JP2009073504A - Packaging bag, packaging bag withe content, and method for manufacturing packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a packaging bag capable of suppressing unpleasant feeling to hands and improving operability without decreasing tearing properties, the packaging bag with a content, and a method for manufacturing the packaging bag. <P>SOLUTION: The packaging bag 10 has a bottom 12, an opening 19 opposing the bottom 12, and two opposing side ends, and at least one side end 13a of two opposing side ends 13 is heat-sealed inside the outer edge 17a of the side end 13a, and the packaging bag 10 has a welding part 16 and a non-welding part formed outside the welding part 16. The non-welding part 17 is wound outward or inward, and an unsealing starting part 15 is formed from the outer edge 17a toward the welding part 16. <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 with two films stacked and heat-sealed on the bottom and both side edges, one sheet A pillow-shaped or envelope-shaped packaging bag having a joint formed by heat-sealing both ends of the film on the back surface of the bag is generally used.

The three-side sealed packaging bag is sharper because the heat-sealed joint becomes more rigid and may feel uncomfortable if the fingertip touches the joint, which may reduce workability such as carrying and opening. there were. In some cases, fingers were cut.
On the other hand, since pillow-shaped or envelope-shaped packaging bags are provided with a joint on the back of the bag, fingertips and the like are less likely to feel uncomfortable during operations such as carrying and opening compared to three-side sealed packaging bags. In particular, since both side end portions are formed in a cylindrical shape, it is rare that a fingertip or the like feels uncomfortable during work.

By the way, a bag-like container is often provided with an opening start portion such as a notch at one or both of the side end 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 side end portions are heat-sealed, an opening start portion can be easily provided. However, since the pillow-shaped or envelope-shaped packaging bag has both side end portions formed in a cylindrical shape, it is difficult to provide an opening start portion.
As described above, it is difficult to provide both an opening start portion as a means for facilitating opening and improving workability such as opening without feeling uncomfortable with the fingertips.

  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, in the packaging bag described in Patent Document 1, the discomfort of the fingertip at the time of opening can be suppressed, but the periphery, particularly both side end portions other than the region provided with the pseudo notch is heat-sealed. So the rigidity has increased.
Thus, for example, when opening a packaging bag containing powdered contents, both side edges of the packaging bag are used to gather the contents downward in the vertical direction in order to prevent the contents from scattering. Although the operation may be performed by causing the bottom of the packaging bag to collide with an object such as a desk several times by hand, it may feel uncomfortable because both rigid side edges hit the hand. It was easy to fall.
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 of both side edges 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. 9, a single laminated film 41 is gusset-folded on the facing surface thereof, and a main body 42 constituting 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.

Further, as a bag whose side end portion is heat-sealed, for example, in Patent Document 3, a seal portion is formed at a position away from the outer edge of the film, and two non-adhesive film outsides positioned outside the seal portion are used. An easy-open sealing bag in which a scar group having a large number of scars is formed on the 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 end 44 of the pouch container is gusset-folded as shown in FIG. 9, so that two corners 43 are formed at one side end 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. Can be torn in the same direction, but when the gusset fold 45 is passed, the direction of tearing the film 41a and the direction of tearing the film 41b are reversed, making it difficult to tear smoothly. Sex 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.

  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.

The packaging bag of the present invention includes a bottom portion, a mouth portion facing the bottom portion, and two opposite side end portions, and at least one side end portion of the facing two side end portions is the side end portion. A packaging bag that is heat-sealed inside the outer edge of the part and has a fused part and a non-fused part formed on the outside of the fused part, wherein the non-fused part is wound externally or internally. And an opening start portion is provided from the outer edge toward the fused portion.
Here, it is preferable that the opening start part is provided from the outer edge to the fusion part.

Further, both side end portions of the two films are heat-sealed to form a bag shape, and both the side end portions are heat-sealed inside each outer edge, and the fused portion and the outside of the fused portion It is preferable that the non-fused portion is wound around the outer winding or the inner winding.
Furthermore, it is preferable that the opening start part is a notch.
Moreover, 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.
Furthermore, the packaging bag with contents according to 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 WHEREIN: In the manufacturing method of the packaging bag provided with the bottom part, the opening | mouth part which opposes this bottom part, and two side edge parts which oppose, Of the two said side edge parts which oppose And heat-sealing at least one side end portion to the inner side of the outer edge of the side end portion to form a non-fused portion on the outer side of the fused portion and the fused portion, and winding the non-fused portion outwardly. Alternatively, the opening start portion is formed from the outer edge toward the fused portion by inner winding.
Here, it is preferable that the opening start part is formed from the outer edge to the fusion part.

In addition, both side end portions of the two films are heat sealed to form a bag shape, and both the side end portions are heat sealed to the inner side from each outer edge, so that the fusion portion and the fusion portion It is preferable that a non-fused portion is formed on the outside and the non-fused portion is externally wound or internally wound.
Furthermore, even if a film having a thickness of 50 to 200 μm is used, discomfort to the hand can be suppressed and workability can be improved.

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, since an outer edge becomes difficult to touch a hand, it is excellent in suppression of the discomfort to a hand.
Furthermore, with the packaging bag of the present invention, even if a thick film is used to accommodate a large amount of contents, discomfort to the hand can be suppressed and workability can be improved.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing an example of the packaging bag 10 of the present invention.
The packaging bag 10 of this example has two films 11, a bottom portion 12, and at least one side end portion 13 a of two opposing side end portions 13 inside the outer edge 17 a of the side end portion 13 a. While forming the accommodating part 14 by heat sealing, it is formed in a bag shape.

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

As a material constituting the outer layer, that is, a 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 can be used. 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.

On the other hand, as the material constituting the inner layer, that is, the layer located on the side in contact with the contents in the accommodating portion 14, for example, 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.

Further, a gas barrier film may be further provided between the outer layer and the inner layer. 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, two films 11 are overlapped, and as shown in FIG. 1, at least one side end portion 13a out of two opposing side end portions 13 is heat-sealed inside the outer edge 17a of the side end portion 13a. Thus, the fused portion 16 is formed. By forming the fusion part 16 in this way, the side end part 13 a has the fusion part 16 and a non-fusion part 17 formed outside the fusion part 16.
In addition, although mentioned later in detail, the non-fusion | fusion part 17 is processed so that it may become an inner winding in FIG.1, FIG.4,6.

At this time, as shown in FIG. 2, one side end portion is set so that the width d1 of the fused portion 16 is 3 to 15 mm and the width d2 of the non-fused portion 17 is 2 to 10 mm. It is preferable to heat-seal 13a to the inner side of the outer edge 17a of the side end portion 13a. More preferably, the width d1 of the fused portion 16 is 5 to 10 mm, and the width d2 of the non-fused portion 17 is 4 to 8 mm. It is. FIG. 2 is an example of a packaging bag when the non-fused portion 17 that has been wound into an inner winding or an outer winding is stretched flat.
If the width d1 of the fusion part 16 is 3 mm or more, even if a part of the fusion part 16 may be peeled off for some reason, the two films are adhered to the other part. Therefore, the accommodating portion 14 can be held. On the other hand, if the width d1 of the fusion part 16 is 15 mm or less, the accommodating part 14 having a sufficient capacity can be secured.
Further, if the width d2 of the non-fused portion 17 is 2 mm or more, the fingertips are less likely to touch the fused portion 16 when the side end portion 13 is gripped by hand, so that discomfort to the hand can be further suppressed. . On the other hand, if the width d2 of the non-fused portion 17 is 10 mm or less, the proportion of the film that is not involved in the accommodation of the contents can be reduced, thereby reducing the cost.

The non-fused portion 17 is wound so as to have an outer winding as shown in FIG. 3A or an inner winding as shown in FIG. Examples of the winding method include a method of adjusting the difference in tension between the films constituting the inner layer and the outer layer when the film 11 forming the packaging bag is produced by laminating. Specifically, the tension of the inner layer film constituting the inner layer is adjusted to be larger than the tension of the outer layer film constituting the outer layer to produce a film 11, and two films 11 are prepared. When they are stacked so as to contact each other and heat-sealed as described above, the inner winding non-fused portion 17 is formed. On the contrary, if the tension of the inner layer film is adjusted to be smaller than the tension of the outer layer film, the outer winding non-fused portion 17 is formed.
In addition, the tension | tensile_strength of an inner layer film or an outer layer film can be adjusted with the strength of the brake added to the feeding roll of each film, for example. Normally, the film tension tends to increase as the braking force increases, while the film tension tends to decrease as the braking force decreases. The tension can be adjusted.

In addition, the winding method is not limited to the above-described method. For example, the bottom 12 and the opening start portion 15 are formed by a method as described later, and then a bag is manufactured, and then a wound iron such as a heated iron is used. By making the means come into contact with the non-fused portion 17 so as to be externally wound or internally wound, or by blowing hot air to the non-fused portion 17 to shrink the inner layer, the non-fused portion 17 is wound externally or It may be processed into an inner roll.
The winding condition of the non-fused portion 17 is not particularly limited, but may be adjusted by adjusting the degree of tension difference between the inner layer film and the outer layer film, the diameter of the curl means, and the hot air blowing condition. Can be adjusted to the degree of winding.

  As shown in FIG. 3C, the winding condition is 5 mm away along the film from the boundary 16a between the fused portion 16 and the non-fused portion 17 toward the outer edge 17a as shown in FIG. When the length d3 along the film, i.e., the length d3 along the film is 5 mm, the winding condition is preferably such that the distance d4 from the point 17 ′ to the extension line of the fused portion 16 and the boundary 16a is 2 mm or more. However, it is assumed that the length from the boundary 16a to the folding point 17 '' where the non-fused portion 17 is folded is 5 mm or more. When the width d2 of the non-fused portion 17 shown in FIG. 2 is less than 5 mm, for example, the distance from the turning point 17 ″ to the extension line of the fused portion 16 and the boundary 16a is measured, and the turning point from the boundary 16a is measured. What is necessary is just to obtain | require by calculating proportionally the distance from the folding | turning point 17 '' measured previously when the length to 17 '' is converted into 5 mm.

  On the other hand, as shown in FIG. 3 (d), as the winding condition in the case of processing into an inner winding, one non-fused portion is cut off at the boundary 16 a and the remaining non-fused portion 17 The distance from the point 17 ′ to the extension line of the fusion part 16 and the boundary 16a when the distance d3 along the film is 5 mm away from 16a toward the outer edge 17a, that is, when the length d3 along the film is 5 mm. A winding condition such that d4 is 2 mm or more is preferable. However, it is assumed that the length from the boundary 16a to the folding point 17 '' where the non-fused portion 17 is folded is 5 mm or more. In addition, when the width d2 of the non-fused portion 17 shown in FIG. 2 is less than 5 mm, for example, as in the case of external winding, when the length from the boundary 16a to the turning point 17 ″ is converted to 5 mm, What is necessary is just to obtain | require by calculating proportionally the distance from the folding | turning point 17 '' to the extension part of the melt | fusion part 16 and the boundary 16a.

  In addition, when manufacturing a packaging bag using two films as above-mentioned, as shown in FIG. 1, the other side edge part 13b is also heat-sealed inside the outer edge 17a of this side edge part 13b. Thus, it is preferable to form the non-fused portion 17 on the outer side of the fused portion 16 and the fused portion 16 and wind the non-fused portion 17 into an outer winding or an inner winding.

As described above, heat sealing is performed on the inner side of the outer edge 17a of the side end portion 13 to increase the rigidity of the fused portion 16. However, since the non-fused portion 17 is not heat sealed, there is no risk of increasing the rigidity. It becomes difficult to feel uncomfortable even if a hand touches it. Further, by performing the winding process on the non-fused portion 17, the outer edge 17a is less likely to be directly touched by the hand, so that it is less likely to feel uncomfortable.
Therefore, for example, when opening a packaging bag containing powdered contents, that is, a packaging bag containing the contents, both sides of the packaging bag are grasped by hand, and the bottom of the packaging bag is an object such as a desk. Even when a collision operation is performed such that the user is caused to collide several times, discomfort to the hand can be suppressed, so that workability can be improved.

  In the case of manufacturing a packaging bag using two films, only one side end portion 13a was heat-sealed from the outer edge 17a, and the other side end portion 13b was heat-sealed from the outer edge 17a. Even if it is a packaging bag, if one side end 13a is gripped with one hand and the other side end 13b is shifted with the other hand outward and only the fingertips are gripped, there will be discomfort to the hand. Can be suppressed. In addition, even a packaging bag containing a large amount of content can be supported by one hand, so if the center of gravity of the content is tilted to the other hand, the other hand Even if it is attached to the packaging bag, the collision operation can be performed stably.

  By the way, in the case of a packaging bag in which both side edges are heat-sealed from the outer edge, as in the past, in order to carry out a collision operation while suppressing discomfort to the hand It is necessary to grasp both side edges only with the fingertips of both hands. However, even if the packaging bag containing the contents containing a large amount of contents is gripped in this way, it is difficult to stably grip the packaging bag, so that it is difficult to perform the collision operation smoothly.

  However, according to the present invention, as described above, since at least one of the side end portions 13a is heat-sealed inside the outer edge 17a of the side end portion 13a, a large amount of contents are accommodated. Even if it exists, since the operation of a collision can be performed smoothly while suppressing discomfort to the hand, workability can be improved. In particular, when a packaging bag is manufactured using two films, if the other side end portion 13b is heat-sealed to the inner side of the outer edge 17a of the side end portion 13b, the collision operation is more stable. Since both side end portions 13 can be grasped, discomfort to the hand can be further suppressed.

  In addition, although the non-fusion | fusion part 17 of the example shown in FIG. 1 is comprised from two films, it is not necessary to wind each film in the same direction, one film is wound outside and the other film is wound inside. You may wind so that it may become. However, if both the films are wound inwardly, the outer edge 17a is positioned on the inner side, that is, between the two films, so that discomfort to the hand can be further suppressed, which is preferable.

  About the bottom part, the bottom part 12 is heat-sealed and the accommodating part 14 is formed. When the bottom 12 is heat-sealed, it may be heat-sealed from the bottom 12 ′ of the bottom 12 or may be heat-sealed inside the bottom 12 ′. Thus, it is preferable to heat seal from the bottom side 12 ′ to form the bottom fused portion 18. As shown in FIG. 1, the bottom portion 12 is preferably provided up to a portion that intersects the fusion portion 16, but may be provided so as to extend over the entire width direction of the packaging bag 10.

As shown in FIG. 1, an opening start portion 15 is formed on the side end portion 13 from the outer edge 17 a toward the fusion portion 16. The opening start part 15 should just be provided at least in the one side edge part 13a, and as a number of the opening start parts 15 provided in the one side edge part 13a, 1-2 pieces are preferable. When two opening start portions 15 are provided, they may be provided on the upper and lower ends of the side end portion 13, that is, on the mouth portion 19 side and the bottom portion 12 side facing the bottom portion 12. It can be opened from any of the bottom portions 12.
By providing the opening start portion 15 in this way, the packaging bag 10 can be torn in the width direction using the opening start portion 15 as an opening base point.

  In the present invention, the opening start portion 15 is provided from the outer edge 17 a toward the fusion portion 16. That is, as shown in FIG. 2, the opening start portion 15 is located in the non-fused portion 17 where the starting point 15a is at the outer edge 17a and the end point 15b is not beyond the boundary 16a between the fused portion 16 and the non-fused portion 17. It is provided to do. Therefore, when opening the packaging bag 10, it is sufficient to use a force that only tears two films, and a force greater than this, for example, a force that tears four films, is not necessary. Can be suppressed.

  Examples of the opening start portion 15 include notches, partial scars, fine half-through holes, weakening lines, and the like, but notches are preferable. The shape of the notch is not particularly limited, and for example, a pentagon type as shown in FIGS. 1 to 3, an I type as shown in FIG. 4A, a V shape as shown in FIG. 4B, 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. The fine film formed in each film even when the two films are stacked by randomly drilling fine through holes at the locations where the opening start portions 15 of the two films forming the packaging bag 10 are provided. Since the through-holes are difficult to overlap each other, the entire film is more likely to be in a semi-penetrated state than the state in which the upper and lower films are penetrated. Also, instead of a film with a perforated hole, use two films perforated so that they do not penetrate at random or the same position, or a film that is perforated so as not to penetrate, and a film that is not perforated This includes the case of using. As a method of forming a semi-through hole, a method of performing a semi-penetration process by irradiating a predetermined position on the film with a laser beam or physically scratching it with a sandpaper or the like, and a film having a through-hole perforated 2 Examples of the method include a method in which the inner layers made of polyethylene or the like are melted to form a semi-penetrating state by stacking and heat sealing.

The method of forming the opening start portion 15 is not particularly limited, and for example, in the case of a notch, a method of forming it in a desired shape using a razor or the like can be mentioned. Moreover, you may form the opening start part 15 by the method as shown below.
First, as shown in FIG. 5, a film original film obtained by stacking two films so that inner layers are in contact with each other is heat-sealed at a predetermined position to form a fusion part 16 and a bottom fusion part 18. A linked packaging bag in which the packaging bags are connected is produced. Next, for example, a hexagon-shaped through hole 15 ′ is drilled so that the center thereof is located between the two packaging bags and the hexagon-shaped through hole 15 ′ is formed in the non-fused portion 17. . Next, by cutting along a cutting line X that passes through the center of the through-hole 15 ′ and is parallel to the fusion part 16, a packaging bag having a pentagon-type opening start part 15 is obtained. In this case, an opening start part will be provided in both of two side edge parts.

  When the opening start portion 15 is formed by such a method, the connected packaging bag is usually cut so as to pass through the center of the through hole 15 ′, but the cutting line X is shifted from the center of the through hole 15 ′ for some reason. Therefore, the cutting line X may not pass through the center of the through hole 15 ′. For example, in order to form a V-shaped opening start portion, a diamond-shaped through hole 15 ′ may be drilled. However, when the cutting line X deviates from the center of the through hole 15 ′, one opening start portion is V Although it becomes a letter shape, the other opening start part becomes a Pentagon type, and it becomes difficult to obtain a packaging bag having an opening start part of the same shape. However, if the through-hole 15 'is drilled in a hexagon shape in advance, even if the cutting line X is slightly shifted, both of the opening start portions to be formed will be a pentagon type. The same applies to the case of the I type, and if the through hole 15 ′ is drilled in the I shape, both of the opening start portions to be formed become the I type. Therefore, the shape of the opening start portion is preferably a pentagon type or an I type.

  In addition, when forming the opening start part 15 by the method as described above, it is not necessary to prepare a linked packaging bag in advance, for example, a sheet-shaped film original before stacking two films, Two films obtained by drilling a through-hole 15 ′ at a predetermined location where an opening start portion is provided and cutting through the center of the through-hole 15 ′ are prepared so that the through-hole marks overlap. In addition, the packaging bag may be manufactured by stacking so that the inner layers are in contact with each other and heat-sealing at a predetermined position.

  Further, the opening start portion 15 may be set at a position where tearing is to be started. For example, as shown in FIG. 2, the center of the opening start portion 15 from the mouth side 19 ′ of the mouth portion 19 or the bottom side 12 ′ of the bottom portion. It is preferable to provide it at a position where the distance d5 is 10 to 40 mm. If the distance d5 is 10 mm or more, when the non-fused portion 17 is picked with the fingertips of both hands and the hands are moved in the opposite directions to tear the packaging bag, the picking allowance is sufficiently large, so it is easy to tear Become. On the other hand, if the distance d5 is 40 mm or less, the contents can be prevented from scattering when the packaging bag is torn. When the distance d5 is less than 10 mm, the mouth 19 of the packaging bag may not be fully opened when the tearing path when the packaging bag is torn.

  Further, as described above, the starting point 15a of the opening start portion 15 is located at the outer edge 17a. On the other hand, the end point 15b of the opening start portion 15 is preferably positioned such that the distance d6 from the end point 15b to the boundary 16a between the fused portion 16 and the non-fused portion 17 is, for example, 3 mm or less. If the distance d6 is 3 mm or less, the unsealing start portion 15 provided in the non-fused portion 17 is easily overlapped without the length of the unsealing start portion 15 provided in the non-fused portion 17 being too long. Therefore, the packaging bag 10 can be easily torn.

  In the present invention, as shown in FIG. 6, the opening start portion 15 may be formed from the outer edge 17 a to the fusion portion 16. That is, as shown in FIG. 6, the unsealing start portion 15 is fused from the entire width direction region of the non-fused portion 17, that is, from the outer edge 17a to the boundary 16a between the fused portion 16 and the non-fused portion 17. You may provide in the part of the area | region of the width direction of the adhesion part 16, ie, the range which does not exceed the area | region of the fusion | melting part 16 from the boundary 16a. Thereby, since a part of the opening start part 15 is also formed in the fusion part 16, it is possible to suppress an increase in the tear strength at the boundary 16a and to tear the packaging bag 10 smoothly with a constant force. Can do.

  In this case, the end point 15b of the opening start portion 15 is preferably positioned such that the distance d7 from the boundary 16a between the fusion portion 16 and the non-fusion portion 17 to the end point 15b is 3 mm or less, more preferably 2 ~ 3mm. If the distance d7 is 2 mm or more, the fused part 16 can be torn with a more constant force. On the other hand, if the distance d7 is 3 mm or less, even when the contents are filled or transported, external stress is applied to the side edge part, particularly the opening start part for some reason, and the packaging bag may be torn, The tear can be retained in the fused portion 16.

In the present invention, the packaging bag can be easily opened from the outer edge 17a even when the opening start portion 15 is formed so that the shape of the opening start portion 15 becomes a fine semi-through hole or weakening line. It is considered that the starting point 15a of the opening start portion 15 is substantially located at the outer edge 17a.
When the opening start portion 15 is formed from the outer edge 17 a to the fusion portion 16, the end point 15 b of the opening start portion 15 is located at the fusion portion 16, and is placed in the accommodating portion 14 beyond the fusion portion 16. Not located up to.

In the packaging bag 10 of the example shown in FIGS. 1-6, although the two films 11 of the same magnitude | size are used, this invention is not limited to this. For example, as shown in FIG. 7 (a), two films 21a and 21b having different widths are prepared and stacked, and the two films 21a and 21b are opposed to the film 21a having a shorter width. By heat-sealing from the outer edge 23a of at least one side end 22a ′ of the two side ends 22a, as shown in FIG. 7B, the non-fused portion 22b made of the longer film 21b. The two films 21a and 21b form a heat-sealed fused part 24, and the non-fused part 22b is wound outwardly or inwardly, from the outer edge 23b of the non-fused part 22b toward the fused part 24. The packaging bag 20 may be manufactured by forming the opening start portion 25.
In this case, as shown in FIG. 7A, the other side end portion 22a '' of the two opposing side end portions 22a of the shorter film 21a is also heat-sealed from the outer edge 23a. Is preferred.
FIG. 7B shows an example in which the non-fused portion 22b is an inner winding.

  Moreover, the packaging bag of this invention is not restricted to the manufacturing method mentioned above, For example, as shown in FIG. 8, even if one film 31 is bent in two and the one side edge part 32b is formed in a cylinder shape. Good. In this case, the bottom 33 is heat-sealed, and the other side end portion 32a is heat-sealed as described above to form the fused portion 34, and the non-fused portion 35 is externally wound or internally wound to start opening. A portion 36 is provided as a packaging bag 30.

  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 accommodating part 14 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, if the contents are in powder form, in order to prevent the contents from scattering, the sides of the packaging bag are grasped by hand to gather the contents downward in the vertical direction, and the bottom of the packaging bag Since there are many opportunities to perform an operation of causing the object to collide with an object such as a desk several times, the effect of the present invention is 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-shaped container, the side end portion where the opening start portion is provided is heat-sealed and fused from the outer edge, so the thickness of this side end portion is twice the thickness of the film. Therefore, as the thickness of the film increases, the rigidity of the side end portion becomes sharper and sharper, and when the hand touches the side end portion, particularly the outer edge, it tends to feel uncomfortable.

  However, according to the present invention, at least one of the two opposing side end portions is heat-sealed on the inner side of the outer edge to form the fused portion. Since the non-fused portion to be formed is not heat-sealed including the outer edge, there is no risk of increased rigidity. Therefore, the non-fused portion is less likely to be sharp, and is less likely to feel uncomfortable even when touched by the hand. Furthermore, by applying a winding process to the non-fused portion 17, the outer edge 17a is less likely to touch the hand directly, making it more difficult to feel uncomfortable. In particular, even if a film having a thickness of 50 μm or more is used and the thickness of the fused portion is 100 μm or more, the structure of the present invention is less likely to feel uncomfortable even if the outer edge 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, according to the present invention, of two opposing side end portions, at least one side end portion is heat-sealed to the inner side from the outer edge, and the fusion portion and the outer side of the fusion portion are not sealed. A side end portion corresponding to a non-fused portion is formed by forming a fused portion and making the non-fused portion externally or internally wound and forming an opening start portion from the outer edge toward the fused portion. It is possible to suppress an increase in the rigidity of the. This part is less likely to be sharp and less likely to feel uncomfortable even when touched by a hand. Moreover, since the outer edge is less likely to be in direct contact with the hand by setting the non-fused portion to be outer or inner, it is less likely to feel uncomfortable. Therefore, in particular, if the packaging bag containing the contents using the packaging bag of the present invention and containing the contents, grasp both the side edges of the packaging bag containing the contents by hand to open the contents. Even when an operation of causing the bottom of the packaging bag to collide with an object such as a desk several times is performed, since discomfort to the hand can be suppressed, workability can be improved.
In particular, when manufacturing a packaging bag using two films, if the other side end portion is also heat-sealed inside the outer edge of the side end portion, discomfort to the hand can be further suppressed.

  Further, according to the packaging bag of the present invention, since the opening start portion is provided from the outer edge toward the fusion portion, when opening the packaging bag, it is sufficient to use a force that only tears two films. . Furthermore, if the opening start portion is provided from the outer edge to the fusion portion, the fusion portion 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 top 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 an example of the side edge part of a packaging bag, (a) is a perspective view which shows the example which processed the non-fusion part into the outside winding, and (b) makes the non-fusion part the inside winding It is a perspective view which shows the processed example, (c) is a top view of (a), (d) is a top view after excising one non-fusion | fusion part in (b). It is the elements on larger scale which show the other example of an opening start part. It is explanatory drawing which shows an example of the formation method of an opening start part. It is the elements on larger scale which show the other example of the side edge part of a packaging bag. It is explanatory drawing which shows the other example of the manufacturing method 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, 13: side end, 13a: one side end, 15: opening start portion, 16: fusion portion, 17: non-fusion portion, 17a: outer edge.

Claims (10)

A bottom portion, a mouth portion facing the bottom portion, and two opposite side end portions, and at least one of the two opposite side end portions is heated to the inner side of the outer edge of the side end portion. A packaging bag having a sealed portion and a non-fused portion formed outside the fused portion,
The non-fused portion is wound on an outer winding or an inner winding,
A packaging bag, wherein an opening start portion is provided from the outer edge toward the fusion portion.   The packaging bag according to claim 1, wherein the opening start portion is provided from the outer edge to the fusion portion.   Both side edges of the two films are heat-sealed to form a bag, and both the side edges are heat-sealed to the inner side of each outer edge to form a fused part and the outer side of the fused part. The packaging bag according to claim 1, wherein the non-fused portion is wound around an outer winding or an inner winding.   The packaging bag according to any one of claims 1 to 3, wherein the opening start portion is a notch.   The packaging bag according to any one of claims 1 to 4, 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 5 contains powdered contents. In the manufacturing method of the packaging bag provided with the bottom portion, the mouth portion facing the bottom portion, and the two side end portions facing each other,
At least one of the two opposite side end portions is heat-sealed inside the outer edge of the side end portion, thereby forming a fused portion and a non-fused portion outside the fused portion. And
The non-fused portion is externally wound or internally wound,
A method for manufacturing a packaging bag, wherein an opening start portion is formed from the outer edge toward the fused portion.   The method for manufacturing a packaging bag according to claim 7, wherein the opening start part is formed from the outer edge to the fusion part.   Both side end portions of the two films are heat sealed to form a bag shape, and both the side end portions are heat sealed to the inner side from the respective outer edges, so that the fused portion and the outer side of the fused portion are formed. The method for manufacturing a packaging bag according to claim 7 or 8, wherein a non-fused portion is formed, and the non-fused portion is externally wound or internally wound.   The method for producing a packaging bag according to any one of claims 7 to 9, wherein a film having a thickness of 50 to 200 µm is used.

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