JP3206050U - Three-sided easy-open packaging bag - Google Patents

Abstract

[PROBLEMS] To easily take out the contents, and more particularly, a bag made of an inflation film, which can be easily opened by hand at one place in the horizontal direction and two places in the vertical direction, that is, at three sides, and has a strong block shape. Alternatively, it is possible to provide a packaging bag in which an adhesive content can be easily taken out. A thermoplastic inflation film that can be easily teared in two directions is adopted as a film constituting the bag 1, and a lateral opening notch 3 is formed at one side of the bag and near the bottom. A longitudinal opening notch 5 for unsealing the side of the lateral opening notch 3 installation side is installed at the upper end which is the opening, and the opposite side of the lateral opening notch 3 installation side is opened. A longitudinal opening notch 5 is provided at the upper end or the lower end. [Selection] Figure 1

Description

  The present invention relates to a bag using an inflation film that can be easily opened by hand or the like, and from which contents can be easily taken out.

  Conventionally, as a method of forming a bag using an inflation film to fill the contents, there is a method of heat-sealing a film extruded into a cylindrical shape to form a bottom portion, and cutting and forming a bag. . In addition, a method is generally used in which the bag is filled with contents, and then the upper end is sealed to form a package.

  However, ordinary polyethylene-based blown films have a sticky resin and cannot be easily torn by hand. Then, the proposal for implement | achieving easy tearability is made | formed by using the polyethylene-type multilayer film which has an intermediate | middle layer which consists of polyethylene and cyclic polyolefin resin. (Patent Document 1)

On the other hand, as a device for facilitating opening, conventionally known methods include a notch (notch) indicating a tear start point and a method of imparting a sewing line, etc. As a notch shape, a notch I notch, A notch V cut, a sawtooth cut, and the like are known.
Forming such a normal notch often impairs the sealing performance, so an easy-open bag is also proposed in which a notch is made on the side edge of the inflation film where heat sealing is not performed and the periphery is heat sealed. . (Patent Document 2)

  In addition, an improvement has been proposed in which the shape of the notch at the side edge of the inflation film is made into a notch in the vertical and horizontal directions, that is, a substantially cross shape or a substantially T shape, so as to be opened vertically and horizontally. (Patent Document 3)

  However, when the contents contained in the package are, for example, foods that contain a lot of moisture and are frozen after filling, the contents are solidified in the package to form a solid block, which is fluid. In addition, it is difficult to divide and take out, so it cannot be taken out easily. In addition, if the contents contained in the package are highly sticky, it is difficult to remove the contents without loss, and in order to facilitate the removal, easy opening is given to the three sides. There was a need for a bag.

  In Patent Document 3, it is necessary to provide a linear heat-sealed portion surrounding the lateral opening notch, so that this portion remains as an adhesive portion between the front surface and the back surface of the bag even after opening. Was insufficient.

JP 2012-000885 A Japanese Unexamined Patent Publication No. 7-329991 Japanese Patent Application No. 2013-1639

  Accordingly, an object of the present invention is to provide a packaging bag that can easily take out the contents. More specifically, the bag made of inflation film can be easily placed by hand at one place in the horizontal direction, two places in the vertical direction, That is, an object of the present invention is to provide a packaging bag that can be opened on three sides and can be easily taken out of a strong block-like or adhesive content.

  As a result of studies to solve such problems, the present inventors have devised the shape, arrangement, and number of notches, and easily combined with the inflation film used for the bag by hand at one place in the horizontal direction. The inventors have found that a packaging bag can be obtained that can be opened in two directions, that is, on three sides, and can be easily taken out of a strong block or sticky contents.

  That is, the feature of the present invention is that the film constituting the bag employs a thermoplastic inflation film that can be easily torn in two directions, that is, in the transverse direction (TD direction) and in the longitudinal direction (MD direction). Opening notch for lateral opening at one side near the bottom of the bag and at the bottom, and an upper opening notch for opening the side of the lateral opening notch installation side The opening notch in the vertical direction for opening the opposite side of the opening notch for installation in the horizontal direction has the opening notch installed at the upper end or the lower end. Here, the vicinity of the bottom means a position less than one third of the bag length from the bottom.

Preferably, a linear heat-sealed part surrounding the periphery of the lateral opening notch is installed at the side end within 10 cm from the bottom of the bag, and the longitudinal opening notch is respectively formed from the bag side end. It is installed at the upper end or the lower end within 5 cm, and more preferably, a linear heat seal portion surrounding the periphery of the opening notch in the lateral direction is installed at the side end within 5 cm from the bottom of the bag, and Desirably, the opening notches in the direction are respectively installed at the upper end or the lower end within 3 cm from the end on the bag side.
If the linear heat-sealed part surrounding the periphery of the opening notch in the horizontal direction exceeds 10 cm from the bottom of the bag, or the opening notch in the vertical direction exceeds 5 cm from the end of the bag, The effective area of the bag after side opening is reduced, which is not efficient.

  However, the longitudinal opening notch for unsealing the lateral opening notch installation side is a position where the linear heat-sealed part surrounding the lateral opening notch can be completely cut off. Must. If the cutout is insufficient, a part of the linear heat seal portion surrounding the periphery remains, and unsealing of the three sides becomes insufficient, which is not preferable. Therefore, it is preferable that the size of the linear heat seal part surrounding the periphery is less than 3 cm from the side end part.

  According to such a configuration, it is possible to easily open the three sides of the bag by hand without requiring a tool such as a bag, and even a strong block-like content can be easily removed. Become. In addition, since the three sides can be opened, the bag can be developed in a flat shape, and even a sticky content can be provided with a packaging bag that can be easily taken out without loss.

  It is an example of the three-sided easy-open packaging bag of the present invention, wherein a lateral opening notch is installed at a side end near the bottom seal portion, and two vertical opening notches are upper ends. It is a figure which is installed in and shows the state before filling the contents.   It is an example of the three-side easy-open packaging bag of the present invention, and a lateral opening notch is installed at a side end near the bottom seal portion, for opening the side of the lateral opening notch installation side. A vertical opening notch is installed at the upper end, which is the opening, and a vertical opening notch is installed at the lower end on the bottom seal side to open the opposite side to the lateral opening notch installation side. It is a figure which shows a state before being filled with the contents.   It is an example of the three-sided easy-open packaging bag of the present invention, and is a diagram showing a state in which the packaging bag of FIG. 1 is filled with the contents, the opening is sealed, and the package is filled with the contents. is there.   It is an example of the three-side easy-open packaging bag of this invention, Comprising: It is a figure which shows the state in the middle of opening of the package of FIG.   It is an example of the three-side easily openable packaging bag of this invention, Comprising: It is a figure which shows the state which is opening the longitudinal direction two sides of the package of FIG.   It is an example of the three-side easy-open packaging bag of the present invention, and after opening the three sides, the packaging bag is developed in a flat shape, and shows a state where the adhesive contents are taken out with a spatula or the like.

Hereinafter, the three-sided easy-open packaging bag of the present invention will be described in detail.
1. (Inflation film formed in a cylindrical shape)
The packaging bag of the present invention is an inflation film formed in a cylindrical shape, and is characterized by using an easily tearable polyolefin film in two directions.
The polyolefin film that is easily tearable in both the longitudinal and transverse directions means a film that can be easily torn in both the longitudinal direction and the lateral direction of the film. MD) Elmendorf tear strength and vertical (TD) Elmendorf tear strength (Elmendorf tear strength measured in accordance with JIS K7128-2) are both formed by a finned film having a strength of 50 N / mm or less. It is good to be done.
As the polyolefin film that is formed into a cylindrical shape and is easily tearable in two longitudinal and lateral directions, a film having a known resin configuration can be used as long as it has the above properties. And the use of a polyethylene-based multilayer inflation film having a layer containing a cyclic polyolefin-based resin and a polyethylene-based resin as an intermediate layer, as described in JP2012-000885A.

2. Production of Packaging Bag Using Film A packaging bag according to the present invention can be produced by a conventionally known method using the above-described inflation film formed in a cylindrical shape.
In forming the bag, the bottom portion of the bag is formed by heat sealing and then cut to form an upper portion which is an opening. When used, the contents are filled from this opening, and the upper part is sealed by heat sealing.

3. FIG. 1 shows a front view of an embodiment of a packaging bag according to the present invention. The bottom end surface of a tubular film (1) obtained by inflation molding is heat sealed (2). By forming the bottom part into a bag shape, a lateral opening notch (3) is provided in the vicinity of the bottom part and at one side edge part, and the periphery of the lateral opening notch (3) is provided. A linear heat seal portion (4) having a surrounding shape is provided, and a longitudinal opening notch (5) for opening the side of the lateral opening notch installation side is installed at the upper end portion which is an opening, This is an example in which a longitudinal opening notch (6) for opening the opposite side to the lateral opening notch installation side is installed at the upper end. The longitudinal opening notch (5) needs to be installed at a position where the linear heat seal portion (4) is completely cut out.
The notch shape may be any shape such as a notch I notch, a notch V cut, a sawtooth cut, or the like.
FIG. 2 is an example in which a longitudinal opening notch (6) for opening the opposite side to the lateral opening notch installation side shown in FIG. 1 is installed at the lower end.

  FIG. 3 is an example of the package body shown in FIG. 1 in which the packaging bag is filled with the contents and the upper end portion is closed by heat sealing (8).

  FIG. 4 is an example showing a stage in which the packaging body shown in FIG. 3 is opened in the lateral direction from the lateral opening notch (3).

  FIG. 5 shows a longitudinal opening notch (5) for unsealing the side of the packaging body shown in FIG. 4 on the lateral opening notch installation side, and the lateral opening notch installation side. It is the example which showed the step which opened by the notch for longitudinal opening for opening an opposite side (6), and opened three sides of the bag.

  FIG. 6 is an example of a state in which the package with the three sides shown in FIG. 5 opened is further developed into a flat shape and the contents (9) are taken out with a spatula or the like (10).

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto without departing from the gist thereof.
1. Manufacture of blown resin film [Raw material]
An outer layer / intermediate layer / inner layer three-layer / three-layer polyethylene multilayer film having the following resin composition was molded by an inflation molding machine at a layer ratio of 1: 1: 1 to obtain a cylindrical inflation film having a thickness of 50 μm and a width of 400 mm. .
Outer layer: L-LDPE resin (MFR = 0.9, density = 0.92)
Intermediate layer: cyclic polyolefin resin (MFR = 1.5, density = 0.92, trade name KP-102 (manufactured by Nippon Polyethylene Co., Ltd.))
Inner layer: L-LDPE resin (MFR = 0.9, density = 0.92)

  The resulting inflation film had an Elmendorf tear strength in the MD direction (3.5 N / mm) and the TD direction (6.8 N / mm).

[Bag shape and notch position]
The obtained tubular inflation film was used to form a bag as shown in FIG.
A bottom seal was applied at a position where the bag width was 400 mm, the bag length was 450 mm, and 10 mm from the bottom.
The transverse opening notch (3) was 5 cm from the lower end, and the surrounding linear heat seal part (4) was semicircular with a radius of 2 cm. The longitudinal opening notch (5) for opening the side on the lateral opening notch installation side is 2.5 cm from the upper side and the side end, and the longitudinal opening notch for opening the opposite side ( 6) was 2.5 cm from the top and the opposite side end.
The shape of each notch was a notch I notch having a length of 10 mm, and a three-sided easy-open bag was obtained.

[Enclosure and removal of contents 1]
Into the resulting three-sided easy-open bag, put 2.5 kg of chopped ginger, remove air as much as possible, and heat-seal at a position 20 mm from the upper end to obtain a package as shown in FIG. . The package was leveled and stored at minus 18 ° C. for 24 hours and frozen.
First, only one side in the horizontal direction was opened from the horizontal opening notch (3), and the contents were taken out. However, the content was solidified by freezing and was difficult to take out.
Next, the longitudinal opening notch (5) for unsealing the lateral opening notch side and the longitudinal opening notch (6) for opening the opposite side are opened and taken out. As a result, it was easily removed without any problems.

[Enclosure and removal of contents 2]
In the obtained three-sided easy-open bag, put peeled flesh, 5 mm square shiitake mushrooms and koji rice mixed with koji, heat sealed at a position 20 mm from the upper end, A package as shown in FIG. 3 was obtained.
First, only one side in the horizontal direction was opened from the horizontal opening notch (3), and the contents were taken out. However, although the contents are highly viscous and the main part can be easily taken out, it is difficult to take out the remaining part.
Next, the longitudinal opening notch (5) for unsealing the lateral opening notch installation side and the longitudinal opening notch (6) for opening the opposite side are opened, FIG. When the rubber spatula (10) was used, the remaining part could be easily removed.

  1 .. Packaging bag 2.. Bottom seal part 3.. Horizontal opening notch 4.. Linear heat seal part surrounding the lateral opening notch (3) 5. A longitudinal opening notch for unsealing the side where the lateral opening notch (3) is installed. 6. Opening the opposite side of the side where the lateral opening notch (3) is installed. Opening notch for vertical direction, 7 .... Upper part of upper seal for sealing, 8 .... Upper seal part, 9 .... Adhesive contents, 10 .... Later

Claims (5)

  As a film forming a bag, it is an inflation film formed in a cylindrical shape, and an easily tearable polyolefin film is used in two vertical and horizontal directions. The opening notch and the longitudinal opening notch for opening the lateral opening notch installation side are installed at the upper end of the opening, and the opposite side to the lateral opening notch installation side A three-side easy-open packaging bag, wherein a longitudinal opening notch for opening the bag is installed at the upper end or the lower end.   The three-side easy-open packaging bag according to claim 1, wherein the lateral opening notch is provided with a linear heat-sealed portion surrounding the periphery of the lateral opening notch.   The inflation film formed in a cylindrical shape is a bag having a bottom formed by heat sealing and an opening provided in the opposite portion, and the linear heat sealing portion surrounding the periphery of the opening notch in the lateral direction is a bag 2. A notch for opening in the vertical direction is installed at an upper end or a lower end within 5 cm from the bag side end portion, respectively, and is installed at a side end portion within 10 cm from the bottom portion. The three-sided easy-open packaging bag according to any one of 2 to 2.   The easily tearable polyolefin film is a polyethylene-based multilayer inflation film having a layer containing a cyclic polyolefin-based resin and a polyethylene-based resin in an intermediate layer. Three-sided easy-open packaging bag.   5. The easily tearable polyolefin film according to claim 1, wherein the MD direction Elmendorf tear strength and the TD direction Elmendorf tear strength are 50 N / mm or less, respectively. Three-sided easy-open packaging bag as described in 1.

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