JP6657930B2 - Flexible packaging - Google Patents

Description

  The present invention relates to a flexible package.

  2. Description of the Related Art As a package for packaging contents such as a liquid, a viscous body, a powder, and a solid, a flexible package formed by laminating films and sealing a peripheral portion thereof is known.

  The flexible package is manufactured, for example, by inserting a folded bottom film between two side films from the fold side and sealing a peripheral portion between the films that are in contact with each other. In such a flexible package, it is possible to make the two side films cylindrical at the bottom by expanding the bottom film and thereby to be self-supporting.

  As an example of such a resealable mechanism for a flexible package, there is known a spout and a spout and a cap having a cap screwed to the spout provided at an opening. FIG. 5A shows a flexible package having a resealable plug according to the related art. Such a plug member is manufactured by injection molding with a mold, and is attached to the flexible package body and sealed using a predetermined facility. While the plug member manufactured in this manner 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, opening and closing with screws requires operation with both hands. Particularly in the case of a soft 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, loosening, and overrun.

  As another example, there has been known a mechanism that allows resealing by sandwiching an opening of the opened flexible package with a clip separate from the flexible package. FIG. 5B shows a flexible package provided with a resealing clip according to the prior art. While such clips are resealable, the amount of resin required for manufacture is likely to increase. There are also problems such as the need for operation with both hands when opening and closing, and the difficulty in sealing due to the repeated opening and closing due to the tendency of the flexible package to bend.

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

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

One aspect of the present invention for solving the above-mentioned problem has a plurality of films including at least a first side film and a second side film, and a peripheral portion of each of the plurality of films is sealed. A flexible package body having a storage portion surrounded by a portion, the opening portion provided at a portion of the end of the storage portion where the first side film and the second side film face each other, An inner part attached to one of the first side film and the second side film at a position covering a line that is formed of a plate-like elastic member and that divides the storage portion into a portion including the planned opening portion and another portion. And an elastic member including a curved portion having a curved cross-sectional shape, attached to surround the inner part, the first side film and the second side film, and It comprises an outer part which sandwich the other of the side film and the second side film, the outer part, the inner part, curved in a direction along the curved portion over the entire surface, a first side film and the second side film The inner part is held in the first state in which no gap is generated between the first part and the second state in which the inner part is bent in the opposite direction to the direction and the gap may be generated, and the bending direction of the inner part is changed. A flexible package that can be switched between the first state and the second state by being reversely deformed by an external force.

Further, another aspect of the present invention has a plurality of films including at least a first side film and a second side film, and a peripheral portion of each of the plurality of films is sealed. A flexible package having an enclosed storage portion, wherein an 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, and a plate-shaped elastic member. One of the first side film and the second side film from the inside and outside of the flexible package at a position that covers a line that is formed of a member and divides the storage portion into a portion including the planned opening portion and another portion. A first inner part, a second inner part, and an elastic member including a curved portion having a curved cross-sectional shape. The first inner part, the second inner part, the first side film, and the second inner part. ~ side An outer part attached to surround the film and sandwiching the other of the first side film and the second side film between the curved portion and the inner part, the outer part comprising a first inner part and a second inner part; Are curved in the direction along the curved portion over the entire surface , and a first state in which no gap is formed between the first side film and the second side film, and both are curved in the opposite direction. By holding the inner part in any one of the second states where the gap can occur, the bending direction of the first inner part and the second inner part is reversed and deformed by an external force, thereby forming the second part . A flexible package capable of switching between a first state and a second state.

  According to the present invention, it is possible to provide a flexible package having a simple structure, a sufficient sealing property, and an easy-to-operate resealing mechanism.

Plan view of a flexible package according to an embodiment of the present invention The figure which shows the reseal part which concerns on one Embodiment of this invention. Sectional drawing which shows the mode of resealing and opening of the resealing part which concerns on one Embodiment of this invention. Sectional drawing which shows the reseal part which concerns on one Embodiment of this invention. The figure which shows the resealing means of the flexible package which concerns on a prior art.

(First embodiment)
FIG. 1 shows a plan view of a flexible package 100 according to the present embodiment. The flexible package 100 includes a first side film 101, a second side film 102, and a bottom film 103 inserted from the fold side in a two-fold state between the first side film 101 and the second side film 102 with a predetermined insertion length. It is formed together. The peripheral portion between the films which are in contact with each other is sealed except for the location for injecting the content, and after filling the content, the above location is sealed and hermetically sealed to thereby store the content in the storage portion 105. Is formed. The content is a liquid, a viscous body, a powder, a solid, or the like, and is not particularly limited.

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

  In addition, the flexible package 100 is provided with a pouring section 104 which is an opening section where an opening is planned for pouring out the contents. As an example, as shown in FIG. 1, the pouring section 104 has a nozzle shape so as to be easily poured, and is formed at an upper side end. By cutting off the tip of the pouring section 104, an opening is formed and the storage section 105 of the flexible package 100 is opened. A notch serving as a trigger may be provided at the outer edge portion, or a half cut may be provided along a cut line so as to facilitate cutting. A resealing part 110 is provided on a line that divides the flexible package 100 into a part including the extraction unit 104 and another part. As an example, in the vicinity of the pouring section 104, there is provided a narrow section 106 that forms a part of the flexible package 100 in a narrow and narrow shape as a flow path for contents, and a resealing part 110 is provided in the narrow section 106. It is attached.

  The details of the reseal part 110 will be described with reference to FIG. FIG. 2A shows a plan view of the resealing part 110 attached to the flexible package 100 and a cross-sectional view thereof along line A-A ′. The resealing part 110 includes an inner part 120 and an outer part 130. The inner part 120 is a plate-shaped member, and the outer part 130 is a member having a C-shaped cross-sectional shape and a cylindrical shape with a part of a side surface removed. The inner part 120 is sandwiched between the first side film 101 and the second side film 102 at the narrow portion 106 of the flexible package 100. The outer part 130 is attached so as to surround the inner part 120 from the outside of the first side film 101 and the second side film 102. In the illustrated example, the first side film 101 is located between the inner part 120 and the outer part 130, and the second side film 102 is located on the opposite side of the first side film 101 with respect to the inner part 120.

  FIG. 2B is a perspective view of the inner part 120 and the outer part 130, and FIG. 2C is a plan view of the state where only the inner part 120 is attached to the flexible package and its BB ′ line. FIG.

  The inner part 120 is a plate-like member made of a rectangular elastic material, as shown on the left side of FIG. As shown in FIG. 2C, it is preferable that the inner part 120 exists over the entire width L of the flow passage. For the inner part 120, a material having a large elastic limit can be used, and for example, a resin, a metal, or the like can be suitably used. For forming the inner part 120, for example, a punching process can be used.

  As shown on the right side of FIG. 2B, the outer part 130 is made of an elastic material. As shown in FIG. 2A, the outer part 130 holds the inner part 120 inside it in a curved state. The outer part 130 includes a curved portion 133 having a curved shape and two locking portions 131 extending from both ends of the curved direction in such a manner that the outer part 130 does not come off from the constricted portion 106 where the inner part 130 is located. Become. The outer part 130 may be formed by vacuum molding, extrusion molding, injection molding, or the like using a resin having a large elastic limit, such as a resin, or may be formed using metal.

  The inner part 120 is adhered to the second side film 102 on the opposite side of the curved portion 133. The bonding method is not limited, and a method such as welding or a hot-melt pressure-sensitive adhesive can be used. The bonding area may be a part of the inner part 120 or the entire surface. The inner part 120 is not bonded to the first side film 101.

  With reference to FIG. 3, a method of resealing and resealing using the resealing part 110 will be described. FIG. 3 is a cross-sectional view of the constriction 106 of the flexible pouch 100 including the resealing part 110. It is assumed that the flexible pouch 100 has already been opened by cutting off the tip of the pouring section 104.

  First, a state in which the storage unit 105 is resealed by the resealing part 110 and a method of resealing from that state will be described with reference to FIG. In the state shown on the left side of FIG. 3A, the inner part 120 and the second side film 102 adhered thereto are bent toward the bending portion 133, and the first side film 101 is moved to the inner part 120. And the curved portion 133. Thus, no gap is formed between the first side film 101 and the second side film, and the storage section 105 is resealed.

  As shown on the left side of FIG. 3A, weight is applied in the direction of the illustrated white arrow so that the bending direction of the bending portion 133 is reversed. As a result, as shown in the center of FIG. 3A, the directions of the first side film 101, the second side film 102, and the inner part 120 are also reversed. Thereafter, when the load is stopped, the curved portion 133 returns to its original shape due to elasticity, as shown on the right side of FIG. On the other hand, the inner part 120 is held by the outer part 130 while the bending direction is reversed, and is separated from the bending part 133 side together with the second side film 102. As a result, as shown on the right side of FIG. 3A, the inner part 120 and the first side film 101 have a larger space therebetween, or are separated with the ejection of the contents, and are reopened. Is performed.

  Next, a method of resealing the resealed storage section 105 with the resealing part 110 will be described with reference to FIG. First, as shown on the left side of FIG. 3B, the inner part 120 curved to the opposite side to the bending direction of the bending portion 133 is illustrated so that the direction of the bending is reversed to the bending portion 133 side. Weight in the direction of the white arrow. When the inner part 120 bends toward the bending portion 133 side, the state returns to a state where no gap is formed between the first side film 101 and the second side film, and the storage unit 105 is resealed.

  As described above, if the resealing part 110 is used, the resealing / resealing operation can be performed only by applying a weight to the curved portion 133 of the outer part 130 or the inner part 120. For example, since the weighting can be performed with one finger, the resealing and resealing operations are very easy.

FIG. 4 shows a cross-sectional view of a resealing part according to another embodiment. Hereinafter, another embodiment will be described with reference to FIG. The same or corresponding components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In any case, the same resealing and resealing effects as in the first embodiment can be obtained.
(Second embodiment)
The resealing part 111 according to the first embodiment is different from the resealing part 110 according to the first embodiment in that the curved portion 133 and the first side film 101 are adhered to each other as shown in FIG. And different. By bonding the curved portion 133 and the first side film 111, the first side film 101 is securely separated from the inner part 120 together with the curved portion 133 when the storage portion 105 is resealed. Certainty can be increased.

(Third embodiment)
As shown in FIG. 4B, the resealing part 112 according to the present embodiment further moves the second inner part 121 held inside the outer part 130 outside the package of the second side film 102. It differs from the resealing part 110 according to the first embodiment in that it is provided. The second inner part 121 deforms in the same manner as the inner part 120 according to the first embodiment, and at the time of resealing, the second side film 102 is moved in the direction of the curved portion 133 by the second inner part 121. Pressed. For this reason, the inner part 120 and the second side film 102 need not be bonded.

(Fourth embodiment)
The resealing part 113 according to the present embodiment differs from the first embodiment in that the inner part 120 is adhered to the outside of the package of the second side film 102 as shown in FIG. Different from sealed part 110. Even if the inner part 120 is provided outside the second side film 102, the inner part 120 deforms in the same manner as the inner part 120 according to the first embodiment. Both of the second side films 102 are sandwiched between the curved portion 133 and the second side film 102 so that no gap is generated.

  The flexible package provided with the resealable parts 110 and 113 described above was manufactured as follows, and the sealing performance and the operability were evaluated.

  The container body of the flexible package 100 for manufacturing the resealable part 110 was manufactured as follows. First, the inner part 120 is attached to a place where the constricted portion 106 of the film to be the material of the second side film 102 is to be formed with a hot-melt adhesive, and then the material of the first side film 101 is placed thereon. And the two films were cut into the shape of the flexible package 100. Thereafter, the container body of the flexible package 100 capable of storing 1 liter of liquid was manufactured by heat-sealing the periphery. The inner part 120 used polypropylene, polyethylene terephthalate, and polyethylene as each Example.

  The container body of the flexible package 100 for manufacturing the resealing part 113 was manufactured as follows. First, a film serving as the material for the first side film 101 was overlaid on a film serving as the material for the second side film 102, and both films were cut into the shape of the flexible package 100. Thereafter, the container body of the flexible package 100 capable of storing 1 liter of liquid was manufactured by heat-sealing the periphery.

  Using polypropylene, polyethylene terephthalate, and polyethylene as examples, in the cross section shown in FIGS. 3 and 4, the width of the bending portion 133 in the bending direction is 30 mm, the width along the orthogonal direction is 20 mm, and the plate thickness is 0.4 mm. The outer part 130 having a curvature radius of the curved portion 133 of 30 mm was manufactured by injection molding.

  The manufactured outer part 130 was attached to each container body, and the resealed part 110 and the resealed part 113 were manufactured. Note that a hot-melt adhesive was used for attaching the resealed part 113 to the second side film 102 and the inner part 120.

  The leading end of the spouting part of each manufactured flexible package 100 was cut off, and the storage part 105 was sealed with resealing parts 111 and 113. Thereafter, it was checked whether or not water leakage occurred from the resealing parts 111 and 113 while the flexible package 100 was laid on its side. As a result, water leakage did not occur, and it was confirmed that there was sufficient sealing performance.

  Also, it was evaluated whether the resealing parts 111 and 113 can easily seal and open the storage section 105 with one hand. As a result, it was confirmed that sealing and opening can be easily performed even with one hand.

  As described above, according to the present invention, the resealable part can be opened and resealed by a simple operation with one hand, so that the reseal of the package and the release thereof can be easily performed.

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

  Further, since the resealed parts are formed by a minimum of two parts, it is possible to suppress the manufacturing cost of the material, the mold, the time, the mounting and the like.

  In addition, since there is no need to bend the pouring portion at the time of resealing, the contents do not leach out, the outer surface is hardly stained, and the habit is hardly formed.

  Also, since the resealing parts do not participate in the initial sealing or the initial opening, it is not necessary to provide a function for tamper evidence, and the design is easy.

  In addition, since the outer part 130 of the resealable part can be attached even after the contents are filled, even if the contents are to be subjected to retort processing, it can be used without concern for thermal deformation.

  It should be noted that the present embodiment may be appropriately modified and implemented. For example, a rib may be provided on each part, or a concave structure and a convex structure may be provided on opposing parts of a part and other parts, respectively, to enhance the pressing or sandwiching of the film to enhance the sealing performance. The outer part 130 may be manufactured by combining a plurality of members. Further, the inner part 120 is provided over a sufficient range in the width direction near the opening, and the outer part 130 is formed by bending the inner part 120 along the inner wall of the curved portion 133 and in the opposite direction. The shape and size are not limited as long as they can be held, and various implementations are possible. Further, such a resealing part can be used not only for a self-supporting package having a bottom film as described above, but also for a four-sided bag having no bottom film.

  The present invention is useful for a flexible package or the like.

DESCRIPTION OF SYMBOLS 100 Flexible package 101 1st side film 102 2nd side film 103 Bottom film 104 Outflow part 105 Storage part 106 Constriction part 110,111,112,113 Resealable parts 120,122 Inner parts 121 Second inner parts 130 Outer part 131 Locking part 133 Curved part

Claims (5)

Flexible packaging having a plurality of films including at least a first side film and a second side film, wherein a peripheral portion of each of the plurality of films is sealed, and a storage portion surrounded by the sealed portions is provided. Body
An opening portion provided at a portion of the end of the storage portion where the first side film and the second side film face each other;
At least one of the first side film and the second side film is formed of a plate-like elastic member, and is attached to a position covering a line dividing the storage portion into a portion including the expected opening portion and another portion. Inside parts,
It is made of an elastic member including a curved portion having a curved cross-sectional shape, and is attached so as to surround the inner part, the first side film and the second side film, and is provided between the curved part and the inner part. Outer parts sandwiching the other of the first side film and the second side film,
In the outer part, a first state in which the inner part is curved over the entire surface in a direction along the curved portion, and no gap is formed between the first side film and the second side film, and the direction Holding the inner part in one of the second states in which the gap may occur,
A flexible package body capable of switching between the first state and the second state by reversing the bending direction of the inner part with an external force.   The flexible package according to claim 1, wherein the inner part is bonded to the one of the first side film and the second side film from inside the flexible package.   The flexible package according to claim 1, wherein the inner part is bonded to the one of the first side film and the second side film from outside the flexible package.   The flexible package according to any one of claims 1 to 3, wherein the outer part is bonded to the other of the first side film and the second side film on an inner wall of the curved portion. Flexible packaging having a plurality of films including at least a first side film and a second side film, wherein a peripheral portion of each of the plurality of films is sealed, and a storage portion surrounded by the sealed portions is provided. Body
An opening portion provided at a portion of the end of the storage portion where the first side film and the second side film face each other;
One of the first side film and the second side film is formed of a plate-shaped elastic member, and at a position covering a line dividing the storage portion into a portion including the planned opening portion and another portion, A first inner part and a second inner part sandwiched between the inside and the outside of the flexible package;
The first inner part, the second inner part, the first side film, and the second side film are attached to surround the first member, the second member, and the first member. An outer part sandwiching the other of the first side film and the second side film between a curved portion and the inner part,
In the outer part, both the first inner part and the second inner part are curved in a direction along the curved portion over the entire surface , and a gap between the first side film and the second side film is reduced. Holding the inner part in a first state that does not occur, and in one of a second state in which both curves in the opposite direction to the direction and the gap can occur,
A flexible package body capable of switching between the first state and the second state by reversing and deforming the bending direction of the first inner part and the second inner part by an external force.