Packaging bags

Abstract

To provide a packaging bag in which the taking-out property of a content is improved.SOLUTION: A packaging bag 2 is a pillow type packaging bag which has a cylindrical part 10 having a butt-seal part 8 sealing in a manner of butting both side ends of one laminate film 6 facing each other, and a first end seal part 14 and a second seal part 16 for sealing a first end 10a and a second end 10b of the cylindrical part in the extending direction of the butt-seal part. The packaging bag has: a first opening-scheduled line 18A which is formed along the direction crossing the extending direction in the vicinity of the first end seal part of the cylindrical part and breaks the cylindrical part; a second opening-scheduled line 18B which is formed along the direction crossing the extending direction in the vicinity of the second end seal part of the cylindrical part and breaks the cylindrical part; and a third opening-scheduled line 18C extending from the second opening-scheduled line toward the second end seal part. The breaking strength of the first to third opening-scheduled lines each are 20 N / 15 mm or more to 40 N / 15 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging bag. [Background technology]

[0002] As a packaging bag for packaging contents (food, medicine, etc.), there is a vertically long packaging bag disclosed in Patent Document 1. In such a packaging bag, a line to be opened (the weakened portion described in Patent Document 1) is formed along the width direction near the end in the vertical direction in order to open the packaging bag. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2009 / 090930 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vertically elongated packaging bag, a tear line provided near the vertical end is used to tear the bag in the width direction near one end, thereby allowing the contents to be removed from the packaging bag. However, with a vertically elongated packaging bag, there is a problem in that, depending on the contents, it is difficult to remove the contents near the end opposite the side where the tear line is formed.

[0005] Therefore, an object of the present invention is to provide a packaging bag that improves the ease with which contents can be removed. [Means for solving the problem]

[0006] The packaging bag of the present invention is a pillow-shaped packaging bag having a tubular portion with a seam seal portion that seals opposing both end portions of a sheet of laminated film in a seam-like manner, and a first end seal portion and a second end seal portion that seal a first end of the tubular portion in the extension direction of the seam seal portion and a second end opposite the first end, and together with the seam seal portion form a storage space for the contents, the packaging bag has a first planned opening line for tearing the tubular portion, which is formed in the tubular portion closer to the first end seal portion and along a direction transverse to the extension direction, a second planned opening line for tearing the tubular portion, which is formed in the tubular portion closer to the second end seal portion and along a direction transverse to the extension direction, and a third planned opening line extending from the second open line towards the second end seal portion, and the breaking strength of each of the first planned opening line, second planned opening line and third planned opening line is 20N / 15mm or more and 40N / 15mm or less.

[0007] In the above configuration, for example, the packaging bag can be opened by first tearing the tubular portion using the first planned opening line. This allows the contents to be removed from the first end side. Next, the tubular portion can be broken using the second planned opening line. This makes it easy to remove the contents located on the second end side. After breaking the tubular portion using the second planned opening line, the packaging bag can be opened by further tearing the tubular portion toward the second end seal portion using the third planned opening line. As a result, it is easy to remove the contents located on the second end side (especially the contents located at the corners, bottom, etc.). In this way, the packaging bag can be opened using three planned opening lines, improving the ease of removing the contents.

[0008] The third intended opening line may extend to the second end seal portion, which allows the packaging bag to be opened (or unfolded) more widely, further improving the ease of removing the contents.

[0009] The breaking strength of the second intended opening line may be greater than the breaking strength of the first intended opening line, in which case the user of the packaging bag can easily use the first intended opening line when opening the packaging bag for the first time.

[0010] When the breaking strength of the second opening line is greater than that of the first opening line, the breaking strength of the third opening line may be greater than that of the second opening line. In this case, a user of the packaging bag can easily open the packaging bag by using the first opening line, the second opening line, and the third opening line in this order.

[0011] There may be two or more third intended opening lines, which makes it easier to open the packaging bag, further improving the ease of removing the contents.

[0012] The packaging bag according to one embodiment may further include a fourth planned opening line extending from the first planned opening line toward the first end seal portion, and the breaking strength of the fourth planned opening line may be 20 N / 15 mm or more and 40 N / 15 mm or less. In this case, for example, when initially opening the packaging bag, the contents can be easily removed regardless of whether the first planned opening line or the second planned opening line is used first. [Effects of the Invention]

[0013] According to the present invention, a packaging bag can be provided that allows the contents to be easily removed. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a plan view of a packaging bag according to one embodiment. [Figure 2] FIG. 2 is a schematic diagram of a cross-sectional configuration of the packaging bag taken along line II-II in FIG. [Figure 3] FIG. 3 is a schematic diagram illustrating the layer structure of the laminated film of the packaging bag. [Figure 4] FIG. 4 is a diagram for explaining a modified example of the third planned opening line. [Figure 5]FIG. 5 is a diagram for explaining a method for measuring the breaking strength of the intended opening line of a packaging bag. [Figure 6] FIG. 6 is a diagram for explaining a modified example of the packaging bag. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same elements are given the same reference numerals. Duplicate explanations will be omitted. The dimensional ratios of the drawings do not necessarily match those in the description.

[0016] Fig. 1 is a plan view of a packaging bag according to one embodiment. Fig. 2 is a schematic diagram of the cross-sectional structure of the packaging bag taken along line II-II in Fig. 1. Fig. 3 is a diagram schematically showing the layer structure of a laminated film that constitutes the packaging bag shown in Fig. 1.

[0017] The packaging bag 2 shown in Figures 1 and 2 is a pillow-shaped packaging bag that contains a content 4. Examples of the content 4 include medicines and food. The content 4 contained in the packaging bag 2 may be, for example, a spherical (or granular) content 4, a powdery content 4, or a jelly-like content 4. Figure 2 schematically shows a spherical (or granular) medicine as the content 4. The layer structure of the laminated film 6 is not shown in Figure 2.

[0018] The packaging bag 2 has a tubular portion 10 having a seam seal portion 8 (back seal portion) that seals opposing side edges 6a of a single laminate film 6 in a seam-like manner, and a top seal portion (first end seal portion) 14 and a bottom seal portion (second end seal portion) 16 that seal a first end 10a and a second end 10b (the ends opposite to the first end 10a) of the tubular portion 10 in the extension direction of the seam seal portion 8 and, together with the seam seal portion 8, form a storage space 12 for the contents 4. In FIG. 1, the top seal portion 14 and the bottom seal portion 16 are hatched to clearly show them. The seam seal portion 8, the top seal portion 14, and the bottom seal portion 16 may be sealed by a sealing method (e.g., heat sealing) that is commonly used in the field of pillow-type packaging bags.

[0019] For ease of explanation, the surface of the packaging bag 2 on which the palm-seamed seal portion 8 is formed will be referred to as the back surface, and the side opposite the back surface will be referred to as the front surface.

[0020] The packaging bag 2 has a vertically elongated shape in which the length L1 in the extension direction of the seam seal portion 8 is longer than the length L2 in the width direction (direction perpendicular to the extension direction) when viewed from the front side (or back side) of the packaging bag 2. Therefore, the extension direction of the seam seal portion 8 is sometimes referred to as the vertical direction.

[0021] An example of the length L1 in the vertical direction of the packaging bag 2 is 50 mm or more and 150 mm or less. An example of the length L2 in the width direction of the packaging bag 2 is 10 mm or more and 50 mm or less. An example of the length L3 between the top seal portion 14 and the bottom seal portion 16 of the packaging bag 2 is 40 mm or more and 140 mm or less.

[0022] 3, the laminated film 6 has a base material layer 61, an intermediate layer 62, and a sealant layer 63. The base material layer 61, the intermediate layer 62, and the sealant layer 63 are laminated in this order.

[0023] The base material layer 61 corresponds to the outer layer of the packaging bag 2. An example of the thickness of the base material layer 61 is 12 μm or more and 25 μm or less. Various materials are used for the base material layer 61 depending on the purpose of the packaging bag 2. Specifically, the material for the base material layer 61 can be selected from the following: polyester-based resins such as oriented polypropylene resin (OPP), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), and polyethylene naphthalate resin (PEN); cellophane; cellulose-based resins such as cellulose triacetate (TAC) resin; polymethyl methacrylate resin (PMMA); ionomer resin; polyamide-based resins (NY) such as nylon-6 and nylon-66; polystyrene-based resin (PS); polyvinylidene chloride resin (PVDC); polycarbonate resin (PC); and other synthetic resin films and paper sheets.

[0024] The intermediate layer 62 is a layer disposed between the base layer 61 and the sealant layer 63. The thickness of the intermediate layer 62 is, for example, 6 μm to 40 μm. The intermediate layer 62 may be made of the same material as the base layer 61, or may be made of a metal foil (e.g., aluminum foil). Various gas barrier layers that inhibit the permeation of oxygen and water vapor may also be used for the intermediate layer 62. Examples of gas barrier layers that can be used include gas barrier films such as polyvinylidene chloride films, polyvinyl alcohol films, ethylene-vinyl alcohol copolymer films, gas barrier nylon films, and gas barrier polyethylene terephthalate (PET) films; metal-deposited films in which a metal such as aluminum is deposited on a PET film; inorganic oxide-deposited films in which an inorganic oxide such as aluminum oxide or silicon oxide is deposited on a PET film; and gas barrier coating layers such as polyvinylidene chloride coatings, resin layers formed from coatings containing a water-soluble resin and an inorganic layered compound, or coatings formed by reacting a metal alkoxide or its hydrolyzate with an isocyanate compound.

[0025] The sealant layer 63 corresponds to the inner layer of the packaging bag 2. An example of the thickness of the sealant layer 63 is 10 μm or more and 50 μm or less. Polyolefin resins are generally used for the sealant layer 63, and specific examples include ethylene resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer, and polypropylene resins such as blend resins of polyethylene and polybutene, homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer.

[0026] In the laminated film 6, printing may be applied to the inner layer (sealant layer 63) side of the base material layer 61. In this case, it is preferable that the base material layer 61 has predetermined printing characteristics.

[0027] The base layer 61, intermediate layer 62, and sealant layer 63 are laminated by a dry lamination method using an adhesive, an extrusion lamination method in which a resin (such as a polyethylene resin) is extruded from a T-die, or the like. In Figure 3, the adhesive and other elements are not shown.

[0028] Examples of the layer structure of the laminated film 6 include the following: "AL foil" in the following layer structure examples means aluminum foil.

[0029] (1) Layer structure example 1: PET film / PE film / AL foil / polyethylene (PE) film The PET film corresponds to the base layer 61. The thickness of the PET film is, for example, 12 μm or more and 25 μm or less. The PE film corresponds to the sealant layer 63. The thickness of the PE film is, for example, 20 μm or more and 50 μm or less. The laminated portion of the PE film and the AL foil disposed between the PET film and the PE film corresponds to the intermediate layer 62. The thickness of the PE film is, for example, 15 μm or more and 30 μm or less, and the thickness of the AL foil is, for example, 7 μm or more and 20 μm or less.

[0030] (2) Layer structure example 2: PBT film / PE film / AL foil / PE film Layer Configuration Example 2 is the same as Layer Configuration Example 1, except that a PBT film is used instead of the PET film of Layer Configuration Example 1. The thickness of the PBT film is, for example, 10 μm or more and 25 μm or less.

[0031] (3) Layer structure example 3: NY film / PE film / AL foil / PE film Layer Configuration Example 3 is the same as Layer Configuration Example 1, except that a NY film is used instead of the PET film of Layer Configuration Example 1. The thickness of the NY film is, for example, 15 μm or more and 25 μm or less.

[0032] (4) Layer structure example 4: Cellophane / PE film / AL foil / PE film Layer Configuration Example 4 is the same as Layer Configuration Example 1, except that cellophane is used instead of the PET film of Layer Configuration Example 1. An example of the cellophane is #300 cellophane (30 g / m 2 (cellophane).

[0033] (5) Layer structure example 5: paper sheet / PE film / AL foil / PE film, Layer Configuration Example 5 is the same as Layer Configuration Example 1, except that a paper sheet is used instead of the PET film of Layer Configuration Example 1. An example of the basis weight of the paper sheet is 50 g / m 2 ~120g / m 2 is.

[0034] (6) Layer structure example 6: OPP film / PE film / AL foil / PE film Layer Configuration Example 6 is the same as Layer Configuration Example 1, except that an OPP film is used instead of the PET film of Layer Configuration Example 1. The thickness of the OPP film is, for example, 20 μm or more and 30 μm or less.

[0035] The top seal portion 14 is the portion where the first end 10a of the tubular portion 10 is sealed. The bottom seal portion 16 is the portion where the second end 10b of the tubular portion 10 is sealed. The vertical lengths of the top seal portion 14 and the bottom seal portion 16 may be the same or different.

[0036] As shown in FIG. 1, the packaging bag 2 has a first planned opening line 18A, a second planned opening line 18B, and a third planned opening line 18C for opening the packaging bag 2.

[0037] The first intended opening line 18A is formed closer to the top seal portion 14 in the tubular portion 10. The length d between the first intended opening line 18A and the top seal portion 14 T is not limited to, but is, for example, one tenth or more and one third or less of the length L3 between the top seal portion 14 and the bottom seal portion 16 of the packaging bag 2.

[0038] In this embodiment, the first planned opening line 18A is a line (break line) for initially breaking the packaging bag 2 (specifically, the tubular portion 10) in order to remove the contents 4 from the packaging bag 2. The first planned opening line 18A is formed in a direction transverse to the vertical direction when the packaging bag 2 is viewed in plan (when viewed from the front or back). In one embodiment, the first planned opening line 18A is formed in the width direction (a direction perpendicular to the vertical direction). The first planned opening line 18A goes all the way around the tubular portion 10 in the circumferential direction.

[0039] The first intended opening line 18A is a solid or dashed half-cut line that penetrates the base layer 61 of the laminated film 6. If the laminated film 6 has a gas barrier layer such as aluminum foil, the first intended opening line 18A is formed so as not to penetrate the gas barrier layer. FIG. 1 illustrates an example of the first intended opening line 18A as a perforation line in which multiple fragile portions 18a are formed along the circumferential direction of the tubular portion 10. The fragile portions 18a are, for example, cut portions in the base layer 61.

[0040] The second intended opening line 18B is formed closer to the bottom seal portion 16 in the tubular portion 10. The length d between the second intended opening line 18B and the bottom seal portion 16 D is not limited to, but is, for example, one tenth or more and one third or less of the length L3 between the top seal portion 14 and the bottom seal portion 16 of the packaging bag 2.

[0041] The length d between the first and second planned opening lines 18A and 18B is, for example, one-third or more of the length L3 between the top seal portion 14 and the bottom seal portion 16 of the packaging bag 2. In one embodiment, the length d may be one-and-a-half or less of the length L3. In one embodiment, the length d may be 30 mm or more. The second planned opening line 18B is a line (tear line) for further tearing the packaging bag 2 (specifically, the tubular portion 10) to facilitate removal of the contents 4 from the bottom seal portion 16 side after a certain amount of contents 4 has been removed from the packaging bag 2 opened using the first planned opening line 18A. The second planned opening line 18B is formed in a direction transverse to the vertical direction when the packaging bag 2 is viewed from above (when viewed from the front or back). In one embodiment, the second planned opening line 18B is formed in the width direction (a direction perpendicular to the vertical direction). The second planned opening line 18B goes around the tubular portion 10 in the circumferential direction.

[0042] Similar to the first planned opening line 18A, the second planned opening line 18B is a solid or dashed half-cut line that penetrates the base material layer 61 of the laminated film 6. When the laminated film 6 has a gas barrier layer such as aluminum foil, the second planned opening line 18B is formed so as not to penetrate the gas barrier layer. In FIG. 1, similar to the first planned opening line 18A, the second planned opening line 18B is illustrated as a perforated line in which multiple fragile portions 18a are formed along the circumferential direction of the tubular portion 10. The fragile portions 18a are, for example, cut portions in the base material layer 61.

[0043] The third planned opening line 18C is formed from the second planned opening line 18B toward the bottom seal portion 16. That is, the third planned opening line 18C is formed in the vertical direction when the packaging bag 2 is viewed in plan (when viewed from the front or back). The third planned opening line 18C can be formed on the front surface of the packaging bag 2 (the side opposite to the joint seal portion 8).

[0044] The third planned opening line 18C may be formed so as to contact the bottom seal portion 16 as shown in Fig. 1, or may not reach the bottom seal portion 16 as shown in Fig. 4. The third planned opening line 18C is a line (break line) for breaking the packaging bag 2 (specifically, the tubular portion 10) so that the contents 4 can be easily removed after the packaging bag 2 has been broken using the second planned opening line 18B.

[0045] Like the first intended opening line 18A, the third intended opening line 18C is a solid or dashed half-cut line that penetrates the base layer 61 of the laminate film 6. If the laminate film 6 has a gas barrier layer such as aluminum foil, the third intended opening line 18C is formed so as not to penetrate the gas barrier layer. In FIG. 1 , like the first intended opening line 18A, the third intended opening line 18C is illustrated as a perforation line in which multiple fragile portions 18a are formed along the circumferential direction of the tubular portion 10. The fragile portions 18a are, for example, cut portions in the base layer 61. If the second intended opening line 18B is the perforation line described above, the third intended opening line 18C preferably contacts the fragile portions 18a of the second intended opening line 18B. If the third intended opening line 18C is also a perforation line, the fragile portions 18a of the third intended opening line 18C preferably contact the second intended opening line 18B. In this case, the packaging bag 2 can be easily torn along the third intended opening line 18C.

[0046] The first intended opening line 18A, the second intended opening line 18B, and the third intended opening line 18C can be formed on the laminated film 6 by, for example, cutting with a blade (razor cutting), laser cutting, or the like.

[0047] The breaking strength of the first intended opening line 18A, the second intended opening line 18B, and the third intended opening line 18C is 20 N / 15 mm or more and 40 N / 15 mm or less. The breaking strength of the first intended opening line 18A, the second intended opening line 18B, and the third intended opening line 18C may be the same or different as long as it is within the above range.

[0048] For example, the breaking strength of the second intended opening line 18B may be greater than the breaking strength of the first intended opening line 18A. In this case, the breaking strength of the third intended opening line 18C may be greater than the breaking strength of the second intended opening line 18B.

[0049] The breaking strength can be measured using a method conforming to JIS K 7127:1999. A specific example will be described with reference to FIG. 5. FIG. 5 is a schematic diagram illustrating an example of a method for measuring the breaking strength of a planned tear line formed in a laminate film 6. In FIG. 5, the planned tear line to be measured is illustrated as planned tear line 18. To measure the breaking strength of the planned tear line 18, a test piece S having a width L4 of 15 mm is cut out from the laminate film 6 on which the planned tear line 18 is formed. Both ends are clamped between chucks 22 of a tensile strength measuring device 20, and the test piece S is pulled in the vertical direction (the longitudinal direction of the test piece S) while measuring the tensile strength (N / 15 mm) at the time of breakage. The measurement result is used as the breaking strength. At this time, the planned tear line 18 is positioned in the center between the upper and lower chucks 22. The pulling speed is, for example, 300 mm / min.

[0050] The packaging bag 2 can be manufactured, for example, as follows: A laminated film 6 having a rectangular planar shape is prepared. A first planned opening line 18A, a second planned opening line 18B, and a third planned opening line 18C are formed in the planned formation portions of the laminated film 6. The first planned opening line 18A, the second planned opening line 18B, and the third planned opening line 18C can be formed by the aforementioned blade processing, laser processing, or the like. Thereafter, a filling and packaging machine forms the gable seal portion 8, the top seal portion 14, and the bottom seal portion 16 so that the contents 4 are filled into the storage space 12, and the packaging bag 2 is sealed. This results in a packaging bag 2 containing the contents 4. The order of the manufacturing steps can be changed as appropriate.

[0051] The packaging bag 2 is opened using the first planned opening line 18A near the top seal portion 14. This allows the contents 4 to be removed from the packaging bag 2. The packaging bag 2 is pillow-shaped and has a vertically elongated shape. Therefore, it may be difficult to remove the contents 4 from the bottom seal portion 16 side.

[0052] In contrast, the packaging bag 2 has a second planned opening line 18B closer to the bottom seal portion 16. Therefore, by further tearing the packaging bag 2 using the second planned opening line 18B, it is easy to remove the contents 4 on the bottom seal portion 16 side.

[0053] The packaging bag 2 further has a third planned opening line 18C. By tearing the packaging bag 2 along the second planned opening line 18B, the end of the third planned opening line 18C on the second planned opening line 18B side is positioned at the opening created by tearing the packaging bag 2 along the second planned opening line 18B. This makes it possible to tear the packaging bag 2 vertically using the third planned opening line 18C. As a result, the packaging bag 2 can be opened (or unfolded), making it easier to remove the contents 4 near the bottom seal portion 16. For example, contents 4 located at corners or the bottom near the bottom seal portion 16 can be more reliably removed. This allows the contents 4 of the packaging bag 2 to be effectively used. In particular, when the contents 4 are granular, the packaging bag 2 is effective because it makes it easy to remove granular material remaining at corners or the bottom near the bottom seal portion 16.

[0054] The breaking strength of the first planned opening line 18A, the second planned opening line 18B, and the third planned opening line 18C of the packaging bag 2 is 20 N / 15 mm or more and 40 N / 15 mm or less. As a result, even when a filling and packaging machine is used to make bags from the laminated film 6, the packaging bag 2 can be manufactured while preventing the laminated film 6 from breaking even if the above three planned opening lines are formed.

[0055] Therefore, in the packaging bag 2, ease of production using a filling and packaging machine is ensured, while the ease of removing the contents 4 is improved.

[0056] When the third planned opening line 18C extends from the second planned opening line 18B to the bottom seal portion 16, it is possible to further open (or unfold) the bottom seal portion 16 side of the packaging bag 2. As a result, it is easier to take out the contents 4 on the bottom seal portion 16 side.

[0057] If the breaking strength of the second planned opening line 18B is greater than the breaking strength of the first planned opening line 18A, it is easier for a user of the packaging bag 2 to open the packaging bag 2 by first using the first planned opening line 18A. With the packaging bag 2 of this embodiment, when removing the contents 4 from the packaging bag 2, it is assumed that the packaging bag 2 will be broken along the first planned opening line 18A, the second planned opening line 18B, and the third planned opening line 18C in this order. To encourage this use, for example, the opening order may be printed on the packaging bag 2 or an instruction manual may be attached. Even with such instructions, it is possible that a user may mistakenly attempt to open the packaging bag 2 starting from the second planned opening line 18B. As described above, if the breaking strength of the second planned opening line 18B is greater than the breaking strength of the first planned opening line 18A, it is more difficult to open the packaging bag 2 using the second planned opening line 18B than using the first planned opening line 18A. Therefore, the user can easily notice that they are using the container incorrectly, and as a result, the functions of the first intended opening line 18A, the second intended opening line 18B and the third intended opening line 18C work effectively, allowing the user to remove the contents 4 more easily.

[0058] If the breaking strength of the second intended opening line 18B is greater than the breaking strength of the first intended opening line 18A and the breaking strength of the third intended opening line 18C is greater than the breaking strength of the second intended opening line 18B, the packaging bag 2 can be easily broken using the first intended opening line 18A, the second intended opening line 18B and the third intended opening line 18C in this order.

[0059] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and is intended to include the scope indicated by the claims, and to include all modifications within the meaning and scope equivalent to the claims.

[0060] 1 illustrates an example in which the third planned opening line 18C is formed in the center in the width direction on the surface of the packaging bag 2. However, the third planned opening line 18C may be formed in a location other than the center in the width direction. For example, as shown in FIG. 6(a), the third planned opening line 18C may be formed near the edge of the surface when the packaging bag 2 is viewed in a plan view. In this case, the contents 4 near the corner of the packaging bag 2 closer to the bottom seal portion 16 can be easily removed.

[0061] As shown in (b) of Figure 6, the packaging bag 2 may further have a fourth planned opening line 18D formed from the first planned opening line 18A toward the top seal portion 14. The fourth planned opening line 18D is the same as the third planned opening line 18C, except that it is formed on the top seal portion 14 side. Therefore, the fourth planned opening line 18D may also extend to the top seal portion 14, or it may not necessarily reach the top seal portion 14. The breaking strength of the fourth planned opening line 18D is 20 N / 15 mm or more and 40 N / 15 mm or less.

[0062] In a packaging bag 2 having the fourth planned opening line 18D, either the first planned opening line 18A or the second planned opening line 18B can be used when first opening the packaging bag 2. Even if the packaging bag 2 is designed so that the first planned opening line 18A is used first to open the packaging bag 2 (for example, if such instructions are written in the instruction manual or on the surface), there may be cases where the second planned opening line 18B is opened first. Even in such cases, since the fourth planned opening line 18D is formed on the side of the first planned opening line 18A, it is easy to remove the contents 4 on the top seal portion 14 side.

[0063] As shown in Fig. 6(c), third planned opening lines 18C may be formed near both edge portions of the surface when the packaging bag 2 is viewed in plan view. In this case, it is easy to remove the contents 4 near the corners on both edge sides of the surface near the bottom seal portion 16 of the packaging bag 2. The number of third planned opening lines 18C may be three or more.

[0064] The number of planned opening lines formed in a direction transverse to the vertical direction, such as the first planned opening line 18A and the second planned opening line 18B, may be three or more.

[0065] The above-described embodiments and modifications may be combined as appropriate without departing from the spirit of the present invention. [Example]

[0066] The present invention will be described in more detail by the following examples, but the present invention is not limited to these examples.

[0067] Example 1 In Example 1, a pillow-type packaging bag was manufactured as shown in Fig. 1. First, the structure of the manufactured packaging bag will be described.

[0068] The packaging bag had a tubular portion with a seam seal portion sealing the opposing side edges of a single laminated film in a seam-like manner, and a top seal portion and a bottom seal portion sealing both ends of the tubular portion in the extension direction (longitudinal direction) of the seam seal portion. The length of the packaging bag in the longitudinal direction (length L1 in Figure 1) was 100 mm, and the length in the width direction (length L2 in Figure 1) was 25 mm. The lengths of the top seal portion and the bottom seal portion were 7 mm.

[0069] The laminated film constituting the packaging bag was a laminated film having the layer structure of the above embodiment (Layer Structure Example 1). That is, the layer structure of the laminated film was as follows: The PE film with the following layer structure was a layer obtained by ruder processing. PET film / PE film / AL foil / PE film

[0070] The packaging bag had opening lines near the top seal and near the bottom seal. The opening line near the top seal is called the first opening line, and the opening line near the bottom seal is called the second opening line. The length between the first opening line and the top seal (length d in Figure 1) is T ) and the length between the second planned opening line and the bottom seal part (length d in Figure 1)D ) was 18 mm. The first and second opening lines were perpendicular to the vertical direction in a plan view of the packaging bag and were formed along the circumferential direction of the packaging bag. The first and second opening lines were parallel, and the distance between them was 30 mm.

[0071] The packaging bag had a third planned opening line formed on the front surface (the surface opposite to the seam seal side) in the widthwise center, extending from the second planned opening line to the bottom seal part.

[0072] The first, second, and third planned opening lines were half-cut lines formed only in the PET film, which was the base layer of the laminated film, and were perforated lines with multiple fragile portions discretely arranged. The lengths of the multiple fragile portions and the lengths between adjacent fragile portions in each of the first, second, and third planned opening lines were the same. The lengths of the fragile portions and the lengths between adjacent fragile portions in Example 1 are as shown in Table 1, and were designed to achieve the breaking strength shown in Table 1 while measuring the breaking strength using the breaking strength measurement method shown in Figure 5 (a method conforming to JIS K 7127:1999). The tensile speed during the breaking strength measurement was 300 mm / min. The breaking strengths in the examples and comparative examples described below were also designed while measuring the breaking strength using the method shown in Figure 5.

[0073] The packaging bag contained several spherical drug models with a diameter of 3 mm as models of the contents.

[0074] The packaging bag containing the contents was produced as follows.

[0075] A laminated film having the above-described layer structure and a rectangular shape in plan view was prepared. A first planned opening line, a second planned opening line, and a third planned opening line were formed in the planned formation areas of the laminated film. The first planned opening line, the second planned opening line, and the third planned opening line were formed using a laser processing machine. Then, a filling and packaging machine was used to form the hem seal, top seal, and bottom seal, while filling the contents inside, to obtain a packaging bag containing the contents.

[0076] Examples 2 to 7 In each of Examples 2 to 7, packaging bags were produced with the same configuration as in Example 1, except that the breaking strength of the first, second, and third planned opening lines was changed as shown in Table 1. In each of Examples 2 to 7, the first, second, and third planned opening lines had the same configuration. That is, the lengths of the fragile portions and the lengths between adjacent fragile portions were the same in the first, second, and third planned opening lines. The breaking strength of the first, second, and third planned opening lines was adjusted by changing the lengths between adjacent fragile portions from those in Example 1 as shown in Table 1. The same number of contents (spherical drug models with a diameter of 3 mm) as in Example 1 were placed in each of the packaging bags in Examples 2 to 7.

[0077] (Comparative Examples 1 and 2) In each of Comparative Examples 1 and 2, packaging bags were produced with the same configuration as in Example 1, except that the breaking strengths of the first, second, and third planned opening lines were changed as shown in Table 1. However, as described below, in Comparative Examples 1 and 2, the laminated film broke when the bags were made using a filling and packaging machine. Therefore, in Comparative Examples 1 and 2, the packaging bags were produced manually. In each of Comparative Examples 1 and 2, the first, second, and third planned opening lines had the same configuration. That is, the lengths of the fragile portions and the lengths between adjacent fragile portions were the same for the first, second, and third planned opening lines. The breaking strengths of the first, second, and third planned opening lines were adjusted by changing the lengths between adjacent fragile portions from those in Example 1 as shown in Table 1. The same number of contents (3 mm diameter spherical drug models) as in Example 1 were placed in each of the packaging bags in Comparative Examples 1 and 2.

[0078] (Comparative Examples 3 and 4) In each of Comparative Examples 3 and 4, packaging bags were produced with the same configuration as in Example 1, except that the breaking strength of the first, second, and third planned opening lines was changed as shown in Table 1. In each of Comparative Examples 3 and 4, the first, second, and third planned opening lines had the same configuration. That is, the lengths of the fragile portions and the lengths between adjacent fragile portions were the same in the first, second, and third planned opening lines. The breaking strength of the first, second, and third planned opening lines was adjusted by changing the lengths between adjacent fragile portions from those in Example 1 as shown in Table 1. The same number of contents (spherical drug models with a diameter of 3 mm) as in Example 1 were placed inside each of the packaging bags in Comparative Examples 3 and 4.

[0079] (Comparative Example 5) In Comparative Example 5, a packaging bag was produced with the same configuration as in Example 1, except that the first, second, and third planned opening lines were not formed. Since the packaging bag of Comparative Example 5 does not have any weak parts corresponding to the first, second, and third planned opening lines, the columns related to the weak parts in Table 1 are left blank. The breaking strength of Comparative Example 5 in Table 1 corresponds to the breaking strength of the laminated film itself. The packaging bag of Comparative Example 5 contained the same number of contents (spherical drug models with a diameter of 3 mm) as in Example 1.

[0080] (Comparative Example 6) In Comparative Example 6, a packaging bag was produced that had the same configuration as in Example 1, except that it did not have a third planned opening line. The packaging bag of Comparative Example 6 contained the same number of contents (spherical drug models with a diameter of 3 mm) as in Example 1.

[0081] (Comparative Examples 7 and 8) In each of Comparative Examples 7 and 8, packaging bags were produced with the same configuration as in Example 1, except that the third planned opening line was not included and the breaking strength of the first and second planned opening lines was changed as shown in Table 1. In each of Comparative Examples 7 and 8, the first and second planned opening lines had the same configuration. That is, the lengths of the fragile portions and the lengths between adjacent fragile portions were the same in the first and second planned opening lines. The breaking strength of the first and second planned opening lines was adjusted by changing the lengths between adjacent fragile portions from those in Example 1 as shown in Table 1. The same number of contents (spherical drug models with a diameter of 3 mm) as in Example 1 were placed inside the packaging bags in each of Comparative Examples 7 and 8.

[0082] [Table 1]

[0083] (Evaluation method) Examples 1 to 7 and Comparative Examples 1 to 8 were evaluated from the following viewpoints. (1) Filling and packaging machine suitability When the laminated film (or the tubular portion) was made into a bag using a filling and packaging machine, if the bag could be made without breaking, it was given an evaluation of A, and if the bag broke when made into a bag using the filling and packaging machine, it was given an evaluation of B. If the product was classified as Evaluation B, the packaging bags were produced manually without using a filling and packaging machine, and other evaluations were carried out. (2) Unsealability The evaluation criteria for openability will be explained using the case of Example 1 as an example. In the packaging bag of Example 1, when the packaging bag was opened using the first planned opening line and the second planned opening line, if the bag was deviated by 3 mm or more from at least one of the first planned opening line and the second planned opening line when opened, it was evaluated as B, and otherwise it was evaluated as A. The packaging bags of Examples 2 to 7 and Comparative Examples 1 to 8 were also evaluated for ease of opening using the same criteria. (3) Feeling of use Forty panelists were asked to remove the contents (spherical drug models with a diameter of 3 mm) from the packaging bags of Examples 1 to 7 and Comparative Examples 1 to 8, and to evaluate them as "good" or "bad" from two perspectives: ease of removal and remaining amount. Regarding remaining amount, panelists were asked to evaluate whether or not all of the contents could be removed. Therefore, even if a certain amount of the multiple contents contained in the packaging bag could be easily removed, if all of the contents could not be removed, the bag was evaluated as "bad." The evaluation results were tallied, and packaging bags that received a "good" evaluation from 35 or more panelists were rated as "A," and the rest were rated as "B." In Examples 1 to 7 and Comparative Examples 1 to 5, when removing the contents from the packaging bag, the subjects were asked to open the packaging bag along the first planned opening line, the second planned opening line, and the third planned opening line in that order. In Comparative Examples 6 to 8, when removing the contents from the packaging bag, the subjects were asked to open the packaging bag along the first planned opening line and the second planned opening line in that order. (4) Overall Review If the evaluation results for the suitability for filling and packaging machines, ease of opening, and usability were all A, the product was rated as A, and if any of them were B, the product was rated as B.

[0084] The results of the above-mentioned suitability for filling and packaging machines, ease of opening, usability and overall evaluation are shown in Table 2. [Table 2]

[0085] By comparing the results of Examples 1 to 7 and Comparative Examples 6 to 8 shown in Table 2 with the results of Comparative Examples 1 to 3, it was verified that even when the first, second, and third planned opening lines are formed on the laminated film, bags can be made using a filling and packaging machine as long as the breaking strength is 20 N / 15 mm or more and 40 N / 15 mm or less. Furthermore, it was verified that the presence of the third planned opening line improves the usability, that is, when multiple spherical drug models are contained in the packaging bag, they can be easily removed and all of them can be removed. [Explanation of symbols]

[0086] 2...packaging bag, 4...contents, 6...laminated film, 6a...side end, 8...palm seal portion, 10...tubular portion, 10a...first end, 10b...second end, 12...storage space, 14...top seal portion (first end seal portion), 16...bottom seal portion (second end seal portion), 18A...first intended opening line, 18B...second intended opening line, 18C...third intended opening line, 18D...fourth intended opening line.

Claims

1. A pillow-shaped packaging bag having a tubular portion with a seam seal portion that seals opposing both end portions of a sheet of laminated film in a seam-like manner, and a first end seal portion and a second end seal portion that seal a first end of the tubular portion in an extending direction of the seam seal portion and a second end opposite to the first end, and that, together with the seam seal portion, form a storage space for contents, a first planned opening line for breaking the tubular portion, the first planned opening line being formed along a direction transverse to the extension direction in a portion of the tubular portion closer to the first end seal portion; a second planned opening line for breaking the tubular portion, the second planned opening line being formed along a direction transverse to the extension direction in a portion of the tubular portion closer to the second end seal portion; a third planned opening line extending from the second planned opening line toward the second end seal portion; and The breaking strength of each of the first planned opening line, the second planned opening line, and the third planned opening line is 20 N / 15 mm or more and 40 N / 15 mm or less, the first planned opening line and the second planned opening line extend around the cylindrical portion in a circumferential direction, The breaking strength of the second intended opening line is greater than the breaking strength of the first intended opening line, The breaking strength of the third intended opening line is greater than the breaking strength of the second intended opening line. packaging bag.

2. A pillow-shaped packaging bag having a tubular portion with a seam seal portion that seals opposing both end portions of a sheet of laminated film in a seam-like manner, and a first end seal portion and a second end seal portion that seal a first end of the tubular portion in an extending direction of the seam seal portion and a second end opposite to the first end, and that, together with the seam seal portion, form a storage space for contents, a first planned opening line for breaking the tubular portion, the first planned opening line being formed along a direction transverse to the extension direction in a portion of the tubular portion closer to the first end seal portion; a second planned opening line for breaking the tubular portion, the second planned opening line being formed along a direction transverse to the extension direction in a portion of the tubular portion closer to the second end seal portion; a third planned opening line extending from the second planned opening line toward the second end seal portion; and The breaking strength of each of the first planned opening line, the second planned opening line, and the third planned opening line is 20 N / 15 mm or more and 40 N / 15 mm or less, The breaking strength of the second intended opening line is greater than the breaking strength of the first intended opening line, The breaking strength of the third intended opening line is greater than the breaking strength of the second intended opening line. packaging bag.

3. The third intended opening line extends to the second end seal portion. The packaging bag according to claim 1 or 2.

4. The third opening planned line has two or more. The packaging bag according to any one of claims 1 to 3.

5. a fourth planned opening line extending from the first planned opening line toward the first end seal portion; The breaking strength of the fourth planned opening line is 20 N / 15 mm or more and 40 N / 15 mm or less, The packaging bag according to any one of claims 1 to 4.

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