JP2009078859A - Packaging bag, packaging bag containing content and manufacturing method of packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag which inhibits an unpleasant feeling to a hand and has improved workability without decreasing tearableness, and the packaging bag containing contents, and a manufacturing method of the packaging bag. <P>SOLUTION: In the packaging bag 10, a main tube 14a and a sub-tube 14b are formed at the side 12 of a tubular film 11 with two or more tubes 14 partitioned by a seal part 13 sealed by heat along the lengthwise direction, and an opening starting section 18 is formed toward the seal part 13 including the side edge 17 of the sub-tube 14b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging bag, a packaging bag containing contents, and a method for manufacturing the packaging bag.

  As a bag-like container for storing liquid or powdered drugs or foods, a three-side sealed packaging bag, a four-side sealed packaging bag, a joint formed by heat-sealing both ends of one film In general, a pillow-type or envelope-type packaging bag provided on the back surface of the bag, a two-side-sealed packaging bag in which an opening of a cylindrical film manufactured by an inflation method is heat-sealed, and the like are used.

By the way, a bag-like container is often provided with an opening start portion such as a notch on one or both of the side portions close to the opening portion so that the opening can be easily performed. In the case of a three-side sealed packaging bag, since both sides are heat-sealed, it is possible to easily provide an opening start portion.
However, the three-side sealed packaging bag increases the rigidity of the heat-sealed joint and becomes sharp, so it may feel uncomfortable when the fingertip touches the joint, and the workability such as carrying and opening is reduced. There was a thing. In some cases, fingers were cut.

  Therefore, a bag that can be easily opened by tearing the bag without causing the fingertip to feel uncomfortable has been proposed. For example, Patent Document 1 discloses a notched packaging bag provided with a pseudo notch formed by heat-sealing a notch formed at a predetermined position in a stage prior to the stage of heat-sealing the periphery.

However, the packaging bag described in Patent Document 1 can suppress fingertip discomfort at the time of opening, but the periphery, particularly both sides, other than the region provided with the pseudo notch is heat-sealed. , Rigidity is increasing.
Thus, for example, when opening a packaging bag containing powdered contents, both sides of the packaging bag should be placed in order to gather the contents downward in the vertical direction in order to prevent the contents from scattering. You may grab it with your hand and make the bottom of the packaging bag collide with an object such as a desk several times. However, both sides with high rigidity hit your hand, which may make you feel uncomfortable and reduce workability. It was easy.
In addition, as a content to be stored in the bag, for example, when storing a powdered drug such as a powder for dialysis for artificial kidney, a large amount of content may be stored, so the thickness of the film forming the bag May be thickened. The thicker the film, the greater the stiffness on both sides of the bag. However, when a packaging bag as described in Patent Document 1 is manufactured, especially when a thick film is used, the hand tends to feel uncomfortable and the workability tends to be lowered.

  Therefore, for example, in Patent Document 2, as shown in FIG. 6, a single laminated film 41 is gusset-folded on the facing surface thereof, and a main body 42 that forms a bag-like container by accommodating an object to be accommodated. A provided pouch container is disclosed. According to the pouch container, when one laminated film 41 is gusseted, a hollow is formed in the corner portion 43 formed on the outer side of the main body 42, and the touch feeling at the corner portion 43 can be softened.

Moreover, as a bag in which both sides are heat-sealed, for example, in Patent Document 3, two non-adhesive films are formed in a position where the seal part is separated from the outer edge of the film and located outside the seal part. An easy-open sealing bag in which a group of scars having a large number of scars is formed on the outer side is disclosed.
JP 2007-1596 A JP 2007-99364 A JP-A-5-178352

However, the pouch container as described in Patent Document 2 is provided with a cap, and when the pouch container is opened, the contents can be taken out by opening the pouch container. Therefore, the pouch container is a container dedicated to a stopper as an opening means, and is not to be opened by tearing using an opening start portion such as a notch. This is because the side portion 44 of the pouch container is gusset-folded as shown in FIG. 6, so that two corner portions 43 are formed on one side portion 44. For example, when an opening start portion such as a notch is provided in one corner portion 43a of the two corner portions 43 and opened, as shown in FIG. Although the film 41b to be formed can be torn in the same direction, the direction of tearing the film 41a and the direction of tearing the film 41b are reversed after passing through the fold part 45 of the gusset, so that it is difficult to tear smoothly and tearability It was easy to fall.
Further, even if the opening start portions are provided at both corner portions 43a and 43b of the two corner portions 43, since the four films are torn up to the gusset folding portion 45, a greater force can be obtained. It was necessary to tear at.
Therefore, in the packaging bag to which the configuration described in Patent Document 2 is applied, it is difficult to provide the opening start portion and open the bag.

In addition, the easy-open sealing bag described in Patent Document 3 is intended to easily tear a sealing bag made of a plastic film from an arbitrary position, but as described above, it is separated from the outer edge of the film. It is presumed that discomfort to the hand can be suppressed by providing the seal portion at the position.
However, there is a need for a packaging bag that can further reduce discomfort to the hand, and it is not always sufficient to suppress discomfort to the hand in the easy-open sealing bag described in Patent Document 3. There wasn't.

By the way, the pillow-shaped or envelope-shaped packaging bag is not provided with the joint portion on the side portion and is provided on the back surface of the bag, and the two-side seal-type packaging bag also does not have the joint portion on the side portion. Compared to 3-port sealed packaging bags and 4-side sealed packaging bags, the packaging bag is not only carried and opened, but also holds both sides of the packaging bag by hand, and the bottom of the packaging bag is a desk, etc. When performing an operation of causing the object to collide several times, it is difficult for the hand to feel uncomfortable.
However, since the pillow-type or envelope-type packaging bag and the two-side seal-type packaging bag are formed in a cylindrical shape, if an opening start portion is provided on the side portion of the packaging bag, the packaging portion is opened in the accommodating portion for accommodating the contents. Since the start portion is provided, the contents leak, and it is difficult to provide the opening start portion on the side portion of the packaging bag.

  The present invention has been made in view of such a situation, and manufacture of a packaging bag, a packaging bag containing contents, and a packaging bag that improve workability by suppressing discomfort to the hand without reducing tearability. The problem is to realize the method.

In the packaging bag of the present invention, a main tube portion and a sub tube portion are formed by a plurality of tube portions, which are partitioned by a fusion portion heat-sealed along the length direction on a side portion of the tubular film. A packaging bag, wherein an opening start portion is provided toward the fusion portion including a side edge portion of the auxiliary cylinder portion.
Here, it is preferable that the opening start part is provided over the fusion part including a side edge part of the sub-cylinder part.

Moreover, it is preferable that the said opening start part is a notch.
Furthermore, even if the thickness of the fused part is 100 to 400 μm, discomfort to the hand can be suppressed and workability can be improved.
In addition, the packaging bag with contents of the present invention is characterized in that powdered contents are accommodated in the packaging bag.

Moreover, the manufacturing method of the packaging bag of this invention is divided into the side part of the cylindrical film by the fused part heat-sealed along the length direction, and the main cylinder part and the sub cylinder part by the some cylinder part And the opening start part is formed toward the fusion part including the side edge part of the sub-cylinder part.
Here, it is preferable that the opening start part is formed to include the side edge part of the sub-cylinder part and the fusion part.

Moreover, it is preferable to form a cylindrical film by the inflation method.
Furthermore, even if a film made by dry lamination and having a thickness of 50 to 200 μm is used, discomfort to the hand can be suppressed, workability can be improved, and functionality such as barrier properties can be imparted.

According to the packaging bag, the content-containing packaging bag, and the packaging bag manufacturing method of the present invention, it is possible to improve workability by suppressing discomfort to the hand without reducing tearability.
Moreover, if it is a packaging bag of this invention, even if it uses a thick film in order to accommodate a lot of contents, the discomfort to a hand can be suppressed and workability | operativity can be improved.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an example of a packaging bag 10 of the present invention.
The packaging bag 10 of this example heat-seals the side part 12 of the cylindrical film 11 along a length direction, forms the melt | fusion part 13 and the some cylinder part 14, and heat-seals the bottom part 15. It is formed in a bag shape.

The cylindrical film 11 used in the present invention is a single layer film or a laminated film in which a plurality of layers are laminated.
The thickness of the tubular film 11 is not particularly limited, and in the present invention, for example, the tubular film 11 having a thickness of 50 to 200 μm can be used.

As a material constituting the inner layer forming the laminated film, that is, the layer located inside the cylindrical film 11 or the single layer film, a sealant film made of polyolefin such as polyethylene or polypropylene is preferable. Among these, polyethylene is preferable in terms of excellent impact strength properties, and specifically, low density polyethylene, medium density polyethylene, high density polyethylene, and linear low density polyethylene are preferable.
As for the thickness of the sealant film which comprises an inner layer, 40-100 micrometers is preferable.

As a material constituting the outer layer forming the laminated film, that is, the layer located on the side in contact with the outside air, for example, a film made of a synthetic resin such as polyester, polyamide, polypropylene, polycarbonate, or polyacetal may be used. it can. The outer layer is usually printed in many cases.
As for the thickness of the film which comprises an outer layer, 15-40 micrometers is preferable.

The laminated film may further be provided with a gas barrier film. By providing the gas barrier film, it is possible to obtain a packaging bag suitable for containing a drug that is easily altered by oxygen or the like.
Examples of the gas barrier film include a film made of polyester or polyamide, a film obtained by vapor-depositing silica, aluminum, alumina, etc., an aluminum foil, a film made of polyvinyl alcohol, a film made of an ethylene / vinyl alcohol copolymer, a polychlorinated film. Examples include films made of vinylidene.
The thickness of the gas barrier film is preferably 7 to 40 μm.

Here, the structure of the packaging bag 10 is explained in full detail, explaining the manufacturing method of the packaging bag of this invention.
First, the tubular film 11 is formed by using an inflation method or a joint formed by heat-sealing a single film so that both ends of the film overlap each other as the back surface of the cylinder. When the cylindrical film 11 is formed by the inflation method, the cylindrical film 11 may be a single layer film or a laminated film, but considering the ease of forming, the single layer film It is preferable that However, when giving strength to the packaging bag or containing anaerobic contents, a cylindrical film is formed by the multilayer inflation method, or the cylindrical film obtained by the inflation method is crushed, It is preferable to obtain the above-described laminated film by laminating other layers by dry lamination or the like after making it flat.
On the other hand, when heat-sealing a single film so that both ends of the film overlap, a single-layer film or a laminated film may be used, but the packaging bag is given strength or anaerobic content. When accommodating a thing, it is preferable to use the laminated | multilayer film produced by the dry lamination.

Then, as shown in FIG. 1, the side portion 12 of the cylindrical film 11 is heat-sealed along the length direction to form the fused portion 13 and the plurality of cylindrical portions 14. The plurality of tube portions 14 are partitioned by the fusion portion 13, and the plurality of tube portions 14 form a main tube portion 14 a and a sub tube portion 14 b. The main cylinder part 14a is located inside the fusion part 13, that is, the center part of the tubular film 11, and the sub cylinder part 14b is located outside the fusion part 13, that is, the side part of the tubular film 11. . Moreover, the main cylinder part 14a is used as an accommodating part for accommodating contents.
The cylindrical film 11 shown in FIG. 1 is formed by an inflation method.

At this time, as shown in FIG. 2, the width d1 of the fused part 13 is 3 to 15 mm, and the length d2 when the sub-cylinder part 14b is crushed and flattened is 2 to 10 mm. It is preferable to heat-seal the side part 12 of the cylindrical film 11, more preferably, the width d1 of the fused part 13 is 5 to 10 mm, and the length d2 of the auxiliary cylinder part 14b is 3 to 3. 8 mm.
If the width d1 of the fused part 13 is 3 mm or more, even if a part of the fused part 13 may be peeled off for some reason, the films should be adhered to each other part. Therefore, the main cylinder portion 14a, that is, the accommodating portion can be held. On the other hand, if the width d1 of the fused part 13 is 15 mm or less, the main cylinder part 14a having a sufficient capacity can be secured.
Moreover, if the length d2 of the sub cylinder part 14b is 2 mm or more, when the side part 12 is grasped with a hand, a fingertip also becomes difficult to touch the fusion | fusion part 13, and the discomfort to a hand can be suppressed more. On the other hand, if the length d2 of the sub-cylinder part 14b is 10 mm or less, since the ratio of the film which is not concerned with accommodation of the contents can be reduced, cost can be reduced.

In the present invention, when the side portion 12 of the tubular film 11 is heat-sealed, as shown in FIG. 1, heat is applied to the side portions 12 on both sides of the tubular film 11 along the length direction. It may be sealed to form the fused portion 13 and the plurality of cylindrical portions 14, or only one side portion 12 may be heat sealed as shown in FIG. In the case of the former packaging bag 10, two sub-cylinder parts 14 b are formed on both sides of the main cylinder part 14 a via the fusion part 13 with respect to one main cylinder part 14 a. On the other hand, in the case of the latter packaging bag 20, one sub-cylinder part 14b is formed on one side of the main cylinder part 14a via the fusion part 13 with respect to one main cylinder part 14a.
However, in the case of the packaging bag 10 as shown in FIG. 1, it is possible to provide an opening start portion 18 to be described later on both sub-cylinder portions 14 b, so that the opening from one opening start portion is performed smoothly. Even if it is not a case, since it can be opened from the opposite side, it is preferable to have two sub cylinder parts 14b.

As described above, by heat-sealing the side portion 12 of the tubular film 11 along the length direction, the rigidity of the fused portion 13 is increased. However, the cylindrical portion 14 is not heat-sealed, so that the rigidity may be increased. It becomes harder to be sharp and less likely to feel uncomfortable even when touched by the hand.
Therefore, for example, when opening a packaging bag containing powdered contents, that is, a packaging bag containing contents, grasp both sides of the packaging bag by hand and use the bottom of the packaging bag as an object such as a desk. Even when the operation of causing the collision several times is performed, the hand directly touches the cylindrical portion 14 such as the sub-cylindrical portion 14b and the main cylindrical portion 14a which are less rigid than the fused portion 13, so that the hand is uncomfortable. It becomes difficult to feel.

About the bottom part, the bottom part 15 is heat-sealed and the cylinder part 14 is formed in a bag shape. When the bottom 15 is heat-sealed, it may be heat-sealed from the bottom 15 ′ of the bottom 15 or may be heat-sealed inside the bottom 15 ′, but considering the volume of the main cylinder 14a, FIG. As shown, it is preferable to heat seal from the bottom 15 ′ to form the bottom fused portion 16.
Further, only the bottom portion corresponding to the main tube portion 14a may be heat sealed, or the bottom portion corresponding to both the main tube portion 14a and the sub tube portion 14b may be heat sealed. As shown, it is preferable that only the bottom portion corresponding to the main tube portion 14a is heat-sealed to form the bottom fused portion 16. Thereby, since the bottom part of the sub cylinder part 14b is not heat-sealed, even if all the peripheral surfaces of the sub cylinder part 14b maintain a cylindrical shape and a hand touches the bottom part of the sub cylinder part 14b, it becomes difficult to feel uncomfortable. .

As shown in FIG. 1, an opening start portion 18 is formed on the side portion 12, including the side edge portion 17 of the auxiliary cylinder portion 14 b toward the fusion portion 13. As shown in FIG. 1, in the case of the packaging bag 10 provided with two sub-cylinder parts 14b with respect to one main cylinder part 14a, if the opening start part 18 is provided in at least one sub-cylinder part 14b '. The number of opening start portions 18 provided in one sub-cylinder portion 14b ′ is preferably 1 to 2. When two opening start portions 18 are provided, they may be provided on the upper and lower end sides of the sub-cylinder portion 14b ′, that is, on the mouth portion 19 side and the bottom portion 15 side facing the bottom portion 15, respectively. And the bottom 15 can be opened. Further, as described above, if the opening start portion 18 is provided in the two sub-cylinder portions 14b, even if the opening from one opening start portion is not smoothly performed, the opening can be performed from the opposite side. it can.
By providing the opening start portion 18 in this way, the packaging bag 10 can be torn in the width direction using the opening start portion 18 as an opening base point.
In the present invention, the “side edge portion of the sub-cylinder portion” refers to a portion that is the farthest from the boundary 13 a between the sub-cylinder portion 14 b and the fused portion 13 on the peripheral surface of the sub-cylinder portion 14 b.

In the present invention, as described above, the side portion of the tubular film 11 is heat-sealed along the length direction to form the fused portion 13 and the plurality of tubular portions 14. Even if the opening start portion 18 is formed toward the fusion portion 13 including the side edge portion 17 of the auxiliary cylinder portion 14b, the opening start portion 18 is provided in the main cylinder portion 14a, that is, the accommodating portion. Because there is no, there is no risk of the contents contained in the packaging bag leaking.
As described above, according to the present invention, even in a pillow-type or envelope-type packaging bag and a bag that does not have a joint portion on the side portion, such as a two-side seal-type packaging bag, an opening start portion on the side portion. Can be provided. Therefore, using these packaging bags, it is possible to obtain a packaging bag that can be easily opened while suppressing discomfort to the hand.

  Further, in the present invention, the unsealing start part 18 is provided toward the fusion part 13 including the side edge part 17 of the sub cylinder part 14b. That is, as shown in FIG. 2, the unsealing start portion 18 has an auxiliary cylinder whose starting point 18 a does not exceed the side edge 17 of the auxiliary cylinder part 14 b and whose end point 18 b does not exceed the boundary 13 a between the auxiliary cylinder part 14 b and the fusion part 13. It is provided so as to be located in the portion 14b.

  Examples of the opening start portion 18 include a notch, a partial scar, a minute semi-through hole, a weakening line, and the like, but a notch is preferable. The shape of the notch is not particularly limited, and for example, a pentagon type as shown in FIGS. 1 and 2, an I type as shown in FIG. 3A, a V shape as shown in FIG. 3B, FIG. Examples include a U-shape as shown in (c) and a semicircular shape as shown in FIG. In addition, a fine half through-hole means the state shown below. When the sub-cylinder part is crushed and flattened by randomly drilling fine through-holes at locations where the side opening start part 18 is provided, the fine through-holes are unlikely to overlap each other, and as a whole film Is more likely to be in a half-penetrated state than in a penetrated state. It also includes the case of random drilling to the extent that it does not penetrate. Examples of the method of forming the semi-through hole include a method of performing a semi-penetration process by irradiating a predetermined position on the film with a laser beam or physically scratching with a sandpaper.

  The method for forming the opening start portion 18 is not particularly limited. For example, in the case of a notch, a method of forming a desired shape using a razor or the like before or after the formation of the fused portion 13 is given. It is done.

  Further, the opening start portion 18 may be set at a position where tearing is desired to be started. For example, as shown in FIG. 2, from the mouth side 19 ′ of the mouth portion 19, or the bottom of the bottom portion to the center of the opening start portion 18. It is preferable to provide at a position where the distance d3 is 10 to 40 mm. If the distance d3 is 10 mm or more, after filling the contents, the mouth 19 is sealed by heat sealing, and then the sub-cylinder part 14b is picked with the fingertips of both hands, and the hands are moved in opposite directions to each other. When tearing, the picking allowance is sufficiently large, so that it is easy to tear. On the other hand, if the distance d3 is 40 mm or less, the contents can be prevented from scattering when the packaging bag is torn. When the distance d3 is less than 10 mm, the mouth 19 of the packaging bag may not be fully opened when the tear trajectory when the packaging bag is torn.

  Moreover, as for the opening start part 18, the starting point 18a is located in the side edge part 17 of the sub cylinder part 14b as mentioned above. On the other hand, the end point 18b of the opening start portion 18 is preferably positioned such that the distance d4 from the start point 18a to the end point 18b is, for example, 1 mm or more. If the distance d4 is 1 mm or more, since the length of the opening start portion 18 provided in the sub-cylinder portion 14b is sufficient, the packaging bag 10 can be easily torn.

  Moreover, in this invention, as shown in FIG. 4, you may form the opening start part 18 over the melt | fusion part 13 including the side edge part 17 of the sub cylinder part 14b. That is, as shown in FIG. 4, the unsealing start portion 18 extends from the entire region in the width direction of the sub-cylinder portion 14 b, that is, from the side edge 17 of the sub-cylinder portion 14 b to the boundary between the sub-cylinder portion 14 b and the fused portion 13. It may be provided up to 13a and a part of the region in the width direction of the fused portion 13, that is, from the boundary 13a to a range not exceeding the region of the fused portion 13. Thereby, since a part of the opening start part 18 is also formed in the fusion part 13, it is possible to suppress an increase in the tear strength at the boundary 13a, so that the packaging bag can be smoothly torn with a constant force. Can do.

  As described above, when the opening start portion 18 is formed over the fusion portion 13 including the side edge portion 17 of the sub cylinder portion 14b, the end point 18b of the opening start portion 18 has a distance d5 from the boundary 13a to the end point 18b. It is preferable that the position is 3 mm or less, and more preferably 2 to 3 mm. If the distance d5 is 2 mm or more, the fused part 13 can be torn with a more constant force. On the other hand, if the distance d5 is 3 mm or less, external stress may be applied to the side portion of the packaging bag, particularly the opening start portion, for tearing the packaging bag when filling or transporting the contents. Also, the tear can be retained in the fused portion 13.

In the present invention, even when the opening start portion 18 is formed so that the shape of the opening start portion 18 is a fine semi-through hole or weakening line, the packaging bag can be easily formed from the side edge portion 17 of the sub cylinder portion 14b. Therefore, it is considered that the starting point 18a of the opening start portion 18 is substantially located at the side edge portion 17 of the sub cylinder portion 14b.
Further, when the opening start part 18 is formed over the fusion part 13 including the side edge part 17 of the sub-cylinder part 14b, the end point 18b of the opening start part 18 is located at the fusion part 13, and the fusion part It is not located to the main cylinder part 14a exceeding 13.

  In the present invention, the method for sealing the mouth portion 19 of the packaging bag 10 is not particularly limited. For example, the mouth portion 19 may be sealed by heat sealing after filling the contents.

Moreover, it does not restrict | limit especially about the content accommodated in the main cylinder part 14a of the packaging bag 10 of this invention, A chemical | medical agent, a foodstuff, etc. can be accommodated. Further, the shape of these contents may be liquid or powder and is not particularly limited. In particular, when the contents are in powder form, in order to prevent the contents from being scattered, in order to gather the contents downward in the vertical direction, grasp both sides of the packaging bag by hand and remove the bottom of the packaging bag. Since there are many opportunities to perform an operation of colliding with an object such as a desk several times, the effects of the present invention are easily exhibited. Therefore, the flat bag of the present invention is particularly suitable for containing powdered contents.
Among these, it is particularly suitable for containing a powdered drug such as a powder for dialysis for artificial kidney.

  When a powdered drug is stored, a large amount of drug is often stored, and the thickness of the film may be increased in consideration of the durability of the bag. In the conventional bag-like container, since both sides where the opening start portion is provided are heat-sealed and fused from the outer edge, the thickness of this side becomes twice the thickness of the film. Therefore, as the thickness of the film increases, the rigidity of the side portion increases and becomes sharper, and when the hand touches the side portion, it becomes easy to feel uncomfortable.

  However, according to the present invention, the side of the cylindrical film is heat-sealed along the length direction to form the fused portion and the plurality of cylindrical portions, so the cylindrical portion is heat-sealed. There is no risk of increased rigidity. Therefore, since the tube portion is less likely to be sharp, it becomes difficult to feel uncomfortable even if the hand touches the tube portion. In particular, even when a film having a thickness of 50 μm or more is used and the thickness of the fused part is 100 μm or more, the structure of the present invention is less likely to feel uncomfortable even if the tube part is touched. In addition, cutting of fingers can be suppressed. Therefore, for example, even when a large amount of medicine of about 3 kg is accommodated, discomfort to the hand can be suppressed and workability can be improved while maintaining the durability of the bag.

  As described above, a cylinder formed outside the fusion part by heat-sealing along the length direction on the side part of the tubular film to form a fusion part and a plurality of cylinder parts It is possible to suppress an increase in the rigidity of the portion. This part is less likely to be sharp and less likely to feel uncomfortable even when touched by a hand. Therefore, in particular, in the case of a packaging bag containing the contents using the packaging bag of the present invention, the both sides of the packaging bag containing the contents are grasped by hand when opening the packaging bag. Even when an operation of causing the bottom of the bag to collide with an object such as a desk several times is performed, discomfort to the hand can be suppressed, so that workability can be improved.

  Further, according to the packaging bag of the present invention, since the opening start portion can be provided on the side portion of the packaging bag while suppressing discomfort to the hand, the packaging bag can be easily opened. Moreover, since the opening start part is provided toward the fusion | fusion part including the side edge part of a subcylinder part, what is necessary is just to use the force only to tear the film for 2 sheets, when opening a packaging bag. Furthermore, if the opening start part is provided over the fusion part including the side edge part of the sub-cylinder part, the fusion part can be torn more smoothly with a constant force.

  Therefore, according to this invention, the packaging bag which suppresses discomfort to a hand and improves workability | operativity is obtained, without reducing tearability.

It is a perspective view which shows an example of the packaging bag of this invention. It is the elements on larger scale which show an example of an opening start part. It is the elements on larger scale which show the other example of an opening start part. It is the elements on larger scale which show the other example of the side part of a packaging bag. It is a perspective view which shows the other example of a packaging bag. It is sectional drawing which shows the conventional pouch container.

Explanation of symbols

10: packaging bag, 20: packaging bag, 11: cylindrical film, 12: side part, 13: fusion part, 14: cylinder part, 14a: main cylinder part, 14b: sub cylinder part, 17: side edge part 18: Opening start part.

Claims (9)

A packaging bag in which a main cylinder part and a sub-cylinder part are formed by a plurality of cylinder parts, which are partitioned by a fusion part heat-sealed along a length direction on a side part of a cylindrical film,
A packaging bag, wherein an opening start part is provided toward the fusion part including a side edge part of the sub-cylinder part.   The packaging bag according to claim 1, wherein the opening start portion is provided over the fusion portion including a side edge portion of the sub cylinder portion.   The packaging bag according to claim 1, wherein the opening start portion is a notch.   The packaging bag according to any one of claims 1 to 3, wherein the fusion part has a thickness of 100 to 400 µm.   A packaging bag containing contents, wherein the packaging bag according to any one of claims 1 to 4 contains powdered contents. Formed on the side of the cylindrical film by a plurality of cylindrical parts, which are partitioned by a fusion part heat-sealed along the length direction,
A method for manufacturing a packaging bag, wherein an opening start part is formed toward a fusion part including a side edge part of the sub-cylinder part.   The method for manufacturing a packaging bag according to claim 6, wherein the opening start part is formed to include the side edge part of the sub-cylinder part and to the fusion part.   The method for producing a packaging bag according to claim 6 or 7, wherein a tubular film is formed by an inflation method.   The method for producing a packaging bag according to claim 6 or 7, wherein a film produced by dry lamination and having a thickness of 50 to 200 µm is used.

Images