Method for extracting content from packaging bag

Abstract

To provide an extraction method for easily extracting a content which is sticky to a packaging bag.SOLUTION: A packaging bag 1 includes a cylindrical body 3 which is configured so that a vertical seal part 7 is formed in films, an upper side lateral seal part 4, and a lower side lateral seal part 5, wherein the vertical seal part is formed by welding the films in a butt part 8 formed by curving the films into cylindrical shapes and stacking an inner surface on one edge side of the film and an inner surface on the other edge side thereof, the upper side lateral seal part is provided so as to block an upper side of the cylindrical body, the lower side lateral seal part is provided so as to block a lower side of the cylindrical body, the packaging bag is composed of the butt part and a body part 9 other than the butt part, and an opening formation step forms an opening by tearing off the body part so that tearing starting from a tear start position 6a of the butt part reaches the upper side lateral seal part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for removing contents from a packaging bag. [Background technology]

[0002] Patent Document 1 discloses a packaging bag in which tearing starts at a tear initiation part provided on the seam part, and after the tearing reaches the main body part, the tearing spreads diagonally on both sides of the seam part and continues to tear in the longitudinal direction of the vertical seal part. In such a packaging bag, a wide opening can be formed by tearing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-156808 Summary of the Invention [Problem to be solved by the invention]

[0004] The packaging bag of Patent Document 1 has the advantage that a wide opening can be easily formed along the vertical seal, allowing the contents to fall by gravity through this opening and be easily removed from the packaging bag.

[0005] The contents that can be taken out in this way include flower paste, but some flower pastes have low viscosity and may stick to the packaging bag and be difficult to remove from the packaging bag. Even if you try to take out such flower paste by letting it fall by gravity through the opening, the flower paste may not fall easily, or even if it does fall, some of the flower paste may remain stuck to the packaging bag, and you may end up having to scrape it off with a spatula or the like. This problem can occur with any contents that tend to stick to packaging bags, not just flower paste.

[0006] The present invention has been made in consideration of the above circumstances, and provides a method for easily removing contents that tend to stick to packaging bags. [Means for solving the problem]

[0007] According to the present invention, the following inventions are provided. [1] A method for removing contents from a packaging bag, comprising: an opening forming step; and a squeezing step, the contents being contained in the packaging bag; the packaging bag comprising a cylindrical body formed by forming a vertical seal portion in a film; an upper horizontal seal portion; and a lower horizontal seal portion, the vertical seal portion being formed by bending the film into a cylindrical shape and overlapping the inner surface of one edge side and the inner surface of the other edge side of the film to weld the films together at a seam portion formed by overlapping the inner surface of one edge side and the inner surface of the other edge side of the film; the upper horizontal seal portion is provided to close the upper side of the cylindrical body; the lower horizontal seal portion is provided to close the lower side of the cylindrical body; the packaging bag is composed of the seam portion and a main body portion other than the seam portion; in the opening forming step, an opening is formed by tearing the main body portion so that tearing starting from a tear start position at the seam portion reaches the upper horizontal seal portion; and in the squeezing step, a lower portion of the packaging bag closer to the lower horizontal seal portion than the tear start position is compressed to squeeze the contents through the opening. [2] The method according to [1], wherein, when the vertical length of the packaging bag is L and the vertical length from the inner edge of the upper horizontal seal portion to the tear start position is L1, L1 / L is 0 to 0.2. [3] The method according to [1] or [2], wherein the packaging bag has a tear initiation portion at the seam portion, and the tear initiation position is a position where the tear initiation portion is provided. [4] The method according to any one of [1] to [3], wherein the content has a viscosity of 1 to 1000 Pa s. Effect of the Invention

[0008] According to the method of the present invention, the contents can be removed from the packaging bag by forming an opening in the packaging bag and squeezing the contents out by compressing the packaging bag. Since the contents are not removed by gravity, even if the contents tend to stick to the packaging bag, they can be removed relatively easily. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a plan view of the packaging bag 1 with no contents inside. [Diagram 2] FIG. 1 is a perspective view of a packaging bag 1 with contents inside. [Diagram 3] Figure 3A is a cross-sectional view perpendicular to the longitudinal direction D1 at the center of the longitudinal direction D1 of the vertical seal portion 7 when the contents are filled in the packaging bag 1, and Figure 3B is an enlarged view of area B in Figure 3A. [Figure 4] FIG. 4A is a perspective view showing the line along which the joint portion 8 and the main body portion 9 are torn when tearing of the joint portion 8 begins from the tear initiation portion 6, and FIG. 4B is an enlarged view of area B in FIG. 4A. [Diagram 5] 13 is a perspective view showing the state after the tearing of the main body portion 9 reaches the upper horizontal seal portion 4 and an opening 1b is formed. FIG. [Figure 6] 1 is a perspective view showing a state in which the contents W are squeezed out from an opening 1b. FIG. [Figure 7] FIG. 1 is a configuration diagram of a bag making and filling machine 100. [Figure 8] 1 is an enlarged view of the vicinity of a transverse sealing machine 116 of a bag making and filling machine 100, showing a state in which a transverse seal portion 11 is being formed by the transverse sealing machine 116. FIG. [Figure 9] From the state in Figure 8, the horizontal sealing machine 116 opens, the shutter member 123 returns to its initial position, the horizontal sealing section 11 moves to the position of the press / cutter 118, the press / cutter 118 clamps the horizontal sealing section 11 and cuts it, and then the press / cutter 118 and the squeezing roll 115 open. [Figure 10]9, the squeeze roll 115 is closed after the contents W are further added, and then the contact portion 3a moves to the position of the shutter member 123. FIG. [Figure 11] 10, the shutter member 123 sandwiches the contact portion 3a and moves vertically downward in this state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present invention will be described. Various features shown in the following embodiments can be combined with each other. Also, each feature can be an invention independently.

[0011] 1. Packaging bag 1 As shown in Figs. 1 to 4, a packaging bag 1 according to one embodiment of the present invention includes a cylinder 3 formed by forming a vertical seal portion 7 on a film 2, an upper horizontal seal portion 4, a lower horizontal seal portion 5, and a tear initiation portion 6. The packaging bag 1 is usually filled with contents, but Fig. 1 shows the packaging bag 1 in a state where no contents are filled for the sake of convenience. Examples of contents include viscous foods such as flower paste, jam, and bean paste. The viscosity of the contents is preferably 1 to 1000 Pa·s. In this case, the contents tend to stick to the packaging bag 1 and are difficult to remove from the packaging bag 1 due to the action of gravity, so the significance of applying the present invention is remarkable. In this specification, the viscosity means a value measured at 23°C in accordance with JIS Z8803. This viscosity is preferably 10 to 500 Pa·s, more preferably 20 to 100 Pa·s. Specific examples of this viscosity include 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000 Pa·s, and may be in a range between any two of the values ​​exemplified here.

[0012] In the following description, the top, bottom, left and right of Fig. 1 refer to the top, bottom, left and right of the packaging bag 1. Specifically, the axial direction of the cylinder 3 corresponds to the top and bottom direction. The left and right sides of the packaging bag 1 correspond to the left and right sides when the vertical seal portion 7 is disposed at the front side. The surface on the vertical seal portion 7 side is referred to as the front side, and the opposing surface is referred to as the back side. The top and bottom direction corresponds to the longitudinal direction D1 of the vertical seal portion 7, and the left and right direction corresponds to the orthogonal direction D2 perpendicular to the longitudinal direction D1.

[0013] The length of the packaging bag 1 in the left-right direction is, for example, 140 to 300 mm, and preferably 160 to 260 mm. Specifically, this length may be, for example, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, or 300 mm, and may be within a range between any two of the numerical values ​​exemplified here. If this value is too small, the contents may adhere to the inner surface of the packaging bag 1 during bag making and filling, making it difficult to fill. This problem is prominent when the contents have high viscosity. The value of [vertical length of packaging bag 1 / left-right length of packaging bag 1] is, for example, 1.5 to 15, and preferably 3 to 10. Specifically, this value may be, for example, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15, and may be within a range between any two of the values ​​exemplified here.

[0014] As shown in Fig. 3, the vertical seal 7 is formed by bending the film 2 into a cylindrical shape and welding the film 2 together at a seam 8 formed by overlapping the inner surface of one edge 2a of the film 2 with the inner surface of the other edge 2b. The vertical seal 7 may be formed over the entire seam 8, or an unsealed portion 8a may be provided in part of the seam 8. It is preferable that the unsealed portion 8a is provided so as to include the edge 8b of the seam 8. The portion of the packaging bag 1 other than the seam 8 is the main body 9. The main body 9 is bag-shaped.

[0015] It is preferable that the palm portion 8 is in a laid-down state. The surface of the palm portion 8 facing the main body portion 9 may or may not be welded to the outer surface of the main body portion 9.

[0016] The length in the left-right direction of each of the joint portion 8 and the vertical seal portion 7 is, for example, 5 to 50 mm, and preferably 10 to 30 mm. Specifically, this length is, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, or 50 mm, and may be within a range between any two of the numerical values ​​exemplified here. The value of {left-right length of the vertical seal portion 7 / left-right length of the joint portion 8} is, for example, 0.2 to 1.0, and preferably 0.5 to 1.0. Specifically, this value is, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0, and may be within a range between any two of the numerical values ​​exemplified here.

[0017] The upper horizontal seal portion 4 and the lower horizontal seal portion 5 are provided so as to close the upper and lower sides, respectively, of the cylindrical body 3. The horizontal seal portions 4, 5 are preferably formed along the upper and lower ends, respectively, of the cylindrical body 3. The horizontal seal portions 4, 5 are preferably formed so as to be perpendicular to the vertical seal portion 7. The horizontal seal portions 4, 5 can each be formed by heat-sealing the cylindrical body 3.

[0018] In one example, the horizontal seal portions 4, 5 are composed of a plurality of linear seal portions 4a, 5a (areas indicated by dotted lines in FIG. 1) aligned in the vertical direction. Each linear seal portion 4a, 5a is provided so as to extend in the left-right direction of the horizontal seal portions 4, 5. The linear seal portions 4a, 5a are preferably arranged in parallel. The linear seal portions 4a, 5a are preferably provided at a pitch of 2 to 5 mm. Specifically, this pitch is, for example, 2, 2.5, 3, 3.5, 4, 4.5, or 5 mm, and may be within a range between any two of the numerical values ​​exemplified here.

[0019] The joint portion 8 is preferably provided with a tear initiation portion 6. The tear initiation portion 6 is a portion configured to facilitate tearing of the joint portion 8, and is configured by, for example, a notch or a cut. By providing the tear initiation portion 6, it becomes easy to start tearing the joint portion 8 without using a tool such as scissors. The tear initiation portion 6 is preferably provided so as to reach the vertical seal portion 7 from the edge 8b of the joint portion 8. {The left-right length of the tear initiation portion 6 / the left-right length of the joint portion 8} is, for example, 0.1 to 0.9, and preferably 0.3 to 0.7. This value is specifically, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9, and may be within a range between any two of the numerical values ​​exemplified here.

[0020] If the vertical length of the packaging bag 1 is L and the vertical length from the inner edge 4b ​​of the upper horizontal seal portion 4 to the tear initiation portion 6 is L1, then L1 / L is preferably 0 to 0.2. Furthermore, L1 is, for example, 0 to 50 mm, and preferably 1 to 30 mm. If these values ​​are too large, when forming the opening 1b in the opening formation step described below, too much content will be placed on the upper horizontal seal portion 4 side relative to the tear initiation portion 6, and the content will easily fall out of the packaging bag 1 unintentionally and be wasted. Specifically, L1 / L is, for example, 0, 0.001, 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, or may be in a range between any two of the numerical values ​​exemplified here. Specifically, L1 is, for example, 0, 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 mm, or may be in a range between any two of the numerical values ​​exemplified here.

[0021] In areas of the packaging bag 1 near the horizontal seal portions 4, 5, the packaging bag 1 is less likely to expand, causing the packaging bag 1 to assume a flat shape, which hinders rolling transport of the packaging bag 1. This tendency is particularly noticeable when the inner edges of the horizontal seal portions 4, 5 are not provided with curved portions that convex outward at both ends, or when curved portions are provided but their length in the left-right direction is short.

[0022] In this embodiment, the left curved portions 4l, 5l and the right curved portions 4r, 5r are provided at both ends of the inner edge of the horizontal seal portions 4, 5, which are convex toward the outside. In addition, if the horizontal seal portions 4, 5 have a left-right length Ws and the left-right lengths of the left curved portions 4l, 5l and the right curved portions 4r, 5r Wl, Wr, Wr / Ws and Wl / Ws are set to 0.1 to 0.4, respectively. By forming such curved portions, as shown in FIG. 2, the packaging bag 1 is easily expanded even in the vicinity of the horizontal seal portions 4, 5, and the outer shape becomes approximately cylindrical, so that the rolling and conveying of the packaging bag 1 becomes smooth. It is preferable that Wr and Wl are the same, but they may be different from each other. Specifically, Wr / Ws and Wl / Ws are, for example, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, and 0.4, and may be within a range between any two of the numerical values ​​exemplified here. Ws is the same as the length of the packaging bag 1 in the left-right direction. Wl and Wr are, for example, 10 to 100 mm, and preferably 20 to 50 mm. Specifically, Wl and Wr are, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 mm, and may be within a range between any two of the numerical values ​​exemplified here.

[0023] In addition, the left curved portion 4l, 5l and the right curved portion 4r, 5r are preferably arc-shaped, and when the radii of curvature are Rl, Rr, Rl / Ws and Rr / Ws are preferably 0.1 to 0.4. Specifically, Rl / Ws and Rr / Ws are, for example, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, and may be within a range between any two of the numerical values ​​exemplified here. Rl, Rr are, for example, 20 to 60 mm, and preferably 30 to 50 mm. Specifically, Rl, Rr are, for example, 20, 25, 30, 35, 40, 45, 50, 55, 60 mm, and may be within a range between any two of the numerical values ​​exemplified here.

[0024] The packaging bag 1 filled with the contents is in a substantially elliptical cylindrical shape. As shown in Fig. 3, the circularity of the cross section perpendicular to the longitudinal direction D1 at the center of the longitudinal direction D1 of the vertical seal portion 7 when the contents are filled in the packaging bag 1 is preferably 0.5 or more. The larger the circularity value, the closer the cross-sectional shape is to a circle. In this specification, the circularity is defined as D1 / D2, where D1 and D2 are the inscribed circle diameter and the circumscribed circle diameter in the cross section, respectively. D1 / D2 is, for example, 0.5 to 1.0, specifically, for example, 0.5, 0.6, 0.7, 0.8, 0.9, and 1.0, and may be within a range between any two of the numerical values ​​exemplified here.

[0025] It is preferable that the tear initiation portion 6 is provided between the left curved portion 4l and the right curved portion 4r, in which case it is easier to form a large opening 1b in the opening forming step described below.

[0026] The film 2 is preferably a laminated film having a base layer and a sealant layer, and more preferably has an adhesive layer between the base layer and the sealant layer.

[0027] The base material layer is disposed so as to be exposed on the outer surface of the packaging bag 1, and the sealant layer is disposed so as to be exposed on the inner surface of the packaging bag 1. The sealant layers are heat-sealed to each other to form the vertical seal portion 7 and the horizontal seal portions 4 and 5.

[0028] The base layer is made of a material having excellent strength and high impact resistance. For example, polyamide, polyolefin, polyethylene, etc. are used as the base layer. The adhesive layer is a layer for adhering the base layer and the sealant layer so as to be laminated together, and for example, polyethylene, etc. are used as the adhesive layer.

[0029] The polyamide of the base layer preferably contains an aromatic polyamide. In this case, the base layer has linear cutting properties in the MD direction and has excellent barrier properties. There are no particular limitations on the aromatic polyamide, but resins containing 70 mol % or more of polyamide structural units consisting of xylylenediamine and α,ω-aliphatic dicarboxylic acid having 6 to 12 carbon atoms in the molecular chain can be used. Specific examples include homopolymers such as polymetaxylylene adipamide, polymetaxylylene pimelamide, polymetaxylylene azelamide, polyparaxylylene azelamide, and polyparaxylylene decanamide, and copolymers such as metaxylylene / paraxylylene adipamide copolymer, metaxylylene / paraxylylene pimelamide copolymer, metaxylylene / paraxylylene azelamide copolymer, and metaxylylene / paraxylylene sepacamide copolymer, with polymetaxylylene adipamide (hereinafter referred to as "MXD6") being preferred as it has excellent basic properties such as strength and gas barrier properties, and is relatively easily available industrially.

[0030] The sealant layer can be formed of a resin having excellent heat sealability. For example, the sealant layer can be formed of linear low-density polyethylene. The film constituting the sealant layer is preferably one having linear cutability in the MD direction.

[0031] In addition, it is preferable that at least one of the base layer and the sealant layer has a straight-line cutting property. The thickness of the sealant layer is preferably at least twice the thickness of the base layer, and is preferably at least half the thickness of the entire film 2.

[0032] The film 2 can be formed by laminating a base layer having a thickness of 10 μm to 20 μm, for example 15 μm, an adhesive layer having a thickness of 10 μm to 30 μm, for example 20 μm, and a sealant layer having a thickness of 30 μm to 50 μm, for example 40 μm, and the film 2 usually has a thickness of 50 μm to 100 μm.

[0033] The base layer and the sealant layer are bonded together by an adhesive layer so as to be laminated together. For example, polyethylene can be used as the adhesive layer, and the base layer and the sealant layer can be bonded together by an extrusion lamination method. A material other than polyethylene can be used as the adhesive layer, and the base layer and the sealant layer can be bonded together by a dry lamination method. Alternatively, fusion without an adhesive layer can be used. The film 2 formed from the base layer, the adhesive layer, and the sealant layer in this way has high strength, impact resistance, sealing properties, airtightness, etc.

[0034] In the film 2, the first tear strength S1 is the tear strength in the longitudinal direction D1, and the second tear strength S2 is the tear strength in the orthogonal direction D2. S2 / S1 is preferably 1.5 to 10, and more preferably 2 to 6. The tear strength can be measured according to JIS K7128. The tear strength is an index showing the magnitude of the force required to tear the film 2, and the larger the tear strength value, the more difficult it is to tear the film 2. S2 / S1 is an index showing how difficult it is to tear the orthogonal direction D2 compared to the longitudinal direction D1, and the larger this value, the more easily the film 2 is to tear in the longitudinal direction D1. The value of S2 / S1 affects how the film 2 is torn when tearing of the film 2 is started from the tear start position 6a, and when S2 / S1 is within the above numerical range, a wide opening 1b is likely to be formed. Specifically, S2 / S1 may be, for example, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, or 10.0, and may be within a range between any two of the numerical values ​​exemplified here.

[0035] 2. Method of removing contents from packaging bag 1 The method for removing the contents from the packaging bag 1 according to one embodiment of the present invention includes an opening forming step and a squeezing step. Each step will be described in detail below.

[0036] <Opening formation process> In the opening forming step, as shown in Figures 4 and 5, the opening 1b is formed by tearing the main body portion 9 so that the tearing starts from tear initiation position 6a at the joint portion 8 and reaches the upper horizontal seal portion 4.

[0037] The tear initiation position 6a is the position where tearing starts, and when the tear initiation part 6 is provided in the joint part 8, it is preferable that the position where the tear initiation part 6 is provided is set as the tear initiation position 6a. When the tear initiation part 6 is not provided in the joint part 8, for example, a cut may be made in the joint part 8 using a tool such as scissors, and the cut may be set as the tear initiation position 6a.

[0038] In one example, as shown in Fig. 4, when the seam 8 is raised near the tear start position 6a, and the seam 8 is pinched at its two portions 8c and 8d on both sides of the tear start position 6a with both hands, and the portion 8c on the upper horizontal seal 4 side is pulled strongly toward the upper horizontal seal 4, the seam 8 is first torn as shown by the dashed line 12 in Figs. 1 and 4B. Then, when the tear reaches the main body 9, the tear spreads diagonally to both sides of the seam 8 as shown by the dashed lines 13 and 14, and continues to tear until it reaches the upper horizontal seal 4. As a result, a wide opening 1b is formed in the intermediate region 15 between the dashed lines 13 and 14, and the contents in the packaging bag 1 can be easily squeezed out through this opening 1b. It is preferable that the dashed lines 13 and 14 are symmetrical with respect to the boundary line 8e between the seam 8 and the main body 9. Even after the opening 1b is formed, the intermediate region 15 remains connected to the upper horizontal seal portion 4 and is not separated from the remaining portion of the packaging bag 1, which prevents the intermediate region 15 from being mixed as a foreign body into the contents W. Furthermore, if tearing is started from the upper horizontal seal portion 4, film fragments are likely to be generated and tearing is difficult due to the curved portions 4l, 4r, but the method of the present embodiment suppresses the generation of film fragments and does not make tearing difficult due to the curved portions 4l, 4r.

[0039] If the width at the portion where the width of the middle region 15 is maximum is Wc, Wc / Ws is, for example, 0.3 to 1.0, preferably 0.4 to 0.8, and specifically, for example, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, and may be within a range between any two of the numerical values ​​exemplified here. If this value is too small, it is difficult to take out the contents.

[0040] The tearing of the main body portion 9 may be stopped when it reaches the upper horizontal seal portion 4, or after reaching the upper horizontal seal portion 4, the tearing may be allowed to continue along the inner edge 4b ​​of the upper horizontal seal portion 4 to widen the opening 1b.

[0041] The opening formation step may be completed before the squeezing step or during the squeezing step. In the latter case, for example, although the opening 1b is formed before the squeezing step, the tear of the main body portion 9 has not reached the upper horizontal seal portion 4, and when squeezing the contents through the opening 1b in the squeezing step, the tear of the main body portion 9 may progress to reach the upper horizontal seal portion 4.

[0042] <Squeezing step> In the squeezing step, as shown in FIG. 6, the lower portion 1c of the packaging bag 1, which is closer to the lower horizontal seal portion 5 than the tear start position 6a, is compressed to squeeze out the contents W through the opening 1b. This step can be performed, for example, by moving the hand holding the lower portion 1c from the lower horizontal seal portion 5 toward the opening 1b. Also, by repeating this step multiple times, the amount of contents remaining in the packaging bag 1 can be reduced.

[0043] 3. Bag-making and filling method Next, a bag-making and filling method using the film 2 will be described with reference to FIGS. 7 to 11. This method can be implemented using a vertical bag-making and filling machine 100.

[0044] <S1: Film bending step> First, the film 2 fed out from the roll-shaped web F is guided to the former 112 via a plurality of feeding rolls 120, 121. A sensor 119 is arranged in the path from the roll-shaped web F to the former 112 to detect the registration marks printed at regular intervals in the length direction of the film 2, so that a film 2 of a certain length can be fed out on the track of the bag-making and filling machine 100 at regular time intervals. The film 2 is curved into a cylindrical shape while passing through the former 112, and the inner surface of one edge 2a side of the film 2 and the inner surface of the other edge 2b side are overlapped to form the clasping portion 8.

[0045] Note that, a printing process for printing on the film 2 may be provided at a position in front of the former 112. This printing is preferably performed in a region that becomes the front surface (the surface on the side of the longitudinal seal portion 7) of the packaging bag 1. In this case, when the packaging bag 1 that has fallen onto the conveyor 130 in the cutting process described later is conveyed with the longitudinal seal portion 7 on the upper side, it is possible to confirm whether the printing has been properly performed.

[0046] <S2: Longitudinal Seal Process> Next, the longitudinal seal portion 7 is formed by heat sealing with the longitudinal sealer 113. The longitudinal sealer 113 includes a pair of seal rolls, and while sandwiching the butting portion 8 of the film 2 with the pair of seal rolls, the pair of seal rolls are rotated in opposite directions to each other in accordance with the timing at which the film 2 moves at regular time intervals, and heat sealing is performed while feeding out the film 2. As a result, the longitudinal seal portion 7 is formed. By forming the longitudinal seal portion 7 on the film 2, the cylindrical body 3 is formed. The tear start portion 6 can be formed in the butting portion 8 using a cutter 131 disposed downstream of the longitudinal sealer 113. The tear start portion 6 may be formed after the completion of bag making and filling.

[0047] <S3: Transverse Seal Process> Next, by rotating the feed roll 114, the cylindrical body 3 is moved downstream by a predetermined length, and as shown in FIG. 8, a predetermined position of the cylindrical body 3 is heat sealed by the transverse sealer 116 to form the transverse seal portion 11. The transverse seal portion 11 is configured by connecting the upper transverse seal portion 4 of the packaging bag 1 on the downstream side and the lower transverse seal portion 5 of the cylindrical body 3 on the upstream side, and is divided vertically in the cutting process described later. The transverse sealer 116 includes a pair of seal bars 116a, and heat sealing is performed by sandwiching the predetermined position with the pair of seal bars 116a for a predetermined time.

[0048] In one example, the seal bar 116a has a shape in which convex stripes and concave stripes extending in the left - right direction in FIG. 1 are arranged alternately in the vertical direction. In this case, linear seal portions (portions indicated by dotted lines in FIG. 1) 4a, 5a are formed at the portions where the convex stripes are pressed.

[0049] <S4: Cutting Process> Next, by further rotating the feed roll 114, the horizontal seal portion 11 is moved to the position of the press-cutter 118. The press-cutter 118 includes a pair of bars 118a.

[0050] Next, as shown in FIG. 9, the press-cutter 118 is closed to clamp and cool the horizontal seal portion 11, and the horizontal seal portion 11 is cut by a cutter blade (not shown) and divided vertically, thereby forming the upper horizontal seal portion of the downstream packaging bag 1 and the lower horizontal seal portion 5 of the upstream cylindrical body 3. When the horizontal seal portion 11 of the downstream packaging bag 1 is cut, it falls onto the conveyor 130.

[0051] <S5: Filling Process> Next, as shown in FIG. 9, when the squeezing roll 115, which was in a closed state in the previous process, is opened, the content W that was introduced from the hopper 111 in the previous process and accumulated on the upper side of the squeezing roll 115 falls to the lower side of the squeezing roll 115. Since the lower horizontal seal portion 5 is formed on the cylindrical body 3, the fallen content W is filled into the cylindrical body 3. A pair of shutter members 123 are arranged around the cylindrical body 3. The shutter members 123 are configured to be movable in the horizontal and vertical directions.

[0052] When the content W is further introduced into the cylindrical body 3 and the content W in the cylindrical body 3 reaches the position of the sensor 122, as shown in FIG. 10, the squeezing roll 115 is closed to divide the content W into an upper portion and a lower portion of the squeezing roll 115. The content in the lower portion of the squeezing roll 115 is the content for one bag of the packaging bag 1. Also, by closing the squeezing roll 115, an adhering portion 3a is formed on the cylindrical body 3, and a bag portion 3b is formed, which is the portion where the content is accommodated between the adhering portion 3a and the lower horizontal seal portion 5.

[0053] <S6: Feeding Process> Next, while keeping the squeezing roll 115 closed, the feed roll 114 is rotated to move the adhering portion 3a to the position of the shutter member 123 as shown in FIG. 10.

[0054] <S7: Pinching Process> Next, as shown in FIG. 11, the shutter member 123 is moved horizontally to pinch the adhesion part 3a above the bag part 3b, and further, the shutter member 123 is moved vertically downward (refer to the arrow in FIG. 11), so that the bag part 3b can be given tension. Here, it is preferable to move the shutter member 123 below the horizontal sealing machine 116. By doing so, it becomes possible to perform horizontal sealing while maintaining the tension applied to the bag part 3b.

[0055] Thereafter, by performing the horizontal sealing step (S3) while maintaining the shutter member 123 above the bag part 3b, a horizontal seal part 11 can be formed while giving tension to the bag part 3b at a position (adhesion part 3a) higher than the part (bag part 3b) filled with the content W, and the packaging bag 1 is formed.

[0056] Then, as shown in FIG. 9, the shutter member 123 is returned to its original position, and the subsequent cutting step (S4) is performed. As a result, as shown in FIG. 9, the packaging bag 1 falls onto the conveyor 130.

[0057] In this way, by repeating the steps of S3 to S7, the packaging bag 1 filled with the content W can be continuously manufactured. In addition, in the manufacture of the packaging bag 1 in this embodiment, the heat treatment step is not performed.

[0058] As described above, in the bag-making and filling method in this embodiment, the necessary tension is given to the packaging bag 1 by performing the pinching process described above on the cylindrical body 3.

Example

[0059] 1. Manufacture of the Packaging Bag 1 Using the film 2 having the following configuration, according to the bag-making and filling method of the above embodiment, the packaging bag 1 having the configuration shown in FIGS. 1 to 4 and the dimensions shown below was manufactured. The packaging bag 1 was filled with a flower paste (viscosity measured at 23°C: 50 Pa·s). The S2 / S1 of the film 2 was about 3.3.

[0060] Film 2 (3-layer laminate film consisting of a base layer, an adhesive layer, and a sealant layer) Base layer: Polyamide (Unitika Co., Ltd., Emblem NC-15, thickness 15 μm) Adhesive layer: Maleic anhydride modified polyethylene, thickness 5 μm Sealant layer: LLDPE (Skyfilm Co., HR543, thickness 50 μm)

[0061] ·Packaging bag 1 The length of the packaging bag 1 in the left-right direction: 200 mm Vertical length of packaging bag 1: 600 mm Length of the joint 8 in the left-right direction: 20 mm Length of the vertical seal 7 in the left-right direction: 10 mm Length of opening start part (notch) in left and right direction: 15mm The vertical length from the inner edge 4b ​​of the upper horizontal seal 4 to the tear start point 6: 5 mm

[0062] 2. Content removal test The contents were removed from the packaging bag 1 filled with the contents W manufactured by the above-mentioned method by the methods shown in Example 1 and Comparative Example 1 below, and the amount of the contents W remaining in the packaging bag 1 was measured. As a result, it was found that the remaining amount of the contents W in the packaging bag 1 was reduced in Example 1 compared to Comparative Example 1. In Comparative Example 1, the remaining amount of the contents W can also be reduced by scraping off the contents W with a spatula or the like, but this requires time and effort. On the other hand, according to the method of the embodiment of the present invention, the remaining amount of the contents W can be reduced without requiring time and effort.

[0063] <Example 1> As shown in Figures 4 and 5, an opening 1b was formed between the tear initiation portion 6 and the upper horizontal seal portion 4 by pinching both sides of the tear initiation portion 6 with both hands and strongly pulling the portion 8c on the upper horizontal seal portion 4 side toward the upper horizontal seal portion 4 to tear the main body portion 9.

[0064] Next, as shown in Fig. 6, the hand gripping the lower portion 1c was moved from the vicinity of the lower horizontal seal portion 5 toward the opening 1b to squeeze out the contents W from the opening 1b, and this process was repeated five times. After that, the remaining amount of the contents W in the packaging bag 1 was measured and found to be 1% by mass or less of the original amount of the contents W.

[0065] <Comparative Example 1> An opening 1b was formed between the tear initiation portion 6 and the lower horizontal seal portion 5 by pinching both sides of the tear initiation portion 6 with both hands and pulling strongly the portion on the lower horizontal seal portion 5 side to tear the main body portion 9.

[0066] Next, with the opening 1b facing downward, the packaging bag 1 was gently vibrated to attempt to cause the contents W to fall through the opening 1b.

[0067] As a result, most of the contents W fell, but a portion of the contents W remained attached to the packaging bag 1, and the remaining amount was 10% by mass of the original amount of the contents. [Explanation of symbols]

[0068] 1: Packaging bag 1b: Opening 1c: Lower part 2: Film 2a: One fate 2b: Other Relationships 3: Cylindrical body 4: Upper horizontal seal 4a: Linear seal part 4b: Inner border 4l: Left curved part 4r: Right curved part 5: Lower horizontal seal 5a: Linear seal part 5l: Left curved part 5r: Right curved part 6:Tear start part 6a:Tear start position 7: Vertical seal part 8: Gassho part 8a: Unsealed part 8b: Edge 8c: Upper horizontal seal side 8d: Lower horizontal seal area 8e: Border 9: Main body 15: Middle area 100: Bag making and filling machine 111: Hopper 112:Forma 113: Vertical sealing machine 114: Feed roll 115: Roll 116: Horizontal sealing machine 116a: Seal bar 118: Press and cutter 118a: Bar 119: Sensor 120: Payout roll 121: Payout roll 122: Sensor 123: Shutter parts 130: Conveyor 131: Cutter F: Rolled raw material W: Contents

Claims

1. A method for removing contents from a packaging bag, comprising the steps of: The method includes an opening forming step and a squeezing step, The contents are contained in the packaging bag, The packaging bag includes a cylindrical body formed by forming a vertical seal portion in a film, an upper horizontal seal portion, and a lower horizontal seal portion, the vertical seal portion is formed by bending the film into a cylindrical shape and welding the films together at a joint portion formed by overlapping an inner surface of one edge side and an inner surface of the other edge side of the film, The upper horizontal seal portion is provided to close the upper side of the cylindrical body, The lower horizontal seal portion is provided to close the lower side of the cylindrical body, The packaging bag is composed of the joint portion and a main body portion other than the joint portion, In the opening forming step, an opening is formed by tearing the main body portion such that a tear that starts from a tear initiation position at the joint portion reaches the upper horizontal seal portion, In the squeezing step, a lower portion of the packaging bag that is closer to the lower horizontal seal portion than the tear start position is compressed to squeeze out the content through the opening.

2. 2. The method of claim 1 , The method comprises the steps of: (a) defining a vertical length of the packaging bag as L; and (b) defining a vertical length from the inner edge of the upper horizontal seal portion to the tear start position as L1; and wherein L1 / L is 0 to 0.

2.

3. 3. The method of claim 1 or claim 2, The packaging bag has a tear initiation portion at the seam portion, The tear initiation location is a location where the tear initiation portion is provided.

4. 3. The method of claim 1 or claim 2, The method according to claim 1, wherein the content has a viscosity of 1 to 1000 Pa·s.

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