JP6665342B1 - Flexible container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible container capable of discharging static electricity by connecting an outer bag in which a conductive material is incorporated and an inner bag having a non-conductive layer / a conductive layer / a non-conductive layer. A flexible container according to the present invention is formed of a sheet for an outer bag in which a conductive material is incorporated in a non-conductive plastic substrate, and an outer bag capable of discharging static electricity by the conductive material. An inner bag formed of a sheet for an inner bag having a non-conductive layer / a conductive layer / a non-conductive layer, a conductive material for the outer bag sheet, and a conductive layer for the inner bag sheet And a connecting member for electrically connecting, the inner bag sheet has an exposed portion capable of exposing the surface of the conductive layer, the connecting member, in the exposed portion. It is electrically connected to the exposed surface of the conductive layer. [Selection diagram] Fig. 1

Description

  The present invention relates to a flexible container capable of preventing ignitable discharge due to static electricity.

  The contents of flexible containers range from petrochemical raw materials, minerals, minerals, fertilizers, feed, food, etc., and due to the nature and shape of the contents, a prescription that does not change during transportation or storage as packaging materials is required. Can be

  However, particularly when the content is a granular material, static electricity due to friction is likely to be generated at the time of filling and discharging. In that case, since the charged voltage may increase due to the large capacity of the flexible container, which may lead to ignitable discharge, it is necessary to prevent this. Therefore, there has been known a flexible container in which a conductive material is incorporated in a bag body in advance, the conductive material is grounded, and static electricity is released to prevent ignitable discharge. Such a flexible container is called “type C”, and a product standard is defined in IEC 61340-4-4 (JIS C 61340-4-4).

  On the other hand, a flexible container having a double structure including an outer bag and an inner bag contained in the outer bag is known from the viewpoint of preventing foreign substances from being mixed and improving gas barrier properties and moisture resistance. In the case where the above-mentioned "Type C" flexible container has a double structure and includes a conductive layer in the inner bag, it is necessary to electrically connect the conductive material of the outer bag and the inner bag and then ground the ground. However, if the electrical connection between the outer bag and the inner bag is imperfect, static electricity will accumulate there and the connection must be perfect.

  Patent Literature 1 discloses an outer bag formed of a uniaxially stretched thermoplastic resin filament, formed of a cloth-like body provided with a conductive filament in a bag shape, and a conductive synthetic resin. An inner layer body attached to the inner surface of the bag, a lower part of the outer bag is formed with a closable opening, and a suspending belt provided with a conductive wire body on the upper part is continuously provided, and A flexible container is described in which the conductive wire and the conductive wire of the hanging belt are electrically joined and the outer bag and the hanging portion of the hanging belt are electrically connected. .

  Patent Literature 2 discloses that a polymerizable hygroscopic powder having a CRH of 60% or less and a water content of 2000 ppm or less is filled, a top portion having a filling port, a bottom portion having a discharge port, at least four or more pieces. The polymerizable hygroscopic powder from a flexible container bag formed of an exterior portion having a side portion on which a suspension belt is sewn, and an inner bag portion formed of a sealing material inside the exterior portion. A method of discharging, wherein a hanging jig having lifting hooks at each protruding end of four or more axes extending radially from the center of the hanging jig is used to hang the hanging belt of the flexible container bag. Is suspended on the lifting hook, and the flexible container bag is lifted by the hanging belt so as to be supported at four or more fulcrums in the vertical direction and at the same load. Et al, the discharge method of the polymerizable hygroscopic powder, characterized by discharging the polymerizing hygroscopic powder from the outlet on the bottom portion of the flexible intermediate bulk container is described.

Patent Document 3 discloses a flexible container for accommodating a granular material having a minimum ignition energy of 3 mJ or less, which is made of a woven fabric having a striped or lattice-shaped conductive thread as a replacement thread or an additional thread. An outer bag connected to ground, having a bottom area of the powder-grain-containing portion of 0.15 to 7 m ² , a height of 0.25 to 3 m, and a ground resistance value of less than 1 × 10 ⁸ Ω; And a film containing carbon black, the bottom area of the powder and granular material accommodation portion is 0.15 to 7 m ² , the height is 0.25 to 3 m, and the surface resistivity is 1 × 10 ⁹ Ω to 1 × 10 ¹² Ω. And an inner bag that is a flexible container.

JP 2003-252397 A JP 2005-67625 A JP 2014-162514 A

  IEC 61340-4-4, which was revised in January 2018, specifies a specification for forming an inner bag using a multilayer film in which a conductive layer is sandwiched between insulating layers (non-conductive layers). However, when the thickness of the conductive layer in the multilayer film is small (for example, 10 μm or less), it is difficult to electrically connect to the conductive layer at the side end of the multilayer film. On the other hand, if it is a multilayer film having a conductive layer having a large thickness (for example, more than 10 μm), it is considered that it is possible to electrically connect to the conductive layer at the side end, but the flexibility of the multilayer film is reduced. However, it was difficult to handle it as an inner bag of a flexible container.

  Therefore, an object of the present invention is to provide a flexible container capable of releasing static electricity by connecting an outer bag incorporating a conductive material and an inner bag having a non-conductive layer / a conductive layer / a non-conductive layer. And

The present invention is formed by an outer bag sheet in which a conductive material is incorporated into a non-conductive plastic substrate, and an outer bag capable of releasing static electricity by the conductive material,
An inner bag formed of an inner bag sheet having a non-conductive layer / a conductive layer / a non-conductive layer, and an inner bag included in the outer bag;
A connection member that electrically connects the conductive material of the outer bag sheet and the conductive layer of the inner bag sheet,
The inner bag sheet has an exposed portion capable of exposing the surface of the conductive layer,
A flexible container , wherein the connection member is electrically connected to a surface of the conductive layer exposed at the exposed portion ,
[1] The inner bag is
In the middle portion, at least two inner bag sheets are formed in a tubular shape so that the sides of adjacent inner bag sheets are in contact with each other, and are formed by sealing along each side. It has a cylindrical shape,
In the upper part located above the middle part, the injection part formed by sealing along the side having an angle with respect to the vertical direction from the side of the adjacent inner bag sheet toward the upper side. Doing
In the upper portion, the exposed portion is provided in a region outside a side where the adjacent inner bag sheet is sealed; or
[2] The inner bag,
In the middle portion, at least two inner bag sheets are formed in a tubular shape such that the sides of adjacent inner bag sheets are in contact with each other, and are formed by sealing along each side. It has a cylindrical shape,
In the lower part located below the middle part of the inner bag, it is formed by sealing along the side having an angle with respect to the vertical direction from the side to the lower side of the adjacent inner bag sheet. The discharge section,
In the lower part, the adjacent inner bag sheet has the exposed portion in a region outside a side where the sheet is sealed.
It is a flexible container .

  According to the present invention, it is possible to provide a flexible container capable of discharging static electricity by connecting an outer bag incorporating a conductive material and an inner bag having a non-conductive layer / a conductive layer / a non-conductive layer. .

It is a perspective view showing the example of composition of the inner bag of the flexible container concerning the present invention. It is a perspective view which shows the example of a shape of the sheet for inner bags which comprises the inner bag of the flexible container which concerns on this invention. It is sectional drawing which shows the example of a connection of the conductive layer of the sheet for inner bags and the connection member which comprises the inner bag of the flexible container which concerns on this invention. It is a perspective view showing the example of composition of the outer bag of the flexible container concerning the present invention.

  The flexible container according to the present invention is an electrostatic-disaster-prevention flexible container called “Type C”, which has an outer bag capable of releasing static electricity and an inner bag contained in the outer bag. The outer bag is formed of an outer bag sheet in which a conductive material is incorporated in a non-conductive plastic base material. The inner bag is formed by an inner bag sheet having a non-conductive layer / a conductive layer / a non-conductive layer, and the inner bag sheet has an exposed portion capable of exposing the surface of the conductive layer. The conductive material of the outer bag sheet and the surface of the conductive layer exposed at the exposed portion of the inner bag sheet are electrically connected by a connection member. With a flexible container having such a configuration, the conductive material of the outer bag and the conductive layer of the inner bag are firmly connected, so by grounding the conductive material of the outer bag, The generated static electricity can be released, and igniting discharge due to the static electricity can be prevented.

<Outer bag>
FIG. 4 shows a configuration example of the outer bag of the flexible container according to the present invention. The outer bag 1 shown in FIG. 4 is formed by an outer bag sheet 10, and has a container body having a substantially rectangular cross-section opened up and down, an upper surface of the body closing an opened upper portion of the container body, and a container. And a lower surface of the main body for closing an opened lower portion of the main body.

  The container body is a tubular body made of a flexible material. The cylindrical body forming the container body may be seamless, or may be formed by winding one sheet material and joining the ends together to form a cylindrical shape. Alternatively, the sheet material may be formed in a tubular shape such that adjacent sides of the sheet material are in contact with each other, and each side is sealed. The container body may be a substantially cylindrical shape having a horizontal cross-sectional shape of a circle or an ellipse, or may be a substantially polygonal cylindrical shape having a horizontal cross-sectional shape of a polygon or a polygon with rounded corners. Examples of the polygon include a triangle having three corners, a quadrangle having four corners, a pentagon having five corners, and a hexagon having six corners. A quadrangle is preferable, and a rectangle or a square is more preferable.

  As a material of the cylindrical body (outer bag sheet 10) constituting the container body, a material in which a conductive material is incorporated in a non-conductive plastic base material can be used. For example, as a material used for a cross-shaped flexible container, a non-conductive flat yarn 11 made of a polyolefin resin such as polyethylene or polypropylene is used as a warp and a weft, and a part of the conductive yarn 12 is formed into a stripe shape. Yarn fabrics obtained by weaving at equal intervals are exemplified. Examples of the conductive thread 12 include a metal fiber, a metal plated fiber, an organic conductive fiber, and a fiber obtained by mixing or attaching a conductive substance such as carbon black. The woven conductive filaments 12 are preferably arranged so as to be in contact with each other, and are preferably grounded to a ground or the like from a ground terminal (not shown) connected to the conductive filaments 12.

  The opened upper part of the container body is closed by the upper surface of the body. That is, the outer periphery of the upper surface of the main body is formed substantially the same as the outer periphery of the upper portion of the container main body, and the outer periphery of the upper surface of the main body is connected to the outer periphery of the upper portion of the container main body. The type of connection can be appropriately set in consideration of the ease and strength of the flexible container. For example, a separately formed container main body and the upper surface of the main body can be connected by sewing, bonding, fusion, or the like. Further, as will be described later, when the upper surface of the main body is a cylindrical body having substantially the same cross-sectional shape as the container main body, the container main body and the upper surface of the main body can be integrally formed. Specific examples of the material forming the upper surface of the main body include the materials exemplified as the material forming the main body of the container, but are preferably the same as the material forming the main body of the container.

  An inlet 1a is formed on the upper surface of the main body to allow communication between the inside and the outside of the container main body. That is, the material stored inside the container body can be injected from the injection port 1a, and the material stored inside the container body can be taken out. As a method of taking out the material stored inside the container main body, a method of sucking from above or a method of turning the flexible container upside down may be mentioned. The shape and size of the inlet 1a can be appropriately set in consideration of the design filling amount of the flexible container 1 and the like. For example, the upper surface of the main body may be a cylindrical body having substantially the same cross-sectional shape as that of the container main body, and the opened upper portion of the container main body may be closed by folding the upper surface of the main body. The structure and the like of the upper surface of the main body are not particularly limited, but from the viewpoint of effectively utilizing the space, it is preferable that the upper surface of the main body be flat when the injection port 1a is closed.

  The opened lower part of the container main body is closed by the lower surface of the main body. That is, the outer periphery of the lower surface of the main body is formed substantially the same as the outer periphery of the lower portion of the container main body, and the outer periphery of the lower surface of the main body is connected to the outer periphery of the upper portion of the container main body. The type of connection can be appropriately set in consideration of the ease and strength of the flexible container. For example, a separately formed container body and the lower surface of the body can be connected by sewing, bonding, fusion, or the like. Further, as will be described later, when the lower surface of the main body is a cylindrical body having substantially the same cross-sectional shape as the container main body, the container main body and the lower surface of the main body may be integrally formed. Specific examples of the material forming the lower surface of the main body include the materials exemplified as the material forming the main body of the container, but are preferably the same as the material forming the main body of the container.

  Depending on the use of the flexible container, a discharge port 1b for communicating the inside and outside of the container body can be formed on the lower surface of the body. In this case, the material stored inside the container body can be discharged from the discharge port 1b. The shape and size of the discharge port 1b can be appropriately set in consideration of the design filling amount of the flexible container and the like. For example, the lower surface of the main body may be a cylindrical body having substantially the same cross-sectional shape as the container main body, and the lower surface of the main body may be folded to close the opened lower part of the container main body. The structure of the lower surface of the main body is not particularly limited, but it is preferable that the lower surface of the main body be flat when the discharge port 1b is closed, from the viewpoint of effectively utilizing the space.

<Inner bag>
FIG. 1 shows a configuration example of the inner bag of the flexible container according to the present invention, and FIG. 2 shows the shape of the inner bag sheet constituting the inner bag of FIG. The inner bag 2 shown in FIG. 1 is formed by combining four inner bag sheets 20.

The inner bag sheet 20 may have a structure in which a conductive layer is sandwiched between non-conductive layers, that is, at least a non-conductive layer / a conductive layer / a non-conductive layer. Each layer may be one layer or two or more layers. A functional layer having adhesiveness, sealing properties, gas barrier properties and the like may be used. Examples of the material for forming the non-conductive layer include polyolefin resins such as polyethylene and polypropylene, ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), and polyethylene terephthalate. Examples of a material for forming the conductive layer include a metal such as aluminum, and a resin in which a conductive material such as a metal and carbon black is mixed. The surface resistivity of the conductive layer is preferably 1.0 × 10 ⁸ Ω or less. Examples of the laminating method include coating, laminating, and co-extrusion.

  As an example of the inner bag sheet 20, as shown in FIG. 3, two sheets of a laminated sheet 21 in which a metal deposition layer to be a conductive layer 21 b is formed on one surface of a non-conductive layer 21 a, Examples include those formed by overlapping one another so as to face each other. As the laminated sheet 21, a laminated sheet 21 in which an aluminum vapor-deposited layer serving as the conductive layer 21b is formed on one surface of a polyethylene terephthalate sheet serving as the non-conductive layer 21a can be used. Further, in order to connect adjacent inner bag sheets 20 by heat sealing and connecting them, it is preferable to have a seal layer 22 as an innermost layer which is an inner surface of the inner bag 2.

  The inner bag sheet 20 forming the inner bag 2 may be a seamless tubular member or a flat sheet. In the case of a flat sheet, for example, at least two inner bag sheets 20 are arranged in a tubular shape so that the sides of the adjacent inner bag sheets 20 are in contact with each other, and the inner bag 2 is appropriately sealed to seal the inner bag 2. Can be formed. The number of the inner bag sheets 20 forming the inner bag 2 is one in the case of seamlessness, and may be one in the case of forming the inner bag 2 by connecting flat sheets together. More than one sheet is preferred. In particular, since a flexible container in which the outer bag 1 has a substantially square cross section is generally used, the inner bag 2 is formed by connecting four inner bag sheets 20 as shown in FIG. Is more preferred.

  In the middle section 20b of the inner bag 2 shown in FIG. 1, the four inner bag sheets 20 are arranged in a tubular shape such that the sides of the adjacent inner bag sheets 20 are in contact with each other, and are along each side. A cylindrical body formed by sealing with the seal portion 23 is formed. In the upper portion 20a located above the middle portion 20b, the seal portion 23 along the side (side inward) having an angle with respect to the vertical direction from the side to the upper side of the adjacent inner bag sheet 20 is formed. To form an injection part formed by sealing. An injection port 2a is formed at the center of the upper side of the injection section. In the lower portion 20c located below the middle portion 20b, the seal portion 23 along the side (side inward) having an angle with respect to the vertical direction from the side to the lower side of the adjacent inner bag sheet 20 is formed. To form a discharge section formed by sealing. A discharge port 2b is formed in the center of the lower side of the discharge section. The inner bag sheet 20, for example, as shown in FIG. 1, has an octagon formed by a sealed seal portion 23, an upper side, and a lower side.

  The peripheral length of the inner bag 2 in the middle section 20b is smaller than the peripheral length of the outer bag 1 in a portion surrounding the interruption portion 20b of the inner bag 2 when the inner bag 2 is put in the outer bag 1 and the contents are filled. It is desirable to increase by 10% to 10%. Thereby, when the contents are filled and transported, friction occurs between the outer bag 1 and the inner bag 2 due to vibration, and the inner bag 2 becomes difficult to move in the outer bag 1. 2 and the outer bag 1 hardly come off. From that viewpoint, the coefficient of static friction between the back surface of the outer bag and the surface of the inner bag measured according to JIS K 7125 is preferably 0.04 or more and 0.8 or less, more preferably 0.1 or more and 0.38 or less. . The height of the inner bag must be at least the same as the height of the outer bag in order to weave the inner bag inside the outer bag and to prevent the contents from overflowing. It is necessary to consider that wrinkles may occur. In addition, if the length is too long, the electrical conductivity of the inner bag may be affected, and the sealing of the injection port may be complicated. Therefore, the height may be higher than the height of the outer bag (preferably 50 mm). Or more, more preferably 300 mm or more).

Further, the upper portion 20a and the lower portion 20c of the inner bag sheet 20 have regions outside the seal portion 23 in which the adjacent inner bag sheets 20 are sealed. That is, the inner bag sheet 20 has the unsealed non-sealed area 24 outside the seal portion 23 where the adjacent inner bag sheet 20 is sealed. In the inner bag sheet 20 shown in FIGS. 1 and 2, the middle portion 20 b, the lower portion of the upper portion 20 a, and the upper portion of the lower portion 20 c are rectangular, and the upper portion of the upper portion 20 a has an upper side (forming the inlet 2 a). The lower side 20c has a trapezoid whose shorter side is the lower side (side forming the discharge port 2b). In this case, the seal portions 23 for sealing the adjacent inner bag sheets 20 are formed by extending both sides of the trapezoid forming the upper part of the upper part 20a, the both sides of the middle part 20b, and the lower part of the lower part 20c. Are formed along the sides extending the both sides of the trapezoid forming.
Note that a quadrangular portion having the upper side as one side may be formed further above the upper side of the upper section 20a of the octagonal inner bag sheet 20 in FIG. 1, and similarly, the lower section of the lower section 20c may be formed. Further, a quadrangular portion having the lower side as one side may be formed further below the lower side. In this case, the shapes of the inlet and outlet of the bag and the inlet and outlet of the inner bag match, and the flow becomes easier when filling and discharging the filler, so that the working efficiency is improved.

  The inner bag sheet 20 has an exposed portion that can expose the surface of the conductive layer 21b. By doing so, it is possible to electrically connect a connection member 3 described later to the surface of the conductive layer 21b exposed at the exposed portion. Note that the surface of the conductive layer 21b means one surface (that is, a front surface or a back surface) of the conductive layer 21b, and does not include a side end. As a method of exposing the surface of the conductive layer 21b, a method in which the non-conductive layer 21a is not arranged in a part of the one surface of the conductive layer 21b may be used, but one surface of the conductive layer 21b and the conductive layer 21b The surface of the conductive layer 21b can be exposed by making non-adhesion with a layer adjacent to the conductive layer 21 and separating (turning) the layer if necessary.

  The exposed portion may be any position as long as the connecting member 3 described below can be electrically connected to the exposed surface of the conductive layer 21b, but is located outside the seal portion 23 as shown in FIG. Preferably, an exposed portion is formed in the non-seal region 24. By forming the exposed portion in the non-seal region 24 located outside the inner bag 2, the connecting member 3 described later can be easily and electrically connected to the surface of the conductive layer 21b exposed at the exposed portion. . In this case, it is preferable that the conductive layer 21b of the two laminated sheets 21 be non-adhered at the exposed portion, and as shown in FIG. Surface can be exposed.

<Connecting member>
The flexible container according to the present invention has a connection member for electrically connecting the conductive material of the outer bag sheet and the conductive layer of the inner bag sheet. Since the outer bag and the inner bag can be electrically connected by this connecting member, it is possible to discharge static electricity generated on the surfaces of the outer bag and the inner bag.

  As the connecting member 3, for example, as shown in FIG. 3, a conductive sheet 31 that is electrically connected to the surface of the conductive layer 21b exposed at the exposed portion of the inner bag sheet 20 can be used. The connection member 3 may further include a cover sheet 32 that covers at least a part of the conductive sheet 31. More specifically, as shown in FIG. 3, one conductive sheet 20 of the inner bag sheet 20 is turned up so that the surface of the conductive layer 21b is exposed, and the conductive sheet 31 is brought into contact with the surface of the conductive layer 21b. And the cover sheet 32 is arranged so as to cover the conductive sheet 31, and the whole can be sealed by heat sealing. A part of the conductive sheet 31 is not covered with the cover sheet 32, and the uncovered part of the conductive sheet 31 is connected to the conductive material (conductive thread 12) of the outer bag sheet 10. can do. As the conductive sheet 31, for example, a carbon black sheet can be used. The connection method is arbitrary, but the connection can be made, for example, by bonding with an adhesive or the like. The cover sheet 32 may be non-conductive or partially conductive.

When the connecting member 3 is fixed to the exposed portion of the inner bag sheet 20, the connecting member 3 may be attached to the exposed portion of the inner bag sheet 20 with an adhesive or an adhesive interposed therebetween. In this case, the surface specific resistance of the pressure-sensitive adhesive or the adhesive is desirably less than 1.0 × 10 ⁷ Ω. The mode of applying the pressure-sensitive adhesive or the adhesive is not particularly limited. With respect to the range to be applied, the coating may be applied to all portions where the connecting member 3 and the exposed portion of the inner bag sheet 20 overlap, or may be applied to a part thereof. It may be applied in a point-like manner, in a linear or planar manner, or in a combination of these so as to draw a specific pattern.

  When the inner bag sheet 20 has the seal layer 22 as the innermost layer serving as the inner surface of the inner bag 2, the seal layer of the inner bag sheet 20 is used as a material of the outermost layer of the connection member 3 arranged at a position adjacent thereto. When the inner bag 2 is formed by heat sealing using a material that can be heat-sealed with the inner layer 22, one end of the connecting member 3 is sandwiched between the seal layers 22 of the inner bag sheet 20 to be bonded. It may be sealed and one end of the connection member 3 may be fixed to the inner bag 2. Thereby, the connection member 3 can be firmly fixed to the inner bag 2.

  With the flexible container of the present invention having the above configuration, it is possible to connect the outer bag incorporating the conductive material and the inner bag having the non-conductive layer / conductive layer / non-conductive layer to release static electricity. It becomes possible. In the above description, the invention of the flexible container in which the conductive material of the outer bag and the surface of the conductive layer of the inner bag are electrically connected in advance by the connecting member has been described, but the outer bag, the inner bag, and the connecting member are described. May be supplied separately, and may be electrically connected later. In particular, since the above inner bag (the inner bag for a flexible container) is useful as an inner bag of an anti-static disaster flexible container, it is electrically connected to an outer bag of an existing anti-static disaster flexible container via a connecting member. By doing so, it is also possible to provide a flexible container for preventing electrostatic disaster. Therefore, each of the above members is also an embodiment of the present invention as a separate body.

Reference Signs List 1 outer bag 1a inlet 1b outlet 10 outer bag sheet 11 flat yarn 12 conductive thread 2 inner bag 2a inlet 2b outlet 20 inner bag sheet 20a upper portion 20b middle portion 20c lower portion 21 laminated sheet 21a non-conductive Layer 21b Conductive layer 22 Seal layer 23 Seal portion 24 Non-sealed area 3 Connection member 31 Conductive sheet 32 Cover sheet

Claims (6)

An outer bag that is formed by an outer bag sheet in which a conductive material is incorporated into a non-conductive plastic base material and that can release static electricity by the conductive material,
An inner bag formed of an inner bag sheet having a non-conductive layer / a conductive layer / a non-conductive layer, and an inner bag included in the outer bag;
A connection member that electrically connects the conductive material of the outer bag sheet and the conductive layer of the inner bag sheet,
The inner bag sheet has an exposed portion capable of exposing the surface of the conductive layer,
A flexible container , wherein the connection member is electrically connected to a surface of the conductive layer exposed at the exposed portion ,
The inner bag,
In the middle portion, at least two inner bag sheets are formed in a tubular shape so that the sides of adjacent inner bag sheets are in contact with each other, and are formed by sealing along each side. It has a cylindrical shape,
In the upper part located above the middle part, the injection part formed by sealing along the side having an angle with respect to the vertical direction from the side of the adjacent inner bag sheet toward the upper side. Doing
In the upper portion, the exposed portion is provided in a region outside the side where the adjacent inner bag sheet is sealed.
Flexible container . In the lower part located below the middle part of the inner bag, it is formed by sealing along the side having an angle with respect to the vertical direction from the side to the lower side of the adjacent inner bag sheet. The discharge section,
2. The flexible container according to claim 1 , wherein the lower portion has the exposed portion in a region outside a side where the adjacent inner bag sheets are sealed. 3. An outer bag that is formed by an outer bag sheet in which a conductive material is incorporated into a non-conductive plastic base material and that can release static electricity by the conductive material,
An inner bag formed of an inner bag sheet having a non-conductive layer / a conductive layer / a non-conductive layer, and an inner bag included in the outer bag;
A connection member that electrically connects the conductive material of the outer bag sheet and the conductive layer of the inner bag sheet,
The inner bag sheet has an exposed portion capable of exposing the surface of the conductive layer,
A flexible container , wherein the connection member is electrically connected to a surface of the conductive layer exposed at the exposed portion ,
The inner bag,
In the middle portion, at least two inner bag sheets are formed in a tubular shape so that the sides of adjacent inner bag sheets are in contact with each other, and are formed by sealing along each side. It has a cylindrical shape,
In the lower part located below the middle part of the inner bag, it is formed by sealing along the side having an angle with respect to the vertical direction from the side to the lower side of the adjacent inner bag sheet. The discharge section,
In the lower portion, the exposed portion is provided in a region outside a side where the adjacent inner bag sheet is sealed.
The flexible container according to claim 1. The flexible container according to any one of claims 1 to 3 , wherein the inner bag is formed using four inner bag sheets. The inner bag sheet is capable of exposing the surface of the conductive layer by making non-adhesion between one surface of the conductive layer and an adjacent layer thereof in the exposed portion. 5. The flexible container according to any one of 4 . The inner bag sheet is formed by stacking two laminated sheets each having a metal-deposited layer formed on one surface of a non-conductive layer so that the metal-deposited layers face each other,
The flexible container according to claim 5 , wherein the exposed portion is non-adhesive between the metal deposition layers of the two laminated sheets.

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