JP7119530B2 - Packaging bag with resealing function - Google Patents

Description

TECHNICAL FIELD The present invention relates to a resealable packaging bag, and more particularly to a resealable packaging bag in which resealing means can be easily formed and an opened opening can be reliably resealed by a simple operation.

2. Description of the Related Art Conventionally, there has been known a packaging bag in which sheets mainly composed of plastic sheets are bonded together and a storage portion is provided inside. In order to take out the contents from such a packaging bag, a nozzle-shaped spout is formed in the upper part of the packaging bag by a sheet seal pattern, and the tip of the spout is cut open. , to allow the contents to be poured out.

In such a conventional packaging bag, once the spout portion is cut open, it is difficult to reseal the spout portion. In order to do so, there was a problem that it was necessary to transfer to another container, which was troublesome. Various packaging bags have been proposed to solve such problems of conventional packaging bags.

For example, Patent Document 1 discloses a pouch in which a spout made of a polyethylene resin molding and a cap made of a spout and a cap are attached to the upper side of a self-supporting pouch by heat sealing together with a laminated film that constitutes a packaging bag. It can be seen that the openable and closable spout serves as a packaging bag that can be freely resealed.

In addition, Patent Document 2 discloses a bag having an opening at the tip of an outflow channel that protrudes from the bag in the form of a nozzle. When resealing, the bag is sealed by bending the nozzle-shaped outflow path and inserting the tip of the nozzle into a slit provided in the bag and fixing.

However, the pouches disclosed in Patent Document 1 require separate resin-molded members such as spouts and caps, and also require a separate process for attaching them to the main body of the packaging bag, which tends to increase costs. Also, since the portion to which the spout is attached is thicker than the bag itself, there is a problem that it is difficult to stack the bags when stored in an unused state and takes up a lot of space. In the bag disclosed in Patent Document 2, the outflow path is only folded and not sealed, and the contents adhering to the vicinity of the opening adhere to other parts of the bag when the bag is folded and fixed. In addition, it is necessary to provide a large extra area in the laminated sheet for providing the slit, which is inefficient.

JP-A-2005-1759 JP-A-5-178356

Therefore, the present invention is a packaging bag formed by bonding sheets such as laminated sheets, since it is not necessary to add a large extra sheet or a separate member for resealing, it is low cost, and the packaging bag after opening can be used. To provide a packaging bag with a resealing function that can be easily and reliably resealed.

In order to solve the above problems, the invention according to claim 1 of the present invention is
A packaging bag in which two sheets or a folded sheet are opposed to each other and sealed at the edges of the top, bottom and left and right sides to form a storage part inside,
At the top of the packaging bag,
The pouring part is formed in a cylindrical shape by pouring part sealing parts that seal the pouring part side ends on both sides thereof,
An opening piece that seals the tip of the pouring part is connected to the tip of the pouring part, and is separated by a curved weakening line,
having a spout that is opened by cutting off the opening piece along the weakening line;
A space for accommodating the tip of the pouring part is formed inside the opening piece ,
A projection is formed on the outer side of at least one side of the tip of the pouring part, and the space for accommodating the tip of the pouring part inside the opening piece has a region for accommodating the protrusion. A packaging bag with a resealing function characterized by:

Further, the invention according to claim 2 of the present invention is
2. The recycling bag according to claim 1, wherein the upper end edge of the packaging bag has a concave portion recessed toward the bottom side, and the spout portion and the opening piece are provided within the area of the concave portion. It is a packaging bag with a sealing function.

Further, the invention according to claim 3 of the present invention is
3. The packaging bag with resealing function according to claim 1, wherein the shape of the protrusion is any one of rectangle, rounded rectangle, triangle, semicircle, semiellipse, or a combination thereof. be.

Further, the invention according to claim 4 of the present invention is
4. The resealable packaging bag according to any one of claims 1 to 3 , wherein the weakening line is a half-cut line.

Further, the invention according to claim 5 of the present invention is
5. The resealable packaging bag according to any one of claims 1 to 4 , wherein an opening for filling contents is provided in an upper part other than the part where the pouring part is provided.

Further, the invention according to claim 6 of the present invention is
6. The packaging bag with a resealing function according to any one of claims 1 to 5 , wherein the packaging bag is a standing pouch in which a bottom tape is sandwiched in the bottom portion to seal the edges.

Further, the invention according to claim 7 of the present invention is
7. A packaging body, characterized in that contents are accommodated in the accommodating portion of the packaging bag with a resealing function according to any one of claims 1 to 6 .

According to the invention of claim 1 of the present invention, when opening the packaging bag formed by pasting the sheets together, the portion of the weakened line is torn by hand at the leading end of the spouting portion to cut off the opening piece. , the spout can be opened to pour out the contents. can be sealed, the packaging bag can be easily and reliably resealed. The opening piece is formed of the same sheet as the packaging bag, and can be provided at the same time by die cutting or the like when manufacturing the packaging bag. Moreover, it is possible to provide a packaging bag that can be provided with a resealing function at low cost.

Further, according to the second aspect of the invention, since the spouting part and the opening piece are provided in the area of the recess in which the edge part of the upper part of the packaging bag is recessed toward the bottom part, the size of the sheet can be adjusted. An efficient and low-cost packaging bag with less sheet waste is obtained without the need to increase the size to provide the protrusion and the opening piece.

Further, according to the third aspect of the invention, the protrusion formed at the tip portion of the pouring portion on the side of the pouring portion forms a space for accommodating the tip portion of the pouring portion formed inside the opening piece. Since the opening piece is stored in the region for storing the protrusion, it is difficult for the opening piece to fall off, so the spout can be reliably resealed.

Further, according to the fourth aspect of the invention, the projection has a simple shape that is easy to process, and can be suitably accommodated in the space for accommodating the tip of the spout portion inside the opening piece.

Further, according to the fifth aspect of the invention, the weakening line can be easily provided by known laser processing, scratch processing, or the like.

Further, according to the sixth aspect of the invention, the contents can be filled from the opening for filling the contents, and the opening can be sealed after filling, and it is necessary to separately attach a filling member or the like. There is no

Further, according to the seventh aspect of the invention, the packaging bag can be made self-supporting, easy to store, and can stand with its bottom down even after opening, and the contents can be poured out from the opened spout. Things never fall out.

According to the eighth aspect of the invention, after part of the content stored in the storage part is poured out, the tip of the pouring part is covered with the cut opening piece, and the space inside the pouring part is filled with the opening piece. By housing the tip, a package can be obtained in which the spout can be reliably resealed.

1 is a schematic diagram of a packaging bag with a resealing function of the present invention; FIG. FIG. 4 is an enlarged schematic diagram of a portion of a pouring section showing a mode of unsealing and resealing the packaging bag; FIG. 4 is a schematic diagram showing an example of the form of the pouring part and the opening piece. FIG. 3 is a schematic diagram showing an example of the form of weakening lines of the packaging bag with resealing function of the present invention. FIG. 10 is a schematic diagram showing another form example of the spouting part and the opening piece; FIG. 4 is a schematic diagram showing a form example in which a spouting portion and an opening piece are provided obliquely upward; FIG. 10 is a schematic diagram of an embodiment in which a filling port is provided in the upper portion;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the following description, the same reference numerals may be given to the same members, etc., and the description thereof may be omitted.

FIG. 1 is a schematic diagram of the resealable packaging bag of the present invention. The packaging bag 1 is made into a standing pouch shape from a sheet mainly made of plastic. The packaging bag 1 comprises two laminated sheets 2 and 3 having at least a base material layer and a sealant layer as front and back sheets, with the sealant layers facing each other, and a bottom tape 4 folded in two in an inverted V shape is sandwiched at the bottom. A bottom portion 11 is formed by sealing with a sealing portion of an edge, an upper portion 12 and left and right side portions 13 are sealed, and a storage portion 14 is formed inside. The sealing of each seal portion can be suitably performed by heat sealing.

A recessed portion 5 recessed toward the bottom portion 11 is provided in a part of the upper portion 12, and in the recessed portion 5, a cylindrical spouting portion 6 is formed by spouting portion seal portions 15 sealing the spouting portion side ends on both sides of the recessed portion 5. protrudes upwards. An opening piece 7 is separated by a half-cut line 16 which is a weakening line and connected to the tip of the pouring part 6 to seal the tip of the pouring part 6 . Note that the number of half-cut lines 16 may be one, or a plurality of lines may be provided. By tearing the half-cut line 16 and separating the opening piece 7, the tip of the spouting part 6 is opened and becomes a spout. Although the method of providing the half-cut line 16 is not particularly limited, it can be provided, for example, by known scratch processing or laser processing.

Protrusions 17 are provided at the tip of the spout portion seal portion 15, here on both sides. On the other hand, a space 8 that is a non-sealed portion is formed inside the opening piece 7 . FIG. 2 is an enlarged view of the spout portion of the packaging bag, illustrating a mode of opening and resealing. As shown in FIG. 2, the contents can be poured out by tearing the half-cut line 16 to separate the opening piece 7 and forming the spout 18, and when the packaging bag 1 is resealed after that, the formed By covering the spout 18 with the cut opening piece 7 and inserting the tip of the spout part 6 into the internal space 8 and storing it, the spout can be sealed and the packaging bag 1 can be resealed. .

In addition, the space 8 inside the opening piece 7 can be provided with a region 9 for accommodating the projection 17. By housing the projection 17 in the region 9, the opening piece 7 is less likely to fall off, and the pouring port can be more reliably poured out. can be sealed and the packaging bag 1 can be resealed. Also, even if the contents adhere to the periphery of the spout 18 when pouring out the contents, since the spout 18 and its surroundings are accommodated in the space 8 inside the opening piece 7, other parts of the packaging bag 1 can be removed. It is hygienic because the contents do not adhere to the part.

When opening the resealed packaging bag 1 again, the opening piece 7 can be removed by pulling up the opening piece 7 by hand. The opening piece 7 accommodates the tip portion of the spout portion 6. In particular, the protrusion 17 is accommodated in the area 9 and is loosely fitted. Since it is a laminated sheet with high flexibility, it can be removed without a large load by pulling it up by hand.

At this time, by forming the pouring portion 6 and the opening piece 7 within the region of the recess 5, that is, inside the region surrounded by the axis X and the axis Y in FIG. The opening piece 7 does not protrude from the substantially rectangular area surrounded by the upper part 12, the bottom part 11, the side part 13, the axis X and the axis Y, and the laminated sheets 2 and 3 are efficiently imposed when the packaging bag 1 is manufactured. It is preferable because it can be used and the cost does not increase. In addition, when the container is stored when not in use, or when the container is filled with contents and displayed at a store, there is no unnecessary protrusion from the substantially rectangular shape, and the container is easy to handle.

The shape of the protrusion 17 is not particularly limited, but if it has a complicated shape, it may be difficult to form it, and there is a risk that it may be torn off after formation, so it is preferable to have a simple shape. The shape of the protrusion 17 may be, for example, a cross shape as a whole by protruding in a rectangular shape on both sides as illustrated in FIG. 1, or triangular shapes (a), (b), It can be a semi-elliptical shape (c) or the like. Moreover, the shapes of both sides may be different, for example, one may be rectangular and the other may be oval. Further, it is preferable that the shape of the area 9 for accommodating the projections 17 provided in the space 8 is provided in a shape corresponding to the shape of the projections 17, because the storage is facilitated.

The half-cut line 16, which is a weakening line, may be provided in a straight line as shown in FIG. 1, or may be curved as shown in FIG. By forming a curved shape, it is possible to change the position of the section of the pouring part 6 and the opening piece 7, widen the opening leading to the space 8 of the opening piece 7, and when storing the tip of the pouring part 6, Insertion of the tip of the pouring part 6 becomes easier.

FIG. 5 is a schematic diagram showing another form example of the pouring part and the opening piece. The form of the protrusion 17 and the area 9 for accommodating it may be, other than those described above, such that the protrusion 17 is provided only on one of the pouring section seal portions 15 and is accommodated in the area 9, as shown in FIG. Also good. In this case, even if the area 9 for accommodating the protrusion 17 provided in the space 8 of the opening piece 7 is provided only on one side as shown in FIG. 5(a), it is provided on both sides as shown in FIG. You can do it. If the regions 9 are provided on both sides, there is no need to check the direction in which the tip of the pouring part is to be inserted when resealing the opening piece 7 after cutting it off, which is highly convenient.

The pouring part 6 can also be provided so as to protrude obliquely upward in the recess 5 as shown in FIG. An opening piece 7 is provided at the tip of the pouring part 6 in the same manner as in the above-described embodiment. Also in this embodiment, the pouring portion 6 and the opening piece 7 are provided so as to be accommodated within the area of the recessed portion 5 defined by the X'-axis and the Y'-axis.

The portion other than the recessed portion 5 on the upper side of the packaging bag 1 can be used as a filling port 19 for the content by not sealing at the time of bag making as in the example shown in FIG. The filling port 19 is sealed in the same manner as the other edges after filling with the contents, and the packaging bag 1 is sealed to form a package.

In addition, the packaging bag with a resealing function of the present invention is not limited to the standing pouch shape as in the above embodiment, and packaging in any known shape such as a gusset pouch, a three-side seal bag, a four-side seal bag, a pillow seal bag, etc. It can also be used as a bag.

As the sheet used for the resealable packaging bag of the present invention, a laminated sheet that is commonly used for flexible packaging bags can be used. As the base material, paper, metal foil, or synthetic resin film consisting of one or several layers is used. For example, low-density polyethylene resin (LDPE), high-density polyethylene resin (HDPE), linear low-density polyethylene resin (LLDPE), polypropylene resin (PP), polyolefin resin such as polyolefin elastomer, polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyester resins such as polyethylene naphthalate resin (PEN), cellophane, cellulose resins such as cellulose triacetate (TAC), polymethyl methacrylate (PMMA) resin, ethylene- Vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, polyamide resin, polystyrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC) , polycarbonate resin (PC), fluorine-based resin, urethane-based resin and other synthetic resin films, paper, metal foil and the like are used singly or in combination.

As the sealant layer, polyolefin-based resins are generally used, and specifically, low-density polyethylene resin, medium-density polyethylene resin, linear low-density polyethylene resin, ethylene/vinyl acetate copolymer, ethylene/α-olefin resin. Ethylene-based resins such as copolymers, polypropylene-based resins such as homopolypropylene resins, propylene/ethylene random copolymers, propylene/ethylene block copolymers, and propylene/α-olefin copolymers are used.

The sheet used for the packaging bag with a resealing function of the present invention has a content to be filled in the packaging bag, usage conditions such as the presence or absence of heating after filling the content, water vapor and other gas barrier properties, and light blocking properties. Depending on the required performance such as various mechanical strength such as puncture resistance, a gas barrier layer, a light shielding layer, a strength improving layer, a printing layer, etc. are laminated between the base material layer and the sealant layer. Laminated sheets of construction can be used. The substrate layer, gas barrier layer, light shielding layer, strength improving layer, printing layer, sealant layer, and the like may be formed as individual layers, but may be formed by laminating a plurality of layers.

As described above, according to the packaging bag with a resealing function of the present invention, it can be easily opened by cutting off the opening piece along the weakening line when tearing off the tip of the pouring part to open it. can be easily and reliably resealed by storing the tip of the pouring part in the space inside the opening piece, and there is no need to add a separate member or extra sheet for resealing, which reduces the cost. It is possible to provide a packaging bag with a resealing function.

Reference Signs List 1 Packaging bags 2, 3 Laminated sheet 4 Bottom tape 5 Recessed portion 6 Pour-out portion 7 Opening piece 11 Bottom portion 12 Top portion 13 Side portion 14 Accommodating portion 15 Spouting portion sealing portion 16 Half-cut line 17 Projection 18 Spouting port 19 Filling port

Claims (7)

A packaging bag in which two sheets or a folded sheet are opposed to each other and sealed at the edges of the top, bottom and left and right sides to form a storage part inside,
At the top of the packaging bag,
The pouring part is formed in a cylindrical shape by pouring part sealing parts that seal the pouring part side ends on both sides thereof,
An opening piece that seals the tip of the pouring part is connected to the tip of the pouring part, and is separated by a curved weakening line,
having a spout that is opened by cutting off the opening piece along the weakening line;
A space for accommodating the tip of the pouring part is formed inside the opening piece ,
A projection is formed on the outer side of at least one side of the tip of the pouring part, and the space for accommodating the tip of the pouring part inside the opening piece has a region for accommodating the protrusion. A packaging bag with a resealing function characterized by: 2. The recycling bag according to claim 1, wherein the upper end edge of the packaging bag has a concave portion recessed toward the bottom side, and the pouring portion and the opening piece are provided within the region of the concave portion. A packaging bag with a sealing function. 3. The packaging bag with a resealing function according to claim 1, wherein the shape of said protrusion is any one of a rectangle, a rounded rectangle, a triangle, a semi-circle, a semi-ellipse, or a combination thereof. 4. The packaging bag with a resealing function according to any one of claims 1 to 3 , wherein said weakening line consists of a half-cut line. 5. The resealable packaging bag according to any one of claims 1 to 4 , further comprising an opening for content filling in an upper part other than the part where the pouring part is provided. 6. The packaging bag with a resealing function according to any one of claims 1 to 5 , wherein the packaging bag is a standing pouch in which a bottom tape is sandwiched in the bottom portion to seal the edges. 7. A package comprising a resealable packaging bag according to any one of claims 1 to 6 , wherein contents are stored in said storage portion.

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