JP2019043608A - bag - Google Patents

Abstract

To provide a bag that is easy to tear along an easy-to-tear part.SOLUTION: The packaging material of the bag has a first base layer including a bi-axially oriented plastic film, a second base layer that is positioned on the outer surface side of the bag than the first base layer and includes paper, a sealant layer positioned on the inner surface side of the bag than the first base layer and an adhesive layer positioned between the first base layer and the sealant layer. The bag includes a first end part, a second end part opposite to the first end part in a first direction, a rafter part which extends from the first end part to the second end part in the first direction and on which the packaging material is overlapped on the surface side, a seal part that joins the inner surfaces of the packaging material on the second end part and the rafter part, and an easy-to-tear part which is provided at least on one of the front surface and the rear surface and extends in the first direction without intersecting with the rafter part from the first end part to the second end part. The easy-to-tear part has multiple partial penetration parts which penetrate at least the first base layer and the second base layer and do not penetrate the sealant layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bag provided with a storage unit for storing contents.

  As a bag for containing the contents, a bag composed of a film-like packaging material containing a plastic material such as PET or nylon is used. Such a bag is comprised by heat-welding the inner surfaces of a packaging material, and forming a seal | sticker part, as it describes, for example in patent document 1. FIG. In this case, the containing portion for containing the contents is defined as a space surrounded by the packaging material and the seal portion.

  Bags made of packaging material are usually provided with an opening means to facilitate breaking the seal and opening the bag. For example, Patent Document 1 proposes that an unsealing means be provided along the combined seal portion in the vicinity of the combined seal portion of the bag.

Japanese Patent Application Laid-Open No. 10-250764

  When the user tears 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 it becomes easier to take out the contents contained in the bag.

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 including a biaxially stretched plastic film, and the first base material layer of the bag. Between the second base layer containing paper, the sealant layer located on the inner side of the bag than the first base layer, and the first base layer and the sealant layer An adhesive layer positioned, the bag having a first end, a second end opposite the first end in a first direction, and the first end to the second end Extending along the first direction up to the first direction, and joining the inner surfaces of the packaging material at the first end, the second end, and the combined palm portion at which the packaging material is stacked on the front surface side; A seal portion and at least one of the front surface and the back surface, the first end portion And an easily breakable portion extending along the first direction so as not to intersect the combined palm portion up to the second end, and the easily breakable portion includes at least the first base material layer and the second base material. A bag having a plurality of partial penetrations through the layer and not through the sealant layer;

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

  In the bag according to the present invention, the side gusset portion is a bonding portion for bonding 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. It may further be provided.

  In the bag according to the present invention, the second base material layer may be located closer to the center of the partial penetration part than the first base material layer on the wall surface of the partial penetration part.

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

  In the bag according to the present invention, the tensile strength in the first direction of the first base layer of the packaging material is greater than the tensile strength of the first base layer in a second direction orthogonal to the first direction. It is also good.

  In the bag according to the present invention, the easily breakable portion overlaps the first easily breakable portion provided on the surface and the first easily breakable portion when viewed along the normal direction of the surface. And the second easily breakable part provided in

  According to the present invention, the user can easily break the bag along the easily breakable 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 II-II direction. It is sectional drawing which shows an example of the laminated constitution of the packaging material which comprises a bag. It is sectional drawing which shows an example of the laminated constitution of the packaging material which comprises a bag. It is a top view which shows an example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is a top view which shows the other example of an easily breakable part. It is sectional drawing which looked at the easily fractured part of FIG. 5 from the VII-VII direction. It is sectional drawing which expands and shows the partial penetration part of a easily fractured part. It is a top view which shows a mode that the bag shown in FIG. 1 is opened. It is a top view which shows the bag of 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, for the sake of easiness of illustration and understanding, the scale, vertical and horizontal dimensional ratio, etc. are appropriately changed and exaggerated from those of the real thing.

  In addition, as used in the present specification, the shape or geometric condition and the degree thereof are specified. For example, terms such as “parallel”, “orthogonal”, “identical”, values of length and angle, etc. Without being bound by the meaning, it shall be interpreted including the extent to which the same function can be expected.

Bag Fig. 1 is a plan view showing a bag 10 in which the contents 19 are accommodated. Moreover, FIG. 2 is sectional drawing which looked at the bag 10 of FIG. 1 from the II-II direction. The bag 10 is formed by partially bonding the inner surfaces of the film-like packaging material 30 to each other. The bag 10 comprises a front side 11 and a back side 12 constituted by a packaging material 30. As shown in FIG. 2, the front surface 11 and the back surface 12 are both configured by folding back a sheet of packaging material 30. Although not shown, the number of the packaging materials 30 constituting the bag 10 is not limited to one, and the bag 10 may be configured of a plurality of packaging materials 30.

  As shown in FIG. 1, the bag 10 includes a first end 13, a second end 14 opposed to the first end 13 in the first direction D 1, and the first end 13 to the second end 14. And a pair of side end portions 15 extending along the first direction D1. The first direction D1 is a conveyance direction of the packaging material 30 when producing the bag 10 from the film-like packaging material 30, and is a so-called MD (Machine Direction). In the example shown in FIG. 1, the first end 13 and the second end 14 extend in a second direction D2 orthogonal to the first direction D1, so that the bag 10 has a rectangular outer shape . Although not shown, the first end 13 and the second end 14 may extend in a direction inclined with respect to the second direction D2.

  As shown in FIG. 1 and FIG. 2, the bag 10 includes an integral palm portion 17 which extends along the first direction D1 from the first end portion 13 to the second end portion 14 and on which the packaging material 30 is superimposed. Thus, the bag 10 is a so-called pillow bag. The combined palm portion 17 is located on the surface 11 side. In other words, in the present embodiment, the surface on which the combined palm portion 17 is located is referred to as the surface 11.

  The bag 10 includes a seal that joins the inner surfaces of the film-like packaging material 30. 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 mating palm portion seal portion 171 located at the mating palm portion 17. . In addition, as long as the inner surfaces of the packaging material 30 can be joined and the bag 10 can be sealed, the method for forming the seal portion is not particularly limited. For example, the sealing 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 seal portion may be formed by bonding the inner surfaces of the packaging material 30 with an adhesive or the like.

  As shown in FIG. 1, the joint seal portion 171 extends in the first direction D1 so as to extend from the first end seal portion 131 to the second end seal portion 141. As shown in FIG. 2, the combined sealing part 171 may extend to the tip part 172 of the combined palm part 17 in the second direction D 2 or, although not shown, the combined sealing part 171 is a tip part It does not have to extend to 172. In addition, the joint seal part 171 may extend to the base 173 of the joint 17 in the second direction D2, or although not shown, the joint seal 171 does not extend to the base 173. It is also good.

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

  The opening start part 23 may be provided in the part which overlaps with the easily breakable part 20 when it sees along the 1st direction D1 among the 1st end part 13 or the 2nd end part 14. As shown in FIG. The opening start portion 23 is a portion serving as a trigger of breakage 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 13 or the second end 14. The notch is a V-shaped notch or a notch.

  The easily breakable portions 20 such as the first easily breakable portion 21 and the second easily breakable 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 breakable portion 20 is located near the side end 15 on the left side. In the following description, in the second direction D2, the direction from the combined palm portion 17 toward the easily breakable portion 20 is referred to as a twenty-first direction, and in the second direction D2, the direction from the easily breakable portion 20 to the combined palm portion 17 Is also referred to as the twenty-second direction.

  As shown in FIG. 2, the easily breakable portions 20 such as the first easily breakable portion 21 and the second easily breakable portion 22 are positioned at least partially outside the end 191 of the content 19 in the second direction D2. It may be In addition, the easily breakable 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 breakable portion 20 extends so as to straddle the end 191 of the content 19 in the second direction D2 when viewed along the normal direction of the surface 11. Note that “outside” means a side away from the center of the bag 10 in a plan view, and “inside” means a side approaching the center of the bag 10 in a plan view.

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

(Layer structure of packaging material)
Next, the layer configuration 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 configuration of the packaging material 30. As shown in FIG.

  The packaging material 30 at least includes a first base layer 31 and a 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. In addition, the packaging material 30 may further include the print layer 33 provided on the inner surface 301 side of the first base material layer 31, for example. In addition, the packaging material 30 may further include a first adhesive layer 34 that adheres the first base layer 31 and the sealant layer 32. The thickness of the packaging material 30 in which the first base material layer 31 constitutes the outer surface 302 as shown in FIG. 3 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 configuration of the packaging material 30. As shown in FIG. The packaging material 30 may further include a second base layer 35 located closer to the outer surface 302 than the first base layer 31. When the packaging material 30 includes the second base layer 35, as shown in FIG. 4, the print layer 33 may be provided on the outer surface 302 side of the second base layer 35. In addition, the packaging material 30 may further include a second adhesive layer 36 that adheres the first base layer 31 and the second base layer 35. 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 as shown in FIG. 4 is, for example, 35 μm or more and 100 μm or less.

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

  As a material which comprises the 1st substrate layer 31, plastics, such as polyesters, such as polyethylene terephthalate and poly butylene terephthalate, polyamides, such as nylon, high-density polyethylene, polyolefins, such as a polypropylene, can be used, for example.

  The plastic film constituting the first base layer 31 may be uniaxially or biaxially stretched. In this case, the first base 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. Thereby, 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 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 tearing". Moreover, the thing of the characteristic that the breaking strength in the 1st direction D1 becomes smaller than the breaking strength in the 2nd direction D2 among the properties of a plastic film is also called "longitudinal tearing". The tensile strength is measured in accordance with 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. More preferably, it is 1.15 times or more. In the plastic film constituting the first base 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 layer 31 is, for example, 10 μm or more and 20 μm or less.

  As a material which comprises the sealant layer 32, polyethylene, such as ethylene- methacrylic acid copolymer (EMMA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and polypropylene can be used, for example. As polypropylene, for example, a non-oriented 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 indicating product information or giving an aesthetic appearance to the bag 10. Examples of the printed display may include letters, numbers, symbols, figures, and patterns.

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

As a method of laminating the first base material layer 31, the sealant layer 32, the second base material layer 35 and the like, a dry laminating method, an extrusion laminating method and the like can be mentioned.
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 attached using an adhesive. In this case, the first adhesive layer 34 and the second adhesive layer 36 contain an adhesive such as an ether adhesive.
In the extrusion laminating method, for example, a material in a molten state constituting the sealant layer 32 is extruded in a film form on the first base 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, not less than 1 μm and not more than 20 μm.

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

A specific example of the layer configuration of the packaging material 30 of FIG. 4 is shown below. "/" Represents the boundary between layers. The layer on the left end is a layer constituting the outer surface 302 of the packaging material 30, and the layer on the right end is a layer constituting the inner surface 301 of the packaging material 30.
Mark / paper / DL / vertical split PET / DL / metal deposition layer / CPP
The "mark" means a printing layer that constitutes a printing display. "DL" stands for dry laminate and means that an adhesive layer comprising an adhesive is present. "Longitudinal PET" means polyethylene terephthalate having the properties of longitudinal tear. "CPP" means non-oriented polypropylene film.

(Structure of easily breakable part)
Next, the structure of the easily breakable portion 20 will be described. FIG. 5 is an enlarged plan view showing an example of the easily breakable portion. The easily breakable portion 20 includes a plurality of partial penetration 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 layer 31 and not to penetrate the sealant layer 32. The plurality of partial penetration parts 201 are arranged at least along the first direction D1. As shown in FIG. 5, a plurality of partial penetration parts 201 may be arranged also in the second direction D2. The width W1 of the easily breakable portion 20 in the second direction D2, that is, the existing range of the partial through portion 201 in the second direction D2 is, for example, 2 mm or more and 15 mm or less.

  The partial penetration part 201 shown in FIG. 5 is formed by processing the packaging material 30 from the 1st base material layer 31 using tools, such as a file and a cutting blade, for example.

  The partial penetration part 201 may have a shape extending in a predetermined direction. For example, as shown to FIG. 6A, the partial penetration part 201 may be extended in the direction inclined with respect to the 1st direction D1. In the example shown to FIG. 6A, several partial penetration part 201 is located in a line in the 1st direction D1 and the 2nd direction D2, respectively. The inclination direction is preferably set such that the partial penetration portion 201 is displaced in the twenty-second direction D22 from the first end 13 toward the second end 14. In this case, when the user breaks the bag 10 along the easily breakable portion 20 from the first end 13 side toward the second end 14 side, the displacement of the break path in the second direction D2 is the 21st direction This will occur more easily in the twenty-second direction D22 than in D21. For this reason, it can suppress that a fracture path deviates to the 21st direction D21 side rather than easy fracture part 20. The content 19 may suppress that the fracture path deviates to the 22nd direction D22 side with respect to the easily fractured part 20. The inclination angle which the partial penetration part 201 forms with respect to the 1st direction D1 is 5 degrees or more and 40 degrees or less, for example, More preferably, they are 10 degrees or more and 30 degrees or less.

  Further, as shown in FIG. 6B, the partial penetration part 201 may extend along the first direction D1. In this case, as shown in FIG. 6B, the plurality of partial penetration portions 201 may be arranged on the same straight line in the first direction D1 and may be arranged in a staggered manner in the second direction D2. For example, when the plurality of partial penetration portions 201 aligned in the first direction D1 in the row L1 is viewed from the second direction D2, the partial penetration portions 201 in the row L1 are in the first direction D1 in the row L2 adjacent to the row L1. It may overlap the gap between the plurality of partial penetration portions 201 arranged. According to the partial penetration part 201 shown in FIG. 6B, the breakage of the bag 10 along the easily breakable part 20 can be easily made 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. It may be. For example, the first partial through portion 201 a is configured to displace the first partial through portion 201 a in the twenty-second direction D <b> 22 from the first end 13 toward the second end 14. On the other hand, the second partial through portion 201 b is configured such that the second partial through portion 201 b is displaced in the twenty-first direction D <b> 21 from the first end 13 toward the second end 14. As shown to FIG. 6C, several 1st partial penetration part 201a and several 2nd partial penetration part 201b may be located in a line along the 1st direction D1, respectively. Further, in the second direction D2, the first partial through parts 201a and the second partial through parts 201b may be arranged in a zigzag. For example, when the plurality of first partial penetration portions 201a aligned in the first direction D1 is viewed from the second direction D2, the first partial penetration portions 201a are parallel to the plurality of second partial penetration portions 201b aligned in the first direction D1. It may overlap the gap between them. In addition, when the first partial penetration portion 201a and the second partial penetration portion 201b are viewed along the first direction D1, the first partial penetration portion 201a and the second partial penetration portion 201b are disposed such that they partially overlap. It may be done. According to the first partial penetration part 201a and the second partial penetration part 201b shown in FIG. 6C, displacement of the fracture path in the second direction D2 alternately occurs in the 21st direction D21 and the 22nd direction D22, and the zigzag fracture is generated. A path is realized. Thereby, it is possible to suppress that the fracture path deviates from the easily fractured portion 20. In addition, since the plurality of first partial penetration portions 201a and the second partial penetration portions 201b are provided in the second direction D2, from the first end 13 to the second end 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.

  Although FIG. 6C shows an example in which the first partial penetration parts 201a and the second partial penetration parts 201b are arranged in a plurality of rows along the first direction D1, the invention is not limited thereto. In the example shown in FIG. 6D, the first partial penetration parts 201a and the second partial penetration parts 201b are arranged in one row along the first direction D1. Even in this case, as in the example shown in FIG. 6C, displacement of the fracture path in the second direction D2 alternately occurs in the 21st direction D21 and the 22nd direction D22, and a zigzag fracture path is realized Be done. Thereby, it is possible to suppress that the fracture path deviates 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 breakage from the first end 13 to the second end 14 is to be performed. The component may be, for example, a print display, or may be the opening start unit 23 described above.

  Moreover, as shown to FIG. 6E, the 1st partial penetration part 201a and the 2nd partial penetration part 201b which are shown to FIG. 6D may be repeatedly located in a line in the 2nd direction D2. Also in the example shown in FIG. 6E, displacement of the fracture path in the second direction D2 alternately occurs in the 21st direction D21 and the 22nd direction D22 as in the case of the example shown in FIG. A fracture path is realized. Thereby, it is possible to suppress that the fracture path deviates from the easily fractured portion 20. Further, the degree of freedom of the fracture start position in the second direction D2 is higher than in the example shown in FIG. 6C.

  Moreover, as shown to FIG. 6F, the partial penetration part 201 may have a curved shape. In the example shown to FIG. 6F, several partial penetration part 201 is located in a line in the 1st direction D1 and the 2nd direction D2, respectively. Preferably, the partial penetration portion 201 is configured such that the partial penetration portion 201 is displaced in the twenty-second direction D22 from the first end 13 toward the second end 14. In this case, as in the example shown in FIG. 6A, when the user breaks the bag 10 along the easily breakable portion 20 from the first end 13 side toward the second end 14 side, the second direction The displacement of the fracture path at D2 is more likely to occur in the twenty-second direction D22 than the twenty-first direction D21. For this reason, it can suppress that a fracture path deviates to the 21st direction D21 side rather than easy fracture part 20.

FIG. 6G is a view showing a case where the first easily breakable portion 21 located on the surface 11 side of the packaging material 30 and the second easily breakable portion 22 located on the back surface 12 side are arranged on the same plane. In FIG. 6G, a dotted line denoted by reference numeral 15 indicates a portion which becomes the side end 15 of the bag 10 by folding the packaging material 30. As shown to FIG. 6G, it is preferable that the area | region 203 in which the partial penetration part 201 is not provided between the 1st easily breakable part 21 and the 2nd easy break parts 22 is provided. As a result, the fracture path can be prevented from deviating from the easily fractured portion 20 and reaching the side end portion 15.
The shape, pattern, etc. of the partial penetration part 201 in the example shown to FIG. 6G are arbitrary. For example, as the partial penetration part 201 in the example shown to FIG. 6G, either of the partial penetration parts 201 shown to the above-mentioned FIG. 6A thru | or FIG. 6F can be used. For example, the first partial penetration inclined with respect to the first direction D1 so that the partial penetration portion 201 of the first easily breakable portion 21 is displaced in the twenty-second direction D22 from the first end 13 toward the second end 14 In the portion 201a, the partial penetration portion 201 of the second easily breakable portion 22 may be a second partial penetration portion 201b inclined in the opposite direction to the first partial penetration portion 201a. In this case, when the packaging material 30 is folded back to form the side end 15, the first partial penetration portion 201a of the first easily breakable portion 21 and the second partial penetration portion 201b of the second easily breakable portion 22 are in the same direction. Become inclined. Thereby, the effect of suppressing the fracture path from deviating to the 21st direction D21 side with respect to the easily fractured portion 20 described in the example shown in FIG. 6A or the like is more easily exhibited.

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

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

  The sectional structure of the partial penetration portion 201 will be described in more detail. FIG. 8 is a cross-sectional view showing an example of the partial penetration portion 201 in an enlarged manner. The partial penetration part 201 shown in FIG. 8 is an example of a hole formed when the cutting blade is inserted into the packaging material 30 including the first base material layer 31 and the second base material layer 35 from the second base material layer 35 side. It is. In this case, since the cutting blade comes in contact with the second base layer 35 earlier than the first base layer 31, as shown in FIG. Further, it is located closer to the center side of the partial penetration part 201 than the first base material layer 31.

  Hereinafter, the advantage of the second base material layer 35 being located closer to the center side of the partial penetration part 201 than the first base material layer 31 in the wall surface 202 of the partial penetration part 201 will be described. The adhesive passes through the through holes of the laminate 37 when applying the adhesive to the laminate 37 including the first base material layer 31 and the second base material layer 35 and in which the through holes (partially penetrating portions 201) are formed. It is possible that the leaked to the outer surface 302 side. Here, according to the laminated body 37 provided with the through holes (partially penetrating portions 201) shown in FIGS. 7 and 8, the second base material layer 35 including paper, which is located on the wall surface 202 of the partially penetrating portions 201, , Can absorb the adhesive. Therefore, the adhesive can be prevented from leaking to the outer surface 302 side.

  When a cutting blade is inserted from the second base layer 35 side to the laminate 37 including the first base layer 31 and the second base layer 35, as shown in FIG. The edge on the side 31 may be raised to the inner surface 301 side. 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 part 201 may increase as it goes from the second base layer 35 side to the first base layer 31 side. Such a cross-sectional shape is obtained, for example, by using the 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 second base material layer 35 side. It may appear when forming.

  Although not shown, the partial penetration portion 201 is formed by using 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 first base material layer 31 side. May be

  Next, a second example of a method of manufacturing the packaging material 30 provided with the partial penetration part 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 subsequently, the packaging material 30 is irradiated with laser light from the outer surface 302 side of the packaging material 30. Thereby, the partial penetration part 201 can be formed in the packaging material 30.

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

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

  First, the user picks up the corner 18 between the side end 15 adjacent to the easily breakable portion 20 and the first end 13 and starts breaking the bag 10 starting from the opening start portion 23. Subsequently, the user pulls, for example, the corner 18 toward the second end 14 side. Here, in the present embodiment, as described above, the easily breakable portion 20 extending along the first direction D1 is attached to the bag 10 so as not to intersect with the palm portion 17 from the first end 13 to the second end 14. It is provided. For this reason, as shown in FIG. 9, the breakage of the bag 10 can be made to progress linearly along the first direction D1. For this reason, as shown in FIG. 10, the opening 24 which extends 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 breakage of the bag 10 does not proceed linearly, and the content 19 is taken out as compared with the case where the breakage of the bag 10 is interrupted at the side end 15 before reaching the second end 14. The ease can be improved.

  In addition, it is possible to add various change with respect to each embodiment mentioned above. Hereinafter, modified examples will be described. In the following description and the drawings used in the following description, for the parts that can be configured in the same manner as in the above-described embodiments, the same reference numerals are used as for the corresponding parts in the above-described embodiments. , Duplicate explanations are omitted. In addition, in the case where it is clear that the effects and advantages obtained in the above-described embodiment can be obtained also in the modified example, the description may be omitted.

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

  As shown in FIG. 11, the easily breakable portion 20 extends along the side gusset portion 16 at least partially on the side of the side palm portion 17 with respect to the side gusset portion 16. For example, as shown in FIG. 12, the easily breakable portions 20 such as the first easily breakable portion 21 and the second easy break portion 22 are at least partially located on the inner palm 17 side of the folded portion 161. There is. The easily breakable 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 FIG. 11 and FIG. 12, the bag 10 is positioned on a portion of the packaging material 30 folded between the front surface 11 and the back surface 12 in the side gusset portion 16 and on the back surface 12 side. You may further provide the adhesion part 162 which adhere | attaches a part.

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 up the corner 18 between the side end 15 adjacent to the easily breakable portion 20 and the first end 13 and starts breaking the bag 10 starting from the opening start portion 23. Subsequently, the user pulls, for example, the corner 18 toward the second end 14 side.

  Here, in the present embodiment, the side gusset portion 16 is formed at the side end portion 15. In side gusset portion 16, as shown in FIG. 12, one layer of packaging material 30 constituting surface 11, one layer of packaging material 30 constituting back surface 12, and a fold between surface 11 and back surface 12 Four layers of packaging material 30 overlap, including two layers of packaging material 30. On the other hand, at a portion inside the folded portion 161 of the side gusset portion 16, a two-layer packaging material including one layer of packaging material 30 constituting the surface 11 and one layer of packaging material 30 constituting the back surface 12 30 overlap. As described above, the number of layers constituting the side gusset portion 16 is a portion adjacent to the side gusset portion 16 (hereinafter also referred to as an adjacent portion) of the bag 10 located inside the folded portion 161 of the side gusset portion 16 More than the number of layers that make up). 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 breakable 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 easily breakable portion 20, the break of the bag 10 can be advanced more linearly by using the folded 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 a bag 10 according to a second modification. As shown in FIG. 13, the first easily breakable portion 21 of the easily breakable portion 20 may be provided to straddle the base portion 173 of the combined palm portion 17 in the second direction D2. In this case, the base portion 173 of the combined palm portion 17 can suppress that the fracture path deviates to the 22nd direction D22 side with respect to the easily fractured portion 20.

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

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

DESCRIPTION OF SYMBOLS 10 bag 11 surface 12 back surface 13 1st end part 131 1st end seal part 14 2nd end part 141 2nd end seal part 15 side end part 16 side gusset part 161 return part 162 adhesion part 17 joint palm part 171 joint palm part Seal part 18 corner part 19 content 20 easy break part 201 partial penetration part 202 wall surface 21 first easy break part 22 second easy break part 23 opening start part 24 opening part 30 packaging material 301 inner surface 302 outer surface 31 first base layer 32 sealant layer 33 printed layer 34 first adhesive layer 35 second base material layer 36 second adhesive layer 37 laminate

Claims (7)

A bag formed by a packaging material and having a front and a back,
The packaging material is a first base material layer including a biaxially stretched plastic film, a second base material layer located on the outer surface side of the bag than the first base material layer, and including paper, and the first base material layer. A sealant layer positioned on the inner surface side of the bag with respect to the material layer, and an adhesive layer positioned between the first base layer and the sealant layer,
The bag is
The first end,
A second end opposite to the first end in a first direction;
An integral palm portion extending along the first direction from the first end to the second end, and overlapping the packaging material on the surface side;
A seal portion joining the inner surfaces of the packaging material at the first end portion, the second end portion, and the combined palm portion;
A breakable portion provided on at least one of the front surface and the back surface and extending along the first direction so as not to intersect the combined palm portion from the first end to the second end;
The easily breakable portion has a plurality of partial penetration portions that penetrate at least the first base material layer and the second base material layer and do not penetrate the sealant layer. And a side gusset portion including the packaging material folded between the front surface and the back surface and extending along the first direction from the first end to the second end,
The bag according to claim 1, wherein the easily breakable portion extends at least partially along the side gusset portion closer to the joint palm portion than the side gusset portion.   The side gusset portion further includes a bonding portion for bonding 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. The bag described in.   The wall surface of the said partial penetration part WHEREIN: The said 2nd base material layer is located in the center side of the said partial penetration part rather than the said 1st base material layer, It is described in any one of Claim 1 thru | or 3. bag.   The bag according to claim 4, wherein a cross-sectional area of the partial penetration portion increases from the second base layer side toward the first base layer side.   The tensile strength of the first base material layer of the packaging material in the first direction is greater than the tensile strength of the first base material layer in a second direction orthogonal to the first direction. The bag according to any one of the preceding claims.   The easily breakable portion is provided on the back side so as to overlap with the first easily breakable portion provided on the surface and the first easily breakable portion when viewed along the normal direction of the surface. The bag according to any one of claims 1 to 6, which has a breakable portion.