JP2020075751A - Pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pouch having the same function as a spout that can be opened and closed at low cost.
SOLUTION: The laminated films are superposed, and the surrounding upper side part (11), left side part (12), right side part (13), and bottom side part (14) are sealed or folded and closed to form a storage part inside. In the formed pouch (1), the left and right side seals extend inward at one side or the intersecting inclined part of two adjacent sides, and a narrow opening (16) made of an unfused part is formed inside thereof. A pouch which is formed and whose opening can be opened and closed by a resin chuck (2).
[Selection diagram] Figure 1

Description

  The present invention, liquid medicines, liquid detergents, toiletries such as softeners, or liquids such as liquid foods such as concentrated coffee or powder detergents, sugar, pepper, powder such as salt is stored. The present invention relates to a pouch having an opening portion that can be opened and closed.

Liquid medicines such as pesticides, liquid fertilizers, liquid detergents, softeners, bleach, and other toiletry products, and liquid foods such as concentrated coffee have traditionally been used in glass bottles, blow bottles, and metal can containers. It was put in a hard container and distributed.
However, such a hard container requires a large amount of resin and materials to be used, has a heavy load on disposal, and has been urgently required to take measures against the environment. As a countermeasure, a container mainly made of thin film can be considered, and in order to improve usability, a spout is provided so that it can be easily taken out in small portions in several times. The same convenience has been demanded as with bottles.

As a pouch having a mouth plug, for example, in Patent Document 1,
A spout attached to a pouch containing a fluid content,
A tubular portion having a hollow cylindrical shape,
A first flange portion provided on the outer peripheral surface of the tubular portion,
A second flange portion located closer to the cap attached to the spout than the first flange portion,
In the first flange portion and the second flange portion, a recessed portion that is recessed toward the tubular portion is formed,
The pouch includes a first surface and a second surface facing the first surface,
The first flange portion and the second flange portion include a first edge portion extending on the first surface side of the pouch and a second edge portion extending on the second surface side of the pouch,
The recess proposes a spout that is formed on both the first edge and the second edge.

As shown in FIG. 6, such a spout 5 is a molded product that is molded by injection molding separately from the manufacturing of the body of the pouch 1, and is manufactured by fusing the spout 5 to one side of the pouch 1. It
Further, the spout 5 needs to be separately injection-molded with a cap 6 that can open and close the spout 51.
Therefore, there is a problem that the spout 5 and the cap 6 increase the price of the pouch 1 and become expensive.
Further, seasonings and fruit sauces having low fluidity are difficult to remove from the container in the case of cans and bottles, and there is a problem that they are left in the container.
In addition, a container that has fluidity and that opens and closes frequently requires the expensive spout and cap as described above, but the jelly that can be used only 2-3 times or several times There was a need for cheaper closures for containers that contain contents such as beverages.

JP, 2018-87046, A

  Therefore, it is an object of the present invention to obtain a pouch having the same function as that of a spout that can be opened and closed at low cost.

The pouch of the present invention is
A pouch in which laminated films are superposed, and a surrounding upper side portion, a left side portion, a right side portion, and a bottom side portion are sealed or folded and closed to form a storage portion inside,
The left and right side seals extend inwardly on the one side or on the intersecting inclined part of two adjacent sides, and a narrow opening formed of an unfused part is formed inside thereof.
A pouch in which a narrow opening can be opened and closed by a resin chuck.

The pouch of the present invention does not use expensive plugs and caps that are molded by injection molding.
The opening can be opened and closed simply by fusing an inexpensive extrusion-molded resin chuck, and fusing the resin chuck can be done using a general-purpose production line, and can be manufactured at high speed and at low cost. is there.

It is a front view which shows the example of 1st embodiment of the pouch which concerns on this invention. It is a figure which shows the process of tearing and opening the narrowing opening of the example of 1st embodiment of the pouch which concerns on this invention. It is sectional drawing of the resin chuck vicinity which shows the process of opening the opening part of the pouch which concerns on this invention. It is a front view which shows the example of 2nd embodiment of the pouch which concerns on this invention. It is a front view which shows the example of 3rd embodiment of the pouch which concerns on this invention. It is a perspective view which shows the external appearance of the conventional pouch with a spout.

Hereinafter, an embodiment of a pouch of the present invention will be described with reference to the drawings.
FIG. 1-1 is a front view showing a first embodiment of the pouch 1 according to the present invention.
The pouch 1 faces the sealant surfaces of the front film 101 and the rear film 102 made of a laminated film, and seals or folds and closes the surrounding upper side part 11, left side part 12, right side part 13, and bottom part 14, A storage portion 15 is formed inside.
In the first embodiment, the bottom portion 14 has a gusset structure in which the sealant surface of the bottom intermediate film 4 is bent outward and sandwiched between the front film 101 and the rear film 102 for sealing, so that the bottom greatly expands and the capacity is increased. To make it bigger. Of course, a pouch with a general four-way seal may be used without forming the bottom part with a gusset.
There are two major differences from ordinary pouches.
One of them is that the upper side portion 11 seals both sides, and an unfused portion between them forms a narrowed opening 16 composed of a partially narrowed portion.
Another point is that the resin chuck 2 is fused between the front film 101 and the rear film 102 of the narrow opening 16.
Then, on the surfaces of the front film 101 and the rear film 102 within the unfused area formed between the outside of the resin chuck 2 and the fusion-bonding closing portion 110 of the upper side portion 11, an easy-open line that can be opened. An unsealing section 30 composed of 3 is provided.
At both ends of the easy-open line 3, opening start portions 31 and 32, which are notches or cuts, are provided and can be torn and opened.

FIG. 2 is a diagram showing a process of tearing and opening the narrowed opening 16 of the first embodiment of the pouch 1 according to the present invention.
The front film 101 and the rear film 102 are torn along the easy-opening line 3 by grasping one end of the upper side 11 of one of the opening start portions 31 and 32 provided at both ends of the easy-opening line 3 and made of notches or cuts. ..
When the easy-open line 3 is torn, the resin chuck 2 is inside and can be opened and closed.

  The resin chuck 2 can be closed by biting the male-side chuck 21 and the female-side chuck 22 as shown in the AA cross section of FIG. 1 as shown in FIG. 3, and releasing the biting to separate them. However, it can be opened, and can be manufactured at low cost by profile extrusion molding.

  FIG. 3A is a cross-sectional view of the narrow opening 16 in the unopened state, and there is a fusion-bonding closing portion 110 in which the front film 101 and the rear film 102 are fusion-bonded to each other on the outside of the resin chuck 2. It is completely sealed.

FIG. 3-2 is a view showing that the outer end portion of the resin chuck 2 and the inner end portion of the fusion-sealing portion 110 where the front film 101 and the rear film 102 are fusion-bonded to each other are easily provided in the unfused portion range. In the opening line 3, the front film 101 and the rear film 102 are torn and opened.
Even if the front film 101 and the rear film 102 are torn, as shown in the cross-sectional view of the resin chuck shown in FIG. 3-4, since the resin chuck 2 of the narrow opening 16 is engaged, it is not opened. , Closed and sealed.
It is desirable that the front film 101 and the rear film 102 of the torn fusion closure part 110 are torn to the ends along the easy-open line 3 and completely removed.

FIG. 3-3 is a cross-sectional view showing a state in which the male side chuck 21 and the female side chuck 22 of the resin chuck 2 are separated from each other and the narrowing opening 16 of the pouch is opened.
Since the resin chuck 2 is made of a resin that is easily fused with the sealant layer and is made of a highly flexible resin, the resin chuck 2 can be easily deformed, and can be closed by occlusion and repeatedly opened by releasing it.

FIG. 4 is a front view showing a second embodiment of the pouch 1 according to the present invention.
In the pouch 1 of the second embodiment, the sealant surfaces of the front film 101 and the rear film 102 made of a laminated film are opposed to each other, and the peripheral upper side portion 11, left side portion 12, right side portion 13, and bottom portion 14 are sealed. It is the same as in the first embodiment in that it is closed and the storage portion 15 is formed inside.
Also in the second embodiment, the bottom portion 14 has a gusset structure in which the sealant surface of the bottom intermediate film 4 is bent outward, and is sandwiched between the front film 101 and the rear film 102 to seal the bottom portion, and the bottom is widened and the capacity is increased. To make it bigger. Of course, a pouch with a general four-way seal may be used without forming the bottom part with a gusset.
The only difference from the pouch of the first embodiment is one point.
That is, an inclined seal portion is provided at a portion where the upper side portion 11 and the left side portion 12 intersect with each other, and a narrow opening portion is formed thereat according to an inclined angle.
An unfused portion is provided at the center of the inclined seal portion, and a narrow opening 16 is formed by sealing both sides thereof.
A resin chuck 2 is fused between the front film 101 and the rear film 102 of the narrowed opening 16, and the resin chuck 2 is also fused according to the inclination.
Then, on the surfaces of the front film 101 and the rear film 102 within the unfused area formed between the outside of the resin chuck 2 and the fusion-bonding closing portion 110 of the upper side portion 11, an easy-open line that can be opened. The unsealing part 30 made of 3 is provided at the same inclined position.
Similarly, the opening start portions 31 and 32, which are notches and cuts, are provided at both ends of the easy-open line 3 so that the easy-open line 3 can be torn and opened.

FIG. 5 is a front view showing a third embodiment of the pouch 1 according to the present invention.
The pouch 1 of the third embodiment is an example of a form in which the vicinity of the spout is thinned to make it easier to pour in the outer shape drawing of the first embodiment.
By thinning the vicinity of the spout in this way, when it is used for a refill container, it becomes easier to thrust into the spout at the refill destination. Even when it is used for other uses, there is a merit that contents are unlikely to drip around and become dirty.

  The basic configuration of the laminated film constituting the pouch of the present invention may be a film comprising a base material layer on the outside and a sealant layer on the inside, but as a middle layer, a barrier layer for improving the storage stability of the contents or It is preferable to provide a layer that imparts flexibility such that the bag is not easily broken when dropped.

  As the base layer of the front film and the rear film, the intermediate film, a biaxially oriented polyethylene terephthalate film, a biaxially oriented polypropylene film, a biaxially oriented polyamide film, a polystyrene film, a polycarbonate film, a polyacrylonitrile film, a polyimide film, etc. Can be mentioned. There is no particular limitation as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. In addition, these films may be provided with an aluminum vapor deposition layer.

  Further, a printing layer can be appropriately provided on the base material layer of the film, if necessary. The printed layer is a layer printed with an ink obtained by adding various pigments, extender pigments and plasticizers, desiccants, stabilizers, etc. to a binder resin such as urethane type, acrylic type, nitrocellulose type and rubber type. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexo printing, silk screen printing, and inkjet printing can be used. Further, the surface of the base material layer may be previously subjected to corona treatment or ozone treatment as a pretreatment to improve the adhesion of the printed layer.

  As the sealant layer of the film, a polyolefin resin is generally used, and specifically, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer ( Polyolefin resins such as EVA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ionomer and polypropylene can be used. These resins can be formed into a film by a T-die or an extruder such as inflation. It may be a single layer or multiple layers. The thickness of the film is preferably in the range of 50 to 200 μm.

  An adhesive for dry lamination can be used as the adhesive layer of the film. For example, a two-component curing type urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, etc. can be used. .. The laminating method may be a dry laminating method, but the laminating machine may be used for laminating while forming the sealant layer side, or sand polyethylene processing may be performed.

  Further, in the film, if it is necessary to improve the physical properties of the laminated sheet, for example, when improving the rigidity and drop strength of the laminated sheet, puncture strength, etc., when improving the barrier properties against water vapor or oxygen gas, It is also possible to provide an intermediate layer in the above.

As the intermediate layer, for example, an aluminum foil, an aluminum vapor deposition polyester film, an inorganic oxide vapor deposition polyester film, a polyamide film, or the like can be used. Further, in order to laminate the intermediate layer, it is possible to attach the intermediate layer by a dry laminating method via an adhesive layer.

  As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide are used. it can. Among them, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable in terms of productivity and price.

As shown in the cross-sectional view of FIG. 3-4, the resin-made chuck needs to be made of a fusible thermoplastic resin in order to be fused with the sealant layers of the front film and the rear film.
In addition, a resin having high flexibility and resistance to rubbing is required for opening and closing.
Therefore, linear low density polyethylene, medium density polyethylene, high density polyethylene, low density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, ethylene / methacrylic acid copolymer, ethylene / ethylene A resin such as a methyl acrylate copolymer, or a mixed resin thereof can be used. These resins can be extrusion-molded by attaching a special die and a sizing die to an extrusion molding machine, and can be manufactured at high speed and at low cost.

  The easy-open line may be a half-blanked piece with a sharp blade and a cutting blade only in the base material layer, but it may be an easy-open line that is irradiated by scanning with a laser beam such as a carbon dioxide gas laser. Absent.

The pouch of the present invention is as described above, and the pouch of the present invention is a container having a closing mechanism that does not use an expensive plug or cap that is formed by injection molding.
The opening can be opened and closed simply by fusing an inexpensive resin-made chuck made by extrusion molding, and the spout is narrower, so it is easier to pour than a simple zipper bag, and it is a container with good usability. ..
We can use a general-purpose production line to fuse the resin chuck, it can be manufactured at high speed and at low cost, the amount of resin used is small, and it is surely sealed when it is not opened. It is possible to sufficiently suppress deterioration of objects. Further, even if the content has a high viscosity, the amount of the residual amount is small and the content can be poured out to the end.

1 ... Pouch 101 ... Front film 102 ... Rear film 11 ... Upper side 110 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Left side 13 ・ ・ ・ ・ ・ ・ Right side 14 ・ ・ ・ ・ ・ Bottom 15 ・ ・ ・ ・ ・ Storage 16 ・ ・ ・ ・ Narrowing opening 2 ····························································· / ··························· ... Opening part 31, 32 ... Opening start part 4 ... Bottom intermediate film 5 ... Spout 51 ... Spout 6 ... ·······cap

Claims (3)

A pouch in which laminated films are superposed, and a surrounding upper side portion, a left side portion, a right side portion, and a bottom side portion are sealed or folded and closed to form a storage portion inside,
The left and right side seals extend inwardly on the one side or on the intersecting inclined part of two adjacent sides, and a narrow opening formed of an unfused part is formed inside thereof.
A pouch in which the narrow opening can be opened and closed by a resin chuck. At the fusion-bonding side that forms the narrow opening, the laminated films that are superposed are
An unfused portion is provided outside the resin chuck, and a fusion closure portion is provided further outside the unfused portion.
The pouch according to claim 1, further comprising an opening portion that can be opened by tearing from at least one of the outer unfused portions.   The pouch according to claim 2, wherein the opening portion is formed by an easy-open line that can be easily torn.

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