Fluid package and fluid package unit

Abstract

To provide a fluid package capable of reducing interlayer poor adhesion caused by a print layer and ultraviolet curing of a fluid.SOLUTION: A fluid package 10 includes: a bag-shaped pouch 12 for containing a fluid in a storage chamber 11 defined by a film 20; and a spout 13 communicating with the storage chamber. The film has: an outer layer 25; an inner layer 23 arranged closer to the storage chamber than the outer layer in a direction in which the outer layer is stacked; a light intercepting layer 21 for intercepting ultraviolet rays, which is provided between the outer layer and the inner layer in the stacking direction, and which has an outer peripheral edge provided at a position inside of an outer peripheral edge of the outer layer and an outer peripheral edge of the inner layer in a direction orthogonal to the stacking direction, the position being the same as an outer peripheral edge of the storage chamber or being outside of the outer peripheral edge of the storage chamber, and which covers the whole of the storage chamber; and an adhesion layer 24 for bonding the outer layer and the inner layer with the light intercepting layer disposed therebetween, the adhesion layer containing a directly-bonding region 28 for directly bonding the outer layer and the inner layer at a position of surrounding the light intercepting layer.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fluid package and a fluid packaging unit. [Background technology]

[0002] Conventionally, as a fluid package, for example, a packaging bag is known, as described in Patent Document 1. A concealed area is provided in a part of this packaging bag. This concealed area has a base layer, a picture-printed layer laminated on the inside of the base layer, and an intermediate layer bonded to the base layer by an adhesive layer with the picture-printed layer sandwiched between the intermediate layer and the base layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-149454 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the packaging bag of Patent Document 1, the picture-printed layer is smaller than the base material layer and the intermediate layer, and therefore the base material layer and the intermediate layer are directly bonded to each other outside the picture-printed layer, reducing a decrease in adhesive strength between the base material layer and the intermediate layer caused by the picture-printed layer.

[0005] However, when contents such as ultraviolet-curable ink are placed in the internal space of the packaging bag, the packaging bag needs to have light-shielding properties to prevent the contents from hardening. In contrast, even if the picture-printed layer of the packaging bag in Patent Document 1 had light-shielding properties, the picture-printed layer is smaller than the internal space of the packaging bag, and therefore cannot sufficiently block light from reaching the contents.

[0006] In view of the above, an object of the present invention is to provide a fluid package and a fluid package unit that can reduce poor adhesion between layers due to printed layers and ultraviolet curing of fluid. [Means for solving the problem]

[0007] The fluid package of the present invention comprises a bag-shaped pouch that contains a fluid in a storage chamber defined by a film, and a spout that communicates with the storage chamber, wherein the film has an outer layer, an inner layer that is arranged on the storage chamber side of the outer layer in a stacking direction with the outer layer, a light-shielding layer that is arranged between the outer layer and the inner layer in the stacking direction and has an outer peripheral edge that is located inside the outer peripheral edge of the outer layer and the outer peripheral edge of the inner layer in a direction perpendicular to the stacking direction and is located at the same position as the outer peripheral edge of the storage chamber or outside the outer peripheral edge of the storage chamber, covers the entire storage chamber, and blocks ultraviolet rays, and an adhesive layer that bonds the outer layer and the inner layer together via the light-shielding layer, and includes a direct bonding area that directly bonds the outer layer and the inner layer at a position surrounding the light-shielding layer.

[0008] The fluid package unit of the present invention comprises a fluid package, a winding mechanism for winding up the pouch, and an attachment section equipped with the winding mechanism and capable of attaching and detaching the fluid package, wherein the pouch has, in an area surrounding the periphery of the storage chamber, an insertion port through which the spout is inserted, and a film welding section in which the films facing each other in the stacking direction are welded together across the storage chamber, and the film welding section has a triangular bottom welding section arranged between the storage chamber and the insertion port in a first direction parallel to the orthogonal direction, with the storage chamber and the light-shielding layer sandwiched between the film welding section and the insertion port, and the pouch is wound up by the winding mechanism in a direction from the bottom welding section toward the insertion port. Effect of the Invention

[0009] According to the present invention, it is possible to provide a fluid package and a fluid package unit that can reduce poor adhesion between layers due to printed layers and ultraviolet curing of fluid. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic diagram of a fluid package as viewed from the front. [Diagram 2] FIG. 2 is a cross-sectional view of the pouch taken along a plane perpendicular to the up-down direction. [Diagram 3] Figure 3(a) is a cross-sectional view of the first wall, and Figure 3(b) is a cross-sectional view of the second wall. [Figure 4] FIG. 2 is a schematic diagram of a fluid package as viewed from the front. [Diagram 5] FIG. 2 is a schematic view of the fluid packaging unit as viewed from the right side. [Figure 6] Figure 6(a) is a schematic diagram of a film having a first indicator and a second indicator as viewed from the front, and Figure 6(b) is a schematic diagram of a fluid package using the film of Figure 6(a) as viewed from the front. [Figure 7] Figure 7(a) is a schematic diagram of a film having a first longitudinal indicator, a first lateral indicator, a second longitudinal indicator, and a second lateral indicator, viewed from the front, and Figure 7(b) is a schematic diagram of a fluid package using the film of Figure 7(a), viewed from the front. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding elements are denoted by the same reference numerals throughout the drawings.

[0012] (Embodiment) <Fluid package configuration> As shown in Fig. 1, the fluid package 10 is a container for storing a fluid such as ink, drinking water, liquid detergent, and edible oil. As shown in Fig. 1 and Fig. 2, the fluid package 10 includes a bag-shaped pouch 12 that stores a fluid in a storage chamber 11 defined by a film 20, and a spout 13 that communicates with the storage chamber 11. As shown in Fig. 3(a) and Fig. 3(b), the film 20 includes an outer layer 25 and an inner layer 23 that is disposed closer to the storage chamber 11 than the outer layer 25 in the lamination direction with the outer layer 25.

[0013] The stacking direction in which the outer layer 25 and the inner layer 23 are stacked is referred to as the front-rear direction. A first direction intersecting (e.g., perpendicular to) the front-rear direction is referred to as the up-down direction. A second direction intersecting (e.g., perpendicular to) the front-rear direction and the left-right direction is referred to as the left-right direction. However, the arrangement of the fluid package 10 is not limited to these directions.

[0014] Pouch 12 is, for example, pentagonal in shape with a length L1 in the up-down direction and a length W in the left-right direction. Pouch 12 has a first wall 20f and a second wall 20s that sandwich storage chamber 11 between them in the front-rear direction. Pouch 12 has, in a range surrounding storage chamber 11 in a direction perpendicular to the up-down direction, an insertion opening 15 through which spout 13 is inserted, a film welding part 30 that welds first wall 20f and second wall 20s, and a spout welding part 36 that welds first wall 20f and second wall 20s to spout 13.

[0015] The insertion opening 15 is disposed at the center of the pouch 12 in the left-right direction and is sandwiched between the film welding portion 30. The insertion opening 15 is sandwiched between the first wall 20f and the second wall 20s in the front-rear direction. In the up-down direction, the lower end of the insertion opening 15 is connected to the upper opening of the storage chamber 11, extends upward from the storage chamber 11, and has an open upper end.

[0016] Spout 13 has a tubular shape such as a cylinder or a square tube, has a communication passage 14 therein, and is formed of, for example, resin or the like. The lower part of spout 13 is inserted into insertion opening 15 of pouch 12 so that communication passage 14 extends in the vertical direction, and protrudes upward from the upper end of pouch 12. The lower part of spout 13 is in close contact with pouch 12 by spout welded part 36, and the space between spout 13 and pouch 12 is sealed. The inside of storage chamber 11 in pouch 12 is communicated with the outside of storage chamber 11 via communication passage 14, and when a fluid is discharged from storage chamber 11, the fluid passes through insertion opening 15.

[0017] The film 20 is flexible and includes a first wall 20f and a second wall 20s disposed behind the first wall 20f. The first wall 20f and the second wall 20s have the same shape and area as each other and are disposed so as to overlap each other.

[0018] As shown in Figure 3(a), the first wall 20f has a first inner layer 23f which is the inner layer 23, a first light-shielding layer 21f which is the light-shielding layer 21 laminated on the first inner layer 23f via a first adhesive layer 24f which is the adhesive layer 24, a first display printed layer 22f which is the display printed layer 22 laminated on the first light-shielding layer 21f, and a first outer layer 25f which is the outer layer 25 laminated on the first display printed layer 22f.

[0019] The first inner layer 23f is disposed rearward of the first outer layer 25f in the front-rear direction and on the inner side of the pouch 12 closer to the storage chamber 11 than the first outer layer 25f, and constitutes the inner surface of the pouch 12 and the inner surface of the first wall 20f. The first outer layer 25f constitutes the outer surface of the pouch 12 and the outer surface of the first wall 20f.

[0020] The first inner layer 23f is transparent, has, for example, a rectangular shape, and has a plurality of layers. In the example of FIG. 3(a), the first inner layer 23f has a first layer 23a, a second layer 23c laminated on the first layer 23a via an adhesive layer 23b, and a third layer 23e laminated on the second layer 23c via an adhesive layer 23d. The first layer 23a is disposed on the inside of the third layer 23e in the first inner layer 23f, and constitutes the inner surface of the pouch 12 and the inner surface of the first wall 20f. The order in which the layers are laminated in the first inner layer 23f is not limited to this order.

[0021] The first layer 23a is made of, for example, polyethylene resin so that the first wall 20f and the second wall 20s can be welded together. The second layer 23c is made of, for example, nylon resin so that the film 20 has flexibility. The third layer 23e is made of, for example, PET resin so that it blocks the passage of gas. The first inner layer 23f may be composed of a single layer.

[0022] The adhesive layer 23b, the adhesive layer 23d, and the first adhesive layer 24f are made of, for example, a resin having adhesive properties, and for example, an acrylic resin, an epoxy resin, or the like can be used.

[0023] The first adhesive layer 24f is, for example, transparent, has an area larger than that of the first light-shielding layer 21f and that of the first display printed layer 22f, and has the same shape and area as the first inner layer 23f and the first outer layer 25f. In a direction perpendicular to the front-rear direction, the outer peripheral edge 24fp of the first adhesive layer 24f surrounds the outer peripheral edge 21fp of the first light-shielding layer 21f and the outer peripheral edge 22fp of the first display printed layer 22f, and coincides with the outer peripheral edge 23fp of the first inner layer 23f and the outer peripheral edge 25f of the first outer layer 25f, forming the outer peripheral edge 12p of the pouch 12. In the following, a case will be described in which the outer peripheral edge 21fp of the first light-shielding layer 21f and the outer peripheral edge 22fp of the first display printed layer 22f coincide with each other. However, the outer periphery 22fp of the first display printed layer 22f may surround the periphery of the outer periphery 21fp of the first light-shielding layer 21f.

[0024] Therefore, the first adhesive layer 24f bonds the first inner layer 23f and the first light-shielding layer 21f at the outer periphery 21fp of the first light-shielding layer 21f and on the inside of the outer periphery 21fp in the direction perpendicular to the front-rear direction. Also, the first adhesive layer 24f bonds the first inner layer 23f and the first outer layer 25f on the outside of the outer periphery 21fp of the first light-shielding layer 21f, forming a direct adhesive region 28.

[0025] Thus, the direct adhesion region 28 is a region in the film 20 where the inner layer 23 and the outer layer 25 are directly adhered to each other by the adhesive layer 24. The inner layer 23, the outer layer 25, and the adhesive layer 24 are all transparent. The direct adhesion region 28 does not include the light-shielding layer 21 and the display print layer 22. Therefore, the direct adhesion region 28 is transparent. Note that the term "transparent" means that the film has light transmittance, and includes translucent and colored transparent.

[0026] The first light-shielding layer 21f is a layer that blocks ultraviolet rays and has a higher ultraviolet ray blocking rate than other layers. This blocking rate is determined in advance according to the performance required for the fluid. For example, the first light-shielding layer 21f is a printed layer formed by adhering an ink of a color with a high ultraviolet ray blocking rate, such as black, to the first adhesive layer 24f. The first light-shielding layer 21f may be, for example, a metal foil such as aluminum, or a metal layer of a metal deposition film formed by depositing a metal such as aluminum on a thin film of resin or the like.

[0027] 1, the outer peripheral edge 21fp of the first light-shielding layer 21f is located inside the outer peripheral edge 12p of the pouch 12 in a direction perpendicular to the front-rear direction, and is located at the same position as the outer peripheral edge 11p of the storage chamber 11 or outside the outer peripheral edge 11p of the storage chamber 11. As a result, the area of ​​the first light-shielding layer 21f is the same as or larger than the area of ​​the front side surface of the storage chamber 11, and covers the entire front side of the storage chamber 11.

[0028] 3(a), the first display printed layer 22f is a layer for displaying information, and the information includes, for example, information showing the contents of the fluid contained in the containing chamber 11. The first display printed layer 22f is disposed at a position farther from the containing chamber 11 than the first light-shielding layer 21f in the front-rear direction, and is laminated on the first light-shielding layer 21f to cover at least a part of the first light-shielding layer 21f. For example, the first display printed layer 22f is a printed layer, and is formed by adhering an ink of a color different from that of the first light-shielding layer 21f to the first light-shielding layer 21f.

[0029] The first outer layer 25f covers the first display printed layer 22f at the outer periphery 22fp of the first display printed layer 22f and on the inside of the outer periphery 22fp in the direction perpendicular to the front-rear direction, thereby protecting the first display printed layer 22f from the outside. The first outer layer 25f is made of a transparent resin so that the first display printed layer 22f can be seen from the outside of the pouch 12. The first outer layer 25f covers the first adhesive layer 24f on the outside of the first display printed layer 22f in the direction perpendicular to the front-rear direction, thereby protecting the first adhesive layer 24f from the outside.

[0030] As shown in Figure 3(b), the second wall 20s has a second inner layer 23s which is the inner layer 23, a second light-shielding layer 21s which is the light-shielding layer 21 laminated on the second inner layer 23s via a second adhesive layer 24s which is the adhesive layer 24, a second display printed layer 22s which is the display printed layer 22 laminated on the second light-shielding layer 21s, and a second outer layer 25s which is the outer layer 25 laminated on the second display printed layer 22s.

[0031] The second inner layer 23s has a similar configuration to the first inner layer 23f, the second adhesive layer 24s has a similar configuration to the first adhesive layer 24f, the second light-shielding layer 21s has a similar configuration to the first light-shielding layer 21f, the second display printed layer 22s has a similar configuration to the first display printed layer 22f, and the second outer layer 25s has a similar configuration to the first outer layer 25f. The first inner layer 23f and the second inner layer 23s may be referred to as the inner layer 23, the first adhesive layer 24f and the second adhesive layer 24s may be referred to as the adhesive layer 24, the first light-shielding layer 21f and the second light-shielding layer 21s may be referred to as the light-shielding layer 21, the first display printed layer 22f and the second display printed layer 22s may be referred to as the display printed layer 22, and the first outer layer 25f and the second outer layer 25s may be referred to as the outer layer 25.

[0032] 1, the first light-shielding layer 21f and the second light-shielding layer 21s have the same shape and area. In the pouch 12, the outer periphery 21fp of the first light-shielding layer 21f and the outer periphery 21sp of the second light-shielding layer 21s overlap each other and surround the outer periphery 11p of the storage chamber 11. As a result, the first light-shielding layer 21f and the second light-shielding layer 21s cover the entire storage chamber 11.

[0033] <Direct bonding area, spout welded area and film welded area> 4, spout welded part 36 and film welded part 30 are provided on pouch 12 so as to surround the periphery of storage chamber 11, sealing storage chamber 11. Spout welded part 36 is a part formed by welding the outer peripheral surface of the lower part of spout 13 inserted into insertion opening 15 to the inner surface of first wall 20f and the inner surface of second wall 20s of pouch 12.

[0034] The film welded portion 30 is formed by welding the first wall 20f and the second wall 20s, and is, for example, U-shaped. The film welded portion 30 has a right side welded portion 31, a left side welded portion 32, a bottom side welded portion 33, a right top side welded portion 34, and a left top side welded portion 35. The right side welded portion 31 is provided to the right of the storage chamber 11 in the pouch 12, and the left side welded portion 32 is provided to the left of the storage chamber 11 in the pouch 12. The right side welded portion 31 and the left side welded portion 32 are arranged with the storage chamber 11 between them in the left-right direction, and are parallel to each other and extend in the up-down direction.

[0035] The bottom welded portion 33 is provided below the storage chamber 11 in the pouch 12. The upper end of the bottom welded portion 33 is connected to the lower end of the right side welded portion 31 and the lower end of the left side welded portion 32. The bottom welded portion 33 is, for example, triangular in shape and has a downwardly pointed shape such that the left-right length decreases downward from the storage chamber 11. The length D1 of the bottom welded portion 33 in the up-down direction is longer than the length W of the right side welded portion 31 and the length W of the left side welded portion 32 in the left-right direction.

[0036] Right top welded portion 34 is provided above storage chamber 11 and to the right of insertion opening 15, and left top welded portion 35 is provided above storage chamber 11 and to the left of insertion opening 15. Right top welded portion 34 extends to the right from the right end of insertion opening 15, and its lower end is connected to the upper end of right side welded portion 31. Left top welded portion 35 extends to the left from the left end of insertion opening 15, and its lower end is connected to the upper end of left side welded portion 32.

[0037] The direct adhesion region 28 is provided outside the outer peripheral edge 21p of the light-shielding layer 21 and inside the outer peripheral edge 12p of the pouch 12 in the direction perpendicular to the front-rear direction. The outer peripheral edge 21p of the light-shielding layer 21 is provided between the lower edge 36p of the spout welding portion 36, which is the outer peripheral edge 11p of the storage chamber 11, and the inner peripheral edge 30p of the film welding portion 30, and the outer peripheral edge 12p of the pouch 12. For this reason, the direct adhesion region 28 is provided outside the outer peripheral edge 21p of the light-shielding layer 21 of the spout welding portion 36 and the film welding portion 30.

[0038] Bottom side weld 33 of film weld 30 is located below light-shielding layer 21, and is formed by direct adhesion region 28. The bottom end of light-shielding layer 21 is located between the top and bottom ends of bottom side weld 33, and bottom side weld 33 may partially include light-shielding layer 21.

[0039] Further, a window portion 37 is provided in spout welding portion 36, and in right top welding portion 34 and left top welding portion 35 of film welding portion 30. Window portion 37 is, for example, rectangular, and is provided so as to span spout welding portion 36 and film welding portion 30 in the left-right direction. Note that window portion 37 may be provided in at least either spout welding portion 36 or film welding portion 30.

[0040] The window portion 37 is disposed above the storage chamber 11 in the vertical direction, and extends downward from the upper end of the pouch 12. An upper portion 37a of the window portion 37 is formed of a transparent direct bonding region 28. Therefore, in the vertical direction, the upper ends of the direct bonding region 28 and the window portion 37 both coincide with the upper end of the pouch 12, and the lower end of the direct bonding region 28 is located between the upper and lower ends of the window portion 37. A lower portion 37b of the window portion 37 is formed of the inner layer 23 and the outer layer 25, and does not include the light-shielding layer 21, the display print layer 22, and the adhesive layer 24. Therefore, the lower portion 37b of the window portion 37 is more transparent than the upper portion 37a of the window portion 37.

[0041] In such a fluid package 10, the film 20 has a transparent outer layer 25, a transparent inner layer 23 arranged on the storage chamber 11 side of the outer layer 25 in the stacking direction (e.g., the front-to-rear direction) with the outer layer 25, a light-shielding layer 21 arranged between the outer layer 25 and the inner layer 23 in the front-to-rear direction, and having an outer peripheral edge arranged in a position inside the outer peripheral edge of the outer layer 25 and the outer peripheral edge of the inner layer 23 in a direction perpendicular to the front-to-rear direction and at the same position as the outer peripheral edge of the storage chamber 11 or at a position outside the outer peripheral edge of the storage chamber 11, covering the entire storage chamber 11 and blocking ultraviolet rays, and an adhesive layer 24 including a direct adhesive region 28 that bonds the outer layer 25 and the inner layer 23 together across the light-shielding layer 21 and directly bonds the outer layer 25 and the inner layer 23 at a position surrounding the light-shielding layer 21.

[0042] According to this, a direct bonding region 28 is provided around the periphery of the light-shielding layer 21, where the inner layer 23 and the outer layer 25 are bonded with the adhesive layer 24. This makes it possible to reduce poor adhesion between the layers of the film 20 caused by sandwiching the light-shielding layer 21 between the inner layer 23 and the outer layer 25. In addition, since the light-shielding layer 21 covers the entire storage chamber 11, it is possible to block light from the fluid in the storage chamber 11 and reduce deterioration of the fluid caused by ultraviolet rays.

[0043] Furthermore, through the transparent direct bonding region 28, the presence or absence of leakage of fluid from the storage chamber 11 can be easily confirmed visually. Also, the area of ​​the light-shielding layer 21 is reduced, and an increase in the rigidity of the pouch 12 caused by the light-shielding layer 21 is reduced. Therefore, when the pouch 12 is rolled up, the pouch 12 can be easily rolled up. Also, if the light-shielding layer 21 is formed of a printed layer, the increase in rigidity of the pouch 12 is reduced more than in the case of a metallic light-shielding layer 21, and the pouch 12 can be easily rolled up.

[0044] In addition, in the fluid package 10, the film 20 has a first wall 20f and a second wall 20s arranged in the front-to-back direction between the first wall 20f and the storage chamber 11, and the light-shielding layer 21 has an area larger than the area of ​​the storage chamber 11 in a direction perpendicular to the front-to-back direction, and has a first light-shielding layer 21f arranged on the first wall 20f and a second light-shielding layer 21s arranged on the second wall 20s.

[0045] According to this, the area of ​​the first light-shielding layer 21f and the area of ​​the second light-shielding layer 21s are larger than the area of ​​the storage chamber 11. Therefore, even if the first light-shielding layer 21f and the second light-shielding layer 21s are misaligned when the first wall 20f and the second wall 20s are overlapped, it is possible to reduce a situation in which the first light-shielding layer 21f and the second light-shielding layer 21s cannot cover the storage chamber 11.

[0046] Fluid package 10 also includes spout 13 that communicates with storage chamber 11, and pouch 12 has, in an area surrounding storage chamber 11, spout welded portion 36 where spout 13 and film 20 are welded together, and film welded portion 30 where opposing films 20 are welded together in the front-to-rear direction across storage chamber 11. Film 20 has transparent window portion 37 in which direct adhesive region 28 is partially provided, in at least one of spout welded portion 36 and film welded portion 30.

[0047] This makes it easy to check for fluid leakage from the storage chamber 11 at the spout welded part 36 and the film welded part 30 through the transparent window part 37. Furthermore, since the part of the window part 37 where the direct bonded region 28 is not provided is more transparent than the direct bonded region 28, it is even easier to check for fluid leakage through that part.

[0048] <Fluid Package Unit> 5, the fluid package unit 40 is provided in an apparatus that uses the fluid package 10, such as a printer. The fluid package 10 may be detachable from the apparatus, or may be fixed to the apparatus. The fluid package unit 40 has the fluid package 10 and a case 41.

[0049] The case 41 has, for example, a rectangular parallelepiped shape with an open front, and has an opening 41a, a rear surface 41b, and four side surfaces 41c. The opening 41a is located at the front of the case 41, and is surrounded by the four side surfaces 41c. The rear surface 41b is located at the rear of the case 41, and is provided on the opposite side to the opening 41a in the front-to-rear direction. An attachment section 42 and a winding mechanism 43 are provided inside the case 41.

[0050] The mounting portion 42 has the spout 13 of the fluid package 10 removably attached thereto. The winding mechanism 43 is disposed, for example, below the mounting portion 42 and has a leaf spring 43a, a roller 43b, and a moving mechanism 43c. The leaf spring 43a biases the pouch 12 toward the roller 43b. The roller 43b has an axis extending in the left-right direction and is supported by the moving mechanism 43c so as to be movable in the up-down direction. The moving mechanism 43c extends in the up-down direction on the side portion 41c of the case 41 and supports the roller 43b so that the roller 43b is rotatable.

[0051] When using such a fluid package unit 40, first, the user inserts the fluid package 10 into the case 41 through the opening 41a. At this time, the user positions the fluid package 10 so that the front surface of the fluid package 10 faces the user and the rear surface of the fluid package 10 faces the rear surface portion 41b of the case 41. This allows the user to visually check the display print layer 22 on the front surface of the fluid package 10 through the opening 41a. Therefore, for example, when there are multiple types of cases 41, the user can attach the fluid package 10 to the appropriate case 41 while checking the contents of the display print layer 22.

[0052] Next, the user attaches the spout 13 of the fluid package 10 to the mounting portion 42. As a result, the fluid package 10 has the spout 13 on the upper side, and the pouch 12 extends downward from the spout 13. Then, the user sandwiches the bottom welded portion 33 of the pouch 12 between the roller 43b and the leaf spring 43a. As a result, the bottom welded portion 33 is pressed against the roller 43b by the leaf spring 43a. As the fluid in the storage chamber 11 is discharged to the outside, the thickness of the pouch 12 becomes thinner. In response to this, the roller 43b rotates due to the biasing force of the leaf spring 43a, and the pouch 12 is wound up from the bottom welded portion 33 by the roller 43b, and the roller 43b moves along the moving mechanism 43c to the spout 13 side. Note that a motor for rotating the roller 43b may be provided.

[0053] As shown in Figs. 4 and 5, the fluid package unit 40 includes a fluid package 10, a mounting section 42 to which the fluid package 10 can be detachably attached, and a winding mechanism 43 for winding up the pouch 12 of the fluid package 10 mounted by the mounting section 42. The fluid package 10 has a spout 13 communicating with the storage chamber 11. The pouch 12 has a spout welded section 36 in which the spout 13 and the film 20 are welded in an area surrounding the storage chamber 11, and a film welded section 30 in which the films 20 facing each other across the storage chamber 11 in the front-rear direction are welded together. The film welded section 30 has a triangular bottom welded section 33 that is disposed farther from the spout 13 than the storage chamber 11 in the up-down direction and has a direct adhesive region 28. The pouch 12 is wound up by the winding mechanism 43 in a direction from the bottom welded section 33 toward the spout 13.

[0054] According to this, since direct adhesion area 28 of bottom side welded part 33 does not include light-shielding layer 21, an increase in rigidity is suppressed, and it is easy to roll up bottom side welded part 33. In addition, since bottom side welded part 33 has a triangular shape, it is possible to reduce rigidity, and it is easy to roll up bottom side welded part 33.

[0055] <Variation 1> In the fluid package 10 relating to variant example 1, in the above embodiment, as shown in Figures 3(a), 3(b) and 6(a), the film 20 has a first display printed layer 22f provided on the first wall 20f, arranged to cover the first light-shielding layer 21f farther from the storage chamber 11 in the front-to-back direction than the first light-shielding layer 21f, includes a first index 26, and displays information, and a second display printed layer 22s provided on the second wall 20s, arranged to cover the second light-shielding layer 21s farther from the storage chamber 11 in the front-to-back direction than the second light-shielding layer 21s, includes a second index 27 for aligning with the first index 26, and displays information.

[0056] For example, as shown in Fig. 6(a), the first display printed layer 22f of the first wall 20f has a first display portion 22fa and a first index 26. The first display portion 22fa has a pentagonal shape and is laminated on the first light-shielding layer 21f. The first index 26 has an annular shape, protrudes leftward from the left end of the first display portion 22fa, and is disposed to the left of the first light-shielding layer 21f.

[0057] The second display printed layer 22s of the second wall 20s has a second display portion 22sa and a second index 27. The second display portion 22sa is pentagonal in shape and is laminated on the second light-shielding layer 21s. The second index 27 is circular in shape and protrudes leftward from the left end of the second display portion 22sa, and is disposed to the left of the second light-shielding layer 21s. When the first wall 20f and the second wall 20s are disposed so as to overlap each other, the second index 27 is surrounded by the first index 26.

[0058] In this manner, the first index 26 and the second index 27 are disposed in the transparent direct bonding region 28. Therefore, when manufacturing the pouch 12 of Fig. 6(b), by folding the film 20 at the center in the up-down direction and overlapping the first wall 20f in front of the folded edge 20c with the second wall 20s in the rear of the folded edge 20c, the second index 27 of the second wall 20s can be visually recognized through the direct bonding region 28 of the first wall 20f. Therefore, the first wall 20f and the second wall 20s can be easily aligned based on the first index 26 and the second index 27.

[0059] <Variation 2> In the fluid package 10 according to the second modification, as shown in Fig. 7(a) and Fig. 7(b), the first indicator 26 has a first vertical indicator 26a for alignment in the up-down direction and a first horizontal indicator 26b for alignment in the left-right direction. The second indicator 27 has a second vertical indicator 27a arranged to be aligned with the first vertical indicator 26a in the up-down direction and a second horizontal indicator 27b arranged to be aligned with the first horizontal indicator 26b in the left-right direction.

[0060] For example, as shown in Fig. 7(a), the first display printed layer 22f of the first wall 20f has a first display portion 22fa, a pair of first vertical indicators 26a, and a pair of first horizontal indicators 26b. The first vertical indicator 26a is rectangular, protrudes leftward from the left end of the first display portion 22fa, is disposed to the left of the first light-shielding layer 21f, and is spaced apart in the vertical direction. The first horizontal indicator 26b is rectangular, protrudes upward from the top end of the first display portion 22fa, is disposed above the first light-shielding layer 21f, and is spaced apart in the horizontal direction.

[0061] The second display printed layer 22s of the second wall 20s has a second display portion 22sa, a second vertical indicator 27a, and a second horizontal indicator 27b. The second vertical indicator 27a is rectangular, protrudes leftward from the left end of the second display portion 22sa, and is disposed to the left of the second light-shielding layer 21s. The second horizontal indicator 27b is rectangular, protrudes upward from the upper end of the second display portion 22sa, and is disposed above the second light-shielding layer 21s. When the first wall 20f and the second wall 20s are disposed so as to overlap each other, the second vertical indicator 27a is located between a pair of first vertical indicators 26a, and the second horizontal indicator 27b is located between a pair of first horizontal indicators 26b.

[0062] In this way, when manufacturing the pouch 12, the film 20 is folded at the center in the vertical direction, and the first wall 20f in front of the folded edge 20c and the second wall 20s behind the folded edge 20c are overlapped. At this time, as shown in Fig. 7(b), alignment in two directions is performed based on the first vertical indicator 26a and the second vertical indicator 27a aligned in the vertical direction, and the first horizontal indicator 26b and the second horizontal indicator 27b aligned in the left-right direction. This can improve the accuracy of alignment between the first wall 20f and the second wall 20s.

[0063] <Variation 3> 7(a) and 7(b), in the fluid package 10 according to the third modification, the pouch 12 has a folded edge 20c formed by folding between the first light-shielding layer 21f and the second light-shielding layer 21s arranged in the vertical direction so that the first light-shielding layer 21f and the second light-shielding layer 21s are stacked with the storage chamber 11 in between in the front-rear direction, and an opening edge 20d that is far from the folded edge 20c in the vertical direction with the storage chamber 11 in between. The second indicator 27 is disposed closer to the opening edge 20d than the folded edge 20c in the vertical direction.

[0064] 7(a), when manufacturing the pouch 12, the film 20 is folded in the center in the vertical direction, and the first wall 20f in front of the folded edge 20c and the second wall 20s behind the folded edge 20c are overlapped. As a result, the edge of the first wall 20f opposite the folded edge 20c in the vertical direction and the edge of the second wall 20s opposite the folded edge 20c in the vertical direction overlap each other, forming the opening edge 20d.

[0065] When the film 20 is folded at the folding edge 20c, the deviation in the left-right direction between the first wall 20f and the second wall 20s increases the farther away from the folding edge 20c. Therefore, as shown in Fig. 7(b) , the first wall 20f is closer to the opening edge 20d than the folding edge 20c in the up-down direction. By folding the film 20 based on the first horizontal indicator 26b of the first wall 20f and the second horizontal indicator 27b of the second wall 20s, the accuracy of the alignment between the first wall 20f and the second wall 20s in the left-right direction can be improved.

[0066] It should be noted that all the above-mentioned embodiments may be combined with each other as long as they do not exclude each other. Also, many improvements and other embodiments of the present invention will be apparent to those skilled in the art from the above description. Therefore, the above description should be construed as merely illustrative and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present invention. Details of the structure and / or function of the present invention may be substantially modified without departing from the spirit of the present invention. [Industrial Applicability]

[0067] The fluid package and fluid package unit according to the present invention are useful as a fluid package and a fluid package unit, etc., capable of reducing adhesion failure between layers due to printed layers and ultraviolet curing of fluid. [Explanation of symbols]

[0068] 10: Fluid package 11: Containment room 12: Pouch 13: Spout 15: Insertion port 20:Film 20c: Folded edge 20d: Opening edge 20f: 1st wall 20s: Second wall 21: Light shielding layer 21f: 1st light shielding layer 21s: 2nd light shielding layer 22: Display printing layer 22f: 1st display printing layer 22s: 2nd display printing layer 23: Inner layer 23b: Adhesive layer 23d: Adhesive layer 24: Adhesive layer 25: Outer layer 26: 1st indicator 26a: First vertical index 26b: 1st horizontal indicator 27:Second indicator 27a: Second vertical index 27b: 2nd horizontal indicator 28: Direct adhesive area 30: Film welding part 33: Bottom welded part 36: Spout welded part 37: Window section 40: Fluid package unit 42: Mounting part 43: Winding mechanism

Claims

1. A bag-shaped pouch that contains a fluid in a chamber defined by a film; A spout communicating with the storage chamber; The film is a first wall and a second wall opposed to each other across the storage chamber in the front-rear direction; Each of the first wall and the second wall has An outer layer; an inner layer disposed closer to the storage chamber than the outer layer in the front-rear direction; a light-shielding layer that is provided between the outer layer and the inner layer, has an outer periphery that is located inside the outer periphery of the outer layer and the outer periphery of the inner layer and is at the same position as the outer periphery of the storage chamber or at a position outside the outer periphery of the storage chamber, covers the entire storage chamber, and blocks ultraviolet rays; an adhesive layer that bonds the outer layer and the inner layer with the light-shielding layer sandwiched therebetween and includes a direct bonding region that directly bonds the outer layer and the inner layer at a position surrounding the light-shielding layer; The adhesive layer is formed of a resin having adhesive properties.

2. A fluid package as described in claim 1, wherein the first light-shielding layer arranged on the first wall and the second light-shielding layer arranged on the second wall have an area larger than the area of ​​the storage chamber.

3. The film is a first display print layer provided on the first wall, disposed farther from the storage chamber than the first light-shielding layer in the front-rear direction so as to cover the first light-shielding layer, including a first indicator, and for displaying information; The fluid package of claim 2, further comprising: a second display printing layer provided on the second wall, positioned to cover the second light-shielding layer farther from the storage chamber in the front-to-back direction than the second light-shielding layer, including a second indicator for aligning with the first indicator, and for displaying information.

4. The first index includes a first vertical index for alignment in a top-bottom direction and a first horizontal index for alignment in a left-right direction, The fluid package of claim 3, wherein the second indicator has a second vertical indicator arranged to align with the first vertical indicator in the up-down direction, and a second horizontal indicator arranged to align with the first horizontal indicator in the left-right direction.

5. The pouch comprises: a folded edge formed by folding between the first light-shielding layer and the second light-shielding layer arranged in a vertical direction so that the first light-shielding layer and the second light-shielding layer are stacked on either side of the accommodation chamber in a front-rear direction; an opening edge far from the bent edge across the storage chamber in the vertical direction; The fluid package according to claim 3 , wherein the second indicator is disposed closer to the opening edge than the folded edge in the vertical direction.

6. The pouch has a spout welded portion in which the spout and the first wall and the second wall of the film are welded to each other in a range surrounding the periphery of the storage chamber, and a film welded portion in which the first wall and the second wall of the film that face each other in the front-rear direction across the storage chamber are welded to each other, The fluid package according to any one of claims 1 to 5, wherein the film has a transparent window portion in which the direct adhesive area is partially provided in at least one of the spout welding portion and the film welding portion.

7. A fluid package described in any one of claims 1 to 6, wherein the light-shielding layer is a printed layer.

8. A fluid package according to any one of claims 1 to 7; a mounting portion to which the fluid package can be detachably attached; a winding mechanism that winds up the pouch of the fluid package mounted by the mounting portion, The pouch has a spout welded portion in which the spout and the first wall and the second wall of the film are welded to each other in a range surrounding the periphery of the storage chamber, and a film welded portion in which the first wall and the second wall of the film that face each other in the front-rear direction across the storage chamber are welded to each other, The film welding portion is disposed farther from the spout than the storage chamber in the vertical direction, and has a triangular bottom welding portion having the direct bonding area, The pouch is wound by the winding mechanism in a direction from the bottom weld toward the spout.

Images