JP2018158732A - Packing bag with spout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost refillable packing bag which enables stable production, easy opening, easy pour-out and no leakage when refilling.SOLUTION: In a packing bag with a spout 1, a packing bag 2 has at least a front face film and a rear face film with both rims fusion bonded, and a spout 3 is sandwiched between the front face film and the rear face film around the packing bag, and is fusion bonded together. The spout has a part projecting out of the packing bag for fusion bonding, and there are a fusion bonded part 32 where the spout and the packing bag are fused together, and a fusion bonded tip 310 where the tip of the spout projecting out of the packing bag is fusion bonded for closing. Between the fusion bonded part with the packing bag and the fusion bonded tip, the spout has a fragile part 33 which is tearable for opening.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag for storing contents for refilling for refilling a bottle or the like, preventing leakage at the time of refilling, and relates to a packaging bag that can be easily opened and refilled.

In recent years, film containers with a reduced amount of resin used for simplification and refilling are more frequently used than containers for storing liquids such as shampoos and rinses.
In particular, easy-to-use pump-type containers are easy to pour out, but are expensive, so inexpensive refill packaging bags made of film have been used to transfer to blow-molded containers with pump dispensers. .
However, transferring the contents from the packaging bag to the blow-molded container is not only troublesome, but it cannot be completely transferred and remains, or it is difficult to transfer and spills the contents. The packaging system was not suitable for the elderly and children.

For the above problems, in Patent Document 1, at least a part of the packaging bag formed by heat-sealing the films and the film between the packaging bag is temporarily crushed elastically with a seal plate, A spout-equipped packaging bag having a cylindrical spout that is heat-sealed between films is proposed.
This packaging bag is manufactured by a method in which a spout has a flexible cylindrical shape, and the spout wall thickness on the heat fusion side is set to be thicker than the other, thereby creating a fusion condition that does not close by fusion.

However, such delicate sealing conditions make it difficult to cope with changes in room temperature and slight changes in wall thickness during manufacturing, and the inner surfaces of the spouts are fused together, making it impossible to reliably fuse them. The rate was high and there was a big problem with productivity.
Further, this spout is premised on processing a threaded portion at the tip and fitting a cap, and so on, so that it becomes very expensive and has a problem that it is not suitable as a disposable refill container.

Japanese Patent No. 4871101

  Therefore, a refillable packaging bag can be stably produced, easily opened, easily poured out, and refilled without leaking to obtain an inexpensive packaging bag container, It is the subject of the present invention.

The packaging bag of the present invention is
A packaging bag in which a film is disposed at least on the front surface and the rear surface, and its periphery is fused;
A spout sandwiched between a front film and a rear film around the packaging bag and fused,
A part of the spout jumps out of the packaging bag and fuses,
A fusion part where the spout and the packaging bag are fused;
And having a tip fused portion that is fused and closed at the tip of the spout that protrudes outward from the packaging bag,
It is a packaging bag with a spout characterized by having a fragile part which can be opened by breaking at a spout between a fusion part with a packaging bag and a tip fusion part.

It is an example of the packaging bag with a spout of this invention, and is the perspective view. It is an example of the spout used for the packaging bag with a spout of this invention, and is the perspective view of the spout which sealed the front-end | tip, its front view, and the perspective view which shows the opening process. It is a perspective view which shows the state currently refilled to the bottle from the packaging bag with a spout of this invention. It is a side view which shows the perspective view of another example of the spout used for the packaging bag with a spout of this invention, its front-end seal state, and its opening process.

Hereinafter, the example of embodiment of the packaging bag with a spout of this invention is described in detail using figures.
As shown in FIG. 1, the spout-equipped packaging bag 1 of the present invention was sandwiched and fused between a packaging bag 2 formed into a bag shape with a film, a front film 21 and a rear film 22 around the packaging bag. It is composed of spout 3.
The spout 3 partly jumps out of the packaging bag 2 and is fused, and the spout 32 where the spout and the packaging bag are fused and the tip of the spout that jumps out of the packaging bag are fused. And the tip fusion part 310 closed.
Further, the spout 3 has a fragile portion 33 that can be broken and opened between the fusion portion 32 with the packaging bag 2 and the tip fusion portion 310.

  As shown in FIG. 1, the packaging bag is preferably a standing pouch having a large capacity by sandwiching the intermediate film 23 on the bottom surface side to increase the capacity. However, the packaging bag is not necessarily limited to the standing pouch.

  Moreover, it is preferable that the inner side edge part of the spout packaging bag protrudes in the packaging bag. When protruding into the packaging bag, even the highly viscous content tends to flow along the protruding spout. Moreover, it becomes difficult to generate | occur | produce that the spout inner side front end is covered with a packaging bag film, and obstruct | occludes the flow poured out.

FIG. 2 is a first embodiment of the spout 3 used in the packaging bag with a spout of the present invention.
As shown in FIGS. 2A and 2B, the spout 3 of the first embodiment is a spout 3 manufactured by blow molding or injection molding, and the front end fusion sealed with the fragile portion 33. Between the part 310, in order to fracture | rupture the weak part 33, it has the finger ring shape part 34 for making it easy to tear strongly.

In order to produce this spout, in the case of blow molding, an extruded parison sufficiently larger than the diameter of the spout is used. The finger ring-shaped part 34 is formed by sandwiching an extruded parison from both sides. The fragile portion 33 is preferably fixed by sandwiching the upper and lower sides of the parison in advance, sandwiching the parison in a state where air is slightly inside with a blow mold, and then blowing it.
When manufacturing by injection molding, the gap between the core and the mold is only narrowed, but a highly fluid resin is used.

  As shown in the perspective view of FIG. 2-3, when the finger is hooked on the finger ring shape portion 34 and pulled strongly, the fragile portion 33 can be broken.

If a multi-layer extrusion parison is used for this spout, a resin having a low melting point that is easy to fuse can be arranged on the outside, and a resin having a high melting point that is difficult to fuse can be arranged on the inside.
In the case of injection molding, it is also possible to make a multilayer by using a multicolor injection molding machine having a plurality of injection cylinders and movable mold mounting plates.

Further, the finger ring-shaped portion 34 is not necessarily annular, but protrudes into a shape that allows easy application of force so that the fragile portion can be broken. For example, the finger ring-shaped portion 34 may be pushed and easily broken by using the lever principle. Absent.
In any case, it is desirable to form the finger ring-shaped part 34 and the fragile part 33 simultaneously with the spout.

FIG. 3 is a perspective view showing a state in which the bottle 4 is refilled from the spout-equipped packaging bag 1 of the present invention.
Since the spout-equipped packaging bag 1 of the present invention can be attached with a soft, thin and long spout 3, the spout can be inserted deeply into a refilled bottle container or the like.
For this reason, the spout 3 which has the protrusion length of sufficient length from the packaging bag 2 is preferable. If the tip of the spout 3 can be reliably inserted into the refill destination bottle mouth, the contents can be reliably refilled without leaking.

  FIG. 4 shows a second embodiment of the spout 3 used in the packaging bag 1 with a spout of the present invention. FIG. 4A is a spout 3 in which a spout formed into a cylindrical shape by the extrusion molding is cut into a predetermined length and the outer surface thereof is shaved or the fragile portion is processed by heat processing or the like. Various configurations can be made. Of course, the cross section is not limited to a cylindrical shape, but may be a rhombus shape or a boat shape so that an excessive force is not applied to both ends to be fused.

  As shown in the perspective view of FIG. 4-2 and the front view of FIG. 4-3, the end portion 31 at the tip is fused to form the tip fused portion 310 and the spout 3.

  4-4 is a perspective view showing an unsealing process in which the spout 3 with the spout 3 fused to the packaging bag 2 is broken at the fragile portion 33. FIG.

When the spout is a single layer or multiple layers, a thermoplastic resin that can be fused at a low temperature is used as a sealant for the outer layer so as to be easily fused with the packaging bag. For example, high pressure method low density polyethylene (melting point 108-122 ° C.), linear low density polyethylene (melting point 125-128 ° C.), medium density polyethylene (melting point 120-124 ° C.), high density polyethylene (melting point 127-134 ° C.) , Ethylene / propylene copolymer (melting point 135 to 165 ° C.), polypropylene (melting point 135 ° C.), ethylene / vinyl acetate copolymer (melting point 70 to 85 ° C.), ethylene / methacrylic acid copolymer (melting point 79 to 110) ° C.), ethylene / acrylic acid copolymer (melting point: 83 to 97 ° C.), and ethylene / ethyl acrylate copolymer (melting point: 83 to 97 ° C.).
Whether it is a single layer or multiple layers, it is desirable that the resin layer be sufficiently thick with respect to the film thickness of the packaging bag.

In addition, when the spout is made into a multilayer, the inner layer may be made of a resin having a melting point higher than that of the outer layer so that the inner layers do not fuse with each other when the spout is fused to the packaging bag. preferable.
Depending on the sealant of the outer layer used, for example, ethylene / propylene copolymer (melting point 135 to 165 ° C.), polypropylene (melting point 135 ° C.), polyethylene terephthalate (melting point 263 ° C.), polybutylene terephthalate (melting point 224 ° C.), polymethyl Penten (melting point 240 ° C), MXD6 nylon (melting point 237 ° C), 6,12-nylon (melting point 210 ° C), polysulfone (melting point 200 ° C), polysulfone (melting point 200 ° C), polyoxymethylene (melting point 181 ° C), etc. Conceivable.
Such a resin not only has a high melting point, but also has a high rigidity. Therefore, if there is a chance to break, it is easy to break, and the spout tip is easily inserted into the refill bottle. Further, when the finger ring shape portion is formed, rigidity is increased and workability is improved.
Furthermore, in the case of a combination in which the sealant layer and the inner layer are not easily fused, the adhesion to the outer layer may be improved by modification or multilayering such as maleic anhydride modification or blending.

The front film, rear film, and intermediate film used in the packaging bag of the present invention are heat-resistant, such as linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, and ethylene / vinyl acetate copolymer. A laminated film in which a plastic resin is used and a resin film such as a biaxially stretched polyethylene terephthalate resin, a biaxially stretched polyamide resin, or a biaxially stretched polypropylene resin is laminated on the outside as a base material can be used.
In addition, a metal foil such as aluminum or a vapor deposition layer on which metal oxide such as silicon oxide is deposited is laminated between the inner surface and the substrate, or a highly flexible resin layer such as polyamide is laminated. The laminated film may have a high barrier property to improve the long-term storage stability of the contents, or a high drop strength.
These can be manufactured by a general dry lamination machine or an extruder lamination machine.

The packaging bag with a spout of the present invention is as described above, and does not use a cap. Therefore, a cap mold or molding is not required, and the number of parts is small. Since there is no need for a shape that fits into the cap, the spout can be processed thinly, and the material cost and weight can be reduced, so that it can be manufactured at low cost.
Moreover, since the weak part is only physically broken and opened, anyone can open it easily. And since a spout can be elongated, a spout can be inserted deeply in the bottle mouth end of a spout destination. For this reason, the spout does not come off during refilling and can be reliably filled.
Furthermore, it can be refilled in a stable state, and even if the spout is soft and the content is highly viscous, it can be easily squeezed out and the spout outer diameter is small, so that The merit of the present invention is high such that the remaining amount remaining in the packaging bag can be reduced.

1 ... Packaging bag with spout 2 ... Packaging bag 21 ... Front film 22 ... Rear film 23 ... .... Intermediate film 3 ... Spout 31 ... End 310 ... End fusion part 32 ... Fusion part 33 ... ··· Fragile portion 34 ········ Finger ring shape portion 4 ········· Bottle

Claims (3)

A packaging bag in which a film is disposed at least on the front surface and the rear surface, and its periphery is fused;
A spout sandwiched between a front film and a rear film around the packaging bag and fused,
A part of the spout jumps out of the packaging bag and fuses,
A fusion part where the spout and the packaging bag are fused;
And having a tip fused portion that is fused and closed at the tip of the spout that protrudes outward from the packaging bag,
A spout between a fusing part with a packaging bag and a front fusing part has a fragile part which can be broken and opened and has a spout.   The packaging bag with a spout according to claim 1, wherein the spout is a multilayer spout, and comprises at least an outer layer made of a sealant and an inner layer made of a thermoplastic resin having a melting point higher than that of the outer layer. .   The packaging bag with a spout according to claim 1 or 2, wherein an inner end portion of the packaging bag of the spout protrudes into the packaging bag.

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