JP2015013653A - Bag body and package body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag body and a package body in which generation of cut pieces can be suppressed upon seal-opening while being applicable to a general-shaped bag body like a general-shaped three way sealed bag etc., and having versatility capable of setting a seal-opening position freely along a side seal part of the bag body and easily-opening performance capable of being torn up manually.SOLUTION: In a bag body, in which laminated films having heat seal performance in the inner surface are folded with the inner surfaces facing to each other and heat seal processing is applied to the folded part and the peripheral edge part facing in parallel to the folded part to form a pair of side seal parts facing to each other, the structure of the side seal part of the folded part side has a heat sealed structure while the folded part is folded inside.

Description

  The present invention relates to a bag and a package used to protect and distribute contents by filling and sealing the contents, and in particular, the inner surface is composed of a laminated film having heat sealability, and heat sealing. The present invention relates to a bag body and a packaging body that can be opened by tearing by hand from a notch or the like provided in a side seal portion provided with.

  Conventionally, it has been widely practiced to wrap and distribute the contents in a bag formed by heat-sealing the peripheral edge of a heat-sealable film, contributing to contents protection, manufacturing cost reduction, etc. doing.

Bags used for such packaging are required to be easy to use, and it is easy to open a package that contains the contents in the bag and seals the opening by hand without using a blade. Many proposals have been made regarding contrivances regarding openability.
For example, as a rudimentary device, there is one that opens the package by hand by providing a notch or notch in the heat seal part of the bag, and it is formed of a composite film consisting of a base material layer and a heat seal layer A large number of fine scratches penetrating at least the base material layer are continuously provided at the edge of the heat seal portion of the sealed bag body, and the heat seal portion is torn from anywhere on the edge of the heat seal portion provided with the scratch. There is what has been made (see Patent Document 1).

JP 63-82965 A JP 2009-255959 A

There are various types of bags, but the three-sided seal bag is most often used because it is not bulky and can be easily opened by tearing.
However, if the package containing the contents in the bag and sealing the opening is torn and opened by hand, a piece of film constituting the bag will be generated and become garbage, which may be accidentally swallowed by infants or contaminate the environment. In particular, in the medical field, when the nurse picks up the cut piece that has fallen on the floor, the hands get dirty, or the cut piece falls into the body of the patient during the operation, and there is a concern about infection. May cause problems.
Such a problem is a concern that the better the tearability of the bag body, the three-side sealed bag is the form of the bag body that is most likely to produce a cut piece.

  Also, when tearing a package that contains the contents in a bag and sealing the opening by hand, hold the heat seal part below the tear starting position with one hand and tear the starting position with the other hand. While holding the upper heat seal part, move the upper hand to tear the package, but if it tears vigorously, the contents are fluid or the contents are heavy and held with one hand. In difficult cases, the balance is lost at the moment of holding the bag opened with one hand immediately after the tearing is finished, the contents are spilled and the surroundings are soiled, the contents are dropped and soiled, or hot. There is a problem that the contents may adhere to the hand and cause burns.

  In order to avoid such a problem, a packaging bag has been proposed in which the propagation of tearing is stopped by providing a semi-circular cut in the heat seal portion where tearing propagates (see Patent Document 2).

  However, the packaging bag described above requires a wide heat-sealed portion, which is not only applicable to general-shaped bags, but is limited in terms of opening position, so it is not versatile and popular. The fact is not.

  The present invention has been made in view of the above circumstances, and can be applied to a bag having a general shape such as a three-side sealed bag in a normal form, and the opening position can be freely set along the side seal portion of the bag. The main object is to provide a bag body and a packaging body that have versatility that can be set in various positions and easy opening that can be torn by hand, but that can suppress the generation of cut pieces when opened. With a purpose.

  As a result of various studies, the inventor turned the laminated film having the inner surface heat-sealable so that the inner surfaces face each other, and applied heat sealing to the folded portion and the peripheral edge portion facing substantially parallel to the folded portion. In the bag body that forms a pair of side seal portions facing each other, the structure of the side seal portion on the folded portion side is a structure that is heat-sealed in a state where the folded portion is folded inward. The present invention has been completed by finding that the above can be solved.

  That is, the invention according to claim 1 of the present invention is a bag body having a first side seal portion and a second side seal portion facing each other, the inner surface of which is composed of a laminated film having heat sealing properties. The first side seal part is heat-sealed in a state where the folded part formed by folding the laminated film is folded inside, and the second side seal part is faced by folding. The bag is characterized in that the inner surfaces of the laminated films are heat-sealed with each other, and the second side seal portion has a tear starting structure for opening.

  The invention according to claim 2 of the present invention is the bag according to claim 1, wherein the bag is a three-way seal bag having a bottom seal portion.

  According to a third aspect of the present invention, the contents are stored in the bag according to any one of the first or second aspects, and the opening of the bag is heat sealed. The package is characterized by being sealed.

In the bag according to the present invention, the first side seal portion facing the second side seal portion having a tear start structure such as a notch or a notch is folded inward from the folded portion formed by folding the laminated film. It has a heat-sealed structure.
Therefore, at the time of opening, the tear start structure of the second side seal portion can be easily torn by hand, and the propagation of the propagation of the tear is caused by the folded portion folded inside the first side seal portion. As a result, the above-mentioned cut pieces are not generated.

  Also, it is not necessary to have a specially shaped bag body, such as a specially wide heat-sealed part, and it can be implemented in the usual three-sided sealed bag shape, and the width of the opening part at the time of opening is not narrowed The contents can be easily taken out, and a normal packaging machine can be used when filling the contents.

  Further, by making the folded portion continuously folded inward, the entire side seal portion on one side of the bag body can be made difficult to tear, and the other side facing the side seal portion difficult to tear can be made. It can be provided with versatility that it can be torn from any position of the side seal portion.

  Further, in the package according to the present invention, since the tearing is stopped in a state where the package is held with both hands, the risk of dropping or spilling the contents is reduced, and hygiene and safety are excellent.

It is explanatory drawing which shows an example of the bag body which concerns on this invention, (a) is a schematic plan view, (b) is AA sectional drawing in (a), (c) is BB sectional drawing in (a). It is. It is a figure explaining the structural example of the 1st side seal part which concerns on this invention. It is a schematic plan view which shows the other example of the bag body which concerns on this invention. It is a schematic plan view which shows an example of the package which concerns on this invention.

  Hereinafter, embodiments of a bag body and a packaging body according to the present invention will be described in detail with reference to the drawings.

<Bag body>
FIG. 1 is an explanatory view showing an example of a bag according to the present invention, where (a) is a schematic plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is B in (a). It is -B sectional drawing.
The bag according to the present invention is composed of a laminated film 1 having an inner surface 2 having heat sealability. For example, in the example shown in FIG. 1A, along the upper and lower sides of the bag 10A, Opposing first side seal part 11a and second side seal part 11b are formed, and bottom seal part 13 is formed near the left end of bag body 10A. On the other hand, the right end of the bag body 10 </ b> A is an opening 14.
The second side seal portion 11b is provided with a substantially V-shaped notch 12 as a tear starting structure for opening.
In FIG. 1A, the tear line 15 indicated by a broken line extending from the notch 12 to the first side seal portion 11a is not actually provided in the bag body 10A before opening, but it is easy to explain. Visualized to do.

  And as shown in FIG.1 (b), the 1st side seal part 11a is heat-sealed in the state by which the folding | returning part formed by folding | folding of the laminated | multilayer film 1 was folded inside, and FIG. As shown to (c), the 2nd side seal part 11b is heat-sealed by the inner surfaces 2 of the laminated | multilayer film 1 which faced each other by the folding | turning.

The configuration of the first side seal portion 11a will be described in more detail with reference to FIG.
FIG. 2 is a diagram illustrating a configuration example of the first side seal portion according to the present invention, in which the folded portion formed by folding the laminated film is heat-sealed in a state where the folded portion is folded inward, It is a figure explaining a mode that a side seal part is formed.
Here, FIG. 2A shows a state in which the inner surface 2 of the laminated film 1 is folded back so that the folded portions 21 are formed, and FIG. 2B shows the folded portion 21 folded inward. FIG. 2C shows a state in which the first side seal portion is formed after heat sealing is performed.
Further, in the figure, reference numerals 21a, 22a, and 23a denote outer surface side folded ends of the folded parts 21, 22, and 23, respectively, and reference numerals 21b, 22b, and 23b denote the folded parts 21, 22, and 23, respectively. The inner side folded end is shown.

  In the present specification, the “folded end” refers to the end of the folded portion formed by folding the laminated film 1, and the “inner surface side folded end” refers to the inner surface 2 side (heat sealability) of the laminated film 1. The “outer surface side folded end” refers to the folded end on the outer surface side (the side opposite to the side having heat sealability) of the laminated film 1.

  In the present invention, in order to form the first side seal portion 11a, first, as shown in FIG. 2 (a), the laminated film 1 is half-folded so that the inner surfaces 2 face each other, and the folded portion 21 is formed. Form.

Next, as shown in FIG. 2B, the folded portion 21 is folded inward to form the folded portion 30.
In the formation process of the folding part 30, the folding parts 22 and 23 are newly formed, and in FIG. 2A, the folding part 21 having a mountain-like shape with the outer surface side folding end 21a as a tip is It is folded between the folded portions 22 and 23 and transformed into a valley shape.
Such a form can be formed, for example, by inserting a gusset folding plate as in manufacturing a one-piece gusset bag.

  Thereafter, as shown in FIG. 2C, heat sealing is performed on the region where the first side seal portion 11a is formed with the folded portion 21 folded inward, as shown in FIG. The first side seal part 11a is formed. In addition, in order to avoid becoming complicated, the description of the oblique line which shows that it is a heat seal part is abbreviate | omitted in this FIG.2 (c).

In the present invention, as shown in FIG. 2 (c), the first side seal portion 11a is heat-sealed in a state in which the folded portion 21 is folded inward.
Therefore, in the present invention, even when tearing starts from the notch 12 shown in FIG. 1A and the tear line 15 extends toward the first side seal portion 11a, the tear line 15 is When the tip of the folding part 30 in the side seal part 11a (that is, the inner side folding end 21b) is reached, the folding part 30 formed by folding the folding part 21 inward acts so as to inhibit the progress of tearing. Then, the tearing of the first side seal portion 11a is stopped.

The above will be described in more detail.
For example, in FIG. 2 (c), when each laminated film in the portion where the laminated film 1 is overlapped with 4 layers is assumed to be 1a, 1b, 1c, 1d from the upper layer (Z direction in the figure), The tear that has propagated the laminated film 1a from the right side (X direction side) tries to propagate to the laminated film 1a even after reaching the inner surface side folded end 21b, but the laminated film 1a on the left side from the inner surface side folded end 21b Since the laminated film 1b to which the tear is not propagated and the inner surfaces 2 are heat-sealed, the progress of the tear is inhibited.
Similarly, the tear that has propagated through the laminated film 1d from the right side (X direction side) in the drawing tends to propagate to the laminated film 1d after reaching the inner surface side folded end 21b, but from the inner surface side folded end 21b. Since the laminated film 1c on the left side and the inner surface 2 of the laminated film 1d on which the tear is not propagated are heat-sealed, the progress of the tear is inhibited.
Therefore, tearing stops at the first side seal portion 11a on the left side of the inner surface side folded end 21b.

  Therefore, in the package formed from the bag body 10A, tearing stops after the tear line 15 reaches the inner surface side folding end 21b of the first side seal portion 11a even if it is torn from the notch 12 at the time of opening. No cut piece is produced.

  Further, in the present invention, it is not necessary to make a specially shaped bag body such as a specially wide width of the heat seal part, and it can be implemented in a normal three-sided seal bag shape, and the width of the opening part at the time of opening is The contents can be easily taken out without being narrowed, and a normal packaging machine can be used when filling the contents.

  In addition, in FIG. 1 (a), although the three-sided seal bag was illustrated as a preferable form of the bag body which concerns on this invention, the shape of a 2nd side seal part is a linear form in the bag body which concerns on this invention. For example, like the bag body 10B shown in FIG. 3, after providing the deformed second side seal portion 11b, the unsealed portion is narrowed by cutting off the surplus portion. It can also be made into a bag shape.

Here, the above-mentioned opening part is formed at the position of the tear line 15 by tearing from the notch 12 toward the first side seal part 11a.
Although the tear line 15 is not formed in the bag body 10B before the tearing action, the position of the tear line 15 is indicated by a broken line in FIG. 3 for ease of explanation.

In addition, in FIG. 1 (a), the second side seal portion 11b is illustrated with a form in which only one substantially V-shaped notch 12 is provided as a tear start structure. In the body, the second side seal portion 11b may have a structure having tear starting structures such as notches and cuts at a plurality of locations.
In addition, by using a uniaxially stretched film having a straight tearing property in one direction as the base film constituting the laminated film 1, a structure that can be torn from any position of the second side seal portion 11b, It is good also as a tear start structure which the side seal part 11b has.
In such a case, by forming the folded portion 30 as described above on the entire first side seal portion 11a facing the second side seal portion 11b, which of the second side seal portions 11b Even in the case of tearing from the position, tearing can be stopped at the first side seal portion 11a as described above.

(Laminated film)
The laminated film 1 forming the bag according to the present invention is composed of a film in which at least a base film and a heat-sealable film are laminated, and an intermediate layer is provided between the base film and the heat-sealable film as necessary. May be.

  Base films include biaxially stretched films with excellent physical strength and heat resistance, such as polyethylene terephthalate, polyamide, polypropylene, and polyethylene, which are commonly used for food packaging materials, and metals for these films. A film in which an oxide or a metal is deposited, an oxygen barrier coating is provided, or an easy adhesion layer is provided can be used. Moreover, you may use the horizontal uniaxially stretched film (For example, horizontal uniaxially stretched polypropylene film, product name "YT-22", Toray Film Processing Co., Ltd. product) which has a straight tear property in a horizontal direction.

  As the heat-sealable film, a general heat-sealable film that is softened by heating and thermally fused by applying pressure can be used. For example, polyethylene, polypropylene, polyester, polyacrylonitrile, cyclic olefin copolymer, An unstretched film such as an acid-modified polyolefin, an ethylene / vinyl acetate copolymer, or an ionomer may be properly used depending on the application.

  As the intermediate layer, in addition to the film used for the base film, a metal foil, an ethylene / vinyl alcohol copolymer, a light-shielding film, or the like can be used as a single layer or multiple layers depending on the application.

  In particular, when a biaxially stretched film is used as the base film, it is beneficial in that a straight uniaxially stretched film is used for the intermediate layer to be bonded to the heat-sealable film, so that it is easy to tear straight and is difficult to tear. is there.

  Further, the method for laminating the film in the laminated film used for the bag according to the present invention is not particularly limited, and dry lamination, non-solation lamination, extrusion lamination of molten resin, etc., which are ordinary film lamination methods, are used. Can do.

  The bag according to the present invention can be printed with characters and patterns, and is usually printed on the substrate film by gravure printing, flexographic printing, or the like.

(Bag making)
The bag-making of the bag according to the present invention can be carried out by a bag-making method obtained by combining the bag-making method of the one-side gusset bag and the bag-making method of the two-side sealed bag. Bags can be made with a bag making machine.

  That is, the roll-shaped laminated film set in the bag making machine is half-folded vertically as in the case of manufacturing a two-side sealed bag, and the both ends of the laminated film are overlapped. As in the case of manufacturing, a gusset folding plate is inserted to form a fold portion, a vertical seal for forming both side seal portions is applied, and then a horizontal seal is applied and cut according to the present invention. A bag can be manufactured.

  Further, in the present invention, as described above, since the folding portion 30 as described above is formed in the entire first side seal portion 11a, tearing can be stopped at any location. A plurality of notches may be provided in the side seal portion 11b at the time of bag making, or a number of fine scratches penetrating at least the base material layer may be provided in advance at both end edges of the laminated film before bag making. .

(Folding part)
If the length of the folded portion 30 of the bag according to the present invention (the distance in the horizontal direction from the inner surface side folded end 21b to the outer surface side folded end 23a in the example shown in FIG. 1B) is too short, the laminated film 1 May be cut together with the laminated film 1 when it is torn vigorously, and on the other hand, it is useless if it is too long.
Therefore, the length of the folding part 30 according to the present invention is preferably 2 mm or more and not more than the same length as the width of the first side seal part 11a.

In the example shown in FIG. 1B, the inner surface of the folding part 30 (the surface including the outer surface side folded end 21a and the outer surface side folded end 22a, and the outer surface side folded end 21a and the outer surface side folded end 23a is included. Surface) corresponds to the outer surface of the laminated film 1, not the inner surface 2 having heat sealability. Therefore, the inner surface of the folding part 30 is not heat-sealed, and the folding part 30 may open and present an unsightly appearance.
In this case, by applying a heat sealant to the outer surface of the laminated film 1 at a position to be the folded portion 30 in advance, the inner side of the folded portion 30 when heat-sealing the first side seal portion 11a. Since this surface is also heat-sealed, it is possible to prevent the folding portion 30 from opening.

<Packaging body>
The package according to the present invention is such that the contents are stored in the bag according to the present invention, and the opening of the bag is heat sealed and sealed.
FIG. 4 is a schematic plan view showing an example of a package according to the present invention.
For example, the package 50 shown in FIG. 4 has the contents M stored in the bag 10A shown in FIG. 1A, and the opening 14 of the bag 10A is heat-sealed to form a hermetically sealed portion. 51 is formed.

Since the package according to the present invention is formed from the above-described bag according to the present invention, when tearing and opening the package, tearing stops with the package held by both hands, so the contents are dropped. The risk of spilling or spilling is reduced, and hygienic and safe.
In addition, as described above, the bag according to the present invention can be implemented in a normal three-side sealed bag shape, and it is not necessary to have a specially shaped bag body such as a specially wide width of the heat seal portion. A normal packaging machine can also be used when filling the contents.

  As mentioned above, although each embodiment was described about the bag and package concerning the present invention, the present invention is not limited to the above-mentioned embodiment. The above-described embodiment is an exemplification, and the technical idea described in the claims of the present invention has substantially the same configuration and exhibits the same function and effect regardless of the case. It is included in the technical scope of the invention.

  Next, the present invention will be described in more detail with reference to examples and comparative examples.

Example 1
(Manufacture of laminated film)
A biaxially stretched polyamide film (product name “N2102”, manufactured by Toyobo Co., Ltd.) having a thickness of 15 μm and a width of 580 mm is selected as the base film, and the design and characters are printed on the corona-treated surface with a gravure printing machine. did.
A two-component curable urethane adhesive is applied to the printed surface of the printed biaxially stretched polyamide film, and an unstretched polyethylene film (product name “L4102”, manufactured by Toyobo Co., Ltd.) having a thickness of 40 μm and a width of 580 mm is applied. After pasting, the laminated film A was obtained by slitting to a width of 280 mm.

(Manufacture of bags)
A first side seal portion having a width of 10 mm, in which the laminated film A is set in a gusset bag making machine and a gusset folding plate is inserted into the folded portion while being folded in half to form a folding portion having a length (depth) of 5 mm. And a second side seal portion having a width of 12 mm facing the first side seal portion having the folded portion is formed by a vertical seal, and the second side seal portion having the width of 12 mm is trimmed to make a width. One notch was formed at a position 10 mm from the upper end of the bottom seal portion forming position after 10 mm. Thereafter, a bottom seal portion having a width of 10 mm was formed by a horizontal seal, and then cut at a position 2 mm from the lower end of the bottom seal portion to obtain a bag according to the present invention having a width of 130 mm and a length of 210 mm.

(Tear test)
After the bag body was filled with 350 ml of water, the opening was heat-sealed to provide a hermetic seal portion having a width of 10 mm to obtain 10 packaging bodies according to the present invention.
After holding the heat seal part under the notch of the package with the left hand and the heat seal part on the notch with the right hand, pull the right hand toward the front, and the folded part from the second side seal part provided with the notch The package was torn toward the first side seal part that it had.
As a result, in all 10 pieces, tearing stopped at the tip of the folded portion of the first side seal portion, and no cut piece was generated.
When the tearing stops, the package is held with both hands, and the tear opening can be kept horizontal so that water does not spill, so the package can be opened without spilling water. did it.

(Example 2)
(Manufacture of laminated film)
A silicon oxide-deposited biaxially stretched polyethylene terephthalate film (product name “IB-PET-RB”, manufactured by Dainippon Printing Co., Ltd.) having a thickness of 12 μm and a width of 580 mm is selected as the base film, and is deposited by a gravure printing machine. A pattern and characters were printed on the coating surface of the surface.
A two-component curable urethane adhesive is applied to the printed surface of the printed silicon oxide-deposited biaxially stretched polyethylene terephthalate film, and a laterally uniaxially stretched polypropylene film (product name “YT42”, 25 μm thick, 580 mm wide) After bonding together Toray Film Processing Co., Ltd., a two-component curable urethane adhesive is applied to the polypropylene film surface, and as a heat-sealable film, an unstretched polypropylene film having a thickness of 60 μm and a width of 580 mm (product name) After pasting together “P1147” (manufactured by Toyobo Co., Ltd.), it was slit to a width of 280 mm to obtain a laminated film B.

(Manufacture of bags)
The laminated film B was set on the gusset bag making machine used in Example 1, and notches were formed at two positions, a position 10 mm from the upper end of the bottom seal portion forming position and a position 25 mm from the opening. Except that the bag was made in the same manner as in Example 1 to obtain a bag according to the present invention having a width of 130 mm and a length of 210 mm.

(Tear test)
After the bag body was filled with 350 ml of water, the opening was heat sealed to provide a hermetic seal portion having a width of 10 mm, and 20 packaging bodies according to the present invention were obtained.
After holding the heat seal part under the notch of the bottom seal side with the left hand and the heat seal part on the notch with the right hand of ten of the package bodies, the package body was torn by pulling the right hand forward.
Also, with the remaining 10 packages, upside down from the above test, hold the heat seal part under the notch on the sealing seal side with the left hand, hold the heat seal part on the notch with the right hand, and then pull the right hand toward you. The package was torn.
As a result, the tearing stopped at the tip of the folded portion of the first side seal portion, and no cut piece was generated even when all 20 pieces of 10 pieces were torn from any notch.

Example 3
(Manufacture of laminated film)
A double-sided corona-treated biaxially stretched polypropylene film (product name “FOR-BT”, manufactured by Phutamura Chemical Co., Ltd.) having a thickness of 20 μm and a width of 580 mm is selected as a base film, and a gravure printing machine is used for design and characters on one side. After printing the film, the film was reversed, and a heat sealant for polypropylene film was continuously applied in a strip shape at a width of 8 mm at two positions 150 mm from both ends of the other surface.
A two-component curable urethane adhesive is applied to the printed biaxially stretched polypropylene film pattern and the character printed surface, and a laterally uniaxially stretched polypropylene film (product name “YT42”, Toray, 25 μm thick and 580 mm wide). After bonding together, a two-component curable urethane adhesive is applied to the lateral uniaxially stretched polypropylene film surface, and an unstretched polypropylene film having a thickness of 60 μm and a width of 580 mm is used as a heat-sealable film ( The product name “P1147” (manufactured by Toyobo Co., Ltd.) was bonded together, and then a laminated film C was obtained that was slit to a width of 280 mm and had a heat sealant application part having a width of 8 mm in the center of the surface.

(Manufacture of bags)
The laminated film C is set in a gusset bag making machine, and a half-folded gusset folding plate is inserted into the folded portion to form a folded portion having a length (depth) of 6 mm, and then a first side having a width of 10 mm. A seal portion and a second side seal portion having a width of 12 mm facing the first side seal portion having the folded portion are formed by a vertical seal, and the second side seal portion having a width of 12 mm is trimmed. One notch was formed at a position 10 mm from the upper end of the bottom seal portion formation position after the width of 10 mm. Thereafter, a bottom seal portion having a width of 10 mm was formed by a horizontal seal, and then cut at a position 2 mm from the lower end of the bottom seal portion to obtain a bag according to the present invention having a width of 125 mm and a length of 210 mm.
In the bag body, since the heat sealing agent is applied to the inner surface of the folded portion, when the first side seal portion is heat sealed, the inner surfaces of the folded portion are heat sealed, Therefore, the folding portion is not opened. As a result, not only did it have a good appearance, it was easy to bundle the bags after bag making.

(Tear test)
After the bag body was filled with 340 ml of water, the opening was heat-sealed to provide a hermetic seal portion having a width of 10 mm to obtain 10 packaging bodies according to the present invention.
After holding the heat seal part under the notch of the package with the left hand and the heat seal part on the notch with the right hand, the package was torn by pulling the right hand forward.
As a result, in all 10 pieces, tearing stopped at the tip of the folded portion of the first side seal portion, and no cut piece was generated.
When the tearing stops, the package is held with both hands, and the tear opening can be kept horizontal so that water does not spill, so the package can be opened without spilling water. did it.

(Comparative example)
(Manufacture of bags)
The laminated film B produced in Example 2 is set in a gusset bag making machine, folded half-folded, without forming a folded portion, and a side seal portion having a width of 12 mm is formed on the folded portion and the opposite side of the folded portion. After the vertical seal was formed, the side seal part was trimmed to a width of 10 mm, and then one notch was formed at a position 10 mm from the upper end of the bottom seal part.
Thereafter, a bottom seal portion having a width of 10 mm was formed by a horizontal seal, and then cut at a position 2 mm from the lower end of the bottom seal portion to obtain a comparative bag body having a width of 130 mm and a length of 210 mm.

(Tear test)
After the bag body was filled with 350 ml of water, the opening was heat-sealed to provide a hermetic seal portion having a width of 10 mm to obtain 10 packaging bodies of comparative examples.
After holding the heat seal part under the notch of the package with the left hand and the heat seal part on the notch with the right hand, the package was torn by pulling the right hand forward.
As a result, in all of the ten pieces, the side seal portion opposed to the side seal portion in which the notch was formed was easily torn and a cut piece was generated.

DESCRIPTION OF SYMBOLS 1 ... Laminated film 2 ... Inner surface 10A, 10B ... Bag body 11a ... 1st side seal part 11b ... 2nd side seal part 12 ... Notch 13 ... Bottom seal Part 14: Opening part 15 ... Tear line 21, 22, 23 ... Folded part 21a, 22a, 23a ... Outer surface side folded end 21b, 22b, 23b ... Inner surface side folded end 30 ...・ Folding part 50 ... Packaging body 51 ... Sealing seal part M ... Contents

Claims (3)

A bag body having a first side seal portion and a second side seal portion, the inner surface of which is composed of a laminated film having heat sealing properties, facing each other,
The first side seal part is heat-sealed in a state in which a folded part formed by folding the laminated film is folded inside,
The second side seal part is heat-sealed between the inner surfaces of the laminated film facing each other by folding,
The bag body, wherein the second side seal portion has a tear starting structure for opening.   The bag according to claim 1, wherein the bag is a three-side sealed bag having a bottom seal portion. The package body according to any one of claims 1 and 2, wherein the contents are stored in the bag body, and the opening portion of the bag body is heat-sealed to be sealed.

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