Liquid Storage Bag

Abstract

The present invention provides a liquid storage bag as an ink bag that can ensure light-shielding properties while suppressing cost increases. The liquid storage bag of the present invention comprises: a bag body that can store liquid; and a supply unit that supplies the liquid stored in the bag body to the outside. The bag body is formed by a film (31), and the film (31) has a first base layer (33), a second base layer (39), and a first black coating layer (38) located between the first base layer (33) and the second base layer (39). The first black coating layer (38) is formed by a black colorant that covers the entire surface of the second base layer (39).

Description

Technical Field

[0001] The invention relates to a liquid storage bag for storing liquid. Background Art

[0002] For example, as in Patent Document 1, there is an ink bag body as an example of a liquid storage bag that can store ink as an example of a liquid. The ink bag body has an ink storage portion as an example of a bag body and an ink outlet portion as an example of a supply portion. The ink storage portion is formed of a multilayer film as an example of a thin film. The multilayer film has a light shielding layer formed of polyethylene or aluminum containing carbon black.

[0003] Although aluminum is excellent in light-shielding properties, it is more expensive than resins, etc. Polyethylene containing carbon black also requires a process of boiling carbon black into polyethylene, and is therefore more expensive than ordinary polyethylene.

[0004] Patent Document 1: International Publication No. 2006 / 046464 Summary of the invention

[0005] A liquid storage bag that solves the above-mentioned problem comprises: a bag body, which can store liquid; a supply part, which supplies the liquid stored in the bag body to the outside, the bag body is formed by a film, and the film has: a first base layer; a second base layer; a black coating layer, which is located between the first base layer and the second base layer, and the black coating layer is formed by a black colorant that covers the entire surface of the second base layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of one embodiment of a printing device equipped with a liquid storage bag.

[0007] Figure 2 A schematic cross-sectional view of the film.

[0008] Figure 3 This is a schematic cross-sectional view of a film according to a first modification.

[0009] Figure 4 This is a schematic cross-sectional view of a film according to a second modification.

[0010] Figure 5 This is a schematic cross-sectional view of a film according to a third modification.

[0011] Figure 6 This is a schematic cross-sectional view of a film according to a fourth modification.

[0012] Figure 7 It is a schematic cross-sectional view of a film according to a fifth modification.

[0013] Figure 8It is a schematic cross-sectional view of a film according to a sixth modification.

[0014] Fig. 9 This is a schematic cross-sectional view of a film according to a seventh variation.

[0015] Fig.10 It is a schematic cross-sectional view of a film according to an eighth modification.

[0016] Fig.11 It is a schematic cross-sectional view of a film according to a ninth variation.

[0017] Fig.12 It is a schematic cross-sectional view of a film according to a tenth variation. DETAILED DESCRIPTION

[0018] Implementation

[0019] Hereinafter, one embodiment of the liquid storage bag will be described with reference to the drawings. The liquid storage bag stores liquid supplied to a printing device, for example. The printing device is, for example, an inkjet printer that prints by ejecting ink, an example of liquid, onto a medium such as paper.

[0020] In the drawings, the printing device 11 is placed on a horizontal plane, the direction of gravity is represented by the Z axis, and the direction along the horizontal plane is represented by the X axis and the Y axis. The X axis, the Y axis, and the Z axis are orthogonal to each other.

[0021] like Figure 1 As shown, the printing device 11 may include a housing 12 , a liquid ejecting head 13 , and a supporting portion 14 .

[0022] The support portion 14 supports the medium 16 to be transported.

[0023] The liquid ejection head 13 has a nozzle 17. The liquid ejection head 13 can eject liquid. The liquid ejection head 13 ejects liquid from the nozzle 17 onto the medium 16 supported on the support portion 14, thereby printing on the medium 16. The liquid ejection head 13 may be a serial type in which the liquid ejection head 13 ejects liquid while moving to perform printing. The liquid ejection head 13 may also be a line type in which the liquid ejection head 13 is arranged in a strip in the width direction of the medium 16 and ejects liquid onto the medium 16 being transported to perform printing.

[0024] The printing device 11 may include a supply flow channel 19 , a supply needle 20 , a tray 21 , and a mounting portion 22 .

[0025] The supply flow path 19 supplies liquid from a liquid storage bag 23 storing liquid to the liquid ejecting head 13 .

[0026] The supply needle 20 is provided at the upstream end of the supply flow channel 19 .

[0027] The tray 21 is detachably mounted on the mounting portion 22. The tray 21 supports the liquid storage bag 23. That is, the liquid storage bag 23 is placed on the tray 21. The liquid storage bag 23 is connected to the supply needle 20 by mounting the tray 21 on the mounting portion 22 while being placed on the tray 21.

[0028] The liquid storage bag 23 includes a bag body 24 and a supply unit 25. The liquid storage bag 23 may include an auxiliary unit 26.

[0029] The bag body 24 can contain liquid and is, for example, a gusseted type having a fabric 29 with folds 28 .

[0030] The supply unit 25 supplies the liquid contained in the bag 24 to the outside. The auxiliary unit 26 assists the connection between the supply unit 25 and the supply needle 20. The auxiliary unit 26 can position the supply unit 25 relative to the tray 21, thereby facilitating the connection between the supply unit 25 and the supply needle 20 when the tray 21 is installed.

[0031] like Figure 2 As shown, the bag body 24 is formed of a film 31. The bag body 24 may be formed with one or more films 31 to form a storage space 32 capable of storing liquid.

[0032] The film 31 may also include a first base layer 33, a first adhesive layer 34, a second black coating layer 35, a third base layer 36, a second adhesive layer 37, a first black coating layer 38 as an example of a black coating layer, and a second base layer 39, which are sequentially stacked from the storage space 32 side. Each layer is stacked in the thickness direction of the film 31. In the present embodiment, when the film 31 is in a flat posture, the surface of each layer perpendicular to the thickness direction is also referred to as a layer surface. In the film 31 of the present embodiment, the storage space 32 side is also referred to as the inner side, and the side opposite to the storage space 32 is also referred to as the outer side.

[0033] The first base layer 33 may also be located at the innermost side. The inner layer of the first base layer 33 is in contact with the liquid contained in the storage space 32. The first base layer 33 may also be formed of polyethylene. Polyethylene has resistance to, for example, ultraviolet curing ink as an example of a liquid. That is, since polyethylene limits the penetration of ultraviolet rays, it is possible to protect liquids such as ultraviolet curing ink contained in the storage space 32. Polyethylene is relatively excellent in heat sealing properties. Therefore, by forming the innermost first base layer 33 of polyethylene and bonding the first base layers 33 to each other using heat, the bag body 24 can be easily formed.

[0034] The first adhesive layer 34 may also bond the first base layer 33 and the second black coating layer 35 together. The first adhesive layer 34 of this embodiment bonds the outer surface of the first base layer 33 and the second black coating layer 35 together. The first adhesive layer 34 bonds the third base layer 36 formed with the second black coating layer 35 to the first base layer 33 with the second black coating layer 35 as the inner side.

[0035] The second black coating layer 35 is located between the first base layer 33 and the third base layer 36. Since the third base layer 36 is located between the first base layer 33 and the second base layer 39, it can be said that the second black coating layer 35 is located between the first base layer 33 and the second base layer 39. The second black coating layer 35 of this embodiment is formed by a black colorant that covers the entire surface of the inner side of the third base layer 36. The second black coating layer 35 may be formed on the entire surface of the third base layer 36 or on a surface except for a part of the area such as the end of the third base layer 36.

[0036] The third base layer 36 may be located outside the first base layer 33. The third base layer 36 may be located between the first base layer 33 and the second base layer 39. The third base layer 36 may be made of nylon. Nylon is resistant to oil and thorns.

[0037] The second adhesive layer 37 may also adhere the third base layer 36 and the first black coating layer 38 together. The second adhesive layer 37 of this embodiment adheres the outer surface of the third base layer 36 and the first black coating layer 38 together. The second adhesive layer 37 adheres the second base layer 39 formed with the first black coating layer 38 to the third base layer 36 with the first black coating layer 38 as the inner side. The first adhesive layer 34 and the second adhesive layer 37 may also be formed using a polyurethane adhesive, an ester adhesive, a vinyl adhesive, an epoxy adhesive, or the like.

[0038] The first black coating layer 38 is located between the second base layer 39 and the third base layer 36. Since the third base layer 36 is located between the first base layer 33 and the second base layer 39, the first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 of this embodiment is formed by a black colorant that covers the entire surface of the inner side of the second base layer 39. The first black coating layer 38 may be formed on the entire surface of the second base layer 39 or on a surface except for a part of the area such as the end of the second base layer 39.

[0039] The first black coating layer 38 and the second black coating layer 35 may be formed by the same colorant or different colorants. The black colorant may include, for example, carbon, iron black, pine smoke, etc. The black colorant may also be formed by mixing a plurality of colorants of different colors. The black colorant may also be formed on the layer by coating a plurality of colorants of different colors on the layer of the second base layer 39 or the third base layer 36.

[0040] The first black coating layer 38 and the second black coating layer 35 may also be formed by applying a coating containing a black colorant on the layer surface. The first black coating layer 38 and the second black coating layer 35 may also be formed by printing. For example, the first black coating layer 38 and the second black coating layer 35 may also be formed by coating the layer surface with ink containing a black colorant.

[0041] The first black coating layer 38 and the second black coating layer 35 may have the same or different absorbance and thickness. Even when the first black coating layer 38 and the second black coating layer 35 are formed using the same colorant, the absorbance can be increased by coating the coating containing the colorant.

[0042] The second base layer 39 may also be located on the outside of the first base layer 33. The outer surface of the second base layer 39 may also be in contact with the external air. The second base layer 39 may also be formed by polyethylene terephthalate on the surface of which aluminum oxide is vapor-deposited. Aluminum oxide may also cover at least one of the outer surface and the inner surface of polyethylene terephthalate. Polyethylene terephthalate on which aluminum oxide is vapor-deposited has a barrier property against oxygen and water vapor, etc., and resistance against impact and vibration.

[0043] The role of implementation

[0044] The operation of this embodiment will be described.

[0045] The liquid storage bag 23 stores liquid in the storage space 32. The bag body 24 forming the storage space 32 is formed of a film 31. The film 31 shields light from the outside by the first black coating layer 38 and the second black coating layer 35 to protect the stored liquid.

[0046] Effects of implementation methods

[0047] The effects of this embodiment will be described.

[0048] (1) The film 31 constituting the bag body 24 has a first black coating layer 38. The first black coating layer 38 can be formed by coating the second base layer 39 with a colorant. Therefore, compared with the case of using a metal film or the case of using a colored second base layer, the increase in cost can be suppressed. The black colorant is superior in light-shielding property compared with colorants of other colors. Therefore, the light-shielding property can be ensured while suppressing the increase in cost.

[0049] (2) The film 31 has the first black coating layer 38 and the second black coating layer 35. That is, since the film 31 has a plurality of black coating layers, the light shielding property can be improved compared to the case where the film 31 has a single black coating layer.

[0050] (3) Polyethylene restricts the transmission of ultraviolet rays Since the first base layer 33 is made of polyethylene, the ultraviolet rays that pass through the bag body 24 can be reduced.

[0051] (4) Polyethylene terephthalate on which aluminum oxide is vapor-deposited has resistance to impact and vibration Since the second base layer 39 located on the outside is formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited, the strength of the bag body 24 can be improved.

[0052] (5) Nylon is resistant to punctures. Since the third base layer 36 located between the first base layer 33 and the second base layer 39 is formed of nylon, the possibility of holes in the bag body 24 can be reduced.

[0053] Change Example

[0054] This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be combined and implemented with each other within the scope of no technical contradiction.

[0055] First change example

[0056] like Figure 3 As shown in the figure, the film 31 may also have a second base layer 39, a first black coating layer 38, a first adhesive layer 34, and a first base layer 33 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene terephthalate or nylon on which aluminum oxide is vapor-deposited. The second base layer 39 may also be formed of polyethylene. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the outer side of the second base layer 39.

[0057] Second modification example

[0058] like Figure 4As shown in FIG. 1 , the film 31 may also have a first base layer 33, a first adhesive layer 34, a first black coating layer 38, and a second base layer 39 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene. The second base layer 39 may be formed of polyethylene terephthalate or nylon on which aluminum oxide is vapor-deposited. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the inner side of the second base layer 39.

[0059] The third modification example

[0060] like Figure 5 As shown in the figure, in addition to the structure of the second modified example, the film 31 may further include a second black coating layer 35. That is, the film 31 may include a first base layer 33, a second black coating layer 35, a first adhesive layer 34, a first black coating layer 38, and a second base layer 39 in order from the storage space 32 side. The first black coating layer 38 and the second black coating layer 35 are located between the first base layer 33 and the second base layer 39. The second black coating layer 35 may also be formed on the outer side of the first base layer 33.

[0061] Fourth Modification

[0062] like Figure 6 As shown, the film 31 may include a first base layer 33, a first adhesive layer 34, a first black coating layer 38, a second base layer 39, a second black coating layer 35, a second adhesive layer 37, and a third base layer 36 in order from the storage space 32 side. The second base layer 39 may be located between the first base layer 33 and the third base layer 36. The third base layer 36 may be located outside the first base layer 33 and the second base layer 39. The first base layer 33 may be formed of polyethylene. The second base layer 39 may be formed of nylon. The third base layer 36 may be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The first black coating layer 38 and the second black coating layer 35 may be formed on the second base layer 39. That is, the first black coating layer 38 may be formed on the inner layer of the second base layer 39. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The second black coating layer 35 may be formed on the outer layer of the second base layer 39.

[0063] Fifth Modification

[0064] like Figure 7As shown, the film 31 may also have a second base layer 39, a first black coating layer 38, a first adhesive layer 34, a third base layer 36, a second black coating layer 35, a second adhesive layer 37, and a first base layer 33 in order from the storage space 32 side. The second base layer 39 and the third base layer 36 may also be located on the inner side compared to the first base layer 33. That is, the second base layer 39 and the third base layer 36 may also be located between the first base layer 33 and the storage space 32. The first base layer 33 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The second base layer 39 may also be formed of polyethylene. The third base layer 36 may also be formed of nylon. The first black coating layer 38 and the second black coating layer 35 are located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the inner side of the second base layer 39. The second black coating layer 35 may also be formed on the outer side of the third base layer 36.

[0065] Sixth Amendment

[0066] like Figure 8 As shown, the film 31 may also have a third base layer 36, a second black coating layer 35, a first adhesive layer 34, a first base layer 33, a second adhesive layer 37, a first black coating layer 38, and a second base layer 39 in order from the storage space 32 side. The first base layer 33 may also be located between the second base layer 39 and the third base layer 36. The second base layer 39 may also be located on the outside compared to the first base layer 33. The first base layer 33 may also be formed of nylon. The second base layer 39 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The third base layer 36 may also be formed of polyethylene. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the inner layer of the second base layer 39. The second black coating layer 35 may also be formed on the outer layer of the third base layer 36.

[0067] Seventh Amendment

[0068] like Fig. 9 As shown, the film 31 may also have a first base layer 33, a first adhesive layer 34, a third base layer 36, a second adhesive layer 37, a first black coating layer 38 and a second base layer 39 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene. The second base layer 39 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The third base layer 36 may also be formed of nylon. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the inner side of the second base layer 39.

[0069] Eighth Amendment

[0070] like Fig.10As shown, the film 31 may also have a third base layer 36, a first adhesive layer 34, a second base layer 39, a first black coating layer 38, a second adhesive layer 37 and a first base layer 33 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The second base layer 39 may also be formed of nylon. The third base layer 36 may also be formed of polyethylene. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the outer side of the second base layer 39.

[0071] Ninth Amendment

[0072] like Fig.11 As shown, the film 31 may also have a first base layer 33, a first adhesive layer 34, a first black coating layer 38, a second base layer 39, a second adhesive layer 37 and a third base layer 36 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene. The second base layer 39 may also be formed of nylon. The third base layer 36 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the inner side of the second base layer 39.

[0073] Tenth Amendment

[0074] like Fig.12 As shown, the film 31 may also have a second base layer 39, a first black coating layer 38, a first adhesive layer 34, a third base layer 36, a second adhesive layer 37 and a first base layer 33 in order from the storage space 32 side. The first base layer 33 may also be formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited. The second base layer 39 may also be formed of polyethylene. The third base layer 36 may also be formed of nylon. The first black coating layer 38 is located between the first base layer 33 and the second base layer 39. The first black coating layer 38 may also be formed on the outer side of the second base layer 39.

[0075] Other changes

[0076] In the above embodiment, the second black coating layer 35 may be formed on the outer side of the third base layer 36 .

[0077] In the fifth modification example, the second black coating layer 35 may be formed on the inner side of the third base layer 36 .

[0078] The film 31 may also have three or more black coating layers. For example, in the above embodiment, the black coating layer may be formed on at least one of the outer layer of the first base layer 33 and the outer layer of the third base layer 36. In the fourth modification, the black coating layer may be formed on at least one of the outer layer of the first base layer 33 and the inner layer of the third base layer 36. In the fifth modification, the black coating layer may be formed on at least one of the inner layer of the first base layer 33 and the inner layer of the third base layer 36.

[0079] In the above embodiment and the above modifications, the first base layer 33, the second base layer 39 and the third base layer 36 may be formed of any resin. For example, the first base layer 33 to the third base layer 36 may be formed of polyethylene terephthalate, polyvinyl alcohol, polypropylene, polystyrene, etc.

[0080] The film 31 may be configured not to have at least one of the first adhesive layer 34 and the second adhesive layer 37. For example, the first base layer 33 may be formed by pressing a molten resin, which is a material of the first base layer 33, onto the first black coating layer 38 formed on the second base layer 39.

[0081] The liquid stored in the liquid storage bag 23 can be any substance in a liquid phase, and is set to include a fluid body such as a liquid with high or low viscosity, a sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals, and metal melts. The liquid is set to include not only a liquid as a state of a substance, but also a substance obtained by dissolving, dispersing, or mixing particles of functional materials composed of solids such as pigments or metal particles in a solvent. As representative examples of liquids, inks or liquid crystals can be cited. The so-called ink is set to include various liquid compositions such as general water-based inks and oil-based inks, as well as colloid inks, hot melt adhesive inks, etc.

[0082] Notes

[0083] Hereinafter, the technical ideas and the effects thereof grasped from the above-mentioned embodiments and modified examples will be described.

[0084] (A) A liquid storage bag comprises: a bag body capable of storing liquid; a supply portion for supplying the liquid stored in the bag body to the outside, wherein the bag body is formed by a film, and the film has: a first base layer; a second base layer; a black coating layer located between the first base layer and the second base layer, and the black coating layer is formed by a black colorant that coats the entire surface of the second base layer.

[0085] According to this structure, the film constituting the bag body has a black coating layer. The black coating layer can be formed by coating the layer of the second base layer with a colorant. Therefore, compared with the case of using a metal film or the case of using a colored second base layer, the increase in cost can be suppressed. The black colorant is superior in light-shielding property compared with colorants of other colors. Therefore, the light-shielding property can be ensured while suppressing the increase in cost.

[0086] (B) In the liquid storage bag, when the black coating layer is a first black coating layer, the film may include a third base layer and a second black coating layer formed of a black colorant coating the entire surface of the third base layer.

[0087] According to this structure, the film has the first black coating layer and the second black coating layer. That is, since the film has a plurality of black coating layers, the light shielding property can be improved compared to the case where the film has a single black coating layer.

[0088] (C) In the liquid storage bag, the first base layer may be formed of polyethylene.

[0089] Polyethylene restricts the transmission of ultraviolet rays. According to this structure, since the first base layer is formed of polyethylene, it is possible to reduce the ultraviolet rays that pass through the bag body.

[0090] (D) In ​​the liquid storage bag, the second base layer may be located outside the first base layer and may be formed of polyethylene terephthalate having aluminum oxide vapor-deposited on the surface thereof.

[0091] Polyethylene terephthalate on which aluminum oxide is vapor-deposited has resistance to impact and vibration. According to this structure, since the second base layer located on the outside is formed of polyethylene terephthalate on which aluminum oxide is vapor-deposited, the strength of the bag body can be improved.

[0092] (E) In the liquid storage bag, the third base layer may be located between the first base layer and the second base layer and may be formed of nylon.

[0093] Nylon has resistance to thorns. According to this structure, since the third base layer located between the first base layer and the second base layer is formed of nylon, the possibility of holes in the bag body can be reduced.

[0094] Explanation of symbols

[0095] 11…printing device; 12…housing; 13…liquid ejecting head; 14…supporting portion; 16…medium; 17…nozzle; 19…supply channel; 20…supply needle; 21…tray; 22…mounting portion; 23…liquid storage bag; 24…bag body; 25…supply portion; 26…auxiliary portion; 28…crease; 29…fabric; 31…film; 32…storage space; 33…first base layer; 34…first adhesive layer; 35…second black coating layer; 36…third base layer; 37…second adhesive layer; 38…first black coating layer; 39…second base layer.

Claims

1. A liquid storage bag, characterized in that: have: a bag body capable of containing liquid; a supply unit that supplies the liquid contained in the bag to the outside, The bag body is formed by a film, The film has: First grassroots level; Second base layer; A first black coating layer is located between the first base layer and the second base layer, The first black coating layer is formed by coating the entire surface of the second base layer with a black colorant. The film also has: The third grassroots level; A second black coating layer is formed by coating the entire surface of the third base layer with a black colorant, The black colorant includes carbon, iron black, or pine smoke.

2. The liquid storage bag according to claim 1, characterized in that: The first base layer is formed of polyethylene.

3. The liquid storage bag according to claim 1, characterized in that: The second base layer is located on the outer side than the first base layer, and is formed of polyethylene terephthalate on the surface of which aluminum oxide is vapor-deposited.

4. The liquid storage bag according to claim 1, wherein: The third base layer is located between the first base layer and the second base layer and is formed of nylon.

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