Filling and packaging machines

Abstract

To provide a filling packaging machine performing high quality filling packaging without processing a surface of a packaging film, and allowing packaging other than an opening part in an optimum sealing condition, when manufacturing a packaging bag to be peeled and opened by pressing a storing part of a filling content.SOLUTION: A filling packaging machine 1 manufactures a packaging bag by drawing out and transporting a belt-like laminated packaging film wound in a roll state, applying heat sealing in a longitudinal direction and a lateral direction, and filling a fluid content. A laminated packaging film 110 has at least a substrate layer 111 allowing penetration of laser, an intermediate layer 112 causing delamination from an adjacent layer reacting with laser irradiation, and a sealant layer 113. The filling packaging machine 1 has a laser device 3 which irradiates a peelability imparting range 102 set in advance of the laminated packaging film with laser and reduces sealing strength by the delamination from the adjacent layer.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a technique for making (producing) a packaging bag that can be peeled open by applying pressure (compression) to a storage section of a filled item (item that has been filled; contents). [Background technology]

[0002] When using a filling and packaging machine to fill and produce packaging bags that can be peeled open from the inside of the package by applying pressure (compression) to the bag portion (the portion filled with the contents) of the packaging bag (package) with the opener's fingers or the like, thereby pushing the contents outward, the method described below has traditionally been used.

[0003] In the first method, the product is filled and packaged using a packaging film that has a peelable layer at the opening portion. The second method is to form a peel-open area (area with weak seal strength) by lowering the sealing conditions (sealing temperature and sealing pressure) for the peel-open area when the filling and packaging machine is packaging (see, for example, Reference 1). The third method is to apply a surface treatment to the inside of the packaging film to reduce the seal strength and form a peel-open area (a part with weak seal strength) (see Reference 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Publication No. 63-023343 [Patent Document 2] JP 2014-58338 A Summary of the Invention [Problem to be solved by the invention]

[0005] When using the first and second conventional methods described above, packaging had to be performed within a range of sealing conditions that allowed the opening portion to be peeled off, which meant that sealing conditions other than the opening portion had to be compromised, resulting in an overall reduction in sealing quality, such as seal strength and appearance.

[0006] Even when the third method is used, since the surface of the packaging film that comes into contact with the filling (contents) is processed, it is necessary to carefully consider the reaction to the filling, and it has been avoided due to hygiene issues, especially when filling food. Furthermore, when the processing involves scraping the surface of the packaging film, there is a high possibility that processing debris will be generated, and if this remains on the sealing surface, it may cause sealing defects or fall off and become mixed into the contents.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a filling and packaging machine that produces packaging bags that can be peeled open by applying pressure (pressure) to the storage area for the filled material, without processing the surface of the packaging film, and that can package areas other than the opening area under optimal sealing conditions, thereby producing high-quality filling and packaging. [Means for solving the problem]

[0008] For this reason, the present invention provides A filling and packaging machine that pulls out and conveys a strip-shaped laminated packaging film wound in a roll, performs heat sealing in the vertical and horizontal directions to form a bag, and fills a fluid content to manufacture a packaging bag, The laminated packaging film comprises a laser-transmittable base layer and A substrate layer is provided. In response to laser irradiation Expand The middle class, The intermediate layer is disposed on the opposite side of the base layer. and a sealant layer, The heat sealing is The sealant layers of the laminated packaging film are applied in a state where they face each other, The filling and packaging machine irradiates a laser to a predetermined peelable area including a planned area of ​​the laminated packaging film to be heat-sealed at any stage before the heat sealing is performed. By forming an expansion portion in the intermediate layer, the sealant layers can be easily bonded together by the heat seal.It is equipped with a laser device that reduces the seal strength and makes it easier to peel off. It is characterized by:

[0009] In the present invention, the laser device can be characterized in that it reduces the seal strength and adjusts the ease of peeling by slowing down the laser scanning speed for the peelable area, and increases the seal strength and adjusts the difficulty of peeling by increasing the laser scanning speed.

[0010] In the present invention, the laser device can be characterized in that it adjusts the ease of peeling by lowering the seal strength by increasing the laser irradiation density for the peelable area, and adjusts the difficulty of peeling by increasing the seal strength by decreasing the laser irradiation density.

[0011] In the present invention, the laser device may be characterized in that the peelable area is set at two or more locations within an area corresponding to one packaging bag.

[0012] In the present invention, the laser device may be characterized in that the two or more areas to be provided with peelability are set to different laser scanning speeds or laser irradiation densities.

[0013] In the present invention, the laser device may be characterized in that it prints a pattern, letter or symbol in a predetermined area of ​​one packaging bag.

[0014] In the present invention, the laser device may set a peelable range at a position connecting the storage section for the filled material formed by heat sealing of the packaging bag and an edge of the packaging bag.

[0015] In the present invention, the storage section for the filled material formed by heat sealing the packaging bag has a convex portion on at least one side, and the laser device sets a peelable range at a position connecting the convex portion and the end side of the packaging bag.

[0016] In the present invention, the packaging bag may be characterized in that the storage section for the filled material formed by heat sealing has at least two chambers, and the laser device sets the peelable range so as to connect the two storage sections.

[0017] In the present invention, the laser device may be characterized in that the laser wavelength is set in the range of 355 μm to 1064 μm.

[0018] In the present invention, the packaging bag can be characterized in that by compressing a storage section filled with a filling material, the filling material is poured out from a position that has been made peelable by the laser device. Effect of the Invention

[0019] According to the present invention, when manufacturing (producing) packaging bags that can be peeled open by applying pressure (pressure) to the storage area for the filled material, it is possible to provide a filling and packaging machine that performs high-quality filling and packaging by making it possible to package areas other than the opening area under optimal sealing conditions without processing the surface of the packaging film. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a front view of a vertical automatic filling and packaging machine (filling and packaging machine) according to one embodiment of the present invention. [Diagram 2] 1 is a perspective view showing a configuration example of a laser device according to an embodiment of the present invention. [Diagram 3] (3-a) is a diagram showing the laminated packaging film of bag making example 1 to which a peel-off coloring portion has been added, which has been transported by a packaging material feeding device; (3-b) is a diagram showing the laminated packaging film that has been folded back by a former guide and then vertically sealed to form a tube; (3-c) is a front view showing the laminated packaging film (packaging body) to which a horizontal seal has been applied to the portion including the peel-off coloring portion to form a continuous bag; and (3-d) is a front view showing individual packaging bags (packaging body) cut at the set position of the horizontal seal. [Figure 4]1 is a perspective view showing an example of a method for peeling and opening a packaging bag according to the present embodiment. FIG. [Diagram 5] (5-a) is a cross-sectional view of the laminated packaging film (front side) of bag making example 1 of the present invention, (5-b) is a cross-sectional view explaining the state in which the portion to be peeled off (portion to be weak) is irradiated with a laser to cause a color reaction (expansion) of the printed layer and peeling (delamination) from the adjacent layer, (5-c) is a cross-sectional view showing the state in which the laminated packaging film (front side) and the laminated packaging film (back side) equipped with a peeling coloring portion are folded back and overlapped to form a cylindrical shape, and (5-d) is a cross-sectional view showing the state in which a peel-opening portion (weak portion) is formed in the packaging bag by sealing the portion including the peeling coloring portion. [Figure 6] FIG. 6-a shows the laminated packaging film of bag making example 2, in which a peel-off coloring area has been added to the portion to be folded back that has been transported by the packaging material feed device; FIG. 6-b shows the laminated packaging film that has been folded back by a former guide and then vertically sealed to form a tube; FIG. 6-c shows the laminated packaging film (package) that has been horizontally sealed in the portion including the peel-off coloring area to form a continuous bag; and FIG. 6-d shows individual packaging bags (package) that have been cut at the set positions of the horizontal seals. [Figure 7] (7-a) is a cross-sectional view of the laminated packaging film of bag making example 2, (7-b) is a cross-sectional view explaining the state in which the portion to be peeled (portion to form a weak portion) is irradiated with a laser to cause a color reaction (expansion) of the printed layer, causing peeling (delamination) from the adjacent layer, (7-c) is a cross-sectional view showing the state in which the packaging film is folded back at the portion including the peelable color portion by a former guide to be formed into a tube, and (7-d) is a cross-sectional view showing the state in which a peelable opening portion (weak portion) is formed in the packaging bag by applying a horizontal seal to the portion including the peelable color portion. [Figure 8] (8-a) is a front view showing bag making example 3, (8-b) is a front view showing bag making example 4, (8-c) is a front view showing bag making example 5, and (8-d) is a front view showing bag making example 6. [Figure 9] FIG. 9-a is a front view showing bag making example 7, and FIG. 9-b is a front view showing bag making example 8. [Figure 10] FIG. 10-a is an enlarged front view of the peel-open portion of bag making example 9, and FIG. 10-b is an enlarged front view of the peel-open portion of bag making example 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment of the present invention will be described below with reference to the accompanying drawings. Note that the present invention is not limited to the embodiment (example) described below.

[0022] As shown in FIG. 1, a vertical automatic filling and packaging machine (filling and packaging machine) 1 includes a packaging material shaft 2 that supports a laminated packaging film F1 wound in a roll, a packaging material feeding device 4 that pulls out and feeds the packaging film from the packaging film F1, a former guide 5 that folds the packaging film along the longitudinal direction (the conveying direction of the packaging film) to form it into a substantially cylindrical shape, a vertical sealing device 7 that vertically seals both ends of the substantially cylindrically folded film and a first horizontal sealing device 8 that horizontally seals the bottom side of the folded film, and a bag portion (a portion for accommodating the filling material) of the upper opening of the packaging film that contains the contents (filling material). The device is made up of a filling nozzle 6 that fills the packaging film with the contents (filled material), a vertical sealing device 7 that vertically seals both ends of the packaging film that has been folded into an approximately cylindrical shape along the longitudinal direction, a first horizontal sealing device 8 that horizontally seals the bottom of the packaging bag, a second horizontal sealing device 9 that horizontally seals the top end of the packaging film (packaging bag) filled with the contents (filled material), a cutter device 10 that cuts off the continuous packaging bags at the center of the horizontal seal into a predetermined number of pieces, an output slide 11 that transports the cut-off packaging bags (packaged bodies) P1, and an operation panel 12 for inputting various data and performing various operations and controls.

[0023] Furthermore, vertical automatic filling and packaging machine 1 according to this embodiment is provided with laser device 3 upstream of first horizontal sealing device 8 in the transport direction of the packaging film. In Fig. 1, laser device 3 is provided between roll-shaped laminated packaging film F1 and packaging material feed device 4. The laser device 3 includes a laser protection cover 3a and an irradiation position adjustment mechanism 3b. The irradiation position adjustment mechanism 3b can adjust the laser irradiation position (the irradiation position of the laser 101) in the width direction and the vertical direction of the packaging film. The adjustment method may be either manual or electric.

[0024] An example of the configuration of the laser device 3 is shown in FIG. As shown in Fig. 2, the laser device 3 includes a laser marker 100, and is configured so that a laser 101 is irradiated from the laser marker 100 toward a packaging film F2. In Fig. 2, the reference symbol F2 denotes a strip-shaped laminated packaging film before laser irradiation (before forming by the former guide 5), and the reference symbol F3 denotes a laminated packaging film (before forming by the former guide 5) to which a peeling coloring portion (weak peeling portion, peelable range) 102 has been imparted after laser irradiation (before forming by the former guide 5).

[0025] The laser device 3 is usually used to print information such as the date of manufacture (as well as other information such as the product name and manufacturer information) as shown in FIG. 8 (8-c). Specifically, a packaging film as shown in FIG. 5 can be used. The laminated packaging film (surface side) 110 is composed of a laser-transparent base layer 111 made of PET (polyethylene terephthalate) or the like, a printing layer 112 made of biaxially oriented PET, biaxially oriented PP (OPP), biaxially oriented nylon (ONY) or the like, and a sealant layer 113 (a layer that welds and bonds films together) made of CPP (cast polypropylene film) or the like, and the film can be printed by irradiating the printing layer 112 with a laser.

[0026] The laser device 3 of this embodiment irradiates the packaging film with a laser 101 from the laser marker 100, causing the laser 101 that has passed through the base material layer 111 to act on the printing layer 111 and cause the ink to undergo a chemical change (reaction and color development), thereby printing. As the laser in this embodiment, an IR laser (fiber / YVO4) light or a UV laser can be used. Incidentally, a CO2 laser (wavelength of approximately 10,600 μm) prints by burning the surface of the packaging material with heat, which generates a large amount of smoke and gas from the burned off resin, and is therefore not preferred in this embodiment.

[0027] Here, the laser device 3 of this embodiment can also be used for purposes other than printing, and is configured so that at least a portion of the lateral seal of the packaging film is peeled off by pressure (applying pressure) from the opener's finger or the like onto the bag portion of the package (the storage portion filled with the contents), forming a weak peeling portion 107 through which the contents (fillings) can be pushed out.

[0028] In this embodiment, the peeling weak portion (also simply referred to as the weak portion) 107 is formed as follows. That is, by irradiating the packaging film with a laser 101 from a laser marker 100, the laser 101 that has passed through a base layer 111 acts on a printed layer 112 to form (impart) an expansion portion 102 (a color-developing portion for peeling, a region imparting peelability). For example, the laser 101 is moved back and forth to form an expanded portion 102 that is more expanded than other portions in the printed layer 112 in the portion that will become the horizontal seal.

[0029] Specifically, as shown in FIG. 5 (5-b), the laser 101 is irradiated in a concentrated manner (at a high density) in a certain area, causing a chemical reaction in the printing layer 112 in that area, forming an expanded portion 102 (a color-developing portion for peeling) that is more expanded than the other non-irradiated areas. Then, as shown in FIG. 5(5-c), "the packaging film 110a and the packaging film 120 overlapped via the former guide 5" are sandwiched and transversely sealed by a heated seal bar or the like in the first transverse sealing device 8 and the second transverse sealing device 9, as shown in FIG. 5(5-d). However, since a force acts on the expanded expanded portion 102 to separate it from the sealant layer 123 of the packaging film 120 on the back side (lower side), the sealant layer 113 on the front side and It is connected on the back side (underside) The adhesion between the sealant layer 123 and the adhesive layer 124 is weakened, and A sealant layer 113 on the front side and a sealant layer 123 in contact with the back side (lower side) of the sealant layer 113.Peeling becomes more likely to occur, and sealant layer 123 is expanded and stretched to become thinner, forming weakly bonded portion 132 and eventually weak portion 107. In (5-d) of Fig. 5, reference numeral 130 denotes the sealed packaging film, 131 denotes the thermocompression bonded sealant layer, and 132 denotes the weakly bonded portion of the sealant layer (weak portion: peel-open portion).

[0030] This weakly bonded portion 132 (weak portion 107) is connected to a bag portion (container) 105 filled with a fluid content (filling) 105a, such as liquid or paste-like content, such as soy sauce, sauce, or miso, so that the weakly bonded portion 132 peels off when the bag portion 105 of the package is pressed (applied) 108 by the opener's finger or the like, and the content (filling) 105a can be pushed out (discharged or poured out) from the weakly bonded portion 132 (weak portion 107) as shown in Fig. 4. Reference numeral 109 denotes the filling (content) to be discharged (poured out).

[0031] The expansion portion 102 (coloring portion for peeling) is formed in a position that overlaps with the horizontal seal 104 (bottom: lower side) sealed by the first horizontal sealing device 8 and the horizontal seal 106 (top: upper side) sealed by the second horizontal sealing device 9 in an area that does not overlap with the vertical seal 103, as shown in (3-a) to (3-d) of Figure 3, and when cut into individual packages P1 by the cutter device 10, at least one expansion portion 102 (coloring portion for peeling) and, in turn, a weakly adhesive portion 132 (weak portion 107) can be formed for each package P1.

[0032] In other words, in the present invention, including the examples described later, an expansion portion 102 (color-developing portion for peeling), which is a peelable range, and even a weakly adhesive portion 132 (weak portion 107) can be provided (formed, set) at a position (position of connection) connecting the storage portion filled with the filling material and the edge of the packaging bag P1 or the like (the outside of the horizontal seal or vertical seal). In FIG. 3, symbol F4 denotes a tubular packaging film formed by a former guide 5, and F5 denotes a continuous bag-shaped packaging film having a bag portion 105 sealed vertically and horizontally and filled with contents (filling) 105a.

[0033] In this manner, in this embodiment, when filling and manufacturing (producing) a packaging bag that can be peeled and opened by applying pressure (pressure) to the bag portion using an automatic filling and packaging machine, A portion of a laminated packaging film including a printed layer in the middle that is to be peeled open is irradiated with a laser by a laser device to cause the printed layer to develop color and expand, making it easier for delamination (interlayer peeling) to occur, and the sealant layer is stretched and thinned by the expansion, forming a peel-open portion (weakly adhesive portion 132 and therefore weak portion 107) with reduced seal strength.

[0034] The seal strength at this time can be adjusted by the scanning speed (irradiation time) of the laser irradiation, the irradiation density, and the output. As an example of the adjustment procedure during bag production, first, the horizontal sealing devices 8 and 9 are adjusted and set to obtain optimal sealing conditions for the packaging film and the filled material, and then the laser irradiation settings of the laser device 3 (settings of the laser scanning speed, scanning density, scanning range, laser irradiation output, etc.) are made and appropriately adjusted so that the peel-open portion (weakly adhesive portion 132 and therefore weak portion 107) can be peeled off as desired.

[0035] Furthermore, according to this embodiment, the inner surface of the packaging film is hygienic because the middle layer (printed layer) of the packaging film that does not come into contact with the contents is processed (reacted), and high-quality packaging can be achieved because the packaging film is processed to form a peel-open portion (weakly adhesive portion 132, and therefore weak portion 107) under the optimal sealing conditions for the packaging bag.

[0036] Here, FIG. 6 shows bag making example 2, which is another bag making example (packaging bag example) of the present invention. In bag making embodiment 2, the expanding portion 202 (coloring portion for peeling) is provided near the folded-back end of the packaging film f3 (area not overlapping with the vertical seal 203), for example, as shown in Fig. 6 (6-a) and (6-b), and then, as shown in Fig. 6 (6-c), a horizontal seal 204 (bottom: lower side) is made by the first horizontal sealing device 8, and a horizontal seal 206 (top: upper side) is made by the second horizontal sealing device 9. Then, as shown in Fig. 6 (6-d), when the individual packages P2 are separated by the cutter device 10, at least one expanding portion 202 (coloring portion for peeling) and thus a weak portion 207 are formed for each package P2.

[0037] In FIG. 6, symbol f3 denotes a laminated packaging film having a peel-off coloring portion provided at the portion to be folded back, symbol f4 denotes a tubular packaging film formed by a former guide 5, and symbol f5 denotes a continuous bag-shaped packaging film having a bag portion 205 that is vertically and horizontally sealed and filled with contents (filling) 205a.

[0038] FIG. 7 is a cross-sectional view of the packaging film of FIG. 6 as viewed from the side (thickness direction), in which reference numeral 201 denotes a laser, 210 denotes a laminated packaging film, 211 denotes a base material layer, 212 denotes a printed layer, 213 denotes a sealant layer, 214 denotes a region imparted with peelability, 210a denotes a laminated packaging film imparted with peelability, 230 denotes a sealed packaging film, 231 denotes a heat-pressed sealant layer, and 232 denotes a fragile portion (weak portion) of the sealant layer and a peel-open portion.

[0039] FIG. 8 (8-a) shows bag making example 3, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) 301 of the packaging bag P3 of Example 3 is provided on the folded side, and is formed in a tapered shape with a wider width on the bag portion 305 side (lower end side) of the horizontal seal 306 and a narrower width on the upper end side of the horizontal seal 306.

[0040] FIG. 8(8-b) shows bag making example 4, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) 401 of the packaging bag P4 of the fourth embodiment is provided on the vertical seal 403 side.

[0041] FIG. 8(8-c) shows bag making example 5, which is another bag making embodiment of the present invention. The peel-to-open portion (weak portion) 501 of the packaging bag P5 of Example 5 is provided on the horizontal seal 506 (top, upper side), and information such as the production date and expiration date is printed nearby with markings 502. The markings 502 are applied by the same laser device 3 as the peel-to-open portion (weak portion) 501, although the laser irradiation conditions are appropriately adjusted to be suitable for printing. In the figure, the printing is done on the horizontal seal portion, but this is not limited to this, and patterns, letters, symbols, etc. can be printed in any appropriate specified area (area where the printing layer is located) other than the peel-to-open portion (weak portion).

[0042] FIG. 8(8-d) shows bag making example 6, which is another bag making embodiment of the present invention. The peel-to-open portion (weak portion) 601 of the packaging bag P6 of the sixth embodiment is provided at the corner portion on the vertical seal 603 side (the portion intersecting with the horizontal seal 606).

[0043] FIG. 9(9-a) shows bag making example 7, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) 701 of the packaging bag P7 of Example 7 is provided on a horizontal seal (top, upper side) 706 of the stick-shaped (vertical pillow-shaped) packaging body. Reference numeral 703 denotes a vertical seal, 704 denotes a horizontal seal (bottom, lower side), and 705 denotes a bag portion in which contents 705a are accommodated.

[0044] FIG. 9(9-b) shows bag making example 8, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) 801 of the packaging bag P8 of Example 8 is provided at the so-called bottle mouth portion 802. The peel-open portion (weak portion) 801 is provided on the bottle mouth portion 802, and the bottle mouth is provided so that liquid pressure is easily concentrated on the peel-open portion (weak portion) 801. The bottle mouth portion 802 is provided in a convex shape (concave toward the horizontal seal 806 side) at the upper end of the bag portion 805, and when the bag portion 805 is pressed (pressurized), the contents 805a gather at the bottle mouth portion 802 and therefore at the peel-open portion (weak portion) 801, which can contribute to enabling opening (discharge of the contents 805a) to be performed accurately (without failure).

[0045] In other words, in the present invention, the storage section for the filled material formed by heat sealing the packaging bag has a convex portion on at least one side (bottle mouth portion 802 is an example of this), and a peel-and-open portion (weak portion) 801, which is a peelable range, can be provided (formed, set) at a position (position of connection) connecting the convex portion (bottle mouth portion 802 is an example of this) and the edge of the packaging bag.

[0046] FIG. 10 (10-a) shows bag making example 9, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) of the packaging bag P9 of Example 9 is provided in multiple stages on a horizontal seal (or vertical seal) 901. Specifically, a first peel-open portion (weak portion) 903 is provided on the innermost side (lowest part in the figure) close to the contents 902, a second peel-open portion (weak portion) 904 is provided at the intermediate position (middle in the figure), and a third peel-open portion (weak portion) 905 is provided on the outermost side (top part in the figure). The ease of peeling for each set range can be changed by adjusting the scanning density of the laser 101 of the laser marker 100. Specifically, peeling becomes easier when the scanning density of the laser 101 of the laser marker 100 is increased. In the figure, first, second, and third peel-to-open portions 903, 904, and 905 are provided on horizontal seal 901 in that order from the inside of the bag to the outside of the bag, and the laser scanning density is adjusted to 1>2>3 so that the portions are easily peeled in the order 1>2>3. In this configuration, peeling and unsealing can be started even with weak pressure (pressure). Once peeling has started, less pressure (pressure) is required for peeling, so the ease of peeling is set in the order described above.

[0047] FIG. 10 (10-b) shows bag making embodiment 10, which is another bag making embodiment of the present invention. The peel-open portion (weak portion) of the packaging bag P10 of Example 10 is provided in multiple stages on a horizontal seal (or vertical seal) 1001. Specifically, a first peel-open portion (weak portion) 1003 is provided on the innermost side (lowest part in the drawing) close to the contents 1002, a second peel-open portion (weak portion) 1004 is provided at the intermediate position (middle part in the drawing), and a third peel-open portion (weak portion) 1005 is provided on the outermost side (top part in the drawing). In the figure, first, second, and third peel-to-open portions 1003, 1004, and 1005 are provided in order from the inside of the bag to the outside of the bag on a horizontal seal (or vertical seal) 1001, and the laser scanning density is adjusted so that 1<2<3 is the order of ease of peeling in the order 1<2<3. In this configuration, in order to prevent accidental opening (to prevent the seal from being easily opened due to vibration or impact during transportation, etc.), the strongest pressure (pressure) is required at the beginning of peeling.

[0048] In this way, the present invention uses an automatic filling and packaging machine (filling and packaging machine) to produce (make) a packaging bag that can be peeled and opened by applying pressure (pressure) to the bag portion, A laser device is used to irradiate a printed layer in the middle of a laminated packaging film in a portion intended to be peeled open, causing the printed layer to develop color and expand, thereby causing delamination (interlayer peeling), and the sealant layer is stretched and thinned by the expansion, forming a peel-open portion (weak portion for peeling, weak portion) with reduced seal strength.

[0049] The seal strength (ease of peeling) at this time can be adjusted by the scanning speed (irradiation time) of the laser irradiation, the irradiation density, and the output.

[0050] As an example of the adjustment procedure when making bags, first adjust and set up the optimal sealing conditions to match the packaging film and the filled material, and then adjust the laser irradiation settings of the laser device (laser scanning speed, density, output, etc.) so that the opening part can be peeled off.

[0051] Since the middle layer of the packaging film that does not come into contact with the contents is processed (reacted), the inner surface of the packaging film is hygienic, and since the packaging film is processed to form a peel-open area based on the optimal sealing conditions for the packaging bag, high-quality packaging can be achieved.

[0052] The present invention is hygienic because only the intermediate printed layer of the laminated packaging film is reacted and the surface of the packaging film is not processed.

[0053] In addition, by installing it in an automatic filling and packaging machine, the laser irradiation conditions of the laser device can be changed to form the peel-to-open portion based on the optimal packaging conditions (filling speed of the filling material, sealing temperature, and sealing pressure), making it possible to produce packaging bags with a peel-to-open portion (weak portion) without compromising the packaging quality.

[0054] In addition, the present invention allows the use of a general laminated packaging film with an intermediate printed layer, making it possible to produce a packaging bag with a high-quality peel-to-open portion (weak portion) while keeping packaging material costs down. In other words, there is no need for a special, expensive functional film for producing a packaging bag with a peel-to-open portion (weak portion).

[0055] In addition, in the present invention, the peel-open portion coincides with the colored portion, so the user (opener) can easily see the open portion. Also, the expanded portion formed in the sealed portion allows the user to feel the open position (see reference numerals 102 and 107 in FIG. 5(5-d)).

[0056] In addition, in the present invention, the ease of peeling off the peel-open portion (weak portion) can be changed (adjusted) by changing (adjusting) the scanning speed, scanning density, and focal position of the laser. More specifically, peeling becomes easier when the scanning density of the laser of the laser marker is increased, and peeling becomes easier when the scanning speed of the laser is slowed.

[0057] In addition, in the present invention, for example, in FIG. 10 (10-a), first, second, and third peel-to-open portions 903, 904, and 905 are provided on a seal 901 in that order from the inside to the outside of the bag portion in which contents 902 are contained, and the laser scanning density is adjusted to be 1>2>3 so that the portions are easily peeled off in the order 1>2>3. In this configuration, peeling and opening can be started with weak pressure (pressure) and gradually becomes more difficult to peel, so even weak users such as the elderly and children can easily open it, and the gradual difficulty in peeling prevents the contents from accidentally protruding. Note that it is also possible to adjust the entire peel-and-open part to be opened with weak pressure (pressure) in order to prioritize ease of opening, but since peeling usually becomes easier as peeling progresses, if the entire seal strength is the same, it is expected that the contents will accidentally protrude, so it is preferable to adjust the ease of opening in stages as shown in (10-a) in Figure 10 so that opening progresses gradually.

[0058] Also, in the present invention, for example, in Figure 10 (10-b), first, second, and third peel-to-open portions 1003, 1004, and 1005 are provided on a seal 1001 in that order from the inside to the outside of the bag portion in which contents 1002 are contained, and the laser scanning density is adjusted to be 1<2<3 so that peeling is easier in the order 1<2<3. In this configuration, in order to prevent accidental opening (to prevent the seal from being easily opened due to vibration or impact during transportation, etc.), the strongest pressure (pressure) is required at the beginning of peeling.

[0059] Furthermore, in the present invention, by inputting shape diagram data of the peel-open portion into the laser device 3, it is possible to set the peel-open portion in any shape without replacing parts and equipment, thereby providing a user-friendly device that is easy to use.

[0060] In addition, since the present invention is a method using a laser marker that prints on a general intermediate printing layer, if the laser marker is already installed for printing purposes, the laser irradiation can be adjusted, and it is capable of forming a peel-to-open portion (weak portion), the present invention can be realized without increasing equipment costs, etc. In addition, the laser marker can be used for both printing and providing a peel-to-open portion, which is also economical.

[0061] In addition, in the present invention, a laser device that scrapes the surface of the packaging film, such as a CO2 laser (wavelength 10600 μm), is not preferred because it conflicts with the problems of the invention. Therefore, in the present invention, it is preferable to use a laser device that irradiates a laser with a relatively short wavelength of 355 μm (ultraviolet laser) to 1064 μm (IR laser).

[0062] Furthermore, if processing similar to that of the present invention is performed during the production of the packaging film rather than on an automatic filling and packaging machine, the packaging (sealing) conditions must be set within a range of conditions that allow the peel-to-open portion to be peeled off, which means that the packaging quality must be compromised. Therefore, in the present invention, it is extremely advantageous to place a laser device on the automatic filling and packaging machine and form the peel-to-open portion (weak portion) immediately before packaging.

[0063] In the present invention, the storage section for the filling (contents) formed by heat sealing the packaging bag has at least two chambers, and the laser device can be configured to set the peelable range so as to connect the storage sections of the two chambers. This is useful when, for example, two or more fillings (contents) such as liquid A and liquid B are to be mixed immediately before use.

[0064] The above-described embodiment is merely an example for explaining the present invention, and it goes without saying that various modifications can be made without departing from the gist of the present invention. [Explanation of symbols]

[0065] 1 Filling and packaging machine (automatic filling and packaging machine) 2 Packaging shaft 3 Laser equipment 3a Laser protection cover 3b Irradiation position adjustment mechanism 4 Packaging material feeder 5 Former Guide 6 Filling Nozzle 7 Vertical sealing device 8. First horizontal sealing device 9. Second horizontal sealing device 10 Cutter device 11. Carry-out slide 12 Operation Panel 100 Laser Marker 101 Laser 103 Vertical seal 104 Horizontal seal (bottom) 105 Bag portion (containing the filling material (contents)) 105a Filling (contents) 106 Horizontal seal (top) 107 Peeling opening part 108 Compression for peeling and opening (pressure) 109 Filling (contents) to be discharged (poured) 110 Laminated packaging film (surface side) 111 Base material layer 112 Printing layer 113 Sealant Layer 110a Laminated packaging film with peelability (surface side) 120 Laminated packaging film (reverse side) 121 Base material layer 122 Printing layer 123 Sealant Layer 130 Sealed packaging film 131 Heat-pressed sealant layer 132 Weakly bonded part of the sealant layer (weak part: part to be peeled and opened) F1 Roll-type laminated packaging film P1 Packaging bag (packaging body)

Claims

1. A filling and packaging machine that pulls out and conveys a strip-shaped laminated packaging film wound in a roll, performs heat sealing in the vertical and horizontal directions to form a bag, and fills a fluid content to manufacture a packaging bag, The laminated packaging film includes at least a laser-transmittable base layer, an intermediate layer disposed in contact with the base layer and expanding in response to laser irradiation, and a sealant layer disposed in contact with the intermediate layer on the opposite side of the base layer, The heat sealing is performed in a state where the sealant layers of the laminated packaging film face each other, The filling and packaging machine is equipped with a laser device that, at any stage before the heat sealing, irradiates a laser onto a preset peelable region including a planned region of the laminated packaging film to be heat-sealed, thereby forming an expanded portion in the intermediate layer, thereby reducing the seal strength between the sealant layers by the heat sealing and imparting peelability. A filling and packaging machine characterized by the above.

2. The filling and packaging machine described in claim 1, characterized in that the laser device adjusts the ease of peeling by lowering the seal strength by slowing down the laser scanning speed for the peelable area, and adjusts the difficulty of peeling by increasing the seal strength by increasing the laser scanning speed.

3. The filling and packaging machine of claim 1 or 2, characterized in that the laser device adjusts the ease of peeling by lowering the seal strength by increasing the laser irradiation density for the peelable range, and adjusts the difficulty of peeling by increasing the seal strength by decreasing the laser irradiation density.

4. 4. A filling and packaging machine according to claim 1, wherein the laser device sets the peelable range at two or more locations within a range corresponding to one packaging bag.

5. The filling and packaging machine according to claim 4 , wherein the laser device sets the two or more peelable ranges to different laser scanning speeds or laser irradiation densities.

6. 6. A filling and packaging machine according to claim 1, wherein the laser device prints a pattern, letter or symbol in a predetermined area of ​​one packaging bag.

7. A filling and packaging machine as described in any one of claims 1 to 6, characterized in that the laser device sets a peelable range at a position connecting the storage section for the filled material formed by heat sealing the packaging bag and an edge of the packaging bag.

8. A filling and packaging machine as described in any one of claims 1 to 6, characterized in that the storage section for the filled material formed by heat sealing the packaging bag has a convex portion on at least one side, and the laser device sets a peelable range at a position connecting the convex portion and an end side of the packaging bag.

9. A filling and packaging machine as described in any one of claims 1 to 6, characterized in that the storage section for the filled material formed by heat sealing the packaging bag has at least two chambers, and the laser device sets the peelable range so as to connect the two storage sections.

10. 10. A filling and packaging machine according to claim 1, wherein the laser device has a laser wavelength set in the range of 355 μm to 1064 μm.

11. A filling and packaging machine as described in any one of claims 1 to 10, characterized in that the packaging bag is a packaging bag in which the filling material is poured out from a position to which peelability has been imparted by the laser device by compressing a storage section filled with the filling material.

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