JP2005075430A - Packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag either the front or the back of whose packaging material is a scheduled opening part, which ensures a wide opening, is provided with a superior opening characteristic, and the opening method of which is intuitively recognized. <P>SOLUTION: In forming these packaging bags A-E, a front and back packaging material 1 is provided with end edge seals (a top seal 3, a side seal 4 and a bottom seal 5). Either the front or the back packaging material 1 is a scheduled opening part 1a, and an easy-opening processed part 1b is formed along the inside of the end edge seal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a packaging bag formed by applying edge seals to front and back packaging materials, and more particularly to a packaging bag suitable for packaging confectionery and delicacies.

  Packaging bags formed by applying edge seals to front and back packaging materials are widely used. In this type of packaging bag, the top seal portion is normally a scheduled opening portion, and the top seal portion is opened to take out the contents. For example, an easy-cut part is formed on the side of the top seal part, the top seal part is torn and opened from this easy-cut part, or the top seal part is an easily peelable seal, and the top seal part is peeled off. What is opened is known.

  However, when a relatively small packaging bag is opened at the top seal portion, it is difficult to secure a wide opening and there is a problem that it is difficult to take out the contents. In particular, when the contents of the packaging bag are to be directly taken out of the packaging bag by hand, such as confectionery and delicacy, insertion of the hand is hindered by the narrow opening, and the contents can be taken out easily. It will decline.

  In order to deal with such problems, resin trays are widely used in confectionery and delicacy packaging bags. In this type of packaging bag, the contents are filled on the resin tray, so it is possible to easily take out the contents by pulling out the resin tray from the opening, but on the other hand, the addition of the resin tray This has the disadvantage of increasing costs.

  Therefore, it has been proposed to use either the front or back packaging material as a scheduled opening portion, and to open the packaging bag at the scheduled opening portion (see, for example, Patent Document 1). If the packaging bag is configured in this way, a wide opening is secured, and the contents can be easily taken out, and the cost can be reduced by eliminating the need for a resin tray.

Japanese Patent Laid-Open No. 11-91800 (page 6, FIG. 8)

By the way, the packaging bag shown by patent document 1 uses a top seal and / or a bottom seal as an easily peelable seal, tears off this easily peelable seal, and tears a trough fold part of a gusset, thereby opening a wide opening. The secured opening is made possible.
However, since the gusset portion is formed relatively flexibly due to its nature, there is a problem that it is not easy to tear linearly even if an easy opening process is performed. Moreover, since the valley fold part of a gusset part is a position where it is easy to hide in appearance, there also exists a problem that a user cannot recognize the opening method intuitively.

  The present invention has been considered in view of the above circumstances, and the packaging material on either the front or back side is a scheduled opening portion, and can be opened with a wide opening, and has excellent opening properties. In addition, an object is to provide a packaging bag that can intuitively recognize the opening method.

In order to achieve the above object, the packaging bag of the present invention is a packaging bag formed by applying edge seals to the front and back packaging materials, wherein the packaging material on either the front or back side is the opening scheduled portion, and the end The easy opening portion is formed along the inside of the edge seal.
If the packaging bag is configured in this way, either the front or back of the packaging material is used as a scheduled opening portion, and the packaging bag is opened with a wide opening, so that the contents can be easily taken out by the wide opening. In addition, the cost can be reduced by eliminating the need for a resin tray.
In addition, since the easy opening portion is formed along the inner side of the edge seal, the edge seal serves as an opening guide, and good opening properties can be realized.
Further, since the inside of the edge seal is a position that is easy to visually recognize, there is an advantage that the opening method can be intuitively recognized.

Moreover, the packaging bag of this invention is set as the structure by which the lower end parts of the said packaging material and / or upper end parts are connected so that expansion is possible via a gusset member.
If the packaging bag is configured in this manner, the packaging bag can be self-supporting, so that it is easy to display at the time of sale, and it is possible to display many packaging bags in a small space. In addition, since the packaging bag is three-dimensionalized and the form after opening becomes a tray, there is an advantage that the contents are not easily overflowed.

Moreover, the packaging bag of this invention is set as the structure by which the opening start part of the said opening scheduled part is joined to the said other packaging material or the said gusset member by an easily peelable seal | sticker.
If a packaging bag is comprised in this way, since the opening start part of an opening planned part can be peeled off easily, the ease of opening can be improved.

Moreover, the packaging bag of this invention is set as the structure by which the opening start part of the said opening scheduled part is provided with the tab for opening operation.
If a packaging bag is comprised in this way, not only opening opening position will become clear, but opening operation can be easily performed with a tab.

Moreover, the packaging bag of this invention is set as the structure by which the said tab is accommodated in the folded shape in the unsealed state.
If the packaging bag is configured in this way, the tab does not get in the way before opening, and the tab can be easily picked at the time of opening.

In the packaging bag of the present invention, the tab includes a finger hooking hole.
If a packaging bag is comprised in this way, since it can be opened by putting a finger on a tab, the ease of opening can further be improved.

Moreover, the packaging bag of this invention is set as the structure by which the said opening scheduled part is opened in the shape of one side opening.
If a packaging bag is comprised in this way, the whole opening scheduled part can be opened by one opening operation.

In the packaging bag of the present invention, the other packaging material or the gusset member includes a hanging tab that is superposed on the tab.
If the packaging bag is configured in this manner, the packaging bag can be suspended, so that display at the time of sale is facilitated and a large number of packaging bags can be displayed in a small space.
In addition, by superposing the tab for opening operation and the tab for hanging, it is possible to avoid the packaging bag being hung only by the tab for opening operation, and to prevent opening due to the holding load.

Moreover, the packaging bag of this invention is set as the structure by which the said opening expected part is divided | segmented in the center part, and is opened in a double-folded form.
If a packaging bag is comprised in this way, it will become possible to select the state which opened only one opening plan part, and the state which opened both opening plan parts.
Further, when a plurality of types of contents are filled in the packaging bag, the contents to be taken out can be selected depending on how to open.

In the packaging bag of the present invention, one of the packaging materials includes a handle portion for hanging at the center.
If the packaging bag is configured in this way, the packaging bag can be easily carried without spilling the contents even after opening.

Moreover, the packaging bag of this invention is set as the structure in which the said other packaging material is provided with the partition part which partitions the inside of a packaging bag into plurality.
If a packaging bag is comprised in this way, since different types or the same kind of contents can be divided and filled, it is possible to prevent the contents from being biased or mixed.

  According to the present invention as described above, it is easy to open along the inside of the edge seal while allowing either one of the front and back packaging materials to be opened and enabling opening with a wide opening. By forming the portion, it is possible to intuitively recognize the opening method while having excellent opening properties.

  First, the material used for the packaging bag of this invention and various processes are demonstrated. However, since the edge seal uses a general heat seal process, detailed description is omitted.

  There is no restriction | limiting in particular as a packaging material used for the packaging bag of this invention. Examples of the resin material suitable for constituting the packaging material include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly4-methylpentene-1, low-, medium-, Or polyolefins such as high-density polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer); polystyrene, styrene-butadiene copolymer Aromatic vinyl copolymers such as polyvinyl chloride, vinyl halide polymers such as vinylidene chloride resin; nitrile polymers such as acrylonitrile-styrene copolymer, acrylonitrile-styrene-butadiene copolymer; nylon 6, nylon 66 , Polyamides such as para or metaxylylene adipamide Polyethylene terephthalate, polyesters polytetramethylene terephthalate; various polycarbonates; polyacetals such as polyoxymethylene; can be exemplified thermoplastic resins such as a biodegradable resin. A packaging material made of these materials is used after being unstretched, uniaxially stretched, or biaxially stretched.

  Furthermore, the packaging material used for the packaging bag of the present invention can be constituted by a single layer of these packaging materials, or by laminating two or more kinds, and one or two of these packaging materials. It can also be configured by adhering a seed or more and a metal foil such as aluminum, a vapor deposition film of metal or metal oxide, paper, cellophane and the like. Preferred packaging materials include, for example, a stretched nylon film as an outer layer, a two-layer configuration having a polyolefin film such as low-density polyethylene and polypropylene as an inner layer, a stretched polyester film as an outer layer, and a two-layer configuration having a polyolefin film as an inner layer, and Among these, a film having a three-layer structure in which a metal foil such as aluminum is laminated between outer layer films, and the like are included. In the production of these laminated films, an adhesive and an anchor agent are interposed between the respective layers as necessary. You can also.

  The layer structure of the packaging material is selected according to the cost of the packaging bag and the properties of the contents to be filled. For example, in the case of a packaging bag that requires low cost, use a laminated film having a two-layer structure, and in the case of a packaging bag that requires storage stability, use a laminated film having a three-layer structure or more including aluminum foil. It ’s fine.

The easy-opening process of the present invention is a weakening process that facilitates tearing a specific part of the packaging material, and is performed, for example, by forming a plurality of scratches or one or more scores in the specific part of the packaging material.
The scratches and scores formed on the packaging material may be known per se. For example, as the form of the scar, it has a dot shape, a dotted line shape, a linear shape (short line shape, long line shape), a pattern having a river character shape, a square shape, an X shape, or a mixture of these. It may be what you are doing.

  Further, the depth of the scars and the score does not penetrate through the packaging material, and the interval between the scars is such that the average distance between the adjacent scars is within 3 mm, preferably within 2 mm. The layer of the packaging material forming the scars and the score is not particularly limited, and there is no distinction between the outer layer, the intermediate layer, and the inner layer.

  As a method of forming scratches and scores on the packaging material, processing with a disk-shaped or roll-shaped grindstone, processing with a disk-shaped or roll-shaped tool having a plurality of protrusions or cutting edges on the surface, a speed difference between the tool and the packaging material Scratch-like processing to be performed, point-like or linear laser processing using a kaleidoscope, a laser marker, or the like is appropriately employed.

  The easily peelable seal process of the present invention is a seal process that makes it easy to peel off a specific part of the packaging material. The heat seal strength suitable for an easily peelable seal varies depending on the material of the packaging material and the use of the packaging container, but generally from 0.1 kg to 3 kg, more preferably 0, per 15 mm width in terms of bag breaking strength and openability. .2kg or more and 2kg or less is desirable. The heat seal width is preferably 2 mm or more and 80 mm or less, more preferably 3 mm or more and 50 mm or less.

  Various methods can be used for easily peelable sealing. For example, a method of adjusting the seal strength by using a heat-sealable resin as a polymer blend, a method of adjusting the seal strength according to heat seal conditions, a method of adjusting the seal strength by controlling the shape of the heat seal head (for example, point seal), etc. There is.

[First embodiment]
Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing a packaging bag according to the first embodiment of the present invention.
As shown in this figure, the packaging bag A uses two front and back packaging materials 1 and a single gusset member 2 made of the same material as the packaging material 1, and includes a top seal 3 and side seals 4 as edge seals. And the bottom seal 5 is applied.

The gusset member 2 is sandwiched between the front and back packaging materials 1 while being bent in an inverted V shape, and is thermocompression bonded to the front and back packaging materials 1 by the side seal 4 and the bottom seal 5. The front and back wrapping materials 1 are connected via a gusset member 2 without direct thermocompression of the lower end portions. Thereby, the lower end parts of the packaging material 1 are expanded in a cylindrical shape, and the packaging bag A can be made independent.
In the packaging bag A of the present embodiment, the contents are filled with the top seal 3 or the side seal 4 unsealed, and then the top seal 3 or the side seal 4 is heat sealed.

In the packaging bag A, the packaging material 1 on either the front or back side is used as the scheduled opening portion 1a, and opening is performed with a wide opening. Around the planned opening portion 1a, the easy opening portion 1b is formed by the above-described easy opening processing, and the opening portion 1a of the packaging material 1 is opened by tearing the easy opening portion 1b. In this embodiment, the bottom seal 5 side of the planned opening portion 1a is the opening start position, and by picking the tab 1c formed here and pulling it to the top seal 3 side, the easy-open processing portion 1b is torn, The scheduled opening portion 1a is opened in a single-opened shape.
Note that the tab 1c has a non-adhered tip for easy opening, and a tab base side is adhered by a weak seal portion (hatch portion shown in FIG. 1) in order to maintain sealing performance.

  The easy-open processing part 1 b is formed along the inside of the left and right side seals 4 and the bottom seal 5. The smaller the distance between each of the seals 4 and 5 and the easy opening portion 1b, the better, and preferably 5 mm or less. When the easy opening portion 1b is formed in this way, the seals 4 and 5 serve as opening guides, and the opening portion 1a can be smoothly opened. That is, each of the seals 4 and 5 is harder than the single packaging material 1 by heat sealing processing of two sheets, and by opening the scheduled opening portion 1a using this as a guide, it follows the easy-open processing portion 1b. Thus, the packaging material 1 can be easily and accurately torn.

FIG. 2 is an explanatory view showing a procedure for opening the packaging bag according to the first embodiment of the present invention.
As shown in this figure, when opening the packaging bag A, the packaging bag A is placed horizontally so that the scheduled opening portion 1a is on the upper side, and the tab 1c formed at the opening start position of the scheduled opening portion 1a is pulled. Wake up ((a) of FIG. 2).
Next, the tab 1c is pulled in the direction of the top seal 3 while holding the packaging bag A with the other hand. Thereby, the packaging material 1 is torn along the easy-opening processing part 1b, and the opening expected part 1a is opened in a single-opening shape ((b) of FIG. 2).
Thus, when the opening scheduled part 1a is opened, the whole side surface of the packaging bag A becomes an opening, and the contents can be easily taken out. Moreover, since the lower end part of the packaging bag A is a three-dimensional shape that can stand on its own, in the opened state, the packaging material 1 on the back surface is curved in a concave shape, and the packaging bag A has a tray shape.

  According to the packaging bag A of the first embodiment configured as described above, either the front or back of the packaging material 1 is set as the scheduled opening portion 1a, and the packaging bag A is opened to secure a wide opening. The contents can be easily taken out, and the cost can be reduced by eliminating the need for a resin tray.

In addition, since the easy opening portion 1b is formed along the inside of the side seal 4 and the bottom seal 5, the seals 4 and 5 serve as opening guides, and good opening properties can be realized.
Moreover, since the inside of each seal | sticker 4 and 5 is a position where it is visually recognizable visually, there also exists an advantage that the opening method can be recognized intuitively.
Further, since the opening operation tab 1c of the planned opening portion 1a is formed with the opening operation tab 1c, not only the opening start position is clarified but also the opening operation can be easily performed with the tab 1c. it can.

Moreover, in the packaging bag A, since the lower end parts of the packaging material 1 are connected so that expansion is possible via the gusset member 2, the packaging bag A can become independent. As a result, display at the time of sale becomes easy, and a large number of packaging bags A can be displayed in a small space.
Moreover, since the packaging bag A is three-dimensional and the form after opening becomes a tray shape, there is an advantage that the contents are not easily overflowed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals are given to parts common to the embodiment, and the description of the embodiment is used.
FIG. 3 is a front view showing the packaging bag according to the second embodiment of the present invention.

In the packaging bag B shown in this figure, the opening start portion of the planned opening portion 1a is joined to the gusset member 2 (or the packaging material 1 on the back side) by the above-described peelable seal 6, and the tab 1c is packaged. The point which is extended and formed in the lower end of the bag B is different from the said embodiment.
Specifically, an intermediate portion of the bottom seal 5 is an easily peelable seal 6, and easy-open processed portions 1b are formed on both sides thereof. The tab 1c is formed so as to extend downward from the easy-open processing portion 1b, and is stored in a folded shape in an unsealed state.

FIG. 4 is an explanatory view showing a procedure for opening the packaging bag according to the second embodiment of the present invention.
As shown in this figure, when opening the packaging bag B, the packaging bag B is placed horizontally so that the scheduled opening portion 1a is on the upper side, and the tab 1c stored in a folded shape is raised (( a)).
Next, the tab 1c is pulled in the direction of the top seal 3 while holding the packaging bag B with the other hand. As a result, the easily peelable seal 6 is peeled off, the packaging material 1 is torn along the easy opening portion 1b, and the planned opening portion 1a is opened in a single-opened shape ((b) of FIG. 4).

According to the packaging bag B of the second embodiment configured as described above, since the opening start portion of the scheduled opening portion 1a is joined to the gusset member 2 by the easily peelable seal 6, the opening of the scheduled opening portion 1a The opening start part can be easily peeled off and the opening operation can be performed.
Further, since the tab 1c is housed in an unsealed state in a folded shape, the tab 1c does not get in the way before opening, and the tab 1c can be easily raised at the time of opening.

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals are given to parts common to the embodiment, and the description of the embodiment is used.
FIG. 5 is a front view showing a packaging bag according to the third embodiment of the present invention.

The packaging bag C shown in this figure has a point that the upper end portion and the lower end portion have a self-supporting shape, a point that the gusset member 2 (or the packaging material 1 on the back side) includes a hanging tab 2a that overlaps with the tab 1c, The tab 1c (suspending tab 2a) is different from the second embodiment in that the tab 1c (suspending tab 2a) is provided with a finger hooking hole 1d (suspending hole 2b).
Specifically, tabs 1 c and 2 a are extended and formed at the lower ends of the packaging material 1 and the gusset member, and these are joined by an easily peelable seal 6. However, the tip portions of the tabs 1c and 2a are in an unsealed state in order to facilitate peeling.

FIG. 6 is an explanatory view showing a procedure for opening the packaging bag according to the third embodiment of the present invention.
As shown in this figure, when opening the packaging bag C, the packaging bag C is placed horizontally so that the scheduled opening portion 1a is on the upper side, and the tab 1c is peeled off from the hanging tab 2a ((a of FIG. 6 )).
Next, while pressing the packaging bag C with the other hand, the finger is put on the finger hooking hole 1d of the tab 1c and pulled in the direction of the top seal 3. As a result, the easily peelable seal 6 is peeled off, the packaging material 1 is torn along the easily opened portion 1b, and the scheduled opening portion 1a is opened in a single-open shape ((b) in FIG. 6).

  According to the packaging bag C of the third embodiment configured as described above, since the upper end and the lower end have a self-supporting shape, the shape at the time of opening becomes closer to the tray and prevents overflow of the contents. Can do.

Moreover, in the packaging bag C of 3rd embodiment, since the gusset member 2 is provided with the suspension tab 2a superposed on the tab 1c, the packaging bag C can be suspended. Thereby, the display at the time of sale becomes easy, and many packaging bags C can be displayed in a small space.
Moreover, by superposing the tab 1c and the suspension tab 2a, it is possible to avoid the packaging bag C from being suspended only by the tab 1c and to prevent the unsealing due to the suspension load.
In addition, since the tab 1c is formed with the finger hooking holes 1d, the ease of opening can be further enhanced.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals are given to parts common to the embodiment, and the description of the embodiment is used.
FIG. 7 is a perspective view showing a packaging bag according to the fourth embodiment of the present invention.

In the packaging bag D shown in this figure, the scheduled opening portion 1a is divided at the central portion and opened in a double-sided manner, and the front packaging material 1 has a handle portion 1e for suspension at the central portion. Is different from the third embodiment.
Specifically, the overlapping portion is raised at the center of the packaging material 1, heat-sealed around it to form the handle portion 1e, and the easy-open processing portion 1b is formed along the inside thereof. Is tab 1c. Further, the pair of tabs 1c to be polymerized are joined together by an easily peelable seal 6 to form a finger hooking hole 1d at the center.

FIG. 8 is an explanatory view showing a procedure for opening the packaging bag according to the fourth embodiment of the present invention.
As shown in this figure, when opening the packaging bag D, the packaging bag D is placed horizontally so that the scheduled opening portion 1a is on the upper side, and the polymerized tab 1c is peeled off ((a) of FIG. 8).
Next, while pressing the packaging bag D with the other hand, a finger is put on the finger hooking hole 1d of one tab 1c and pulled in the top seal 3 direction or the bottom seal 5 direction. Thereby, the packaging material 1 is torn along the easy-opening processing part 1b, and one opening plan part 1a is opened ((b) of FIG. 8).
After that, the finger is put on the finger hooking hole 1d of the other tab 1c and pulled in the top seal 3 direction or the bottom seal 5 direction. Thereby, the other opening plan part 1a is opened, and it becomes a double door opening ((c) of FIG. 8).

According to the packaging bag D of the fourth embodiment configured as described above, the unscheduled opening portion 1a is divided at the central portion and opened in a double-opening manner, so that only one unscheduled opening portion 1a is opened. And it becomes possible to select the state which opened both the opening scheduled parts 1a.
Further, when a plurality of types of contents are filled in the packaging bag D, it is possible to select the contents to be taken out depending on how to open.
Further, the packaging bag D of the fourth embodiment has a packaging bag D without spilling the contents even after opening since one of the packaging materials 1 is provided with a handle portion 1e for hanging at the center. Can be carried easily.

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG. However, the same reference numerals are given to parts common to the embodiment, and the description of the embodiment is used.
FIG. 9 is a perspective view showing an opened state of the packaging bag according to the fourth embodiment of the present invention.

The packaging bag E shown in this figure is different from the fourth embodiment in that the packaging material 1 on the back side includes a partition portion 1f that partitions the inside of the packaging bag.
Specifically, the partition portion 1f is formed by raising a superposed portion at the center of the packaging material 1 on the back side and applying heat sealing thereto.
According to the packaging bag E of the fifth embodiment configured as described above, since different types or the same types of contents can be divided and filled, it is possible to prevent the contents from being biased or mixed.

It is a front view which shows the packaging bag which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the opening procedure of the packaging bag which concerns on 1st embodiment of this invention. It is a front view which shows the packaging bag which concerns on 2nd embodiment of this invention. It is explanatory drawing which shows the opening procedure of the packaging bag which concerns on 2nd embodiment of this invention. It is a front view which shows the packaging bag which concerns on 3rd embodiment of this invention. It is explanatory drawing which shows the opening procedure of the packaging bag which concerns on 3rd embodiment of this invention. It is a perspective view which shows the packaging bag which concerns on 4th embodiment of this invention. It is explanatory drawing which shows the opening procedure of the packaging bag which concerns on 4th embodiment of this invention. It is a perspective view which shows the unsealed state of the packaging bag which concerns on 5th embodiment of this invention.

Explanation of symbols

A to E Packaging bag 1 Packaging material 1a Opening scheduled part 1b Easy opening processing part 1c Tab 1d Finger hooking hole 1e Handle part 1f Partition part 2 Gusset member 2a Hanging tab 2b Hanging hole 3 Top seal 4 Side seal 5 Bottom seal 6 Easy Peelable seal

Claims (11)

A packaging bag formed by applying edge seals to the front and back packaging materials,
A packaging bag characterized in that either one of the front and back packaging materials is used as a portion to be opened, and an easy-open processing portion is formed along the inside of the edge seal.   The packaging bag according to claim 1, wherein lower end portions and / or upper end portions of the packaging material are connected to each other via a gusset member so as to be expandable.   The packaging bag according to claim 1 or 2, wherein an opening start portion of the planned opening portion is joined to the other packaging material or the gusset member by an easily peelable seal.   The packaging bag according to any one of claims 1 to 3, wherein the opening start portion of the planned opening portion includes a tab for opening operation.   5. The packaging bag according to claim 4, wherein the tab is stored in an unsealed state in a folded shape.   The packaging bag according to claim 4, wherein the tab includes a finger hooking hole.   The packaging bag according to any one of claims 1 to 6, wherein the opening-scheduled portion is opened in a single-open shape.   The packaging bag according to claim 7, wherein the other packaging material or the gusset member is provided with a hanging tab that overlaps with the tab.   The packaging bag according to any one of claims 1 to 6, wherein the scheduled opening portion is divided at a central portion and opened in a double-page spread.   The packaging bag according to claim 9, wherein one of the packaging materials includes a handle portion for hanging at the center.   11. The packaging bag according to claim 9, wherein the other packaging material includes a partition portion that partitions the interior of the packaging bag into a plurality of parts.

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