JP2011084277A - Easily unsealable packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily unsealable packaging bag which is such a packaging bag as a three-way type sealing bag, a four-way type sealing bag, and a standing pouch in which a turned-up tape is inserted into the bottom, and which is easily unsealed, has a stable width of opening and prevents the leakage of a content. <P>SOLUTION: The easily unsealable packaging bag is characterized in that at least two half-cut lines are provided by dividing two ways from an intersection existing in the peripheral heat-sealed part on one end of a predetermined unsealing line and reaching the peripheral heat-sealing part on the opposite end of the predetermined unsealing line so as to pinch the predetermined unsealing line of the easily unsealable packaging bag, and a notch for starting unsealing or the direction of its extending line are provided at the peripheral heat-sealing part on the opposite end of the predetermined unsealing line so as to penetrate between the tips of two half-cut lines. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention is a three-side seal bag made of a laminated resin film, a four-side seal bag, or a planned opening portion of a packaging bag such as a standing pouch inserted with a folded tape at the bottom, which contains seasonings, foods, refill detergents, etc. It relates to an easy-open packaging bag 20 provided with a half-cut line 3 and a notch 2 for starting opening.

  Conventionally, seasoning and confectionery are easily stored, one film is folded back, a three-side sealed bag with three sides sealed, and two pieces of film containing confectionery and foods are stacked and sealed on four sides. A four-sided seal bag, or a standing pouch with a folded tape inserted at the bottom for accommodating toiletry products such as refill detergents, is used.

  Then, the packaging bag is provided with a notch 2 for opening start at the peripheral heat-sealing part 1 at one end of the opening-scheduled part, or at each of the peripheral heat-sealing parts 1 at both ends of the opening-scheduling part. An easy-open packaging bag 20 made of a laminated resin film as shown in FIG.

  Further, in order to further facilitate the opening of the packaging bag made of the laminated resin film, the opening notch 2 provided in the peripheral heat sealing portion 1 as shown in FIG. 3 and one or a plurality of linear halves are provided. An easy-open packaging bag 20 made of a laminated resin film provided with a cut line 3 is used.

  Furthermore, a V-shaped half-cut line 3 in which the opening portion faces the direction of the notch 2 for starting opening on the extension line of the opening-starting notch 2 provided in the peripheral heat-sealed portion 1, and a V-shaped half-cut An easy-open packaging bag 20 made of a laminated resin film of FIG. 4 provided with a half-cut line 3 that is continuous with the line 3 in the opposite direction, or is opened toward a bifurcated half-cut line 3 and a bifurcated width. An easy-open packaging bag 20 made of a laminated resin film of FIG. 5 provided with a starting cut 2 is known.

  Known documents are shown below.

JP 2006-117263 A JP 2001-233355 A JP 2006-225001 A JP 2001-180690 A Japanese Patent Laid-Open No. 2002-2790

In the case of a packaging bag in which one straight half-cut line 3 is provided at the end of the opening notch 2, when the position of the opening 2 is shifted, the opening line is placed on the half-cut line 3. Not
Easy openability cannot be obtained. Providing a plurality of half-cut lines 3 is considered to be an effective means for obtaining a stable easy-opening property when any one of the plurality of half-cut lines 3 serves as a guide during opening.

  However, the film constituting the packaging bag is a laminated resin film in which a base material layer made of a hard stretchable film such as a stretched film and a stretchable sealant layer made of an unstretched film are bonded together. The base material layer that has been cut by half-cut processing may peel off and fall into the contents, which may cause a problem of foreign matter contamination.

  Also, an easy-open packaging bag 20 made of a laminated resin film provided with a V-shaped half-cut line 3 and a half-cut line 3 that is continuous with the V-shaped half-cut line 3 in the opposite direction, or bifurcated In the easy-open packaging bag 20 made of a laminated resin film provided with the half-cut line 3, the intersection 9 of the half-cut line 3 which is continuous with the V-shaped half-cut line 3 and goes in the opposite direction, or bifurcated An intersection 9 of the half-cut lines 3 is provided in an inner unsealed part surrounded by the peripheral heat sealing part 1.

  Therefore, if the force is not applied evenly to each of the two front and back laminated resin films when tearing and opening, the sealant layer of the laminated resin film to which one of the two forces is applied stretches and has a good easy opening property. I can't get it.

  In addition, when the pouring path 4 is tapered by the heat sealing portion with a refilling standing pouch or the like, the opening width of the spout portion may become wide, which may cause a problem in workability at the time of refilling. .

  Furthermore, at the intersection 9 described above, the energy of laser irradiation becomes excessive, which may cause a serious drawback of leaking the contents through the film, and to improve the retention of the opening in the dispensing path 4 When embossing is performed, the intensity of the laser beam is increased and the film is likely to penetrate at the intersection 9. The prior art has the above-mentioned problems.

  An object of the present invention is to provide an easily openable packaging bag 20 that improves these problems, can be easily opened, has a stable opening width, and does not leak the contents.

  The present invention has been made in view of the above problems, and the invention of claim 1 is an easy-open packaging bag 20 having a peripheral heat sealing portion 1 in which a laminated resin film is overlapped and the peripheral portion is heat sealed, At least two half-cut lines 3 so as to sandwich the planned opening line of the easy-open packaging bag, divided into two forks from the intersection 9 in the peripheral heat sealing part 1 around one end of the planned opening line, around the opposite end of the planned opening line It is provided so as to reach the heat-sealing portion 1, and the direction of the notch 2 for opening opening or the extension line thereof is between the tips of the two half-cut lines 3 in the peripheral heat-sealing portion 1 at the opposite end of the planned opening line. The easy-open packaging bag 20 is provided with a notch 2 for opening opening so as to enter.

  By adopting the above-described configuration, when tearing from the notch 2 for opening opening with the top and bottom of the notch 2 for opening opening, it is torn along one of the two half-cut lines 3, and can be easily opened and stable. Can be obtained. Further, the intersection 9 that is divided into two branches is strongly irradiated with the laser, but is in the peripheral heat sealing portion 1, so even if the intersection 9 becomes thin when the half-cut line 3 is provided by the laser, it is difficult to penetrate and temporarily penetrates. The contents will not leak.

The invention of claim 2 of the present invention is the invention of claim 1, wherein the easy-open packaging bag 20
However, it is the easy-open packaging bag 20 which has the extraction channel | path 4 formed by the heat sealing part in the upper corner, and is provided so that the said opening schedule line may traverse the extraction channel | path 4. FIG.

  In said structure, since the opening width of the extraction channel | path 4 is stabilized further, when using it for the refilling use, it can insert in the opening | mouth of a bottle easily, and there is no fear of spilling.

  The invention of claim 3 of the present invention is the easy-open packaging bag 20 characterized in that the embossed 8 is provided on the laminated resin film of the pouring path 4 in the invention of claim 2.

  Furthermore, even if the embossed 8 is provided on the laminated resin film of the pouring path 4, when the half-cut line 3 is provided by a laser, the distance between the laminated resin film and the laser gun is reduced by the embossed 8, and the strength of the laser is reduced. Even if it changes, the intersection 9 that is divided into two branches is strongly irradiated with the laser, but it is in the peripheral heat sealing part 1, so even if the intersection 9 becomes thin when the laser is provided with the half-cut line 3, it is difficult to penetrate. Even if it penetrates, the contents will not leak.

  The easy-open packaging bag 20 of the present invention can be easily opened, the opening width is stable, and the contents do not leak. Moreover, even if the easy-open packaging bag 20 is a standing pouch provided with the pouring path 4, the opening width is stable, and therefore it is easy to insert the pouring path 4 into the mouth of the bottle when refilling. Furthermore, even if the embossing 8 is provided in the pouring path 4, the intersection 9 that is divided into two branches is provided in the peripheral heat sealing portion 1, so that it is difficult to penetrate by laser processing, and even if it penetrates, the contents leak. There is no.

It is explanatory drawing which showed in plan the example of the easy-open packaging bag 20 of this invention. It is explanatory drawing which showed the easy-open packaging bag 20 which provided the cutting 2 for the opening start to the peripheral heat sealing part 1 of a prior art by the plane. It is explanatory drawing which showed the easy-open packaging bag 20 which provided the notch 2 for opening start in the peripheral heat sealing part 1 of a prior art, and provided the half cut line 3 in the opening scheduled part. A conventional open-sealed packaging bag is provided with a notch 2 for opening opening in the peripheral heat-sealed portion 1 of the prior art, a half-cut wire 3 is provided in a planned opening portion, and an end portion of the half-cut wire 3 is opened in a V shape. It is explanatory drawing shown. An openable packaging bag is shown in a plan view in which a peripheral heat sealing part 1 of the prior art is provided with a notch 2 for starting opening, a half-cut line 3 is provided in a part to be opened, and an end part of the half-cut line 3 is opened in two. It is explanatory drawing. It is explanatory drawing which showed the comparative example 1 of the prior art by the plane. It is explanatory drawing which showed the comparative example 2 of the prior art by the plane. It is explanatory drawing which showed the comparative example 3 of the prior art by the plane.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is an explanatory view showing an example of the easy-open packaging bag 20 of the present invention in a plan view.
As shown in FIG. 1, the easy-open packaging bag 20 of the present embodiment is a standing pouch composed of two body films and a bottom film 5 folded in two. The bottom film 5 folded in half is inserted below the two body films with the folded part up.

  The left and right ends of the easy-open packaging bag 20 are formed with side heat-sealing portions 11. In the upper part where the bottom film 5 is not provided, the two body films are heat-sealed. In the lower part where the bottom film 5 is present, the bottom film is provided. 5 and the body film are heat sealed.

  A cutout 6 is provided on the upper left side of the easy-open packaging bag 20, the body film along the cutout 6 is also heat sealed, and the left and left side heats of the heat seal 12 at the cutout. A pouring path 4 is formed for taking out the contents with the sealing portion 11. The leading end portion of the extraction channel 4 is continuously sealed by the heat sealing portion 12 and the side heat sealing portion 11 of the notch. An unsealed filling port 7 for filling the contents is provided between the right side of the heat sealing part 12 and the right side heat sealing part 11 of the notch.

  The pouring path 4 is provided with embosses 8 protruding outward on the front and back body films so that the pouring path 4 is not blocked during pouring.

  Furthermore, two half-cut lines 3 are provided in the pouring path 4 above and below the planned opening line for tearing the tip of the pouring path 4 and taking out the contents, and the two half-cut lines 3 are at the right end. Thus, the intersection 9 is located at the heat sealing portion 12 of the notch. The left side heat sealing part 11 is provided with a notch 2 for opening opening between two half-cut lines 3.

  In FIG. 1, the half-cut line 3 is provided on the planned opening line from the intersection 9 toward the right end of the heat-sealed portion 12 of the notched portion having the intersection. As another shape, the half-cut line 3 extending from the intersection 9 toward the right end of the notch 6 and the heat-sealing part 12 having the intersection is formed as two half-cut lines obtained by extending the two half-cut lines 3. Also good. The half-cut line 3 is also provided at the same position on the back body film.

  The laminated resin film constituting the easy-open packaging bag 20 of the present invention is formed by laminating and laminating at least an outer base layer and a sealant layer, and the base layer is often a stretched resin film, Examples of the base material layer include biaxially stretched nylon film (ONy), polyethylene terephthalate film (PET), polypropylene film (OPP), and vapor deposition by depositing aluminum, aluminum oxide, silicon oxide, or the like on these films. The film is appropriately selected depending on the contents to be stored and the use of the bag.

  As the innermost sealant layer, heat-sealing linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE) and other polyethylene films or unstretched polypropylene film (CPP) Etc.

  Further, for the purpose of protecting the contents between the base material layer and the sealant layer, for example, an ethylene / vinyl alcohol copolymer resin film (EVOH) for the purpose of gas barrier properties, aluminum, aluminum oxide, silicon oxide or the like is used. A vapor-deposited film or aluminum foil, or a biaxially stretched or unstretched nylon film is laminated via an adhesive or the like for the purpose of bending pinhole resistance. A resin film can be used.

As a method of laminating a laminated resin film, a dry resin laminating method is used to attach it to a base material layer, or an extrusion laminating method is used to extrude a molten resin into a band shape, which is then laminated on the base material layer to create a laminated resin film. can do.

  The sealant layer surfaces of the laminated resin film are made to face each other and the periphery is heat sealed to form a bag shape, thereby forming an easy-open packaging bag 20.

  There are V notch, I notch, or turtle saw notch, etc., in the opening notch 2 to be applied to the peripheral heat sealing portion 1 of the easily openable packaging bag 20 having the above-described configuration, and these are appropriately selected and used. Can do.

  A laser is used to form the half-cut line 3, and examples of the laser include a carbon dioxide laser, a YAG laser, and an excimer laser used for laser processing. Among these lasers, in particular, a carbon dioxide laser having a wavelength of 10.63 μm (infrared rays) that is absorbed by polyethylene terephthalate, which is a base material layer serving as the outermost layer as a packaging material, or a stretched nylon film can be suitably used. In other words, carbon dioxide laser light is condensed by a condensing lens and irradiated onto the surface of the base material layer, so that the irradiated portion of the base material layer is removed by heat generation, melting, decomposition, ashing, etc. 3 can be formed.

The half-cut line 3 is provided as a straight line in FIG. 1, but may be provided as a curve. For example, the half-cut line 3 can be formed in an arc shape or a waveform curve.
The half cut line 3 may be provided as a continuous line or a broken line.

  Further, the half-cut line 3 may be further provided above or below the two half-cut lines 3 provided above and below the planned opening line. In order to obtain a plurality of half-cut lines 3, the scanning may be shifted a plurality of times. Furthermore, the half-cut line 3 can be formed from the back surface of the packaging bag using a laser.

  Specific examples of the present invention will be described below.

<Example 1>
An easy-open packaging bag 20 having the shape shown in FIG. 1 was used. That is, it is a standing pouch comprising two body films and a bottom film 5 folded in half. The bottom film 5 folded in half is inserted below the two body films with the folded part up.

  Side heat sealing portions 11 are formed at the left and right ends of the easy-open packaging bag 20, and the two body films are heat sealed above the bottom film 5, and the bottom film is present below the bottom film 5. 5 and the body film are heat sealed.

  A cutout 6 is provided on the upper left side of the easy-open packaging bag 20, the body film along the cutout 6 is also heat sealed, and the left and left side heats of the heat seal 12 at the cutout. A pouring path 4 (5) is formed for taking out the contents with the sealing portion 11. The leading end portion of the extraction channel 4 is continuously sealed by the heat sealing portion 12 and the side heat sealing portion 11 of the notch. An unsealed filling port 7 for filling the contents is provided between the right side of the heat sealing part 12 and the right side heat sealing part 11 of the notch.

  The pouring path 4 is provided with embosses 8 protruding outward on the front and back body films so that the pouring path 4 is not blocked during pouring.

Further, the cutout path 4 is provided with a half cut line 3 above and below the planned opening line for tearing the tip of the discharge path 4 and taking out the contents, and the half cut line 3 is a heat seal of the notch. It is divided into two forks from the intersection 9 in the section 12, crosses the pouring path 4, and reaches the left side heat sealing section 11. From the intersection 9 toward the end of the heat-sealed portion 12 of the notched portion at the intersection, the half cut line 3 is provided on the planned opening line.

  The notch 2 for opening is provided between the two half-cut lines 3 of the left side heat sealing part 11. The half-cut line 3 is also provided at the same position on the back body film.

  The embossing 8 is formed by sandwiching and pressing each film between a male mold and a female mold before superimposing the front film and the back film in bag making. At this time, the film or mold may be heated.

  The dimensions of the easy-open packaging bag 20 are 140 mm in width, 210 mm in height, and the folding width of the bottom film 5 is 35 mm.

The body film and the bottom film 5 were laminated resin films having the same layer structure. The layer structure is as follows.
Deposition PET / ONY / LLDPE
Deposition PET: manufactured by Toppan Printing Co., Ltd., aluminum oxide deposition film (GL-ARH) 12 μm
ONY; manufactured by Unitika Ltd., biaxially stretched nylon (ONMB-RT) 15 μm
LLDPE; Tamapoly Corporation, linear low density polyethylene (DS-2C) 100 μm
Each film is bonded by a dry laminating method using an adhesive.

  Hereinafter, comparative examples of the present invention will be described.

<Comparative Example 1>
As shown in FIG. 6, only the shape of the half-cut line 3 is divided into two forks at the left end of the half-cut line 3 as shown in FIG. The easy-open packaging bag 20 in which the position of the branching intersection 9 is provided in the unsealed portion inside the left side heat sealed portion 11 is referred to as Comparative Example 1.

<Comparative Example 2>
As shown in FIG. 7, only one half-cut line 3 has the same shape and the same material as the easy-open packaging bag 20 of Example 1 and shows only the positional relationship between the shape of the half-cut line 3 and the notch 2 for opening opening. Comparative Example 2 is an easy-open packaging bag 20 that is provided in a straight line without being bifurcated and is provided with a notch 2 for opening opening continuously to the half-cut line 3.

<Comparative Example 3>
As shown in FIG. 8, there are three half-cut lines 3 having the same shape and the same material as the easy-open packaging bag 20 of Example 1 and only the positional relationship between the shape of the half-cut line 3 and the notch 2 for opening opening. The easy-open packaging bag 20 provided in parallel and provided so that the leading end of the opening notch 2 was placed between the upper and lower half-cut lines 3 was used as Comparative Example 3.

  About the easy-open packaging bag 20 of Example 1 and Comparative Examples 1 to 3, the opening width and the openability were experimentally evaluated.

<Opening width>
Each of the easy-open packaging bags 20 of Example 1 and Comparative Examples 1 to 3 was filled with 400 g of water, and the easy-open packaging bags 20 in which the filling port 7 was heat-sealed were cut into 10 monitors each for starting opening. I had the top and bottom of 2 tear open. The length from the boundary between the side heat-sealed portion 11 and the unsealed portion to the boundary between the unsealed portion and the notched heat-sealed portion 12 was measured as the opening width at the torn portion of the extraction channel 4. (Unit: mm) The length from the boundary between the side heat-sealed portion 11 and the unsealed portion of the half-cut line 3 along the planned opening portion to the boundary between the unsealed portion and the notched portion of the heat-sealed portion 12 Is 18.3 mm, and it is considered that the larger the difference from this, the farther from the half-cut line 3 and the poorer the opening. Table 1 shows the average of the results of 10 bags each measured.

<Cutability>
Ten easy-open packaging bags 20 of Example 1 and Comparative Examples 1 to 3 were each pulled, and the portion above the opening opening notch was pulled vertically from the main body portion of the easy-open packaging bag 20 with a tensile tester. The force (unit: N) at that time was defined as the cut property. Table 1 shows the average value and the maximum and minimum values.

以下に実施例と比較例との比較結果について説明する。

Below, the comparison result of an Example and a comparative example is demonstrated.

<Comparison result>
In Comparative Example 1, the opening width is not so large and is relatively good, but it is difficult to open the cut property. Moreover, since the position of the intersection 9 that branches into the fork of the half-cut line 3 is provided in the unsealed part inside the left side heat-sealed part 11, when the half-cut line 3 is provided by laser processing, At the intersection 9 of the cut line 3, the energy of the laser is excessive, and it is easy to penetrate the film, which may cause liquid leakage.

  In Comparative Example 2, when the opening width is increased and refilling is performed, it is difficult to insert the bottle into the mouth of the bottle to be refilled. Also, if the tear direction deviates from the half-cut line 3 at the time of opening, it is difficult to tear and difficult to open.

  In Comparative Example 3, the opening width is larger than that in Example 1, and the cutability is difficult to open, resulting in poor workability. Also, when tearing from the opening cut, it can be torn at any of the three half-cut lines 3, but it is good to tear at the same half-cut line 3 on the front and back films, but at different positions on the front and back If it is torn at the half-cut line 3, the pouch may be difficult to be torn. In addition, the resin of the sealant layer may be stretched to make a beard-like cut.

  In Example 1, problems such as those occurring in the easy-open packaging bag 20 of Comparative Examples 1 to 3 did not occur, and the bag could be easily opened and the opening width was stable. In addition, since the intersection 9 of the half-cut line 3 is in the heat-sealed portion 12 of the cut-out portion, there is no risk of serious defects such as penetrating the film due to excessive laser irradiation energy and leaking the contents, so you can rest assured. Can be used.

DESCRIPTION OF SYMBOLS 1 ... Peripheral heat sealing part 11 ... Side part heat sealing part 12 ... Heat sealing part 2 of a notch part ... Notch 3 for opening start ... Half cut wire 4 ... Extraction path 5 ... Bottom film 6 ... Notch 7 ... Filling port 8 ... Emboss 9 ... Base point 20 ... Easy-open packaging bag

Claims (3)

  An easy-open packaging bag having a peripheral heat-sealed portion where the laminated resin films are overlapped and the peripheral portion is heat-sealed, and at least two half-cut lines are opened so as to sandwich the planned opening line of the easy-open packaging bag It is divided into two branches from the intersection at the peripheral heat sealing part at one end of the planned line and reaches the peripheral heat sealing part at the opposite end of the planned opening line for opening the opening at the peripheral heat sealing part at the opposite end of the planned opening line The easy-open packaging bag is characterized in that a notch for opening is provided so that the direction of the notch or its extension line is between the ends of the two half-cut lines.   The said easily openable packaging bag has the extraction channel | path formed by the heat sealing part in the upper corner, and the said opening expected line is provided so that a extraction channel | path may be crossed. Easy-open packaging bag.   The easy-open packaging bag according to claim 2, wherein an emboss is provided in the laminated resin film of the extraction path.

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