JP6566287B2 - Chemical solution storage container and chemical solution storage device - Google Patents

Description

  The present invention relates to a chemical solution storage container and a chemical solution storage device for storing a chemical solution such as an electrolyte for a lithium ion battery.

  Conventionally, for example, a chemical solution such as an electrolyte for a lithium ion battery is stored in a canister can (metal can), and a metal can containing the chemical solution is conveyed. And if necessary, the chemical solution is taken out from the inside of the metal can and used.

  The inside of the metal can from which the chemical solution has been taken out is then cleaned, and the chemical solution is again stored and transported next time.

  By the way, it is necessary to handle the electrolyte for the lithium battery carefully, and once cleaning the metal can containing the electrolyte for the lithium battery, it is necessary to clean with high precision, and the cleaning cost of the metal can is expensive. It has become.

  For example, for canister can cleaning, in addition to removing the contents, it is necessary to set up a process so that no residue remains after cleaning (Patent Document 1).

Japanese Patent Laid-Open No. 10-436

  As described above, when a chemical solution such as an electrolyte for a lithium battery is stored in a metal can, it is necessary to clean the inside of the metal can each time the chemical solution is taken out, and this cleaning cost is expensive.

  On the other hand, a chemical solution storage container is arranged in a metal can, a chemical solution nozzle is provided through the metal can and the chemical solution storage container, and the chemical solution is discharged to the outside through the chemical solution nozzle. Equipment has also been developed. Among these, when the chemical solution storage container has a double bag structure, that is, an inner bag and an outer bag, the inner bag storing the chemical solution is protected by the outer bag, and the chemical solution contamination of the metal can can be surely prevented. . When manufacturing such a chemical | medical solution storage container, an inner bag and an outer bag are aligned and heat-sealed mutually.

  However, when both the inner bag and the outer bag are made of a synthetic resin, the friction coefficient between the inner bag and the outer bag tends to increase. In this case, there is a problem that the slipping property between the inner bag and the outer bag is lowered, it becomes difficult to align the inner bag and the outer bag, and the efficiency of the bag making process is lowered.

  On the other hand, it is possible to improve the slipperiness between the inner bag and the outer bag by adding a slip agent to the inner bag and the outer bag, but the slip agent is dissolved in the chemical solution stored in the inner bag. The chemical solution is contaminated by the slip agent.

  The present invention has been made in view of the above points, and provides a chemical solution storage container and a chemical solution storage device that can prevent the stored chemical solution from being contaminated and can efficiently carry out the bag making process. For the purpose.

  The present invention provides a chemical solution storage container for storing a chemical solution, an inner bag for storing a chemical solution, an outer bag surrounding the inner bag, and a dispensing member extending through the inner bag and the outer bag. And the inner bag includes an outer layer disposed on the outer bag side, and an arithmetic mean roughness Ra of an outer surface of the outer layer is 0.08 μm or more. To do.

  In the chemical solution storage container described above, the arithmetic average roughness Ra of the outer surface of the outer layer may be 0.1 μm or more.

  In the above-described chemical solution storage container, the arithmetic average roughness Ra of the outer surface of the outer layer may be less than 2.50 μm.

  Further, in the above-described chemical solution storage container, the haze of the outer layer may be 80% or less.

  In the above-described chemical solution storage container, the outer layer of the inner bag may be formed by mixing two materials having different molecular weights.

  Moreover, the chemical | medical solution storage container mentioned above WHEREIN: The said outer side layer of the said inner bag may be made to be formed by mixing low density polyethylene and high density polyethylene.

  Moreover, the chemical | medical solution storage container mentioned above WHEREIN: You may make it the mass% of the said low density polyethylene be smaller than the mass% of the said high density polyethylene.

  In the above-described chemical container, the outer bag includes an inner layer disposed on the inner bag side, and the arithmetic average roughness Ra of the inner surface of the inner layer is 0.08 μm or more. May be.

  Further, in the above chemical solution storage container, the arithmetic average roughness Ra of the inner surface of the inner layer may be 0.1 μm or more.

  In the above-described chemical solution storage container, the arithmetic average roughness Ra of the inner surface of the inner layer may be less than 2.50 μm.

  Furthermore, in the chemical solution storage container described above, the haze of the inner layer may be 80% or less.

  Further, the present invention provides a chemical solution storage container for storing a chemical solution, an inner bag that stores the chemical solution, an outer bag that surrounds the inner bag, and an inner bag that is interposed between the inner bag and the outer bag. A pour member extending through the inner bag, the inner bag, and the outer bag, the inner bag including an outer layer disposed on the inner bag side, and the outer bag, An arithmetic average roughness Ra of at least one of the outer surface of the outer layer of the inner bag and the inner surface of the inner bag is 0.08 μm or more. An arithmetic mean roughness Ra of at least one of the outer side surface of the inner bag and the inner side surface of the inner layer of the outer bag is 0.08 μm or more.

  Further, the present invention provides a chemical solution storage device for storing a chemical solution, the above-described chemical solution storage container, and an outer can surrounding the chemical solution storage container, having an upper opening through which the dispensing member of the chemical solution storage container passes. There is provided a medical solution storage device comprising an outer can.

  Furthermore, the present invention provides a chemical solution storage bag for storing a chemical solution, including an inner layer and an outer layer disposed outside the inner layer, wherein the inner surface of the inner layer and the outer surface of the outer layer are A chemical solution storage bag is provided in which at least one of the arithmetic average roughness Ra is 0.08 μm or more.

  As described above, according to the present invention, it is possible to prevent the stored chemical solution from being contaminated and to efficiently perform bag making.

FIG. 1 is an enlarged view showing a dispensing member of the chemical solution storage device according to the present embodiment. FIG. 2 is a perspective view showing a dispensing member of the chemical solution storage device of FIG. FIG. 3 is an overall schematic view showing the chemical solution storage device of FIG. 1. FIG. 4 is a side view showing the chemical solution storage container and the dispensing member of FIG. Fig.5 (a) is sectional drawing which shows the material for inner bags, FIG.5 (b) is sectional drawing which shows the material for outer bags. FIG. 6 is a view showing a modification of the chemical solution storage device according to the present embodiment. FIGS. 7A, 7B, and 7C are views showing another modification of the chemical solution storage device according to the present embodiment. FIG. 8 is a diagram showing a modification of FIG. 9 (a) is a cross-sectional view showing the material for the inner bag of FIG. 8, FIG. 9 (b) is a cross-sectional view showing the material for the inner bag of FIG. 8, and FIG. FIG. 9 is a cross-sectional view showing a material for the outer bag of FIG. 8. FIG. 10 is a diagram showing the surface roughness and the static friction coefficient obtained in this example. FIG. 11 is a diagram showing the surface roughness and haze obtained in this example.

(Embodiment of the Invention)
Embodiments of the present invention will be described below with reference to the drawings.

  1 to 5 are views showing an embodiment of a chemical solution storage device for storing a chemical solution according to the present invention.

  First, an outline of the chemical solution storage device will be described with reference to FIGS. 1 to 3.

  As shown in FIGS. 1 to 3, the chemical solution storage device 1 includes a chemical solution storage container 10 for storing a chemical solution such as an electrolyte for a lithium ion battery, and a metal outer can (hereinafter also referred to as a metal can). 2). Among these, the chemical solution storage container 10 is disposed inside the metal can 2, and the metal can 2 surrounds the chemical solution storage container 10. In addition, the outer can 2 can be made of a synthetic resin in addition to a metal.

  The chemical solution storage container 10 stores a chemical solution such as a solution for a lithium ion battery. In addition to an electrolyte solution for a lithium ion battery, a chemical solution for resist removal, a chemical solution for etching, or other chemicals used in a semiconductor manufacturing process. A chemical solution can also be stored.

  Further, the chemical solution storage container 10 may store a resist removal chemical solution or etching solution used in the lead frame manufacturing process, or may store a resist removal chemical solution or etching solution used in the suspension substrate manufacturing process. Further, printing ink used in the printing process may be stored.

Examples of the electrolyte solution for lithium ion batteries stored in the chemical solution storage container 10 include organic electrolyte solutions containing Li ions such as LiClO ₄ and LiPF ₆ .

  Such an organic electrolytic solution dislikes moisture, halogen, metal ions, and the like. For this reason, it is suitable to use the material which does not contain these water | moisture contents, a halogen, a metal ion etc. as much as possible for the inner bag 11 which accommodates organic electrolyte solution so that it may mention later.

  As shown in FIG. 1, the metal can 2 has an upper opening 2 a, and the upper opening 2 a is sealed with a lid 5. The metal can 2 and the lid 5 are made of stainless steel as a whole.

  As illustrated in FIG. 4, the chemical solution storage container 10 includes an inner bag 11 in which a chemical solution 3 such as an electrolyte for a lithium ion battery is stored, an outer bag 12 that surrounds the inner bag 11, an inner bag 11, and an outer bag 12. And a pouring member 15 extending through the. Of these, the pouring member 15 passes through the upper opening 2 a of the metal can 2. The inner bag 11 corresponds to a chemical solution storage bag in which the outer surface 11E of the outer layer 11D has an arithmetic average roughness Ra of 0.1 μm or more, and the outer bag 12 has an arithmetic average roughness of the inner surface 12E of the inner layer 12B. It corresponds to a chemical solution storage bag with Ra of 0.1 μm or more. The term outside means the direction from the inner bag 11 toward the outer bag 12, and the term inside means the direction from the outer bag 12 toward the inner bag 11.

  Next, the attachment structure of the extraction member 15 and the lid 5 will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the pouring member 15 is fitted into the upper opening 2 a of the metal can 2. The lid 5 is provided so as to cover the pouring member 15 and seals the upper opening 2 a of the metal can 2. Further, the lid 5 is fixed by being bolted with a plurality of bolts 6 to the periphery of the upper opening 2 a of the metal can 2.

  The dispensing member 15 will be further described. The dispensing member 15 has a peripheral flange 21 at its upper end. When the peripheral flange 21 is fitted into the upper opening 2 a of the metal can 2, the pouring member 15 is positioned in the upper opening 2 a of the metal can 2.

  Further, the dispensing member 15 is filled with a chemical solution nozzle space 15A extending through a chemical solution nozzle 16 (described later) and a pressurized gas supplied from a pressurized gas supply nozzle 17 described later. A cylindrical partition wall 20 that partitions into the pressurized gas space 15B is provided. That is, a chemical solution nozzle space 15A through which the chemical solution nozzle 16 penetrates is formed inside the cylindrical partition wall 20 of the pouring member 15, and the outer space of the partition wall 20 in the pouring member 15 is added. It is a pressurized gas space 15B.

  The pouring member 15 has a bottom surface 22, and a communication hole 22 a is formed in the bottom surface 22. By this communication hole 22a, the pressurized gas space 15B of the extraction member 15 and the pressurized space 8 formed between the metal can 2 and the chemical solution storage container 10 communicate with each other.

  Moreover, the pouring member 15 has a connection port 26 that continuously extends downward from the partition wall 20. A seal fixing portion 25 to which a hermetic seal portion 13 formed by integrally sealing the inner bag 11 and the outer bag 12 is fixed is formed at the lower end portion of the connection port 26. The seal adhering portion 25 of the dispensing member 15 has a substantially elliptical planar shape, whereby the seal adhering portion 25 and the hermetic seal portion 13 of the chemical solution storage container 10 can be easily fixed.

  As described above, the chemical solution nozzle 16 penetrates into the chemical solution nozzle space 15A of the dispensing member 15, and the pressurized gas is supplied from the pressurized gas supply nozzle 17 into the pressurized gas space 15B. .

  As shown in FIGS. 1 to 3, the chemical liquid nozzle 16 extends in the chemical liquid nozzle space 15 </ b> A of the dispensing member 15 and is firmly held by the lid 5. The chemical liquid nozzle 16 is used to pour out the chemical liquid 3 in the chemical liquid storage container 10 and discharge it outward, but it can also be used for the purpose of filling the chemical liquid storage container 10 with the chemical liquid 3.

Further, the pressurized gas supply nozzle 17 is also firmly held by the lid 5, and an inert gas such as N ₂ gas is filled into the pressurized gas space 15 B of the extraction member 15 from the pressurized gas supply nozzle 17. be able to. The inert gas filled in the pressurized gas space 15B from the pressurized gas supply nozzle 17 is then added between the metal can 2 and the chemical solution storage container 10 through the communication hole 22a from the pressurized gas space 15B. It is sent into the pressure space 8. Then, by supplying an inert gas into the pressurizing space 8, the chemical solution storage container 10 can be pressurized from the outside, and the chemical solution 3 in the chemical solution storage container 10 can be discharged outward from the chemical solution nozzle 16. .

  Furthermore, a pressure gauge 18 for detecting the pressure in the pressurized gas space 15B is installed on the lid 5. Furthermore, a connector 16 a connected to an external line (not shown) is provided at the tip of the chemical solution nozzle 16 attached to the lid 5, and an external line is provided at the tip of the pressurized gas supply nozzle 17. A connector 17a connected to (not shown) is provided.

  Note that the above-described dispensing member 15 is made of a synthetic resin as a whole.

  Next, the chemical solution storage container 10 will be described with reference to FIGS. 4 and 5. The inner bag 11 constituting the chemical solution storage container 10 is obtained by preparing a pair of films made of the inner bag material 11A and heat-sealing the peripheral edges of the pair of films to form the heat seal portion 11a ( (See FIG. 5 (a)).

  The inner bag 11 has a laminated structure including an outer layer 11D arranged on the outer bag 12 side. Among these, the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D is 0.1 μm or more. Here, the arithmetic average roughness Ra is defined by JIS B0601-2001.

  In the form shown in FIG. 5A, the inner bag 11 has an inner layer 11B arranged on the inner side, an intermediate layer 11C, and an outer layer 11D arranged on the outer side, and has a three-layer structure. It has become. The intermediate layer 11C is disposed between the inner layer 11B and the outer layer 11D.

  The inner layer 11B, the intermediate layer 11C, and the outer layer 11D are all made of synthetic resin. For example, a low-cost and flexible polyolefin material such as polyethylene (PE) or polypropylene (PP) can be used. . In particular, for each of the layers 11B, 11C, and 11D, it is preferable to use a polyolefin to which a slip agent is not added.

  Since the inner layer 11B is in direct contact with the chemical solution 3, use a material that does not contain moisture, halogen, and metal ions as much as possible that the electrolyte for a lithium ion battery does not have, such as low moisture, low halogen, and low metal ion materials. Is preferred. This can prevent the chemical solution 3 stored in the inner bag 11 from being deteriorated or adversely affected by the inner bag 11.

  The material used for the inner layer 11B is preferably linear low-density polyethylene or low-density polyethylene, and is preferably selected according to the type of the chemical solution 3 stored in the inner bag 11. The material of the inner layer 11B may be formed of a single material, but may be formed by mixing linear low density polyethylene and low density polyethylene. In the latter case, the inner layer 11B can be easily formed.

  The intermediate layer 11C is preferably formed of linear low density polyethylene (L-LDPE). In this case, the strength of the intermediate layer 11C can be increased. Examples of the material used for the intermediate layer 11C include UMERIT 125FN and Evolu SP0511 (manufactured by Prime Polymer Co., Ltd.). These materials are preferably used alone. If there is no problem with the strength of the inner bag 11, the intermediate layer 11C can be omitted.

  The outer layer 11D includes two materials having different molecular weights and is formed by mixing these materials. Thereby, when producing the material 11A for inner bags, the surface roughness of the outer surface 11E of the outer layer 11D can be made rough. That is, at the time of film formation, the fluidity of the melted material can be reduced, whereby the material is cooled and solidified with the unevenness remaining on the surface of the material. In this way, the arithmetic average roughness Ra on the outer surface 11E of the outer layer 11D can be set to 0.1 μm or more.

  More specifically, the outer layer 11D preferably includes low density polyethylene (LDPE) and high density polyethylene (HDPE), and is formed by mixing low density polyethylene and high density polyethylene. Examples of the material used for the outer layer 11D include Suntec HD Creolex K4125 (made by Asahi Kasei Chemicals Corporation) as high-density polyethylene and Sumikasen G201-F (made by Sumitomo Chemical Co., Ltd.) as low-density polyethylene. it can. Furthermore, the mass% of the low density polyethylene is preferably smaller than the mass% of the high density polyethylene.

  In addition, the chemical solution 3 is stored in the inner bag 11, but the inner bag 11 is not damaged even if pressure is applied from the chemical solution 3 to the inner surface of the inner bag 11 during transportation. The corner 11b of the inner surface 11 has a curved surface.

  That is, the chemical solution storage container 10 having the inner bag 11 in which the chemical solution 3 is stored is arranged in the metal can 2 to obtain the chemical solution storage device 1. When the chemical solution storage device 1 is conveyed, It is also conceivable that pressure is applied to the inner surface of the inner bag 11 from the stored chemical solution 3.

  In such a case, when the corner 11b of the inner surface of the inner bag 11 has a polygonal shape, when pressure is applied from the chemical 3 to the inner surface of the inner bag 11, local stress is applied to the polygonal corner 11b. It is conceivable that the inner bag 11 is damaged near the corner 11b.

  In contrast, according to the present embodiment, the corner 11b of the inner surface of the inner bag 11 is formed of a curved surface. Therefore, even if pressure is applied from the chemical 3 to the inner surface of the inner bag 11 during transportation, The local stress is not generated in the corner 11b, and the inner bag 11 near the corner 11b can be prevented from being damaged.

  The corner portion 11b of the inner bag 11 having such a curved surface can be obtained by forming the heat seal portion 11a so that the corner portion 11b has a curved surface when the inner bag 11 is manufactured.

  Next, the outer bag 12 will be described. The outer bag 12 surrounds the inner bag 11 from the outside and is disposed in the metal can 2, protects the inner bag 11 from the outside, and the impact from the metal can 2 is directly applied to the inner bag 11. It functions so as not to be transmitted.

  The outer bag 12 has a laminated structure including an inner layer 12B disposed on the inner bag 11 side. Among these, the arithmetic average roughness Ra of the inner surface 12E of the inner layer 12B is 0.1 μm or more.

  In the form shown in FIG. 5 (b), the outer bag 12 has an inner layer 12B disposed on the inner side, an intermediate layer 12C, and an outer layer 12D disposed on the outer side, and has a three-layer structure. It has become. The intermediate layer 12C is disposed between the inner layer 12B and the outer layer 12D. The outer layer 12 </ b> D is disposed on the metal can 2 side when the chemical solution storage container 10 is disposed in the metal can 2.

  The inner layer 12B preferably has heat sealability with respect to the inner bag 11, and is preferably formed of, for example, polyolefin such as PE or PP. In particular, it is preferable to use a polyolefin to which a slip agent is not added for the inner layer 12B.

  The inner layer 12B includes two materials having different molecular weights, and is formed by mixing these materials. Accordingly, the surface roughness of the inner side surface 12E of the inner layer 12B of the outer bag 12 can be increased in the same manner as the outer layer 11D of the inner bag 11 described above.

  More specifically, the inner layer 12B, like the outer layer 11D of the inner bag 11, includes low density polyethylene and high density polyethylene, and is formed by mixing low density polyethylene and high density polyethylene. preferable. Examples of the material used for the inner layer 12B include Suntec HD Creolex K4125 as a high-density polyethylene and Sumikasen G201-F as a low-density polyethylene. Furthermore, the mass% of the low density polyethylene is preferably smaller than the mass% of the high density polyethylene.

  The intermediate layer 12C preferably functions as a gas barrier layer, and is preferably formed of, for example, aluminum (Al). Thereby, it is possible to prevent an external atmosphere from entering the chemical solution 3 in the inner bag 11.

  The outer layer 12D preferably has impact resistance, and is preferably formed of, for example, polyethylene terephthalate (PET) or stretched nylon (ON).

  As described above, the material 12A for the outer bag 12 has excellent impact resistance and gas barrier properties as a whole compared to the material 11A for the inner bag 11, while the material 11A for the inner bag 11 is used for the outer bag 12. Compared to the material 12A, it is formed of a material having a low water content, a low halogen content, and a low metal ion.

  By the way, the outer bag 12 is obtained by preparing a surface film, a back film, and a pair of gusset films made of the material 12A for the outer bag 12, and heat-sealing these peripheral edges to form the heat seal portion 12a.

  In particular, the outer bag 12 can have a gusset-type outer shape by increasing the area of the heat seal portion 12 a at the bottom 12 e of the outer bag 12. The outer bag 12 having such a gusset-type outer shape can stand by itself at the bottom 12e in the metal can 2.

  Thus, by allowing the outer bag 12 having a gusset-type outer shape to stand by itself in the metal can 2, the chemical solution storage container 10 can be stably disposed as a whole in the metal can 2. For this reason, the chemical | medical solution storage container 10 does not shake or slip | deviate in the metal can 2 at the time of conveyance, and the chemical | medical solution 3 accommodated in the inner bag 11 can be conveyed stably.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the manufacturing method of the chemical solution storage device 1 will be described.

  As shown in FIG. 4, the inner bag 11 is inserted into the outer bag 12 having a gusseted outer shape from the upper opening of the outer bag 12 and arranged. At this time, the inner bag 11 and the outer bag 12 are aligned so as to be heat-sealed in a desired positional relationship.

  Next, the pouring member 15 is inserted into the inner bag 11 from the upper opening of the inner bag 11.

Thereafter, the upper opening of the inner bag 11 and the upper opening of the outer bag 12 are aligned and heat sealed together.
As a result, the upper opening of the inner bag 11 and the upper opening of the outer bag 12 are integrally sealed to form the hermetic seal portion 13. At the same time, the seal fixing portion 25 of the pouring member 15 is also heat-sealed integrally with the inner bag 11 and the outer bag 12, and the pouring member 15 is fixed to the inner bag 11 and the outer bag 12 by the hermetic seal portion 13 (FIG. 4).

  Thus, the chemical | medical solution storage container 10 which has the inner bag 11 and the outer bag 12 and to which the pouring member 15 was attached is obtained. On the other hand, a lid 5 to which a chemical solution nozzle 16, a pressurized gas supply nozzle 17, and a pressure gauge 18 are attached in advance is prepared. Next, the chemical solution nozzle 16 is inserted into the chemical solution nozzle space 15 </ b> A formed by the partition wall 20 of the extraction member 15, and the chemical solution storage container 10, the lid 5, and the extraction member 15 are combined together. The

  Next, the chemical solution storage container 10 is inserted into the metal can 2 from the upper opening 2 a, and the dispensing member 15 is fitted into the upper opening 2 a of the metal can 2. In this case, the peripheral flange 21 of the pouring member 15 is fitted into the upper opening 2 a of the metal can 2, and the lid 5 is bolted to the periphery of the upper opening 2 a of the metal can 2 by the bolt 6 provided on the peripheral edge. The Further, the pressurized gas supply nozzle 17 attached to the lid 5 is inserted into the pressurized gas space 15 </ b> B of the extraction member 15.

  In use, the chemical liquid nozzle 16 is connected to an external supply mechanism (not shown) via the connector 16a, and the chemical liquid 3 is supplied into the inner bag 11 from the supply mechanism.

  Next, the connector 16a of the chemical solution nozzle 16 is sealed with a cap (not shown), and the chemical solution storage device 1 including the chemical solution storage container 10 having the inner bag 11 and the outer bag 12 and the metal can 2 is the destination. It is conveyed to. Thereafter, the cap is removed from the connector 16a of the chemical liquid nozzle 16 at the transport destination, and the connector 16a of the chemical liquid nozzle 16 is connected to a discharge mechanism (not shown).

Next, the connector 17 a of the pressurized gas supply nozzle 17 is connected to an N ₂ gas supply mechanism (not shown), and N is introduced into the pressurized gas space 15 B of the extraction member 15 from the pressurized gas supply nozzle 17. _Two gases are supplied. The N ₂ gas in the pressurized gas space 15B is sent into the pressurized space 8 between the metal can 2 and the chemical solution storage container 10 from the communication hole 22a of the extraction member 15, and the chemical solution storage container 10 is moved from the outside. Pressurize. Thus, the chemical liquid 3 stored in the inner bag 11 of the chemical liquid storage container 10 can be discharged from the chemical liquid nozzle 16 to the discharge mechanism side. During this time, the supply amount of N ₂ gas can be adjusted while observing the pressure of the N ₂ gas as shown in the pressure gauge 18.

  As described above, according to the present embodiment, the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 is 0.1 μm or more. Thereby, the slipperiness between the inner bag 11 and the outer bag 12 can be improved. For this reason, when manufacturing the chemical | medical solution storage container 10, the inner bag 11 and the outer bag 12 can be aligned easily, and a bag making process can be performed efficiently. Further, as described above, by setting the arithmetic average roughness Ra of the outer surface 11E to 0.1 μm or more, it is possible to prevent wrinkles from being formed during the bag making process, and to greatly improve the bag making processability. it can. Furthermore, according to the present embodiment, the slipperiness between the inner bag 11 and the outer bag 12 can be improved without adding a slip agent to the inner bag 11. For this reason, it can be avoided that the chemical solution 3 stored in the inner bag 11 is contaminated with the slip agent being eluted.

  According to the present embodiment, the outer layer 11D of the inner bag 11 is formed by mixing two materials having different molecular weights. Thereby, the fluidity of the melted material can be lowered during film formation, and thus the material can be cooled in a state in which unevenness remains on the surface thereof. For this reason, the surface roughness of the outer surface 11E of the outer layer 11D can be increased. In particular, when the outer layer 11D is formed by mixing low density polyethylene and high density polyethylene, the surface roughness of the outer surface 11E of the outer layer 11D can be increased, and the strength of the inner bag 11 is improved. be able to. Moreover, when the mass% of the low density polyethylene is smaller than the mass% of the high density polyethylene, the impact resistance of the inner bag 11 can be improved.

Moreover, according to this Embodiment, arithmetic mean roughness Ra of the inner surface 12E of the inner layer 12B of the outer bag 12 is 0.1 micrometer or more. Thereby, the slipperiness between the inner bag 11 and the outer bag 12 can be further improved, and the bag making process can be performed more efficiently.
In addition, as described above, by setting the arithmetic average roughness Ra of the inner surface 12E to be 0.1 μm or more, wrinkles are prevented from being formed during the bag making process, and the bag making processability is greatly improved. it can. Furthermore, the slipping property between the inner bag 11 and the outer bag 12 can be further improved without adding a slip agent to the outer bag 12. For this reason, even if the inner bag 11 is unexpectedly damaged and the chemical liquid 3 leaks from the inner bag 11, it is possible to avoid the chemical liquid 3 from being contaminated by the slip agent being eluted into the chemical liquid 3.

  Further, according to the present embodiment, the inner bag 11 in which the chemical solution 3 is stored is surrounded by the outer bag 12. Thereby, the chemical | medical solution storage container 10 can be made into a double bag structure. For this reason, the inner bag 11 in which the chemical | medical solution 3 was accommodated is protected by the outer bag 12, and it can prevent that the inner bag 11 is damaged. Further, even when the inner bag 11 is unexpectedly damaged, the chemical solution 3 can be confined in the outer bag 12, and the metal can 2 can be prevented from being contaminated with the chemical solution.

  Further, according to the present embodiment, the chemical solution storage device 1 for storing the chemical solution is disposed in the metal can 2 and the metal can 2 and has the inner bag 11 and the outer bag 12 that store the chemical solution 3. 10. For this reason, compared with the case where the chemical solution 3 is directly stored in the metal can 2, it is not necessary to frequently wash the metal can 2, and expensive cleaning costs can be reduced.

  Furthermore, a lid 5 that covers the pouring member 15 and seals the upper opening 2a of the metal can 2 is provided. The lid 5 has a chemical solution nozzle 16 that penetrates the pouring member 15 and a pressurized gas supply. A nozzle 17 is attached in advance. For this purpose, the pouring member 15 is attached to the chemical solution storage container 10 in advance, the chemical solution nozzle 16 is passed through the pouring member 15, and the lid 5 is fitted and fixed to the upper opening 2 a of the metal can 2. The chemical solution nozzle 16 and the pressurized gas supply nozzle 17 can be easily and simply installed.

  As described above, the embodiment of the present invention has been described in detail. However, the chemical solution storage container and the chemical solution storage device according to the present invention are not limited to the above-described embodiment, and do not depart from the spirit of the present invention. Various changes are possible.

  For example, in the above-described embodiment, the example in which the cylindrical member wall 15 that divides the inside of the extraction member 15 into the chemical solution nozzle space 15A and the pressurized gas space 15B is provided in the extraction member 15 has been described. However, the present invention is not limited to this, and the cylindrical partition wall 20 may be extended from the lower surface of the lid 5 to be formed integrally with the lid 5 without providing the cylindrical partition wall 20 on the extraction member 15.

(Modification 1)
Next, a modified example of the chemical solution storage container according to the present embodiment will be described with reference to FIG.

  In the modification shown in FIG. 6, only the outer bag of the chemical solution storage container has a three-side seal structure, and the other configuration is substantially the same as the embodiment shown in FIGS. In the modification shown in FIG. 6, the same parts as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the chemical solution storage container 10 includes an inner bag 11 in which a chemical solution 3 such as an electrolyte for a lithium ion battery is stored, and an outer bag 12 that surrounds the inner bag 11. In FIG. 6, for convenience, the chemical solution storage container 10 from which the dispensing member 15 has been removed is shown.

  The outer bag 12 is obtained by folding a single film made of the material 12A for the outer bag 12, and heat-sealing both side edges to form the heat seal portion 12a. That is, the outer bag 12 has a three-way seal structure. The film for the outer bag 12 preferably has a laminated structure as shown in FIG.

  Thus, since the outer bag 12 has a three-way seal structure, the number of seal portions can be reduced, and thereby the strength of the outer bag 12 can be improved.

(Modification 2)
Next, another modification of the chemical solution storage container according to the present embodiment will be described with reference to FIG.

  The modification shown in FIG. 7 is different in that the inner bag and the outer bag of the chemical solution storage container are formed of a cylindrical film, and other configurations are substantially the same as those of the embodiment shown in FIGS. . In the modification shown in FIG. 7, the same parts as those in the embodiment shown in FIGS.

  As shown in FIG. 7, the chemical solution storage container 10 includes an inner bag 11 in which a chemical solution 3 such as an electrolyte for a lithium ion battery is stored, and an outer bag 12 that surrounds the inner bag 11. An extraction member 15 extending through the outer bag 12 is provided.

  And the sealing adhering part 25 of the pouring member 15 is heat-sealed by the hermetic seal part 13 formed by sealing the inner bag 11 and the outer bag 12 together, and the pouring member 15 becomes the inner bag 11 and the outer bag 12. It is fixed to.

  The inner bag 11 and the outer bag 12 are each formed using a cylindrical film having upper openings 11f and 12f and lower openings 11g and 12g that do not include a seal portion. The cylindrical film for the inner bag 11 has a laminated structure as shown in FIG. 5 (a), and the cylindrical film for the outer bag 12 has a laminated structure as shown in FIG. 5 (b). It is preferred that

  In manufacturing the inner bag 11 and the outer bag 12, first, the inner bag 11 made of a cylindrical film is placed in the outer bag 12 (see FIG. 7A). At this time, alignment is performed so that the cylindrical film for the inner bag 11 and the cylindrical film for the outer bag 12 are heat-sealed in a desired positional relationship. Next, the lower openings 11g and 12g of the inner bag 11 and the outer bag 12 are integrally heat-sealed. Thereby, the lower openings 11g and 12g of the inner bag 11 and the outer bag 12 are sealed, and the bottom seal portion 14 is formed (see FIG. 7B).

  Next, the extraction member 15 is inserted into the inner bag 11 from the upper opening 11 f of the inner bag 11.

  Thereafter, the upper opening 11f of the inner bag 11 and the upper opening 12f of the outer bag 12 are aligned and heat sealed together. As a result, the upper opening 11f of the inner bag 11 and the upper opening 12f of the outer bag 12 are integrally sealed, and the hermetic seal portion 13 is formed. At the same time, the seal fixing portion 25 of the pouring member 15 is also heat-sealed integrally with the inner bag 11 and the outer bag 12, and the pouring member 15 is fixed to the inner bag 11 and the outer bag 12 by the hermetic seal portion 13.

  As described above, since both the inner bag 11 and the outer bag 12 are formed of a cylindrical film, the inner bag 11 is inserted into the outer bag 12, and the inner bag 11 and the outer bag 12 are aligned to open the lower opening 11g. , 12g and the upper openings 11f and 12f are heat-sealed, whereby the chemical solution storage container 10 can be easily obtained.

  Moreover, in this Embodiment mentioned above, the arithmetic mean roughness Ra of the inner surface 12E of the inner side layer 12B of the outer bag 12 was demonstrated to the 0.1 micrometer or more. However, the arithmetic average roughness Ra of the inner surface 12E of the inner layer 12B of the outer bag 12 is not limited to this. That is, the arithmetic average roughness Ra of the inner surface 12E may be less than 0.1 μm. Even in this case, since the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 is 0.1 μm or more, the slipperiness between the inner bag 11 and the outer bag 12 is improved. Thus, the bag making process can be performed efficiently. In this case, the material of the inner layer 12B of the outer bag 12 may be formed of a single material such as polyolefin, and may be arbitrary as long as it has heat sealability with respect to the inner bag 11. .

  Moreover, in this Embodiment mentioned above, the inner layer 12B of the outer bag 12 demonstrated the example which uses the polyolefin to which a slip agent is not added. However, the present invention is not limited to this, and a material to which a slip agent is added may be used. Even in this case, since the chemical solution 3 is stored in the inner bag 11, it is possible to prevent the slip agent from eluting into the chemical solution 3 and to improve the slipperiness between the inner bag 11 and the outer bag 12. .

  Moreover, in this Embodiment mentioned above, the outer side layer 11D of the inner bag 11 contained the two materials from which molecular weight mutually differs, and demonstrated the example formed by mixing these materials. However, the present invention is not limited to this, and if the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 is 0.1 μm or more, the material forming the outer layer 11D is limited. There is no. The same applies to the inner layer 12B of the outer bag 12.

  Moreover, in this Embodiment mentioned above, the example whose arithmetic mean roughness Ra of the outer surface 11E of the outer side layer 11D of the inner bag 11 is 0.1 micrometer or more was demonstrated. However, the present invention is not limited to this, and the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D may be 0.08 μm or more. That is, if the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D is 0.08 μm or more even if it is less than 0.1 μm, the slipperiness between the inner bag 11 and the outer bag 12 is improved. Can do. Similarly, the arithmetic average roughness Ra of the inner surface 12E of the inner layer 12B of the outer bag 12 is not limited to being 0.1 μm or more, and may be 0.08 μm or more.

  In the present embodiment described above, the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 is preferably less than 2.50 μm. Thereby, it can suppress that the transparency of outer side layer 11D falls because arithmetic mean roughness Ra of the outer surface 11E becomes large. That is, when the transparency of the outer layer 11D is lowered, there is a possibility that it may be difficult to visually check whether or not the chemical solution is stored in the inner bag 11, and the handling property of the operator may be lowered. Arise. In addition, there is a possibility that the operator may accidentally spill the chemical solution. In this case, if the chemical solution is harmful, it may cause a problem in terms of safety.

  However, as described above, by setting the arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D to less than 2.50 μm, it is possible to suppress a decrease in the transparency of the outer layer 11D. For this reason, it is possible to visually check whether or not the chemical solution is stored in the inner bag 11, and it is possible to improve the handleability of the operator and ensure safety.

  For this reason, the haze of the outer layer 11D of the inner bag 11 is preferably 80% or less. Here, the haze is defined by JIS K7136. The inner layer 11B and the intermediate layer 11C of the inner bag 11 are preferably formed and laminated using a synthetic resin material that can ensure visibility. From this, the transparency of the film forming the inner bag 11 can be influenced relatively greatly by the haze of the outer layer 11D. For this reason, as above-mentioned, by making haze of outer side layer 11D into 80% or less, the fall of the transparency of the film of the inner bag 11 can be suppressed, and operator's handling property is improved and safety is improved. Can be secured.

  In order to suppress a decrease in the transparency of the outer bag 12, the intermediate layer 12C of the outer bag 12 is preferably formed of aluminum oxide or silicon oxide, and is low in ethylene vinyl alcohol or polyamide. You may form with the resin layer which has gas permeability. In this case, the intermediate layer 12 </ b> C can function as a gas barrier layer, and can ensure transparency so that the chemical solution in the inner bag 11 can be visually recognized.

  Also in the outer bag 12, like the inner bag 11, the arithmetic average roughness Ra of the inner surface 12E of the inner layer 12B is preferably less than 2.50 μm, and the haze of the inner layer 12B is It is preferable that it is 80% or less.

  Furthermore, in this Embodiment mentioned above, the chemical | medical solution storage container 10 demonstrated the example provided with the inner bag 11 and the outer bag 12. FIG. However, it is not limited to this. For example, as shown in FIGS. 8 and 9, the chemical solution storage container 10 may have a triple bag structure.

  That is, the chemical solution storage container 10 shown in FIGS. 8 and 9 includes an inner bag 11, an outer bag 12, and an inner bag 30 interposed between the inner bag 11 and the outer bag 12. The inner bag 30 is obtained by preparing a pair of films made of the inner bag material 30A and heat-sealing the peripheral edges of the pair of films to form the heat seal portion 30a. Here, as shown in FIG. 9B, the inner bag 30 is an example of a single layer film. The pouring member 15 extends through the inner bag 11, the inner bag 30 and the outer bag 12.

  8 and 9, the arithmetic average roughness Ra of at least one of the outer surface 11E of the outer layer 11D of the inner bag 11 and the inner surface 30B of the inner bag 30 (the surface on the inner bag 11 side) is 0.08 μm or more. In addition, the arithmetic average roughness Ra of at least one of the outer surface 30C (the surface on the outer bag 12 side) of the inner bag 30 and the inner surface 12E of the inner layer 12B of the outer bag 12 is 0.08 μm or more. Yes.

  Here, when the arithmetic average roughness Ra of the inner side surface 30B of the inner bag 30 is 0.08 μm or more, or when the arithmetic average roughness Ra of the outer side surface 30C of the inner bag 30 is 0.08 μm or more, The bag 30 can be formed of the same material as the outer layer 11D of the inner bag 11 (or the inner layer 12B of the outer bag 12). Further, when the inner bag 30 has a laminated structure, for example, an inner layer (not shown) arranged on the inner bag 11 side and an outer layer (not shown) arranged on the outer bag 12 side. And the inner layer and the outer layer of the inner bag 30 can be formed of the same material as the outer layer 11D of the inner bag 11 (or the inner layer 12B of the outer bag 12), respectively. In this case, another layer may be formed between the inner layer and the outer layer of the inner bag 30.

  According to the chemical solution storage container 10 as shown in FIG. 8, the slipping property between the inner bag 11 and the inner bag 30 can be improved, and the slipping property between the inner bag 30 and the outer bag 12 is improved. The inner bag 11, the inner bag 30, and the outer bag 12 can be easily aligned, and the bag making process can be performed efficiently. In particular, by setting the arithmetic average roughness Ra of both the outer side surface 11E of the inner bag 11 and the inner side surface 30B of the inner bag 30 to 0.08 μm or more, the sliding property between the inner bag 11 and the inner bag 30 is further improved. This can be further improved. Similarly, by setting the arithmetic average roughness Ra of both the outer side surface 30C of the inner bag 30 and the inner side surface 12E of the outer bag 12 to be 0.08 μm or more, the slipperiness between the inner bag 30 and the outer bag 12 is improved. This can be further improved. The chemical container 10 is not limited to the triple bag structure as shown in FIGS. 8 and 9, and the arithmetic average roughness Ra of at least one of the surfaces of the bags adjacent to each other is set. If it is 0.08 μm or more, the number of bags such as a quadruple bag structure is not limited.

  Based on this Embodiment mentioned above, the inner bag 11 as a chemical | medical solution storage bag was produced, and arithmetic mean roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 was measured. Here, a single layer film corresponding to the outer layer 11D of the inner bag 11 was formed, and the arithmetic average roughness Ra was measured.

Example 1
The outer layer 11D of the inner bag 11 was formed by mixing 20% by mass of low density polyethylene and 80% by mass of high density polyethylene. Specifically, the outer layer 11D of the inner bag 11 is made of inflation by mixing 20% by mass of Sumikasen G201-F (low density polyethylene) and 80% by mass of Suntec HD Creolex K4125 (high density polyethylene). Obtained by filming. Inflation film formation was performed with a die diameter of 1060 mm, a feed rate of 18 m / min, and a film formation temperature of 170 to 175 ° C.

  The arithmetic average roughness Ra of the outer surface 11E of the outer layer 11D of the inner bag 11 obtained as described above was measured. The results are shown in Table 1 and FIG. Note that a non-contact surface shape measuring instrument (New View 6300, manufactured by Zygo Corporation) was used to measure the arithmetic average roughness Ra.

  As shown in Table 1 and FIG. 10, the outer layer 11D of the inner bag 11 is formed by mixing 20% by mass of Sumikasen G201-F and 80% by mass of Suntec HD Creolex K4125. It was confirmed that Ra was increased to 0.1 μm or more.

  Further, the static friction coefficient μs of the outer surface of the inner bag 11 was measured and shown in Table 1 and FIG. In addition, the friction measuring device (TR-2, the Toyo Seiki Co., Ltd. product) was used for the measurement of a static friction coefficient. The static friction coefficient was measured by rubbing the film to be measured against a stainless steel reference plate. In FIG. 10, the coordinates indicating the static friction coefficient are logarithmic coordinates.

  As shown in Table 1 and FIG. 10, the outer layer 11D of the inner bag 11 is formed by mixing 20% by mass of Sumikasen G201-F and 80% by mass of Suntec HD Creolex K4125, thereby providing a coefficient of static friction μs. Was confirmed to be 0.20 or less.

  Here, the inventor has found that the threshold value of the static friction coefficient μs is 0.20, but even if it is 0.40, it has sufficient slipperiness.

  In general, the coefficient of static friction can be expressed by a friction angle (the minimum angle at which an object placed on a slope starts to slide due to its own weight). For example, the friction angle when the coefficient of static friction is 5.00 is about 80 ° as in Comparative Example 2 shown in Table 1 described later. In this case, the object starts to slide by its own weight unless the inclined surface is inclined to 80 °. There is nothing. For example, when the coefficient of static friction is 1.00, the friction angle is 45 °, and in this case, the object can slide out by inclining the slope to 45 °. On the other hand, the friction angle when the coefficient of static friction is 0.40 is about 22 °. In this case, the object becomes more slippery as the object starts to slide by simply setting the angle of the slope to 22 °.

  If it is a slippery surface having a coefficient of static friction equal to or less than such a friction angle of 22 °, scratches and wrinkles may be formed on the film in the alignment process of the inner bag 11 and the outer bag 12 in the bag making process. The present inventors have found that the film can be prevented from being damaged and the inner bag 11 and the outer bag 12 can be efficiently aligned. For this reason, by setting the threshold value of the static friction coefficient to 0.40, it is possible to select the outer layer 11D that can align the inner bag 11 and the outer bag 12 without any inconvenience. As a matter of course, the outer layer 11D according to the first embodiment can satisfy the threshold value of the static friction coefficient. Further, by setting the threshold value of the static friction coefficient to 0.40, the threshold value of the arithmetic average roughness Ra can be set to 0.08 μm.

  Further, the haze of the outer layer 11D of the inner bag 11 formed as described above was measured and shown in Table 1 and FIG. As shown in Table 1 and FIG. 11, the haze of the outer layer 11D was 80% or less. A haze meter (HM-150, manufactured by Murakami Color Research Laboratory) was used for haze measurement. Moreover, transparency was confirmed visually and it confirmed that the said outer side layer 11D had the transparency of the grade which can visually recognize the chemical | medical solution in the inner bag 11. FIG.

(Example 2)
Further, as Example 2, for SPUM-SL (manufactured by DNP Technopack Co., Ltd.), the arithmetic average roughness Ra, static friction coefficient μs, and haze of the outer surface were measured in the same manner as in Example 1, and Table 1, FIG. 10 and FIG. Note that, unlike the first embodiment, SPUM-SL is formed of a single material.

  As shown in Table 1 and FIG. 10, in the outer layer 11D in Example 2, it was confirmed that the arithmetic average roughness Ra was 0.08 μm or more and the threshold value could be satisfied. It was also confirmed that the arithmetic average roughness Ra was less than 2.50 μm. It was also confirmed that the static friction coefficient μs was 0.40 or less and the threshold value could be satisfied. Furthermore, as shown in Table 1 and FIG. 11, it was visually confirmed that the haze was 80% or less and the chemical liquid had a degree of transparency that could be visually recognized.

(Example 3)
Further, as Example 3, for UBE polyethylene B128 (manufactured by Ube Maruzen Polyethylene Co., Ltd.), the arithmetic average roughness Ra, static friction coefficient μs, and haze of the outer surface were measured in the same manner as in Example 1, and Table 1, FIG. 10 and FIG. Unlike the first embodiment, UBE polyethylene B128 is formed of a single material.

  As shown in Table 1 and FIG. 10, in the outer layer 11D in Example 3, it was confirmed that the arithmetic average roughness Ra was 0.08 μm or more and the threshold value could be satisfied. It was also confirmed that the arithmetic average roughness Ra was less than 2.50 μm. It was also confirmed that the static friction coefficient μs was 0.40 or less and the threshold value could be satisfied. Furthermore, as shown in Table 1 and FIG. 11, it was visually confirmed that the haze was 80% or less and the chemical liquid had a degree of transparency that could be visually recognized.

(Comparative example)
In Table 1 and FIG. 10, as Comparative Example 1, the arithmetic average roughness Ra when the outer layer 11D is formed of Kernel KF273 (linear low density polyethylene, manufactured by Nippon Polyethylene Co., Ltd.) and Comparative Example 2 The results of measuring the arithmetic average roughness Ra when formed with Evolue SP0511 (linear low density polyethylene, manufactured by Prime Polymer Co., Ltd.) are shown. In addition, as Comparative Example 3, the arithmetic average roughness Ra when the outer layer 11D is formed of Novatec LC602A (manufactured by Nippon Polyethylene Co., Ltd.) is shown. Furthermore, in Table 1, FIG. 10, and FIG. 11, the static friction coefficient and haze of these comparative examples 1-3 were shown. The arithmetic average roughness Ra, the static friction coefficient, and the haze were measured in the same manner as in Example 1. In Comparative Example 3, the arithmetic average roughness Ra was 2700 nm, and the haze was 88.2%. And it confirmed visually that a chemical | medical solution was difficult to visually recognize. For this reason, Novatec LC602A is handled as Comparative Example 3 in that it is difficult to visually recognize the chemical solution.

DESCRIPTION OF SYMBOLS 1 Chemical solution storage apparatus 2 Metal can 2a Upper opening 3 Chemical solution 5 Lid 6 Bolt 8 Pressurization space 10 Chemical solution storage container 11 Inner bag 11A Material 11B Inner layer 11C Middle layer 11D Outer layer 11E Outer side surface 11a Heat seal part 11b Corner part 12 Outer bag 12A Material 12B Inner layer 12C Intermediate layer 12D Outer layer 12E Inner side surface 12a Heat seal part 13 Sealing seal part 15 Outlet member 15A Chemical solution nozzle space 15B Pressurized gas space 16 Chemical solution nozzle 17 Pressurized gas supply nozzle 20 Cylindrical partition wall 22 Bottom surface 22a Communication hole 25 Seal fixing portion 26 Connection port 30 Inner bag 30A Material 30B Inner side surface 30C Outer side surface 30a Heat seal portion

Claims (12)

In the chemical storage container for storing chemicals,
An inner bag for storing the chemical,
An outer bag surrounding the inner bag;
An extraction member extending through the inner bag and the outer bag, and
The inner bag includes an outer layer disposed on the outer bag side,
The arithmetic average roughness Ra of the outer surface of the outer layer is 0.08 μm or more and less than 2.50 μm ,
A chemical solution storage container , wherein a static friction coefficient of the outer surface of the outer layer is 0.40 or less . 2. The chemical solution storage container according to claim 1, wherein an arithmetic average roughness Ra of the outer surface of the outer layer is 0.1 μm or more and less than 2.50 μm. The chemical solution storage container according to claim 1 or 2 , wherein the haze of the outer layer defined by JIS K7136 is 80% or less. The chemical solution container according to any one of claims 1 to 3 , wherein the outer layer of the inner bag is formed by mixing two materials having different molecular weights. The chemical solution container according to any one of claims 1 to 4 , wherein the outer layer of the inner bag is formed by mixing low density polyethylene and high density polyethylene. The chemical solution storage container according to claim 5 , wherein a mass% of the low density polyethylene is smaller than a mass% of the high density polyethylene. The outer bag includes an inner layer disposed on the inner bag side,
The chemical liquid storage container according to any one of claims 1 to 6 , wherein an arithmetic average roughness Ra of an inner surface of the inner layer is 0.08 µm or more. The chemical solution storage container according to claim 7 , wherein an arithmetic average roughness Ra of the inner surface of the inner layer is 0.1 µm or more. The chemical solution storage container according to claim 7 or 8 , wherein an arithmetic average roughness Ra of the inner surface of the inner layer is less than 2.50 µm. The chemical solution storage container according to claim 9 , wherein the inner layer has a haze of 80% or less as defined in JIS K7136 . In the chemical storage container for storing chemicals,
An inner bag for storing the chemical,
An outer bag surrounding the inner bag;
An intermediate bag interposed between the inner bag and the outer bag;
A pouring member extending through the inner bag, the inner bag, and the outer bag,
The inner bag includes an outer layer disposed on the inner bag side,
The outer bag includes an inner layer disposed on the inner bag side,
In at least one of the outer surface of the outer layer of the inner bag and the inner surface of the inner bag , the arithmetic average roughness Ra is 0.08 μm or more and less than 2.50 μm and the static friction coefficient is 0.40 or less . And in at least one of the outer surface of the inner bag and the inner surface of the inner layer of the outer bag , the arithmetic average roughness Ra is 0.08 μm or more and less than 2.50 μm and the static friction coefficient is 0.40. chemical container, wherein the or less. In the chemical storage device for storing chemicals,
The chemical solution storage container according to any one of claims 1 to 11 ,
An outer can surrounding the medicinal solution storage container, the outer can having an upper opening through which the pouring member of the medicinal solution storage container penetrates.

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