JP2012148784A - Flexible packaging bag with resealing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a productive inexpensive bag that can easily reseal the opening part of an opened bag without a need of mounting another resealing member.SOLUTION: In a laminated film bag whose peripheral end edge is sealed into a bag shape, the lower side of the upper sealing part of the bag is laterally provided with unsealing means cutting off the upper sealing part to provide a content takeout port, the vertically middle part of the lower side area of the position where the unsealing means of the side sealing parts on both right and left sides of the bag is provided, laterally provided with a bag folding line to connect the middle parts to each other, and each of the positions of the sealing parts on both sides equally distanced from the vertical folding line overlapping each other when the bag is folded along the folding line, provided with a slit whose end is convex like a hook and a hole engaging with this hook-like convex part.

Description

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

Conventionally, as a re-sealable bag, for example, a lid having an adhesive layer at the time of resealing or a bag for tightly sealing a container opening, a method for fastening the opening with an attached seal, etc. The method of fastening with separate parts was the mainstream.
Furthermore, as a re-sealable bag, for example, on the inner surface of the film on both sides below the unsealable position of the bag, a male ridge fitting part called a chuck tape or zipper that can be repeatedly fitted and detached When re-sealing the opened bag, the tape body provided with the tape body provided with the female concave fitting portion is pasted so that the both fitting portions face each other. There is a bag with a zipper tape that can be re-sealed by pressing both fitting portions from the outside (see, for example, Patent Document 1).

According to the bag with the chuck tape described in Patent Document 1, as the bag resealing means, the chuck tape is usually heat sealed on the inner surface of the film on both sides below the bag opening position (inside the bag). Since the bag is resealed by fitting the fitting portions of the tape bodies on both sides, the sealing performance is relatively good and stable resealability is obtained.
However, when manufacturing a bag with a chuck tape, it is necessary to prepare a chuck tape separately from the film of the bag, and a special attachment device is also required for attaching the chuck tape. When heat-bonding, heat seals at both ends are likely to fail, and high-precision work and quality control are necessary to ensure heat-sealing. There was an inevitable problem.

  In addition, the wide seal part is provided by expanding the seal width of the left seal part and the right seal part near the mouth seal part of the packaging bag, and the slit extending toward the extension part of the mouth seal part is engraved in each wide seal part. Then, after opening, it is formed so as to obtain an opening end narrower than the bag body defined by both slits, and the film is overlapped on one outer surface of the bag body, and both left and right ends of the film There is a resealable bag having a configuration in which the insertion region of the opening end portion is provided by bonding the partial region to the outer surface region of the body portion opposed to the partial region (see Patent Document 2).

  According to the resealable bag described in Patent Document 2, in order to give a reseal function to the bag, the film is superposed on one outer surface of the bag body, and the left and right end regions of the film are separated from them. Since it is bonded to the opposite outer surface area of the body and an insertion part is provided at the opening end of the bag, when the bag is resealed, the opening end of the bag is folded and inserted into this insertion part. By doing so, a simple reseal can be performed.

  However, also in this case, in order to bond the film to the outer surface of the body of the bag, the bonding device is necessary, and usually, the outer surface of the body of the bag does not have thermal adhesiveness, Some kind of adhesive is required, and even if heat sealant or hot melt adhesive is used, it is difficult to bond firmly, and the problem is that the bonded film is caught or the bonded part is peeled off while handling the bag. It was not always satisfactory.

In Patent Document 3, there is no need to attach a separate resealing member as a means for resealing a bag, and a bag capable of resealing the opened portion of the opened bag with a simple operation is provided at low cost with high productivity. Therefore, in the bag made of laminated film formed by heat-sealing the upper and lower and left and right side edge portions, the bag opening means is provided in the lateral direction below the upper seal portion, and the left and right side seal portions are provided on the side seal portions. A wide seal portion having a wide seal width downward from the upper portion of the bag, and the intermediate portion between the upper and lower portions of the lower region of the unsealing means of the wide seal portion. The fold line is provided in the horizontal direction, and the wide seal portions on both sides at equal distances above and below the fold line are provided with locking portions that can be engaged with each other when the bag is folded back at the fold line. Resealable bags have been proposed.

  In this case, the folded portion is locked by the wide seal portions on both the left and right sides of the bag, and the upper and lower locking portions overlap each other, and the overlapping portions are engaged to lock the folded portion. In addition, since the upper and lower locking portions are formed by slits, the seal portions on the left and right sides of the portion where the slit shape is provided are wide only at the top, and the internal capacity is reduced and at the same time, the design is restricted. .

Japanese Utility Model Publication No. 1-94255 Japanese Utility Model Publication No. 61-164137 JP 2006-199343 A

  The present invention has been made in order to solve such problems, and the problem is that it does not require a resealing member separate from the bag or a mounting device for the same, and does not require normal manufacturing. The bag can be easily manufactured in the same manufacturing process as the bag, and a resealing means can be easily provided simultaneously with the bag making, and the opening of the opened bag can be easily operated by the resealing means. To provide a resealable flexible packaging bag that can be easily resealed.

  As a result of pursuing the convenience that the contents can be stored and can be easily opened and closed, the present inventors closed the opened upper portion by bending it twice, and the bent portion provided in the side seal portion and the hole It has been found that it can be achieved by the method of fastening by fitting the parts, and has reached the flexible packaging bag with a reseal function of the present invention.

  The invention according to claim 1 of the present invention is a laminated film bag formed by heat-sealing a peripheral edge portion in a bag shape, on the lower side of the upper seal portion where the upper edge portion of the bag is heat-sealed. The opening means for cutting off the upper seal part to provide a take-out port for the contents is provided in the lateral direction, and the region below the position where the opening means of the side seal part on the left and right sides of the bag is provided. The folding line of the bag is provided in the horizontal direction so that the middle part is connected to the upper and lower middle part, and the overlapping part when the bag is folded back by the folding line of the seal part on both sides at the same distance above and below the folding line In addition, a flexible packaging bag with a reseal function is provided with a slit having a tip that is a hook-shaped convex portion and a hole that can be engaged with the hook-shaped convex portion.

  The invention according to claim 2 of the present invention is a laminated film bag formed by heat-sealing the peripheral edge portion in a bag shape, and is provided below the upper seal portion for heat-sealing the upper edge portion of the bag. The opening means for cutting off the upper seal part to provide a take-out port for the contents is provided in the lateral direction, and the region below the position where the opening means of the side seal part on the left and right sides of the bag is provided. A first fold line connecting the upper portions and a second fold line connecting the intermediate portions are respectively provided in the lateral direction at the positions of the upper portion and the intermediate portion, and seal portions on both sides of the first fold line; The tip is saddle-shaped so that when the bag is folded back at the folding line, the seals on both sides of the lower side of the second folding line at a distance equal to the distance between the first and second folding lines overlap each other. Slit with a shape that becomes the convex part of this and this ridge-shaped convex part After the bag is opened by the opening means, the upper part is folded back to one side by the first folding line, and the folded part is also folded by the second folding line. When it is folded back so as to be wound in the direction, a slit in a shape where the tip becomes a bowl-shaped convex part at the lower left and right ends of the folded part overlaps with a hole part that can be engaged with this bowl-shaped convex part, A soft wrapping bag with a reseal function, wherein a folded portion is locked by engaging an overlapping hook-shaped convex portion with an engageable hole portion.

The engageable hole may be further provided above the first fold line.
In this case, when the upper part of the first folding line is folded back to one side, the vertical two rows of holes overlap each other so that the engagement by inserting the hook-shaped convex portion is more reliable. The effect of becoming something can be expected.
In the following description, for the sake of simplification, an example only when the number of holes is the minimum will be mainly described.

  In the flexible packaging bag with a resealing function of the present invention, the form of the bag is not particularly limited, but in order to further improve the opening of the contents outlet and the resealability after opening, the bag It is preferable that there is no step in the overlap of the laminated film of the bag at the part where the opening means or folding line is provided. For this purpose, in addition to a three-side seal type or four-side seal type bag, a standing pouch type bag, etc. More preferably.

  As the opening means for opening the take-out port, for example, an opening instruction line by printing or the like is provided, and the part is cut off with a knife such as a bag, and (a) a heat seal around the bag (B) A tearable film, for example, a uniaxially stretched film for easy opening in a certain direction when opening the bag A means for tearing the laminated film into a bag so that the tear direction coincides with that of the bag, and (c) a half cut line is provided on the laminated film of the bag by laser light irradiation. (D) A narrow and small scar group is provided at the end of the bag by a mechanical method so that it can be easily torn from the scratch group. There are easy-open means, such means may be used each of these opening means selected or combined appropriately.

The opening instruction line may be displayed by anything such as a character, a symbol, etc. in addition to a line such as a dotted line, a broken line, and a solid line, and can be easily provided by printing or the like.
In general, a single-letter or V-shaped notch is frequently used as the notch, but the shape thereof is not limited and may be a shape having a pointed portion in the tearing direction.

The half-cut line may be a continuous line-shaped half-cut line or an intermittent half-cut line such as a perforation.
Such a half-cut line may be one, but assuming that the tearing direction is deviated, a plurality of half-cut lines such as one each on each side of the center half-cut line, or two each of the half-cut lines, or It is possible to provide a shape that converges on the center half-cut line, or a combination of a plurality of parallel half-cut lines and an oblique half-cut line that intersects the oblique direction.

Various means as described above may be used as the opening means, but it is preferable to provide an opening instruction line at least at the opening position, so that the opening position of the bag can be clearly indicated, so that the opening position is set. It is hard to make mistakes.
In addition, by using easy-opening means such as notch, half-cut line, and uniaxially stretched film in combination with the opening instruction line, it can be easily torn and opened by hand without using tools such as scissors. become.

The folding line of the re-sealable flexible packaging bag of the present invention described above may be only a folding instruction line by printing, but in addition to this, by providing an easy folding line by pushing a muscle or the like, it can be more easily arranged at an appropriate position. Can be resealed.
In addition, the locking portion is for enabling the content outlet to be closed by folding the fold line after opening to be held in a closed state, for example, from the outside of the side seal portion. It can be provided with a locking part piece having an insertion part formed of a hook-shaped cut line (slit) formed inward and a locking means including a hole part that can lock the inserted insertion part.
The shape of the locking portion specifically mentioned in the following description is an example, and the shape and mechanism of the locking means are not particularly limited as long as the above object can be achieved.

According to the flexible packaging bag with a reseal function according to claim 1 of the present invention, in the laminated film bag formed by heat-sealing the peripheral edge portion in a bag shape, the upper edge portion of the bag is heat-sealed. An opening means for cutting out the upper seal portion to provide a content outlet is provided in the lateral direction below the upper seal portion, and the opening means for the side seal portions on the left and right sides of the bag are provided. The folding line of the bag is provided in the lateral direction so as to connect the intermediate parts to the upper and lower intermediate parts of the lower region of the position, and the folding lines of the seal parts on both sides at equal distances above and below the folding line The structure of the laminated film of the bag is formed by providing a slit having a shape in which the tip becomes a hook-shaped convex portion and a hole portion engageable with the hook-shaped convex portion at a position where they overlap each other when the bag is folded back. In addition to sealing performance, Yer resistance, so can be provided with excellent performance required for a bag like light-shielding safely with sealable packaging contents, it is possible to improve the storage stability of the contents.
By making the seal width of the side seal portion provided with a slit having a shape having a hook-shaped convex portion at the tip end wide only in the vicinity of the slit, it is possible to prevent unexpected cutting during operation.

Further, when taking out the contents sealed in the bag, since the opening means for providing a takeout port is provided in the lateral direction below the upper seal portion, the upper seal portion can be easily cut off at the correct position. Thus, the take-out opening can be opened, and the required amount of contents can be taken out easily.
The length of the take-out port may be the full width of the packaging bag, but it can also be set to an appropriate length according to the state of the contents and the amount taken out once. In this case, the extraction port is made only a part of the upper part by making the shape of the upper seal part not a straight line but a deformed region so that the opening means corresponding to the extraction port to be opened has an appropriate length. That's fine.

In addition, after removing the necessary amount of contents, when the upper part of the bag is folded back by a fold line, there are provided locking portions that can be engaged with each other so that the upper part of the opened bag is folded. By folding back to one side with a line and engaging the overlapping locking portions at the edge portions on both sides, the opened take-out port is held closed, and the bag can be resealed.
The bag re-sealing means as described above does not use a separate closing member such as a chuck tape, and can be provided only by punching the locking portion. It can be suitably used as a suitable resealing means.

According to the soft-packaging bag with a reseal function according to claim 2, the upper portions of the side seal portions on the left and right sides of the bag are located at the upper and middle positions of the lower region where the opening means is provided. A first fold line connecting the intermediate portions and a second fold line connecting the intermediate portions are respectively provided in the lateral direction, and seal portions on both sides of the first fold line and the lower side of the second fold line The slits on the both sides of the seal part at the same distance as the distance between the first and second fold lines and the slits with the tips of the ridges at the positions where they overlap each other when the bag is folded back at the fold lines, A hole that can be engaged with the hook-shaped convex portion is provided, and after the bag is opened by the opening means, the upper portion is folded back to one side by the first folding line, and the folded portion is When folded back in the same direction at the fold line of 2 A slit having a hook-shaped convex portion at the lower end on both the left and right sides of the looped portion overlaps with a hole that can be engaged with the hook-shaped convex portion in the front and rear, and is engaged with the overlapping hook-shaped convex portion. In addition to the above-described effect of the flexible packaging bag with a reseal function according to claim 1, the opening of the opened bag is closed by engaging the mating hole portion and locking the folded portion. However, since it is performed at the two-stage folded portion folded back so as to be wound, the takeout port can be resealed more reliably.
When the engageable hole portion is further provided above the first fold line, the opening of the opened bag can be more reliably closed.

  In this case as well, the bag resealing means does not use a separate closing member such as a chuck tape, and can be provided only by punching the locking portion. It can be suitably used as a resealing means.

The schematic front view which shows an example of a structure of the flexible packaging bag with a reseal function of this invention The schematic front view which shows another example of a structure of the flexible packaging bag with a reseal function of this invention The schematic front view which shows another example of a structure of the flexible packaging bag with a reseal function of this invention The schematic front view of the principal part which shows an example of the reseal state of the flexible packaging bag with a reseal function of this invention The schematic front view of the principal part which shows another example of the resealed state of the flexible packaging bag with a reseal function of this invention Typical example of hole shape Typical example of hole and locking piece pattern

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic front view showing an example (flat pouch) of a flexible packaging bag with a reseal function of the present invention.
FIG. 2 is a schematic front view showing another example (standing pouch) of the soft packaging bag with a reseal function of the present invention.
FIG. 3 is a schematic front view showing another example of the configuration of the flexible packaging bag with a reseal function of the present invention (when the take-out port is small).
FIG. 4 is a main part for explaining the resealed state when the bag is resealed by using the fold line and the locking part after opening the flexible packaging bag with the reseal function having the configuration shown in FIG. It is a schematic front view.
FIG. 5 illustrates the resealed state when the bag is resealed using the folding line and the locking portion after the flexible packaging bag with the reseal function having the configuration shown in FIGS. 2 and 3 is opened. It is a model front view of the principal part to do.
6 and 7 are schematic views showing examples of the shape of the engaging portions provided on the seal portions on the left and right sides of the upper portion of the flexible packaging bag with a reseal function of the present invention.

  The flexible packaging bag (100) with a reseal function shown in FIG. 1 is constructed by applying a four-side seal type bag, and the ends of the front and rear wall films (1) and (1 ') in the upper, lower, left and right sides. In the bag formed by heat-sealing the edge portion with the top seal portion (5), the bottom seal portion (4), the left side seal portion (2a), and the right side seal portion (2b), As the opening means for cutting the upper seal part (5) below the upper seal part (5) to provide a content outlet, the horizontal cut line (opening instruction line) (9) and both ends thereof Provided with notches (10a) and (10b) in the lower and upper intermediate portions of the region below the position where the side seal portions (2a) and (2b) are provided with the tear lines (9). The fold line (14) of the bag is provided in the lateral direction so as to tie each other, and the fold line (14) The side seal portions (2a) and (2b) on both sides of the same distance above and below are provided with locking portions that overlap each other and can be locked when the upper portion of the bag is folded at the folding line (14). Is.

The locking portion includes a locking piece (13b) formed by a hole (11a) and a slit (cut line) (11b) formed in the right side seal portion (2a), and a left side seal. It comprises a hole (11c) formed in the portion (2b) and a locking piece (13d) formed by a slit (cut line) (11d).
In this case, the example of the latching | locking part comprised by the rectangular hole and the hook-shaped latching piece convex toward the inner side was shown.

In this case, the upper seal portion (5) is used as a filling port for the contents, so that it is an unsealed opening before filling the contents, and is heat-sealed and sealed after filling the contents. is there.
In addition, the bottom of the bag can be used for the filling port of the contents. In this case, the bottom seal portion (4) is an unsealed opening before filling the contents, and heat sealing is performed after filling the contents. And seal it.

The flexible packaging bag (200) with a reseal function shown in FIG. 2 is configured by applying a standing pouch type bag, and in the configuration of the flexible packaging bag (100) with a reseal function shown in FIG. The bottom portion of the bag has a gusset portion (8) formed by folding the bottom film inward and inserting the bottom film fold portion (6) between the lower portions of the front and rear wall film (1), (1 '). A semicircular bottom film cutout (7a), (7b) is provided in the vicinity of the lower ends of both sides of the bottom film formed in the form and folded inward, and the gusset part (8) is formed from both sides. It is formed by heat-sealing with a bottom seal portion (4) of a ship bottom shape that is concave in a curved line shape toward the center portion.
In this case as well, the upper seal portion (5) is used as a filling port for the contents in this case, so that it is an unsealed opening before filling the contents, and is heat sealed after filling the contents. It is.

  Furthermore, the soft-packaging bag with reseal function (200) shown in FIG. 2 reseals the opening of the opened contents in the configuration of the soft-packaging bag with reseal function (100) shown in FIG. One fold line of the bag used at the time is added, and the second fold line (14b) is at the same position as the fold line (14) of the flexible packaging bag (100) with the reseal function shown in FIG. 1 except that the first fold line (14a) is provided so as to connect substantially the middle portions of the upper and lower side seal portions in the vertical direction (see FIG. 1). 100).

The flexible packaging bag (201) with the reseal function shown in FIG. 3 is configured by applying a standing pouch type bag in the same manner as the flexible packaging bag (200) shown in FIG. In the structure of the flexible packaging bag (100) with a reseal function, the bottom film is folded back inwardly between the lower portions of the front and rear wall films (1) and (1 '), and the bottom film folded section ( 6) It is formed in a form having a gusset portion (8) inserted up to, and semi-circular bottom film cutout portions (7a) and (7b) are provided in the vicinity of both lower ends of the bottom film folded inside. In this case, the gusset portion (8) is formed by heat-sealing with a bottom-shaped bottom seal portion (4) that is concave in a curved line shape from the both sides to the center portion.
In this case, the upper seal portion (5) is shorter than the case of FIG. 2 in terms of the length of the portion used for the content outlet, and is unsealed before filling the content. After filling the contents, the region having the shape as shown in the figure is sealed by atypical heat sealing.

Further, the flexible packaging bag (201) with a reseal function shown in FIG. 3 is the same as the soft packaging bag (201) with a reseal function shown in FIG. , (13d) slits (cut lines) (11b), side seal portions (2a) in the vicinity of (11d), (2b) are wider than the width of the upper and lower side seal portions. Therefore, it is possible to prevent unexpected disconnection.

FIG. 4 shows a resealed state when the bag is resealed using the folding line and the locking portion after opening the flexible packaging bag (100) with the reseal function having the configuration shown in FIG. It is a front view of the principal part explaining.
That is, as shown in FIG. 1, by constructing the flexible packaging bag (100) with a reseal function, the upper seal portion (5) of the bag can be moved from the notch (10a) along the cut line (9), for example. Cut out and open the content outlet, and after removing a portion of the filled contents, re-seal the opened outlet, flatten the open outlet, As shown in FIG. 4, the upper and lower side seal portions (2a) and (2b) on both sides of the fold line (14) are equally spaced by folding the upper portion of the bag forward and downward at the fold line (14) of the bag. Since the hole (11a) and the locking piece (13b), and the hole (11c) and the locking piece (13d) provided in the front and rear overlap each other, the locking piece (13b) is attached to the hole (11a). Insert the locking piece (13d) into the hole (11c) It by each is engaged upper portion of the bag folded engaged, it is possible to re-seal the opening of the bag.

  FIG. 5 shows that the flexible packaging bags (200) and (201) with the reseal function configured as shown in FIG. 2 and FIG. 3 are opened, and then the bags are resealed using the folding lines and the locking portions. It is a front view of the principal part explaining the resealed state at the time.

  That is, as shown in FIG. 2, the soft-packaging bag with a reseal function (200) or the soft-packaging bag with a reseal function (201) as shown in FIG. ), For example, from the notch (10a) along the cut line (9), the content outlet is opened, a part of the filled content is taken out, and then the opened outlet is opened again. When sealing, the opening is further closed so that the upper portion of the bag is folded back to the front and lower at the first fold line (14a), and the upper portion of the folded bag is further wound. As shown in FIG. 4, the first fold line (14a) is positioned at the lower end of the fold portion, and the fold line (14b) is formed on both sides of the fold line (14b). Side seal part (2a), (2b Since the hole (11a) and the locking piece (13b), and the hole (11c) and the locking piece (13d), which are provided at equal distances above and below, overlap each other, the locking piece (13b) By inserting into the hole (11a) and inserting the locking piece (13d) into the hole (11c), the upper portions of the bags that are engaged and folded in two stages are locked, and the opening of the bag is opened. It can be resealed more reliably.

  The shape of the locking piece and the hole provided in the side seal portions on the left and right sides of the upper part of the flexible packaging bag with a reseal function of the present invention is not limited to the shape described in the figure, and is inserted into the hole and locked. Any shape that can be combined is acceptable. Typical examples of some typical examples are shown in FIGS. 6 and 7 below.

6 and 7 are schematic views showing examples of shapes of the locking piece and the hole.
The dimensions and shapes of the locking pieces and the holes on both the left and right sides do not necessarily have to be symmetrical, but they are usually considered to be basically symmetrical because of their ease of manufacturing and handling. The example of only one side is displayed.
By appropriate combination of such shapes, the upper part of the bag can be locked in a stable state, and the opening for taking out the opened contents can be surely resealed.
Of course, shapes other than those illustrated can also be used for the flexible packaging bag with a reseal function of the present invention.

  As a film used for the flexible packaging bag with a resealable function of the present invention, a laminated film mainly composed of plastic is used. In a simple structure, a laminated film having a structure in which a sealant layer is laminated on a base film layer is used. It is done.

Depending on the contents filled in the bag, the handling conditions after filling the contents, or the required performance such as water vapor and other gas barrier properties, light shielding properties, various mechanical strengths and the like, For example, a laminated film having a structure in which a water vapor or other gas barrier layer, a light shielding layer, a strength improving layer, or the like is laminated as an intermediate layer can be used between the sealant layer and the like.
The above base film layer, water vapor and other gas barrier layers, light shielding layers, intermediate layers such as strength improving layers, sealant layers, etc. may be formed as a single layer, but are formed by laminating a plurality of layers. May be.

  The base film layer used in the flexible packaging bag with a reseal function of the present invention includes a biaxially stretched film of polyester resin such as polyethylene terephthalate resin and polyethylene naphthalate resin, as well as nylon 6 resin, nylon 66 resin, MXD6 (polymer A biaxially stretched film of a polyamide resin such as a taxylylene adipamide resin) or a biaxially stretched polypropylene resin film can be suitably used.

Examples of the gas barrier layer used in the flexible packaging bag with a resealable function of the present invention include resin films such as saponified ethylene / vinyl acetate copolymer (EVOH) resin, polyvinylidene chloride (PVDC) resin, and polyacrylonitrile (PAN) resin. In addition, a biaxially stretched nylon film (ON film), a biaxially stretched polyethylene terephthalate resin film (PET film) provided with a deposited layer of aluminum foil or silica, alumina, aluminum, etc., and a coating layer of PVDC resin, A biaxially stretched polypropylene resin film (OPP film) or the like can be used.
Among these, since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer.

  As the strength improving layer, any of the above base films may be additionally laminated as appropriate, and a biaxially stretched high-density polyethylene film or the like may also be laminated as a moisture-proof layer.

In addition, an easily tearable uniaxially stretched polypropylene film, a uniaxially stretched high-density polyethylene, an easily tearable biaxially stretched polyester film, and the like are laminated on the intermediate layer so that the stretch direction coincides with the tear direction when the bag is opened. Thereby, it is possible to facilitate tearing and to stabilize the directionality as the easy-opening means.
A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and an intermediate layer such as a gas barrier layer, a light shielding layer, or a strength improving layer.

  The sealant layer used in the flexible packaging bag with a resealable function of the present invention includes low density polyethylene (LDPE) resin, linear low density polyethylene (LLDPE) resin, ethylene / α-olefin copolymer resin, ethylene / acetic acid. A vinyl copolymer resin, an ethylene / acrylic acid copolymer resin, an ethylene / acrylic acid ester copolymer resin, an ionomer resin, a polypropylene resin, or a copolymer thereof can be used.

As a method for laminating the sealant layer, it is possible to adopt a method in which the resin is formed into a film and laminated by a dry lamination method or an extrusion lamination method, or a method in which the resin is extruded and laminated. it can.
However, in the case where the content easily penetrates into the sealant layer, it is preferable to laminate by the dry lamination method.

Next, the manufacturing method of the flexible packaging bag with a reseal function of this invention is demonstrated.
As described above, the flexible packaging bag with a reseal function of the present invention includes, for example, the upper seal portion cut out below the upper seal portion that heat seals the upper edge portion of the bag. An opening means for providing a take-out opening is provided in the lateral direction, and the intermediate parts are placed in the upper and lower intermediate parts of the region below the position where the opening means of the side seal parts on the left and right sides of the bag are provided. The folding line of the bag is provided in a lateral direction so as to tie, and when the bag is folded back by the folding line at the upper and lower side seal portions at the same distance above and below the folding line, there are tips that overlap and engage each other. A slit having a shape that is a bowl-shaped convex part and a hole that can be engaged with a locking piece having the bowl-shaped convex part are provided.

  For this purpose, the bag type is such as a three-sided seal type or a four-sided seal type from the point of view of the opening of the contents outlet and the bendability of the fold line when the opened outlet is resealed. In addition to the flat pouch type, a bag of a standing pouch type or the like is more preferable.

Therefore, basically, using a bag making machine of the type adopted, a punching device for providing a notch for the opening means, a laser beam irradiation device for providing a half-cut line, and a wide sealing portion are provided. By appropriately adding a heat sealing device for this purpose, a punching device for providing a locking piece and a hole, etc., it can be easily manufactured using the bag making machine.
Hereinafter, the present invention will be described more specifically with reference to examples.

<Example 1>
Example 1 A flexible packaging bag (100) with a reseal function having the configuration shown in FIG. 1 (four-side seal type) is manufactured, and a bag is manufactured with the following dimensions using a laminated film having the following configuration. It was set as the soft packaging bag with a reseal function.

(1) Structure of laminated film for wall surface (1), (1 ′) Biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) (thickness 12 μm) / adhesive / easy tearable uniaxially stretched polypropylene film (thickness 20 μm) / Adhesive / Linear low density polyethylene film (hereinafter referred to as LLDPE film) (thickness 50 μm) (sealant layer).
The above-mentioned films were bonded together by a dry lamination method, and the adhesive between the films was a two-component curable polyurethane adhesive for dry lamination.

(2) External dimensions of flexible packaging bag with reseal function and dimensions of each part The external dimensions of the bag (100) are 160 mm in total width, 245 mm in total length, the seal width of the upper seal part (5) is 7 mm, and bottom seal The seal width of the portion (4) and the side seal portions (2a) and (2b) was 6 mm each.
Under the upper seal portion (5), a cut line (9) by printing was provided in the lateral direction as an opening means with an interval of 4 mm, and notches (10a) and (10b) were provided at both ends thereof.

  Under the cut line (9), a folding line (14) of the bag is provided by printing in the lateral direction with a spacing of 45 mm, and in the region of the left and right side seal portions (2a), (2b) As shown in the figure, the holes (11a) and (11c) having a shape as shown in the figure are opened above the fold line (14) with a gap of 20 mm below the fold line (14). A bag was prepared by providing locking pieces (13b) and (13d) with slits (11b) and (11d) having various shapes.

<Example 2>
Example 2 A flexible packaging bag (200) with a reseal function having the configuration shown in FIG. 2 (standing pouch type) is manufactured, and a bag is manufactured with the following dimensions using a laminated film having the following configuration. It was set as the soft packaging bag with a reseal function.

(1) Structure of laminated film for wall surface (1), (1 ′) PET film (thickness 12 μm) / adhesive / aluminum deposition (deposition thickness 400 mm) PET film (hereinafter referred to as aluminum deposition PET film) (thickness 12 μm) / adhesion Agent / LLDPE film (thickness 50 μm) (sealant layer).

(2) Configuration of laminated film for bottom surface PET film (thickness 12 μm) / adhesive / aluminum-deposited PET film (thickness 12 μm) / adhesive / LLDPE film (thickness 40 μm).
The above-mentioned films were bonded together by a dry lamination method, and the adhesive between the films was a two-component curable polyurethane adhesive for dry lamination.

(3) External dimensions of flexible packaging bag with reseal function and dimensions of each part The external dimensions of the bag were 160 mm in total width and 230 mm in total length, and the folding length of the bottom gusset part (8) was 38 mm.

  In addition, the dimensions of the body part and the upper part of the bag other than the above are used when resealing the take-out port of the contents opened in the configuration of the flexible packaging bag with a reseal function (100) of the first embodiment. In addition to the fold line (14a), the fold line (14b) is provided at the same position as the fold line (14) of the flexible packaging bag (100) with the reseal function shown in FIG. The flexible folding bag (100) with the reseal function shown in FIG. 1 is provided except that an additional folding line (14a) is provided so as to connect substantially the middle portions of the upper and lower side seal portions in the vertical direction. It is formed and configured in the same way

  Furthermore, as for the means for opening the bag (200), in addition to the cut line (9) by printing and the notches (10a) and (10b) at both ends, a half cut by laser light irradiation along the cut line (9) A flexible packaging bag with a reseal function of Example 2 was prepared in the same manner as in Example 1 except that a wire was provided.

<Example 3>
A flexible packaging bag (201) with a reseal function having the configuration shown in FIG. 3 (standing pouch type with a narrow opening) is prepared, and the bag is formed with the following dimensions using a laminated film having the following configuration. The soft packaging bag with the reseal function of Example 3 was prepared.

(1) Structure of laminated film for wall surface (1), (1 ′) PET film (thickness 12 μm) / adhesive / aluminum deposition (deposition thickness 400 mm) PET film (hereinafter referred to as aluminum deposition PET film) (thickness 12 μm) / adhesion Agent / LLDPE film (thickness 50 μm) (sealant layer).

(2) Configuration of laminated film for bottom surface PET film (thickness 12 μm) / adhesive / aluminum-deposited PET film (thickness 12 μm) / adhesive / LLDPE film (thickness 40 μm).
The above-mentioned films were bonded together by a dry lamination method, and the adhesive between the films was a two-component curable polyurethane adhesive for dry lamination.

(3) External dimensions of flexible packaging bag with reseal function and dimensions of each part The external dimensions of the bag were 130 mm in overall width, 195 mm in total length, and the folding length of the bottom gusset part (8) was 38 mm.
Also, the upper seal portion is 12 mm in width and the outlet port width is 46 mm, so that it is formed by a variant heat seal as shown in FIG. did.

  In addition, the dimensions of the body part and the upper part of the bag other than the above are used when resealing the take-out port of the contents opened in the configuration of the flexible packaging bag with a reseal function (100) of the first embodiment. In addition to the fold line (14a), the fold line (14b) is provided at the same position as the fold line (14) of the flexible packaging bag (100) with the reseal function shown in FIG. The flexible folding bag (100) with the reseal function shown in FIG. 1 is provided except that an additional folding line (14a) is provided so as to connect substantially the middle portions of the upper and lower side seal portions in the vertical direction. It is formed and configured in the same way

  Furthermore, as for the means for opening the bag (201), in addition to the cut line (9) by printing and the notch (10a) at the end, a half cut line by laser light irradiation is provided along the cut line (9). Other than that, the soft packaging bag with a reseal function of Example 3 which was manufactured in the same manner as Example 1 and has a small take-out port was used.

In order to evaluate the resealability of the flexible packaging bags with a reseal function of Examples 1 to 3 manufactured as described above, tests were performed as follows.
After filling the appropriate amount of confectionery as the contents from the opened upper seal part (5) before sealing the respective soft packaging bags with a reseal function of Examples 1, 2, and 3, the upper seal part (5) is heated. Sealed and sealed the bag.

The packaging bodies made of the soft packaging bag with the reseal function of Examples 1, 2, and 3 produced as described above were all excellent in sealing performance.
In particular, since the packaging body of the soft packaging bag with a reseal function in Examples 2 and 3 is a standing pouch-type bag, it has a stable self-standing property, has a good appearance, and is excellent in actual handling. .

Next, when the upper seal portion (5) of each package is torn by hand along the cut line (9) starting from one notch (10a) below, the flexible package with the reseal function of Example 1 The package body by a bag is obtained by laminating an easily tearable uniaxially stretched polypropylene film on the intermediate layer of the laminated film for wall surface (1), (1 ′), and the flexible packaging with a reseal function of Examples 2 and 3 Since the package with a bag is provided with a half cut line by laser light irradiation in addition to a cut line by printing at the part of the cut line (9), the tearing direction is hardly deviated from the cut line (9). It was also possible to open the contents outlet by tearing it cleanly along the tear line (9).
In particular, the packaging body of the soft packaging bag with the reseal function of Example 3 was easy to take out little by little because the take-out port was narrow.

  After a part of the contents is taken out from the take-out opening of the opened contents, the opening is closed flat, and the packaging body of Example 1 has a bag at the fold line (14) as shown in FIG. The top of the upper part is folded back to the front, the overlapping locking piece (13b) and the hole (11a), and the overlapping locking piece (13d) and the convex part of the corresponding locking piece of the hole (11c) It was possible to reliably reseal the opening for taking out the opened contents by inserting it into the hole.

Further, as shown in FIG. 5, the packaging bodies of Example 2 and Example 3 were folded at the folding line (14b) after the upper portion of the bag was folded back at the folding line (14a). As shown in FIG. 5, the overlapping engaging pieces (13b) and the hole (11a) and the overlapping engaging pieces (13d) and the corresponding protrusions of the engaging portions (11c) It was possible to re-seal more reliably without exposing the opening for taking out the opened contents by inserting it into the hole.
Furthermore, in the package of Example 3, since the opening formed by the tear line (9) is small, there is little exposure, and there is no need to worry about spilling the contents after resealing. It was possible.

  Thus, according to the flexible packaging with a resealing function of the present invention, there is no need for a resealing member separate from the bag or its attachment device, and the manufacturing process is the same as that for ordinary bag making. It is possible to make a bag, and a re-sealing means can be easily provided at the same time as the bag making, and the opening portion of the opened bag can be easily resealed by a simple operation by the resealing means. We were able to provide a flexible packaging bag that could be sealed.

The resealability during use, especially when the contents are solid and may be adequately sealed, is because the plastic part of the material increases in the method of using a bag and another plastic or other parts from the viewpoint of environmental problems. Is also not desirable.
Since the present invention can be realized only by changing the structure of an existing pouch, it can contribute to ensuring convenience for consumers while considering cost and environment.

The resealable bag of the present invention can safely seal and wrap the contents, and when using the filled contents, the contents outlet is opened and the contents are taken out little by little. The take-out opening that is opened each time can be used as a bag that can be easily resealed, and there are no particular restrictions on the contents to be filled and the use.
It can be widely used as a soft packaging pouch having a reclosing function for the contents of food, confectionery, daily miscellaneous goods, pharmaceuticals (ships, etc.).

1 ... Wall film (laminated film)
1 '... Wall film (laminated film)
2a ... side seal part 2b ... side seal part 4 ... bottom seal part 5 ... top seal part 6 ... bottom film turn-back part 7a ... bottom film notch part 7b ... bottom film notch part 8 ... gusset part 9 ... tear line (Opening instruction line)
10a ... Notch 10b ... Notch 11a ... Hole 11c ... Hole 11b ... Slit (cut line)
11d ... Slit (cut line)
13b ... locking piece 13d ... locking piece 14 ... fold line 14a ... first fold line 14b ... second fold line 100 ... soft packaging bag 200 with reseal function ... soft packaging bag 201 with reseal function ... reseal Soft packaging bag with function

Claims (2)

In a laminated film bag formed by heat-sealing the peripheral edge in a bag shape,
On the lower side of the upper seal portion where the upper edge of the bag is heat-sealed, an opening means for cutting out the upper seal portion and providing a content outlet is provided in the lateral direction,
The folding line of the bag is provided in the lateral direction so as to connect the intermediate parts to the upper and lower intermediate parts of the lower region of the position where the opening means of the side seal parts on the left and right sides of the bag are provided. The slits on both sides of the seal portion at equal distances above and below can be engaged with the saddle-shaped convex portion at the position where the bag overlaps when the bag is folded back at the folding line and the saddle-shaped convex portion. A flexible packaging bag with a reseal function, wherein a hole is provided. In a laminated film bag formed by heat-sealing the peripheral edge in a bag shape,
On the lower side of the upper seal part for heat-sealing the upper edge of the bag, an opening means for cutting out the upper seal part and providing a content outlet is provided in the lateral direction,
A first fold line connecting the upper parts to the upper part of the lower region of the position where the opening means of the side seal part on the left and right sides of the bag is provided, and a second part connecting the intermediate parts to each other. Fold lines are provided in the horizontal direction,
Bags at the fold lines of the seal portions on both sides of the first fold line and the seal portions on both sides below the second fold line and at a distance equal to the distance between the first and second fold lines. After the bag is opened by the opening means, a slit having a shape in which the tip becomes a bowl-shaped projection and a hole engageable with the bowl-shaped projection is provided at a position where they overlap each other when folded. When the first folding line is folded back so that the upper part is folded in one direction, and the folded part is folded so as to be wound in the same direction by the second folding line, the tips are saddle-shaped at the lower left and right sides of the folded part. The slit that has the shape of the convex part and the hole that can be engaged with the saddle-shaped convex part overlap each other, and the folded part is engaged by engaging the overlapping convex part with the saddle-shaped convex part. Flexible packaging with resealing feature characterized by locking .

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