JP5948103B2 - Bottom member for packaging bag and packaging bag using the same - Google Patents

Description

  The present invention relates to a bottom member for a packaging bag that allows a liquid to easily permeate from a mixed state of the solid and the liquid in the bag and separate the solid from the solid, and a packaging bag using the same.

When liquid is injected into a bag filled with solid or a mixture of solid and liquid is filled, it may be desirable to drain only the liquid from the bag and separate it from the solid.
For example, Patent Document 1 discloses a packaging bag that restores dried food by pouring water into a bag containing dried food and leaving it for a certain period of time to restore the dried food, and then draining excess water from the bottom of the bag. As the inner bottom member, a heat-adhesive nonwoven fabric, a heat-adhesive plastic film having pores, a resin net, or the like can be used.

JP 2004-217217 A

However, when a material having a gap on the sheet surface such as a resin net is used like the packaging bag described in Patent Document 1, the adhesive area between the film forming the bag body and the bottom member is naturally reduced, and the adhesive strength is weak. There is a problem.
There is also a problem that the bottom member side is torn when the bag body and the bottom member are joined.

  The present invention has been made in view of the above circumstances, and provides a bottom member capable of improving the bonding strength between a bag body and a bottom member and preventing the bottom member from being broken, and a packaging bag using the same. The issue is to provide.

In order to solve the above problems, the present invention provides a bottom member in which a plastic mesh is folded inward by a fold line, and is sandwiched between a pair of body films, and the periphery of the bottom member is the pair of body films. a bottom member for one or both sealed packaging bag, the one around the bottom member, at least, the edges facing each other across the fold line, have a reinforcing portion, the reinforcing portion A bottom member for a packaging bag is provided in which the mesh interval of the plastic mesh is narrower than the mesh interval of the plastic mesh in a portion other than the reinforcing portion .
The reinforcing part preferably has a resin or a small piece of film that fills the gap of the plastic mesh.

Further, according to the present invention, a bottom member in which a plastic mesh is folded inward by a folding line is sandwiched between a pair of main body films, and the periphery of the bottom member is attached to one or both of the pair of main body films. Provided is a sealed packaging bag, wherein the bottom member is a bottom member for the packaging bag, and the reinforcing portion is sealed to the main body film.
It is preferable that the pair of main body films extend on a side opposite to the fold line of the bottom member, and the pair of main body films are sealed in the extended portion.

  According to the present invention, when using a packaging bag, the bag main body and the bottom member are not separated from each other, and the bottom member is not torn, and in a self-supporting state, the liquid can be easily permeated from the bottom to separate it from the solid. It becomes possible.

It is (a) top view and (b) longitudinal section showing the 1st form example of the packaging bag of the present invention. It is (a) top view and (b) longitudinal cross-sectional view which show an example of the state which opened and expanded the packaging bag of FIG. It is a top view which shows an example of the state which looked at the packaging bag of FIG. 2 from the top. It is a top view which shows the 1st example of a bottom member for packaging bags of this invention. It is a top view which shows the 2nd example of a bottom member for packaging bags of this invention. It is a top view which shows the 3rd example of a bottom member for packaging bags of this invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 shows a packaging bag 10 according to a first embodiment of the present invention.
A packaging bag 10 shown in FIG. 1 is sandwiched between two main body films 11 and 11 having the same planar shape and a pair of main body films 11 and 11, and is folded in two with a fold line 12a as a center line. It is comprised from the bottom member 12 made into.

As shown in FIG. 1B, the bottom member 12 is folded so that the fold line 12a faces inward with respect to the space 10a in which the contents are accommodated.
Moreover, as shown to Fig.1 (a), the side edge seal parts 11a and 11b are formed in the both side edges of the packaging bag 10, respectively. At the place where the side portion of the bottom member 12 is sandwiched between the main body films 11 and 11, the bottom member 12 and the main body film 11 are sealed by the side edge seal portions 11a and 11b. Further, the side of the bottom member 12 opposite to the fold line 12a (a place where a reinforcing portion 12c described later is provided) is sealed from the main body film 11 by the joining seal portion 12b.
As shown in FIG.1 (b), the joining seal | sticker part 12b seals the outer surface with respect to the fold line 12a of the bottom member 12 only with the one main body film 11, and when the bottom part is opened, the bottom members 12 will mutually be mutually attached. The lower opening 15 can be widened apart (see FIG. 2B).

The bottom member 12 of this embodiment is made of a plastic mesh. Examples of the plastic mesh (plastic net) include a plastic wire formed in a lattice shape. For example, when it consists of thermoplastics which have heat-sealability like polyolefin resin, such as polyethylene (PE) and polypropylene (PP), since it can seal with the main body film 11 by heat seal (thermal welding), it is preferable.
A plastic mesh is preferable because it has high tensile strength and excellent deformability by using a stretched wire as compared with a nonwoven fabric or a perforated film. In order to improve drainage, it is preferable to use a wire having a low liquid absorbency.

Plastic mesh is a fabric woven so that vertical and horizontal wires intersect with each other by plain weave or twill weave, etc., or layers that are stacked without weaving vertical and horizontal wires, and the intersection (intersection) of the wires is heat sealed or knotted. It is preferable to fix. As the wire, a filament or fiber obtained by forming plastic into a linear shape by extrusion or stretching, or a multifilament or a twisted yarn manufactured by combining a plurality of these can be used.
When a monofilament woven fabric is used, the shape when the bottom is widened is preferable because of its rigidity.
The mesh shape of the plastic mesh may be a rectangle such as a square or a rectangle, or a polygon such as a rhombus, triangle, or hexagon.
The mesh size (opening) and wire diameter of the plastic mesh should be set appropriately according to the size and weight of the solid material (contents and input after opening) that needs to be separated from the liquid. Is possible. Examples of the size of the eyes include about 0.1 to 10 mm, and examples of the wire diameter include about 0.01 to 1.0 mm.

Moreover, the main body film 11 is extended beyond the joint seal part 12b, and the main body films 11 and 11 are sealed in this extended part 14 without the bottom member 12 interposing. Thereby, the space 10b between the extended portion 14 and the bottom member 12 is sealed by the seal portion 14a. In order to facilitate opening, the extending portion 14 has an opening auxiliary line made of, for example, a half cut groove (not shown) formed by a laser so as to cross the packaging bag 10 and one or both side edges. An easy-opening portion including opening start means such as notches 15a and 15b that can be formed by punching or the like can be provided on the seal portions 11a and 11b. Thereby, the extension part 14 can be easily opened without tools such as scissors.
In the case of this embodiment, opening is started from either one of the notches 15a and 15b, and the side opening is performed along the bonding seal portion 12b (while maintaining a distance from the bonding seal portion 12b), as shown in FIG. So that the bottom is opened. In the case where the opening assist line is provided, when it is composed of a half-cut groove, even if the content containing the liquid is filled and the liquid is leached into the space 10b below the bottom member 12, the liquid may leak out of the main body film 11. Absent.

  In the packaging bag 10 of this embodiment, when the extended portion 14 is opened and the lower opening 15 is opened, as shown in FIG. 2, the bottom member 12 folded inward by a fold line 12a is expanded. , Can provide independence. The bottom member 12 is at the corner between the side edge seal portions 11a and 11b and the joint seal portion 12b. An oblique seal portion (not shown) that extends obliquely from both ends of the fold line 12a toward the bonding seal portion 12b and is sealed with the main body film 11 can be provided. In this case, it is possible to prevent the contents from intervening between the main body film 11 and the bottom member 12 at the corner, and to prevent the bottom member 12 from becoming difficult to spread.

In FIG. 3, the state which looked at the packaging bag which opened the bottom part from the top is shown. As shown in FIG. 2, a pair of main body films 11 and 11 are sealed with side edge seal portions 11 a and 11 b, thereby forming a cylindrical bag main body having upper and lower openings.
As shown in FIG. 4, the bottom member 12 has a reinforcing portion 12 c at least at the edges (upper and lower sides in FIG. 4 and left and right in FIG. 3) facing each other in the periphery of the plastic mesh 12 n. As shown in FIG. 1, the reinforcing portion 12 c of the bottom member 12 is an edge portion facing each other across the fold line 12 a, that is, each edge portion of the bottom member 12 is sealed to a separate main body film 11. It is provided in the part which becomes 12b.

  In the case of the bottom member 12 shown in FIG. 4, the reinforcing portion 12c has a mesh interval of the plastic mesh that is narrower than the portion 12n other than the reinforcing portion in the reinforcing portion 12c. In the case of forming the reinforcing portion 12c by narrowing the mesh interval, for example, the eye size is about 0.05 to 5 mm and the wire diameter is about 0.01 to 1.0 mm. The mesh density (the number of lines per length) of the reinforcing portion 12c is preferably about twice the density of the non-welded portion 12n, for example, about 1.5 to 5 times. The width of the reinforcing portion 12c (the vertical width in FIG. 4) is preferably about 2 to 10 cm for each edge portion.

  In the case of the bottom member 12A shown in FIG. 5, the reinforcing portion 21 is formed by extruding a resin on the plastic mesh 12n and covering the edge portion. When the reinforcing part 21 is formed by extruding a resin, a heat-bondable resin such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), or the like is required for the reinforcing part 21 (2- About 10 cm) is extruded and laminated to fill the voids in the plastic mesh 12 n to form the reinforcing portion 21. The thickness of the extrusion laminate in the reinforcing portion 21 is preferably about 1 to 3 times the thickness of the plastic mesh 12n.

  In the case of the bottom member 12B shown in FIG. 6, the reinforcing portion 22 is formed by adhering a film on the plastic mesh 12n and covering the edge portion. In the case of adhering the film, the reinforcing portion 22 is obtained by adhering a small piece of film, which is a separate member from the main body film 11, to the mesh with an adhesive, or welding a small piece of sealant film to the mesh. Form. The film constituting the reinforcing portion 22 may be adhered to only one side of the plastic mesh 12n, but the film of the plastic mesh 12n is folded in half from a width twice the width of the reinforcing portion 22 (about 2 to 10 cm). It is preferable to join to both sides.

  As a film for forming the reinforcing portion 22 by adhering the film to the mesh 12n with an adhesive, a heat-bondable resin such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), etc. Any film can be used, but the same type of resin as that of the inner surface of the main body film 11 is preferably used because the same type of resin is bonded to each other with an adhesive. . If an adhesive capable of bonding different kinds of resins is used, the reinforcing portion 22 may be formed of a resin film different from the inner surface of the main body film 11. When the sealant film or the film having a resin layer (sealant layer) that can be thermally bonded to both sides is used for the reinforcing portion 22, the inner surface of the main body film 11 and the sealant can be thermally welded without using an adhesive. .

By providing the reinforcing portions 12c, 21, 22 on the bottom members 12, 12A, 12B, the adhesion area between the bottom member 12 and the main body film 11 can be increased. Moreover, the rigidity of the reinforcement parts 12c, 21, and 22 can be made higher than the plastic mesh 12n of parts other than the reinforcement part. Therefore, the main body film 11 and the bottom members 12, 12A, 12B can be peeled off and the plastic mesh 12n can be prevented from being broken.
In addition, while narrowing the mesh space | interval of the edge part of the bottom member 12 as shown in FIG. 4, the extrusion part of resin and adhesion | attachment of a film are used together in that edge part as shown in FIG. 5 or FIG. It can also be formed.

The bottom members 12, 12A, 12B of the present embodiment are formed of a plastic mesh 12n and reinforcing portions 12c, 21, 22, and one of the pair of main body films 11, 11 around the entire circumference of the bottom members 12, 12A, 12B. Since both are sealed, when the bottom of the packaging bag 10 is expanded, the liquid can be transmitted through the plastic mesh 12n. Further, the liquid does not leak through the place where the bottom members 12, 12 </ b> A, 12 </ b> B are sealed with the main body film 11 and the main body film 11 thereabove.
And since the reinforcement parts 12c, 21, and 22 are provided in the location where the bottom member 12, 12A, 12B was sealed with the main body film 11, a bag main body and a bottom member peel or a bottom member is torn. In a self-supporting state, the liquid can be easily permeated from the bottom and separated from the solid.

  As a film used for constituting the bag body such as the main body film 11, a conventionally used film such as a film made of biaxially stretched polypropylene, biaxially stretched polyamide, biaxially stretched polyester or the like is used as the base film. A laminate obtained by laminating a polyolefin resin such as low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, and polypropylene as a sealant layer is used on these base films. Examples of the method for producing the laminated film include a dry laminating method, an extrusion laminating method, and a coextrusion method. An adhesive or an anchoring agent can be provided between the base film layer and the sealant layer in order to improve the adhesive strength. In this case, a plurality of substrate films may be laminated to increase the strength of the bag. Alternatively, a metal foil such as an aluminum foil, a metal vapor-deposited layer, an inorganic vapor-deposited layer such as ceramic, an ethylene-vinyl alcohol copolymer film, or the like may be laminated in order to improve the barrier property against gas or ultraviolet rays.

The size of the bag is not particularly limited. For example, the height of the bag is about 100 to 500 mm, and the width of the bag (maximum width between both side edges) is about 70 to 300 mm. The amount is about 100 to 5000 cm ³ .

  In the upper part of the packaging bag 10, the space between the side edge seal portions 11 a and 11 b is opened as a filling port, and the contents (liquid, solid, or mixture) are filled into the packaging bag 10 through the upper opening portion 13. Is possible. After filling the contents, the main body films 11, 11 are heat sealed at the periphery of the upper opening 13 to form an upper seal portion (not shown), and the upper opening 13 is closed. In addition, the packaging bag with the top sealed has an easy opening part (not shown) consisting of an opening auxiliary line such as a half-cut groove or an opening starting means such as a notch, or a chuck, etc. It is preferable to provide an opening / closing means (not shown).

  There are no particular limitations on the types and uses of the contents to which the packaging bag 10 of the present embodiment can be applied, but (1) a solid and liquid filled in a mixed state, and (2) a solid There are various modes such as a case where a liquid is added at the time of use and (3) a case where the liquid is filled and a solid is added at the time of use.

(1) The content in which the solid and the liquid are filled in a mixed state is not particularly limited, and examples thereof include foods, industrial products, medical supplies, and cosmetics. Examples of food include boiled water (maiko, bamboo shoots, konjac, wild vegetables, menma (sina bamboo), etc.), pickles (ginger, Chinese cabbage, eggplant, cucumbers, etc.), and processed products (boiled eggs, etc.). It is done. In the case of these contents, after the unnecessary liquid is discharged from the plastic mesh of the bottom member, the separated solid can be taken out from the upper opening 13.

(2) Contents to be filled with solid and liquid to be added at the time of use are not particularly limited. For example, solid detergent for dishwashers, dried foods (salted wakame, vermicelli, kanpyo, bonito, tea leaves) Etc.), vegetables / fruits (sprouts, cut vegetables, cherries, mushrooms, etc.), noodles (dry noodles such as pasta, buckwheat noodles, raw noodles, Chinese noodles, instant noodles, frozen noodles, etc.), meat, seafood, laundry detergent And soap. In the case of these contents, unnecessary liquid is discharged after supplying liquid such as hot water from the outside to the inside of the bag through the plastic mesh, or unnecessary from the plastic mesh after supplying the liquid from the upper opening of the bag Can be discharged. Thereby, draining can be performed without preparing a colander or a ball.

When foods that require cooking such as noodles and vegetables are used as the contents, the bag can be boiled in the pan with the bottom of the packaging bag of this embodiment opened. In this case, after cooking, hot water can be drained from the plastic mesh of the bottom member by removing the bag from the pan as it is. In the case of dry foods or instant noodles, hot water can be poured into the container for cooking (hot water reconstitution). It can also be used for draining when the noodles are boiled using a pan or microwave oven and then cooled by passing through cold water or running tap water.
Further, when the contents such as a desiccant, a humectant, and a hygroscopic agent are used as contents, a plastic mesh of the bottom member can be used to discharge the water accumulated during use of the packaging bag of this embodiment.

(3) Contents to be filled with liquid and solids added at the time of use are not particularly limited. For example, seasoning liquid (pickled soup for pickles such as shallow pickles and kimchi), cleaning liquid, dye liquid And various treatment liquids. In the case of these contents, an unnecessary liquid can be discharged | emitted from the plastic mesh of a bottom member, after throwing a solid substance from an upper opening part.

As mentioned above, although this invention has been demonstrated based on suitable embodiment, this invention is not limited to the above-mentioned example, Various modifications are possible in the range which does not deviate from the summary of this invention.
The form of the packaging bag in the present invention is not particularly limited, and can be applied to various packaging bags such as a flat bag such as a three-side seal and a four-side seal, a self-standing bag such as a standing pouch and a square bottom bag, and a gusset bag. It is.
The contents after filling the packaging bag can be sterilized with a boil or a retort.
The reinforcing part can also be provided on the entire circumference of the bottom member.

DESCRIPTION OF SYMBOLS 10 ... Packaging bag, 11 ... Main body film, 11a, 11b ... Side edge seal part, 12, 12A, 12B ... Bottom member, 12a ... Fold line, 12b ... Joining seal part, 12c, 21, 22 ... Reinforcement part, 12n ... Plastic mesh, 13 ... upper opening, 14 ... extension, 14a ... sealing seal part, 15 ... lower opening, 15a, 15b ... notch.

Claims (4)

For a packaging bag in which a bottom member in which a plastic mesh is folded inward by a fold line is sandwiched between a pair of body films, and the periphery of the bottom member is sealed by one or both of the pair of body films A bottom member of
Wherein among the peripheral of the bottom member, at least, the edges facing each other across the fold line, have a reinforcing portion, the mesh spacing of the plastic mesh in the reinforcement portion, the at portions other than the reinforcing portion plastic A bottom member for a packaging bag, wherein the bottom member is narrower than the mesh interval of the mesh . Wherein the reinforcing portion, the bottom member of the packaging bag according to claim 1, characterized in that it comprises a resin or a small piece of the film to fill the void of the plastic mesh. A bottom member in which a plastic mesh is folded inward by a fold line is sandwiched between a pair of body films, and the periphery of the bottom member is a packaging bag sealed with one or both of the pair of body films There,
Packaging bag wherein the bottom member is made of a bottom member of the packaging bag according to claim 1 or 2, wherein the reinforcing portion is characterized in that it is sealed to the body film. Said pair of body film, said bottom member being the folding line and extending on the opposite side of the pair of main body between films in the extended portion of claim 3, characterized in that it is sealed Packaging bag.

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