JP7449669B2 - packaging bag - Google Patents

Description

The present invention relates to packaging bags.

Various types of packaging bags are known as packaging bags made of film. Among them, gusset-type packaging bags are used in various fields including the packaging of sweets and the like because they can be packed compactly and efficiently. Gusset-style packaging bags are generally opened on the sides by tearing them apart starting from a notch at the end, but if the contents are packaged with few gaps, the contents may be separated. There may be interference with the cracks. For example, if soft contents such as yokan are packaged, the contents may be damaged when the package is opened.

In recent years, packaging bags have been known in which the back or front side is opened in order to easily take out the contents (Patent Documents 1 and 2). However, the above-mentioned gusset-type packaging bag, which is opened on the back or front side, may not be easily opened. Furthermore, when opening the package, an unintended tear may occur, resulting in a smaller opening than planned, making it difficult to take out the contents.

Japanese Patent Application Publication No. 2008-105719 JP2014-234236A

The present invention has been made to solve the above-mentioned conventional problems, and its main purpose is to provide a packaging bag that can be easily opened and the contents can be easily taken out after opening.

The packaging bag of the present invention has a front surface and a back surface facing each other, a first side surface and a second side surface formed between the front surface and the back surface and facing each other, and a seal between the front surface and the back surface. A packaging bag having a seal portion formed along each of both ends facing each other, and a back seal portion formed on the back side so as to extend from one end of the both ends to the other end, the packaging bag having the following: having a first opening auxiliary line and a second opening auxiliary line extending from the vicinity of the one end of the back seal portion toward the other end to induce a tear so as to form an opening on the front side or the back side; The first opening auxiliary line extends from near the one end of the back seal portion to the boundary between the first side surface and the front surface or the back surface, and further extends between the first side surface and the front surface or the back surface. The second unsealing aid front extends from near the one end of the back seal portion to the boundary between the second side surface and the front surface or the back surface, and further , extending along the boundary between the second side surface and the front surface or the rear surface.
In one embodiment, in the back seal portion, the first opening auxiliary line and the second opening auxiliary line have a shape that tapers toward a direction in which the tear is guided and are arranged along the direction. Contains multiple unit extension lines.
In one embodiment, the first opening auxiliary line may include any suitable number of lines extending along each other between the back seal portion and the boundary between the first side surface and the front surface or the back surface. Consists of opening auxiliary lines.
In one embodiment, the second opening auxiliary line may include any suitable number of lines extending from the back seal portion to the boundary between the second side surface and the front surface or the back surface. Consists of opening auxiliary lines.
In one embodiment, a corner is formed at a boundary between the seal portion and the back surface, a boundary between the back surface and the first side surface, and a boundary between the back surface and the second side surface, and the corner portion In at least one, the first opening assistance line and/or the second opening assistance line intersects the corner approximately perpendicularly.
In one embodiment, at the boundary between the first side surface and the front surface or the rear surface, the first opening assistance line has a shape that tapers along the boundary toward the direction in which the tear is guided, and It includes a plurality of unit auxiliary lines arranged along the direction.
In one embodiment, at the boundary between the second side surface and the front surface or the rear surface, the second opening auxiliary line has a shape that tapers along the boundary toward the direction in which the tear is induced, and It includes a plurality of unit auxiliary lines arranged along the direction.
In one embodiment, at the boundary between the first side surface and the front surface or the back surface, the first opening auxiliary line is configured by a plurality of opening auxiliary lines extending along the boundary, The auxiliary line is a wavy line or a broken line.
In one embodiment, the second opening auxiliary line is configured by a plurality of opening auxiliary lines extending along the boundary at the boundary between the second side surface and the front surface or the back surface, and The auxiliary line is a wavy line or a broken line.
In one embodiment, the back seal part has a notch or notch near the ends of the first opening assistance line and the second opening assistance line on the side of the back seal part.
In one embodiment, the film constituting the packaging bag has a base material and a barrier layer laminated on the base material, and the first opening aid line and the second opening aid line are attached to the base material. An opening auxiliary line is formed.

According to the present invention, a packaging bag that can be easily opened and the contents can be easily taken out after opening can be provided.

(a) is a schematic plan view of a packaging bag according to one embodiment of the present invention when viewed from the back side, and (b) is a schematic plan view of a packaging bag according to one embodiment of the present invention when viewed from the front side. FIG. FIG. 2 is a schematic plan view showing a bag-making film used for manufacturing the packaging bag shown in FIG. 1. FIG. FIG. 2 is an enlarged plan view showing an example of opening assistance lines provided on the packaging bag in one embodiment of the present invention. FIG. 2 is a schematic plan view showing another example of a bag-making film used for manufacturing the packaging bag shown in FIG. 1. FIG. (a) is a schematic plan view of a packaging bag according to one embodiment of the present invention when viewed from the back side, and (b) is a schematic plan view of a packaging bag according to one embodiment of the present invention when viewed from the front side. FIG. 6 is a schematic plan view showing a bag-making film used for manufacturing the packaging bag shown in FIG. 5. FIG. 6 is a schematic plan view showing another example of a bag-making film used for manufacturing the packaging bag shown in FIG. 5. FIG. 6 is a schematic plan view showing another example of a bag-making film used for manufacturing the packaging bag shown in FIG. 5. FIG.

Hereinafter, embodiments of the present invention will be described in detail based on FIGS. 1 to 8.

A. First Embodiment FIG. 1(a) is a schematic perspective view of a packaging bag 100 according to one embodiment of the present invention when viewed from the back side 21, and FIG. 1(b) is a schematic perspective view of the packaging bag 100 according to one embodiment of the present invention. It is a schematic perspective view when seen from. FIG. 2 is a bag-making film 110 used for manufacturing the packaging bag 100, and is a developed view of the packaging bag 100. The packaging bag 100 has a front side 20 and a back side 21 facing each other, and a first side 22 and a second side 23 formed between the front side 20 and the back side 21 and facing each other. The packaging bag 100 is a so-called gusset type packaging bag. The packaging bag 100 is typically obtained by bag-making processing a single bag-making film 110. The packaging bag 100 includes a first seal portion 11 and a second seal portion 12 formed by sealing a front surface 20 and a back surface 21, and a back seal portion 13 (spine pasting) formed on the back surface. has. The first seal portion 11 is formed along one end 11a of both ends facing each other, and the second seal portion 12 is formed along the other end 12a. The back seal portion 13 is formed on the back surface 21 so as to extend from one end 11a to the other end 12a. Typically, the back seal portion 13 is formed near the center of the back surface 21 and is folded toward the second side surface 23 so as to be in contact with the back surface 21 (so as to be substantially parallel to the back surface 21).

In addition, in FIG. 2 (and FIG. 5 described later), lines 21a, 22a, 22b, 22c, 23a, 23b, 23c, 21a', 22a', 22b', 22c', 23a', 23b' represented by dotted lines , 23c' are portions that are folded during the bag manufacturing process, and are portions that become corners of the packaging bag. In this specification, for convenience, the direction in which the corner extends is defined as the length direction.

The packaging bag 100 has a first opening auxiliary line 30 and a second opening auxiliary line 40 extending from near one end 11a of the back seal portion 13 toward the other end 12a. In FIG. 1, the first opening assistance line 30 and the second opening assistance line 40 are shown as thick lines. The first opening auxiliary line 30 and the second opening auxiliary line 40 guide a tear so as to form an opening on the back surface 21 when the packaging bag 100 is torn from the back seal portion 13. Typically, the first tear aid line 30 and the second tear aid line 40 can cause the tear to progress along their shapes. In addition, the opening assistance lines written with "first" or "second", such as the first opening assistance line and the second opening assistance line, are multiple opening assistance lines (secondary opening assistance lines). line) and/or a set of a plurality of unit auxiliary lines (details will be described later).

The first opening aid line 30 extends from near one end 11a of the back seal portion 13 to the boundary 22a between the first side surface 22 and the back surface 21, and further extends along the boundary 22a toward the other end 12a. In one embodiment, the first opening aid line 30 may be formed in a linear shape including a curve between the back seal portion 13 and the boundary 22a (ie, on the back surface 21). The first opening aid line 30 may extend along the boundary 22a to the other end 12a, or may not extend to the other end 12a of the boundary 22a, and is formed so as to stop the induction of a tear on the boundary 22a. Good too.

"Along the boundary" refers to a form in which the first opening assistance line (and the second opening assistance line) exists on the boundary, and a form in which the first opening assistance line (and the second opening assistance line) exists near the boundary. This is a concept that includes the form in which In one embodiment, as shown in FIGS. 1 and 2, the first opening assistance line and the second opening assistance line are provided such that at least a portion thereof is located on a corner of the packaging bag. In this way, damage to the contents can be prevented. Such an embodiment is particularly effective when the contents are packaged with few gaps. In another embodiment, the first opening auxiliary line and the second opening auxiliary line are provided near a corner of the packaging bag so that the opening auxiliary line and the corner do not intersect. In this way, it is possible to more effectively prevent the tear from deviating from the first opening assistance line and the second opening assistance line during opening. The shortest distance between the first opening assistance line and the second opening assistance line and the corner is, for example, 1 mm to 5 mm. Moreover, in this embodiment, it is preferable that the first opening assistance line and the second opening assistance line are provided on the opening side with respect to the adjacent corners. For example, when the packaging bag is a gusset bag, it is preferable to provide it on the front or back side.

The second opening aid line 40 extends from near one end 11a of the back seal portion 13 to the boundary 23a between the second side surface 23 and the back surface 21, and further extends along the boundary 23a toward the other end 12a. It is preferable that the ends of the first opening auxiliary line 30 and the second opening auxiliary line 40 on the back seal portion 13 side are at the same position (same position when used as a packaging bag). In one embodiment, the second opening assistance line 40 may be formed in a linear shape including a curve between the vicinity of one end 11a of the back seal portion 13 and the boundary 23a (ie, the back surface 21). The second opening aid line 40 may extend along the boundary 23a to the other end 12a, or may not extend to the other end 12a of the boundary 23a, and is formed so as to stop the induction of a tear on the boundary 23a. Good too. It is preferable that the first opening auxiliary line 30 and the second opening auxiliary line 40 have the same length.

According to the present invention, it is possible to open the back surface 21 (front surface 20' in the second embodiment described later), which is the wide-area side of the contents, over a wide area, and it is possible to easily open the bag without interfering with the contents. To obtain a packaging bag which can be opened and whose contents can be easily taken out after opening. Furthermore, the boundaries 22a and 23a between the back surface 21 and the side surfaces 22 and 23 may become corners when the bag-making film 110 is folded back to form the packaging bag 100, but in the present invention, By providing the line 30 and the second opening auxiliary line 40 at the corner, the opening is excellent, and the first opening auxiliary line 30 and the second opening auxiliary line 40 are difficult to see and have a good design. A packaging bag with excellent properties can be obtained.

Between the back seal part 13 and the boundary 22a between the first side surface 22 and the back surface 21, the first opening auxiliary line 30 may be composed only of a curved line or may be composed only of a straight line. , may be composed of curves and straight lines. Further, the second opening auxiliary line 40 between the back seal portion 13 and the boundary 23a between the second side surface 23 and the back surface 21 may be composed of only a curved line, or may be composed only of a straight line. It may be composed of curved lines and straight lines.

In one embodiment, in the back seal portion 13, the first opening assistance line 30 and the second opening assistance line 40 have a shape that tapers toward the tear guiding direction and are arranged along the direction. Contains multiple unit extension lines. Specifically, as shown in FIG. 2, in the back seal portion 13, the first opening auxiliary line 30 extends from near one end 11a of the back seal portion 13 to the boundary 22a between the first side surface 22 and the back surface 21. The second opening auxiliary line 40 includes a plurality of unit auxiliary lines 31a that have a V-shape that tapers toward the guiding direction of the directed tear and are arranged along the guiding direction and a direction orthogonal to the guiding direction. , which have a V-shape tapering from the vicinity of one end 11a of the back seal portion 13 toward the boundary 23a between the second side surface 23 and the back surface 21 in the direction in which the cracks are guided, and are arranged along the direction. It includes a plurality of unit auxiliary lines 41a. By configuring the first opening auxiliary line 30 and the second opening auxiliary line 40 in the back seal part 13 in this way, the transition of the tear from the back seal part 13 to the outside of the back seal part 13 can be made smooth. It is possible to prevent the tear from deviating from the opening aid line. The number of unit auxiliary lines in the back seal portion 13 and the interval between adjacent unit auxiliary lines can be appropriately set depending on the use of the packaging bag 100, the strength of the film, etc. It is preferable that 2 to 10 unit auxiliary lines 31a, 41a are arranged in the direction in which the fissures are guided, and more preferably that 3 to 5 unit auxiliary lines are arranged. In addition, the unit auxiliary lines 31a, 41a are 2 to 10 (if the unit auxiliary lines form a V-shape, 1 to 5 sets of V-shapes are formed in the direction perpendicular to the guide direction of the tear It is preferable that the unit auxiliary lines are arranged in a V-shape, and 4 to 6 lines (if the unit auxiliary lines form a V-shape, two to three sets of V-shapes are arranged). It is more preferable.

The unit auxiliary lines in the back seal portion 13 may form the above-mentioned V-shape as shown in FIG. 2, and may also form a shape of overlapping V-shapes as shown in FIG. 3. Further, other examples of the shape of the unit auxiliary line in the back seal portion 13 include a V-shape, a U-shape, a Y-shape, and the like. The unit auxiliary line may be symmetrical or asymmetrical.

In one embodiment, a notch or notch (notch 13a in the illustrated example) is formed in the back seal portion 13 in the vicinity of the back seal portion side end portions of the first opening assistance line and the second opening assistance line. be done. By forming the notch or notch, the opening start position can be easily recognized and the opening start position can be easily grasped.

In one embodiment, the first opening aid line 30 may be configured by a plurality of opening aid lines 33 extending along each other between the back seal portion 13 and the boundary 22a (namely, the back surface 21). Further, between the back seal portion 13 and the boundary 23a (ie, on the back surface 21), the second opening auxiliary line 40 may be constituted by a plurality of opening auxiliary lines 43 extending along each other. By configuring the first opening auxiliary line 30 and the second opening auxiliary line 40 in this way, it is possible to prevent the tear from deviating from the opening auxiliary line. The interval between adjacent opening auxiliary lines is not particularly limited, and can be appropriately set depending on the size of the packaging bag 100. The number of opening auxiliary lines 33 and 43 on the back surface 21 is 2 to 6, and more preferably 3 to 5, respectively. In the illustrated example, the first opening assistance line 30 and the second opening assistance line 40 are each constituted by three opening assistance lines extending in the direction along each other. On the back surface 21, each of the opening assistance lines 33 and 43 constituting the first opening assistance line 30 and the second opening assistance line 40 is a broken line, a dotted line, a wavy line, in addition to an uninterrupted line as shown in FIG. Other shapes may also be used.

In one embodiment, the first opening assistance line and/or the second opening assistance line intersects the corner portion approximately perpendicularly. "The first opening assistance line and/or the second opening assistance line intersects substantially perpendicularly to the corner" refers to the state in which the packaging bag is unfolded (that is, the state in which the bag-making film 110 is laid flat). ) means that the first opening auxiliary line and/or the second opening auxiliary line and the straight line defined at the corner are substantially perpendicular.

Hereinafter, in the first embodiment, an embodiment in which the first opening assistance line intersects the corner approximately perpendicularly, and an embodiment in which the second opening assistance line intersects the corner approximately perpendicularly will be specifically described. In the first embodiment, the boundary 21a between the back seal portion 13 and the back surface 21 corresponds to the corner where the first opening assistance line and the second opening assistance line intersect.

In one embodiment, the angle A at which the first opening aid line 30 intersects with the boundary 21a between the back seal portion 13 and the back surface 21 is 90°±20°. By forming the first opening auxiliary line 30 in this manner, it is possible to prevent the tear from deviating toward the boundary 21a. As used herein, the term "intersecting angle" means the angle defined by the tangent at the intersection when one or both of the intersecting lines are curved lines. Moreover, the "intersecting angle" is an angle measured with the packaging bag unfolded (that is, with the bag-making film 110 laid flat). The angle A is preferably 90°±10°, more preferably 90°±5°, even more preferably 90°±2°, particularly preferably 90°±1°, and most preferably is 90°. Within this range, the above effect becomes more significant.

In one embodiment, the angle A' where the second opening aid line 40 intersects with the boundary 21a between the back seal portion 13 and the back surface 21 is 90°±20°. By forming the second opening auxiliary line 40 in this manner, it is possible to prevent the tear from deviating toward the boundary 21a'. The angle A' is preferably 90°±10°, more preferably 90°±5°, still more preferably 90°±2°, particularly preferably 90°±1°, and most preferably Preferably it is 90°. Within this range, the above effect becomes more significant.

In one embodiment, the first opening aid line 30 has a shape that tapers in a tear guiding direction along the boundary 22a between the first side surface 22 and the back surface 21, and in this direction. It includes a plurality of unit auxiliary lines 32a arranged along. Furthermore, in the present embodiment, the second opening auxiliary line 40 has a shape that tapers in the direction in which the tear is induced along the boundary 23a at the boundary 23a between the second side surface 23 and the back surface 21, and in this direction. It may include a plurality of unit auxiliary lines 42a arranged along. Specifically, as shown in FIG. 2, the first opening auxiliary line 30 has a V-shape that tapers toward the guide direction of the tear along the boundary 22a, and also extends in the guide direction and in a direction perpendicular to the guide direction. It may include a plurality of unit auxiliary lines 32a arranged along. Further, the second opening auxiliary line 40 has a V-shape that tapers toward the tear guiding direction along the boundary 23a, and may include a plurality of unit auxiliary lines 42a arranged along the direction. The number of unit auxiliary lines in the boundary 22a and the boundary 23a and the interval between adjacent unit auxiliary lines can be appropriately set depending on the use of the packaging bag 100, the strength of the film, etc. There are 4 to 12 unit auxiliary lines 32a, 42a (if the unit auxiliary lines form a V-shape, 2 to 6 sets forming a V-shape) in a direction perpendicular to the direction in which the tear is guided. It is preferable that 6 to 10 unit auxiliary lines are arranged (if the unit auxiliary lines form a V-shape, 3 to 5 sets forming a V-shape). More preferred. Generally, a packaging bag having an auxiliary opening line can be manufactured by forming an auxiliary opening line on a film and then bag-making the film, and the boundaries 22a and 23a can be corners, but the corners are The position of each packaging bag may shift. In the embodiment described above, by arranging a plurality of unit auxiliary lines 32a, 42a in a direction perpendicular to the tear guiding direction, even if the position of the corner is not stable for each packaging bag, the unit auxiliary lines 32a, 42a, 42a can be placed at a corner (at least near the corner). As a result, a packaging bag that is easy to open can be obtained.

The shape of the unit auxiliary lines at the boundaries 22a and 23a may form the above-described V-shape as shown in FIG. 2, or may form a shape in which the V-shapes overlap as shown in FIG. 3. Further, other examples of the shape of the unit auxiliary lines at the boundaries 22a and 23a include a V-shape, a U-shape, a Y-shape, and the like. The unit auxiliary line may be symmetrical or asymmetrical.

In another embodiment, as shown in FIG. 4, the first opening assistance line 30 is a plurality of opening assistance lines extending along the boundary 22a between the first side surface 22 and the back surface 21. 32b. Furthermore, in the present embodiment, the second opening auxiliary line 40 is composed of any appropriate number of opening auxiliary lines 42b extending along the boundary 23a between the second side surface 23 and the back surface 21. Ru. The number of opening auxiliary lines 32b and 42b arranged at the boundary 22a and the boundary 23a is 2 to 6, and more preferably 3 to 5, respectively. The opening aid lines 32b, 42b may have other shapes such as a broken line, a dotted line, a wavy line, etc., in addition to an uninterrupted line as shown in FIG. Preferably, it is a continuous line.
In this embodiment, preferably, as shown in FIG. 3, the opening auxiliary line 32b and the opening auxiliary line 42b are wavy lines or polygonal lines, and the distance between adjacent opening auxiliary lines is indefinite. Ru. In this way, it is possible to prevent the tear from deviating from the opening aid line when the package is opened. More specifically, if a tear along a predetermined opening aid line (for example, a central opening aid line) deviates from the opening aid line, the tear will be separated from the adjacent tear at the point where the opening aid line approaches. It is easy to move to the opening aid line, preventing deviation and allowing smooth opening. Furthermore, the opening line can be formed in a nearly linear shape, which is advantageous in terms of appearance.

When the opening auxiliary line 32b and the opening auxiliary line 42b are wavy lines or polygonal lines, and the distance between adjacent opening auxiliary lines is indefinite, the point where the distance between adjacent opening auxiliary lines is the closest The distance between the opening auxiliary lines is preferably 1 mm to 5 mm, more preferably 2 mm to 4 mm. Further, the distance between adjacent opening auxiliary lines at the farthest point is preferably 2 mm to 8 mm, more preferably 3 mm to 7 mm.

The packaging bag 100 can typically be obtained by folding a single film (bag-making film 110) into a bag shape and sealing the ends with the films stacked one on top of the other. Specifically, a set of sides of a rectangular film are overlapped and sealed to form the back seal part 13, and one of the two sides of the film perpendicular to the set of sides is sealed to form the back seal part 13. The packaging bag 100 can be obtained by forming one seal portion 11 and sealing the other side to form a second seal portion 12.

The above-mentioned film (bag-making film) typically includes a base film serving as the outermost layer of the bag-making film, and a functional layer laminated on the base film depending on the purpose. As the base film, resin films such as polyester, polyamide, polypropylene, polycarbonate, cellophane, etc. can be used. Preferably, a stretched film obtained by biaxially stretching these resin films is used. The base film may be subjected to any appropriate printing.

Examples of functional layers include barrier layers and fusion layers. The barrier layer can be formed by, for example, depositing an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, or zirconium oxide on a base film, or by bonding a metal foil such as aluminum to a base film. It can be formed by By using a film having the above barrier layer as a film constituting a packaging bag, gas barrier properties, water vapor barrier properties, mechanical strength, bending resistance, puncture resistance, impact resistance, abrasion resistance, cold resistance, It can improve heat resistance, chemical resistance, light shielding properties, etc., and prevent the contents from deteriorating. Examples of the adhesive layer include high-pressure low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene- Typical examples include acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid copolymer (EMMA), ethylene-vinyl alcohol copolymer (EVOH), polyacrylonitrile (PAN), and polyethylene terephthalate (PET). It can be formed by applying a resin material such as polyester, or by bonding and laminating resin films made of these resin materials. By providing such a fusion layer as the innermost layer, the edges of the film can be sealed by heat sealing.

The first opening auxiliary line 30 and the second opening auxiliary line 40 may be parts that are thinner than other parts of the bag-making film. Such opening aid lines are typically formed by half-cutting the bag-making film by laser irradiation (for example, carbon dioxide laser irradiation).

In one embodiment, the first opening auxiliary line 30 and the second opening auxiliary line 40 may be formed on the base film. If a packaging bag is constructed by forming a barrier layer on a base film provided with the first opening auxiliary line 30 and the second opening auxiliary line 40, a packaging bag with particularly excellent opening and barrier properties can be obtained. be able to. Such a packaging bag is suitable as a packaging bag for food (eg, confectionery).

B. Second Embodiment FIG. 5(a) is a schematic perspective view of a packaging bag 100' according to one embodiment of the present invention when viewed from the back side 21', and FIG. 5(b) is a schematic perspective view of a packaging bag 100' according to an embodiment of the present invention. It is a schematic perspective view when seen from the front surface 20' side. FIG. 6 is a bag-making film 110' used for manufacturing the packaging bag 100', and is a developed view of the packaging bag 100'. Similar to the packaging bag 100 described above, the packaging bag 100' includes a front surface 20' and a back surface 21' facing each other, and a first side surface 22' and a first side surface 22' formed between the front surface 20' and the back surface 21' and facing each other. and a second side surface 23'. The packaging bag 100' has a first seal part 11' and a second seal part 12' formed by sealing a front face 20' and a back face 21', and a back seal part 13' formed on the back face. and has. The first seal part 11' is formed along one end 11a' of both ends facing each other, and the second seal part 12' is formed along the other end 12a'. The back seal portion 13' is formed on the back surface 21' so as to extend from one end 11a' to the other end 12a'.

A packaging bag 100 (FIGS. 1 and 2) in which a first opening auxiliary line 30 and a second opening auxiliary line 40 are arranged at boundaries 22a and 23a between the back surface 21 and the side surfaces 22 and 23, and FIGS. 5 and 6 The packaging bag 100' is different from the packaging bag 100' shown in FIG. It is at the point where the auxiliary line 40' is located. Differences associated with this form are explained below. Regarding the specific forms of the other parts and each component, the forms described in Section A above may be adopted as appropriate.

The packaging bag 100' has a first opening auxiliary line 30' and a second opening auxiliary line 40' extending from near one end 11a' of the back seal portion 13' toward the other end 12a'. In FIG. 5, the first opening assistance line 30' and the second opening assistance line 40' are shown as thick lines. The first opening auxiliary line 30' and the second opening auxiliary line 40' guide the tear so as to form an opening on the front surface 20' when the packaging bag 100' is torn from the back seal portion 13'. .

The first opening auxiliary line 30' extends from near one end 11a' of the back seal portion 13' to the boundary 22c' between the first side surface 22' and the front surface 20', and further extends along the boundary 22c'. It extends toward the end 12a'. In one embodiment, the first opening aid line 30' is a curved line between the back seal portion 13' and the boundary 22c' (i.e., the back surface 21' and the first side surface 22'). It can be formed into a shape.

The second opening auxiliary line 40' extends from near one end 11a' of the back seal portion 13' to the boundary 23c' between the second side surface 23' and the front surface 20', and further extends along the boundary 23c'. It extends toward the end 12a'. In one embodiment, the second opening aid line 40' is a curved line between the back seal portion 13' and the boundary 23c' (i.e., the back surface 21' and the first side surface 22'). It can be formed into a shape.

Between the back seal portion 13' and the boundary 22c' between the first side surface 22' and the front surface 20', the first opening auxiliary line 30' may be composed only of a curved line, or may be composed only of a straight line. It may be composed of curved lines and straight lines. Moreover, the second opening auxiliary line 40' may be composed of only a curved line or only a straight line between the back seal part 13' and the boundary 23c' between the second side surface 23' and the front surface 20'. It may be composed of curved lines and straight lines.

In one embodiment, between the back seal portion 13' and the boundary 22c' (i.e., the back surface 21' and the first side surface 22'), the first opening aid line 30' is a plurality of lines extending along each other. It can be constituted by a book (preferably 2 to 6, more preferably 3 to 5) opening aid lines 33'. Moreover, between the back seal part 13' and the boundary 23c' (that is, the back surface 21 and the second side surface 23'), there are a plurality of second opening auxiliary lines 40' (preferably two lines) extending along each other. 6, more preferably 3 to 5) opening auxiliary lines 43'.

As mentioned above, the first opening assistance line and/or the second opening assistance line may intersect the corner portion approximately perpendicularly. Hereinafter, in the second embodiment, an embodiment in which the first opening assistance line intersects the corner approximately perpendicularly, and an embodiment in which the second opening assistance line intersects the corner approximately perpendicularly will be specifically described. In addition, in the second embodiment, a boundary 21a' between the back seal portion 13' and the back surface 21'; a boundary 22a' between the back surface 21' and the first side surface 22': a fold in the first side surface 21'; A line 22b' that is a line; a line 23b' that is a fold line in the second side surface 23'; and a boundary 23a' between the back surface 21' and the second side surface 23' are the first opening aid line and the second opening line. This may correspond to the corner that intersects with the auxiliary line.

In one embodiment, the angle A at which the first opening aid line 30' and the corner intersect is 90°±20°. The angle A is preferably 90°±10°, more preferably 90°±5°, even more preferably 90°±2°, particularly preferably 90°±1°, and most preferably is 90°. In one embodiment, as shown in FIG. 7, the first opening aid line 30' is a curved line from the back seal portion 13' to the boundary 22c' between the first side surface 22' and the front surface 20'. and a straight line, and the straight line portion of the first opening auxiliary line 30' intersects with the corner. At this time, the angle A is preferably 90°±20°, more preferably 90°±10°, still more preferably 90°±5°, and even more preferably 90°±2°. , particularly preferably 90°±1°, most preferably 90°. In addition, in a plurality of corners, the angle at which the first opening auxiliary line 30' (and the second opening auxiliary line 40' described below) and the corner intersect may be the same or different. .

In one embodiment, the angle A' at which the second opening aid line 40' intersects the corner is 90°±20°. The angle A' is preferably 90°±10°, more preferably 90°±5°, still more preferably 90°±2°, particularly preferably 90°±1°, and most preferably Preferably it is 90°. In one embodiment, as shown in FIG. 7, the second opening auxiliary line 40' is a curved line between the back seal portion 13' and the boundary 23c' between the second side surface 23' and the front surface 20'. and a straight line, and the straight line portion of the second opening auxiliary line 40' intersects with the corner. At this time, the angle A' is preferably 90°±20°, more preferably 90°±10°, still more preferably 90°±5°, and still more preferably 90°±2°. The angle is particularly preferably 90°±1°, and most preferably 90°.

In one embodiment, as shown in FIGS. 6 and 8, the first opening aid line 30' is located along the boundary 22c' between the first side surface 22' and the front surface 20'. It includes a plurality of unit auxiliary lines 32b' that have a shape that tapers toward the direction in which the tear is induced and are arranged along the direction. Further, the second opening auxiliary line 40' has a shape that tapers in the direction in which the tear is guided along the boundary 23c' between the second side surface 23' and the front surface 20', and in this direction. It may include a plurality of unit auxiliary lines 42b' arranged along.

In another embodiment, as shown in FIG. 8, a plurality of first opening aid lines 30' extend along the boundary 22c' between the first side surface 22' and the front surface 20'. It is constituted by the book opening auxiliary line 32b'. In the present embodiment, the second opening auxiliary line 40' is a plurality of opening auxiliary lines 42b' extending along the boundary 23c' between the second side surface 23' and the front surface 20'. Consisted of. The number of opening auxiliary lines 32b' and 42b' arranged at the boundary 22c' and the boundary 23c' is 2 to 6, and more preferably 3 to 5, respectively. The opening aid lines 32b', 42b' may have other shapes such as a broken line, a dotted line, a wavy line, etc., in addition to an uninterrupted line as shown in FIG. Preferably, it is a continuous line.

Preferably, in the embodiment shown in FIG. 8, the opening auxiliary lines 32b', 42b' and the opening auxiliary lines 32b', 42b' are wavy lines or broken lines, and the distance between adjacent opening auxiliary lines is indefinite. It is configured as follows. In this way, it is possible to prevent the tear from deviating from the opening aid line when the package is opened.

It goes without saying that the elements described in this specification can be combined as appropriate. For example, a form that is a combination of the form shown in FIG. 7 and the form shown in FIG. A preferable example is a configuration in which the first opening assistance line and/or the second opening assistance line is a wavy line or a polygonal line at the boundary with the front surface or the boundary between the side surface and the back surface.

The packaging bag of the present invention is suitably used as a packaging bag for storing foods and the like.

11 First seal part 12 Second seal part 13 Back seal part 20 Front surface 21 Back surface 22 First side surface 23 Second side surface 30 First opening auxiliary line 40 Second opening auxiliary line 100 Packaging bag

Claims (6)

A front surface and a back surface facing each other, and first and second side surfaces formed between the front surface and the back surface and facing each other,
a seal portion formed along each of opposite ends by sealing the front surface and the back surface; a back seal portion formed on the back surface so as to extend from one end to the other end of the both ends;
A packaging bag having
A first opening aid line and a second opening assisting line extending from near the one end of the back seal portion toward the other end are provided to guide a tear to form an opening on the front surface or the back surface. ,
The first opening auxiliary line extends from near the one end of the back seal portion to the boundary between the first side surface and the front surface or the back surface, and further extends between the first side surface and the front surface or the back surface. extending toward the other end along the boundary of
The second opening auxiliary line extends from near the one end of the back seal portion to the boundary between the second side surface and the front surface or the back surface, and further extends between the second side surface and the front surface or the back surface. extends along the border of
The first opening auxiliary line is constituted by a plurality of opening auxiliary lines extending along each other between the back seal part and the boundary between the first side surface and the front surface or the back surface,
The second opening auxiliary line is constituted by a plurality of opening auxiliary lines extending along each other between the back seal part and the boundary between the second side surface and the front surface or the back surface,
Corners are formed at boundaries between the back seal portion and the back surface, between the back surface and the first side surface, and at the boundaries between the back surface and the second side surface,
At least one of the corners, the first opening assistance line and/or the second opening assistance line intersects the corner approximately perpendicularly,
The number of the first opening auxiliary line and the second opening auxiliary line is 3 or more, respectively,
At the boundary between the first side surface and the front surface or the back surface, the first opening auxiliary line is constituted by a plurality of opening auxiliary lines extending along the boundary, and the opening auxiliary line is a wavy line or It is a polygonal line,
At the boundary between the second side surface and the front surface or the back surface, the second opening auxiliary line is constituted by a plurality of opening auxiliary lines extending along the boundary, and the opening auxiliary line is a wavy line or It is a polygonal line,
packaging bag. In the back seal portion, the first opening auxiliary line and the second opening auxiliary line have a shape that tapers toward the direction in which the tear is guided, and a plurality of unit auxiliary lines are arranged along the direction. The packaging bag according to claim 1, comprising: At the boundary between the first side surface and the front surface or the rear surface, the first opening auxiliary line has a shape that tapers along the boundary in a direction in which the tear is induced, and is arranged along the direction. The packaging bag according to claim 1 or 2, comprising a plurality of unit auxiliary lines. At the boundary between the second side surface and the front surface or the rear surface, the second opening auxiliary line has a shape that tapers along the boundary toward the direction in which the tear is induced, and is arranged along the direction. The packaging bag according to any one of claims 1 to 3, comprising a plurality of unit auxiliary lines. The package according to any one of claims 1 to 4 , wherein the back seal part has a notch or notch near the back seal part side ends of the first opening auxiliary line and the second opening auxiliary line. bag. The film constituting the packaging bag has a base material and a barrier layer laminated on the base material,
The first opening auxiliary line and the second opening auxiliary line are formed on the base material,
The packaging bag according to any one of claims 1 to 5 .

Images