JP2019156497A - Packaging bag - Google Patents

Abstract

To provide a packaging bag which can be easily cut to open along a half-cut line from an easily unsealed/processed part.SOLUTION: A packaging bag 10 comprises: sealed parts 11; a storage part 18; and unsealing means 20. The unsealing means 20 has: easily unsealed/processed parts 24; a first half-cut line 21 which crosses a space between the easily unsealed/processed parts 24 of a laminated film 13; and second and third half-cut lines 22 and 23 which are formed to bulge toward an upper end part 17 and a lower end part 16 respectively relative to the first half-cut line 21, between the easily unsealed/processed parts 24a of a laminated film 12. The easily unsealed/processed part 24 is made by removing layers at further outer surface sides than aluminum layers from the pair of laminated films 12 and 13 so that the aluminum layers are exposed onto a surface of the packaging bag 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag.

  2. Description of the Related Art A packaging bag that seals and preserves a packaged item such as food is known. The packaging bag is devised to facilitate opening by providing a notch or the like at the side end. In addition, there is a packaging bag in which resealing means such as a synthetic resin fastener is attached in the vicinity of the opening so that resealing is possible even after opening. By providing the re-sealing means on the packaging bag, the packaged item can be repeatedly sealed and stored even when the packaged item is not consumed all at once but is consumed several times.

  As a method for opening such a packaging bag, a method of opening a laminated film by using an easy opening portion such as a U-shaped, V-shaped or I-shaped notch provided in a seal portion at a side end is generally used. Is. However, when opening a packaging bag, after starting an opening from an easy opening process part, a tear may bend and a resealing means may be cut | disconnected. In order to avoid such a situation, a device is known in which a half-cut line serving as a cut-off track is placed in the vicinity of the easy-opening processing portion so that the cut end is not bent in an unexpected direction.

  By the way, the above-described packaging bag is formed by partially bonding a pair of laminated films in which a plurality of films of different materials are laminated. If the pair of laminated films are simply cut in a straight line when the packaging bag is opened, there is a problem that the laminated film is difficult to grasp and difficult to open when opening or resealing from a resealed state. In order to solve such a problem, a technique has been proposed in which the tracks of the half-cut lines are made different on the front and back surfaces of the packaging bag so that the laminated film can be easily gripped after opening (for example, see Patent Documents 1 and 2). ).

JP 2013-209159 A JP 2013-209160 A

  As described above, the conventional packaging bag is opened by using an easy opening portion such as a U-shaped, V-shaped or I-shaped notch. However, even if a half-cut line is formed in the laminated film as in Patent Documents 1 and 2, the cut-off path is shifted from the expected trajectory, and the cut-out is formed obliquely, and a sufficiently-sized opening cannot be formed. If there is a resealing means, it may be damaged.

  This invention is made | formed in view of the said situation, and it aims at providing the packaging bag which is easy to open along a half cut line from an easy opening process part.

  As a result of studying a mode of a new easy-opening processing portion that replaces a conventional U-shaped, V-shaped, or I-shaped notch, the present inventors have been useful for opening a packaging bag along a half-cut line. As a result, the present invention has been completed.

The packaging bag according to the present invention comprises the following invention specific items.
The packaging bag according to the present invention includes a seal portion formed by laminating the peripheral edges of a pair of laminated films, a storage portion that encloses an article to be packaged in a non-seal portion inside the seal portion, a pair of side end portions, and a space therebetween. And an opening means for cutting the container so as to cross the container.
The opening means includes an easy opening portion provided on each of the pair of side end portions, a first half-cut line provided on one of the pair of laminated films so as to cross between the easy opening portions, The other half of the pair of laminated films has a second half-cut line provided so as to swell toward the lower end part and a third half-cut line provided so as to swell toward the upper end part between the easy-open processing parts.
The pair of laminated films have at least a base material layer, an aluminum layer, and a sealant layer in this order from the outer surface to the inner surface of the packaging bag.
The easy-open processing part is formed by removing the outer layer from the pair of laminated films so that the aluminum layer is exposed on the outer surface of the packaging bag.

  According to the packaging bag which concerns on this invention, the effect that it is easy to open along a half cut line from an easy-open process part is show | played. The main cause is not necessarily clear, but the easy-open processing portion has the above-described configuration, that is, the layers on the outer side of the aluminum layer are removed from the pair of laminated films so that the aluminum layer is exposed on the outer surface, in other words, For example, at least an aluminum layer and a sealant layer remain in the easy-opening portion, so that even if the user opens the packaging bag vigorously, these layers in the easy-opening portion serve as a cushion, reducing the momentum. Is done. Accordingly, the inventors infer that the trajectory of the cut easily shifts from the easy-opening portion to the half-cut line, and then the cut is formed along the half-cut line.

  The plastic film is difficult to tear with a finger unless a U-shaped, V-shaped or I-shaped notch or scar group is provided, whereas the aluminum layer is stronger than the plastic film. Since it has rigidity, it has the property of being easy to tear. Even if the above-mentioned notch or scar group is not formed in the easy-opening portion where the aluminum layer is exposed as the outermost layer, a person can easily make a cut with a finger.

  In the packaging bag, it is preferable that an end point of the second half-cut line and an end point of the third half-cut line are located at the boundary between the easy-open processing portion and the seal portion. By adopting such a configuration, the cut formed in the easy-open processing part is further easily formed as it is along the second and third half cuts. In this case, the end point of the second half-cut line and the end point of the third half-cut line may coincide with each other or may be separated at the boundary between the easy-open processed part and the seal part.

  Examples of the shape of the easy-open processing portion include a triangular shape (V shape), a quadrangular shape (I shape in the case of an elongated quadrangular shape), a pentagonal shape, a semicircular shape, and a U shape. The easy-open process part is preferably formed by volatilizing and removing a layer on the outer side of the aluminum layer by laser irradiation in the process of manufacturing the packaging bag. Unlike the conventional U-shaped, V-shaped or I-shaped (especially U-shaped or V-shaped) notches, the easy-opening processed portion is formed by volatilizing and removing the easy-opening processing portion. There is an advantage that no film piece is generated.

  The unsealing means may have a plurality of second half cut lines and a plurality of third half cut lines. By adopting such a configuration, it is easy to open along any one of a plurality of second and third half-cut lines, regardless of the direction in which the force is applied to the easy-open processing portion during opening. In this case, the unsealing means includes a combination in which the end point of the second half-cut line and the end point of the third half-cut line coincide with each other at the boundary between the easy-open processed part and the seal part, and the end point of the second half-cut line. And the end point of the third half-cut line may be separated. The unsealing means may have a plurality of first half cut lines.

  The packaging bag may further include resealing means for resealing the housing part after opening by the unsealing means, closer to the housing part than the unsealing means.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging bag which is easy to cut along the half cut line from an easy opening process part is provided.

It is a top view which shows typically the packaging bag which concerns on 1st Embodiment. It is a top view when the packaging bag shown in FIG. 1 is seen from the back surface. It is sectional drawing which shows typically an example of the laminated structure of a pair of laminated film, and the easy-open process part formed in the seal part. (A) is a top view which shows the state which opened the packaging bag of FIG. 1 along the 1st and 2nd half cut line, (b) is the 1st and 3rd half cut line of the packaging bag of FIG. It is a top view which shows the state cut open along. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag of FIG. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 2nd Embodiment. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 3rd Embodiment. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 4th Embodiment. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 5th Embodiment. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 6th Embodiment. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag which concerns on 7th Embodiment. (A)-(d) is a partial top view which shows typically the other example of the shape of an easy-open process part. (A)-(d) is a partial top view which shows typically the further another example of the shape of an easy-open process part.

  Embodiments of the present invention will be described below with reference to the drawings. However, the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted in some cases. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

<First Embodiment>
FIG. 1 is a plan view schematically showing the surface side of the packaging bag according to the first embodiment of the present invention. FIG. 2 is a plan view schematically showing the back side of the packaging bag. The packaging bag 10 includes a seal portion 11 formed by bonding the peripheral edges of a pair of substantially rectangular laminated films 12 and 13, and a storage portion 18 formed between the pair of laminated films 12 and 13 by the seal portion 11. . That is, the side end portion 14, the lower end portion 16, and the upper end portion 17 of the packaging bag 10 are sealed by the seal portion 11. The packaging bag 10 includes an accommodation portion 18 in which an article to be packaged such as a food product is accommodated in a non-sealing portion (sheet portion) 15 surrounded by the sealing portion 11. The container 18 encloses an object to be packaged such as food. In addition, you may seal the seal | sticker part 11 of the lower end part 16, after filling the to-be-packaged object in the accommodating part 18. FIG.

  The laminated films 12 and 13 are configured by laminating two or more film-like films. FIG. 3 is a cross-sectional view schematically showing an example of a laminated structure of the laminated films 12 and 13. As the laminated film 12, as shown in FIG. 3, a film having a laminated structure of sealant layer 12a / barrier layer 12b / base material layer 12c from the inner surface F1 side to the outer surface F2 side of the packaging bag 10 can be mentioned. Examples of the laminated film 13 include those having the same laminated structure as the laminated film 12, that is, the laminated structure of the sealant layer 13a / barrier layer 13b / base material layer 13c from the inner surface F1 side to the outer surface F2 side of the packaging bag 10. It is done.

  As a material constituting the sealant layers 12a and 13a, for example, a polyolefin-based resin is exemplified. More specifically, low density polyethylene resin, medium density polyethylene resin, linear low density polyethylene resin; ethylene-vinyl acetate copolymer, ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer, etc. Ethylene resin; blend resin of polyethylene and polybutene; polypropylene resin such as homopolypropylene resin, propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, and the like.

  Aluminum foil (aluminum layer) is mentioned as a material which comprises the barrier layers 12b and 13b. Aluminum foil has gas barrier properties, water vapor barrier properties, and the like. The barrier layers 12b and 13b are not limited to aluminum foil as long as the user can cut them with a finger. For example, an aluminum deposited film obtained by depositing aluminum on a resin film that can be cut with a finger to form an aluminum layer is used as the barrier layer. You may use as 12b and 13b.

  Examples of the material constituting the base material layers 12c and 13c include biaxially stretched films such as a biaxially stretched polyethylene terephthalate (PET) film, a biaxially stretched polypropylene (PP) film, and a biaxially stretched nylon film. In addition, the laminated structure of the laminated films 12 and 13 is not limited to the above-described embodiment, and layers of various materials can be used according to the type of the packaged object and the required airtightness level. In addition, the base material layer may be comprised by the several layer, for example, may be comprised by the biaxially stretched PET film and the biaxially stretched PP film. Further, an adhesive layer may be interposed between the layers constituting the laminated films 12 and 13 as necessary.

  The packaging bag 10 is provided on the upper end side of the non-seal part 15, on the side ends 14, 14 of the packaging bag 10, and on the lower side of the opening means 20 for opening and opening so as to cross between them. And a resealing means 30 for resealing the accommodating portion 18 after being opened by the opening means 20.

  The resealing means 30 can appropriately adopt a known structure that can be repeatedly opened and sealed. For example, it may be a synthetic resin fastener that can be repeatedly sealed by fitting a belt-like protrusion and a belt-like groove, or may be an adhesive seal.

  As shown in FIG. 2, the unsealing means 20 has a first half-cut line 21 that linearly crosses between the pair of side end portions 14, 14 on the surface of one (back side) laminated film 13. The first half-cut line extends from one easy-open processing portion 24 provided in the seal portion 11 to the other easy-open processing portion 24. Further, as shown in FIG. 1, the opening means 20 is formed on the surface of the other laminated film 12 (on the front surface side) and between the side end portions 14, 14 on the lower end portion 16 side (resealing means 30 side). A second half-cut line 22 formed so as to swell and a third half-cut formed so as to swell between the side end portions 14 and 14 on the side opposite to the second half-cut line 22 (upper end portion 17 side). Line 23. As shown in FIG. 1 or 2, when the packaging bag 10 is viewed from the front side or the back side, the second half-cut line 22 and the third half-cut line 23 are at least one of the first half-cut lines 21 of the laminated film 13. It is provided so that it may become a positional relationship which pinches | interposes a part.

  The second half-cut line 22 is provided so as to be convex downward in FIG. 1, and the third half-cut line 23 is provided so as to be convex upward in FIG. The second half-cut line 22 and the third half-cut line 23 are the same regardless of whether they are cut from the viewpoint of smoothing the opening, the viewpoint of smoothing the cut after the opening, and the left and right easy-opening processing parts 24. From the viewpoint of sharpness, it is preferable that the shape is bilaterally symmetric with respect to the center line that vertically cuts the packaging bag 10. From the same viewpoint, it is preferable that the second half-cut line 22 and the third half-cut line 23 are provided so as to be vertically symmetric with respect to a line segment connecting the end points P1 and P1. The shape of the second half-cut line 22 and the third half-cut line may be a parabola shape or a circular arc shape as shown in FIG. There may be.

  When the width of the packaging bag 10 is L, the gap between the second half-cut line 22 and the third half-cut line 23 may be 0.05 L to 0.3 L on the center line that vertically cuts the packaging bag 10. 0.1L to 0.2L.

  As shown in FIG. 1, when the packaging bag 10 is viewed from the front, the first half-cut line 21 is provided so as to cross the region surrounded by the second half-cut line 22 and the third half-cut line 23. Yes. As a result, even if the packaging bag 10 is cut open from either the left or right side end portion 14, or even when the upper end portion 17 is pulled toward the front side or pushed backward, the packaging bag 10 is opened. When 10 is opened by the unsealing means 20, the path for cutting the laminated film 12 and the laminated film 13 can be shifted. Thereby, the opening of the resealing means 30 can be facilitated after the slitting.

  FIG. 4A is a plan view showing a state in which the packaging bag 10 is cut open along the first half-cut line 21 and the second half-cut line 22. As shown in this figure, since the inner surface F1 of the laminated film 13 is exposed at the cut end 40 of the packaging bag 10, the upper end of the laminated film 13 can be easily grasped. As a result, the packaging bag 10 can be easily opened and resumed. FIG. 4B is a plan view showing a state in which the packaging bag 10 is cut open along the first half-cut line 21 and the third half-cut line 23. As shown in this figure, since the inner surface F1 of the laminated film 12 is exposed at the cut end 40 of the packaging bag 10, the upper end of the laminated film 12 can be easily grasped. As a result, the packaging bag 10 can be easily opened and resumed.

  FIG. 5 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10. The unsealing means 20 has an easy opening portion 24 at the side end portion 14 including the first half-cut line 21. The easy-open processing part 24 has an aluminum layer (barrier layers 12b, 13b or a part thereof) exposed on the outer surface of the packaging bag 10. A sealant layer is interposed between the barrier layer 12b and the barrier layer 13b, and the sealant layer is formed by fusing the sealant layers 12a and 13a by heat (see FIG. 3).

  The easy-open processing part 24 is formed by removing a layer on the outer surface side of the aluminum layer from the laminated films 12 and 13 so that the aluminum layer is exposed in the process of manufacturing the packaging bag 10. It is preferable that the easy-open processing portion 24 is formed by volatilizing and removing the outer layer side of the aluminum layer by laser irradiation. Unlike conventional U-shaped, V-shaped, or I-shaped (especially U-shaped or V-shaped) notches, laser volatilization is advantageous in that no film pieces are generated in the process of forming the easy-open processing portion 24. There is. Moreover, since the aluminum layer exposed to the easy-opening process part 24 is easy to visually recognize for a user, the printing for making the easy-opening process part 24 conspicuous does not necessarily need to be given to the base material layers 12c and 13c.

  The first half-cut line 21, the second half-cut line 22, and the third half-cut line 23 all converge at an end point P1 located at the boundary between the easy-open processing part 24 and the seal part 11 (FIG. 1, FIG. 2, 5). When opening the packaging bag 10, first, the layer including the aluminum layer in the easy-opening processing portion 24 is cut, and the cut reaches the boundary between the easy-opening processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut line 21, while the laminated film 12 is cut along the second half-cut line 22 or the third half-cut line 23. Since the end point P1 is the boundary between the easy-opening processing portion 24 and the seal portion 11 and is located at the position facing the end portion 24a of the easy-opening processing portion 24, the first opening is started from the end portion 24a of the easy-opening processing portion 24. The first half-cut line 21 and the second half-cut line 22 or the third half-cut line 23 can be easily reached.

Second Embodiment
FIG. 6 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10A according to the second embodiment of the present invention. The opening means 20 of the packaging bag 10A is different from the above-described opening means 20 (FIG. 5) of the packaging bag 10 in that the second half-cut line 22 and the third half-cut line 23 are shifted downward and upward, respectively. . As shown in FIG. 6, the first half-cut line 21 starts from the end point P1, whereas the second half-cut line 22 starts from the end point P2 located on the lower end 16 side of the end point P1, and the third half-cut line 21 starts. The cut line 23 starts from an end point P3 located on the upper end 17 side of the end point P1. That is, the second half-cut line 22 and the third half-cut line 23 reach the easy-open processing portion 24 while being separated from each other. The end points P1, P2, and P3 are all the boundaries between the easy-open processing portion 24 and the seal portion 11 and are located at positions facing the end portion 24a of the easy-open processing portion 24. FIG. 6 shows only one side end 14 side, but the other side end 14 has the same configuration.

  When opening the packaging bag 10 </ b> A, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy-open processing portion 24, and the cut reaches the boundary between the easy-open processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut line 21, while the laminated film 12 is cut along the second half-cut line 22 or the third half-cut line 23. If the distance between the end point P1 and the end points P2 and P3 is about 1 to 4 mm, the first half-cut line 21 and the second half-cut line 22 or the third half-cut are formed from the end 24a of the easy-opening processed part 24. The line 23 can be easily reached.

<Third Embodiment>
FIG. 7 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10B according to the third embodiment of the present invention. The unsealing means 20 of the packaging bag 10B is different from the unsealing means 20 (FIG. 6) of the above-described packaging bag 10A in that the shape of the easy-opening processing portion 24 is a quadrangle (rectangle). That is, as shown in FIG. 7, the first half-cut line 21 starts from the end point P1, whereas the second half-cut line 22 starts from the end point P2 located on the lower end 16 side of the end point P1, The 3 half-cut line 23 starts from an end point P3 located on the upper end 17 side of the end point P1. That is, the second half-cut line 22 and the third half-cut line 23 reach the easy-open processing portion 24 while being separated from each other. The end points P1, P2, and P3 are all located at the boundary between the easy-opening processing portion 24 and the seal portion 11, and the end points P2 and P3 are located at the corners of the easy-opening processing portion 24 that has a rectangular shape. Further, the end points P1, P2, and P3 are all at positions facing the end portion 24a of the easy-open processing portion 24. FIG. 7 shows only one side end portion 14 side, but the other side end portion 14 side has the same configuration.

  When opening the packaging bag 10 </ b> B, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy-open processing portion 24, and the cut reaches the boundary between the easy-open processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut line 21, while the laminated film 12 is cut along the second half-cut line 22 or the third half-cut line 23. The distance between the end point P1 and the end points P2 and P3 is about 1 to 4 mm. By providing the start points (end points P2 and P3) of the half-cut lines 22 and 23 at the corners of the easy-open process part 24 having a square shape, the first half-cut line starts from the end part 24a of the easy-open process part 24. 21 and the second half-cut line 22 or the third half-cut line 23 can be easily reached.

<Fourth embodiment>
FIG. 8 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10C according to the fourth embodiment of the present invention. The opening means 20 of the packaging bag 10C is the above-mentioned in that the two first half-cut lines 21a and 21b are formed starting from the corners (end points P2 and P3) of the easy-opening processing portion 24 having a square shape. It differs from the opening means 20 (FIG. 7) of the packaging bag 10B. That is, as shown in FIG. 8, the first half-cut line 21a starts from the end point P2, and the first half-cut line 21b starts from the end point P3. The end points P2 and P3 are both positioned at the boundary between the easy-open processing portion 24 and the seal portion 11, and are positioned at the corners of the easy-open processing portion 24 that has a square shape. Further, the end points P2 and P3 are at positions facing the end portion 24a of the easy-open processing portion 24. 8 shows only one side end portion 14 side, the other side end portion 14 side has the same configuration.

  When opening the packaging bag 10 </ b> C, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy-open processing portion 24, and the cut reaches the boundary between the easy-open processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut line 21a or the first half-cut line 21b, while the laminated film 12 is cut along the second half-cut line 22 or the third half-cut line 23. It becomes. The second half-cut line 22 and the third half-cut line 23 reach the easy opening portion 24 while being separated from each other, and the interval between the end point P2 and the end point P3 may be about 2 to 8 mm. By providing the start points (end points P2, P3) of the half-cut lines 21a, 21b, 22, and 23 at the corners of the easy-opening portion 24 having a quadrangular shape, the cut-off starting from the end portion 24a of the easy-opening processing portion 24 is an end point. It is easy to reach P2 or the end point P3. After the cut reaches the end point P2 or the end point P3, the packaging bag 10C is opened along the first half-cut line 21a and the second half-cut line 22 or the first half-cut line 21b and the third half-cut line 23. The

<Fifth Embodiment>
FIG. 9 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10D according to the fifth embodiment of the present invention. The opening means 20 of the packaging bag 10D is different from the opening means 20 (FIG. 7) of the packaging bag 10B described above in that the first half-cut line 21 is branched in the middle. That is, as shown in FIG. 9, the first half-cut line 21 branches from the point P4 in the vicinity of the easy-open processing portion 24 to the first half-cut lines 21c and 21d, and the first half-cut line 21c reaches the end point P2. On the other hand, the first half-cut line 21d reaches the end point P3. When the width of the packaging bag 10 is L, the distance between the easy-open processing portion 24 and the point P4 may be about 0.05L to 0.1L. Although FIG. 9 shows the case where the point P4 is located at the non-seal portion 15, the point P4 may be located at the side end portion 14 (seal portion 11). Although FIG. 9 shows only one side end 14 side, the other side end 14 has the same configuration.

  When opening the packaging bag 10 </ b> D, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy-open processing portion 24, and the cut reaches the boundary between the easy-open processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut lines 21c and 21 or the first half-cut lines 21d and 21, while the laminated film 12 is taken along the second half-cut line 22 or the third half-cut line 23. Will be cut. The second half-cut line 22 and the third half-cut line 23 reach the easy opening portion 24 while being separated from each other, and the interval between the end point P2 and the end point P3 may be about 2 to 8 mm. By providing the start points (end points P2, P3) of the half-cut lines 21c, 21d, 22, and 23 at the corners of the easy-opening portion 24 having a quadrangular shape, the opening that starts from the end portion 24a of the easy-opening processing portion 24 is an end point. It is easy to reach P2 or the end point P3. After the cut reaches the end point P2 or the end point P3, the packaging bag is formed along the first half-cut lines 21c and 21 and the second half-cut line 22 or the first half-cut lines 21d and 21 and the third half-cut line 23. 10D is opened.

<Sixth Embodiment>
FIG. 10 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10E according to the sixth embodiment of the present invention. The opening means 20 of the packaging bag 10E is provided with three second half-cut lines 22a, 22b, and 22c and three third half-cut lines 23a, 23b, and 23c. This is different from the means 20 (FIG. 7). Note that the number of these half-cut lines is not limited to three.

  As shown in FIG. 10, the second half-cut line 22 a and the third half-cut line 23 a start from an end point P <b> 1 located at the boundary between the easy-open processed part 24 and the seal part 11. That is, the second half-cut line 22a and the third half-cut line 23a are a combination in which the end points coincide with each other. On the other hand, the second half-cut line 22b and the third half-cut line 23b start from the end point P5 and the end point P6 that are located at the boundary between the easy-opening processed part 24 and the seal part 11, respectively. In addition, the second half-cut line 22c and the third half-cut line 23c are the boundary between the easy-open process part 24 and the seal part 11 and the end point P2 and the end point P3 located at the corners of the easy-open process part 24, respectively. The starting point. That is, the end points of the combination of the second half-cut line 22b and the third half-cut line 23b and the combination of the second half-cut line 22c and the third half-cut line 23c are separated from each other. The end points P1, P2, P3, P5, and P6 are all at positions facing the end portion 24a of the easy-open processing portion 24. FIG. 10 shows only one side end 14 side, but the other side end 14 has the same configuration.

  When opening the packaging bag 10 </ b> E, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy opening processing portion 24, and the cut reaches the boundary between the easy opening processing portion 24 and the seal portion 11. Thereafter, the laminated film 13 is cut along the first half-cut line 21, while the laminated film 12 is either the second half-cut line 22a, 22b, or 22c or the third half-cut line 23a, 23b, or 23c. It will be cut along the crab.

<Seventh embodiment>
FIG. 11 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10F according to the seventh embodiment of the present invention. The opening means 20 of the packaging bag 10F further includes a third half-cut line 23a starting from the end point P2 and a second half-cut line 22a starting from the end point P3, and the opening means of the packaging bag 10C described above. 20 (FIG. 8). As shown in FIG. 11, the second half-cut line 22 and the third half-cut line 23 a are the end points located at the lower corner of the easy-opening portion 24 and the boundary between the easy-opening portion 24 and the seal portion 11. Starting from P2. The second half-cut line 22 a and the third half-cut line 23 start from an end point P <b> 3 that is a boundary between the easy-open process part 24 and the seal part 11 and is located at the upper corner of the easy-open process part 24. The second half-cut line 22 and the third half-cut line 23 reach the easy-opening processing portion 24 while being separated from each other. In this embodiment, the distance between the end point P2 and the end point P3 may be about 5 to 12 mm. In FIG. 11, only one side end 14 side is shown, but the other side end 14 has the same configuration.

  When opening the packaging bag 10 </ b> F, first, a layer including an aluminum layer is cut from the end portion 24 a of the easy-open processing portion 24, and the cut reaches the boundary between the easy-open processing portion 24 and the seal portion 11. Thereafter, when the laminated film 13 is cut along the first half-cut line 21a, the laminated film 12 is cut along the second half-cut line 22 or the third half-cut line 23a. When the laminated film 13 is cut along the first half-cut line 21b, the laminated film 12 is cut along the second half-cut line 22a or the third half-cut line 23.

  In each of the above-described embodiments, the first half-cut line, the second half-cut line, and the third half-cut line are linear grooves (cuts) and are layers on the outer surface side of the aluminum layers of the laminated films 12 and 13. It is formed by cutting away. For example, a method using a die cutter or a method of irradiating laser light can be applied.

  The packaging bags 10, 10 </ b> A, 10 </ b> B, 10 </ b> C, 10 </ b> D, 10 </ b> E, and 10 </ b> F in each of the above-described embodiments can be manufactured by the following procedure, for example. First, an intermediate layer, a sealant layer, and the like are bonded to a printed base film. Then, each half-cut line and the easy-open process part 24 are formed, aligning a printing pattern. Thereafter, the seal portion 11 is cut and cut into pieces to be divided into individual bags.

  By forming each half-cut line and the easy-opening processing part 24 before slitting the pair of laminated films 12 and 13 to a predetermined width, the half-cut line and the easy-opening processing part 24 can be efficiently made using a laser beam. Can be formed. The formation of the seal portion 11 and the formation of the half-cut line and the easy-open processing portion 24 by laser light may be performed simultaneously. However, the order of each process is not limited to the above example, and the half-cut line and the easy-open processing portion 24 may be formed after the laminated films 12 and 13 are slit to a predetermined width.

  Next, the sealant layers 12a and 13a of the laminated films 12 and 13 are opposed to each other, and the sealant layers 12a and 13a are bonded to each other in a state where, for example, a fastener tape serving as the resealing means 30 is sandwiched between the upper end portion 17 and The seal portion 11 is formed at a position corresponding to the side end portions 14, 14, and the non-seal portion 15 surrounded by the seal portion 11 in a U shape is formed.

  The article to be packaged is filled from the lower end 16 in an unsealed state. Thereafter, the laminated films 12 and 13 are bonded at the lower end portion 16 to form the seal portion 11 also at the lower end portion 16. In this way, the packaging bags 10, 10A, 10B, 10C, 10D, 10E, 10F can be manufactured.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments. For example, in the said embodiment, although the packaging bag provided with the resealing means 30 was illustrated, providing the resealing means 30 is not essential and it is good also as a structure which does not provide a resealing means according to a use. .

  In the above-described embodiment, the semi-circular and quadrangular easy-open process parts 24 are illustrated, but the shape of the easy-open process part 24 is not limited to a semicircular or quadrangular shape (square or rectangular). (A)-(d) of Drawing 12 is a partial top view showing typically other examples of the shape of an easy-open processing part. The easy-open process part 24 shown to (a) of FIG. 12 is exhibiting U shape (shape which combined the rectangle and the semicircle). The easy opening portion 24 shown in FIG. 12B has a triangular shape (V shape). The easy-open process part 24 shown to (c) of FIG. 12 is exhibiting the elongate square shape (I shape). The easy-open process part 24 shown to (d) of FIG. 12 is exhibiting the pentagon shape (The shape which combined the rectangle and the isosceles triangle).

  (A)-(d) of FIG. 13 is a partial top view which shows typically the further another example of the shape of an easy-open process part. In the easy opening portion 24 shown in these drawings, the upper and lower boundaries with the seal portion 11 are respectively continuous with the second half-cut line 22 and the third half-cut line 23 (the second half-cut line 22 and the second half-cut line 22 and Formed by extension lines of the third half-cut line 23). In other words, the second half-cut line 22 and the third half-cut line 23 reach the side end of the packaging bag while being separated from each other, and the second half-cut line 22 and the second half-cut line 22 at the side end part 14 (seal part 11) of the packaging body. The easy-opening processing part 24 which makes the 3 half-cut line 23 the boundary of a lower side and an upper side is formed.

  In the easy opening portion 24 shown in FIG. 13A, the remaining boundary with the seal portion 11 is formed by a line that linearly connects the end point P2 and the end point P3 in the vertical direction, and the first half-cut line is formed in the middle thereof. 21 end point P1 is located. The easy opening portion 24 shown in FIG. 13B extends obliquely upward from the end point P2 in the direction opposite to the end portion 24a, and bends in the direction of the end portion 24a at the end point P1 of the first half-cut line 21. The remaining boundary with the seal portion 11 is formed by a line reaching the end point P3. In the easy-opening portion 24 shown in FIG. 13C, the remaining boundary with the seal portion 11 is formed by a line that linearly connects the end point P2 and the end point P3, and two from the end point P2 and the end point P3. The first half-cut lines 21a and 21b extend. The easy opening portion 24 shown in FIG. 13 (d) is obliquely above the end point P2 and extends in the direction of the end portion 24a, and is bent in the direction of the end portion 24a and reaches the end point P3. And the two first half-cut lines 21a and 21b extend from the end point P2 and the end point P3. By providing the end point of the half-cut line at the corner of the easy-opening processing part 24, the opening that starts from the end part 24a of the easy-opening processing part 24 tends to reach the end point, and then the packaging bag is opened along the half-cut line. Cheap.

  In the above embodiment, a packaging bag that is a four-sided bag is illustrated, but the packaging bag of the present invention may be a three-sided sealing bag or a standing pouch shape to which a bottom tape is added. In addition, it is also possible to apply the element which comprises one embodiment of the said embodiment to another embodiment.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging bag which is easy to cut along the half cut line from an easy opening process part is provided.

10, 10A, 10B, 10C, 10D, 10E, 10F ... packaging bag, 11 ... sealed portion, 12, 13 ... laminated film, 12b, 13b ... barrier layer (aluminum layer), 14 ... side edge, 15 ... non-sealed Part, 16 ... lower end part, 17 ... upper end part, 18 ... accommodating part, 20 ... opening means, 21, 21a, 21b, 21c, 21d ... first half-cut line, 22, 22a, 22b, 22c ... second half-cut Wire, 23, 23a, 23b, 23c ... third half-cut wire, 24 ... easy-opening processing part, 30 ... resealing means, 40 ... cut, F1 ... inner surface, F2 ... outer surface, P1, P2, P3, P5 P6 ... Endpoint.

Claims (10)

A pair of laminated films, a seal part that is bonded together, a container part that encloses an article to be packaged in a non-seal part inside the seal part, a pair of side end parts, and a cut between them. And a packaging bag comprising unsealing means for unsealing the accommodating portion,
The opening means is
The easy opening portion provided at each of the pair of side end portions, the first half-cut line provided on one of the pair of laminated films so as to cross between the easy opening portions, and the pair On the other side of the laminated film, a second half-cut line provided so as to swell on the lower end side and a third half-cut line provided so as to swell on the upper end part between the easy-opening processed parts,
The pair of laminated films have at least a base material layer, an aluminum layer, and a sealant layer in this order from the outer surface to the inner surface of the packaging bag,
The easy opening portion is a packaging bag in which a layer on the outer surface side of the aluminum layer is removed from the pair of laminated films so that the aluminum layer is exposed on the outer surface of the packaging bag.   The packaging bag according to claim 1, wherein an end point of the second half-cut line and an end point of the third half-cut line are located at a boundary between the easy-opening processed part and the seal part.   The packaging bag according to claim 2, wherein an end point of the second half-cut line and an end point of the third half-cut line coincide with each other at a boundary between the easy-opening processed part and the seal part.   The packaging bag according to claim 2, wherein an end point of the second half-cut line and an end point of the third half-cut line are separated from each other at a boundary between the easy-opening processed part and the seal part.   The packaging bag according to any one of claims 1 to 4, wherein the easy-opening portion has a triangular shape, a quadrangular shape, a pentagonal shape, a semicircular shape, or a U-shape.   The said easy-open process part is formed by volatilizing and removing the layer of the outer surface side rather than the said aluminum layer by laser irradiation in the process which manufactures the said packaging bag. Packaging bag as described in.   The packaging bag according to any one of claims 1 to 6, wherein the opening means includes a plurality of the second half-cut lines and a plurality of the third half-cut lines.   The opening means includes a combination in which an end point of the second half-cut line and an end point of the third half-cut line coincide with each other at the boundary between the easy-open processing part and the seal part, and the second half-cut The packaging bag of Claim 7 which has the combination which the end point of a line | wire and the end point of the said 3rd half cut line are spaced apart.   The packaging bag according to claim 7 or 8, wherein the opening means has a plurality of the first half-cut lines. The packaging bag as described in any one of Claims 1-9 further equipped with the resealing means which reseals the said accommodating part after opening by the said unsealing means to the said accommodating part side rather than the said opening means.

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