JP2008132100A - Packaging bag for liquid bag and liquid bag package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag for a liquid bag which hardly generates pinholes and a liquid bag package which hardly generates pinholes on the packaging bag. <P>SOLUTION: The packaging bag 2 is hermetically sealed by heat sealing the upper edge while a two-tank medicinal solution bag 3 is accommodated in the packaging bag 2 and has a pouring plug 34 whose both sides are spot-sealed. The packaging bag 2 is formed by superposing laminated sheets 20 and by heat-sealing both side parts and the lower end part for a prescribed width. Side sealing parts SS comprise upper side edge sealing parts SSa which are formed along both side edges of the laminated sheet 20 at the upper sides and lower slanting sealing parts SSb which are slanted inside of the lower end parts of the upper side edge sealing parts SSa in a manner to support the lower end corner parts of the bag 3 to be accommodated. The laminated sheet 20 is formed by dry-laminating an outer sheet comprising a base material layer and a reinforcing layer, an intermediate sheet comprising a gas barrier layer and a reinforcing layer, and an inner sheet having a heat bondability through a release layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging bag for hermetically packaging a liquid bag in which a medicinal solution, nutritional food, medicine, liquid food stored for a long period of time, and the like, and a liquid bag package that is hermetically packaged in the packaging bag.

  For example, a chemical bag used for infusion is formed by a bag-like container made of a flexible sheet such as polypropylene or polyethylene. However, the active ingredient in the contents filled in such a chemical bag is deteriorated. In order to prevent this, as shown in FIG. 6, a laminated sheet having a gas barrier layer is overlapped between the outermost layer and the innermost layer, and both sides are formed so that a container opening for the chemical solution bag is formed at the upper end. The chemical solution bag 50 is stored or transported in a state where it is housed together with a deoxidant in a packaging bag 60 formed by heat-sealing the upper and lower ends and sealed by heat-sealing the unsealed upper end. Yes.

JP 2005-007053 A

  However, since the packaging bag 60 for hermetically packaging the chemical solution bag 50 is set to a certain size with respect to the chemical solution bag 50 in consideration of the workability of storing the chemical solution bag 50, vibration during transportation, etc. As a result, the chemical solution bag 50 moves in the packaging bag 60, and the edge portion of the relatively hard spout member 51 attached to the chemical solution bag 50 repeatedly collides with the vicinity of the seal portion of the packaging bag 60, and the impact at the time of the collision As a result, a pinhole may occur in the packaging bag 60.

  In addition, there are chemical liquid bags in which two chemical liquid storage chambers each containing different chemical liquids are connected to each other via a heat-sealed partition wall. In some cases, the bag is folded in the vicinity and stored in a packaging bag. In the case of such a chemical solution bag package, since corners are formed at both ends of the fold of the chemical solution bag, when the chemical solution bag moves in the packaging bag due to vibration during transportation, the corners of the packaging bag are There is a possibility that pinholes are generated in the packaging bag due to repeated collisions in the vicinity of the seal portion and impacts in the collision.

  Moreover, since the chemical solution bag package as described above is stored and transported in a state of standing in a cardboard box or the like, for example, the packaging bag may be bent repeatedly due to vibration during transportation, etc. When each layer constituting the laminated sheet forming the sheet is integrated with an adjacent layer, when the laminated sheet is bent, the layer located on the outer side is compared to the layer located on the inner side. Since it expands greatly, the bent part may be fatigued by repeated bending and a pinhole may be generated. In addition, the bent portion of the packaging bag may be worn due to contact with the cardboard box or the like, and a pinhole may be generated in the bent portion.

  Then, the subject of this invention is providing the liquid bag packaging body which a pinhole does not generate | occur | produce easily, and the packaging bag of a liquid bag which a pinhole does not generate | occur | produce easily.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a laminated sheet having a gas barrier layer is overlapped between an outermost layer and an innermost layer, and a liquid bag containing port is formed at the upper end portion. As described above, a packaging bag for a liquid bag in which both sides and a lower end are heat-sealed, wherein the laminated sheet has a release layer between the outermost layer, the innermost layer, and the gas barrier layer. The liquid bag is characterized in that the seal portion formed on both side portions has an inner edge on its lower side inclined inward so as to support a lower end corner portion of the liquid bag to be accommodated. A packaging bag is provided.

  Moreover, in order to solve said subject, the invention concerning Claim 2 accommodated the liquid bag in the packaging bag of Claim 1, and sealed by heat-sealing the unsealed upper end part in the packaging bag. The liquid bag package characterized by the above is provided.

  Further, the invention according to claim 3 is characterized in that in the liquid bag package of the invention according to claim 2, it has a spot seal portion for restricting the upward movement of the stored liquid bag. .

  As described above, the packaging bag of the liquid bag of the invention according to claim 1 and the packaging bag of the liquid bag package of the invention according to claim 2 have the release layers between the outermost layer, the innermost layer and the gas barrier layer, respectively. Since the both sides of the release layer in the laminated sheet are separated from each other even if the packaging bag is repeatedly bent due to vibration during transportation, etc., the laminated sheet is formed. Compared with the case where each layer is integrated with an adjacent layer, the bent portion is less likely to fatigue and pinholes are less likely to occur.

  In addition, the seal portions formed on both sides are inclined inward on the inner edge on the lower side so as to support the lower end corner portion of the medicinal solution bag to be accommodated. It is hard to move, and the corners at both ends of the crease formed when the liquid bag spout member and the liquid bag are folded in two are less likely to collide with the vicinity of the seal portion, so the occurrence of pinholes associated with the collision can be suppressed. .

  Further, in the liquid bag package of the invention according to claim 3, the liquid bag accommodated in the packaging bag is difficult to move up and down due to the presence of the spot seal portion, and the pinhole caused by the collision near the seal portion of the liquid bag Occurrence can be further suppressed.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows a chemical solution bag package 1 formed by sealing and packaging a two-tank chemical solution bag 3 in which two types of chemical solutions are enclosed in a packaging bag 2.

  As shown in FIG. 2, the packaging bag 2 is formed by stacking a substantially rectangular laminated sheet 20 having a gas barrier layer and heat-sealing both side portions and a lower end portion with a predetermined width. A storage port is formed at the upper end. As shown in FIG. 1, a pair of cuts 2a and 2a are formed on the lower sides of the heat-sealed upper portion of the spot seal portion PS formed when the two-tank chemical solution bag 3 is accommodated and hermetically packaged. It is formed, and when opening, the upper part is broken in the width direction using this notch 2a as a trigger. In addition, the shaded display part in FIG.1 and FIG.2 has shown the heat seal part.

  The side seal part SS having a predetermined width formed on both side parts has an upper side edge seal part SSa whose upper side is formed along both side edges of the laminated sheet 20 and a lower end corner part of the two-tank medical solution bag 3 to be accommodated. The lower seal portion SSb is inclined inward from the lower end portion of the upper side edge seal portion SSa, and the bottom seal portion BS is connected so as to connect the lower end portions of the lower inclined seal portion SSb. Is formed. Therefore, the outside of the lower inclined seal portion SSb in the laminated sheet 20 is in an unsealed state.

  As shown in FIG. 3, the laminated sheet 20 is made of a biaxially stretched polypropylene film having a thickness of 40 μm, and has a base layer 21a excellent in wear resistance, heat resistance, and impact resistance, and two layers having a thickness of 15 μm. An outer sheet 21 made of an axially stretched polyamide film and made of a reinforcing layer 21b excellent in impact resistance and pinhole resistance, and an oxygen sheet formed by a 15 μm thick silicon oxide-deposited biaxially stretched polyethylene terephthalate film. An intermediate sheet 22 formed of a gas barrier layer 22a that blocks the passage of the gas and a biaxially stretched polyamide film having a thickness of 15 μm and comprising a reinforcing layer 22b having excellent impact resistance and pinhole resistance, and non-stretched having a thickness of 90 μm An inner sheet 23 formed of a linear low-density polyethylene film and having heat adhesion, and an outer side The sheet 21, the intermediate sheet 22, and the inner sheet 23 are dry-laminated via the release layer 24. The biaxially stretched film constituting the base material layer 21a and the reinforcing layer 21b of the outer sheet 21 and the biaxially stretched film constituting the gas barrier layer 22a and the reinforcing layer 22b of the intermediate sheet are at least in the breaking direction ( It is stretched in the width direction of the packaging bag 2 and has tearability in the breaking direction. Specifically, it is a film stretched biaxially in the width direction of the packaging bag 2 and in the direction perpendicular thereto.

  As a lamination method of each layer when forming the outer sheet 21, the intermediate sheet 22, and the inner sheet 23 constituting the laminated sheet 20, a dry lamination method, an extrusion lamination method in which melt extrusion is performed and polyethylene is laminated, or the like The release layer 24 is formed by coating one sheet by printing or the like with a silicone or polyamide nitrified cotton-based coating agent or the like.

  The base material layer 21a is formed of a biaxially stretched polypropylene film having a thickness of 40 μm, but is not limited thereto, and is formed of a single layer film such as a biaxially stretched polyamide film or a biaxially stretched polyester film. It is also possible to do.

  The reinforcing layers 21b and 22b are formed of a biaxially stretched polyamide film having a thickness of 15 μm. However, the present invention is not limited to this, and various films that can ensure good linear tearability are laminated. It is also possible to form by. As such a film, a film stretched in one direction, a film stretched in one direction and stretched small in the other direction, or a multilayer film obtained by laminating a uniaxially stretched film on a biaxially stretched film can be used. As the uniaxially stretched film, a film obtained by stretching high-density polyethylene 5 to 15 times in the transverse direction (for example, “Kalalian YC”, “Kalalian Y”: manufactured by Denki Kagaku Kogyo) is preferable because it has excellent linear cut properties. In addition, as a multilayer film in which a uniaxially stretched film is laminated on a biaxially stretched film, first, a film obtained by uniaxially stretching a melt-extruded sheet in the longitudinal direction is prepared, and then the surface (one side or both sides) of this uniaxially stretched film A film (for example, “polypropylene film YT42”, “polypropylene film YT25” manufactured by Toray Industries, Inc.) that is extruded in the horizontal direction and extruded in the horizontal direction is used. However, since a uniaxially stretched film is inferior in impact resistance, gas barrier property, etc. compared with a biaxially stretched film, it is desirable to use a biaxially stretched film as a reinforcement layer.

  The gas barrier layer 22a is formed of a silicon oxide vapor-deposited polyamide film, but may be formed of a laminate film having a two-layer structure or a three-layer structure in which an ethylene-vinyl alcohol copolymer (EVOH) and polyamide are coextruded. It is also possible to form a single-layer film made of EVOH, a vapor-deposited film such as polyester or polyamide vapor-deposited with aluminum oxide or aluminum, or a polyvinyl alcohol film.

  As shown in FIG. 4, the two-tank chemical solution bag 3 includes a bag main body 31 formed by connecting two chemical solution storage chambers 32a and 32b each containing different chemical solutions through a partition wall 33b that can communicate with each other. In addition, each of the chemical liquid storage chambers 32a and 32b in the back body 31 is composed of dispensing port plugs 34 and 35, respectively. , 32b are mixed with different chemical solutions, and the mixed chemical solution is poured out from the dispensing port plug 34 or the dispensing port plug 35.

  The partition wall 33b that divides the two chemical solution storage chambers 32a and 32b has a lower sealing strength than the heat seal edges 33a and 33c at both ends, and holds one of the chemical solution storage chamber 32a or the chemical solution storage chamber 32b. When the internal pressure is increased, seal breakage occurs in the partition wall portion 33b having a low seal strength, the sealed flexible sheets are separated from each other, and both the chemical solution storage chambers 32a and 32b communicate with each other. As a result, different chemical solutions stored in the two chemical solution storage chambers 32a and 32b are mixed.

  The pouring plugs 34 and 35 are fitted into a plug body formed of a resin having thermal adhesiveness to the flexible sheet forming the bag body 31 and the mouth portion of the plug body. In the case of medication, the bottle needle of the chemical solution set is pierced through the rubber stopper.

  After the two-pack chemical solution bag 3 configured as described above is folded in half at the partition wall 33b portion and stored in the packaging bag 2 with the spout plugs 34 and 35 facing upward, The top edge of a packaging bag 2 is heat-sealed to form a top seal portion TS, and the both sides of the protruding spout 34 are partially heat-sealed to form a spot seal portion PS. Then, the chemical solution bag package 1 shown in FIG. 1 is completed.

  As described above, in this chemical solution bag package 1, the packaging bag 2 in which the two-tank chemical solution bag 3 is hermetically packaged is formed by laminating the outer sheet 21, the intermediate sheet 22, and the inner sheet 23 via the release layer 24. Therefore, when the packaging bag 2 is repeatedly bent due to vibration during transportation, the outer sheet 21, the intermediate sheet 22, and the inner sheet 23 are separated from each other. Therefore, compared with the case where a laminated sheet in which the outer sheet, the intermediate sheet, and the inner sheet constituting the laminated sheet 20 are integrated, the bent portion is less likely to be fatigued, and the outer sheet 21, the intermediate sheet 22, and the gas barrier Pinholes are unlikely to occur in the intermediate sheet 22 having the layer 22a.

  Further, the lower inclined seal portion SSb inclined inward from the lower end portion of the upper side edge seal portion SSa is provided so that the side seal portion SS of the packaging bag 2 supports the lower end corner portion of the two tank chemical solution bag 3 accommodated. Since it has, the accommodated two tank chemical | medical solution bag 3 is hard to move within the packaging bag 2, and the corner | angular part of the both folds of the two tank chemical | medical solution bag 3 folded in two is hard to collide with the side seal part SS vicinity. Therefore, it is possible to suppress the occurrence of pinholes associated with the collision of the corners of the two tank chemical solution bag 3.

  Moreover, in this chemical solution bag package 1, the two tank chemical solution bag 3 is spot-sealed in a state where the two tank chemical solution bag 3 is accommodated in the packaging bag 2, so that the two tank chemical solution bag 3 is In addition, it is difficult to move not only in the width direction of the packaging bag 2 but also in the vertical direction, and the dispensing port plug 34 is less likely to collide with the vicinity of the top seal portion TS. Can be suppressed.

  Moreover, since the pair of notches 2a and 2a are formed in the packaging bag 2 of this chemical | medical solution bag package 1 under the spot seal part PS in the heat-sealed upper both side edges, this notch 2a is formed. When the packaging bag 2 is broken in the width direction as a trigger, the upper end portion of the packaging bag 2 including the spot seal portion PS is cut off, so that the spot seal portion PS does not become an obstacle to taking out the two-tank chemical solution bag 3. The two tank chemical solution bag 3 can be smoothly taken out from the packaging bag 2.

  In addition, in the chemical | medical solution bag packaging body 1 mentioned above, although the unsealed part is formed in the outer side of the lower inclination seal part SSb of the packaging bag 2, the packaging bag of this invention is limited to the thing of such a form. Instead, the unsealed region outside the lower inclined seal portion SSb in the packaging bag 2 described above may be sealed, and the outer side of the lower inclined seal portion SSb as in the chemical solution bag package 1A shown in FIG. May be excised.

  Moreover, in the chemical | medical solution bag packaging body 1 mentioned above, although a pair of notches 2a and 2a are formed in the lower side of the spot seal part PS in the heat-sealed upper both side edges of the packaging bag 2, it is limited to this. In the case where the outside of the lower inclined seal portion SSb is cut out as in the chemical solution bag package 1A shown in FIG. 5, the lower end of the accommodated two-tank chemical solution bag 3 in the lower inclined seal portion SSb. It is also possible to form a pair of cuts 2a and 2a at a position slightly above the portion. As described above, when the cuts 2a and 2a are formed at a position slightly above the lower end of the stored two-tank chemical solution bag 3, the top and bottom are reversed when the chemical solution bag packaging body 1A is opened. Thus, the two-tank medical solution bag 3 moves slightly, and the lower end of the two-tank chemical solution bag 3 (the upper end when the top and bottom are reversed) is positioned below the pair of cuts 2a and 2a. Therefore, the packaging bag 2A can be smoothly broken, and the width of the outlet formed by breaking is larger than the width of the two-tank chemical solution bag 3, so that the two-tank chemical solution bag 3 can be taken out smoothly. It can be carried out.

  Moreover, in the chemical | medical solution bag packaging body 1 mentioned above, although the spot seal | sticker part PS is formed only in the both sides of the protruding mouth plug 34 of the two tank chemical | medical solution bag 3 accommodated, the chemical | medical solution bag shown in FIG. Like the package 1 </ b> A, spot seal portions PS may be formed on both sides of the bag body 31.

  Further, the packaging bag 2 used in the above-described chemical solution bag packaging body 1 has an outer sheet 21 composed of a base material layer 21a and a reinforcing layer 21b, an intermediate sheet 22 composed of a gas barrier layer 22a and a reinforcing layer 22b, and has a thermal adhesive property. The inner sheet 23 is formed by the laminated sheet 20 that is dry-laminated through the release layer 24, but is not limited to this, and has a gas barrier layer between the outermost layer and the innermost layer. Various laminated sheets each having a release layer between the outer layer and the innermost layer and the gas barrier layer can be employed.

  Moreover, although each embodiment mentioned above demonstrated the case where the two-folded chemical | medical solution bag 3 folded and sealed was demonstrated, the liquid bag package and packaging bag of this invention are the chemical | medical solution bags with which the single chemical | medical solution was enclosed. Needless to say, it is also useful for sealed packaging.

  Moreover, although each embodiment mentioned above demonstrated the packaging bag 2 suitable for carrying out hermetic packaging of a chemical | medical solution bag, it is not limited to this, The packaging bag of this invention is a nutrient food, a chemical | drug | medicine, long-term Needless to say, the present invention can also be applied to the case of hermetically packaging a liquid bag in which stored food or the like is enclosed.

It is a top view which shows the chemical | medical solution bag package which is one Embodiment of the liquid bag package concerning this invention. It is a top view which shows the packaging bag used for a chemical | medical solution bag packaging body same as the above. It is sectional drawing which shows the lamination sheet which forms the packaging bag same as the above. It is a top view which shows the 2 tank chemical | medical solution bag accommodated in a packaging bag same as the above. It is a top view which shows the liquid bag package which is other embodiment. It is a top view which shows the conventional liquid bag package body.

Explanation of symbols

1, 1A Chemical solution bag packaging (liquid bag packaging)
2, 2A Packaging bag 3 Two tank chemical solution bag (liquid bag)
20 Laminated sheet 21 Outer sheet 21a Base material layer (outermost layer)
21b Reinforcement layer 22 Intermediate sheet 22a Gas barrier layer 22b Reinforcement layer 23 Inner sheet (innermost layer)
24 Peeling layer 31 Back body 32a, 32b Chemical solution storage chamber 33a, 33c Heat seal edge 33b Partition wall part 34, 35 Outlet plug BS Bottom seal part PS Spot seal part SS Side seal part SSa Upper side edge seal part SSb Lower slope Seal part TS Top seal part

Claims (3)

A laminated sheet having a gas barrier layer is placed between the outermost layer and the innermost layer, and both sides and the lower end are heat-sealed so that a liquid bag containing liquid is formed at the upper end. A packaging bag for a liquid bag,
The laminated sheet has a release layer between the outermost layer and the innermost layer and the gas barrier layer, respectively.
The liquid bag packaging bag, wherein the seal portion formed on the both side portions has an inner edge on the lower side inclined inward so as to support a lower end corner portion of the liquid bag to be accommodated.   A liquid bag package, wherein the liquid bag is housed in the packaging bag according to claim 1 and sealed by heat-sealing an unsealed upper end portion of the packaging bag.   The liquid bag package according to claim 2, wherein the packaging bag has a spot seal portion that regulates the upward movement of the accommodated liquid bag.

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