JP6946866B2 - bag - Google Patents

Description

The present invention relates to a bag provided with an accommodating portion for accommodating the contents.

As a bag for accommodating the contents, a bag made of a film-like packaging material containing a plastic material such as PET or nylon is used. Such a bag is configured by heat-welding the inner surfaces of the packaging materials to each other to form a sealing portion, for example, as described in Patent Document 1. In this case, the accommodating portion for accommodating the contents is defined as a space surrounded by the packaging material and the sealing portion.

A bag made of a packaging material is usually provided with an opening means for breaking the seal to facilitate opening the bag. For example, in Patent Document 1, it is proposed to provide an opening means along the gassho seal portion in the vicinity of the gassho seal portion of the bag.

Japanese Unexamined Patent Publication No. 10-250764

When the user breaks the bag along the opening means, an opening is formed in the bag. If the bag can be broken linearly from one end to the other, the size of the opening becomes large and the contents contained in the bag can be easily taken out.

An object of the present invention is to provide a bag provided with an opening means capable of effectively solving such a problem.

The present invention is a bag formed of a packaging material and having a front surface and a back surface, wherein the packaging material is a first base material layer containing a biaxially stretched plastic film and the bag rather than the first base material layer. Between the second base material layer located on the outer surface side and containing paper, the sealant layer located on the inner surface side of the bag with respect to the first base material layer, and the first base material layer and the sealant layer. The bag has an adhesive layer located, and the bag has a first end portion, a second end portion facing the first end portion in a first direction, and the first end portion to the second end portion. The inner surfaces of the packaging materials are joined to each other at the first end portion, the second end portion, and the gassho portion with the gassho portion extending along the first direction and on which the packaging material is overlapped on the surface side. A seal portion and an easily broken portion provided on at least one of the front surface and the back surface and extending from the first end portion to the second end portion along the first direction so as not to intersect with the gassho portion. The easily broken portion is a bag having a plurality of partially penetrating portions that penetrate at least the first base material layer and the second base material layer and do not penetrate the sealant layer.

The bag according to the invention includes the packaging material folded between the front surface and the back surface, and further includes a side gusset portion extending from the first end portion to the second end portion along the first direction. The easily broken portion may extend along the side gusset portion at least partially on the gassho portion side of the side gusset portion.

The bag according to the present invention has an adhesive portion for adhering a portion of the packaging material folded between the front surface and the back surface of the side gusset portion, which is located on the front surface side and the back surface side. Further may be provided.

In the bag according to the present invention, the second base material layer may be located on the wall surface of the partial penetration portion on the central side of the partial penetration portion with respect to the first base material layer.

In the bag according to the present invention, the cross-sectional area of the partial penetrating portion may increase from the second base material layer side toward the first base material layer side.

In the bag according to the present invention, the tensile strength of the first base material layer of the packaging material in the first direction is larger than the tensile strength of the first base material layer in the second direction orthogonal to the first direction. May be good.

In the bag according to the present invention, the easily broken portion is overlapped with the first easily broken portion provided on the front surface and the first easily broken portion when viewed along the normal direction of the surface. It may have a second easily broken portion provided in.

According to the present invention, the user can easily break the bag along the easily broken portion. Therefore, the ease of taking out the contents can be improved.

It is a top view which shows the bag in embodiment of this invention. It is sectional drawing which looked at the bag of FIG. 1 from the direction of II-II. It is sectional drawing which shows an example of the layer structure of the packaging material which comprises a bag. It is sectional drawing which shows an example of the layer structure of the packaging material which comprises a bag. It is a top view which shows an example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. It is a top view which shows the other example of the easily broken part. FIG. 5 is a cross-sectional view of the easily broken portion of FIG. 5 as viewed from the VII-VII direction. It is sectional drawing which shows the partial penetration part of the easily broken part enlarged. It is a top view which shows the state of opening the bag shown in FIG. It is a top view which shows the bag in the opened state. It is a top view which shows one modification of a bag. It is sectional drawing which looked at the bag of FIG. 11 from the XII-XII direction. It is a top view which shows one modification of a bag.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 10. In the drawings attached to the present specification, the scale, aspect ratio, etc. are appropriately changed from those of the actual product and exaggerated for the convenience of illustration and comprehension.

In addition, as used in the present specification, the terms such as "parallel", "orthogonal", and "same" and the values of length and angle that specify the shape and geometric conditions and their degrees are strictly used. Without being bound by meaning, we will interpret it including the range in which similar functions can be expected.

Bag FIG. 1 is a plan view showing a bag 10 containing the contents 19. Further, FIG. 2 is a cross-sectional view of the bag 10 of FIG. 1 as viewed from the II-II direction. The bag 10 is formed by partially joining the inner surfaces of the film-shaped packaging material 30 to each other. The bag 10 includes a front surface 11 and a back surface 12 composed of the packaging material 30. As shown in FIG. 2, both the front surface 11 and the back surface 12 are formed by folding back one packaging material 30. Although not shown, the number of packaging materials 30 constituting the bag 10 is not limited to one, and the bag 10 may be composed of a plurality of packaging materials 30.

As shown in FIG. 1, the bag 10 has a first end portion 13, a second end portion 14 facing the first end portion 13 in the first direction D1, and a first end portion 13 to a second end portion 14. A pair of side end portions 15 extending along the first direction D1 are provided. The first direction D1 is a transport direction of the packaging material 30 when the bag 10 is produced from the film-shaped packaging material 30, and is a so-called MD (Machine Direction). In the example shown in FIG. 1, the first end portion 13 and the second end portion 14 extend in the second direction D2 orthogonal to the first direction D1, and therefore the bag 10 has a rectangular outer shape. .. Although not shown, the first end portion 13 and the second end portion 14 may extend in a direction inclined with respect to the second direction D2.

As shown in FIGS. 1 and 2, the bag 10 includes a gassho portion 17 extending from the first end portion 13 to the second end portion 14 along the first direction D1 and on which the packaging material 30 is overlapped. As described above, the bag 10 is a so-called pillow bag. The gassho portion 17 is located on the surface 11 side. In other words, in the present embodiment, the surface on the side where the gassho portion 17 is located is referred to as the surface 11.

The bag 10 includes a sealing portion for joining the inner surfaces of the film-shaped packaging material 30 to each other. The seal portion includes a first end seal portion 131 located at the first end portion, a second end seal portion 141 located at the second end portion 14, and a gassho portion seal portion 171 located at the gassho portion 17. .. The method for forming the sealing portion is not particularly limited as long as the inner surfaces of the packaging materials 30 can be joined to each other to seal the bag 10. For example, a seal portion may be formed by melting a part of the packaging material 30 by heating or the like and welding the inner surfaces of the packaging material 30 to each other. Alternatively, the sealing portion may be formed by adhering the inner surfaces of the packaging materials 30 to each other using an adhesive or the like.

As shown in FIG. 1, the gassho portion seal portion 171 extends in the first direction D1 from the first end portion seal portion 131 to the second end portion seal portion 141. As shown in FIG. 2, the gassho portion seal portion 171 may extend to the tip portion 172 of the gassho portion 17 in the second direction D2, or although not shown, the gassho portion seal portion 171 has a tip portion. It does not have to extend to 172. Further, the gassho portion seal portion 171 may extend to the base portion 173 of the gassho portion 17 in the second direction D2, or, although not shown, the gassho portion seal portion 171 does not extend to the base portion 173. May be good.

As shown in FIG. 1, the bag 10 includes an easily broken portion 20 extending from the first end portion 13 to the second end portion 14 along the first direction D1 so as not to intersect the gassho portion 17. The easily broken portion 20 is a portion configured to be easily broken as compared with other portions of the front surface 11 and the back surface 12. As shown in FIG. 2, the easily broken portion 20 overlaps the first easily broken portion 21 provided on the surface 11 and the first easily broken portion 21 when viewed along the normal direction of the surface 11. It has a second easily broken portion 22 provided on the back surface 12. By providing such an easily broken portion 20 in the bag 10, when the user breaks the bag 10, the break is likely to occur along the easily broken portion 20. The structure of the easily broken portion 20 will be described later.

An opening start portion 23 may be provided at a portion of the first end portion 13 or the second end portion 14 that overlaps with the easily broken portion 20 when viewed along the first direction D1. The opening start portion 23 is a portion that triggers the break when the bag 10 is broken along the easily breakable portion 20. The opening start portion 23 includes, for example, a notch formed in the first end portion 13 or the second end portion 14. The notch is a notch such as a V-shape or a notch.

The easily broken portion 20 such as the first easily broken portion 21 and the second easily broken portion 22 may be located in the vicinity of any one of the pair of side end portions 15. In the example shown in FIG. 2, the easily broken portion 20 is located in the vicinity of the left side end portion 15. In the following description, the direction from the gassho portion 17 to the easily broken portion 20 in the second direction D2 is referred to as the 21st direction, and the direction from the easily broken portion 20 to the gassho portion 17 in the second direction D2. Is also referred to as the 22nd direction.

As shown in FIG. 2, the easily broken portions 20 such as the first easily broken portion 21 and the second easily broken portion 22 are located at least partially outside the end portion 191 of the content 19 in the second direction D2. You may be. Further, the easily broken portion 20 may be located at least partially inside the end portion 191 of the content 19 in the second direction D2. In the example shown in FIG. 2, the easily broken portion 20 extends so as to straddle the end portion 191 of the content 19 in the second direction D2 when viewed along the normal direction of the surface 11. The "outside" means a side away from the center of the bag 10 in a plan view, and the "inside" means a side approaching the center of the bag 10 in a plan view.

The content 19 is, for example, a solid substance. The content 19 may be a solid substance that a person eats, such as food or a pharmaceutical product, or a solid substance that a person does not eat, such as a bath salt. Specific examples of the content 19 include plate-shaped chocolate, cookies, rice crackers, cheese, ham sausage, stationery, toys, cards and the like.

(Layer composition of packaging material)
Next, the layer structure of the packaging material 30 constituting the bag 10 will be described. FIG. 3 is a cross-sectional view showing an example of the layer structure of the packaging material 30.

The packaging material 30 includes at least the first base material layer 31 and the sealant layer 32. In the example shown in FIG. 3, the first base material layer 31 constitutes the outer surface 302 of the packaging material 30, and the sealant layer 32 constitutes the inner surface 301 of the packaging material 30. Further, the packaging material 30 may further include a printing layer 33 provided on the inner surface 301 side of the first base material layer 31, for example. Further, the packaging material 30 may further include a first adhesive layer 34 for adhering the first base material layer 31 and the sealant layer 32. As shown in FIG. 3, the thickness of the packaging material 30 in which the first base material layer 31 constitutes the outer surface 302 is, for example, 25 μm or more and 60 μm or less.

FIG. 4 is a cross-sectional view showing another example of the layer structure of the packaging material 30. The packaging material 30 may further include a second base material layer 35 located on the outer surface 302 side of the first base material layer 31. When the packaging material 30 includes the second base material layer 35, the printing layer 33 may be provided on the outer surface 302 side of the second base material layer 35 as shown in FIG. Further, the packaging material 30 may further include a second adhesive layer 36 that adheres the first base material layer 31 and the second base material layer 35. As shown in FIG. 4, the thickness of the packaging material 30 further including the second base material layer 35 in addition to the first base material layer 31 and the sealant layer 32 is, for example, 35 μm or more and 100 μm or less.

Hereinafter, each layer of the packaging material 30 will be described.

As the material constituting the first base material layer 31, for example, polyamide such as polyester or nylon such as polyethylene terephthalate or polybutylene terephthalate, or plastic such as polyolefin such as high-density polyethylene or polypropylene can be used.

The plastic film constituting the first base material layer 31 may be stretched uniaxially or biaxially. In this case, the first base material layer 31 is preferably stretched so that the tensile strength in the first direction D1 is larger than the tensile strength in the second direction D2. As a result, the first base material layer 31 is easily torn along the first direction D1. In the following description, among the characteristics of the plastic film such as the first base material layer 31, the characteristic that the tensile strength in the first direction D1 is larger than the tensile strength in the second direction D2 is also referred to as "longitudinal tear". Further, among the characteristics of the plastic film, the characteristic that the breaking strength in the first direction D1 is smaller than the breaking strength in the second direction D2 is also referred to as "longitudinal tear". Tensile strength is measured according to JIS K 7127.

In the plastic film constituting the first base material layer 31, the ratio of the tensile strength in the first direction D1 to the tensile strength in the second direction D2 is preferably 1.05 times or more, more preferably 1.10 times or more. It is more preferably 1.15 times or more. In the plastic film constituting the first base material layer 31, the tensile strength in the first direction D1 is, for example, 180 MPa or more and 220 MPa or less. The thickness of the first base material layer 31 is, for example, 10 μm or more and 20 μm or less.

As the material constituting the sealant layer 32, for example, polyethylene or polypropylene such as ethylene-methacrylic acid copolymer (EMMA), low density polyethylene (LDPE) or linear low density polyethylene (LLDPE) can be used. As the polypropylene, for example, an unstretched polypropylene film can be used. The thickness of the sealant layer 32 is, for example, 15 μm or more and 60 μm or less. The sealant layer 32 may be composed of a single layer or may be composed of a plurality of layers.

The print layer 33 includes a print display for showing product information and giving an aesthetic impression to the bag 10. Examples of the print display include characters, numbers, symbols, figures, and patterns.

The second substrate layer 35 contains at least paper. The basis weight of the paper is, for example, 15 g / m ² or more and 40 g / m ² or less.

Examples of the method for laminating the first base material layer 31, the sealant layer 32, the second base material layer 35, and the like include a dry laminating method and an extruded laminating method.
In the dry laminating method, the first base material layer 31, the sealant layer 32, the second base material layer 35, and the like are bonded together using an adhesive. In this case, the first adhesive layer 34 and the second adhesive layer 36 contain an adhesive such as an ether-based adhesive.
In the extruded laminating method, for example, the melted material constituting the sealant layer 32 is extruded into a film on the first base material layer 31. In this case, the adhesive layer may not be present between the first base material layer 31 and the sealant layer 32, or between the first base material layer 31 and the second base material layer 35.
The thickness of the first adhesive layer 34 is, for example, 1 μm or more and 20 μm or less. The thickness of the second adhesive layer 36 is, for example, 1 μm or more and 20 μm or less.

Although not shown, the packaging material 30 may further include a functional layer. As the functional layer, an appropriate one can be selected according to the required performance such as water vapor and other gas barrier properties, light shielding properties, and various mechanical strengths. For example, the packaging material 30 may further include a thin-film deposition layer provided on the first base material layer 31 or the sealant layer 32 as a functional layer having a gas barrier property. The thin-film deposition layer contains a substance having a gas barrier property, for example, an inorganic substance such as aluminum or an inorganic oxide such as aluminum oxide or silicon oxide.

A specific example of the layer structure of the packaging material 30 of FIG. 4 is shown below. The "/" represents the boundary between layers. The leftmost layer is a layer constituting the outer surface 302 of the packaging material 30, and the rightmost layer is a layer constituting the inner surface 301 of the packaging material 30.
Revenue stamp / paper / DL / vertical tear PET / DL / metal vapor deposition layer / CPP
The “mark” means a print layer that constitutes a print display. "DL" is an abbreviation for dry laminate and means that there is an adhesive layer containing an adhesive. "Vertical tear PET" means polyethylene terephthalate having the property of vertical tear. "CPP" means unstretched polypropylene film.

(Structure of easily broken part)
Next, the structure of the easily broken portion 20 will be described. FIG. 5 is an enlarged plan view showing an example of an easily broken portion. The easily broken portion 20 includes a plurality of partially penetrating portions 201. The partial penetration portion 201 is a hole provided on the outer surface 302 side of the packaging material 30 so as to penetrate at least the first base material layer 31 and not to penetrate the sealant layer 32. The plurality of partial penetration portions 201 are arranged along at least the first direction D1. As shown in FIG. 5, a plurality of partial penetrating portions 201 may be arranged side by side in the second direction D2 as well. The width W1 of the easily broken portion 20 in the second direction D2, that is, the existence range of the partial penetrating portion 201 in the second direction D2 is, for example, 2 mm or more and 15 mm or less.

The partial penetration portion 201 shown in FIG. 5 is formed by processing the packaging material 30 from the first base material layer 31 using, for example, a tool such as a file or a cutting edge.

The partial penetrating portion 201 may have a shape extending in a predetermined direction. For example, as shown in FIG. 6A, the partial penetration portion 201 may extend in a direction inclined with respect to the first direction D1. In the example shown in FIG. 6A, a plurality of partial penetration portions 201 are arranged in the first direction D1 and the second direction D2, respectively. The inclination direction is preferably set so that the partial penetration portion 201 is displaced in the 22nd direction D22 from the first end portion 13 toward the second end portion 14. In this case, when the user breaks the bag 10 along the easily broken portion 20 from the first end 13 side to the second end 14 side, the displacement of the breaking path in the second direction D2 is the 21st direction. It is more likely to occur in the 22nd direction D22 than in D21. Therefore, it is possible to prevent the breaking path from deviating from the easily broken portion 20 toward the D21 side in the 21st direction. It should be noted that the fact that the breaking path deviates from the easily broken portion 20 toward the 22nd direction D22 can be suppressed by the content 19. The inclination angle formed by the partial penetration portion 201 with respect to the first direction D1 is, for example, 5 ° or more and 40 ° or less, and more preferably 10 ° or more and 30 ° or less.

Further, as shown in FIG. 6B, the partial penetration portion 201 may extend along the first direction D1. In this case, as shown in FIG. 6B, the plurality of partially penetrating portions 201 may be arranged on the same straight line in the first direction D1 and may be arranged in a staggered pattern in the second direction D2. For example, when a plurality of partial penetrations 201 arranged in the first direction D1 in the row L1 are viewed from the second direction D2, the partial penetrations 201 in the row L1 are in the first direction D1 in the row L2 adjacent to the row L1. It may overlap in the gap between the plurality of partially penetrating portions 201 that are lined up. According to the partial penetration portion 201 shown in FIG. 6B, the breakage of the bag 10 along the easily breakable portion 20 can be easily caused to occur linearly along the first direction D1.

Further, as shown in FIG. 6C, the partial penetration portion 201 includes a first partial penetration portion 201a extending in a predetermined direction and a second partial penetration portion 201b extending in a direction different from the first partial penetration portion 201a. You may be. For example, the first partial penetration portion 201a is configured such that the first partial penetration portion 201a is displaced in the 22nd direction D22 from the first end portion 13 toward the second end portion 14. On the other hand, the second partial penetrating portion 201b is configured such that the second partial penetrating portion 201b is displaced in the 21st direction D21 from the first end portion 13 toward the second end portion 14. As shown in FIG. 6C, the plurality of first partial penetration portions 201a and the plurality of second partial penetration portions 201b may be arranged along the first direction D1, respectively. Further, in the second direction D2, the first partial penetrating portion 201a and the second partial penetrating portion 201b may be arranged in a staggered pattern. For example, when a plurality of first partial penetrating portions 201a arranged in the first direction D1 are viewed from the second direction D2, the first partial penetrating portion 201a is a plurality of second partial penetrating portions 201b arranged in the first direction D1. It may overlap in the gap between them. Further, the first partial penetration portion 201a and the second partial penetration portion 201b are arranged so that when the first partial penetration portion 201a and the second partial penetration portion 201b are viewed along the first direction D1, they partially overlap each other. It may have been. According to the first partial penetration portion 201a and the second partial penetration portion 201b shown in FIG. 6C, the displacement of the fracture path in the second direction D2 occurs alternately in the 21st direction D21 and the 22nd direction D22, and the zigzag shape fracture occurs. The route is realized. As a result, it is possible to prevent the fracture path from deviating from the easily fractured portion 20. Further, since a plurality of first partial penetrating portions 201a and second partial penetrating portions 201b are provided in the second direction D2, from the first end portion 13 to the second end portion 14 at a plurality of positions in the second direction D2. An extended fracture path can be realized, and the convenience of the user can be improved.

In FIG. 6C, an example is shown in which the first partial penetration portion 201a and the second partial penetration portion 201b are arranged in a plurality of rows along the first direction D1, but the present invention is not limited to this. In the example shown in FIG. 6D, the first partial penetration portion 201a and the second partial penetration portion 201b are arranged in one row along the first direction D1. Even in this case, as in the case of the example shown in FIG. 6C, the displacement of the fracture path in the second direction D2 occurs alternately in the 21st direction D21 and the 22nd direction D22, and the zigzag shape fracture path is realized. Will be done. As a result, it is possible to prevent the fracture path from deviating from the easily fractured portion 20. In the example shown in FIG. 6D, it is preferable to provide a component that indicates to the user at which position in the second direction D2 the break from the first end portion 13 to the second end portion 14 should be performed. The component may be, for example, a print display or the opening start portion 23 described above.

Further, as shown in FIG. 6E, the first partial penetrating portion 201a and the second partial penetrating portion 201b shown in FIG. 6D may be repeatedly arranged in the second direction D2. In the example shown in FIG. 6E, as in the case of the examples shown in FIGS. 6C and 6D, the displacement of the fracture path in the second direction D2 occurs alternately in the 21st direction D21 and the 22nd direction D22, and has a zigzag shape. A fracture path is realized. As a result, it is possible to prevent the fracture path from deviating from the easily fractured portion 20. Further, as compared with the case of the example shown in FIG. 6C, the degree of freedom of the starting position of the fracture in the second direction D2 is increased.

Further, as shown in FIG. 6F, the partial penetration portion 201 may have a curved shape. In the example shown in FIG. 6F, the plurality of partial penetration portions 201 are arranged side by side in the first direction D1 and the second direction D2, respectively. Preferably, the partial penetration portion 201 is configured such that the partial penetration portion 201 is displaced in the 22nd direction D22 from the first end portion 13 toward the second end portion 14. In this case, as in the case of the example shown in FIG. 6A, when the user breaks the bag 10 along the easily broken portion 20 from the first end portion 13 side to the second end portion 14 side, the second direction. Displacement of the fracture path in D2 is more likely to occur in the 22nd direction D22 than in the 21st direction D21. Therefore, it is possible to prevent the breaking path from deviating from the easily broken portion 20 toward the D21 side in the 21st direction.

FIG. 6G is a diagram showing a case where the first easily broken portion 21 located on the front surface 11 side and the second easily broken portion 22 located on the back surface 12 side of the packaging material 30 are arranged on the same plane. In FIG. 6G, the dotted line with reference numeral 15 indicates a portion that becomes the side end portion 15 of the bag 10 by folding back the packaging material 30. As shown in FIG. 6G, it is preferable that a region 203 in which the partial penetration portion 201 is not provided is provided between the first easily broken portion 21 and the second easily broken portion 22. As a result, it is possible to prevent the breaking path from deviating from the easily broken portion 20 and reaching the side end portion 15.
The shape and pattern of the partial penetration portion 201 in the example shown in FIG. 6G are arbitrary. For example, as the partial penetration portion 201 in the example shown in FIG. 6G, any of the partial penetration portions 201 shown in FIGS. 6A to 6F described above can be used. For example, the partial penetration portion 201 of the first easily broken portion 21 is inclined with respect to the first direction D1 so as to be displaced in the 22nd direction D22 from the first end portion 13 toward the second end portion 14. The portion 201a, and the partial penetration portion 201 of the second easily broken portion 22 may be the second partial penetration portion 201b inclined in the direction opposite to that of the first partial penetration portion 201a. In this case, when the packaging material 30 is folded back to form the side end portion 15, the first partial penetrating portion 201a of the first easily broken portion 21 and the second partial penetrating portion 201b of the second easily broken portion 22 are oriented in the same direction. It will be tilted. As a result, the effect of suppressing the fracture path from deviating to the 21st direction D21 side from the easily fractured portion 20 as described in the above-mentioned example shown in FIG. 6A is more likely to be exhibited.

FIG. 7 is a cross-sectional view showing an example of the easily broken portion 20. In the example shown in FIG. 7, the packaging material 30 has the layer structure shown in FIG. 4 described above. In this case, the partial penetration portion 201 penetrates, for example, the printing layer 33, the second base material layer 35, the second adhesive layer 36, and the first base material layer 31, but penetrates the first adhesive layer 34 and the sealant layer 32. do not.

A first example of a method for manufacturing the packaging material 30 provided with the partial penetration portion 201 shown in FIG. 7 will be described. First, the second base material layer 35 provided with the printing layer 33 and the first base material layer 31 are bonded together via the second adhesive layer 36 to prepare a laminated body 37. Subsequently, the laminated body 37 is processed by using a rotary die roll or the like provided with a cutting edge to form a through hole in the laminated body 37. After that, an adhesive is applied to the laminated body 37 in which the through holes are formed and dried to form the first adhesive layer 34, and the laminated body 37 and the sealant layer 32 are bonded to each other via the first adhesive layer 34. In this way, the printed layer 33, the second base material layer 35, the second adhesive layer 36, and the first base material layer 31 that formed the laminated body 37 are penetrated, but the first adhesive layer 34 and the sealant layer 32 are penetrated. A packaging material 30 provided with a partial penetration portion 201 that does not penetrate the can be obtained.

The cross-sectional structure of the partial penetration portion 201 will be described in more detail. FIG. 8 is an enlarged cross-sectional view showing an example of the partial penetration portion 201. The partial penetration portion 201 shown in FIG. 8 is an example of a hole formed when a cutting edge is inserted into the packaging material 30 including the first base material layer 31 and the second base material layer 35 from the side of the second base material layer 35. Is. In this case, since the cutting edge contacts the second base material layer 35 before the first base material layer 31, the second base material layer 35 is formed on the wall surface 202 of the partial penetration portion 201 as shown in FIG. , Is located closer to the center of the partial penetration portion 201 than the first base material layer 31.

Hereinafter, the advantage that the second base material layer 35 is located closer to the center of the partial penetration portion 201 than the first base material layer 31 on the wall surface 202 of the partial penetration portion 201 will be described. When the adhesive is applied to the laminated body 37 including the first base material layer 31 and the second base material layer 35 and having the through holes (partially penetrating portion 201) formed, the adhesive passes through the through holes of the laminated body 37. It is conceivable that it leaks to the outer surface 302 side. Here, according to the laminated body 37 provided with the through hole (partial penetration portion 201) shown in FIGS. 7 and 8, the second base material layer 35 containing paper located on the wall surface 202 of the partial penetration portion 201 , Can absorb the adhesive. Therefore, it is possible to prevent the adhesive from leaking to the outer surface 302 side.

When the cutting edge is inserted from the second base material layer 35 side into the laminate 37 including the first base material layer 31 and the second base material layer 35, as shown in FIG. 8, the first base material layer of the partial penetration portion 201 The edge on the 31 side may rise toward the inner surface 301. In this case, as shown in FIG. 8, the raised portion 303 may also appear on the inner surface 301 of the packaging material 30.

As shown in FIG. 8, the cross-sectional area of the partial penetration portion 201 may increase from the second base material layer 35 side toward the first base material layer 31 side. Such a cross-sectional shape can be obtained by using, for example, a method of inserting a cutting edge into the laminate 37 including the first base material layer 31 and the second base material layer 35 from the side of the second base material layer 35 to provide the partial penetration portion 201. May appear when forming.

Although not shown, the partial penetration portion 201 is formed by using a method of inserting a cutting edge from the first base material layer 31 side into the laminate 37 including the first base material layer 31 and the second base material layer 35. You may.

Next, a second example of a method for manufacturing the packaging material 30 provided with the partial penetration portion 201 shown in FIG. 7 will be described. For example, first, the packaging material 30 having the laminate 37 and the sealant layer 32 bonded to the laminate 37 is prepared, and then the packaging material 30 is irradiated with laser light from the outer surface 302 side of the packaging material 30. As a result, the partial penetration portion 201 can be formed in the packaging material 30.

When the laser processing method is used, the packaging material 30 preferably includes a stopper layer that is not destroyed by laser light, such as a metal vapor deposition layer. In this case, the partial penetration portion 201 is formed in the packaging material 30 as a hole that penetrates the layer on the outer surface 302 side of the stopper layer but does not penetrate the stopper layer and the layer on the inner surface 301 side of the stopper layer. Therefore, for example, by providing a stopper layer such as a metal vapor deposition layer on the outer surface 302 side of the sealant layer 32, it is possible to form a partial penetration portion 201 that penetrates at least the first base material layer 31 but does not penetrate the sealant layer 32. can.

Bag Opening Method Next, the method of opening the bag 10 described above will be described with reference to FIGS. 9 and 10.

First, the user picks the corner portion 18 between the side end portion 15 and the first end portion 13 close to the easily broken portion 20, and starts breaking the bag 10 starting from the opening start portion 23. Subsequently, the user pulls, for example, the corner portion 18 toward the second end portion 14 side. Here, in the present embodiment, as described above, the easily broken portion 20 extending from the first end portion 13 to the second end portion 14 along the first direction D1 so as not to intersect with the gassho portion 17 is attached to the bag 10. It is provided. Therefore, as shown in FIG. 9, the breakage of the bag 10 can be linearly advanced along the first direction D1. Therefore, as shown in FIG. 10, an opening 24 extending from the first end seal portion 131 to the second end seal portion 141 can be formed in the bag 10. As a result, the contents 19 are taken out as compared with the case where the breakage of the bag 10 does not proceed linearly and the breakage of the bag 10 is interrupted at the side end portion 15 before reaching the second end portion 14. Ease can be improved.

It is possible to make various changes to each of the above-described embodiments. Hereinafter, a modified example will be described. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiments will be used for the parts that can be configured in the same manner as in each of the above-described embodiments. , Omit duplicate description. Further, when it is clear that the action and effect obtained in the above-described embodiment can be obtained in the modified example, the description thereof may be omitted.

(First modification)
FIG. 11 is a plan view showing the bag 10 according to the first modification. Further, FIG. 12 is a cross-sectional view of the bag 10 of FIG. 11 as viewed from the XII-XII direction. As shown in FIGS. 11 and 12, the bag 10 contains a packaging material 30 folded between the front surface 11 and the back surface 12, from the first end 13 to the second end 14 along the second direction D2. A side gusset portion 16 extending from the side gusset portion 16 may be further provided. As shown in FIG. 12, the packaging material 30 between the front surface 11 and the back surface 12 is folded so that the folded portion 161 is located inside.

As shown in FIG. 11, the easily broken portion 20 extends along the side gusset portion 16 on the gassho portion 17 side of the side gusset portion 16 at least partially. For example, as shown in FIG. 12, the easy-breaking portions 20 such as the first easy-breaking portion 21 and the second easy-breaking portion 22 are located at least partially on the gassho portion 17 side (inside) of the folded-back portion 161. There is. The easily broken portion 20 may extend so as to straddle the folded portion 161 when viewed along the normal direction of the surface 11.

As shown in FIGS. 11 and 12, the bag 10 is located on the back surface 12 side and the portion of the packaging material 30 folded between the front surface 11 and the back surface 12 in the side gusset portion 16. An adhesive portion 162 for adhering to the portion may be further provided.

Method of opening the bag Next, a method of opening the bag 10 according to the present modification will be described. First, the user picks the corner portion 18 between the side end portion 15 and the first end portion 13 close to the easily broken portion 20, and starts breaking the bag 10 starting from the opening start portion 23. Subsequently, the user pulls, for example, the corner portion 18 toward the second end portion 14 side.

Here, in the present embodiment, the side gusset portion 16 is configured at the side end portion 15. In the side gusset portion 16, as shown in FIG. 12, the one-layer packaging material 30 constituting the front surface 11, the one-layer packaging material 30 constituting the back surface 12, and the side gusset portion 16 are folded between the front surface 11 and the back surface 12. The four-layer packaging material 30 including the two-layer packaging material 30 overlaps with each other. On the other hand, in the portion inside the folded portion 161 of the side gusset portion 16, a two-layer packaging material including a one-layer packaging material 30 constituting the front surface 11 and a one-layer packaging material 30 constituting the back surface 12 30 are overlapping. As described above, the number of layers constituting the side gusset portion 16 is a portion of the bag 10 adjacent to the side gusset portion 16 (hereinafter, also referred to as an adjacent portion) located inside the folded portion 161 of the side gusset portion 16. ) Is more than the number of layers. Therefore, the strength of the side gusset portion 16 is higher than the strength of the adjacent portion. Further, in the present embodiment, the easily broken portion 20 is provided so as to straddle the folded-back portion 161 which is the boundary between the side gusset portion 16 and the adjacent portion. Therefore, when the user breaks the bag 10 along the easy-breaking portion 20, the breaking of the bag 10 can proceed more linearly using the folded-back portion 161 of the side gusset portion 16 as a guide. As a result, the opening 24 extending from the first end seal portion 131 to the second end seal portion 141 can be easily formed in the bag 10.

(Second modification)
FIG. 13 is a plan view showing the bag 10 according to the second modification. As shown in FIG. 13, the first easily broken portion 21 of the easily broken portion 20 may be provided so as to straddle the base portion 173 of the gassho portion 17 in the second direction D2. In this case, the deviation of the breaking path toward the 22nd direction D22 side from the easy breaking portion 20 can be suppressed by the base portion 173 of the gassho portion 17.

(Other variants)
In the above-described embodiment and modification, an example is shown in which the easily broken portion 20 has a first easily broken portion 21 provided on the front surface 11 and a second easily broken portion 22 provided on the back surface 12. .. However, the present invention is not limited to this, and the easily broken portion 20 may have at least one of the first easily broken portion 21 and the second easily broken portion 22.

Although some modifications to the above-described embodiments have been described, it is naturally possible to apply a plurality of modifications in combination as appropriate.

10 Bag 11 Front surface 12 Back surface 13 1st end 131 1st end Seal 14 2nd end 141 2nd end Seal 15 Side end 16 Side gusset 161 Folded part 162 Adhesive part 17 Gassho part 171 Gassho part Sealing part 18 Square part 19 Contents 20 Easy breaking part 201 Partial penetration part 202 Wall surface 21 First easy breaking part 22 Second easy breaking part 23 Opening start part 24 Opening 30 Packaging material 301 Inner surface 302 Outer surface 31 First base material layer 32 Sealant layer 33 Printing layer 34 First adhesive layer 35 Second base material layer 36 Second adhesive layer 37 Laminated body

Claims (7)

A bag made of packaging material with front and back surfaces.
The packaging material includes a first base material layer containing a biaxially stretched plastic film, a second base material layer located on the outer surface side of the bag with respect to the first base material layer, and the first base material layer containing paper. It has a sealant layer located on the inner surface side of the bag with respect to the material layer, and an adhesive layer located between the first base material layer and the sealant layer.
The bag
The first end and
A second end facing the first end in the first direction,
A gassho portion extending from the first end portion to the second end portion along the first direction and on which the packaging material is overlapped on the surface side.
A sealing portion that joins the inner surfaces of the packaging materials at the first end portion, the second end portion, and the gassho portion.
It is provided on at least one of the front surface and the back surface, and includes an easily broken portion extending from the first end portion to the second end portion along the first direction so as not to intersect with the gassho portion.
The easily broken portion is a bag having a plurality of partially penetrating portions that penetrate at least the first base material layer and the second base material layer and do not penetrate the sealant layer. A side gusset portion comprising the packaging material folded between the front surface and the back surface and extending from the first end portion to the second end portion along the first direction is further provided.
The bag according to claim 1, wherein the easily broken portion extends along the side gusset portion at least partially on the gassho portion side of the side gusset portion. 2. The side gusset portion further includes an adhesive portion for adhering a portion located on the front surface side and a portion located on the back surface side of the packaging material folded between the front surface and the back surface side. The bag described in. The aspect according to any one of claims 1 to 3, wherein the second base material layer is located on the wall surface of the partial penetration portion on the central side of the partial penetration portion with respect to the first base material layer. bag. The bag according to any one of claims 1 to 4, wherein the cross-sectional area of the partial penetrating portion increases from the second base material layer side toward the first base material layer side. Claims 1 to 5, wherein the tensile strength of the first base material layer of the packaging material in the first direction is larger than the tensile strength of the first base material layer in the second direction orthogonal to the first direction. The bag described in any one item. The easily broken portion is provided on the back surface so as to overlap the first easily broken portion provided on the front surface and the first easily broken portion when viewed along the normal direction of the surface. The bag according to any one of claims 1 to 6, which has an easily broken portion.

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