JP2019131285A - Liquid filling composite bag - Google Patents

Abstract

To provide a liquid bag filling composite bag which comprises an inner bag which is a non-self-standing liquid material-filled package filled with a liquid material and an outer bag capable of stably holding the inner bag, and which can achieve capacity efficiency of the liquid material and space saving during display.SOLUTION: A liquid filling composite bag includes a non-self-standing inner bag made of a soft thin-walled plastic film that fills liquid material inside, and an outer bag having a self-standing cylindrical barrel made of a thick-walled plastic film that can fill the inner bag inside,the inner bag has a sheet-like nozzle for pouring liquid material at an upper end or an upper side end and the outer bag includes a sealing structure part configured by at least three vertical ribs at the upper end of the cylindrical barrel.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite bag for filling a liquid material comprising an inner bag formed by filling and packaging a liquid or viscous liquid material in a packaging bag, and an outer bag for storing and holding the inner bag. Non-self-supporting inner bags filled with liquid materials such as beverages, pharmaceuticals, and chemicals, and can stably hold them while improving the volumetric efficiency of liquid materials and effectively utilizing the display space during display This paper proposes a composite bag for filling a liquid material comprising a self-supporting outer bag.

  Regarding the inner bag formed by filling the packaging bag with the liquid material, that is, the liquid material-filled package, there are those disclosed in Patent Documents 1 and 2 according to the proposals of the inventors. The packaging bag used for this liquid-filled package is made of a soft thin-walled laminated plastic film, and since the liquid-filled package itself has neither self-supporting nor fixed form, its transportation, storage, use, etc. Is to be stored in an exterior body such as a self-supporting container, that is, an outer container.

JP 2010-260614 A International Publication 2013/054411

  All of the self-supporting outer containers (packaging bags and containers) used in the above-described conventional technology are formed in a polygonal shape or the like in plan view in accordance with the three-dimensional shape of the liquid filling package to be stored in the standing posture. It is cylindrical and is configured so that the body has an elliptical shape in plan view and a plate shape at the top. For this reason, in the conventional outer container, the volume of liquid material in the upper part is small (there is almost no state), and the volume efficiency of liquid material (capacity of liquid material / outer container height) is lower than that of paper cartons or PET bottles There was a problem.

  In addition, the conventional outer container has a plate-like upper side surface that is wider than the cylindrical lower side surface. Also, when displaying on product shelves such as supermarkets and stores, it is necessary to arrange the side of the product name etc. facing the front, so there is a problem that extra display space is required there were.

  Therefore, in the present invention, it is composed of an inner bag that is a non-self-supporting liquid material-filled package filled with a liquid material, and an outer bag that can stably hold the inner bag, and the volume of the liquid material An object of the present invention is to provide a composite bag for filling a liquid material that can save efficiency and space saving during display.

  The inventor has been able to overcome the above-mentioned problems of the prior art, and as a result of intensive investigations to develop an outer bag that should also be referred to as an outer container. Developed the back.

That is, the present invention provides a non-self-supporting inner bag made of a soft thin-walled plastic film that is filled with a liquid material inside, and an outer body having a self-supporting cylindrical body made of a thick-walled plastic film that can accommodate the inner bag. A composite bag for filling a liquid material comprising a bag,
The inner bag has a sheet-like nozzle for pouring liquid material at the upper end or upper side end,
The outer bag includes a sealing structure portion formed of at least three vertical ribs at an upper end portion of the cylindrical body portion.

In the present invention,
(1) The sealing structure portion is formed by a mountain-shaped top wall continuous to the upper end edge of the cylindrical body, and three or more vertical ribs standing from the top wall, and the top surface of the vertical rib is horizontal. Being
(2) Each of the vertical ribs is composed of a pair of upright walls formed by folding and folding the side walls connected to the upper end edge of the cylindrical body portion outward.
(3) The vertical ribs are arranged upright in a radial manner of 3 or more from a substantially central position of the outer bag in a plan view of the outer bag.
(4) One of the vertical ribs is a cover vertical rib for sandwiching the liquid material pouring sheet-like nozzle, and the cover vertical rib is a separation that can expose the liquid material pouring sheet-like nozzle. Having a planned line,
(5) The outer bag has a ship bottom mold bottom portion for assisting independence at a lower end portion of the cylindrical body portion,
(6) The inner bag has a fixing portion to be joined to the outer bag at least at the upper end.
(7) The cylindrical body of the outer bag has a cylindrical shape with substantially the same opening cross section over the entire length from the lower end to the sealing structure at the upper end.
(8) The outer bag is attached to the sealing structure part with a detachable cap for covering the liquid material dispensing sheet-like nozzle,
(9) The thin plastic film of the inner bag has a thickness of 20 μm or more and less than 80 μm, and the thick plastic film of the outer bag has a thickness of 80 μm or more and 300 μm or less,
(10) The cylindrical body portion of the outer bag has at least one handle, and a tongue piece is provided on at least an inner edge of the grip portion of the handle,
Is a more preferred embodiment.

  According to the composite bag for filling liquid material according to the present invention, the outer bag for storing the inner bag filled with the liquid material has at least three vertical ribs, preferably four crosses, at the upper end of the cylindrical body. Since the sealing structure portion that provides a sealing structure made of a mold is provided, the cylindrical body portion of the outer bag can be formed into a cylindrical body having substantially the same opening cross section. From the lower end to the position of the upper sealing structure part can be contributed to the accommodation of the liquid material. Therefore, the volumetric efficiency of the liquid material is improved to substantially the same as that of the PET bottle, and the storage (housing) when a plurality of the bottles are arranged and displayed is good, and the space can be saved.

  In addition, according to the composite bag for filling a liquid material of the present invention, one vertical rib of the sealing structure portion provided at the upper end portion of the outer bag protrudes from the upper end portion or the upper side end portion of the inner bag. Since it is a cover vertical rib that sandwiches and stores a sheet nozzle for delivery (hereinafter also referred to as “sheet nozzle”), transportation or the like even when the sheet nozzle is made of a thin soft plastic film There is no risk of deformation during handling or unintentional opening. Moreover, according to the present invention, only one vertical rib can be cut off along the planned separation line, and the sheet-like nozzle can be exposed to the outside for use.

  In the present invention, each of the vertical ribs is formed by overlapping a pair of upright walls by folding the upper portion of the cylindrical body portion of the outer bag, so that the upper end portion of the outer bag is suppressed in height. It can be sealed.

  Further, according to the present invention, the vertical ribs in the upper constricted sealing structure portion extend radially from the substantially central position of the outer bag in a plan view of the outer bag, preferably in a cross shape. Since each of the vertical ribs can be in an independent state and can be flexibly flexed independently, for example, the liquid bag filling composite bag of the present invention unexpectedly dropped, etc. However, the impact is absorbed by each vertical rib, and the joint portion of the vertical rib is not easily peeled off, and the liquid bag filling composite bag (outer bag) remains in its original shape. Can be kept in.

  In addition, the sealing structure portion can be easily opened and disassembled by pulling the radially positioned vertical ribs in directions away from each other with fingers. For example, the inner bag is taken out from the outer bag. The remaining amount of the liquid material in the inner bag can be reduced, and each material can be separated and discarded. Further, when the outer bag is made of a plastic film having rigidity, a plurality of liquid material filling composite bags are stably provided via at least three vertical ribs whose upper surfaces are horizontal (the same height). Since they can be stacked, space saving can be achieved during transportation and display.

  In the present invention, when the inner bag is joined and fixed to the outer bag at least at the top position, the sheet-like nozzle faces downward to pour out the liquid material from the liquid material filling composite bag. When the sheet nozzle is tilted like this, deformation of the sheet-like nozzle is suppressed and smooth pouring becomes possible, and even when the sheet-like nozzle has a self-sealing function, adhesion between the inner surfaces of the dispensing passage is inhibited. Intrusion of outside air can be sufficiently prevented.

  The packaging bag used to constitute the inner bag is formed by a laminated film in which a single plastic film or a plurality of plastic films including one or more plastic films or metal foils are laminated. In particular, when a film having a waist is used, it is possible to suppress the occurrence of wrinkles on the inner bag when the liquid bag filling composite bag is tilted to pour out the liquid material. The slipping of the inner bag can be suppressed.

  Furthermore, in the present invention, a removable cap that can cover the sheet-like nozzle exposed to the outside from the sealing structure portion is attached to the outer bag so as to be stored after opening the sheet-like nozzle. In this case, the spout can be prevented from being soiled and hygienic, and when the cap has a sandwiching structure for the sheet-like nozzle, the liquid material is opened after the sheet-like nozzle is opened. Even if the filling composite bag unexpectedly falls down, the liquid material can be prevented from leaking out.

  Further, according to the present invention, the handle is provided in the cylindrical body portion of the outer bag, so that the handling can be facilitated even when the liquid bag filling composite bag has a large capacity. However, since the liquid-filling composite bag can be tilted, the discharge amount and the discharge direction of the packaged item can be easily adjusted. Further, since the grip is provided with a tongue piece at least on the inner edge of the grip portion, the gripping portion is bent and bent when the grip portion is gripped, and the grip is gripped through the tongue piece. For example, it can be expected that the hand does not hurt even if the handle is held firmly or held for a long time.

It is a perspective view which shows one Embodiment of the composite bag for liquid substance filling of this invention. It is a top view of the composite bag for liquid substance filling of FIG. It is a perspective view which shows the state before accommodation of an inner bag of the outer bag which comprises the composite bag for liquid substance filling of FIG. It is a top view which shows the formation method of a sealing structure part. It is a perspective view which shows the state which cut off the cover part of the sealing structure part. It is a fragmentary perspective view which shows other embodiment of the sealing structure part of the composite bag for liquid substance filling of this invention. It is a perspective view which shows an example of the cap provided in the head of the outer bag of the composite bag for liquid substance filling of this invention. (A), (b) is an end elevation in the AA position of the cap of FIG. It is a perspective view which shows the other example of the cap provided in the head of the outer bag of the composite bag for liquid substance filling of this invention of this invention. It is a perspective view which shows other embodiment of the composite bag for liquid substance filling of this invention. It is a perspective view which shows one Embodiment of the inner bag which comprises the composite bag for liquid filling of this invention.

  The composite bag for filling a liquid material of the present invention is composed of an inner bag made of a soft plastic film filled with a liquid material and an outer bag for storing and holding the inner bag. The features of the present invention are shown below. This will be described based on the embodiment.

  FIG. 1 is a perspective view showing an embodiment of a composite bag P for filling a liquid material, and FIG. 2 is a plan view of the composite bag P for filling a liquid material.

  The composite bag P for filling a liquid material includes an inner bag 30 made of a soft thin plastic film having no self-supporting property and indicated by a dotted line in FIG. 1, and an outer bag 10 made of a thick plastic film for storing and holding the inner bag 30. It is comprised from. The inner bag 30 and the outer bag 10 are preferably joined to each other at the upper end portion and fixed to each other, whereby the liquid-filling composite bag P is discharged into the sheet-like nozzle 31 for pouring out the liquid material. When the sheet-like nozzle 31 is tilted downward, the sheet-like nozzle 31 is not deformed and can be smoothly poured out, and the sheet-like nozzle 31 prevents outside air from entering as will be described later. Even when it has a self-sealing function, it is possible to sufficiently prevent the outside air from entering without hindering the close contact between the inner surfaces of the extraction passages. It is more preferable that the inner bag 30 and the outer bag 10 are fixed by providing a fixing portion 28 at a position directly below the sheet-like nozzle 31 of the inner bag 30 as shown in FIG.

  As shown in the plan view of FIG. 2, the upper end portion of the liquid material filling composite bag P has four vertical ribs 17a to 17d comprising a top wall 18 and a pair of upright walls arranged radially (preferably in a cross shape). It is sealed by a sealing structure portion 13 made of On the other hand, the lower end portion of the liquid-filling composite bag P is composed of a bottom-shaped bottom portion having an elliptical shape or hexagonal shape in plan view, and is configured to be able to stand on its own by the bottom portion 25 of the bottom-shaped mold.

  First, the outer bag 10 will be described. As shown in FIG. 1, the outer bag 10 includes a cylindrical body portion 12, and a sealing structure portion 13 is provided at the upper end portion of the cylindrical body portion 12. In addition, the sealing structure part 13 is comprised by the four vertical ribs 17a-17d which consist of a pair of standing wall arranged radially, and the mountain-shaped top | upper surface wall 18 partitioned off by this vertical rib 17a-17d. .

  The outer bag 10 is preferably made of a material having strength capable of providing self-supporting property as the liquid bag filling composite bag P, and can be a plastic film, paper, a composite of plastic film and paper, or the like. .

In particular, when the outer bag 10 is composed of two or more laminated plastic films including a base film layer and a sealant layer, a polyethylene terephthalate film, a nylon resin film, polypropylene, polyethylene, or the like is used as the base film layer. On the other hand, as the sealant layer, it is preferable to use polyethylene or polypropylene. In this case, the laminated plastic film has a thickness of 80 to 300 μm, preferably 100 to 200 μm, and more preferably a waist of the laminated plastic film, in order to provide the self-supporting and regularity when the inner bag 30 is stored and held. The degree is about 40 to 300 mN. Further, a gas barrier layer composed of a SiO ₂ vapor deposition layer, an EVOH layer, a vinylidene chloride coating layer, an aluminum oxide coating layer, an Al vapor deposition layer, or a sputtering layer thereof is preferably formed on the surface of any one of the base film layers. It may be provided with a thickness of 0.5 to 20 μm. In this case, the outer bag 10 is provided with water vapor impermeability, gas barrier properties, and the like, and the packaged item in the inner bag 30 to be stored and held over a long period of time. Storage without deterioration is possible.
Since both the outer bag 10 and the inner bag 10 constituting the liquid bag filling composite bag P are made of a plastic film, the liquid bag filling composite bag P can be used when the number of items to be packaged in the inner bag 30 is reduced. The packaged items can be squeezed out by folding them as they are.

FIG. 3 is a perspective view showing an embodiment of the outer bag 10 ′ before the inner bag 30 is accommodated, and a cylindrical body 12 and a bottom 25 for self-supporting are provided at the lower end thereof. The outer bag 10 'can be manufactured by various known methods for manufacturing a standing pouch. For example, the outer bag 10' has a bottom portion folded in two at the lower ends of two front and back plastic films constituting the cylindrical body portion 12. The bottom part 25 which consists of a gusset bottom can be formed by pinching | pinching the plastic film for use with a folding part up, and sealing a peripheral part in that state.
In FIG. 3, the cylindrical body 12 is formed by fusing and bonding both side edges of the front and back plastic films (seal portions 12a and 12b), but the single plastic film is folded back in the width direction. It can also be formed.

  The cylindrical body 12 stores the inner bag 30 filled with the liquid material through the upper end opening 12 ′. At this time, the upper end edge of the upper end opening 12 ′ and the stored inner bag 30 are stored. The upper end edge of the inner bag 30 is overlapped (for example, partially pasted) to fix the inner bag 30 in the outer bag 10 and the sheet-like nozzle 31 of the inner bag 30 to a predetermined position. It is preferable in terms of arrangement.

After the inner bag 30 is housed in the cylindrical body 12, for example, the upper end portion of the cylindrical body 12 is positioned between the seal part 12a and the seal part 12b as shown in FIG. 1 is folded outwards, and the four inner front end portions 16 that become the valley fold portions are brought into contact with each other, so that the mountain-shaped top wall 18 as shown in FIG. A conical sealing structure portion 13 is formed which is composed of a pair of upstanding walls and is composed of four vertical ribs 17a to 17d which are radially (cross-shaped).
In this embodiment, the sealing structure portion 13 is composed of four vertical ribs 17a to 17d, but it is sufficient to provide three or more vertical ribs. In the present invention, the upper surfaces of the vertical ribs 17a to 17d are provided. Since the flat surface formed by the upper surfaces of the vertical ribs 17a to 17d is horizontal, a plurality of liquid-filling composite bags P can be stably stacked, and can be used during transportation or display. Space can be saved.

  In the composite bag P for filling liquid material thus configured, the liquid material can be filled with the same opening area over the entire length from the bottom of the cylindrical body 12 of the outer bag 10 to the lower end of the sealing structure 13. In addition, since the upper end opening portion 12 ′ is sealed by the sealing structure portion 13, the cylindrical body portion 12 can make the height of the liquid-filled composite back P as low as possible. Therefore, according to this liquid bag filling composite bag P, the volume efficiency of the liquid material (the volume of the liquid material / the height of the outer container) is generally more than twice that of the outer container shown in the prior art. The effect that it can be raised to the same level as the bottle can be expected.

  Further, in this liquid material filling composite bag P, the sealing structure 13 is formed by the butting of the four longitudinal ribs 17a to 17d at the four inner front end portions 16 as described above. The portion 12 'can be easily opened by pulling the two opposing vertical ribs, in FIG. 1, the vertical rib 17a and the vertical rib 17c, or the vertical rib 17b and the vertical rib 17d in a direction away from each other with fingers. After use, the inner bag 30 can be taken out from the outer bag 10 and separated for each material and discarded.

  In addition, the sheet-like nozzle 31 of the inner bag 30 is stored as shown by a dotted line between one of the four vertical ribs 17a to 17d, in FIG. 1, between a pair of standing walls of the vertical rib 17a. 17 a functions as the cover 19 of the sheet-like nozzle 31. Thereby, since the sheet-like nozzle 31 is protected from both the front and back sides by the cover 19 until the start of use, there is no possibility that the sheet-like nozzle 31 is deformed or erroneously opened during handling such as transportation. In addition, if at least a part of the sheet-like nozzle 31 is detachably attached or fused to the inner surface of the cover 19, the deformation of the sheet-like nozzle 31 can be further suppressed.

  Each of the vertical ribs 17a to 17d has a pair of overlapping standing walls attached or fused at least at the upper end. At this time, the inner bag is attached to the upper end of the pair of standing walls of the vertical rib 17a and the vertical rib 17c. In order to fix the inner bag 30 and the outer bag 10, it is preferable that the upper end portion of 30 is sandwiched and bonded or fused together.

  As shown in FIG. 5, the cover 19 can be cut along a planned separation line 20 made of a perforation or the like provided in the sealing structure portion 13, and a sheet-like shape positioned inside by cutting the cover 19. The nozzle 31 can be exposed to the outside.

  FIG. 6 is a perspective view showing another embodiment of the sealing structure portion 13 of the composite bag P for filling liquid material of the present invention. As shown in FIG. 6, the notch 37 is provided in the inner front-end | tip part 16 of each vertical rib 17a-17d. For this reason, the four vertical ribs 17a to 17d are held in an independent state, and even if the liquid filling composite back P is accidentally dropped during handling, the vertical ribs 17a to 17d are In order to absorb the impact by flexing flexibly or the like, it is possible to prevent the joining (between the walls) of the vertical ribs 17a to 17d from being peeled off or to be deformed. ) Can be kept in the original shape. In addition, when two opposing vertical ribs (vertical rib 17a and vertical rib 17c, or vertical rib 17b and vertical rib 17d) are pulled in a direction away from each other with fingers, the notch 37 becomes a starting point, and the sealing structure portion 13 can be opened easily.

  As shown in FIG. 7, when a cap 38 made of plastic or paper is detachably provided on the head of the outer bag 10, the liquid material filling composite back P is opened after the sheet-like nozzle 31 is opened. Even when stored for a long period of time, the spout of the sheet-like nozzle 31 exposed to the outside can be prevented from becoming dirty, so that it is hygienic.

The cap 38 may have any shape as long as it can cover at least the sheet-like nozzle 31 in addition to a clip type that sandwiches the vertical rib 17a portion from above as shown in FIG. It is preferable to provide a holding structure that can hold at least a part of the sheet-like nozzle 31 from both side surfaces. By this clamping structure, the force acting in the direction in which the extraction passage of the sheet-like nozzle 31 swells (the direction in which it opens) is suppressed, and the liquid-filling composite back P unexpectedly falls down after the sheet-like nozzle 31 is opened. Even if it happens, it is possible to prevent the liquid material from leaking out.
As the clamping structure, for example, as shown in the end view (FIG. 8) at the AA position in FIG. 7, the clamping parts are in contact with the inner surfaces of the pair of wall parts 39a and 39b constituting the cap 38. In addition to providing 40a and 40b (FIG. 8 (a)) and providing one or more irregularities 41a and 41b on the inner surfaces of the pair of wall portions 39a and 39b (FIG. 8 (b)), FIG. As shown in FIG. 9, any shape can be used as long as the sheet-like nozzle 31 can be sandwiched from both side surfaces, such as providing a U-shaped bent portion 42 in the length direction of the pair of wall portions 39 a and 39 b. There may be.

  FIG. 10 is a perspective view showing another embodiment of the composite bag P for filling liquid material of the present invention. In the composite bag P for filling a liquid material, a handle 43 is provided on the side of the cylindrical body 12 of the outer bag 10 (position of the seal portion 12b in the drawing). In this embodiment, the handle 43 is formed integrally with the cylindrical body 12, but the handle 43 may be formed separately from the cylindrical body 12, and in this case, A material can be used, and it is particularly preferable to use a material having higher rigidity than the plastic film constituting the cylindrical body 12.

  The handle 43 includes a window hole 44 and a grip part 45 on the outer periphery thereof, and a tongue piece 46 is provided on the inner edge (window hole 44 side) of the grip part 45 so as to protrude into the window hole 44. Therefore, when the handle 43 is gripped with fingers, the tongue piece 46 is bent and bent, and as a result, the handle 43 is gripped through the tongue piece 46, so that the handle 43 can be held firmly with fingers or held for a long time. Even so, it can be expected that the hand will not hurt.

  Note that a plurality of the grips 43 may be provided. In this case, the gripping position can be appropriately selected according to the remaining amount of the packaged item, the user's convenience, and the like. In FIG. 10, the tongue piece 46 is provided only on the inner edge of the gripping portion 45, but it may be provided on the outer edge of the gripping portion 45, and the tongue piece 46 may be provided on the rectangular window hole 44. The tongue pieces 46 are preferably provided at positions where the hand touches at least when the handle 43 is gripped.

  Further, the shape of the window hole 44 is not particularly limited. When the window hole 44 has a rectangular shape, it is preferable to add an R to the corner portion 47 as shown in FIG. It is possible to disperse the stress concentration on the grip 43 and to prevent the handle 43 from being cut from the corner portion 47.

  Next, the inner bag 30 will be described. As shown in FIG. 11 as an example, the inner bag 30 is made of a soft laminate film in which a single plastic film or a plurality of plastic films including one or more plastic films or metal foils are laminated, For example, various liquid materials such as liquid and viscous can be used that are filled and packaged by in-liquid seal filling. The laminate film comprises at least a uniaxial or biaxially stretched base film layer and a sealant layer, and the base film layer is made of a polyethylene terephthalate film, a nylon resin film, an ethylene vinyl alcohol film or the like having a thickness of 8 to 30 μm. The sealant layer is preferably composed of unstretched polyethylene or polypropylene having a thickness of 10 to 60 μm, an EVA layer, an ionomer layer, an EVOH layer, or the like. In particular, when the inner bag 30 is made of a plastic film having a waist, the generation of wrinkles on the inner bag 30 is suppressed and smooth pouring can be performed. When the composite bag P is tilted, the inner bag 30 can be prevented from sliding downward.

  In FIG. 11, the sheet-like nozzle 31 protrudes from the upper side portion of the inner bag 30, but the sheet-like nozzle 31 may protrude from the upper end portion of the inner bag 30. In addition, this sheet-like nozzle 31 can be opened by cutting a front-end | tip part along the notches 33, such as V notch provided near the front-end | tip part, for example. Moreover, it is preferable to provide a protrusion 34 for preventing dripping propagation at the lower edge portion of the sheet-like nozzle 31 at a position near the nozzle base end portion 31a in the vicinity of the expected opening position. The liquid material dripping from the opening is dripped onto the floor surface from the tip of the protrusion 34, and the inner bag 30 and the outer bag 10 can be prevented from being soiled by the dripping.

The sheet-like nozzle 31 is preferably made of a plastic laminate film including at least a base film layer and a sealant film layer laminated on both sides of the base film layer, and the plastic laminate film is provided on the front and back sides. In the overlapped state, the extraction passage 35 is defined in the central portion by heat fusion at the peripheral portion except for the base end portion 31a.
In particular, when the sheet-like nozzle 31 has a self-seal function, the liquid material in the inner bag 30 is poured out without inhaling outside air by tilting the inner bag 30 or pressing the inner bag 30. In stopping the pouring based on the standing return of the inner bag 30 or the release of the pressure to the inner bag 30, the inner bag 30 is exposed to the negative pressure accompanying the decompressed atmosphere in the inner bag 30, and the pouring passage of the sheet-like nozzle 31. The inner surfaces of the 35 are immediately brought into close contact with each other in the presence of a thin film of liquid material (flowed from the inner bag 30) adhering to the inner surface of the dispensing passage 35, thereby preventing the outside air from entering the inner bag 30. it can.

  Further, the sheet-like nozzle 31 crosses the dispensing passage from the planned opening position to the proximal end portion 31a side, preferably in the vicinity of the planned opening position, and is pressed by adhesion between the front and back plastic films constituting the sheet nozzle 31. It is preferable to have the processed part 36. For example, the pressing portion 36 bends or presses the laminated plastic films on the front and back surfaces with the required temperature and pressure in the same direction or in opposite directions with a pressing blade having a required cross-sectional shape. It can be formed by inflection, for example, composed of an inflection portion having a mountain-shaped cross section, a bent portion having a trapezoidal cross section, and the like.

  In the pressing portion 36 formed of the bent portion or the inflection portion thus formed, the laminated plastic films on the front and back of the pressing portion 36 are separated from each other by the liquid pressure of the liquid material flowing into the extraction passage 35. The laminated plastic film quickly returns to the original shape due to the elastic restoring force as the liquid material is stopped being poured out, and is closely adhered to each other in a linear or planar shape. The dispensing passage 35 of the nozzle 31 is automatically shut off. At this time, if the sheet-like nozzle 31 has the self-sealing function as described above, the liquid plastic is stopped before the laminated plastic films on the front and back sides at the position of the pressing portion 36 are brought into close contact with each other. The liquid material remaining in the outlet passage 35 and in the vicinity of the front end opening is exposed to the negative pressure accompanying the reduced pressure atmosphere in the inner bag 30 and sucked into the inner bag 30, so that the liquid breakage is improved, It is possible to effectively suppress potter dropping. In addition, when the plastic film of the front and back is closely_contact | adhering with the width | variety of 0.5-5.0 mm in the discharge direction of a liquid substance, the press process part 36 can improve liquid-cutting property more effectively. it can.

  The composite bag for filling a liquid material of the present invention can be widely used as a container for filling and packaging a liquid or viscous liquid material such as beverages, pharmaceuticals, and chemicals.

P Composite bag 10 for filling liquid material 10 'Outer bag 12 Cylindrical body 12' Upper end opening 13 Sealing structure 16 Inner tip 17a, 17b, 17c, 17d Vertical rib 18 Top wall 19 Cover 20 Scheduled disconnection line 25 Bottom portion 28 Fixing portion 30 Inner bag 31 Sheet-like nozzle 31a Base end portion 33 V notch 34 Protrusion 35 Outlet passage 36 Pressing portion 37 Cutting 38 Cap 39a, 39b Wall portion 40a, 40b Holding portion 41a, 41b Concavity and convexity 42 Bending Part 43 handle 44 window hole 45 gripping part 46 tongue piece 47 corner part

Claims (11)

A non-self-supporting inner bag made of a soft thin-walled plastic film filled with a liquid material inside, and an outer bag having a self-supporting cylindrical body made of a thick-walled plastic film that can store the inner bag inside. A composite bag for filling a liquid material,
The inner bag has a sheet-like nozzle for pouring liquid material at the upper end or upper side end,
The outer bag includes a sealing structure portion formed of at least three vertical ribs at an upper end portion of the cylindrical body portion.   The sealing structure portion is formed by a mountain-shaped top wall continuous to the upper edge of the cylindrical body, and three or more vertical ribs standing from the top wall, and the top surface of the vertical rib is horizontal. The composite bag for filling a liquid material according to claim 1.   3. The vertical rib according to claim 1, wherein each of the vertical ribs is formed of a pair of upright walls formed by folding and folding the side walls connected to the upper end edge of the cylindrical body portion outward. 4. Composite bag for filling liquids.   The liquid according to any one of claims 1 to 3, wherein the vertical ribs are arranged upright in a radial manner of 3 or more from a substantially central position of the outer bag in a plan view of the outer bag. Composite bag for filling things.   One of the vertical ribs is a cover vertical rib for sandwiching the liquid material pouring sheet-like nozzle, and the cover vertical rib has a planned separation line that can expose the liquid material pouring sheet-like nozzle. The composite bag for filling a liquid material according to claim 1, wherein the composite bag is filled with a liquid material.   6. The composite bag for filling a liquid material according to claim 1, wherein the outer bag has a bottom part of the bottom of the cylindrical body that assists independence at the lower end of the cylindrical body.   The said inner bag has a fixing | fixed part joined to the said outer bag at least at an upper end part, The composite bag for liquid substance filling of any one of Claims 1-6 characterized by the above-mentioned.   The cylindrical body portion of the outer bag has a cylindrical shape with substantially the same opening cross section over the entire length from the lower end to the sealing structure portion of the upper end portion. A composite bag for filling a liquid as described.   The said outer bag attaches the removable cap for covering the said sheet-like nozzle for liquid substance extraction to the said sealing structure part, The any one of Claims 1-8 characterized by the above-mentioned. Composite bag for filling liquids.   10. The thin plastic film of the inner bag has a thickness of 20 μm or more and less than 80 μm, and the thick plastic film of the outer bag has a thickness of 80 μm or more and 300 μm or less. 2. A composite bag for filling a liquid material according to claim 1.   The cylindrical body portion of the outer bag has at least one handle, and a tongue piece is provided on at least an inner edge of the grip portion of the handle. A composite bag for filling a liquid material according to Item.

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