JP7225573B2 - Pouch manufacturing method and pouch - Google Patents

Description

The present invention relates to a method for manufacturing a pouch and a pouch.

Conventionally, for example, pouches for sealing patches containing percutaneously permeable drugs such as external analgesics and antiphlogistic agents, foods such as health foods, etc., are formed with cuts or notches for easy opening of the pouch. ing. When such a pouch is opened from the notch or notch, the tear line on the front surface and the tear line on the back surface may overlap. When taking out the contents, the pouch is opened by pinching the front surface with one hand and the back surface with the other hand. Sometimes it is difficult to pick the front and back sides separately.

For this reason, an opening guide line is provided on each of the front and back surfaces, and a step is formed between the break line on the front surface and the break line on the back surface when the package is opened. A technique is known that makes it easier to pick up each back surface (see, for example, Patent Literature 1).

However, if an opening guide line is provided on each of the front surface and the back surface, the position of the opening guide line on the front surface and the unseal guide line on the back surface will be misaligned, and there is a risk that a step with a desired height will not be formed. . For this reason, it is currently being considered to provide an unsealing guide line only on the front surface (see Patent Document 2, for example).

JP 2014-51311 A JP 2018-76096 A

For pouches that have a wavy opening guide line only on the front side, it is formed on the front side depending on whether the pouch is opened facing the front or the pouch is opened facing the back. The shape of the broken line is different.

Normally, a pattern is often printed on the pouch, but as a wavy opening guide line formed only on the front surface, a crest having one peak and a valley having one valley bottom are formed between the side seals. In the case of forming an opening guide line of one wavelength consisting of a part, if the position of the opening guide line is shifted with respect to the pattern, a step of a desired height can be formed when the pouch is opened with the pouch facing forward. , when the package is opened toward the inner side, it may not be possible to form a step of a desired height, or vice versa. For this reason, in the case of forming an opening guide line with a laser, each pouch has to have a level difference of a desired height regardless of whether the pouch is opened in the front side or the back side. It is necessary to align the position of the unsealing guide line with the picture, but if such alignment is performed, there is a problem that the manufacturing speed of pouches is slowed down in the case of continuously manufacturing pouches.

The present invention has been made to solve the above problems. That is, a method for manufacturing a pouch that is suitable for high-speed manufacturing and that can form a step of a desired height when the pouch is opened facing either the front side or the back side, and a pouch that can be opened in either the front side or the back side. To provide a pouch capable of forming a step of a desired height even when opened in the direction of .

According to one aspect of the present invention, a wavy opening guide line that includes at least a base material layer and a sealant layer, penetrates the base material layer, and extends continuously in a length direction that does not penetrate the sealant layer. and a step of unwinding the packaging material from the raw roll and cutting or folding the packaging material in half along the length direction of the packaging material. , in a state in which the packaging materials cut in half or folded in half are superimposed so that the sealant layers face each other, the packaging materials are heat-sealed, and the first seal portion extending in the length direction is formed at a predetermined interval. A step of continuously obtaining a plurality of sealed bags by forming a plurality of second seal portions extending in the width direction of the packaging material; a step of forming an unsealing start means consisting of a cut or a notch in each of the second seal portions; and a step of singulating the bag body, wherein the raw roll includes: The opening guide line of the packaging material is formed only within a half region in the width direction of the packaging material, and at least a part of the opening guide line exists between the opening start means and the second The total number of maximum points and minimum points between the inner edges of the seal portion is 3 or more, and a tangent to the opening guide line at an intersection of the opening guide line and the virtual line connecting the inner edge of the opening start means is the virtual line. A method for manufacturing a pouch is provided that is formed to have an angle of 1° or more and 45° or less with respect to .

In the packaging material in the pouch manufacturing method, the tear propagation resistance in a first direction parallel to the length direction of the packaging material is smaller than the tear propagation resistance in a second direction perpendicular to the first direction of the packaging material. may

According to another aspect of the present invention, the wavy opening guide line includes at least a base material layer and a sealant layer, penetrates the base material layer, and extends continuously in the length direction without penetrating the sealant layer. and a second raw roll wound with a second packaging material that includes at least a base layer and a sealant layer and does not have an opening guide line A step of preparing, unwinding the first packaging material from the first raw roll, and unwinding the second packaging material from the second raw roll, so that the sealant layers face each other, the first In a state where the packaging material and the second packaging material are superimposed, the first packaging material and the second packaging material are heat-sealed to form a first sealing portion extending in the length direction and a width of the packaging material. a step of continuously obtaining a plurality of sealed bags by forming a plurality of second sealing portions extending in a direction; forming an unsealing start means consisting of a notch or a notch in the second seal portion of the bag; and separating the bag into pieces. , in the first raw roll, the opening guide line of the first packaging material is at least partially present between the opening start means, and is the sum of the maximum and minimum points between the inner edges of the second seal portion The number is 3 or more, and the tangent line of the opening guide line at the intersection of the imaginary line connecting the inner edge of the opening guide line and the opening start means has an angle of 1° or more and 45° or less with respect to the imaginary line. A method of manufacturing a pouch is provided, wherein the pouch is formed to:

In the second packaging material in the pouch manufacturing method, the tear propagation resistance in a first direction parallel to the length direction of the second packaging material is in a second direction perpendicular to the first direction of the second packaging material. It may be less than the tear propagation resistance.

According to another aspect of the present invention, there is provided a pouch having a front side and a back side and formed using a packaging material including at least a base layer and a sealant layer, the pouch comprising: a first end; a second end opposite the first end; a third end and a fourth end respectively extending between the first end and the second end; An end seal portion formed at each of the fourth ends, an unsealing starting means formed on each of the end seal portions and comprising a notch or a notch, and formed only on the front surface or the back surface. a wavy unsealing guide line at least partially present between the unsealing initiation means, penetrating the base layer and not penetrating the sealant layer and extending continuously, wherein the unsealing guide line , from the inner edge of at least one of the end seals to the inner edge of the other end seal portion, and between the inner edges of the end seals, the total number of maximum points and minimum points of the opening guide line is 3 The pouch has a tangent to the opening guide line at the intersection of the virtual line connecting the opening guide line and the inner edge of the opening start means at an angle of 1° or more and 45° or less with respect to the virtual line. provided.

The pouch may further comprise resealable means, and the unsealing start means and the unsealing guide line may be located closer to the first end than the resealable means.

The pouch further comprises an end seal formed at the first end, wherein the inner edge of the end seal formed at the first end and the first end side of the resealable means D>h may be satisfied, where D is the distance between the edges and h is the height of the opening guide line.

In the pouch, the tear propagation resistance in the first direction parallel to the imaginary line is reduced to the second direction perpendicular to the first direction on the surface on which the opening guide line is not formed, out of the front surface and the back surface. It may be less than the directional tear propagation resistance.

The pouch may contain contents.

According to one aspect of the present invention, there is provided a method for manufacturing a pouch that is suitable for high-speed manufacturing and capable of forming a step of a desired height when the pouch is opened in either the front side or the back side. can do. According to another aspect of the present invention, it is possible to form a step of a desired height when the pouch is opened in either the front side or the back side.

1 is a front view of a pouch according to an embodiment; FIG. Figure 2 is a rear view of the pouch shown in Figure 1; FIG. 2 is a front view for explaining the dimensions of each component of the pouch shown in FIG. 1; It is a figure which shows the other unsealing start means which concerns on embodiment. 1 is a cross-sectional view of a packaging material used for a pouch according to an embodiment; FIG. Fig. 10 is a front view of another pouch according to the embodiment; Figure 7 is a rear view of the pouch shown in Figure 6; Fig. 10 is a front view of another pouch according to the embodiment; Fig. 10 is a front view of another pouch according to the embodiment; FIG. 10 is a front view for explaining the dimensions of each component of the pouch shown in FIG. 9; Fig. 10 is a front view of another pouch according to the embodiment; 1. It is a schematic diagram showing a state when the pouch shown by FIG. 1 is opened. 1. It is a figure which shows typically the manufacturing process of the pouch shown by FIG. 1. It is a figure which shows typically the manufacturing process of the pouch shown by FIG. 1. It is a figure which shows typically the manufacturing process of the pouch shown by FIG. 1. It is a figure which shows typically the manufacturing process of the pouch shown by FIG. FIG. 7 is a diagram schematically showing a manufacturing process of the pouch shown in FIG. 6; FIG. 7 is a diagram schematically showing a manufacturing process of the pouch shown in FIG. 6; FIG. 9 is a diagram schematically showing a manufacturing process of the pouch shown in FIG. 8; FIG. 9 is a diagram schematically showing a manufacturing process of the pouch shown in FIG. 8;

Hereinafter, pouches according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a pouch according to this embodiment, FIG. 2 is a rear view of the pouch shown in FIG. 1, and FIG. It is a front view. FIG. 4 is a diagram showing another opening start means according to the embodiment, and FIG. 5 is a cross-sectional view of the packaging material used for the pouch according to this embodiment. 6, 8, 9, and 11 are front views of other pouches according to this embodiment, FIG. 7 is a rear view of the pouch shown in FIG. 6, and FIG. 10 is a pouch shown in FIG. is a front view for explaining the dimensions of each component of the. FIG. 12 is a schematic diagram showing how the pouch according to the embodiment is opened. 13 to 16 are diagrams schematically showing the manufacturing process of the pouch shown in FIG. 1, and FIGS. 17 and 18 are diagrams schematically showing the manufacturing process of the pouch shown in FIG. 19 and 20 are diagrams schematically showing manufacturing steps of the pouch shown in FIG.

<<<Pouch>>>
The pouch 10-1 shown in FIGS. 1 and 2 has a containing space for containing a content C. As shown in FIG. The content C is not particularly limited, but examples thereof include patches containing percutaneous drugs such as external analgesics and antiphlogistic agents, insect repellent patches, foods such as health foods, tea bags such as green tea, and the like. be done.

The pouch 10-1 has a front surface 11 and a back surface 12. As shown in FIG. The length L (see FIG. 3) of the pouch 10-1 is not particularly limited, but may be, for example, 80 mm or more and 200 mm or less. A width W1 (see FIG. 3) of the pouch 10-1 is not particularly limited, but may be, for example, 100 mm or more and 300 mm or less.

Pouch 10-1 includes a first end 13, a second end 14 opposite first end 13, and a third end 15 extending between first end 13 and second end 14. and a fourth end 16 extending between the first end 13 and the second end 14 and opposite the third end 15 .

The pouch 10-1 has an end seal portion 17 formed at the first end portion 13, an end seal portion 18 formed at the second end portion 14, and an end seal portion formed at the third end portion 15. A portion 19 and an end seal portion 20 formed at the fourth end portion 16 . In addition, the pouch 10-1 is provided with opening start means 21 and 22 and an opening guide line 23. As shown in FIG.

<<End seal part>>
The end seal portions 17 to 20 are portions where a portion of the packaging material 30 forming the front surface 11 and a portion of the packaging material 30 forming the back surface 12 are joined together. The end seal portions 17 to 20 are formed by heat-sealing the packaging materials 30 to each other.

The width W2 (see FIG. 3) of the end seal portions 17 to 20 is preferably, for example, 5 mm or more and 15 mm or less. If the width of each of these seal portions is 5 mm or more, it is possible to achieve a reliable seal. In this specification, the "width" of each seal means the length in the direction perpendicular to the extending direction of the seal. When the width of the seal portion is not constant, the width of the seal portion is the shortest value among the lengths in the direction orthogonal to the extending direction of the seal portion.

<<Opening method>>
The opening start means 21 and 22 function as a starting point for opening. The unsealing start means 21 is formed in the end seal portion 19 , and the unsealing start means 22 is formed in the end seal portion 20 . By forming the opening start means 21 and 22 on the end seal portions 19 and 20, the pouch 10-1 can be easily opened from either the end seal portion 19 side or the end seal portion 20 side. . An imaginary line IL connecting the inner edge 21A of the opening start means 21 and the inner edge 22A of the opening start means 21 extends along the width direction DR1 of the pouch 10-1.

The opening start means 21 and 22 are V-shaped notches as notches. The opening initiation means 21 and 22 may be cuts (see FIG. 4(A)), or other shapes such as U-shaped notches (see FIG. 4(B)).

<<Open guidance line>>
An opening guide wire 23 is formed on the front surface 11 . Although the opening guide line 23 is formed on the front surface 11 in FIG. 1, it may be formed on the back surface instead of the front surface. That is, the unsealing guide line may be formed on the front surface or the back surface.

The unsealing guide wire 23 is in the shape of a continuously extending wavy line. "Continuously extending" in this specification is a concept that does not include broken lines. If the opening guide line is a broken line, there is a risk that the breaking line will deviate from the opening guide line between the lines of the opening guide line when the package is unsealed. In this case, the breaking line is difficult to come off from the opening guide line 23. - 特許庁The wavy line is preferably a sinusoidal wavy line. Also, the wavelength of the wavy line does not necessarily have to be uniform. Since the unsealing guide wire 23 has a wavy line shape, it has peaks 23A and valleys 23B.

The unsealing guide wire 23 is a wire that penetrates the base material layer 31 described later and does not penetrate the sealant layer 32 . When the packaging material 30, which will be described later, further includes a metal foil layer 35 between the base material layer 31 and the sealant layer 32, the metal foil layer 35 maintains the barrier properties of the accommodation space. It must not penetrate layer 35 . The opening guide wire 23 can be formed by laser.

At least a portion of the opening guide wire 23 exists between the opening start means 21 and 22 and extends in the width direction DR1 of the pouch 10-1. That is, the opening guide line 23 has an intersection with the imaginary line IL.

Moreover, the opening guide wire 23 is preferably formed in a region between the inner edge 17A of the end seal portion 17 and the contents C. As shown in FIG. The end seal portion is hard and difficult to break, and if the break line collides with the contents when the package is opened, there is a risk that the breakage will be stopped by the contents. The area between and is an unsealed portion, and it is possible to prevent the breaking line from colliding with the contents.

Between the inner edge 19A of the end seal portion 19 and the inner edge 20A of the end seal portion 20, the total number of maximum points P1 and minimum points P2 of the opening guide line 23 is 3 or more. The total number of maximum points and minimum points of the opening guidance line is 3 or more means that the opening guidance line may have 2 or more maximum points and 1 or more minimum points, or may have 1 or more maximum points, and There may be two or more local minimum points. The total number of the maximum points P1 and the minimum points P2 of the opening guide line 23 may be 10 or less from the viewpoint of suppressing the width of the knob portion from becoming too small.

A tangent line TL of the opening guide line 23 at the intersection of the opening guide line 23 and the imaginary line IL forms an angle α of 1° or more and 45° or less with respect to the imaginary line IL. If the angle α of this tangent line TL with respect to the imaginary line IL is 1° or more, an effective step can be formed between the breaking line on the front surface 11 side and the breaking line on the back surface 12 when the package is opened. Further, if the angle of this contact TL with respect to the imaginary line IL is 45° or less, it is possible to prevent the force applied in the direction of escape from becoming greater than the force applied in the direction of opening when the package is opened. It can be torn along the opening guide line. Also, after opening, the width of the picking portion formed on the back surface 12 is not too small, so that it is easy to pick. The angle α means the smaller of the angles formed by the opening guide line and the imaginary line. The lower limit of the angle α is preferably 15° or more from the viewpoint of forming a higher step.

As shown in FIG. 2 , the back surface 12 does not have an opening guide line formed thereon, but the back surface 12 has a tear propagation resistance in a first direction parallel to the imaginary line IL, and a second direction perpendicular to the first direction. is preferably smaller than the tear propagation resistance of By having such a relationship of tear propagation resistance, it is possible to tear along the imaginary line IL without forming an opening guide line on the back surface 12, so that it is possible to suppress the occurrence of breakage. Such a back surface 12 can be composed of a straight cutting film. A straight cut film is a film that can be linearly torn in one direction. The straight cutting film has a smaller tear propagation resistance in the MD direction (the flow direction of the film) than in the TD direction (the direction perpendicular to the MD direction). The tear propagation resistance can be measured according to JIS K7128-2:1998 using a light load tear tester (Toyo Seiki Seisakusho Co., Ltd.). Specifically, the tear propagation resistance is first measured in a first direction along an imaginary line connecting the inner edge of the opening start means from the packaging material on the surface to be measured (for example, the back surface), and in a second direction orthogonal to the first direction. Rectangular samples of length 75 mm x width 63 mm are taken in each direction, a cut of 20 mm is made from the end in the center of the width direction, and the indicated value is read when the remaining 43 mm is torn with a light load tear tester. The value of the tear propagation resistance is obtained by dividing the tear force (N) obtained from the indicated value by the thickness (mm) of the packaging material. The measurement is performed 10 times in each direction, and the average value is adopted. When the rear surface 12 is composed of a straight cut film, at least one of the base layer and the sealant layer is made of the straight cut film. When a straight cutting film is used for the substrate layer, for example, Embret (registered trademark) PC manufactured by Unitika Ltd. can be used as the substrate layer. The tear propagation resistance of Emblet (registered trademark) PC in the MD direction is 20 mN, and the tear propagation resistance in the TD direction is 30 mN.

Pouch 10-1 is constructed from packaging material 30. As shown in FIG. The packaging material 30 comprises at least a base material layer 31 and a sealant layer 32, as shown in FIG. The packaging material 30 may further include a functional layer that exhibits a desired function between the base layer 31 and the sealant layer 32 in addition to the base layer 31 and the sealant layer 32 . Specifically, between the substrate layer 31 and the sealant layer 32, an ink layer 33, a bonding layer 34, a metal foil layer 35, and a bonding layer 36 may be provided in this order from the substrate layer 31 side. .

<Base material layer>
The substrate layer 31 is not particularly limited, and examples thereof include a stretched plastic film, a plastic film such as cellophane, or paper. Examples of stretched plastic films include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamides such as nylon 6, nylon 6.6, nylon 12, and nylon 6.66 copolymer (Ny), or A film made of polypropylene (PP) or the like can be mentioned. Further, the substrate layer may have a single layer structure, or may have a multilayer structure of two or more layers. When the substrate layer has a multilayer structure, a bonding layer may be interposed between the substrate layers.

The stretched plastic film is preferably biaxially stretched. As a result, the molecules constituting the plastic film are aligned in the drawing direction by the drawing treatment, so that the plastic film exhibits excellent dimensional stability. In addition, the biaxial stretching treatment can impart easy-openability to the plastic film.

The thickness of the base material layer 31 is preferably 6 μm or more and 40 μm or less. If the thickness of the base material layer 31 is 6 μm or more, the metal foil layer 35 can be protected and printed. More preferably, the lower limit of the thickness of the substrate layer 31 is 12 μm or more, and the upper limit of the thickness of the substrate layer 31 is 30 μm or less. The thickness of the substrate layer is obtained by randomly measuring ten thicknesses from a cross-sectional photograph of the substrate layer taken with an optical microscope, and calculating the arithmetic mean value of the measured thicknesses.

<Sealant layer>
The sealant layer 32 is for forming the end seals 17-20. The sealant layer 32 can be made of a resin having sealing properties, such as polyolefin such as polyethylene (PE) or polypropylene, or polyester ether. Preferably, the sealant layer 32 is non-stretchable. The sealant layer 32 may be a single layer structure or a multi-layer structure.

The thickness of the sealant layer 32 is preferably 10 μm or more and 60 μm or less. If the thickness of the sealant layer 32 is 10 μm or more, it is possible to maintain the sealing strength necessary for preserving the contents. can achieve The lower limit of the thickness of the sealant layer 32 is more preferably 20 μm or more, and the upper limit of the thickness of the sealant layer 32 is more preferably 40 μm or less. The thickness of the sealant layer 32 can be measured by the same method as the thickness of the base material layer 31 .

<Ink layer>
The ink layer 33 is a layer containing a coloring material and a binder resin. By forming the ink layer 33, a pattern can be formed on the pouch 10-1. The term "picture" as used herein is not particularly limited, and broadly includes, for example, drawings, characters, designs, patterns, symbols, designs, marks, and the like.

The ink layer 33 may contain other optional additives. Additives include, for example, lubricants, antiblocking agents, fillers, curing agents, pigment dispersants, antifoaming agents, leveling agents, waxes, silane coupling agents, preservatives, antioxidants, ultraviolet absorbers, antirust agents, agents, plasticizers, flame retardants, color developers, and the like. These additives are used particularly for the purpose of improving printing suitability, printing effect, etc., and the type and amount used can be appropriately selected according to the printing method, printing substrate, and printing conditions. The ink layer 33 can be formed on the base material layer 31 by a printing method such as gravure printing.

(colorant)
The coloring material is not particularly limited, and known pigments and dyes can be used, and are appropriately selected according to the desired color.

(binder resin)
Examples of binder resins include linseed oil, tung oil, soybean oil, hydrocarbon oils, rosin, rosin esters, rosin-modified resins, shellac, alkyd resins, phenolic resins, maleic acid resins, natural resins, hydrocarbon resins, Polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, (meth) acrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd base resins, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, polymers of (meth)acrylate compounds, or mixtures thereof.

<Metal foil layer>
The metal foil layer 35 is for imparting gas barrier properties to the pouch 10-1. As the metal forming the metal foil layer 35, aluminum, iron, copper, tin, or alloys thereof are selected from the viewpoint of gas barrier properties for suppressing permeation of oxygen, water vapor, etc., and light shielding properties for suppressing permeation of visible light, ultraviolet rays, etc. etc. can be used.

The thickness of the metal foil layer 35 is preferably 6 μm or more and 40 μm or less. If the thickness of the metal foil layer 35 is 6 μm or more, gas barrier properties can be ensured, and if it is 40 μm or less, high-speed sealability and good unsealability can be achieved. More preferably, the lower limit of the thickness of the metal foil layer 35 is 7 μm or more, and the upper limit of the thickness of the metal foil layer 35 is 15 μm or less. The thickness of the metal foil layer can be measured by the same method as the thickness of the base material layer.

<Joining layer>
The term "bonding layer" as used herein is a concept including not only an adhesive layer but also an anchor coat layer. Examples of the bonding layers 34 and 36 include anchor coat layers used in extrusion lamination (sandwich lamination) and adhesive layers used in dry lamination.

Thermoplastic resins such as polyethylene-based resins, polypropylene-based resins, or cyclic polyolefin-based resins, or copolymer resins, modified resins, or mixtures (including alloys) containing these resins as main components can be used for the anchor coat layer. etc., but it may be a layer containing no resin. Polyolefin resins include, for example, low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), polypropylene (PP), metallocene catalyst Ethylene-α-olefin copolymer, ethylene-polypropylene random or block copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-α-olefin copolymer polymerized using Ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl methacrylate copolymer (EMMA), ethylene-maleic acid copolymer, ionomer resin, adhesion between layers In order to improve the above, it is possible to use an acid-modified polyolefin resin obtained by modifying the above polyolefin resin with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, or itaconic acid. can. Further, a resin obtained by graft polymerization or copolymerization of an unsaturated carboxylic acid, an unsaturated carboxylic acid anhydride, or an ester monomer can be used as the polyolefin resin. These materials can be used singly or in combination of two or more. Cyclic polyolefins such as ethylene-propylene copolymers, polymethylpentene, polybutene, and polynorbonene can be used as cyclic polyolefin resins. These resins can be used singly or in combination.

As the adhesive layer, for example, an adhesive generally used in a known dry lamination method can be used. Copolymer-based adhesives, cellulose-based adhesives, polyester-based adhesives, polyamide-based adhesives, amino-resin-based adhesives, epoxy-based adhesives, polyurethane-based adhesives, and the like can be used. A polyurethane adhesive means a cured product of a polyol compound and an isocyanate compound.

<<<Other pouches>>>
The pouch 10-1 shown in FIG. 1 is manufactured by cutting one sheet of packaging material 30 in half, as will be described later. It may be composed of any material. Pouch 10-2 is similar to pouch 10-1 except that it is constructed from first packaging material 41 and second packaging material 42.

The layer configurations of the first packaging material 41 and the second packaging material 42 are similar to the layer configuration of the packaging material 30 . However, the second packaging material 42 does not have an opening guide line. The layer configurations of the first packaging material 41 and the second packaging material 42 may be the same as each other, but they may also be different, for example, the second packaging material 42 may have a tear line on the back surface 12 that naturally follows. Although it is preferable that the first packaging material 41 is made of a straight-cuttable film in order to suppress , the first packaging material 41 does not have to be made of a straight-cuttable film.

The pouch 10-1 shown in FIG. 1 is a four-side-sealed pouch, but it may be a three-side-sealed pouch like the pouch 10-3 shown in FIG. Pouch 10-3 is similar to pouch 10-1 except that it does not have an end seal on the second end 14 side.

The pouch 10-1 shown in FIG. 1 does not have a resealable means, but may have a resealable means 51 like the pouch 10-4 shown in FIG.

The resealing means 51 is for resealing the opening after unsealing. By providing the resealing means 51, it is possible to suppress drying of the contents after opening. The resealable means 51 is provided so as to be substantially parallel to the imaginary line IL. Examples of the resealable means 51 include zipper tape.

The zipper tape includes a male tape member and a female tape member that can be fitted with the male tape member. When a zipper tape is used as the resealable means 51, one of the male tape member and the female tape member is attached to the inner surface of the front surface, and the other of the male tape member and the female tape member is attached to the back surface. attached to the inner surface of the

When the resealing means 51 and the end seal portion 17 are formed, the end seal portion 17 is hard and not easily broken, so that the inner edge 17A of the end seal portion 17 and the first end portion of the resealing means 51 are separated from each other. When the distance between the edges on the 13 side is D and the height h of the opening guide wire 23, it is preferable to satisfy D>h (see FIG. 10).

The pouch 10-1 shown in FIG. 1 does not have a gusset folding portion, but may have a gusset folding portion 61 like the pouch 10-5 shown in FIG. It is provided at the second end 14 in the pouch 10-5 shown in FIG. By providing gusset folds at the second end 14, it is possible to accommodate more contents and to stand on its own.

In the pouch 10-1 of the present embodiment, when the pouch 10-1 is torn from the opening start means 21 toward the front side and opened, the tear line on the front surface 11 side is Go in the unsealing direction DR2. When the fracture line on the front surface 11 side hits the valley portion 23B of the opening guide wire 23, it proceeds along the valley portion 23B, but when it hits the peak portion 23A, it does not proceed along the peak portion 23A. crosses the mountain portion 23A. On the other hand, when the pouch 10-1 is torn from the unsealing starting means 21 toward the inner side and unsealed, the tear line on the front surface 11 side proceeds in the unsealing direction DR2 until it hits the unsealing guide line 23. When the breaking line on the front surface 11 side hits the valley portion 23B of the opening guide wire 23, it crosses the valley portion 23B without proceeding along the valley portion 23B, and then hits the peak portion 23A. , along the peak 23A. If the opening guide line has a plurality of ridges and troughs, the breaking line on the front surface 11 side repeats these and advances. With respect to the back surface 12, since no opening guide line is formed on the back surface 12, the tear line of the back surface 12 follows by chance. Therefore, in the pouch 10-1 of the present embodiment, when the pouch 10-1 is opened from the opening starting means 21 toward the front side, the fracture line on the front surface 11 side is closer to the fracture line on the back surface 12 side than the fracture line on the back surface 12 side. Since the lower portion is formed, a recess 11A is formed in the front surface 11 (see FIG. 12A). Since the break line on the front surface 11 side is higher than the break line on the back surface 12 side, a convex portion 11B is formed on the front surface 11 (see FIG. 12B). Therefore, even when the pouch 10-1 is opened in either direction from the unsealing starting means 21 toward the near side or the far side, a step is formed. Incidentally, even when the pouch 10-1 is opened in either direction from the unsealing starting means 22 toward the near side or the far side, a step is similarly formed. Also, the pouches 10-2 to 10-5 are formed with steps similar to the pouch 10-1.

When tearing the pouch from the opening starting means toward the front side to open it, in order to obtain a desired level difference, it is necessary that the breaking line on the front surface passes through the minimum point, which is the bottom of the valley. Therefore, it is necessary for the opening guide line to have one or more minimum points. In order to obtain a step of a desired height when tearing the pouch from the unsealing starting means toward the back side, the breaking line of the front surface should Since it is necessary to pass through , it is necessary that one or more local maximum points exist in the opening guide line. Therefore, in order to obtain a step of a desired height when the pouch is torn open in either direction from the opening starting means to the front side or the back side, the opening guide line must have one or more maximum points and Must have one or more local minima. However, the first maximum point and minimum point on the unsealing starting means side do not affect breakage unless the breaking line on the front side hits. For this reason, when tearing the pouch in either direction from the opening start means to the front side or the back side to open the pouch, in order to reliably obtain a step of a desired height, the total number of maximum points and minimum points must be 3 or more. According to this embodiment, a continuously extending wavy opening guide line 23 having a total number of maximum points and minimum points of 3 or more is formed between the inner edges 19A and 20A of the end seal portions 19 and 20. Therefore, even when the pouch 10-1 is torn in either direction from the opening start means 21, 22 toward the front side or the back side, a step of a desired height can be obtained. As a result, it is possible to form a tab with a desired height, which facilitates opening. In addition, the pouches 10-2 to 10-5 can also have steps of a desired height in the same manner as the pouch 10-1, so that a knob of a desired height can be formed, making it easier to open. Become.

<<Manufacturing method of pouch>>
Such a pouch 10-1 can be manufactured as follows. An example of manufacturing the pouch 10-1 with a horizontal four-sided seal packaging machine is shown below.

First, an original fabric roll 71 wound with the packaging material 30 is prepared (see FIG. 13A). An opening guide line 23 extending in the length direction DR3 is formed in the packaging material 30 in advance by a laser. It is formed only within R1, and is not formed within the second region R2, which is the remaining half region of the packaging material 30 in the width direction DR4. The first region R1 is a region that becomes the front surface 11, and the second region R2 is a region that becomes the back surface 12. The first region R1 is a region that becomes a back surface, and the second region R2 is a region that becomes the front surface. It may be a region of

In the packaging material 30 of the original fabric roll 71, the opening guide line 23 is formed so that the total number of maximum points and minimum points is 3 or more between the inner edges 73A of the second seal portions 73, which will be described later. From the viewpoint of suppressing the width of the handle portion from becoming too small, the opening guide wire 23 is designed so that the total number of maximum points P1 and minimum points P2 of the opening guide wire 23 is 10 between the inner edges 73A of the second seal portion 73. It may be formed as follows.

Further, the opening guide line 23 is such that a tangent line TL of the opening guide line 23 at the intersection of the opening guide line 23 and the imaginary line IL connecting the inner edges 21A and 22A of the opening start means 21 and 22 to be formed later is on the imaginary line IL. 1° or more and 45° or less. The lower limit of the angle α is preferably 15° or more from the viewpoint of forming a larger step.

A laser for forming the opening guide line 23 is not particularly limited, but a carbon dioxide laser, a YAG laser, a semiconductor laser, an argon ion laser, or the like can be used.

After preparing the original roll 71, the packaging material 30 is unwound from the original roll 71, and the cutting device 81 cuts the packaging material 30 in half along the length direction DR3 of the packaging material 30 (see FIG. 13B). ).

After the packaging material 30 is cut in half, the packaging materials 30 are overlapped so that the sealant layers 32 face each other. After that, the contents C are filled between the packaging materials 30 (see FIG. 14(A)). Next, with the packaging material 30 superimposed, the first end 30A and the second end 30B extending in the length direction DR3 of the packaging material 30 are heat-sealed using the first sealing roll 82, and The third end portion 30C and the fourth end portion 30D formed by cutting in half are heat-sealed to form a first seal portion 72 having a predetermined width and extending in the length direction DR3 (see FIG. 14B). The first seal portion 72 is a portion that becomes the end seal portions 17 and 18 of the pouch 10-1 after the bag body 74 is singulated.

Further, using the second sealing roll 83, the packaging material 30 is heat-sealed in the width direction DR4 of the packaging material 30 at predetermined intervals to form a plurality of second seal portions 73 having a predetermined width extending in the width direction DR4. Thus, a plurality of sealed bags 74 are continuously obtained (see FIG. 15(A)). The second seal portion 73 is a portion that becomes the end seal portions 19 and 20 of the pouch 10-1 after the bag body 74 is singulated.

After obtaining the bag body 74, through holes 75 are formed in the second seal portions 73 of the bag body 74 (see FIG. 15B). A notch may be formed instead of the through hole. The through-holes 75 are portions that become opening start means 21 and 22 of the pouch 10-1 after the bag body 74 is separated into pieces.

Finally, the cutting device 84 cuts the bag body 74 along the width direction DR4 at the position where the through-hole 75 of the second seal portion 73 is divided into two pieces (see FIG. 16). As a result, the end seal portions 17 to 20 and opening initiation means 21 and 22 are formed, and the pouch 10-1 shown in FIG. 1 is obtained.

<<Other pouch manufacturing methods>>
The pouch 10-1 is formed by cutting one sheet of packaging material 30 in half to form the pouch 10-1. -2 can be produced by the following method.

First, a first material roll 91 wound with the first packaging material 41 and a second material roll 92 wound with the second packaging material 42 are prepared (see FIGS. 17A and 17B). An opening guide line 23 extending in the longitudinal direction DR3 is formed in the first packaging material 41 in advance by laser, but no opening guide line is formed in the second packaging material 42 .

In the first packaging material 41 of the first raw roll 91, the opening guide line 23 is formed such that the total number of maximum points and minimum points between the inner edges 73A of the second seal portions 73 is 3 or more. . The total number of maximum points P1 and minimum points P2 of the opening guide wire 23 between the inner edges 73A of the second seal portion 73 is set to 10 or less from the viewpoint of suppressing the width of the knob portion from being reduced. It may be formed so as to be

Further, the opening guide line 23 is such that the tangent line TL of the opening guide line 23 at the intersection of the imaginary line IL connecting the opening guide line 23 and the inner edges 21A and 22A of the opening start means 21 and 22 is 1° with respect to the imaginary line IL. It is formed to have an angle α of not less than 45° and not more than 45°. The lower limit of the angle α is preferably 15° or more from the viewpoint of forming a larger step.

After preparing the first material roll 91 and the second material roll 92, the first packaging material 41 is unwound from the first material roll 91, and the second packaging material 42 is unwound from the second material roll 92. Then, the first packaging material 41 and the second packaging material 42 are overlaid so that the sealant layers face each other. The first packaging material 41 and the second packaging material 42 are overlaid so that the length direction DR3 is aligned.

Next, with the first packaging material 41 and the second packaging material 42 superimposed, the content C is filled between the first packaging material 41 and the second packaging material 42 (see FIG. 18(A)). Thereafter, in the same manner as described above, the first sealing roll 82 is used to heat-seal the first end 41A of the first packaging material 41 and the first end 42A of the second packaging material 42 extending in the direction DR3. , the second end 41B of the first packaging material 41 and the second end 42B of the second packaging material 42 are heat-sealed to form a first sealing portion 72 of a predetermined width extending in the longitudinal direction DR3 (Fig. 18(B)). The first seal portion 72 is a portion that becomes the end seal portion 17 of the pouch 10-2 after the bag body 74 is singulated.

In addition, using the second sealing roll 83, the first packaging material 41 is heat-sealed at a predetermined interval in the width direction DR4 of the packaging material 70, and the second sealing portion 73 having a predetermined width extending in the width direction DR4 is formed. to obtain a sealed bag 74 (see FIG. 18(C)). The second seal portion 73 is a portion that becomes the end seal portions 19 and 20 of the pouch 10-3 after the bag body 74 is singulated.

After that, similarly to the above, a through hole is formed in each of the second seal portions 73 of the bag body 74, and a cutting device is used to divide the through holes of the second seal portion 73 into two along the width direction DR4. The bag body 74 is cut into individual pieces. As a result, the end seal portions 17 to 20 and the opening initiation means 21 and 22 are formed, and the pouch 10-2 shown in FIG. 6 is obtained.

Since the pouch 10-1 is a four-side-sealed pouch, it is manufactured by the above manufacturing method, but the three-side-sealed pouch 10-3 can be manufactured, for example, by the following method. An example of manufacturing the pouch 10-3 using a vertical three-sided seal packaging machine is shown below.

First, the original fabric roll 71 wound with the packaging material 30 having the opening guide line 23 used in the manufacturing process of the pouch 10-1 is prepared. After preparing the original roll 71, the packaging material 30 is unwound from the original roll 71, and the packaging material 30 is folded in half along the length direction DR3 of the packaging material 30 so that the sealant layers face each other (FIG. 19). (A)).

With the packaging material 30 folded in half, the first sealing roll 82 is used to heat-seal the first end portion 30A and the second end portion 30B extending in the length direction DR3 of the packaging material 30, thereby extending the length of the packaging material 30. A first seal portion 72 having a predetermined width extending in the direction DR3 is formed (see FIG. 19B). The first seal portion 72 is a portion that becomes the end seal portion 17 of the pouch 10-3 after the bag body 76 is separated into pieces.

In addition, using the second sealing roll 83, the packaging materials 70 are heat-sealed to each other in the width direction DR4 of the packaging material 70 at predetermined intervals to form the second seal portions 73 having a predetermined width extending in the width direction DR4. to obtain a sealed bag 76 (see FIG. 20). The second seal portion 73 is a portion that becomes the end seal portions 19 and 20 of the pouch 10-3 after the bag body 76 is singulated.

Moreover, the content C is filled during the process of obtaining the bag body 76 . Specifically, when focusing on one bag body 76, the content C is filled in a state in which one second seal portion 73 is formed.

After that, in the same manner as described above, a through hole is formed in each of the second seal portions 73 of the bag body 76, and a cutting device is used to divide the through holes of the second seal portion 73 into two along the width direction DR4. The bag body 76 is cut into individual pieces. As a result, the end seal portions 17 to 20 and opening initiation means 21 and 22 are formed, and the pouch 10-3 shown in FIG. 8 is obtained.

According to this embodiment, the continuously extending wavy opening guide line 23 is formed between the inner edge 73A of the second seal portion 73 so that the total number of the maximum points P1 and the minimum points P2 is 3 or more. Since the raw fabric roll 71 is used, when the pouch 10-1 is formed, the opening guide line 23 is the total number of the maximum points P1 and the minimum points P2 between the inner edges 19A and 20A of the end seal portions 19 and 20. is 3 or more. Further, if the total number of maximum points P1 and minimum points P2 between the inner edge 73A of the second seal portion 73 is 3 or more, the opening guide line 23 may be cut at any position, so that the ink layer 33 is formed. Even if there is, there is no need to align the design of the ink layer 33 and the unsealing guide wire 23. - 特許庁Thereby, the pouch 10-1 can be manufactured at high speed. For the same reason, the pouches 10-2 to 10-5 can also be manufactured at high speed.

10-1, 10-2, 10-3, 10-4, 10-5 Pouch 11 Front surface 12 Back surface 13 First end 14 Second end 15 Third end 16 Fourth end portions 17 to 20 End sealing portions 21, 22 Unsealing starting means 21A, 22A Inner edge 23 Unsealing guide line 23A Mountain portion 23B Valley portion 30 Packaging material 31 Base layer 32 Sealant layer 41 First packaging material 42 Second packaging material 51 Reopenable means 71 Raw fabric roll 72 First sealed portion 73 Second sealed portion 91 First raw roll 92 Second raw roll IL ... virtual line TL ... tangent line P1 ... maximum point P2 ... minimum point

Claims (9)

A raw roll wound with a packaging material including at least a base material layer and a sealant layer, and having a wavy opening guide line extending continuously in the length direction that penetrates the base material layer and does not penetrate the sealant layer. a step of preparing
A step of unwinding the packaging material from the original fabric roll and cutting or folding the packaging material in half along the length direction of the packaging material;
In a state where the packaging materials cut in half or folded in half are superimposed so that the sealant layers face each other, the packaging materials are heat-sealed to form the first sealing portion extending in the length direction and the sealing portion at a predetermined interval. forming a plurality of second seal portions extending in the width direction of the packaging material to continuously obtain a plurality of sealed bags;
A step of filling contents between the packaging materials during the step of obtaining the bag;
forming an unsealing initiation means comprising a notch or notch in each of the second seals;
and a step of singulating the bag body,
In the original fabric roll, the opening guide line of the packaging material is formed only in a half region in the width direction of the packaging material, and at least a part of the opening guide line is between the opening start means. each having a maximum portion and a minimum portion between the inner edges of the second seal portion; the total number of the maximum points and the minimum points between the inner edges of the second seal portion being 3 or more; A tangent to the opening guide line at the intersection of the virtual line connecting the guide line and the inner edge of the opening start means is formed to have an angle of 1° or more and 45° or less with respect to the virtual line. Production method. 2. The packaging material of claim 1, wherein the tear propagation resistance in a first direction parallel to the length direction of the packaging material is less than the tear propagation resistance in a second direction perpendicular to the first direction of the packaging material. of the pouch. A first packaging material including at least a base material layer and a sealant layer, and having a wavy opening guide line extending continuously in the length direction that penetrates the base material layer and does not penetrate the sealant layer. A step of preparing one raw roll;
A step of preparing a second raw roll wound with a second packaging material including at least a base material layer and a sealant layer and having no opening guide line;
The first packaging material is unwound from the first raw roll, and the second packaging material is unwound from the second raw roll, and the first packaging material and the sealant layers face each other . With the second packaging material superimposed, the first packaging material and the second packaging material are heat-sealed to form a first sealing portion extending in the length direction and a plurality of sealing portions extending in the width direction of the packaging material. A step of continuously obtaining a plurality of sealed bags by forming the second sealing portion of
Filling a content between the first packaging material and the second packaging material during the process of obtaining the bag;
forming an unsealing initiation means comprising a notch or notch in each of the second seals;
and a step of singulating the bag body,
At least a part of the opening guide line exists between the opening starting means, has a maximum portion and a minimum portion between the inner edges of the second seal portion, and has a maximum portion and a minimum portion between the inner edges of the second seal portion. The total number of the maximum points and the minimum points is 3 or more, and the tangent line of the opening guide line at the intersection of the virtual line connecting the inner edge of the opening guide line and the opening start means is 1° with respect to the virtual line. A method for manufacturing a pouch, which is formed to have an angle of 45° or more. In the second packaging material, the tear propagation resistance in a first direction parallel to the length direction of the second packaging material is less than the tear propagation resistance in a second direction perpendicular to the first direction of the second packaging material. A method for manufacturing a pouch according to claim 3. A pouch having a front side and a back side and formed using a packaging material including at least a base layer and a sealant layer,
a first end;
a second end opposite the first end;
a third end and a fourth end respectively extending between the first end and the second end;
end seal portions respectively formed at the third end and the fourth end;
An unsealing initiation means formed in each of the end seal portions and comprising a notch or notch;
A continuous wavy opening that is formed only on the front surface or only on the back surface, at least partially exists between the opening initiation means, penetrates the base material layer, and does not penetrate the sealant layer. a guide wire;
The unsealing guide line reaches from the inner edge of at least one of the end seal portions to the inner edge of the other end seal portion,
the opening guide wire has a maximum and a minimum between the inner edges of the end seals , respectively;
Between the inner edges of the end seal portions, the total number of the maximum points and the minimum points of the opening guide line is 3 or more,
The pouch, wherein a tangent line to the opening guide line at an intersection of the imaginary line connecting the opening guide line and the inner edge of the opening initiation means forms an angle of 1° or more and 45° or less with respect to the imaginary line. 6. The pouch according to claim 5, further comprising resealable means, wherein said opening initiation means and said opening guide line are located closer to said first end than said resealable means. Further comprising an end seal formed on the first end, between an inner edge of the end seal formed on the first end and an edge of the resealable means on the first end side. 7. The pouch according to claim 6, which satisfies D>h, where D is the distance between the opening guide lines and h is the height of the opening guide line. On the surface where the opening guide line is not formed among the front surface and the back surface, the tear propagation resistance in the first direction parallel to the imaginary line is greater than the tear propagation resistance in the second direction orthogonal to the first direction. 8. Pouch according to any one of claims 5 to 7, which is less than the resistance. 9. A pouch according to any one of claims 5 to 8, containing a content.

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