JP2017145028A - Package containing granular material and packaging bag for granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package containing a granular material which can keep a packaging bag accommodating a granular material in a deaerated state even after opening.SOLUTION: A package 10 containing a granular material comprises: a packaging bag 12 made of one or more sheets; a granular material 14 accommodated in the packaging bag 12; a take-out port through which the granular material 14 can be taken out from the inside of the packaging bag 12 by opening, and which can be resealed even after opening; and a check valve 24 which inhibits inflow of gas into the packaging bag 12 while allowing outflow of gas from the inside of the packaging bag 12 and is disposed at a position away from a storage region 28 that is a region in the packaging 12 where the granular material 14 is accumulated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a powder-containing package including a granular material and a packaging bag that accommodates the granular material, and a powder packaging bag that can accommodate the granular material.

  2. Description of the Related Art Conventionally, there is known a packaging bag with a check valve that can deaerate the inside of a packaging bag after a check valve is provided on the packaging bag made of a sheet material and the contents are accommodated (for example, Patent Document 1). However, many of the conventional packaging bags with a check valve are configured to accommodate items that are sufficiently large with respect to the check valve, such as clothing or futons, or items that are easily changed in shape, such as liquid. It was. In other words, conventionally, there are few check valve-equipped packaging bags suitable for containing solids, each of which is small with respect to the check valve and does not change its shape, like a granular material.

Japanese Patent No. 4729650 Japanese Utility Model Publication No. 5-42147

  Here, Patent Document 2 discloses a food packaging bag for storing powdered and granular foods. This packaging bag is equipped with a plastic film check valve on the side edge of the plastic film bag body, and allows gas to pass through the check valve into the bag insertion part and filtration that does not allow powder particles to pass through. The surface is formed. According to the packaging bag having such a configuration, the granular material is prevented from being caught inside the check valve.

  However, the peripheral edge of the packaging bag of Patent Document 2 is completely closed, and a part of the packaging bag is cut out to take out the contents in the packaging bag. Here, granular foods such as rice and wheat flour, and granular chemicals such as granular aromatic materials and powdered detergents are often contained in a certain amount in a single packaging bag. In the case of such a configuration, the user often uses ring dust, an adhesive tape, or the like to seal again after opening the packaging bag and taking out a necessary amount of powder particles. However, in such a re-sealing method in which the opening is partially closed, the inside of the packaging bag and the outside air easily communicate with each other, leading to deterioration of the remaining powder particles and an increase in volume. The technique of Patent Document 2 cannot solve such a problem.

  Accordingly, an object of the present invention is to provide a powder-containing package that can maintain a degassed packaging bag containing powder and a powder packaging bag even after opening. .

  The granular material-containing package of the present invention is a granular material configured so as to be resealable, a packaging bag having at least a pair of opposing body sheets, a granular material accommodated in the packaging bag, and the like. And a check valve that inhibits the inflow of gas into the packaging bag while allowing the gas to flow out of the packaging bag, the check valve It has a degassing inlet that is an inflow port and a degassing outlet that is a discharge port of the gas, and is arranged in a position away from a storage area in the packaging bag where the granular material is accumulated. It is characterized by being.

  In a preferred aspect, the inside of the check valve is isolated from the external space. In this case, it is desirable that the deaeration outlet of the check valve is sealed. In addition, it is also desirable that the packaging bag has a small bag space that is completely cut off from the storage region and the external space, and the deaeration outlet of the check valve is arranged in the small bag space. .

  In another preferable aspect, an inflow inhibition mechanism that inhibits the powder from flowing into the check valve is further provided between the storage region and the check valve. In this case, it is desirable that the inflow inhibition mechanism is an inhibition seal portion formed by joining a part of the pair of body portion sheets to each other. Moreover, it is also desirable that the inflow inhibition mechanism is an internal gusset sheet joined to the inner surfaces of the pair of body part sheets.

  In another preferred aspect, the check valve is disposed within the width and height of the packaging bag. In another preferred aspect, the take-out port includes a tube body communicating with the inside and the outside of the packaging bag and a cap that can be attached to and detached from the tube body by screwing. In another preferred aspect, the outlet is an openable / closable zipper joined to the inner surfaces of the pair of trunk sheets.

  Another packaging bag for granular material according to the present invention is a packaging bag for granular material that has at least a pair of opposed body sheet sheets and accommodates the granular material therein, and can be resealed. The outlet of the granular material, and a check valve that inhibits the inflow of gas into the packaging bag while allowing the gas to flow out of the packaging bag. And a degassing inlet that is a gas inlet in the packaging bag, and a degassing outlet that is the gas outlet, and is a region in which the granular material is accumulated in the packaging bag. It is arranged at a position spaced from the storage area.

  Since the packaging body or packaging bag of the present invention has a resealable outlet and a check valve, the packaging bag containing the granular material can be maintained in an evacuated state even after opening. .

It is a front view of the granular material containing package body which is 1st embodiment of this invention. It is a schematic sectional drawing in the AA of FIG. It is a front view of another granular material containing package. It is a front view of another granular material containing package. It is a schematic sectional drawing in the DD line | wire of FIG. It is a front view of the granular material containing package body which is 2nd embodiment. It is a front view of another granular material containing package. It is a front view of another granular material containing package. It is a front view of another granular material containing package. It is a perspective view of the granular material containing package body of FIG. It is a front view of another granular material containing package. It is a schematic sectional drawing in the HH line of FIG. It is a front view of another granular material containing package.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the side in which the granular material 14 that is the contents is accumulated in the packaging bag 12 is called “bottom side” or “lower side”, and the side opposite to the “bottom side” is “top side” or “upper side”. Call it. The direction perpendicular to the up-down direction and the thickness direction of the packaging bag 12 is referred to as the “width direction” or “left-right direction” of the packaging bag 12.

  FIG. 1 is a front view of a powder-containing package 10 that is a first embodiment of the present invention. 2 is a schematic cross-sectional view taken along the line AA in FIG. In each figure, cross hatching indicates a seal portion where sheets are joined, and gray hatching indicates a powder or granular material.

  The granular material-containing package 10 is obtained by filling a granular material 14 as a content into a packaging bag 12 formed by joining a plurality of sheets. The granular material 14 as the content is not particularly limited as long as it is a powdery or granular solid. Therefore, the granular material 14 may be, for example, a granular food such as rice, wheat flour or sugar, or a granular chemical such as a granular fragrance or a powdered detergent. In addition, since the granular material containing package 10 of this embodiment has a deaeration function so that it may explain in full detail later, the granular material 14 which is easy to change and deteriorate by contact with moisture or air (oxygen). Especially suitable for preservation. Moreover, since the granular material containing package 10 of this embodiment has the resealable outlet (spout 22 and cap), it is especially suitable for the preservation | save of the granular material 14 used little by little. Yes.

  The packaging bag 12 is a so-called pouch container configured by joining a plurality of sheets 16. The packaging bag 12 of the present embodiment is a standing pouch provided with a pair of body sheet 16 and a bottom gusset sheet (not shown). A pair of trunk | drum sheet | seat 16 comprises the trunk | drum of the packaging bag 12, and is opposingly arranged. The bottom gusset sheet is inserted between the pair of body sheets 16 in a folded state to form a bottom gusset (town). The bottom gusset sheet is folded in a mountain direction toward the top and is developed by filling the contents. The internal space of the packaging bag 12 surrounded by each sheet is a space filled with contents. When the granular material 14 is erected, it accumulates mainly on the bottom side of the internal space of the packaging bag 12. Hereinafter, in this internal space, an area in which the powder particles 14 accumulate when the packaging bag 12 is erected is referred to as a “storage area 28”.

  The packaging bag 12 has a seal portion configured by inserting a bottom gusset sheet between a pair of body sheets 16 and joining the edges of each sheet in this state. The packaging bag 12 of the present embodiment includes a top seal part 30, a side seal part 32, a bottom seal part 34, a point seal part 36, and an oblique side seal part 38 as seal parts. The top seal portion 30 is a seal portion that closes the upper portion of the packaging bag 12. The bottom seal portion 34 is configured by sealing along the peripheral edge of the bottom gusset sheet in a state where the folded bottom gusset sheet is sandwiched between the pair of body portion sheets 16. The point seal portion 36 is a seal portion provided in the bottom seal portion 34. The point seal portion 36 is configured by joining a pair of trunk sheets 16 to each other through a substantially semicircular cutout formed in the bottom gusset sheet. By providing such a point seal portion 36, the pair of body portion sheets 16 are directly joined, and the packaging bag 12 is stably self-supporting. Among the pair of body sheets 16, a hypotenuse 40 is formed at one corner of the top. The hypotenuse seal portion 38 is configured by sealing the pair of trunk section sheets 16 in the hypotenuse section 40 with the spout 22 sandwiched between the pair of trunk section sheets 16.

  Each sheet is made of, for example, a resin film. The resin film is required to have basic performance as the package 10 such as impact resistance, wear resistance, and heat resistance. The thickness of the sheet material is, for example, 20 μm to 300 μm, and preferably 30 μm to 200 μm. Moreover, since each seal part is preferably formed by heat sealing, the sheet is also required to have heat sealability. As the sheet, a multilayer sheet having a base film layer and a sealant layer that imparts heat sealability is suitable, and when high gas barrier properties are required, a gas barrier is provided between the base film layer and the sealant layer. It is preferred to provide a layer. In addition, you may provide barrier property to base film layer itself. In this case, a multilayer sheet having a barrier layer and a sealant layer is obtained using the barrier layer as a base film layer.

  Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are exemplified. Lamination of each layer can be performed by a conventional laminating method, for example, dry lamination with an adhesive, thermal lamination in which a heat-adhesive layer is sandwiched by heat.

  Examples of the film constituting the base film layer include polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene ( PP)), polyamide (nylon-6, nylon-66, etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), and A stretched or unstretched film of one layer or two or more layers composed of polyethersulfone (PES) or the like can be exemplified. The thickness of the base film layer is, for example, 10 μm to 200 μm, preferably 10 μm to 100 μm.

  The films constituting the sealant layer include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), and biaxially stretched nylon (ON). , Ethylene-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. A stretched or unstretched film can be exemplified. The thickness of the sealant layer is, for example, 10 μm to 200 μm, and preferably 20 μm to 180 μm.

  The gas barrier layer may be a metal sheet such as aluminum, a resin film such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or any synthetic resin film (for example, a base film layer). ), And a film obtained by vapor-depositing (or sputtering) an inorganic oxide such as aluminum, aluminum oxide or silica. The thickness of the gas barrier layer is, for example, 0.1 μm to 20 μm, preferably 0.2 μm to 10 μm.

  A spout 22 is fixed to the end of the packaging bag 12. The spout 22 is a tube that communicates with the inside and outside of the packaging bag 12. The granular material 14 in the packaging bag 12 is poured out through the spout 22. A male screw is formed on the outer peripheral surface of the spout 22, and a cap (not shown) can be screwed together. And even after removing a cap from the spout 22 and opening once, the spout 22 can be resealed by screwing the cap again. Accordingly, the spout 22 and the cap function as a resealable outlet.

  As is apparent from FIG. 1, the spout 22 is fixed to the oblique side portion 40 of the trunk portion sheet 16. By fixing the spout 22 to the oblique side portion 40, the spout 22 can be accommodated within the width and height of the trunk portion. That is, the spout 22 can be disposed at a position that does not protrude from the line Lh and the line Lw in FIG. When the spout 22 is fixed to the packaging bag 12, the pair of trunk sheets 16 is heat-sealed in the state where the spout 22 is sandwiched between the pair of trunk sheets 16 at the oblique side portion 40.

  Further, a check valve 24 is also fixed to the packaging bag 12. The check valve 24 is a member that prohibits the passage (inflow) of gas from the outside to the inside of the packaging bag 12 while allowing the passage (outflow) of gas from the inside to the outside of the packaging bag 12. As shown in FIG. 1, the check valve 24 is arranged in the upper right corner of the packaging bag 12 and within the width and height of the packaging bag 12. Various configurations of the check valve 24 are conceivable, but the check valve 24 of the present embodiment is formed by joining a plurality of sheets. This will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. In FIG. 2, the bold line portion indicates a seal portion in which adjacent sheets are joined to each other.

  The check valve 24 includes a pair of exterior sheets 42 and a valve sheet 44 sandwiched between the pair of exterior sheets 42, and has a substantially flat sheet shape as a whole. The exterior sheet 42 is a substantially rectangular sheet. The valve seat 44 is a substantially rectangular sheet having the same width as the exterior sheet 42. The pair of exterior sheets 42 are joined to each other in the width direction with the valve seat 44 sandwiched therebetween. By this joining, a deaeration channel 45 through which a fluid flows is formed between the pair of exterior sheets 42, and the valve seat 44 is arranged in the deaeration channel 45. The gas in the packaging bag 12 enters the deaeration channel 45 from the upstream end of the deaeration channel 45 (hereinafter referred to as “degassing inlet 46”), and the downstream end (hereinafter referred to as “degassing” of the deaeration channel 45). From the air outlet 48 ").

  Of the valve seat 44, the upstream end portion is joined to one exterior sheet 42 to form a fixed end, and the downstream end portion constitutes a free end that is not joined to any exterior sheet 42. In the no-load state, as shown in FIG. 2A, the exterior sheet 42 and the valve seat 44 are in close contact with each other and shield the deaeration channel 45 at the downstream end. 2A, in order to facilitate understanding, between the valve seat 44 and the right exterior sheet 42 on the upstream side and between the valve seat 44 and the left exterior sheet on the downstream side. 42 is shown with a gap between them. However, actually, in a no-load state, the valve seat 44 and the exterior sheet 42 are in close contact with each other without a gap.

  When the pressure in the packaging bag 12 becomes higher than the external pressure, the valve seat 44 is applied with a force F1 in the forward flow direction, that is, from the inside to the outside of the packaging bag 12. The valve seat 44 receiving the force F1 is separated from the other exterior sheet 42 as shown in FIG. Thereby, the deaeration channel 45 is opened, and the gas in the packaging bag 12 is released to the outside. On the other hand, when the external air pressure becomes higher than the pressure in the packaging bag 12, a force F <b> 2 is applied to the valve seat 44 in the reverse flow direction, that is, from the outside to the inside of the packaging bag 12. Even if the force F2 is received, the valve seat 44 does not move, so that the ingress of gas from the outside to the inside of the packaging bag 12 is hindered.

  As shown in FIG. 1, the packaging bag 12 further includes a storage space 28 and a small bag space 26 that is isolated from the external space. The pouch space 26 is configured by surrounding the periphery thereof with a seal portion. In the present embodiment, a substantially L-shaped partition seal portion 27 having one end connected to the top seal portion 30 and the other end connected to the side seal portion 32 is formed. Thereby, the pouch space 26 surrounded by the top seal portion 30, the side seal portion 32, and the partition seal portion 27 is formed.

  The check valve 24 is disposed at a position where the deaeration outlet 48 is located in the pouch space 26 and the deaeration inlet 46 communicates with the storage area 28. When the packaging bag 12 is evacuated, a part of the sachet space 26 is cut away (for example, cut along line B in FIG. 1), and the sachet space 26 and the external space, as a result, the deaeration outlet 48. What is necessary is just to communicate with external space.

  Next, the flow of use of the powdered body-containing package 10 will be described. If the manufacturer of the package 10 with the granular material fills the powder 14 in the packaging bag 12, the spout 22 is fixed to the packaging bag 12 and the packaging bag 12 is deaerated. This deaeration is performed using a dedicated device provided in the manufacturing factory. By being deaerated, the body part sheet 16 and the bottom gusset sheet constituting the packaging bag 12 are in close contact with the granular material 14 which is the contents, and the size of the entire packaging body 10 is reduced.

  The manufactured granular material-containing package 10 is transported, transported to a store, and displayed. At this time, since the packaging bag 12 is deaerated and reduced in size, the transportation cost can be reduced. Moreover, the sheet | seat which comprises the deaerated packaging bag 12 is closely_contact | adhered to the granular material 14 which is the content. For this reason, the packaging bag 12 is not easily damaged, and in the event of damage, the degassing is released and the bag is inflated. Further, the check valve 24 is disposed in the packaging bag 12 and is isolated from the external space. For this reason, the interior of the check valve 24 is not exposed to the outside air during transportation and display. As a result, contamination inside the check valve 24, contamination of the granular material 14 through the check valve 24 and the like can be effectively prevented.

  The powder-containing package 10 is displayed and sold at the store. The user who has obtained the granular material-containing package 10 removes and opens the cap attached to the spout 22 as necessary, and takes out the granular material 14 accommodated from the spout 22. Specifically, the user tilts the packaging bag 12 so that the spout 22 faces downward, and moves the granular material 14 from the bottom side to the top side.

  When the granular material 14 remains in the packaging bag 12 after use, the user attaches the cap to the spout 22 again and reseals the packaging bag 12. Here, when the packaging bag 12 is once opened, outside air flows into the packaging bag 12 from the spout 22. Thereafter, even if the spout 22 is closed with the cap, a large amount of air remains in the packaging bag 12, and the remaining granular material 14 may be oxidized or moistened. Therefore, if the user reseals the packaging bag 12, the user degass the packaging bag 12. When performing deaeration, first, a part of the sachet space 26 is broken, and the sachet space 26 and the external space, and thus the deaeration outlet 48 of the check valve 24 and the external space are communicated. In this state, pressure is applied to the packaging bag 12 to make the pressure in the packaging bag 12 higher than the outside air. Thereby, the valve seat 44 of the check valve 24 moves, the deaeration channel 45 is opened, and the air in the packaging bag 12 is released to the outside. When pressure is applied to the packaging bag 12, the packaging bag 12 may be simply pressed, but it is better to wind the packaging bag 12 in a roll shape from the bottom side. Since air is pushed out in order from the bottom side by winding in a roll shape, it can deaerate more effectively.

  If the packaging bag 12 can be sufficiently deaerated, the user stores the package 10 in that state until the next use. At this time, since the air inside the packaging bag 12 is excluded, the oxidation and moisture absorption of the granular material 14 can be effectively prevented. Moreover, by deaeration, the size of the packaging bag 12 can also be reduced and a storage space can be reduced. Thereafter, the user repeats the same procedure for each use.

  As is clear from the above description, the granular material-containing package 10 of the present embodiment includes a spout 22 that can be repeatedly opened and sealed, and a check valve 24 that can be easily deaerated. Therefore, even after the packaging bag 12 is opened once, the granular material 14 can be stored while being protected from oxidation and moisture. As a result, user convenience can be further improved. In the present embodiment, a small bag space 26 isolated from the external space and the storage region 28 is formed in the packaging bag 12, and a deaeration outlet 48 of the check valve 24 is disposed in the small bag space 26. Therefore, unless a part of the pouch space 26 is excised, the inside of the check valve 24 is isolated from the external space. As a result, it is possible to reliably prevent the inside of the check valve 24 and the contents (powder particles 14) from being contaminated during transportation or store display. Further, as is apparent from FIG. 1, in this embodiment, the check valve 24 is disposed within the width and height of the packaging bag 12. Therefore, the entire package 10 can be accommodated in a substantially rectangular range, and handling with an existing bag making machine is facilitated.

  In addition, the structure demonstrated so far is an example, and if it is the granular material containing package 10 provided with the resealable exit and the non-return valve 24, other structures will be changed suitably. May be. For example, in the present embodiment, the check valve 24 is configured by a pair of the exterior sheet 42 and the valve seat 44, but the configuration of the check valve 24 may be changed as appropriate, and is conventionally known. Other configurations may be used. Other configurations of the check valve 24 include those disclosed in, for example, Japanese Patent No. 445879, Japanese Patent No. 4729650, Japanese Patent No. 4809490, Japanese Utility Model Laid-Open No. 5-42147, and the like.

  Further, in the present embodiment, the outlet having the spout 22 and the cap is used, but the outlet may have another configuration as long as it can be resealed. For example, in the example of FIG. 1, an outlet made up of a substantially tubular spout 22 and a cap is used, but the outlet may have other configurations as long as it can be resealed. For example, as shown in FIG. 3, an openable / closable zipper 50 joined to the inner surfaces of the pair of trunk sheets 16 may be used as the outlet. The zipper 50 is provided below the top seal portion 30 of the packaging bag 12, and is opened by cutting the packaging bag 12 between the top seal portion 30 and the zipper 50 (for example, along the line C). Is formed. This opening can be resealed by closing the zipper 50. Various configurations of the zipper 50 are conceivable. For example, the zipper 50 has a male side zipper joined to one of the pair of body sheets 16 and a female side zipper joined to the other. The male zipper has a substantially semicircular protrusion in cross section, and the female zipper has a groove into which the protrusion can be fitted. The zipper 50 is closed by fitting a protrusion into the groove.

  When the zipper 50 is used as a resealable outlet, the check valve 24 is provided at a position where it does not interfere with the zipper 50. In the example of FIG. 3, a small bag space 26 is formed in the upper right corner of the packaging bag 12 and is surrounded by a substantially L-shaped partition seal portion 27, a top seal portion 30, and a side seal portion 32. The zipper 50 is disposed only on the left side of the small bag space 26, and the check valve 24 is disposed so that the deaeration outlet 48 is located in the small bag space 26. When the packaging bag 12 is opened, if the packaging bag 12 is cut along the line C, the deaeration outlet 48 can communicate with the external space, and the check valve 24 can be used.

  Further, the posture of the check valve 24 is not particularly limited. Therefore, the check valve 24 may be arranged such that the deaeration channel 45 extends in the width direction, as shown in FIG. Even in this case, the inside of the check valve 24 is preferably isolated from the external space.

  In the above, only a configuration in which a part of the sachet space 26 is excised and the sachet space 26 and the external space communicate with each other is illustrated. However, the sachet space 26 can communicate with the external space as needed. Other configurations may be used. For example, a through hole may be formed in a part of the pouch space 26, and a tack seal that covers and closes the through hole may be provided. In this case, when degassing is desired, the tack seal is peeled off and the through hole is exposed to the outside.

  Further, the check valve 24 may have a configuration without the pouch space 26 as long as the inside thereof is isolated from the external space. For example, as shown in FIGS. 4 and 5, the downstream ends of the pair of exterior sheets 42 may be sealed by heat sealing each other. By adopting such a configuration, the inside of the check valve 24 and the inside of the packaging bag 12 can be isolated from the outside air until the user actually starts use. In this case, the user cuts the check valve 24 in the vicinity of the line E in FIGS. 4 and 5 and cuts the seal portion at the downstream end. As a result, the check valve 24 can communicate with the outside air, and the deaeration operation can be performed. Moreover, it is good also as a structure which seals the downstream end of the non-return valve 24 with a tack seal etc. instead of a heat seal. In any case, the inside of the packaging bag 12 can be isolated from the external space by isolating the inside of the check valve 24 from the external space before the start of use.

  Next, a second embodiment will be described with reference to FIG. FIG. 6 is a front view of the powder-containing package 10 of the second embodiment. Unlike the granular material containing package 10 of FIG. 1, the granular material containing package 10 is arranged such that a check valve 24 protrudes from the upper end of the packaging bag 12. Moreover, although the granular material containing package 10 of this embodiment does not have the pouch space 26, it has an inflow inhibition mechanism. The inflow inhibition mechanism is a mechanism that inhibits the inflow of the granular material 14 into the check valve 24. In the present embodiment, the inflow inhibition mechanism is configured by an inhibition seal portion 52 in which a pair of body portion sheets 16 are partially joined.

  The inhibition seal portion 52 is a seal portion that functions as an inflow inhibition mechanism that inhibits the inflow of the granular material 14 into the check valve 24. That is, as described above, the check valve 24 inhibits unintentional inflow of outside air by the valve seat 44 being in close contact with the exterior sheet 42. When the granular material 14 is sandwiched between the valve seat 44 and the exterior sheet 42, the airtightness of the valve seat 44 is hindered, and the backflow prevention function of the check valve 24 is impaired. In the present embodiment, the inhibition seal portion 52 is provided between the granular material 14 and the check valve 24, thereby effectively preventing the granular material 14 from entering the check valve 24.

  As long as the blocking part 52 for inhibition is located between the storage area 28 of the granular material 14 and the check valve 24, the position and shape thereof are not particularly limited. The inhibition seal portion 52 of the present embodiment has a substantially L shape including a first portion 52a extending in the width direction and a second portion 52b extending from one end of the first portion 52a to the top side. The first portion 52 a is disposed at a position slightly below the deaeration inlet 46 of the check valve 24, and the other end is connected to the side seal portion 32. The second part 52 b is disposed slightly to the left of the check valve 24 and slightly to the bottom of the top seal part 30. In the present embodiment, the width of the second part 52b of the blocking seal part 52 is made larger than the width of the first part 52a, and the through hole 52c is provided inside the second part 52b. This through-hole 52c functions as a suspending hole when the packaging body 10 is suspended and displayed, for example.

  The gas in the packaging bag 12 passes through the flow path formed by the gap between the inhibition seal portion 52 and the top seal portion 30 and the gap between the inhibition seal portion 52 and the check valve 24 to the deaeration inlet 46. And flow into. Providing such a blocking seal 52 effectively prevents the powder 14 in the packaging bag 12 from flowing into the check valve 24. That is, when the packaging bag 12 is tilted, the granular material 14 moves to the top side, that is, the check valve 24 side, but reaches the inhibition seal portion 52 before reaching the check valve 24, and further Progress is inhibited. In particular, in the present embodiment, the three directions around the deaeration inlet 46 are surrounded by the seal portion. By adopting such a configuration, the movement of the granular material 14 to the check valve 24 is more effectively prevented. As a result, it is possible to more effectively prevent the granular material 14 from being sandwiched inside the check valve 24. As a result, the inside of the packaging bag 12 can be kept in a deaerated state more reliably.

  In addition, the structure demonstrated so far is an example, and if it is the granular material containing package 10 provided with the spout 22 which can be resealed, and the non-return valve 24, another structure will be changed suitably. May be. For example, as shown in FIG. 7, a zipper 50 may be used instead of the spout 22 as an outlet. In the example of FIG. 7, the zipper 50 is provided below the top seal portion 30 of the packaging bag 12, and the packaging bag 12 is placed between the top seal portion 30 and the zipper 50 (for example, along the line F). By cutting, an opening is formed.

  Further, the position and posture of the check valve 24 may be changed as appropriate. For example, as shown in FIG. 7, the check valve 24 may be arranged in a position and posture such that the deaeration channel extends in the width direction and protrudes to the outside from the width direction end of the packaging bag 12. . Further, as shown in FIG. 8, a configuration is provided in which a second oblique side portion 58 is provided at a corner opposite to the oblique side portion 40 to which the spout 22 is secured, and the check valve 24 is secured to the second oblique side portion 58. It is good. In this case, it is desirable that the check valve 24 be arranged at a position and posture that does not protrude from the width and height of the packaging bag 12 (does not protrude from the lines Lh and Lw in FIG. 8). By setting it as this structure, the whole package 10 can be stored in the substantially rectangular range, and the handling with the existing bag making machine becomes easy.

  In the description so far, the inhibition seal portion 52 has a substantially L shape in which one end is connected to the side seal portion 32 and the other end is close to the top seal portion 30. However, as long as the inhibition seal portion 52 is located between the storage region 28 and the check valve 24, the position and shape thereof may be changed as appropriate. For example, as shown in FIG. 7, the blocking seal portion 52 may have a linear shape extending in the width direction at a position slightly below the check valve 24. In this case, one end of the blocking seal portion 52 may be connected to the side seal portion 32 as shown in FIG. 7, or a narrow gap (passage) is formed between the end seal portion 52 and the side seal portion 32 without being connected. May be. Even in this case, the blocking seal portion 52 is interposed between the check valve 24 and the granular material 14, thereby effectively preventing the granular material 14 from flowing into the check valve 24.

  Further, the inhibition seal portion 52 is not limited to a straight line, but may be a curved line. For example, as shown in FIG. 8, the inhibition seal portion 52 may have a substantially arc shape surrounding three sides of the check valve 24. In addition, if the sandwiching of the granular material 14 is effectively prevented, it is desirable that the blocking seal portion 52 has a shape surrounding three directions around the deaeration inlet 46.

  Moreover, in this embodiment, in order to inhibit the inflow of the granular material 14 into the check valve 24, the inhibition seal portion 52 is provided, but instead of the inhibition seal portion 52, other members are used. You may inhibit the inflow of the granular material 14. For example, an internal gusset sheet 60 may be provided inside the packaging bag 12, and the internal gusset sheet 60 may be used as an inflow inhibition mechanism. This configuration will be described with reference to FIGS. FIG. 9 is a front view of another powder-containing package 10, and FIG. 10 is a perspective view of another powder-containing package 10. In addition, in FIG. 10, illustration of the check valve 24 and the zipper 50 is omitted for easy viewing.

  In FIG. 9, the packaging bag 12 has a zipper 50 at a slightly lower position than the top seal portion 30, and is cut along a cut line G between the top seal portion 30 and the zipper 50. The packaging bag 12 is opened. A check valve 24 is fixed to a position slightly below the zipper 50.

  In the packaging bag 12, an internal gusset sheet 60 is fixed to a position slightly below the check valve 24. The internal gusset sheet 60 is a substantially rectangular sheet, and is sandwiched between the pair of trunk sheets 16 in a state of being valley-folded downward. While sandwiching the internal gusset sheet 60, the peripheral edge of the packaging bag 12 is heated and pressurized to form the side seal portion 32 and the bottom seal portion 34, and the upper edge of the internal gusset sheet 60 is also heated and pressurized. The upper edge of the internal gusset sheet 60 is heat sealed to the inner surface of the corresponding body sheet 16.

  When the packaging bag 12 configured in this manner is filled with the contents (granular body) in the packaging bag 12, the folded internal gusset sheet 60 is developed. As shown in FIG. 10, the developed internal gusset sheet 60 becomes a wall that partially covers the upper part of the granular material 14. In the present embodiment, the check valve 24 is provided on the top side of the internal gusset sheet 60 serving as the wall. In this case, when the packaging bag 12 is tilted, the granular material 14 moves to the top side, that is, the check valve 24 side, but reaches the internal gusset sheet 60 before reaching the check valve 24. As a result, the granular material 14 is effectively prevented from flowing into the check valve 24. Moreover, in this embodiment, since the trunk | drum sheet | seats 16 are not joined by heat sealing, the expansion of the packaging bag 12 is not inhibited, and after filling the content, the beauty | look of the package 10 with a granular material is received. There is no loss.

  In addition, the shape of the internal gusset sheet 60 shown here is an example, and if the wall which covers a part above the granular material 14 is formed in the packaging bag 12, the shape of the internal gusset sheet 60 is , May be changed as appropriate. For example, the internal gusset sheet 60 may have a shape in which a through hole is formed at the center in the width direction while extending over the entire width of the packaging bag 12.

  As another form, a perforated sheet 62 that covers the periphery of the deaeration inlet 46 of the check valve 24 may be used as the inflow inhibition mechanism instead of the inhibition seal portion 52 and the internal gusset sheet 60. This configuration will be described with reference to FIGS. FIG. 11 is a front view of another powder-containing package 10 and FIG. 12 is a cross-sectional view taken along the line H-H in FIG. 11.

  In FIG. 11, a small bag 64 made of a perforated sheet 62 is fixed to the check valve 24. The perforated sheet 62 is a sheet in which a plurality of small holes through which gas can pass are formed. 11 and 12, the perforated sheet 62 is folded in half so as to sandwich the deaeration inlet 46 of the check valve 24, and the periphery of the perforated sheet 62 is joined to constitute a small bag 64. As a result, the deaeration inlet 46 is surrounded by the perforated sheet 62.

  In such a configuration, the perforated sheet 62 is interposed between the deaeration inlet 46 and the storage region 28 in which the granular material 14 is accumulated. In addition, although the perforated sheet 62 is interposed, the gas can reach the deaeration inlet 46, but it is difficult for the granular material 14 to move to the deaeration inlet 46. As a result, inflow of the granular material into the check valve 24 is effectively prevented while allowing deaeration by the check valve 24.

  Moreover, as another form, the structure which isolate | separates the inside of the non-return valve 24 demonstrated in 1st embodiment from external space, and the inflow inhibition mechanism demonstrated in 2nd embodiment may be combined suitably. . For example, as shown in FIG. 13, the deaeration outlet 48 of the check valve 24 may be disposed in the sachet space 26, and the inhibition seal portion 52 may be formed near the deaeration inlet 46 of the check valve 24. .

  As another form, in the package 10 shown in FIGS. 1 and 3 to 4, an inhibition seal portion 52, an internal gusset sheet 60, a perforated sheet are provided in the vicinity of the deaeration inlet 46 of the check valve 24. A small bag 64 made of 62 may be provided. In any case, by combining the first embodiment and the second embodiment, it is possible to effectively prevent contamination inside the check valve 24 and the inside of the packaging bag 12, while maintaining the powder inside the check valve 24. The inflow of particles can be effectively prevented.

  In addition, until now, only the configuration in which the inside of the check valve 24 is isolated from the external space or the configuration having an inflow inhibition mechanism that inhibits the inflow of the granular material 14 into the check valve 24 has been exemplified. If the package 10 includes a resealable outlet and a check valve 24, the inside of the check valve 24 may not be isolated from the external space, and there is no inflow inhibition mechanism. It does not have to be. In addition, a standing pouch having a bottom gusset sheet has been exemplified so far. However, the shape of the packaging bag 12 is not limited to this, and both the shape having a side gusset sheet, the bottom gusset sheet, and the side gusset sheet are used. A flat bag shape not provided, a box shape having a substantially flat bottom surface, or the like may be used.

DESCRIPTION OF SYMBOLS 10 Packing body with granular material, 12 Packaging bag, 14 Powder body, 16 Body sheet, 22 Spout, 24 Check valve, 26 Small bag space, 27 Partition seal part, 28 Storage area, 30 Top seal part, 32 Side seal part, 34 Bottom seal part, 36 Point seal part, 38 Oblique side seal part, 40 Oblique side part, 42 Exterior sheet, 44 Valve seat, 45 Deaeration flow path, 46 Deaeration inlet, 48 Deaeration outlet, 50 Zipper, 52 Inhibition seal, 58 second hypotenuse, 60 internal gusset sheet, 62 perforated sheet, 64 sachets.

Claims (11)

A packaging bag having at least a pair of opposite body sheet;
Powder particles contained in the packaging bag;
An outlet for the granular material configured to be resealable;
A check valve that inhibits inflow of gas into the packaging bag while allowing outflow of gas in the packaging bag;
With
The check valve has a degassing inlet that is a gas inlet in the packaging bag, and a degassing outlet that is the gas outlet, and the granular material in the packaging bag It is arranged at a position away from the storage area where
A packaged product with a granular material. It is a granular material containing package of Claim 1, Comprising:
An inside of the check valve is isolated from an external space. It is a packing bag with a granular material according to claim 2,
A package with a granular material, wherein a deaeration outlet of the check valve is sealed. It is a packing bag with a granular material according to claim 2,
The packaging bag has a small bag space completely cut off from the storage area and the external space;
The deaeration outlet of the check valve is arranged in the pouch space,
A packaged product with a granular material. It is a granular material-containing package according to any one of claims 1 to 4, further comprising:
An inflow blocking mechanism that inhibits the powder from flowing into the check valve is provided between the storage area and the check valve. body. It is a granular material containing package of Claim 5,
The inflow inhibition mechanism is an inhibition seal part formed by joining a part of the pair of body part sheets to each other. It is a packing bag with a granular material according to claim 5,
The granular material-containing packaged body, wherein the inflow inhibition mechanism is an internal gusset sheet joined to the inner surfaces of the pair of body sheet. It is a granular material containing packaging bag of any one of Claim 1 to 7,
The said check valve is distribute | arranged in the width | variety and height of the said packaging bag, The granular material containing package body characterized by the above-mentioned. It is a granular material containing package of any one of Claim 1 to 8,
The said outlet is comprised from the pipe body connected to the inside and outside of the said packaging bag, and the cap which can be attached or detached to the said pipe body by screwing, The granular material containing package body characterized by the above-mentioned. It is a granular material containing package of any one of Claim 1 to 8,
The powder-entry package according to claim 1, wherein the outlet is an openable / closable zipper joined to the inner surfaces of the pair of trunk sheets. It is a packaging bag for a granular material that has at least a pair of body sheets facing each other and accommodates the granular material therein,
An outlet for the granular material configured to be resealable;
A check valve that inhibits inflow of gas into the packaging bag while allowing outflow of gas in the packaging bag;
With
The check valve has a degassing inlet that is a gas inlet in the packaging bag, and a degassing outlet that is the gas outlet, and the granular material in the packaging bag It is arranged at a position away from the storage area where
A packaging bag for a granular material.

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