JP6766926B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag.

A packaging bag for sealing and storing an object to be packaged 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 also a packaging bag in which a resealing means such as a synthetic resin fastener is attached in the vicinity of the opening so that the bag can be resealed even after opening. By providing the packaging bag with the resealing means, the packaged object can be repeatedly sealed and stored even when the packaged object is not consumed all at once but is consumed several times.

As a method of opening such a packaging bag, a method of cutting open a laminated film is generally performed by using an easy-opening processed portion such as a U-shaped, V-shaped or I-shaped notch provided in the sealing portion at the side end as a trigger. Is the target. However, when opening the packaging bag, the crevice may bend to cut the resealing means after starting the cutting from the easy-opening processed portion. In order to avoid such a situation, it is also known to insert a half-cut line that serves as an opening trajectory in advance in the vicinity of the easy-opening processing portion so that the cut end does not bend in an unexpected direction.

By the way, the above-mentioned packaging bag is formed by partially laminating 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 films are difficult to grasp and open when opening or resealing from the resealed state. In order to solve such a problem, a technique has been proposed in which the trajectories of the half-cut lines are different on the front surface and the back surface of the packaging bag so that the laminated film can be easily grasped after opening (see, for example, Patent Documents 1 and 2). ).

Japanese Unexamined Patent Publication No. 2013-209159 Japanese Unexamined Patent Publication No. 2013-209160

As described above, the conventional packaging bag is opened with an easy-opening processed portion such as a U-shaped, V-shaped or I-shaped notch as a trigger. However, even if a half-cut line is formed on the laminated film as in Patent Documents 1 and 2, the cut end is formed diagonally deviating from the expected trajectory, and an opening of a sufficient size cannot be formed. Or, if there was a resealing means, it could be damaged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packaging bag that can be easily opened from an easy-opening processing portion along a half-cut line.

As a result of examining a new mode of the easy-opening processed portion in place of the conventional U-shaped, V-shaped or I-shaped notch, the present inventors are useful for opening the packaging bag along the half-cut line. We have found various aspects and have completed the present invention.

The packaging bag according to the present invention includes the following invention-specific items.
The packaging bag according to the present invention has a sealing portion formed by laminating the peripheral edges of a pair of laminated films, an accommodating portion for encapsulating an object to be packaged in a non-sealing portion inside the sealing portion, and a pair of side ends and between them. It is provided with an opening means for opening the accommodating portion by cutting so as to cross the.
The opening means includes an easy-opening processed portion provided on each of the pair of side end portions, and a first half-cut line provided on one of the pair of laminated films so as to cross between the easy-opening processed portions. On the other side of the pair of laminated films, there is a second half-cut line provided so as to bulge toward the lower end portion side and a third half-cut line provided so as to bulge toward the upper end portion side between the easy-opening processed portions.
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 processed portion is formed by removing the layers on the outer surface side of the aluminum 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 according to the present invention, there is an effect that the bag can be easily opened from the easily opened processed portion along the half-cut line. The main reason for this is not necessarily clear, but in other words, the easy-to-open processed portion has the above configuration, that is, the layers on the outer surface side of the aluminum layer are removed from the pair of laminated films so that the aluminum layer is exposed on the outer surface. For example, at least the aluminum layer and the sealant layer remain in the easy-opening processed portion, so that even if the user opens the packaging bag vigorously, these layers in the easy-opening processed portion act as a cushion and the momentum is reduced. Will be done. As a result, the present inventors presume that the trajectory of the cut is easily transferred from the easily opened processed portion to the half-cut line, and then the cut is formed along the half-cut line.

The plastic film is difficult for a person to tear with a finger without a U-shaped, V-shaped or I-shaped notch or scar group, whereas the aluminum layer is stronger than the plastic film. Since it is (rigid), it has the property of being easily torn. A person can easily make a cut with a finger in the easily opened processed portion where the aluminum layer is exposed on the outermost layer without forming the above-mentioned notch or scar group.

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

Examples of the shape of the easy-opening processed portion include a triangular shape (V shape), a square shape (I shape in the case of an elongated square shape), a pentagonal shape, a semicircular shape, and a U shape. The easy-opening processed portion is preferably formed by volatilizing and removing a layer on the outer layer side of the aluminum layer by irradiating a laser in the process of manufacturing the packaging bag. By volatilizing and removing the easy-opening processed portion, unlike the conventional U-shaped, V-shaped or I-shaped (particularly U-shaped or V-shaped) notch, in the forming process of the easy-opening processed portion. There is an advantage that a film piece is not generated.

The opening 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 the seal along any of the plurality of second and third half-cut lines regardless of the direction in which the force is applied to the easy-opening processed portion at the time of opening. In this case, the opening means includes a combination in which the end points of the second half-cut line and the end points of the third half-cut line coincide with each other at the boundary between the easy-open processing portion and the seal portion, and the end points of the second half-cut line. And may have a combination in which the end points of the third half-cut line are separated from each other. Further, the opening means may have a plurality of first half-cut lines.

The packaging bag may be further provided with a resealing means for resealing the accommodating portion after being opened by the opening means on the accommodating portion side of the opening means.

According to the present invention, there is provided a packaging bag that can be easily cut open along a half-cut line from an easily opened processed portion.

It is a top view which shows typically the packaging bag which concerns on 1st Embodiment. It is a top view of the packaging bag shown in FIG. 1 when viewed from the back surface. It is sectional drawing which shows typically an example of the laminated structure of a pair of laminated films and the easy-opening processed part formed in the sealing part. (A) is a plan view showing a state in which the packaging bag of FIG. 1 is cut open along the first and second half-cut lines, and (b) is a plan view showing the state in which the packaging bag of FIG. 1 is cut open along the first and second half-cut lines. It is a top view which shows the state which opened along. It is a partial plan view which shows a part of the opening means of the packaging bag of FIG. 1 enlarged. It is a partial plan view which enlarges and shows a part of the opening means of the packaging bag which concerns on 2nd Embodiment. It is a partial plan view which enlarges and shows a part of the opening means of the packaging bag which concerns on 3rd Embodiment. It is a partial plan view which enlarges and shows a part of the opening means of the packaging bag which concerns on 4th Embodiment. It is a partial plan view which enlarges and shows a part of the opening means of the packaging bag which concerns on 5th Embodiment. It is a partial plan view which shows the part of the opening means of the packaging bag which concerns on 6th Embodiment enlarged. It is a partial plan view which enlarges and shows a part of the opening means of the packaging bag which concerns on 7th Embodiment. (A) to (d) are partial plan views schematically showing another example of the shape of the easily opened processed portion. (A) to (d) are partial plan views schematically showing still another example of the shape of the easily opened processed portion.

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 the present invention is not intended to be limited to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and duplicate description may be omitted in some cases. Further, unless otherwise specified, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings. Furthermore, the dimensional ratios in the drawings are not limited to the ratios shown.

<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 surface side of the packaging bag. The packaging bag 10 includes a sealing portion 11 formed by laminating the peripheral edges of a pair of substantially rectangular laminated films 12 and 13 and an accommodating portion 18 formed between the pair of laminated films 12 and 13 by the sealing portion 11. .. That is, in the packaging bag 10, the side end portion 14, the lower end portion 16, and the upper end portion 17 are sealed by the seal portion 11. The packaging bag 10 includes a non-seal portion (sheet portion) 15 surrounded by a seal portion 11 and a storage portion 18 for accommodating an object to be packaged such as food. An object to be packaged such as food is sealed in the accommodating portion 18. The seal portion 11 of the lower end portion 16 may be sealed after the container 18 is filled with the packaged object.

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

Examples of the material constituting the sealant layers 12a and 13a include polyolefin resins. 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-based resin; a blended resin of polyethylene and polybutene; polypropylene-based resins such as homopolypropylene resin, propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer.

Examples of the material constituting the barrier layers 12b and 13b include an aluminum foil (aluminum layer). The aluminum foil has gas barrier properties, water vapor barrier properties, and the like. The barrier layers 12b and 13b are not limited to aluminum foils as long as the user can tear them with a finger. For example, an aluminum vapor-deposited film obtained by depositing aluminum on a resin film that can be torn with a finger to form an aluminum layer is used as a barrier layer. It may be used as 12b and 13b.

Examples of the material constituting the base material layers 12c and 13c include biaxially stretched films such as biaxially stretched polyethylene terephthalate (PET) film, biaxially stretched polypropylene (PP) film, and biaxially stretched nylon film. The laminated structure of the laminated films 12 and 13 is not limited to the above-described aspect, and layers of various materials can be used depending on the type of the object to be packaged, the required level of airtightness, and the like. The base material layer may be composed of a plurality of layers, and may be composed of, for example, a biaxially stretched PET film and a biaxially stretched PP film. Further, an adhesive layer may be interposed between the layers constituting the laminated films 12 and 13, if necessary.

The packaging bag 10 is provided on the upper end side of the non-sealing portion 15 with an opening means 20 for opening and opening the side ends 14, 14 of the packaging bag 10 so as to cross between them, and below the opening means 20. A resealing means 30 for resealing the accommodating portion 18 after opening by the opening means 20 is provided.

As the resealing means 30, a known structure capable of repeatedly opening and sealing can be appropriately adopted. For example, it may be a fastener made of synthetic resin that can be repeatedly sealed by fitting a band-shaped protrusion and a band-shaped groove, or may be an adhesive seal.

As shown in FIG. 2, the opening 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-opening processed portion 24 provided on the sealing portion 11 to the other easy-opening processed portion 24. Further, as shown in FIG. 1, the opening means 20 is placed on the surface of the other (front side) laminated film 12 with the side ends 14 and 14 on the lower end 16 side (resealing means 30 side). A third half-cut formed so as to bulge between the second half-cut line 22 formed so as to swell and the side ends 14 and 14 on the opposite side of the second half-cut line 22 (upper end 17 side). It has a line 23 and. 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 as to have a positional relationship so as to sandwich the portion.

The second half-cut line 22 is provided so as to have a downwardly convex shape in FIG. 1, and the third half-cut line 23 is provided so as to have an upwardly convex shape 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 left or right easy-opening processing portion 24, from the viewpoint of smoothing the opening, from the viewpoint of smoothing the cut end after the opening. From the viewpoint of sharpness, it is preferable that the shape is symmetrical with respect to the center line traversing 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 symmetrical with respect to the 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 curved shape such as a parabola or an arc as shown in FIG. 1, and may be a trapezoidal shape composed of a plurality of straight lines. 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 0.05L to 0.3L on the center line that vertically traverses 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 area surrounded by the second half-cut line 22 and the third half-cut line 23. There is. Thereby, even if the packaging bag 10 is cut open from either the left or right side end portion 14, or the upper end portion 17 is pulled toward the front side or pushed toward the back side to be cut open, the packaging bag is opened. When the 10 is cut open by the opening means 20, the opening paths of the laminated film 12 and the laminated film 13 can be shifted. This makes it possible to facilitate the opening of the resealing means 30 after the opening.

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 gripped. As a result, the packaging bag 10 can be easily opened and reopened. 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 gripped. As a result, the packaging bag 10 can be easily opened and reopened.

FIG. 5 is a partial plan view showing a part of the opening means 20 of the packaging bag 10 in an enlarged manner. The opening means 20 has an easy-opening processing portion 24 at the side end portion 14 including the first half-cut line 21. The easy-open processing unit 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 layers 12a and 13a are fused by heat to form the sealant layer (see FIG. 3).

The easy-opening processed portion 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. The easy-opening processed portion 24 is preferably formed by volatilizing and removing the layer on the outer layer side of the aluminum layer by irradiation with a laser. Unlike the conventional U-shaped, V-shaped or I-shaped (particularly U-shaped or V-shaped) notch, the removal of volatilization by laser has the advantage that a film piece is not generated in the process of forming the easy-opening processed portion 24. There is. Further, since the aluminum layer exposed on the easy-opening processed portion 24 is easily visible to the user, it is not always necessary to print the base material layers 12c and 13c to make the easy-opening processed portion 24 stand out.

The first half-cut line 21, the second half-cut line 22, and the third half-cut line 23 all converge to the end point P1 located at the boundary between the easy-open processing portion 24 and the seal portion 11 (FIGS. 1 and 1). See 2 and 5). When opening the packaging bag 10, first, the layer including the aluminum layer in the easy-opening processed portion 24 is cut, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, 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 at the boundary between the easy-opening processed portion 24 and the sealing portion 11 and at a position facing the end portion 24a of the easy-opening processed portion 24, the opening starting from the end portion 24a of the easy-opening processed portion 24 is the first. The 1 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 a 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 in an enlarged manner. The opening means 20 of the packaging bag 10A is different from the opening means 20 of the packaging bag 10 (FIG. 5) in that the second half-cut line 22 and the third half-cut line 23 are displaced downward and upward, respectively. .. As shown in FIG. 6, the first half-cut line 21 starts from the end point P1, while 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 is the third half. 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-opening processing portion 24 while being separated from each other. The end points P1, P2, and P3 are all at the boundary between the easy-opening processed portion 24 and the sealing portion 11 and at a position facing the end portion 24a of the easy-opening processed portion 24. Although FIG. 6 shows only one side end portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10A, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, 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 points P1 and the end points P2 and P3 is about 1 to 4 mm, the opening starting from the end 24a of the easy-open processing portion 24 is made into the first half cut line 21 and the second half cut line 22 or the third half cut. The line 23 can be easily reached.

<Third Embodiment>
FIG. 7 is a 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 in an enlarged manner. The opening means 20 of the packaging bag 10B is different from the opening means 20 of the packaging bag 10A (FIG. 6) 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, while the second half-cut line 22 starts from the end point P2 located on the lower end 16 side of the end point P1. 3 The 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-opening 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 processed portion 24 and the sealing portion 11, and the end points P2 and P3 are located at the corners of the easy-opening processed portion 24 having a quadrangle. Further, the end points P1, P2, and P3 are all located at positions facing the end portion 24a of the easy-opening processed portion 24. Although FIG. 7 shows only one side end portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10B, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, 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 points P1 and the end points P2 and P3 is about 1 to 4 mm. By providing the starting points (end points P2 and P3) of the half-cut lines 22 and 23 at the corners of the easy-opening processed portion 24 having a quadrangle, the first half-cut line makes a cut starting from the end 24a of the easy-opening processed portion 24. The 21 and the second half-cut line 22 or the third half-cut line 23 can be easily reached.

<Fourth Embodiment>
FIG. 8 is a 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 in an enlarged manner. The opening means 20 of the packaging bag 10C is described above in that two first half-cut lines 21a and 21b are formed starting from the corners (end points P2 and P3) of the easy-opening processed portion 24 having a quadrangle. This is different 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. Both the end points P2 and P3 are located at the boundary between the easy-opening processed portion 24 and the sealing portion 11 and at the corner of the easy-opening processed portion 24 having a quadrangular shape. Further, the end points P2 and P3 are both located at positions facing the end portion 24a of the easy-opening processed portion 24. Although FIG. 8 shows only one side end portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10C, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, 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 processing portion 24 while being separated from each other, and the distance between the end point P2 and the end point P3 may be about 2 to 8 mm. By providing the starting points (end points P2 and P3) of the half-cut lines 21a, 21b, 22 and 23 at the corners of the easy-opening processed portion 24 having a quadrangle, the incision starting from the end 24a of the easy-opening processed portion 24 is the end point. It is easy to reach P2 or the end point P3. After this opening 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. To.

<Fifth Embodiment>
FIG. 9 is a 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 in an enlarged manner. The opening means 20 of the packaging bag 10D is different from the opening means 20 of the packaging bag 10B (FIG. 7) 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-opening processed portion 24 and the point P4 may be about 0.05 L to 0.1 L. Although FIG. 9 shows a 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 portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10D, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, the laminated film 13 is cut along the first half-cut line 21c, 21 or the first half-cut line 21d, 21, while the laminated film 12 is cut 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 processing portion 24 while being separated from each other, and the distance between the end point P2 and the end point P3 may be about 2 to 8 mm. By providing the starting points (end points P2 and P3) of the half-cut lines 21c, 21d, 22 and 23 at the corners of the easy-opening processed portion 24 having a quadrangle, the incision starting from the end 24a of the easy-opening processed portion 24 is the end point. It is easy to reach P2 or the end point P3. After this opening reaches the end point P2 or the end point P3, the packaging bag is formed along the first half-cut line 21c, 21 and the second half-cut line 22, or the first half-cut line 21d, 21 and the third half-cut line 23. 10D is opened.

<Sixth Embodiment>
FIG. 10 is a 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 in an enlarged manner. The opening means 20 of the packaging bag 10E includes three second half-cut lines 22a, 22b, 22c and three third half-cut lines 23a, 23b, 23c, and thus opens the above-mentioned packaging bag 10B. It differs from the means 20 (FIG. 7). The number of these half-cut lines is not limited to three.

As shown in FIG. 10, the second half-cut line 22a and the third half-cut line 23a start from an end point P1 located at the boundary between the easy-open processing portion 24 and the seal portion 11. That is, the second half-cut line 22a and the third half-cut line 23a are a combination in which their respective end points match. On the other hand, the second half-cut line 22b and the third half-cut line 23b have end points P5 and end points P6 located at the boundary between the easy-open processing portion 24 and the seal portion 11 as starting points, respectively. Further, the second half-cut line 22c and the third half-cut line 23c have end points P2 and end points P3 that are boundaries between the easy-opening processed portion 24 and the sealing portion 11 and are located at the corners of the easy-opening processed portion 24, respectively. It is 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 located at positions facing the end 24a of the easy-opening processed portion 24. Although FIG. 10 shows only one side end portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10E, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, the laminated film 13 is cut along the first half-cut line 21, while the laminated film 12 is any of the second half-cut lines 22a, 22b, 22c or the third half-cut line 23a, 23b, 23c. It will be cut along the crab.

<7th Embodiment>
FIG. 11 is a 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 in an enlarged manner. The opening means 20 of the packaging bag 10F is further provided with 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. It is different from 20 (Fig. 8). As shown in FIG. 11, the second half-cut line 22 and the third half-cut line 23a are end points located at the lower corner of the easy-opening processed portion 24 and at the boundary between the easy-opening processed portion 24 and the sealing portion 11. The starting point is P2. The second half-cut line 22a and the third half-cut line 23 start from an end point P3 which is a boundary between the easy-opening processed portion 24 and the sealing portion 11 and is located at the upper corner of the easy-opening processed portion 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, and in the present embodiment, the distance between the end point P2 and the end point P3 may be about 5 to 12 mm. Although FIG. 11 shows only one side end portion 14 side, the other side end portion 14 side also has the same configuration.

When opening the packaging bag 10F, first, a layer including an aluminum layer is cut from the end portion 24a of the easy-opening processed portion 24, and the cut reaches the boundary between the easy-opening processed portion 24 and the sealing portion 11. After that, 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. Is formed by cutting out. For example, a method using a die cutter and a method of irradiating a laser beam can be applied.

The packaging bags 10, 10A, 10B, 10C, 10D, 10E, and 10F in each of the above-described embodiments can be produced, for example, by the following procedure. First, an intermediate layer, a sealant layer, and the like are attached to the printed base film. After that, each half-cut line and the easy-opening processed portion 24 are formed while aligning the printed pattern. After that, the seal portion 11 is cut and cosmetically cut to divide it into individual bags.

By forming each half-cut line and easy-opening processed portion 24 before slitting the pair of laminated films 12 and 13 to a predetermined width, the half-cut line and easy-opening processed portion 24 can be efficiently formed by using laser light. Can be formed. The seal portion 11 may be formed, and the half-cut line and the easy-opening processed portion 24 may be formed by laser light at the same time. However, the order of each step is not limited to the above example, and the half-cut line and the easy-opening processed 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 adhered to each other with, for example, a fastener tape serving as the resealing means 30, sandwiched between the upper end portions 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 object to be packaged is filled from the lower end 16 in the unsealed state. After that, the laminated films 12 and 13 are adhered at the lower end portion 16 to form the seal portion 11 at the lower end portion 16. In this way, packaging bags 10, 10A, 10B, 10C, 10D, 10E, 10F can be manufactured.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, in the above embodiment, the packaging bag provided with the resealing means 30 has been illustrated, but it is not essential to provide the resealing means 30, and the resealing means may not be provided depending on the application. ..

In the above embodiment, the semicircular and square easy-opening processed portions 24 are illustrated, but the shape of the easy-opening processed portion 24 is not limited to the semicircular or rectangular shape (square or rectangular). 12 (a) to 12 (d) are partial plan views schematically showing another example of the shape of the easily opened processed portion. The easy-opening processing portion 24 shown in FIG. 12A has a U-shape (a shape combining a rectangle and a semicircle). The easy-opening processed portion 24 shown in FIG. 12B has a triangular shape (V shape). The easy-opening processed portion 24 shown in FIG. 12 (c) has an elongated quadrangular shape (I-shape). The easy-opening processed portion 24 shown in FIG. 12D has a pentagonal shape (a shape combining a rectangle and an isosceles triangle).

13 (a) to 13 (d) are partial plan views schematically showing still another example of the shape of the easily opened processed portion. In the easy-opening processed portion 24 shown in these figures, the upper and lower boundaries with the sealing portion 11 are continuous with the second half-cut line 22 and the third half-cut line 23 (the second half-cut line 22 and the third half-cut line 23, respectively). Each is formed by an extension 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 and the third half-cut line 23 at the side end portion 14 (seal portion 11) of the packaging body. 3 The easy-opening processed portion 24 having the half-cut line 23 as the boundary between the lower side and the upper side is formed.

In the easy-opening processed portion 24 shown in FIG. 13A, the remaining boundary with the sealing portion 11 is formed by a line connecting the end points P2 and the end points P3 in a straight line in the vertical direction, and the first half-cut line is formed in the middle. The end point P1 of 21 is located. The easy-opening processed portion 24 shown in FIG. 13B extends diagonally upward from the end point P2 and extends in the direction opposite to the end portion 24a, and is bent 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 the line leading to the end point P3. In the easy-opening processed portion 24 shown in FIG. 13 (c), the remaining boundary with the sealing portion 11 is formed by a line connecting the end points P2 and the end points P3 in a straight line in the vertical direction, and two from the end points P2 and the end points P3. The first half-cut lines 21a and 21b of the above extend. The easy-opening processed portion 24 shown in FIG. 13 (d) is obliquely upward from 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 in the middle to reach the end point P3. The remaining boundary with and is formed, and two first half-cut lines 21a and 21b extend from the end points P2 and the end points P3. By providing the end points of the half-cut line at the corners of the easy-open processing portion 24, the incision starting from the end 24a of the easy-open processing portion 24 can easily reach the end point, and then the packaging bag is opened along the half-cut line. Cheap.

In the above embodiment, the packaging bag which is a four-sided bag is illustrated, but the packaging bag of the present invention may be a three-sided sticker bag or a standing pouch shape to which a bottom tape is added. It is also possible to apply the elements constituting one embodiment of the above embodiments to another embodiment.

According to the present invention, there is provided a packaging bag that can be easily cut open along a half-cut line from an easily opened processed portion.

10, 10A, 10B, 10C, 10D, 10E, 10F ... Packaging bag, 11 ... Sealing part, 12, 13 ... Laminated film, 12b, 13b ... Barrier layer (aluminum layer), 14 ... Side end, 15 ... Unsealed Part, 16 ... lower end, 17 ... upper end, 18 ... accommodating part, 20 ... opening means, 21,21a, 21b, 21c, 21d ... first half-cut line, 22, 22a, 22b, 22c ... second half-cut Wires, 23, 23a, 23b, 23c ... Third half-cut wire, 24 ... Easy-opening processed part, 30 ... Resealing means, 40 ... Cut edge, F1 ... Inner surface, F2 ... Outer surface, P1, P2, P3, P5 P6 ... End point.

Claims (9)

A sealing portion formed by laminating the peripheral edges of a pair of laminated films, an accommodating portion for encapsulating an object to be packaged in a non-sealing portion inside the sealing portion, a pair of side ends, and cutting so as to cross between them. A packaging bag provided with an opening means for opening the housing portion.
The opening means is
An easy-opening processed portion provided on each of the pair of side end portions, and a plurality of first half-cut lines provided on one of the pair of laminated films so as to cross between the easy-opening processed portions. On the other side of the pair of laminated films, a second half-cut line provided so as to bulge toward the lower end portion and a third half-cut line provided so as to bulge toward the upper end portion are provided between the easy-opening processed portions. And
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 easily openable processing unit is constituted by the pair of laminated films of the aluminum layer outer surface side of the layer are removed such that the aluminum layer on the outer surface of this the packing bag is exposed,
The shape of the easy-opening processed portion is a quadrangular shape or a pentagonal shape.
A packaging bag in which the end points of the plurality of first half-cut lines are located at the corners of the easy-opening processed portion and are located at different corners. The packaging bag according to claim 1, wherein the end point of the second half-cut line and the end point of the third half-cut line are located at the boundary between the easy-opening processed portion and the sealing portion. The packaging bag according to claim 2, wherein 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-opening processed portion and the sealing portion. The packaging bag according to claim 2, wherein the end point of the second half-cut line and the end point of the third half-cut line are separated from each other at the boundary between the easy-opening processed portion and the sealing portion. The easy-opening processed portion is formed by volatilizing and removing a layer on the outer surface side of the aluminum layer by irradiation with a laser in the process of manufacturing the packaging bag, according to any one of claims 1 to 4. The packaging bag described in. The packaging bag according to any one of claims 1 to 5 , wherein the opening means has 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 the end points of the second half-cut line and the end points of the third half-cut line coincide with each other at the boundary between the easy-open processing portion and the seal portion, and the second half-cut. The packaging bag according to claim 6 , further comprising a combination in which the end point of the wire and the end point of the third half-cut wire are separated from each other. The packaging bag according to any one of claims 1 to 7 , further comprising a resealing means for resealing the accommodating portion after being opened by the opening means on the accommodating portion side of the opening means. The packaging bag according to any one of claims 1 to 8 , which has a standing pouch shape.

Images