Folded packaging

Abstract

To provide a rectangular package, such as a stick package or a four-sided sealed package, that contains powder, and by increasing the opening area of ​​the opening of the rectangular package by making the cross-section (opening) of the rectangular package a shape close to a rectangle or circle, the powder contents can be smoothly dropped out from the opening when the package is turned upside down, allowing almost the entire amount to be easily removed. [Solution] The starting point for the fold is set on the approximately perpendicular bisector of the virtual opening line of an unopened rectangular powder-containing package made from laminated sheets, i.e., approximately the midpoint of the virtual opening line, and a fold is formed extending vertically or downward from this starting point. By making a fold, when the ends on both sides are lightly pressed after opening, the opening formed by the front and back (rear) surfaces is widened to a shape close to a rectangle or circle, resulting in an opening with an increased opening area, and the powder that remained in the corners of the inverted package falls out completely, making it easy to remove almost all of it.

Description

[[Technical Field]]

[0001] The present invention relates to a creased square package configured such that an opening thereof has a shape close to a rectangle or a circle, so that powder contained in a square package such as a stick package can be discharged at one stroke. [[Background Art]]

[0002] There is known a stick-shaped package in which a body portion is formed by winding a packaging material made of a composite film obtained by laminating films of a printing substrate, a uniaxially stretched polyethylene film, an aluminum foil, and a polyolefin resin in this order with the printing substrate facing outward, upper and lower seal portions are formed such that a joint of the body portion is positioned at a back portion, and a crease is provided on the body portion along the upper and lower end portions (see Patent Document 1).

[0003] There is known a laminate for a pillow-type pouch, which is formed into a bag using a laminate including at least a base layer and / or an intermediate layer and a heat-seal layer as a packaging material having a smooth and easy opening function and sealability for contents when circular unsealing is performed from a back seal portion in a pillow-type pouch, wherein a cut portion is provided on one side of the laminate forming the back seal portion, an easy-cutting portion or an easy-tearing portion having a width wider than the width of the cut portion is provided on an outer seal portion located further outward than the position where the cut portion is provided, and a release layer is provided in a region including the cut portion, wherein the cut is a half cut reaching from the base layer to a part of the heat-seal layer of the laminate (see Patent Document 2).

[0004] There is known a stick packaging bag, wherein two arc-shaped cuts that contact each other at approximately the center in the width direction are formed near the center in the longitudinal direction on the front surface of the stick packaging bag (the surface opposite to the back surface where the back seal portion is formed), and when holding an end portion of the stick packaging bag and applying a force from the back side near the center portion, the cuts are broken, and the stick packaging bag can be easily opened (see Patent Document 3).

[0005] In liquid-containing packaging where a liquid is sealed in a flexible packaging material, in order to make it easier and more efficient to squeeze out the liquid, it has been proposed to provide a fold line in a predetermined direction on the outer surface of a substantially flat bag body in which a liquid is sealed or folded back as necessary, using a sheet-like flexible packaging material as the material (see Patent Document 4). In this invention, in order to efficiently squeeze out the liquid, the opening area after opening the packaging body becomes very small.

[0006] A laminate and packaging bag are known that can more reliably form a fold, comprising at least a paper material and a sealant layer, having a fold line formed by partially cutting the laminate so as to penetrate at least the paper material, having a spout opening line at the opening position of the spout formed from the laminate, the fold line not being connected to the spout opening line, and the fold line being formed on one or both sides of the spout opening line at a position where the extension of the fold line intersects the spout opening line (see Patent Document 5).

[0007] The laminated structure comprises a paper substrate, a gas barrier layer, and a heat seal layer which is a dried coating formed on the surface of the gas barrier layer, in this order, with a heat seal layer of 0.27 mm. 2 Heat-sealable paper is known that has 20 or fewer defects per unit, possesses the crease-retaining properties characteristic of paper, maintains sufficient gas barrier properties even after being folded, and contributes to reducing the amount of plastic material used, as well as packaging bags containing the same (see Patent Document 6).

[0008] Furthermore, a small automatic powder packaging machine is known, comprising a forming mechanism that winds a packaging film drawn from a raw material roll around a filling pipe arranged in a single row to form a cylindrical shape; a sealing mechanism that forms a packaging bag shape from this cylindrical packaging film using a vertical sealing device and a horizontal sealing device; a raw material supply mechanism that fills the packaging bag with powder raw material via the filling pipe; and a cutter device that seals the raw material input opening of the filled packaging bag with the horizontal sealing device and cuts off the area near the center of the horizontal seal of the packaging bag to form individual packaging bags (see Patent Document 7). [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Utility Model Publication No. 3-123844 [Patent Document 2] Japanese Patent Publication No. 2001-58649 [Patent Document 3] Japanese Patent Publication No. 2011-46393 [Patent Document 4] Japanese Patent Publication No. 2015-189479 [Patent Document 5] Japanese Patent Publication No. 2023-72811 [Patent Document 6] Japanese Patent Publication No. 2024-66802 [Patent Document 7] Japanese Patent Publication No. 2007-176500 [Overview of the project] [Problems that the invention aims to solve]

[0010] The object of the present invention is to provide a rectangular package, such as a stick package or a four-sided sealed package, in which powders or granules (although the terms powders and granules may be used differently depending on the size of the particles, in this specification, both are referred to collectively as powders in a broad sense) can be contained and, by increasing the opening area of ​​the rectangular package's opening section (opening) by making it a rectangular or nearly circular shape, the powder contents can be smoothly released from the opening when the package is turned downwards, allowing almost the entire amount to be easily removed. [Means for solving the problem]

[0011] The present invention was completed by establishing a fold starting point on the approximately perpendicular bisector of the virtual opening line of an unopened rectangular powder-containing package made from laminated sheets, i.e., approximately the midpoint of the virtual opening line, and forming a fold extending vertically or downwards from this starting point. By creating the fold, the opening formed by the front and back (rear) surfaces can be widened to a shape close to a rectangle or circle by lightly pressing both ends after opening, resulting in an increased opening area. This allows almost all of the powder that remained in the corners of the inverted package to fall out, making it easy to remove.

[0012] In other words, the present invention relates to an invention defined by the following: [1] A rectangular packaging body for containing powder, formed from a laminated sheet, wherein the approximate midpoint of the intended opening line of the rectangular packaging body for containing powder is the starting point for the fold, and one or more folds extending vertically or downward from the starting point for the fold. [2] The powder-containing rectangular packaging described in [1] above, characterized in that the rectangular packaging is a pillow packaging. [3] The powder-containing rectangular packaging described in [2] above, characterized in that the pillow packaging is a stick packaging. [4] The powder-containing rectangular packaging according to [3] above, characterized in that the virtual opening line of the stick packaging is a virtual line extending laterally from the body of the stick packaging. [5] The powder-containing rectangular packaging body according to [3] above, characterized in that the stick packaging body has a bottom seal portion with rounded ends on both sides, and the corners of the lower ends on both sides inside the packaging body are rounded. [6] The powder-containing rectangular packaging described in [1] above, characterized in that the rectangular packaging is a three-sided sealed packaging or a four-sided sealed packaging. [7] The powder-containing rectangular packaging according to [6] above, characterized in that the virtual opening line of the three-sided sealed packaging and the four-sided sealed packaging is a virtual line extending laterally from the cut of the lateral longitudinal seal band. [8] A rectangular powder-containing packaging according to any one of [1] to [7] above, characterized in that the folds are fold lines created by mechanical processing during the process of forming a packaging body from a laminated sheet state. [9] A rectangular powder-containing packaging according to any one of the above [1] to [7], characterized in that the fold is a half-cut by laser processing. [Effects of the Invention]

[0013] After opening rectangular packaging such as stick packaging, pillow packaging, three-sided sealed packaging, or four-sided sealed packaging along a virtual opening line, lightly pressing both ends expands the opening formed by the front and back (rear) sides into a shape close to a rectangle or circle, increasing the opening area. This allows any powder that remained in the corners of the inverted packaging to fall out completely, making it easy to remove almost all of it. [Brief explanation of the drawing]

[0014] [Figure 1] The images show a front view (a) of the stick packaging (single fold type) of the present invention before opening, a front view (b) of the back, a perspective view (c) after opening, and a perspective view (d) showing the bottom seal portion with rounded edges on both sides. [Figure 2] These are a front view (a) of the three-sided sealed packaging (single fold type) of the present invention, a front view (b) of the back before opening, and a perspective view (c) after opening. [Figure 3]Fig. 1(a) is a front elevation view of the front surface and Fig. 1(b) is a front elevation view of the back surface before opening of the four-side sealed package (one crease type) according to the present invention, and Fig. 1(c) is a perspective view after opening. [Figure 4] Fig. 2(a) is a front elevation view of the front surface before opening, and Fig. 2(c) is a perspective view after opening of the stick package (two creases type) according to the present invention. [Figure 5] Fig. 3(a) is a front elevation view of the front surface before opening, and Fig. 3(c) is a perspective view after opening of the three-side sealed package (two creases type) according to the present invention. [Figure 6] Fig. 4(a) is a front elevation view of the front surface before opening, and Fig. 4(c) is a perspective view after opening of the four-side sealed package (two creases type) according to the present invention. DETAILED DESCRIPTION OF EMBODIMENTS

[0015] The rectangular package of the present invention is characterized in that the package has one or two or more creases, and differs from an existing rectangular package only in that the package has a crease at a specific portion. In view of ease of processing, the one crease type is preferable for the number of creases, but a plurality of 2 to 5 creases can also be adopted depending on the shape, size, material and the like of the rectangular package.

[0016] The rectangular powder-containing package formed of the laminated sheet of the present invention (one crease type) is not particularly limited as long as it is a pillow package, preferably a stick package, a three-side sealed package, or a four-side sealed package, which has the approximate midpoint of the planned virtual unsealing line of the rectangular powder-containing package as a crease starting point, and has a crease extending vertically or downward from the crease starting point; the term "approximate" in the approximate midpoint refers to a range of 5 mm vertically and horizontally, preferably 3 mm, more preferably 1 mm.

[0017] The rectangular powder-containing package formed of the laminated sheet of the present invention (plural creases type) is not particularly limited as long as it is a pillow package, preferably a stick package, a three-side sealed package, or a four-side sealed package, which has a plurality of points on the planned virtual unsealing line of the rectangular powder-containing package as crease starting points, and has a plurality of creases extending vertically or downward from the crease starting points; the plurality of crease starting points are preferably provided on the planned virtual unsealing line.

[0018] The above-mentioned pillow packaging is a packaging in which the upper and lower open ends of a tubular laminated sheet for packaging are heat-sealed, and a stick packaging can be suitably exemplified as such a pillow packaging.

[0019] The present invention will be described below based on preferred embodiments. The forms shown in the figures are examples, and for example, the cut edges can be arbitrarily changed depending on the material and contents of the laminated sheet. Furthermore, as a type with multiple folds, the type with two folds will be described as an example. In the following description, "front" refers to the front surface in Figures 1(a) to 3(a), and "back" or "rear" refers to the front surface in Figures 1(b) to 3(b). Also, "left and right" refers to the left and right when viewed from the front, and "up and down" refers to the up and down when viewed from the front. Furthermore, "horizontal" refers to the horizontal direction from left to right, and "vertical" refers to the vertical direction from up to down.

[0020] Figures 1-3 show examples of the powder-containing rectangular packaging (single fold type) of the present invention. The stick packaging 10 shown in Figure 1 has a front body 11 and a back body 12, a vertical seal portion 13 provided on the back body 12, an upper seal portion 14a and a lower seal portion 14b, a cut mark 16, a virtual opening line 17, a fold 18, and an opening after opening 19. The three-sided sealed packaging 20 shown in Figure 2 has a front body 21 and a back body 22, an upper seal portion 23, a left seal portion 24a and a right seal portion 24b, a folded portion 25, a cut 26, a virtual opening line 27, a fold 28, and an opening after opening 29. The four-sided sealed packaging 30 shown in Figure 3 has a front surface 31 and a back surface 32, an upper sealing portion 33a and a lower sealing portion 33b, a left sealing portion 34a and a right sealing portion 34b, a cut edge 36, a virtual opening line 37, a fold line 38, and an opening 39 after opening.

[0021] Figures 4-6 also show an example of the powder-containing rectangular packaging (two-fold type) of the present invention. The stick packaging 10 shown in Figure 4 has a front body 11 and a back body 12, a vertical seal portion 13 provided on the back body 12 (back view omitted in Figure 4), an upper seal portion 14a and a lower seal portion 14b, a cut mark 16, a virtual opening line 17, two folds 18a and 18b, and an opening 19 after opening. The three-sided sealed packaging 20 shown in Figure 5 has a front body 21 and a back body 22 (back view omitted in Figure 5), an upper seal portion 23, a left seal portion 24a and a right seal portion 24b, a folded portion 25, a cut 26, a virtual opening line 27, two folds 28a and 28b, and an opening 29 after opening. The four-sided sealed packaging 30 shown in Figure 6 has a front surface 31 and a back surface 32 (back surface view omitted in Figure 6), an upper sealing section 33a and a lower sealing section 33b, a left sealing section 34a and a right sealing section 34b, a cut edge 36, a virtual opening line 37, two folds 38a and 38b, and an opening 39 after opening.

[0022] The powder-containing rectangular packaging (10, 20, 30) of the present invention is a powder-containing rectangular packaging formed from a laminated sheet, having a virtual opening line (17, 27, 37) for the rectangular packaging containing powder P, and folds (18, 28, 38 / 18a, 18b; 28a, 28b; 38a, 38b) extending vertically or downward from the starting point of the fold on the virtual opening line, and if there is a cut mark (16) which is a pre-provided opening start part on the rectangular packaging, the opening start part (26, 36 A rectangular powder-containing package formed from a sheet-like laminate is preferred, characterized in that, if there is a cut, it is opened along the virtual opening line (17, 27, 37) from the cut, and then the body is pressed from the side to make a mountain fold (when viewed from the front) along the fold line (18, 28, 38 / 18a, 18b; 28a, 28b; 38a, 38b) to create an opening (19, 29, 39) with an increased opening area, the opened rectangular package is then inverted, and the contained powder P is dropped from the opening with an increased opening area containing the powder P. Suitable examples of such rectangular packages include pillow packages such as stick packages (10), three-sided sealed packages (20), or four-sided sealed packages (30), but for convenience, packages with a shape in which the width of the top and / or bottom of the rectangular package is reduced, or packages with a shape in which the height of the left and / or right of the rectangular package is reduced are also included.

[0023] The rectangular packaging of the present invention differs from existing rectangular packaging only in that it has folds (18, 28, 38 / 18a, 18b; 28a, 28b; 38a, 38b), preferably half-cuts, in specific parts of the packaging. Except for the folds, preferably half-cuts, existing rectangular packaging technology (materials and manufacturing methods) can be used (see Patent Documents 1 to 7).

[0024] For example, a stick-type packaging 10 (single fold) can be manufactured by heat-sealing (vertical sealing) the longitudinal edges of a strip-shaped laminated sheet to form a cylindrical body, and then heat-sealing (horizontal sealing) the upper and lower ends of this cylindrical body. By bonding the left and right edges of the film material together and sealing them vertically, a front body 11 and a back body 12 are formed, and a vertical sealing portion 13 is provided on the back body 12. Furthermore, by horizontally sealing the cylindrical body, an upper sealing portion 14a and a lower sealing portion 14b are formed. First, the lower sealing portion 14b is formed, and after filling with powder from above, the top is sealed to form the upper sealing portion 14a, so the body of the cylindrical body becomes flattened to contain the powder P. A virtual opening line 17 can be assumed horizontally from this flattened front body 11. In this case, there may or may not be a cut line indicator 16 at the end of the body side of the un-horizontally sealed portion. If there is a cut mark 16, a virtual opening line 17 is assumed to extend horizontally from the cut mark 16 on the front of the body 11, and a fold line 18, such as a half-cut, is provided vertically or downward from approximately the midpoint of this assumed opening line 17. In a preferred embodiment, if there is a cut mark 16 at the body-side end of the unsealed portion slightly below the upper seal portion 14a of the front of the body 11, a virtual opening line 17 is assumed to extend horizontally from the cut mark 16 on the front of the body 11, and a fold line 18, such as a half-cut, is provided vertically or downward from approximately the midpoint of this assumed opening line 17. If there is no cut mark 16, a virtual opening line 17 is assumed to be in the lateral direction of the upper seal portion 14a of the front surface of the body portion 11, preferably the unsealed portion below the upper seal portion 14a of the front surface of the body portion 11, or the opening line 17 can be indicated by a dashed line, and a fold line 18 such as a half-cut is provided in the vertical direction or downward from approximately the midpoint of this assumed or indicated opening line 17.

[0025] When removing the powder P from the stick packaging 10 (single fold type), the opening line 17 on the body is torn horizontally, the opening end is pressed from both sides to bring the left and right sides of the opening end closer together with the fold 18 (mountain fold) as the boundary, thereby increasing the opening area, and then the stick packaging 10 is inverted, allowing the powder P to fall out through the enlarged opening 19 and be removed. Alternatively, the opening line 17 on the body is torn horizontally, the stick packaging 10 is tovert, and then the downward opening end is to be pressed from both sides to bring the left and right sides of the opening end closer together with the fold 18 as the boundary, thereby increasing the opening area, and then the powder P can be dropped out through the enlarged opening 19 and be removed. Furthermore, in order to more reliably remove the powder P that has accumulated in the lower corners of the stick packaging 10, the lower seal portions on the left and right lower ends 14c of the stick packaging 10 are made rounded, so that the corners of the left and right lower ends 14c inside the packaging are rounded, and the powder P can be discharged smoothly.

[0026] The three-side sealed packaging 20 (single fold type) is made by folding a single laminated sheet in half to form a folded portion 25, and heat-sealing the remaining three sides to form an upper seal portion 23, a left seal portion 24a, and a right seal portion 24b. However, the three-side sealed packaging 20 can be made by filling the packaging with powder P while at least one of the upper seal portion 23, left seal portion 24a, and right seal portion 24b is unsealed, and then heat-sealing that one portion. In this three-side sealed packaging 20, at least one of the left seal portion 24a and the right seal portion 24b is preferably provided with a cut 26 at the top. A virtual opening line 27 is assumed to extend horizontally from this cut 26, and a fold 28, such as a half-cut, is provided vertically or downward from approximately the midpoint of this assumed opening line 27.

[0027] When removing the powder P from the three-sided sealed packaging 20 (single fold type), the packaging is torn horizontally from the cut 26 along the intended opening line 27, and the opening ends are pressed from both sides to bring the left and right sides of the opening end closer together with the fold 38 as the boundary, thereby increasing the opening area to make the opening a shape close to a rectangle or circle. Then, the three-sided sealed packaging 20 is inverted, and the powder P can be dropped and removed from the enlarged opening 29.

[0028] The four-sided sealed packaging 30 (single fold type) is made by overlapping two laminated sheets and heat-sealing all four sides (top, bottom, left, and right) to form an upper seal portion 33a and a lower seal portion 33b, and a left seal portion 34a and a right seal portion 34b. However, the four-sided sealed packaging 30 can be made by filling the packaging with powder while at least one of these four seal portions (seal strips) is unsealed, and then heat-sealing that one portion. In this four-sided sealed packaging 30, a cut 36 is provided in at least one of the left seal portion 34a and the right seal portion 34b, preferably at the top of at least one of the left seal portion 34a and the right seal portion 34b. A virtual opening line 37 is assumed to extend horizontally from this cut 36, and a fold 38, such as a half-cut, is provided vertically or downwards from approximately the midpoint of this assumed opening line 37.

[0029] When removing the powder P from the four-sided sealed packaging 30 (single fold type), the packaging is to be torn horizontally from the cut 36 along the intended opening line 37, and the opening ends are pressed from both sides to bring the left and right sides of the opening end closer together with the fold 38 as the boundary, thereby increasing the opening area to make the opening a shape close to a rectangle or circle. Then, the four-sided sealed packaging 30 is inverted, and the powder P can be dropped and removed from the enlarged opening 39.

[0030] Furthermore, when removing powder P from, for example, a two-fold type stick packaging 10, a three-sided sealed packaging 20, or a four-sided sealed packaging 30, the packaging can be torn horizontally along the intended opening lines (17, 27, 37) from the cut (16, 26, 36), and the opening end is pressed from both sides to bring the left and right sides of the opening end closer together with the two folds (18a, 18b; 28a, 28b; 38a, 38b) as boundaries, thereby increasing the opening area to a rectangular or nearly circular shape. After that, the stick packaging 10, the three-sided sealed packaging 20, or the four-sided sealed packaging 30 is inverted, and the powder P can be dropped and removed from the enlarged opening (19, 29, 39).

[0031] The powder-containing rectangular packaging bodies (10, 20, 30) of the present invention are formed from laminated sheets. As mentioned above, conventional laminated sheets used to produce packaging bodies can be used, but a laminated film having a base layer / intermediate layer / heat-seal layer as its basic structure is preferably used. Various synthetic resin films and paper materials can be used as the base layer, but the effects of the present invention are more pronounced when paper materials are used. The material of the heat-seal layer is not particularly limited, but polyolefin resins are generally used.

[0032] The means for forming the folds (19, 29, 39) are not particularly limited, but may include optical processing means such as lasers, mechanical processing means such as die cutters, punching blades, and bending. When fold processing is performed by laser processing, half-cut defects are formed at least on the outer layer (base layer). When the half-cut process is performed by a laser processing device, the position and size (depth, length) of the half-cuts can be easily adjusted. The laser processing device is preferably a carbon dioxide laser, YAG laser, or UV laser, and the laser wavelength is preferably selected appropriately according to various conditions such as the composition and thickness of the laminated film for bag making, but it is more preferable to process to 20% to 60% of the thickness of the laminated film. When folding is performed by mechanical processing, the processing, such as cutting or folding, can be done in a filling machine for forming rectangular packaging for powders when the laminated sheet is being transported. [Explanation of Symbols]

[0033] 10 stick-type packaging 11 Front of the fuselage 12 Rear of the torso 13 Vertical seal section 14a Upper seal section 14b Lower seal section 14c Rounded edges on both sides of the lower seal. 16 Cut display 17 Virtual Opening Plan Line 18 folds 18a fold 18b fold 19. Opening after opening 20 Three-side seal packaging 21 Front 22 Back 23 Upper seal section 24a Left seal section 24b Right seal section 25 Folded section 26 Cut 27 Virtual Opening Plan Line 28 folds 28a fold 28b fold 29 Opening after opening 30 square-sided sealed packaging 31 Front 32 Back 33a Upper seal portion 33b Lower seal section 34a Left seal section 34b Right seal section 36 Cut 37 Virtual Opening Plan 38 folds 38a fold 38b fold 39 Opening after opening P powder

Claims

1. A rectangular packaging body for containing powder, formed from a laminated sheet, wherein the starting point for the fold is approximately the midpoint of the intended opening line of the rectangular packaging body containing the powder, and the rectangular packaging body has one or more folds extending vertically or downwards from the starting point for the fold.

2. The rectangular packaging for powder according to claim 1, characterized in that the rectangular packaging is a pillow packaging.

3. The powder-containing rectangular packaging according to claim 2, characterized in that the pillow packaging is a stick packaging.

4. The powder-containing rectangular packaging according to claim 3, characterized in that the virtual opening line of the stick packaging is a virtual line extending laterally from the body of the stick packaging.

5. The powder-containing rectangular packaging according to claim 3, characterized in that the stick packaging has a rounded bottom seal portion at both ends, and the corners of the lower ends on both sides inside the packaging are rounded.

6. The powder-containing rectangular packaging according to claim 1, characterized in that the rectangular packaging is a three-sided sealed packaging or a four-sided sealed packaging.

7. The powder-containing rectangular packaging according to claim 6, characterized in that the virtual opening line of the three-sided sealed packaging and the four-sided sealed packaging is a virtual line extending laterally from the cut of the lateral longitudinal seal band.

8. The rectangular powder-containing packaging according to any one of claims 1 to 7, characterized in that the folds are fold lines resulting from mechanical processing during the process of forming a packaging body from a laminated sheet state.

9. A rectangular powder-containing packaging according to any one of claims 1 to 7, characterized in that the fold is a half-cut made by laser processing.

Images