JP7129033B2 - bag - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bag provided with a containing portion for containing contents.

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

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

JP-A-10-250764

An opening is formed in the bag when the user breaks the bag along the opening means. If the bag can be cut linearly from one end to the other, the size of the opening will be increased, making it easier to take out the contents contained in the bag.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bag having opening means that can effectively solve such problems.

The present invention is a bag formed of a packaging material and having a front surface and a back surface, wherein the packaging material comprises a first base material layer comprising a biaxially oriented plastic film and a A second substrate layer located on the outer surface side and containing paper, a sealant layer located closer to the inner surface side of the bag than the first substrate layer, and between the first substrate layer and the sealant layer a layer of adhesive positioned thereon, said bag having a first end, a second end opposite said first end in a first direction, and said first end to said second end. extending along the first direction to join the inner surfaces of the packaging material at the first end, the second end, and the palm-to-palm portion where the packaging material is overlapped on the surface side and the palm-to-palm portion a seal portion; and an easily breakable portion provided on at least one of the front surface and the back surface and extending along the first direction from the first end portion to the second end portion so as not to intersect the palm-to-palm portion. , wherein the easy-to-break portion is a bag having a plurality of partial penetration portions that penetrate at least the first base material layer and do not penetrate the sealant layer.

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

The bag according to the present invention has an adhesive part for bonding a part positioned on the front side and a part positioned on the back side of the packaging material folded between the front side and the back side in the side gusset part. It may be further provided.

In the bag according to the present invention, the cross-sectional area of the partial penetration portion may increase from the outer surface side toward the inner surface 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 greater than the tensile strength of the first base material layer in the second direction perpendicular to the first direction. good too.

In the bag according to the present invention, the easily tearable portion includes a first easily tearable portion provided on the front surface and the back surface so as to overlap the first easily tearable portion when viewed along the normal direction of the surface. and a second easily breakable portion provided in the.

According to the present invention, the user can easily tear the bag along the easily tearable portion. Therefore, it is possible to improve the ease of taking out the contents.

1 is a plan view showing a bag according to an embodiment of the invention; FIG. FIG. 2 is a cross-sectional view of the bag of FIG. 1 as seen from the II-II direction; FIG. 2 is a cross-sectional view showing an example of the layer structure of the packaging material that constitutes the bag; FIG. 2 is a cross-sectional view showing an example of the layer structure of the packaging material that constitutes the bag; It is a top view which shows an example of an easily breakable part. Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; Fig. 10 is a plan view showing another example of an easily breakable portion; FIG. 6 is a cross-sectional view of the easily breakable portion of FIG. 5 viewed from the VII-VII direction; FIG. 4 is an enlarged cross-sectional view showing a partially penetrating portion of an easily breakable portion; FIG. 2 is a plan view showing how the bag shown in FIG. 1 is unsealed; FIG. 4 is a plan view showing the bag in an unsealed state; FIG. 11 is a plan view showing a modified example of the bag; FIG. 12 is a cross-sectional view of the bag of FIG. 11 viewed from the XII-XII direction; FIG. 11 is a plan view showing a modified example of the bag;

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10. FIG. In addition, in the drawings attached to this specification, for convenience of illustration and easy understanding, the scale, the ratio of length and width, etc. are appropriately changed and exaggerated from those of the real thing.

In addition, the terms such as "parallel", "perpendicular", "same" and the like, length and angle values, etc. that specify shapes and geometric conditions and their degrees used in this specification are strictly It shall be interpreted to include the extent to which similar functions can be expected without being bound by the meaning.

Bag FIG. 1 is a plan view showing a bag 10 containing a content 19. FIG. 2 is a cross-sectional view of the bag 10 of FIG. 1 as seen from the II-II direction. The bag 10 is formed by partially bonding the inner surfaces of the film-like packaging material 30 together. Bag 10 includes a front side 11 and a back side 12 constituted by packaging material 30 . As shown in FIG. 2, both the front side 11 and the back side 12 are formed by folding a sheet of packaging material 30. As shown in FIG. Although not shown, the number of packaging materials 30 that constitute 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 13 , a second end 14 opposite the first end 13 in the first direction D1 , and from the first end 13 to the second end 14 . and a pair of side ends 15 extending along the first direction D1. The first direction D1 is the direction in which the packaging material 30 is conveyed when the bag 10 is produced from the film-like packaging material 30, and is the 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 perpendicular to the first direction D1, so that 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 palm-to-palm portion 17 extending from the first end 13 to the second end 14 along the first direction D1 and having the packaging material 30 overlaid thereon. Thus, the bag 10 is a so-called pillow bag. The palm-to-palm portion 17 is located on the surface 11 side. In other words, in the present embodiment, the surface on which palm-to-palm portion 17 is located is referred to as surface 11 .

The bag 10 has a sealing portion that joins the inner surfaces of the film-like packaging material 30 together. 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 palm-joint portion seal portion 171 located at the palm-joint portion 17. . In addition, as long as the inner surfaces of the packaging material 30 can be joined to seal the bag 10, the method for forming the seal portion is not particularly limited. For example, the sealing portion may be formed by melting a portion of the packaging material 30 by heating and welding the inner surfaces of the packaging material 30 together. Alternatively, the sealing portion may be formed by bonding the inner surfaces of the packaging material 30 together using an adhesive or the like.

As shown in FIG. 1 , the palm-to-palm seal portion 171 extends in the first direction D1 from the first end seal portion 131 to the second end seal portion 141 . As shown in FIG. 2 , the palm-to-palm sealing portion 171 may extend to the distal end portion 172 of the palm-to-palm portion 17 in the second direction D2. It does not have to extend to 172. In addition, the palm-joint seal portion 171 may extend to the base portion 173 of the palm-joint portion 17 in the second direction D2. good too.

As shown in FIG. 1 , the bag 10 includes an easily tearable 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 palm-joint portion 17 . The easy-to-break portion 20 is a portion configured to be easier to break than 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 an easy-to-break portion 20 in the bag 10 , when the user breaks the bag 10 , the breakage easily occurs along the easy-to-break portion 20 . The structure of the breakable 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 the easily breakable portion 20 when viewed along the first direction D1. The opening start portion 23 is a portion that triggers breakage when the bag 10 is broken along the easily breakable portion 20 . The opening initiation portion 23 includes, for example, a notch formed in the first end 13 or the second end 14 . The notch is a notch such as a V-shape, a notch, or the like.

The easy-to-break portions 20 such as the first easy-to-break portion 21 and the second easy-to-break portion 22 may be positioned in the vicinity of either one of the pair of side ends 15 . In the example shown in FIG. 2 , the breakable portion 20 is positioned near the left side end portion 15 . In the following description, the direction from the palm-joining portion 17 to the easily breakable portion 20 in the second direction D2 is referred to as the 21st direction, and the direction from the easily breakable portion 20 to the palm-joining portion 17 in the second direction D2. is also referred to as the 22nd 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 portion 191 of the content 19 in the second direction D2. may be Also, the easily breakable portion 20 may be positioned 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 spreads across the end 191 of the content 19 in the second direction D2 when viewed along the normal direction of the surface 11 . The "outer side" means the side away from the center of the bag 10 in plan view, and the "inner side" means the side closer to the center of the bag 10 in plan view.

Contents 19 are, for example, solids. The contents 19 may be solids that people eat, such as food and medicine, or solids that people do not eat, such as bath salts. Specific examples of the contents 19 include plate-like chocolates, cookies, rice crackers, cheese, ham sausages, stationery, toys, cards, and the like.

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

The packaging material 30 includes at least a first substrate layer 31 and a sealant layer 32 . In the example shown in FIG. 3 , the first substrate 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 . Moreover, the packaging material 30 may further include a printed layer 33 provided on the inner surface 301 side of the first base material layer 31, for example. Moreover, the packaging material 30 may further include a first adhesive layer 34 that bonds the first base material layer 31 and the sealant layer 32 together. 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. As shown in FIG. The packaging material 30 may further include a second base material layer 35 positioned closer to the outer surface 302 than the first base material layer 31 . When the packaging material 30 includes the second base material layer 35, the printed layer 33 may be provided on the outer surface 302 side of the second base material layer 35, as shown in FIG. Moreover, the packaging material 30 may further include a second adhesive layer 36 that bonds the first base material layer 31 and the second base material layer 35 together. 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.

Each layer of the packaging material 30 will be described below.

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

The plastic film forming the first base material layer 31 may be uniaxially or biaxially stretched. In this case, the first base material layer 31 is preferably stretched so that the tensile strength in the first direction D1 is greater than the tensile strength in the second direction D2. This makes it easier for the first base material layer 31 to tear along the first direction D1. In the following description, among the properties of the plastic film such as the first base material layer 31, the property that the tensile strength in the first direction D1 is greater than the tensile strength in the second direction D2 is also referred to as "longitudinal tear." 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 called "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. and more preferably 1.15 times or more. In the plastic film forming 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 material layer 31 is, for example, 10 μm or more and 20 μm or less.

As a material for forming the sealant layer 32, for example, polyethylene such as ethylene-methacrylic acid copolymer (EMMA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or polypropylene 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 multiple layers.

The printed layer 33 includes printed indicia for indicating product information and giving aesthetics to the bag 10 . Examples of printed displays include characters, numbers, symbols, graphics, and patterns.

The second base material 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 methods for laminating the first base material layer 31, the sealant layer 32, the second base material layer 35, and the like include a dry lamination method and an extrusion lamination method.
In the dry lamination method, the first base material layer 31, the sealant layer 32, the second base material layer 35, and the like are attached 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 extrusion lamination method, for example, a molten material constituting the sealant layer 32 is extruded onto the first base material layer 31 in the form of a film. In this case, an adhesive layer may not exist between the first base layer 31 and the sealant layer 32 or between the first base layer 31 and the second base layer 35 .
The thickness of the first adhesive layer 34 is, for example, 1 μm or more and 20 μm or less. Also, 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 functional layers. 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 vapor deposition layer provided on the first base material layer 31 or the sealant layer 32 as a functional layer with gas barrier properties. The deposited layer contains, for example, a substance having gas barrier properties, 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 structure of the packaging material 30 of FIG. 4 is shown below. "/" represents the boundary between layers. The layer on the left end is the layer forming the outer surface 302 of the packaging material 30 , and the layer on the right end is the layer forming the inner surface 301 of the packaging material 30 .
Stamp/paper/DL/longitudinal tear PET/DL/metal deposition layer/CPP
"Indicia" means the printed layers that make up the printed indicia. "DL" is an abbreviation for dry laminate, meaning that there is an adhesive layer containing adhesive. "Spindle PET" means polyethylene terephthalate that has the property of splitting. "CPP" means unstretched polypropylene film.

(Structure of breakable part)
Next, the structure of the easily breakable portion 20 will be described. FIG. 5 is a plan view showing an enlarged example of an 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 the sealant layer 32 . The plurality of partial through-holes 201 are arranged along at least the first direction D1. As shown in FIG. 5, a plurality of partial through-holes 201 may be arranged in the second direction D2 as well. The width W1 of the easily breakable portion 20 in the second direction D2, that is, the existence range of the partially penetrating 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 first base material layer 31, for example, using a tool such as a file or a cutting blade.

The partial penetration part 201 may have a shape extending in a predetermined direction. For example, as shown in FIG. 6A, the partial through 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 through portions 201 are arranged in the first direction D1 and the second direction D2. The inclination direction is preferably set such that the partial through 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 breakable portion 20 from the first end portion 13 side toward the second end portion 14 side, the displacement of the breaking path in the second direction D2 It is more likely to occur in the 22nd direction D22 than in D21. Therefore, it is possible to prevent the breakage path from deviating from the easily breakable portion 20 to the 21st direction D21 side. Note that the content 19 can prevent the breakage path from deviating from the easily breakable portion 20 toward the 22nd direction D22. The inclination angle of 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 through portion 201 may extend along the first direction D1. In this case, as shown in FIG. 6B, the plurality of partial through portions 201 may be arranged on the same straight line in the first direction D1 and arranged in a zigzag pattern in the second direction D2. For example, when the plurality of partial through-holes 201 aligned in the first direction D1 in the row L1 are viewed from the second direction D2, the partial through-holes 201 in the row L1 extend in the first direction D1 in the row L2 adjacent to the row L1. It may overlap the gaps between the plurality of partial through portions 201 lined up. According to the partially penetrating portion 201 shown in FIG. 6B, the breakage of the bag 10 along the easily breakable portion 20 can be facilitated 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 can stay. For example, the first partial penetration portion 201a is configured to be 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 penetration portion 201b is configured to be 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 through-holes 201a and the plurality of second partial through-holes 201b may be arranged along the first direction D1. In addition, in the second direction D2, the first partially penetrating portion 201a and the second partially penetrating portion 201b may be arranged in a zigzag pattern. For example, when the plurality of first through-parts 201a arranged in the first direction D1 are viewed from the second direction D2, the first through-parts 201a overlap the plurality of second through-parts 201b arranged in the first direction D1. It may overlap the gap between them. Further, the first partial penetration portion 201a and the second partial penetration portion 201b are arranged such that the first partial penetration portion 201a and the second partial penetration portion 201b partially overlap when viewed along the first direction D1. may have been According to the first partially penetrating portion 201a and the second partially penetrating 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, resulting in a zigzag fracture. A route is realized. As a result, it is possible to prevent the breaking path from deviating from the easily breaking portion 20 . In addition, since the plurality of first partial through portions 201a and the second partial through portions 201b are provided in the second direction D2, there are a plurality of positions in the second direction D2 from the first end portion 13 to the second end portion 14. An extended rupture path can be realized, and convenience for the user can be improved.

FIG. 6C shows an example in which the first through-parts 201a and the second through-parts 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 penetrating portion 201a and the second partial penetrating portion 201b are arranged in one row along the first direction D1. Even in this case, as in the example shown in FIG. 6C, the 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-shaped fracture path is realized. be done. As a result, it is possible to prevent the breaking path from deviating from the easily breaking portion 20 . It should be noted that in the example shown in FIG. 6D, a component is preferably provided to indicate to the user at which position in the second direction D2 the break from the first end 13 to the second end 14 should be performed. The component may be, for example, a printed display, or may be the opening start section 23 described above.

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

Also, 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 through portions 201 are arranged in the first direction D1 and the second direction D2. 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 from the first end portion 13 side toward the second end portion 14 side along the easily tearable portion 20, 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 breakage path from deviating from the easily breakable portion 20 to the 21st direction D21 side.

FIG. 6G is a diagram showing a case where the first easily tearable portion 21 located on the front surface 11 side of the packaging material 30 and the second easily tearable portion 22 located on the back surface 12 side are arranged on the same plane. In FIG. 6G, the dotted line labeled 15 indicates the portion that will become the side edge 15 of the bag 10 when the packaging material 30 is folded back. 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 breakable portion 21 and the second easily breakable portion 22 . As a result, it is possible to prevent the breakage path from deviating from the breakable portion 20 and reaching the side end portion 15 .
The shape and pattern of the partially penetrating portion 201 in the example shown in FIG. 6G are arbitrary. For example, any of the partial penetration portions 201 shown in FIGS. 6A to 6F can be used as the partial penetration portion 201 in the example shown in FIG. 6G. For example, the partial through portion 201 of the first easily breaking portion 21 is a first partial through portion 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 partially penetrating portion 201 of the second easily breakable portion 22, which is the portion 201a, may be the second partially penetrating portion 201b inclined in the opposite direction to the first partially penetrating portion 201a. In this case, when the side end portion 15 is formed by folding the packaging material 30, the first partial through portion 201a of the first easily breakable portion 21 and the second partial through portion 201b of the second easily breakable portion 22 are oriented in the same direction. It becomes slanted. As a result, the effect of suppressing the breakage path from deviating from the easily breakable portion 20 toward the 21st direction D21, as described in the example shown in FIG.

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 above. In this case, the partial penetration part 201 penetrates the printed layer 33, the second base material layer 35, the second adhesive layer 36, and the first base material layer 31, for example, and penetrates the first adhesive layer 34 and the sealant layer 32. do not do.

A first example of the method of 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 printed layer 33 and the first base material layer 31 are bonded together via the second adhesive layer 36 to produce the laminate 37 . Subsequently, the laminate 37 is processed using a rotary die roll having a cutting edge or the like to form through holes in the laminate 37 . After that, an adhesive is applied to the laminate 37 having the through holes and dried to form the first adhesive layer 34 , and the laminate 37 and the sealant layer 32 are bonded with the first adhesive layer 34 interposed therebetween. 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 constitute the laminate 37 are penetrated, but the first adhesive layer 34 and the sealant layer 32 are penetrated. It is possible to obtain the packaging material 30 provided with the partially penetrating portion 201 that does not penetrate through.

The cross-sectional structure of the partial penetration portion 201 will be described in more detail. FIG. 8 is a cross-sectional view showing an enlarged example of the partial penetration portion 201. As shown in FIG. A 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 layer 31 and the second base layer 35 from the second base layer 35 side. is. In this case, since the cutting edge contacts the second base material layer 35 before the first base material layer 31, as shown in FIG. , are located closer to the center of the partial through portion 201 than the first base material layer 31 .

Advantages of positioning the second base layer 35 closer to the center of the partial through portion 201 than the first base layer 31 on the wall surface 202 of the partial through portion 201 will be described below. When the adhesive is applied to the laminate 37 including the first base material layer 31 and the second base material layer 35 and having through holes (partial through portions 201 ) formed therein, the adhesive passes through the through holes of the laminate 37 . It is conceivable that the water leaks out to the outer surface 302 side. Here, according to the laminate 37 provided with the through holes (partially penetrating portions 201) shown in FIGS. , can absorb the glue. Therefore, it is possible to prevent the adhesive from leaking out to the outer surface 302 side.

When 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, as shown in FIG. The edge on the 31 side may rise toward the inner surface 301 side. In this case, ridges 303 may also appear on the inner surface 301 of the packaging material 30, as shown in FIG.

As shown in FIG. 8, the cross-sectional area of the partially penetrating portion 201 may increase from the second base layer 35 side toward the first base layer 31 side. Such a cross-sectional shape can be obtained, for example, 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 second base material layer 35 side, thereby cutting the partially through part 201 . It may appear when forming.

Although not shown, the partial penetration portion 201 is formed by cutting the laminate 37 including the first base layer 31 and the second base layer 35 from the first base layer 31 side. may

Next, a second example of the method of 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 . Thereby, the partial penetration part 201 can be formed in the packaging material 30 .

When using a laser processing method, the packaging material 30 preferably includes a stopper layer that is not destroyed 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 that penetrates the layer closer to the outer surface 302 than the stopper layer but does not penetrate the stopper layer and the layer closer to the inner surface 301 than 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 the partial penetration portion 201 that penetrates at least the first base material layer 31 but does not penetrate the sealant layer 32. can.

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

First, the user pinches the corner portion 18 between the side end portion 15 adjacent to the easily tearable portion 20 and the first end portion 13 to start tearing the bag 10 starting from the opening start portion 23 . Subsequently, the user pulls the corner 18 toward the second end 14, for example. Here, in the present embodiment, as described above, the easy-to-break portion 20 extending along the first direction D1 from the first end portion 13 to the second end portion 14 so as not to intersect with the joining portion 17 is attached to the bag 10. is provided. Therefore, as shown in FIG. 9, the rupture of the bag 10 can proceed linearly along the first direction D1. Therefore, as shown in FIG. 10, the bag 10 can be formed with an opening 24 extending from the first end seal portion 131 to the second end seal portion 141 . This makes it easier to remove the contents 19 than if the rupture of the bag 10 did not proceed linearly and the rupture of the bag 10 stopped at the side edge 15 before reaching the second end 14 . ease of use can be improved.

Various modifications can be made to each embodiment described above. Modifications will be described below. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding portions in the above-described embodiments are used for the portions that can be configured in the same manner as in each of the above-described embodiments. , redundant explanations are omitted. Further, when it is clear that the effects obtained in the above-described embodiment can also be obtained in the modified example, the explanation thereof may be omitted.

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

As shown in FIG. 11 , the breakable portion 20 at least partially extends along the side gusset portion 16 on the palm-joint portion 17 side of the side gusset portion 16 . For example, as shown in FIG. 12, the easy-to-break portions 20 such as the first easy-to-break portion 21 and the second easy-to-break portion 22 are located at least partially on the palm-to-palm portion 17 side (inner side) than the folding portion 161. there is The easily breakable portion 20 may extend across 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 positioned on the front surface 11 side and on the back surface 12 side of the packaging material 30 folded between the front surface 11 and the back surface 12 in the side gusset portion 16 . A bonding portion 162 for bonding the parts may be further provided.

Method for Opening Bag Next, a method for opening the bag 10 according to the present modification will be described. First, the user pinches the corner portion 18 between the side end portion 15 adjacent to the easily tearable portion 20 and the first end portion 13 to start tearing the bag 10 starting from the opening start portion 23 . Subsequently, the user pulls the corner 18 toward the second end 14, for example.

Here, in the present embodiment, side gusset portions 16 are formed at the side end portions 15 . In the side gusset portion 16, as shown in FIG. Four layers of packaging material 30 are superimposed, including two layers of packaging material 30 . On the other hand, in the portion inside the folded portion 161 of the side gusset portion 16, two layers of packaging material including one layer of packaging material 30 constituting the front surface 11 and one layer of packaging material 30 constituting the back surface 12 are provided. 30 overlap. In this way, the number of layers constituting the side gusset portion 16 is determined by the number of layers in the portion of the bag 10 adjacent to the side gusset portion 16 located inside the folded portion 161 of the side gusset portion 16 (hereinafter also referred to as the adjacent portion). ) than the number of layers that make up the Therefore, the strength of the side gusset portion 16 is higher than that of the adjacent portion. Further, in the present embodiment, the easily breakable portion 20 is provided so as to straddle the folded portion 161 that is the boundary between the side gusset portion 16 and the adjacent portion. Therefore, when the user breaks the bag 10 along the easy-to-break portion 20, the folding portion 161 of the side gusset portion 16 can be used as a guide to break the bag 10 more linearly. This makes it easier to form the opening 24 that extends from the first end seal portion 131 to the second end seal portion 141 in the bag 10 .

(Second modification)
FIG. 13 is a plan view showing the bag 10 according to the second modified example. As shown in FIG. 13 , the first easily breakable portion 21 of the easily breakable portion 20 may be provided so as to straddle the base portion 173 of the palm-joint portion 17 in the second direction D2. In this case, deviation of the breaking path from the easily breaking portion 20 toward the 22nd direction D<b>22 side can be suppressed by the base portion 173 of the joining portion 17 .

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

(Other aspects)
Another aspect of the present invention is a bag having a front side and a back side formed of a packaging material, the packaging material comprising a first substrate layer comprising a biaxially oriented plastic film and a second base material layer located on the outer surface side of the bag and containing paper, a sealant layer located closer to the inner surface side of the bag than the first base material layer, the first base material layer and the sealant layer and a layer of adhesive positioned between the bag, the bag having a first end, a second end opposite the first end in a first direction, and from the first end to the a palm-to-palm portion extending along the first direction to a second end and overlapping the packaging material on the surface side; and an inner surface of the packaging material at the first end, the second end, and the palm-to-palm portion. and a sealing portion that joins them together, and is provided on at least one of the front surface and the back surface, and extends from the first end to the second end along the first direction so as not to intersect the palm-to-palm portion. and an easy-to-break portion, wherein the easy-to-break portion has 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 bag according to another aspect of the present invention includes the packaging material folded between the front surface and the back surface, and side gussets extending along the first direction from the first end to the second end. The easy-to-break portion may at least partially extend along the side gusset portion on the palm joining portion side of the side gusset portion.

In the bag according to another aspect of the present invention, the part positioned on the front side and the part positioned on the back side of the packaging material folded between the front side and the back side in the side gusset portion are adhered. You may further provide the adhesion|attachment part which carries out.

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

In the bag according to another aspect of the present invention, the tensile strength of the first base material layer of the packaging material in the first direction is equal to the tensile strength of the first base material layer in the second direction perpendicular to the first direction. may be greater than

In the bag according to another aspect of the present invention, the easily tearable portion overlaps the first easily tearable portion provided on the surface and the first easily tearable portion when viewed along the normal direction of the surface. and a second easily breakable portion provided on the back surface.

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

10 bag 11 front surface 12 back surface 13 first end portion 131 first end seal portion 14 second end portion 141 second end seal portion 15 side end portion 16 side gusset portion 161 folded portion 162 adhesive portion 17 joint portion 171 joint portion Seal portion 18 Corner portion 19 Contents 20 Easy-to-break portion 201 Partial penetration portion 202 Wall surface 21 First easy-to-break portion 22 Second easy-to-break portion 23 Opening start portion 24 Opening 30 Packaging material 301 Inner surface 302 Outer surface 31 First base material layer 32 Sealant layer 33 Printed layer 34 First adhesive layer 35 Second substrate layer 36 Second adhesive layer 37 Laminate

Claims (6)

A bag formed of a packaging material and having a front surface and a back surface,
The packaging material comprises a first substrate layer containing a biaxially oriented plastic film, a second substrate layer located closer to the outer surface of the bag than the first substrate layer and containing paper, and the first substrate. A sealant layer located closer to the inner surface of the bag than the material layer, and an adhesive layer located between the first base material layer and the sealant layer,
The bag is
a first end;
a second end facing the first end in a first direction;
a palm-to-palm portion extending along the first direction from the first end to the second end and having the packaging material overlaid on the surface side;
a sealing portion that joins inner surfaces of the packaging material at the first end, the second end, and the palm-to-palm portion;
an easily breakable portion provided on at least one of the front surface and the back surface and extending along the first direction from the first end portion to the second end portion so as not to intersect the palm-to-palm portion;
The bag, wherein the easily breakable part has a plurality of partial penetration parts that penetrate at least the first base material layer and do not penetrate the sealant layer. 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;
2. The bag according to claim 1, wherein the breakable portion at least partially extends along the side gusset portion on the side of the palm-joint portion relative to the side gusset portion. 3. The side gusset further comprises a bonding portion for bonding a portion positioned on the front surface side and a portion positioned on the back surface side of the packaging material folded between the front surface and the back surface in the side gusset portion. The bag described in . 4. The bag according to any one of claims 1 to 3, wherein the cross-sectional area of the partial penetration portion increases from the outer surface side toward the inner surface side. 5. The packaging material according to any one of claims 1 to 4, wherein the tensile strength of the first base layer of the packaging material in the first direction is greater than the tensile strength of the first base layer in the second direction perpendicular to the first direction. A bag according to any one of the paragraphs. The easy-to-break portion includes a first easy-to-break portion provided on the front surface and a second easy-to-break portion provided on the back surface so as to overlap the first easy-to-break portion when viewed along the normal direction of the surface. 6. The bag according to any one of claims 1 to 5, comprising an easily breakable portion.

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