double structure and includes an outer bag 2 and an inner bag 3 that is housed in the outer bag 2 (see FIG. 6). The contents are held in the inner bag 3. The outer bag 2 includes a main body portion 20 that includes an upper surface portion 21, a bottom surface portion 22, and a side surface portion 23.
In the present embodiment, the upper surface portion 21 and the bottom surface portion 22 have a square shape. Namely, the main body portion 20 of the outer bag 2 has a substantially rectangular parallelepiped shape, and the side surface portion 23 includes four rectangular side surface portions. A pocket 23a for inserting a label etc., is attached to the side surface portion 23. An opening (hereinafter referred to as an '`upper opening") 21a is formed at the center of the upper surface portion 21.
Similarly, an opening (hereinafter referred to as a 'lower opening") 22a is formed at the center of the bottom surface portion 22. The openings 21a and 22a are both circular in the present embodiment. Note that positions of the openings 21a and 22a are indicated by shading in the side view shown in FIG. 1 for reference, although the openings 21a and 22a are otherwise not visible in this side view. The main body portion 20, the upper surface portion 21, the bottom surface portion 22, and the openings 21a and 22a are coaxially arranged and have a common central axis, which will be denoted by a reference numeral Al in the following description.

[0028] The inner bag 3 has a tubular shape. An upper portion of the inner bag extends to the upper side of the upper surface portion 21 via the upper opening 21a and forms a filling port portion 31 for the contents. A lower portion of the inner bag 3 extends to the lower side of the bottom surface portion 22 via the lower opening 22a Date Recue/Date Received 2020-04-29 and forms a discharge port portion 32 for the contents. The contents are introduced into the inner bag 3 via the filling port portion 31 and discharged from the inner bag 3 via the discharge port portion 32. Namely, the filling port portion 31 forms an introduction path R1 for introducing the contents into the inner bag 3, and the discharge port portion 32 forms a discharge path R2 for discharging the contents from the inner bag 3.

[0029] The outer bag 2 further includes a tubular filling port cover 25 that extends to the upper side of the upper surface portion 21 from the upper opening 21a and a tubular discharge port cover 26 that extends to the lower side from the lower opening 22a.
The filling port cover 25 covers the outer side of the filling port portion 31 of the inner bag 3 protruding from the upper surface portion 21 via the upper opening 21a, and the discharge port cover 26 covers the outer side of the discharge port portion 32 of the inner bag 3 protruding from the bottom surface portion 22 via the lower opening 22a.
The filling port cover 25 is fixed to the upper surface portion 21 through sewing etc., and arranged to protrude from the vicinity of an edge that defines the upper opening 21a.
The filling port cover 25 has a circular cross section that has substantially the same size as the upper opening 21a. Similarly, the discharge port cover 26 is fixed to the bottom surface portion 22 through sewing etc., and arranged to protrude from the vicinity of an edge that defines the lower opening 22a. The discharge port cover 26 has a circular cross section that has substantially the same size as the lower opening 22a.

[0030] The main body portion 20 of the outer bag 2 has a larger diameter than the filling port cover 25 and the discharge port cover 26. The diameter of the inner bag 3 is constant in the direction of the central axis Al and larger than diameters of the filling port cover 25 and the discharge port cover 26. Accordingly, when the inner bag 3 is housed in the outer bag 2, creases are formed in the upper portion (filling port portion

31) of the inner bag 3 and the diameter of the upper portion is reduced.
Similarly, when the inner bag 3 is housed in the outer bag 2, creases are formed in the lower Date Recue/Date Received 2020-04-29 portion (discharge port portion 32) of the inner bag 3 and the diameter of the lower portion is reduced. As described above, the filling port portion 31 forms a filling port together with the filling port cover 25, and accordingly the filling port portion 31 and the filling port cover 25 may be collectively referred to as a 'filling port P1" in the following description. Similarly, the discharge port portion 32 forms a discharge port together with the discharge port cover 26, and accordingly the discharge port portion 32 and the discharge port cover 26 may be collectively referred to as a -discharge port P2"
in the following description.
1-1. Configuration of Vicinity of Discharge Port [0031] Next, the configuration of the vicinity of the discharge port P2 will be described. The discharge port P2 is tied off using a binding member 40 (first binding member) to close the discharge path R2. In the present embodiment, the binding member 40 is fixed to an outer surface of the discharge port cover 26 as shown in FIG.
1. The binding member 40 is a cord-shaped member (hereinafter referred to as a -cord") 41 that includes hook-and-loop fasteners 42 and 43. The cord 41 is attached to the vicinity of the center of the discharge port cover 26 in the up-down direction through sewing etc., such that the cord 41 horizontally extends in a state of not being tied around the discharge port P2. The hook-and-loop fasteners 42 and 43 are .. configured to be fixed to each other and are arranged with a space therebetween in a longitudinal direction of the cord 41. Note that the position of the hook-and-loop fastener 43 is indicated for reference in FIGS. 1 and 2, although the hook-and-loop fastener 43 is arranged on the opposite side of the cord 41 and is otherwise not visible in these drawings.

[0032] When the discharge path R2 is to be closed, first, the discharge port portion 32 is narrowed together with the discharge port cover 26 covering the discharge port portion 32, to close the discharge path R2. Thereafter, as shown in FIG. 2, the Date Recue/Date Received 2020-04-29 discharge port portion 32 is folded back in one direction together with the discharge port cover 26, and the discharge port P2 is tied off using the binding member 40 to maintain the folded state. FIG. 2 shows a state in which the discharge port P2 is folded back and fixed using the binding member 40. At this time, the discharge port P2 is folded such that its lower end is oriented upward, and the cord 41 is wound around mutually facing portions of the folded discharge port P2. Then, the wound state of the cord 41 is fixed using the hook-and-loop fasteners 42 and 43 fixed to the cord 41.

[0033] FIGS. 3 and 4 are bottom views of the flexible container 1. As shown in these drawings, the flexible container 1 includes a lid 5 that is attached to the bottom surface portion 22 in a detachable manner to open or close the lower opening 22a. The lid 5 is attached to the outer side of the bottom surface portion 22 when the lower opening 22a is closed. The lid 5 has a sheet-like shape, and is rectangular in the present embodiment. Hook-and-loop fasteners 51 are fixed to an inner surface 5a of the lid 5 that faces the bottom surface portion 22, through sewing etc., at substantially constant intervals along an outer peripheral portion. On the other hand, hook-and-loop fasteners 52 are fixed through sewing etc., to portions of the bottom surface portion 22 that face the hook-and-loop fasteners 51. As a result of these hook-and-loop fasteners 51 and 52 being fixed to each other, the lid 5 is attached to the bottom surface portion 22. Note that positions of the hook-and-loop fasteners 51 are indicated for reference in FIGS. 3 and 4, although the hook-and-loop fasteners 51 are attached to the inner surface of the lid 5 and are not visible from the outside.

[0034] When the lid 5 is attached to the bottom surface portion 22, the entirety of the discharge port P2 is covered by the lid 5 such that the discharge port P2 cannot be seen from the outside. More specifically, the discharge port P2 is folded after being tied off with the binding member 40, and the lid 5 is attached to the bottom surface portion 22 to cover the folded discharge port P2. At this time, the discharge port P2 is housed between the lid 5 and the bottom surface portion 22. FIG. 4 is a bottom view of the Date Recue/Date Received 2020-04-29 flexible container 1 in a state in which the lid 5 is about half-removed. As shown in FIG. 4, when the lid 5 is removed from the bottom surface portion 22, the discharge port P2 tied off with the binding member 40 is exposed from the bottom surface portion 22.
At this time, the discharge port P2 hangs down under gravity and enters the state shown .. in FIG. 2 when viewed from a side.
1-2. Configuration of Vicinity of Filling Port

[0035] Next, the structure of the vicinity of the filling port P1 will be described. The filling port P1 is tied off using a binding member 45 (second binding member) to close the introduction path Rl. In the present embodiment, the binding member 45 is fixed to an outer surface of the filling port cover 25 as shown in FIG. 1. The binding member 45 is a cord-shaped member. The binding member 45 is attached to the vicinity of the center of the filling port cover 25 in the up-down direction through sewing etc., such that the binding member 45 horizontally extends in a state of not being tied around the filling port P1.

[0036] When the introduction path R1 is to be closed, first, the filling port portion 31 is narrowed together with the filling port cover 25 covering the filling port portion 31, to close the introduction path Rl. Thereafter, the binding member 45 is wound around the filling port P1 to maintain the narrowed state. At this time, the binding member 45 .. is tied into a bow etc., for example. More specifically, a configuration may be employed in which the filling port cover 25 and the filling port portion 31 are tied together with a half-knot, thereafter the filling port portion 31 protruding from the filling port cover 25 is folded back in one direction such that the leading end of the filling port portion 31 is oriented downward, and then the folded portion of the filling port portion 31 and the filling port cover 25 are tied together with a bowknot.

[0037] The outer bag 2 includes a corolla-shaped lid (hereinafter referred to as a -corolla lid") 24 for opening and closing the upper opening 21a. FIG. 5 is a plan view Date Recue/Date Received 2020-04-29

Claims

1. A flexible container for holding contents, comprising:
an outer bag that includes a bottom surface portion in which a lower opening is formed;
a tubular inner bag that is housed in the outer bag, configured to be filled with the contents, and includes a discharge port portion that forms a discharge path for discharging the contents and extends to a lower side of the bottom surface portion via the lower opening;
a first binding member configured to be tied around the discharge port portion to close the discharge path; and a lid configured to be attached to an outer side of the bottom surface portion to cover the discharge port portion, wherein the discharge port portion is configured to be narrowed to close the discharge path, the first binding member is configured to be tied around the discharge port portion to maintain a state in which the discharge port portion is narrowed, and the lid is configured to be attached to the outer side of the bottom surface portion to cover the discharge port portion tied off with the first binding member.

2. The flexible container according to claim 1, wherein the discharge port portion is configured to be narrowed to close the discharge path and then folded back in one direction, or is configured to be folded back in one direction to close the discharge path and then narrowed, the first binding member is configured to be tied around the discharge port portion to maintain a state in which the discharge port portion is folded back in one direction and narrowed, and the lid is configured to be attached to the outer side of the bottom surface portion to cover the discharge port portion that is folded after being tied off with the first binding member.

3. The flexible container according to claim 1 or 2, wherein the flexible container is configured such that the discharge port portion in a state of being tied off with the first binding member hangs down from the bottom surface portion when the lid is removed from the bottom surface portion.

4. The flexible container according to any one of claims 1 to 3, wherein the lid is configured to be attached to the bottom surface portion using a hook-and-loop fastener.

5. The flexible container according to any one of claims 1 to 4, wherein the first binding member is a cord-shaped member that includes a hook-and-loop fastener.

6. The flexible container according to any one of claims 1 to 5, wherein the outer bag further includes a discharge port cover that surrounds the discharge port portion, the discharge port cover is fixed to the bottom surface portion to extend to the lower side of the bottom surface portion from the lower opening, and the first binding member is fixed to the discharge port cover.

7. The flexible container according to any one of claims 1 to 6, wherein the outer bag further includes an upper surface portion in which an upper opening is formed, and the inner bag further includes a filling port portion that forms an introduction path for introducing the contents and extends to an upper side of the upper surface portion via the upper opening.

8. The flexible container according to claim 7, further comprising a second binding member configured to be tied around the filling port portion to close the introduction path.

9. The flexible container according to claim 8, wherein the outer bag further includes a filling port cover that surrounds the filling port portion, the filling port cover is fixed to the upper surface portion to extend to the upper side of the upper surface portion from the upper opening, and the second binding member is fixed to the filling port cover.

10. The flexible container according to claim 8 or 9, further comprising a hooking member that is fixed to the second binding member or a portion in the vicinity of the center of an upper portion of the outer bag and is configured to be hooked to a suspending tool that suspends the flexible container from above.

11. The flexible container according to any one of claims 1 to 10, wherein the contents are water-absorbent resin particles.

12. A manufacturing method for manufacturing a flexible container for holding contents, comprising:
providing an outer bag that includes a bottom surface portion in which a lower opening is formed;

providing a tubular inner bag that is configured to be filled with the contents and includes a discharge port portion that forms a discharge path for discharging the contents;
housing the inner bag in the outer bag such that the discharge port portion extends to a lower side of the bottom surface portion via the lower opening;
narrowing the discharge port portion to close the discharge path;
tying off the discharge port portion using a first binding member to maintain a state in which the discharge port portion is narrowed; and attaching a lid to an outer side of the bottom surface portion to cover the discharge port portion tied off with the first binding member.

13. The manufacturing method according to claim 12, wherein the outer bag further includes an upper surface portion in which an upper opening is formed, the inner bag includes a filling port portion that forms an introduction path for introducing the contents, and housing the inner bag in the outer bag includes housing the inner bag in the outer bag such that the filling port portion extends to an upper side of the upper surface portion via the upper opening.

14. A manufacturing method for manufacturing a flexible container holding contents therein, comprising:
manufacturing the flexible container using the manufacturing method according to claim 13;
introducing the contents into the inner bag via the introduction path of the flexible container; and closing the introduction path after the contents are introduced.

15. A method for opening a flexible container holding contents therein, comprising:
manufacturing the flexible container holding the contents therein using the manufacturing method according to claim 14;
suspending the flexible container holding the contents therein;
removing the lid from the bottom surface portion to cause the discharge port portion tied off with the first binding member to hang down from the bottom surface portion; and opening the discharge path by untying the first binding member from the hanging discharge port portion.