JP6808933B2 - Flexible packaging - Google Patents

Description

The present invention relates to a flexible packaging.

As a packaging body for packaging contents such as liquid, viscous body, powder, and solid, a flexible packaging body formed by stacking films and sealing the peripheral portion thereof is known.

The flexible packaging is manufactured, for example, by inserting a bottom film folded in half between two side films from the crease side and sealing the peripheral edges between the films in contact with each other. In such a flexible package, it is possible to make the bottom film self-supporting by spreading the bottom film and forming the two side films into a tubular shape at the bottom.

As an example of such a resealable mechanism of a flexible package, a spout and a spout having a cap having a cap screwed with the spout are provided in the opening. FIG. 8A shows a flexible packaging body provided with a resealable spout according to the prior art. Such a spout member is manufactured by injection molding with a mold, and is attached to a flexible packaging body body and sealed by using a predetermined facility. While the spout member manufactured in this way can be resealed, the amount of resin is large, so that the manufacturing cost tends to be high in terms of equipment, time, and material. In addition, since it is opened and closed with screws, it is necessary to operate it with both hands. Especially in the case of a flexible package, it is difficult to apply torque for opening and closing and it is difficult to handle. In addition, the structure is complicated, and there are many troubles such as partial loss, looseness, and overrun.

As another example, there is known a mechanism that enables resealing by sandwiching the opening of the flexible package after opening with a clip that is separate from the flexible package. FIG. 8B shows a flexible packaging body provided with a resealing clip according to the prior art. While such clips can be resealed, they tend to require more resin to manufacture. In addition, there are problems that it is necessary to operate with both hands when opening and closing, and that the flexible packaging has a crease, which makes it difficult to seal the flexible package as the opening and closing are repeated.

As described above, a suitable resealing mechanism has not been sufficiently studied in the conventional flexible packaging.

Therefore, it is an object of the present invention to provide a flexible package having a simple structure, sufficient sealing performance, and an easy-to-operate resealing mechanism at low cost.

One aspect of the present invention for solving the above problems has a plurality of films including at least a first side film and a second side film, and the peripheral edges of the plurality of films are sealed over the entire circumference. A flexible packaging body having a storage portion surrounded by a sealed portion, which is planned to be opened at an end portion of the storage portion where the first side film and the second side film face each other. The inside of the curved portion is located at a position covering a line that divides the storage portion into a portion including the planned opening portion and another portion, which is composed of a portion and a plate-shaped elastic member including a curved portion having a curved cross-sectional shape. The first side film and the second side film are composed of a first member attached to one of the first side film and the second side film so as to face the outside of the flexible package and a plate-shaped elastic member. The other side of the side film includes a second member attached from the outside of the flexible packaging, and the first member and the second member face each other with the first side film and the second side film interposed therebetween. and, end each other in a state where the second member is deformed is fixed, the central portion of the second member, and protrudes to the first member, the gap between the first side film and the second side film In the first state in which the above does not occur, the curved portion of the first member is weighted toward the second member to deform the first member and the second member to change the protruding direction of the central portion of the second member. After inverting to the opposite side of the first member, the load is stopped and the first member is elastically restored to create a gap between the first member and the second member, whereby the first side film. It is possible to shift to a second state in which a gap may be formed between the second side film and the second side film. In the second state, the central portion of the second member is weighted toward the first member side to obtain the second member. It is a flexible package that can shift to the first state by reversing the protruding direction of the central portion of the film toward the first member .

According to the present invention, it is possible to provide a flexible package having a resealing mechanism that can obtain sufficient sealing performance with a simple structure and is easy to operate.

Top view of a flexible package according to an embodiment of the present invention The figure which shows the resealing part which concerns on one Embodiment of this invention. The figure which shows the resealing part which concerns on one Embodiment of this invention. Sectional drawing which shows the state of opening of the resealing part which concerns on one Embodiment of this invention. Sectional drawing which shows the state of resealing of the resealing part which concerns on one Embodiment of this invention. Top view of a flexible package according to an embodiment of the present invention Sectional drawing which shows the resealed part which concerns on embodiment of this invention The figure which shows the resealing means of the flexible packaging body which concerns on the prior art.

(First Embodiment)
FIG. 1 shows a plan view of the flexible packaging body 100 according to the present embodiment. In the flexible packaging body 100, the first side film 101, the second side film 102, and the bottom film 103 inserted from the crease side in a folded state with a predetermined insertion length are overlapped between them. Formed together. The peripheral portion between the films in contact with each other of these films is sealed except for a portion for injecting the contents, and after filling the contents, the above portion is sealed and sealed to store the contents. Is formed. The contents are liquid, viscous, powder, solid and the like, and are not particularly limited.

As the material of each film, for example, a laminate containing resin or aluminum and having a certain rigidity can be used. As an example of the laminate, a laminate containing polyethylene terephthalate, aluminum, nylon, and polyethylene can be mentioned.

Further, the flexible packaging body 100 is provided with a pouring portion 104, which is a planned opening portion for pouring the contents. As an example, the dispensing portion 104 has a nozzle shape for easy dispensing and is formed on the upper side end. By cutting off the tip of the injection portion 104, an opening is formed and the storage portion 105 of the flexible packaging body 100 is opened. To facilitate cutting, a notch that serves as a trigger may be provided at the outer edge, or a half cut may be provided along the cutting line. The resealing part 110 is provided in a linear shape that divides the flexible packaging body 100 into a portion including the ejection portion 104 and other portions. As an example, a part of the flexible packaging body 100 is formed in a thin and constricted shape in the vicinity of the pouring portion 104 to form a constricted portion 106 as a flow passage for the contents, and the resealing part 110 is attached to the constricted portion 106. Be done.

The details of the resealing part 110 will be described with reference to FIG. FIG. 2A shows a plan view of the resealing part 110 attached to the flexible packaging body 100, and FIG. 2B shows a cross-sectional view taken along the line AA'. The resealing part 110 includes a first member 120 and a second member 130. As an example, the first member 120 is attached to the constricted portion 106 of the flexible packaging body 100 from the outside of the first side surface film 101. Further, the second member 130 is attached from the outside of the second side film 102 facing the first member 120.

(A) and (b) of FIG. 3 show a side view and a plan view of the first member 120 and the second member 130, respectively. The first member 120 and the second member 130 are strip-shaped members made of an elastic material. The first member 120 has a dogleg-shaped side surface shape in which the central portion is curved when no load is applied. In the vicinity of both ends of the surfaces of the first member 120 and the second member 130 in the length direction (left and right direction of the paper surface), weakening lines 121 and 131 weakening lines that make each part easy to bend extend over the width direction (vertical direction of the paper surface). It is formed. A weakening line 132 is further formed at the center of the second member 130 in the length direction. Each weakening line is formed at a depth that does not reach from the front surface to the back surface. Each weakening line may be a continuous linear groove or may be formed in a perforated pattern. As the material, a material having a large elastic limit can be used, and for example, a thermoplastic resin, a metal, or the like can be preferably used. Further, for molding, for example, vacuum forming, injection molding, extrusion molding, thermoforming, punching, etc. can be used depending on the material.

The ends of the first member 120 and the second member 130 may be connected and fixed, and the method uses methods such as welding, adhesion using a hot melt adhesive, and fixing by a boss spin and a boss hole. be able to.

Alternatively, the first member 120 and the second member 130 may be integrally manufactured by connecting the ends in advance as shown in FIG. 3C. In this case, a weakening wire 140 for bending when attached to the constricted portion 106 may be formed at the connection portion.

Next, how to use the resealing part 110 will be described. In the following description, it is assumed that the tip of the dispensing portion 104 has already been cut off and the flexible pouch 100 has been opened. 4 and 5 are cross-sectional views of the constricted portion 106 including the resealed part 110.

First, with reference to FIG. 4, a method of reopening the storage unit 105 using the resealing part 110 will be described. FIG. 4A shows the resealed part 110 in the resealed state. The first member 120 is attached so that the bent portion projects outward of the flexible pouch 100, and in the resealed state, the second member 130 is along the weakening line 132 along the first member 120. Since it bends in, there is no gap between the first side surface film 101 and the second side surface film 102. In this state, the central portion of the first member 120 is weighted in the direction of the second member 130 ((a) in FIG. 4). As a result, the bent first member 120 is extended. Along with this, the first side film 101, the second side film 102, and the second member 130 also extend in the same direction ((b) in FIG. 4). When the load is further continued, the bending direction of the second member 130 is reversed at the weakening line 132, and the second member 130 is inverted and deformed so as to project in the direction opposite to that of the first member 120 ((c) in FIG. 4). .. When the load on the first member 120 is stopped at the stage where the second member 130 is inverted and deformed, the first member 120 returns to a shape bent in the direction opposite to that of the second member 130 due to elasticity. As a result, the first member 120 and the second member 130 are bent in opposite directions to form a gap. In this state, a gap is generated between the first side film 101 and the second side film 102, or the first side film 101 and the second side film 102 are separated from each other as the contents are poured out. A road is formed and the storage portion 105 can be resealed ((d) in FIG. 4).

The first member 120 and the first side surface film 101 may be adhered, and the second member 130 and the second side surface film 102 may be adhered to each other. As the bonding method, a method such as welding or bonding using a hot melt adhesive can be used. The bonding range may be a part of the facing surfaces or the entire surface. As a result, when a gap is formed between the first member 120 and the second member 130, the first side film 101 and the second side film 102 are immediately separated from each other, so that a flow passage can be formed more reliably. ..

Next, a method of resealing the resealed storage unit 105 will be described with reference to FIG. FIG. 5A shows the resealed part 110 in the resealed state. The second resealing component 130 is weighted in the direction of the first component 120 ((a) in FIG. 5). As a result, the second component 130, which has been bent in the direction opposite to that of the first component 120, extends. Along with this, the first side film 101, the second side film 102, and the first component 120 also extend in the same direction (FIG. 5 (b)). When the load is further continued, the second member 130 is inverted and deformed so that the bending direction is reversed at the weakening line 132 and the second member 130 projects in the direction of the first member 120 ((c) in FIG. 5). As a result, the second member 130 is in a state where no gap is formed between the first side film 101 and the second side film 102 along the side of the first member 120, and the storage portion 105 is resealed. ((D) in FIG. 5).

In this way, if the resealing part 110 is used, the resealing / resealing operation can be performed only by applying a load to the first member 120 or the second member 130. Since the weighting can be performed by, for example, one finger, the resealing / resealing operation is very easy.

(Second Embodiment)
FIG. 6 shows the flexible packaging body 200 according to the second embodiment. The pouring portion 104 of the flexible packaging body 200 is provided at the corner of the rectangular side film, and the tip of the pouring portion 104 can be cut off by using the notch provided at the outer edge portion as a trigger. Unlike the flexible packaging body 100, the flexible packaging body 200 does not have a constricted portion 106, and the resealing part 110 is located in the vicinity of the dispensing portion 104 so as to straddle one side and the upper side of the flexible packaging body 100. It is attached on the line that separates the vicinity of the dispensing portion 104 from the other portion. Further, the resealing part 110 can be used not only for the self-supporting packaging body having the bottom film as described above, but also for a four-sided bag or the like having no bottom film.

The following resealing parts 110 were manufactured and their sealability and operability were evaluated.

The resealing part 110 was manufactured using a polyethylene terephthalate sheet in the shape shown in FIG. 7A. That is, the first member 120 and the second member 130 are integrally molded, and the first member 120 is 10 mm long at both ends of a dogleg-shaped bent surface having a distance of 40 mm between both ends and a height of 10 mm. It was formed so as to have a shape in which each end of the is provided. Further, the second member 130 is formed in a strip shape having a length that can be formed so as to overlap the first member 120. The width of both the first member 120 and the second member was 20 mm. Further, the weakening lines 121, 131, 132, and 140 were formed at perforations (joint 1 mm, cut 1 mm).

As shown in FIG. 7B, the hot melt adhesive is applied to the coating position 150 at the substantially central portion of each of the first member 120 and the second member 130, and then the resealing part 110 is weakened. The resealing part 110 was attached to the flexible packaging body 100 by folding it in half from 143 and sandwiching the constricted portion 106 from both sides. The hot melt adhesive was also applied to the coating position 151 at each end of the first member 120 and the second member 130 that was not on the connection point side, and the ends were adhered to each other.

The tip of the ejection portion 104 of the manufactured flexible packaging body 100 was cut off, and the storage portion 105 was sealed with the resealing part 110. After that, with the flexible packaging body 100 lying down, it was confirmed whether or not water leakage occurred from the resealed part 110. As a result, it was confirmed that no water leakage occurred and the sealability was sufficient.

In addition, it was evaluated whether the resealing part 110 could easily open and reseal the storage portion 105 with one hand. As a result, it was confirmed that opening and resealing can be easily performed even with one hand.

As described above, according to the present invention, since the resealing part can be opened and resealed by a simple operation with one hand, the package can be easily resealed and unsealed.

Further, since the resealing part presses the film in the vicinity of the opening over a certain area, it can be reliably resealed.

Further, since the resealed parts are formed by at least one part, it is possible to reduce the manufacturing cost of materials, molds, time, mounting and the like.

Further, since it is not necessary to bend the pouring portion at the time of resealing, the contents do not leached and the outer surface is not easily soiled.

Moreover, since the resealed parts are not involved in the initial sealing or the initial opening, it is not necessary to add a function for tamper evidence and the design is easy.

Further, since the resealed parts can be attached even after the contents are filled, even the contents to be retorted can be used without worrying about thermal deformation.

Further, since the resealed parts do not come into direct contact with the contents, the contents are not limited by the material of the resealed parts.

In addition, the resealed parts have a certain degree of rigidity, and by attaching them near the spout of the flexible package, the shape of the spout and the package in the vicinity is maintained, so that the vicinity of the spout is maintained during pouring. Smooth pouring can be performed without bending. .. Therefore, even when a flexible material is used for the flexible packaging body 100, it is not necessary to devise the shape of the spout or to provide a structure for stabilizing pouring such as a check valve or embossing. A simple spout structure as shown in 6 can be adopted.

In addition, this embodiment may be modified as appropriate and carried out. The resealed parts can be elastically inverted and deformed between a portion having a curved cross-sectional shape under no load and a state in which the resealed parts are arranged so as to overlap the portion and are in contact with the portion and in a separated state. The shape and size are not limited as long as they can be sandwiched over almost the entire width near the opening of the flexible package, and for example, it is not necessary to provide a weakening line, and various implementations are possible. is there.

The present invention is useful for flexible packaging and the like.

100, 200 Flexible packaging 101 1st side film 102 2nd side film 103 Bottom film 104 Outlet 105 Storage 106 Constriction 110, 140 Resealing parts 120 1st member 121, 131, 132, 140 Weakened Wire 130 2nd member

Claims (2)

A storage portion having a plurality of films including at least a first side film and a second side film, the peripheral edges of the plurality of films being sealed over the entire circumference, and a storage portion surrounded by the sealed portions. It is a flexible packaging body that has
A planned opening portion provided at a portion of the end portion of the storage portion where the first side film and the second side film face each other.
It is composed of a plate-shaped elastic member including a curved portion having a curved cross-sectional shape, and the inside of the curved portion is located at a position covering a line that divides the storage portion into a portion including the planned opening portion and another portion. A first member attached to one of the first side film and the second side film so as to face the outside of the flexible packaging.
It is composed of a plate-shaped elastic member, and includes a second member attached from the outside of the flexible package to the other of the first side film and the second side film.
The first member and the second member face each other with the first side film and the second side film sandwiched between them, and the ends are fixed to each other in a deformed state of the second member.
Central portion of the second member, out collision on the first member side, in a first state in which no gap between the first side film and the second side film, the first The curved portion of the member is weighted toward the second member to deform the first member and the second member, and the protruding direction of the central portion of the second member is set to that of the first member. After inverting to the opposite side, the load is stopped to elastically restore the first member to create a gap between the first member and the second member, thereby forming the first side film and the first member. It is possible to shift to a second state in which a gap may occur between the second side films.
In the second state, the central portion of the second member is weighted toward the first member, and the protruding direction of the central portion of the second member is reversed toward the first member. A flexible packaging body that can be transferred to the first state . The flexible packaging according to claim 1, wherein the first member and the second member are integrally formed.