JP6623713B2 - Packaging bag with pouring aid and spout - Google Patents

Description

  The present invention relates to a pour-out auxiliary member and a packaging bag with a spout.

  A packaging bag with an elongated spout is convenient for transferring the contents of the packaging bag to another container with a narrow opening. However, if the elongated spout is composed only of the soft front and back films, the spout may wobble and spill the contents. Also, it is difficult to take out the contents without crushing the packaging bag. Further, if the front and back films at the spout are adhered to each other, it is difficult to take out the contents.

  Therefore, it has been proposed to provide a somewhat rigid auxiliary member in the spout. Patent Literature 1 discloses a packaging bag in which a pouring auxiliary member having a bottom wall and side walls erected from both ends thereof is mounted in a pouring port. The elongate spout is stabilized by the pouring aid. Further, since the film is supported from the inside by the pouring auxiliary member, the pouring port is not blocked. The contents can be taken out without crushing the packaging bag.

JP 2014-125757 A

  However, in the pouring assistant described in Patent Document 1, the support surface of the side wall supporting the film is formed flat, and the edge of the support surface is formed at an acute angle. Since the film at the spout generally has an outward bulge, if the supporting surface (top) that supports it is flat, it is difficult to use the supporting surface effectively, that is, to support the film over a large area, The force tends to be applied to the film, and the film may be wrinkled. Also, sharp edges can damage the film.

  SUMMARY OF THE INVENTION It is an object of the present invention to suppress the occurrence of wrinkles in a packaging bag (especially at or near the spout) and to prevent the packaging bag from being damaged and torn.

  The spouting assisting member according to the present invention is used by being fixed in the spouting passage of a spouting portion provided with an elongated spouting passage communicating with the inner space of the packaging bag formed at a part of the edge of the packaging bag. A mounting surface portion to be mounted on the packaging bag, and two support portions protruding in the same direction from both side ends of the mounting surface portion in the width direction. The height is greater than the height of the pouring auxiliary member obtained by adding the amount of protrusion of the support portion to the thickness of the mounting surface portion, and the top of the support portion is curved in a convex shape.

  The present invention also provides a packaging bag provided with the above-described pouring auxiliary member. A packaging bag according to the present invention includes a front surface film and a rear surface film, and is formed by a packaging bag body forming an internal space between the front surface film and the rear surface film, and the front surface film and the rear surface film, and communicates with the internal space. A pouring outlet provided with an elongate pouring passage, and a pouring auxiliary member fixed in the pouring passage, wherein the pouring auxiliary member includes a mounting surface, and both ends in the width direction of the mounting surface. And two support portions projecting in the same direction from each other and extending along the longitudinal direction of the pouring passage. The width of the mounting surface portion is obtained by adding the protrusion amount of the support portion to the thickness of the mounting surface portion. The height of the supporting part is larger than the height of the auxiliary pouring member, the top of the supporting part is curved in a convex shape, and the surface of the mounting surface opposite to the surface from which the supporting part protrudes is attached to the back film. Top of the two support portions projecting from the attaching surface is equal to or in contact with the inner surface of the surface film.

  The inner space of the packaging bag body is formed by the front film and the back film. Typically, two films, a front film and a back film, are used, but the packaging bag body can also be made by folding one film. The front film and the back film include a film portion that is located on each of the front surface and the back surface of the packaging bag main body by folding one film. Further, the packaging bag body may be formed from three or more films. For example, by adding a bottom film for forming a gore at the bottom, a packaging bag body can be formed from three films, a front film, a back film, and a bottom film.

  The packaging bag main body is provided with a spout having an elongated spout passage communicating with the internal space thereof, and the spout assisting member is fixed in the spout passage of the spout. It goes without saying that the width of the pouring aid member is smaller than the width of the pouring passage. The length of the pouring aid member has a length corresponding to the length of the pouring passage, but may be longer than the pouring passage. The pouring auxiliary member includes a mounting surface portion and two support portions protruding in the same direction from both ends in the width direction of the mounting surface portion. Since the surface of the mounting surface opposite to the surface on which the support protrudes is mounted on the back film, the front film is supported from the inside by the two supports protruding from the mounting surface. A space (gap) is always secured in the pouring passage at the pouring port.

  According to the present invention, since the width of the mounting surface is larger than the height of the pouring auxiliary member, the overall shape of the cross section of the pouring passage has a substantially elliptical shape having a longitudinal direction in the width direction of the pouring auxiliary member. Will be presented. A large force is not applied to the front film and the back film forming the spout in the direction in which they are separated from each other.

  The surface film forming the spout portion that is supported outward by the provision of the pouring auxiliary member has a bulge outward. Since the top of the support portion has a convex curved shape along the outward bulge, the surface film can be supported from the inside in a wide range of the top of the support portion. Thereby, a local force is hardly applied to the surface film, and the force applied to the film is dispersed, so that the film is less likely to be wrinkled. In addition, since the top of the supporting portion smoothly contacts the inner surface of the surface film, there is no possibility of damaging the surface film. The appearance of the packaging bag can be maintained beautifully (without wrinkles), and the packaging bag can be prevented from being damaged or broken by the support of the pouring auxiliary member.

  Preferably, in the pouring assistant, all edges of the support portion and all edges of the mounting surface are convexly curved. Even when any part of the pouring auxiliary member comes into contact with the front or back film when the pouring auxiliary member is attached to the spout, damage to the front and back films is suppressed.

  In a preferred embodiment, the pouring auxiliary member is formed of a synthetic resin having mechanical strength that does not collapse when mounted in the pouring passage. It is suppressed that the space of the pouring passage is narrowed due to deformation of the pouring auxiliary member.

It is a front view of a pouch bag with a spout. FIG. 2 is a sectional view taken along the line II-II in FIG. 1. FIG. 3 is an enlarged end view along the line III-III in FIG. 1. It is an expansion perspective view of a pouring assistance member.

  FIG. 1 is a partially cutaway front view of a pouch bag (packaging bag) with a spout before filling the contents. In FIG. 1, a range indicated by a fine dot pattern on the periphery of the pouch bag is a sealing range. FIG. 2 is a sectional view taken along the line II-II in FIG. In FIG. 2, for the sake of simplicity, the upper part is open, the state in which the distance between the front and back films described later is slightly widened is shown, and the thickness of the film is emphasized. FIG. 3 is an enlarged end view taken along the line III-III of FIG. FIG. 4 is an enlarged perspective view of a pouring auxiliary member described later.

  The pouch bag 1 with a spout includes a pouch bag body 10 and a pouring auxiliary member 30.

  When viewed from the front, the pouch bag main body 10 is a cylindrical body having a vertically long rectangular shape with four corners rounded, and a front film 11 and a back film 12 forming the front and back surfaces thereof, It is a so-called bottom gusset type (standing type) including a bottom film 13 forming a gore portion at the bottom. The front, back and bottom films 11, 12 and 13 constituting the pouch bag body 10 are each composed of one film (seamless film). The outer edges of the front and back films 11, 12 are sealed to each other on both sides of the pouch bag body 10, and the outer edge of the bottom film 13 and the outer edges of the front and back films 11, 12 are mutually sealed at the lower part of the pouch bag body 10. Sealed. Sealing is performed by bonding (including welding) between the films. Before filling the contents, only the upper part of the pouch bag main body 10 is open, and the bottom film 13 is folded in a mountain fold at the center thereof, and is sandwiched between the front film 11 and the back film 12 .

  The contents are filled from the top of the opened pouch bag main body 10. In general, other liquids such as cosmetics such as lotion and emulsion, foods such as water, juice, soy sauce, vinegar, oil, and dressing, disinfectants, chemicals such as shampoo and rinse are filled. Of course, any powdery or granular material may be filled as long as it passes through the passage of the spout 20 described later.

  When the contents are filled, the bottom film 13 is unfolded and gradually spreads downwardly. The distance between the front film 11 and the rear film 12 gradually increases, and the internal space increases. After the contents are filled, the upper surface film 11 and the back film 12 on the opened pouch bag main body 10 are bonded to each other, whereby the contents are sealed in the pouch bag main body 10. Further, the pouch bag 1 filled with the contents can be made independent by the lower edge portions of the front film 11 and the back film 12.

  The front, back and bottom films 11, 12, 13 are each composed of a laminated film having at least a base material layer and a sealant layer. Polyethylene terephthalate, nylon, polypropylene, or the like can be used as a material forming the base layer. As a material for forming the sealant layer, polyethylene, polypropylene, or the like can be used. A printing layer, a support layer, a barrier layer, and the like can be further laminated between the base material layer and the sealant layer, if necessary. Paper or the like can be used for the printing layer. The same plastic or paper as the base layer can be used for the support layer. For the barrier layer, a metal foil such as an aluminum foil, an inorganic substance such as aluminum, an inorganic oxide such as silicon oxide and aluminum oxide, or the like can be used. 2 and 3, the front film 11, the back film 12, and the bottom film 13 are shown as a single layer for simplicity.

  The shape of the pouch bag main body 10 is not limited to a square shape when viewed from the front, but may be a circle, an ellipse, a triangle, or other shapes. In addition, when independence is not required, the form of the pouch bag body 10 may be a three-side seal type, a back seal type, a four-side seal type, or other forms. In the three-side seal type and the back seal type, a bag can be formed by folding a single film. Even when the pouch bag main body 10 is formed by one film, the form of the pouch bag main body 10 is considered to be constituted by both front and back (or front and back) films. be able to. The four-sided seal type can be formed from two films, a front film 11 and a back film 12.

  At the corner between the left side and the upper part when the pouch bag main body 10 is viewed from the front, a spout 20 is formed which is slender and protrudes obliquely upward. The shape and orientation of the spout 20 is formed by, but not limited to, two inward cutouts 21 formed on both sides thereof. The front film 11 and the back film 12 are adhered at the periphery of the spout 20. Inside the spout 20, there is an elongated space (pouring passage) connected to the internal space of the pouch bag main body 10. Instead of the corners of the pouch bag main body 10, the spout 20 may be formed at the center, the side, etc. of the upper part of the pouch bag main body 10. It is also possible to form a plurality of outlets 20.

  A rather wide knob 22 is formed continuously at the tip of the spout 20. Except for a part connected to the spout 20, the knob 22 is composed of front and back films 11 and 12 bonded to each other. A notch 23 is formed at the tip of the spout 20, and a half-cut line portion 24 starting from the notch 23 and not penetrating the front and back films 11 and 12 forms a front and back film at the tip of the spout 20. 11 and 12 are formed. It is preferable that a plurality of half cut line portions 24 are formed. By gripping the knob 22 with a finger and pulling the knob 22 along the half-cut line 24, the notch 22 can be easily torn along the half-cut line 24 with the notch 23 as a trigger. When the knob 22 is torn, the internal space of the pouch bag main body 10 communicates with the outside via the spout passage of the spout 20.

  A pouring auxiliary member 30 is mounted in the pouring port 20.

  The pouring auxiliary member 30 is made of polyethylene, such as low-density polyethylene, medium-density polyethylene, and polypropylene. In particular, it is preferable to use low-density polyethylene, linear low-density polyethylene, or a blend of low-density polyethylene and linear low-density polyethylene. For example, a long spouting auxiliary member is formed by extrusion molding, and cut into a required length, whereby the spouting auxiliary member 30 attached in the spout 20 is made. The spouting assisting member 30 has a mechanical strength such that the spouting assisting member 30 does not collapse (do not deform) when mounted in the spouting portion 20.

  Referring to FIGS. 1, 3 and 4, the auxiliary pouring member 30 includes a mounting surface portion 31 having a rectangular flat plate shape, and a mounting surface portion 31 from each of both lateral ends of the mounting surface portion 31 in the width direction. And two supporting portions 32 protruding in the same direction over the entire length in the longitudinal direction of the camera. The amount of protrusion of the two supports 32 is preferably the same, but slight differences are allowed. Further, although slightly, the two support portions 32 do not protrude in parallel with each other, but are inclined to approach each other. This is because if the two support portions 32 are inclined away from each other, the mounting surface portion 31 is likely to bend in a convex shape in the direction in which the support portions 32 protrude, or the force applied to the surface film 11 is increased, and This is because there is a possibility of causing damage or tearing, and this is to be suppressed. As described above, since the pouring auxiliary member 30 is made by extrusion molding, the mounting surface portion 31 and the two support portions 32 are integrated.

  Flanges 34 slightly projecting laterally are formed on both sides of the mounting surface 31 in the longitudinal direction. The flange portion 34 can prevent the mounting surface portion 31 from being warped convexly in the direction in which the support portion 32 protrudes, and can easily fix the mounting surface portion 31 to the back film 12. However, the flange portion 34 is not always necessary and can be removed.

  The entire edge of the mounting surface portion 31, the support portion 32 and the flange portion 34, that is, the pouring auxiliary member 30, is rounded. That is, the pouring auxiliary member 30 does not have any sharp edges. For example, the top of the support portion 32, the side ends of both ends of the support portion 32, the end of the flange portion 34, and the end of the mounting surface portion 31 Each of them is smoothly curved outward (outward). Therefore, even if any part of the pouring auxiliary member 30 comes into contact with the front and back films 11 and 12, it is possible to prevent the front and back films 11 and 12 from being damaged by the pouring auxiliary member 30.

  A surface (hereinafter, referred to as an outer surface) opposite to a surface (hereinafter, referred to as an inner surface) from which the two support portions 32 protrude, of the mounting surface portion 31 constituting the pouring auxiliary member 30, is connected to the spout port portion 20 (pouch bag main body). By bonding (including welding) to the inner surface of the back film 12 constituting 10), the pouring auxiliary member 30 is attached in the pouring port 20. A part of the outer surface of the mounting surface 31 may be bonded to the inner surface of the back film 12, or the entire outer surface of the mounting surface 31 may be bonded to the inner surface of the back film 12. The outer surface of the mounting surface portion 31 is flat or has a modestly concave shape. That is, it is preferable that the outer surface of the mounting surface portion 31 is not convex outward. This is to make it easy to firmly attach the outer surface of the attachment surface portion 31 to the inner surface of the back film 12. The mounting surface portion 31 having a gentle recess is formed to be slightly thinner at the center in the width direction (see FIG. 3).

  The tip of the pouring auxiliary member 30 (the outwardly facing portion in the state of FIG. 1) is located at a place where the notch 23 is a starting point and does not become an obstacle when the knob 22 is torn. The other end of the spouting assisting member 30 (the inwardly facing gutter in the state of FIG. 1) is located inside the pouch bag main body 10 near the spouting portion 20.

  By bonding the outer surface of the mounting surface portion 31 to the inner surface of the back film 12, the auxiliary pouring member 30 is fixedly disposed inside the spout portion 20, and two support portions 32 projecting from the opposite inner surface are formed. It faces the direction of the surface film 11. The top film of the two support portions 32 projecting from the mounting surface portion 31 supports (lifts) the surface film 11 from the inside thereof, so that the spout portion 20 always keeps the opening state of the spout passage through which the contents pass. You. Referring to FIG. 3, the pouring passage (opening) formed by the front and back films 11 and 12 in the pouring port 20 has a cross section in the width direction of the pouring auxiliary member 30 as a whole. It has an elliptical shape with a longitudinal direction. More specifically, the spouting passage formed in the spouting portion 20 has a relatively wide opening passage 26 having a substantially rectangular cross section sandwiched between the two support portions 32 and the outside of each of the two support portions 32. , Two passages 27A and 27B having a substantially triangular cross section. The contents in the pouch bag main body 10 are discharged through these passages 26, 27A, 27B. Further, since air enters the pouch bag main body 10 through these passages 26, 27A, 27B, the contents in the pouch bag main body 10 can be smoothly taken out.

  Referring to FIG. 4, length L, width (distance between outer surfaces of two support portions 32) W1, thickness T (the thickest portion), and support portion 32 The protrusion amount (height) H1 is determined according to the dimensions of the pouch bag main body 10 and the spout 20. However, when the spout 20 (FIG. 1) is formed to protrude slightly elongated outward from the edge of the pouch bag main body 10, the spouting assisting member 30 has the longest length L (width W1). 2.0 times or more, preferably 4.0 times or more), and the width W1 of the mounting surface 31 is equal to the height H of the pouring auxiliary member 30 (the protrusion amount H1 of the support portion 32 and the thickness T of the mounting surface 31). The shape has a size larger than the sum. Needless to say, the width W1 of the mounting surface 31 is smaller than the width of the spout 20 and the width of the spout passage (the distance between two places where the front film 11 and the back film 12 start to separate in FIG. 3). . The height H of the auxiliary pouring member 30 with respect to the width W1 of the mounting surface 31 is 0.80 times or less, preferably 0.40 times or less. For example, if the width of the spout 20 is about 18 mm, the width W1 of the mounting surface 31 is about 6.0 mm, and the height H of the pouring auxiliary member 30 is 1.0 mm or more and 5.0 mm or less, preferably 2 mm or less. It is not less than 0.5 mm and not more than 3.5 mm.

  Regarding the width W (the distance between the outer surfaces of the two flange portions 34) of the pouring auxiliary member 30, the width of the pouring port 20 and the width of the pouring passage (in FIG. It is needless to say that the distance is smaller than the distance between the two places that start to separate). The width W1 of the mounting surface portion 31 with respect to the width W of the dispensing auxiliary member 30 is preferably 0.6 times or more, and more preferably 0.8 times or more. The width W of the auxiliary ejection member 30 is preferably 10.0 mm or less, and more preferably 7.0 mm or less. By reducing the width W of the auxiliary pouring member 30, the allowable range when attaching the auxiliary pouring member 30 to the back film 12 can be widened, so that the productivity can be increased. In addition, since the distance between the seal part forming the spout 20 and the pouring auxiliary member 30 can be widened, wrinkles may be generated in the spout 20 or air bubbles may be generated in the seal forming the spout 20. Can be suppressed. For example, if the width of the spout 20 is about 18 mm, the width W of the auxiliary pouring member 30 is about 7.0 mm.

  First, the outer surface of the mounting surface portion 31 of the auxiliary pouring member 30 is adhered to a portion of the inner surface of the back film 12 which constitutes the spout portion 20, and then the surface film 11 is covered thereover to seal the periphery. A spout 20 with a dispensing aid 30 is made. As described above, by making the width W1 of the mounting surface portion 31 larger than the height H of the pouring auxiliary member 30, the force applied to the surface film 11 pushed outward by the support portion 32 can be kept small. In addition, the surface film 11 of the spout 20 provided with the spouting assisting member 30 has an arcuate shape that bulges outward (FIG. 3), and the shape protruding outward smoothly along the top is the top of the support part 32. Has. Therefore, the surface film 11 is supported by the wide area of the top of the support portion 32, and a local force is not applied to the surface film 11, and the force applied to the surface film 11 can be dispersed. That is, it is possible to reduce the tensile force and the external force applied to the surface film 11, thereby making it difficult for the surface film 11 to be wrinkled. Further, since the top of the support portion 32 smoothly contacts the inner surface of the surface film 11, the surface film 11 can be prevented from being broken.

1 Pouch bag with spout (packing bag with spout)
10 Pouch bag body (packaging bag body)
11 Surface film
12 Back film
13 Bottom film
20 Outlet
26, 27A, 27B Injection passage
30 Pouring aid
31 Mounting surface
32 Support

Claims (4)

A spouting auxiliary member fixedly used in the spouting passage of a spouting portion provided with an elongated spouting passage communicating with an inner space of the packing bag formed at a part of an edge of the packing bag,
A mounting surface portion to be mounted on the packaging bag, and two support portions protruding in the same direction from both ends in the width direction of the mounting surface portion;
The width of the mounting surface portion is greater than the height of the pouring auxiliary member, which is the thickness of the mounting surface portion plus the amount of protrusion of the support portion;
The tip of the top of the support part that supports the spout passage of the spout of the packaging bag from inside is convexly curved,
Pouring aid. All edges of the support and all edges of the mounting surface are convexly curved,
The pouring assistant according to claim 1. It is formed of a synthetic resin having mechanical strength that does not collapse when fixed in the above-mentioned pouring passage.
The pouring auxiliary member according to claim 1 or 2. A packaging bag body that includes a front film and a back film and forms an internal space between the front film and the back film, and an elongated discharge passage that is formed by the front film and the back film and communicates with the internal space. A pouring port, and a pouring auxiliary member fixed in the pouring passage.
The pouring auxiliary member includes a mounting surface portion and two support portions protruding in the same direction from both lateral ends of the mounting surface portion in the same direction and extending along the longitudinal direction of the pouring passage.
The width of the mounting surface portion is greater than the height of the pouring auxiliary member, which is the thickness of the mounting surface portion plus the amount of protrusion of the support portion;
Top tip of the support portion is curved in a convex shape,
Surface of the support portion opposite to the surface that protrudes above the mounting surface is attached to the back surface film, projects from the mounting surface portion, the two top front end of the support portion for supporting the pouring path of the spout from the inside Is in contact with the inner surface of the surface film,
Packaging bag with spout.

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