JPH09132249A - Packaging bag and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag which can be easily opened by hand, and in addition, for which the opening can be surely performed to the end, and its manufacturing method. SOLUTION: A packaging bag 1 is a packaging body for which both side edge parts of a sheet consisting of a laminated film with a heat-bondable resin film, are affixed into a hut-sealed state with the above mentioned heat-bondable film being inside to fop a body part 2 into a cylindrical shape with a back sealed part 3, and the opening end of the body part 2 is sealed 4. Then, at an area of one side end of the body part 2, an incision 5 for opening is provided, and at the same time, at least two breakable lines 6 in parallel, which do not go through to the internal surface side, are provided from the vicinity of the incision 5 extending to the approx. total periphery of the body part 2, on the peripheral surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for confectionery and the like and a manufacturing method thereof, and more particularly to a packaging bag which can be easily opened and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, a flexible sheet material made of a laminated film such as a synthetic resin film has been widely used as a soft packaging material.

However, since such a soft packaging material has high tear strength, it is difficult to open it by hand. In the case of a packaging bag formed by pasting such a soft packaging material by heat sealing, the contents are taken out. In that case, there is a disadvantage that the cutter must be opened using a cutter or scissors, so that a packaging container that can be easily opened by hand has been demanded.

As such a conventional technique, for example, a packaging bag in which a V-shaped notch or an I-shaped notch for facilitating the start of tearing is provided on the side edge of the packaging bag so that the opening can be easily performed by hand. It is known that in the case of such a packaging container, if you actually try to open it by hand, the problem that it will tear to the end even if it tears halfway is likely to occur. ) Is difficult to tear.

Further, when a tearable packaging material such as a uniaxially stretched polyethylene film is used, the cost of the packaging material increases, and the tearing direction is taken into consideration when processing such a packaging material into a container. The disadvantage is that the material must be processed.

Further, a roller having a fine uneven surface is pressed against the entire surface of the packaging material to form fine holes on the surface of the resin film by roughening (for example, Japanese Patent Laid-Open No. 4-2499).
Japanese Patent Laid-Open Publication No. 2003-242242), a method of improving tearability is known. However, according to this method, since the entire surface of the packaging material is roughened, the printed appearance is extremely deteriorated and the barrier property of the packaging material is also deteriorated.

Further, the above-described roughening is applied to a part of the packaging material rather than the entire surface, for example, a rough surface is formed on a portion such as a bent portion (opening start portion) of a packaging bag and a back-applied seal portion which is particularly difficult to tear. A processing method is known (see Japanese Patent Laid-Open No. 64-36435). However, in this method, there is a problem in that the portion that is not roughened is not easily torn and cannot be opened neatly.

Furthermore, a method is also known in which a large number of cut scratches (penetration scratches) are provided in the tip portion of the back sticking seal portion of the packaging bag. However, this method has a drawback that it is difficult to cut the base end portion of the back-applied seal part when the bag is opened from the back-applied seal part, and the opening method is unreasonable. Therefore, there is a possibility that the contents may be damaged if the package is forcibly opened. In addition, in the case where the back sticking seal portion of the packaging bag is processed to have a cut damage as described above, the thickness of the back sticking seal portion is increased, so that, for example, the packaging bag before being filled with the contents is wound and stored. In this case, there is a disadvantage that the length that can be wound by one roll is limited.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. The object of the present invention is to make it possible to easily open by hand and to surely open until the end. To provide a packaging bag and a manufacturing method thereof.

[0010]

In order to achieve the above-mentioned object, the packaging bag of the present invention comprises a sheet made of a laminated film having a heat-adhesive film, with both side edges of the sheet having the heat-adhesive film inside. In a packaging bag which is formed by sticking together in a tubular shape to form a tubular body and sealing both open ends thereof, a notch for opening is provided at an arbitrary part of one side end of the body and the vicinity of the notch is provided. From the above, at least two parallel break lines which do not penetrate to the inner surface side are provided on the peripheral surface over substantially the entire circumference of the body portion.

Further, in the packaging bag of the present invention, a tubular body is formed by laminating a sheet made of a laminated film having a heat-adhesive film on both side edges with the heat-adhesive film inside to form a palm-shape. Then, in a packaging bag formed by sealing both open ends thereof, a notch for opening is provided at an arbitrary part of one side end of the body portion, and the cutout is provided from the vicinity of the cut portion over substantially the entire circumference of the body portion. It is characterized in that the peripheral surface is roughened with a predetermined width.

Further, the packaging bag of the present invention is characterized in that a part of one end of the body portion is heat-sealed and sealed, and the notch for opening is provided in the sealed portion.

Further, according to the method of manufacturing a packaging bag of the present invention, at least a heat-adhesive film is provided on the inner surface of one side of a synthetic resin film having at least two parallel breaking lines penetrating the back surface at predetermined positions. A sheet made of a laminated film laminated so as to form a layer is prepared, and both side edges of the sheet are laminated in a palm-shape with the heat-adhesive film inside, and the breaking line is the joint-shaped bonding portion. Form a tubular body portion in the intersecting direction, and after sealing both open ends of the body portion, one side end of the body portion is formed on the body portion. It is characterized in that a notch for opening is provided at a substantially central position in the width direction of at least two parallel break lines.

Furthermore, according to the method of manufacturing a packaging bag of the present invention, at least a heat-adhesive film is used as an inner surface layer on the back surface of a synthetic resin film which is roughened at a predetermined position on the front surface with a predetermined width. A sheet made of a laminated film is prepared, and both side edges of the sheet are bonded in a palm-shape with the heat-adhesive film inside to form a roughened portion having a predetermined width. A tubular body is formed so as to be in a direction intersecting with the pasted part, and then, after both open ends of the body are sealed, one side end of the body is attached to the body. It is characterized in that a notch for opening is provided at a substantially central position in the width direction of the formed rough surface processed portion.

Furthermore, the method of manufacturing the packaging bag of the present invention is characterized in that the position where the notch for opening is provided is sealed by heat sealing.

[0016]

The packaging bag of the present invention has a tubular body formed by laminating a sheet made of a laminated film having a heat-adhesive film on both side edges with the heat-adhesive film on the inside in a palm shape. A notch for opening is provided at an arbitrary part of the side end, and at least 2 which is not penetrated to the inner surface of the peripheral surface from the vicinity of the notch to substantially the entire circumference of the body portion.
By providing parallel break lines in the book, when tearing from the cut, the cut line rides on any of the break lines and cuts along the break line to the end. Therefore, it can be easily opened by hand, and can be surely opened to the end. Further, since the above-mentioned breaking line is also provided in the back-applied seal portion, the back-applied seal portion can be torn without any trouble. Further, since the breaking line is provided only at the opening portion and does not penetrate to the inner surface side of the laminated film, the barrier property of the packaging material does not deteriorate.

Further, according to another aspect of the packaging bag of the present invention, a sheet made of a laminated film having a heat-adhesive film is formed by laminating both side edges with the heat-adhesive film inside as a palm-shape. A notch for opening is provided at an arbitrary portion of one side end of the cylindrical body portion, and roughening is performed on the peripheral surface of the body portion with a predetermined width from the vicinity of the notch to substantially the entire circumference of the body portion. As a result, when tearing from the cut, the cut line is cut to the end along the roughened portion having the predetermined width. Therefore, it can be easily opened by hand, and can be surely opened to the end. Further, since the back sticking seal portion is also subjected to the above-mentioned rough surface processing, the back sticking seal portion can be torn without any trouble. Furthermore, since the roughening treatment is applied only to the unsealed portion and further to the surface of the laminated film, the barrier property of the packaging material does not deteriorate.

On the other hand, in the packaging bag of the present invention, the body portion is formed by heat-sealing a sheet made of a laminated film provided with the above-mentioned breaking line or having been subjected to the above-mentioned rough surface treatment so as to form a tubular shape. Then, after filling the contents, the open end is sealed, and then a notch for opening is provided at a predetermined position. In addition, since the above-mentioned breaking line or rough surface processing can be performed in-line at the time of pattern printing on the substrate film, the number of manufacturing steps does not increase. Further, since the above-mentioned cut for opening is provided at one side end of the body portion and at the position of the fracture line formed on the body portion or substantially the center in the width direction of the roughened portion, the position where the cut is provided The accuracy of registration between the broken line and the rough surface processed portion is good.

[0019]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the packaging bag of the present invention, FIG. 2 is an enlarged plan view in the vicinity of the unsealed portion in FIG. 1, FIG. 3 is a plan view showing an example of the shape of a broken line, and FIG. Is a cross-sectional view showing one structural example of a laminated sheet of packaging material, FIG. 5 is a cross-sectional view showing another structural example of a laminated sheet of packaging material, FIG. 6 is a plan view of a laminated sheet with a break line formed, and FIG. FIG. 8 is a perspective view showing an example of an assembled state of the body of the packaging bag, and FIG. 8 is a perspective view showing another example of an assembled state of the body of the packaging bag.

As shown in FIG. 1, the packaging bag 1 of this embodiment.
Is a sheet-shaped laminated film having a heat-adhesive film, and the heat-adhesive film is placed on the inside of the sheet so that the heat-adhesive film is bonded inside to form a cylindrical body portion 2 and both open ends thereof are sealed. A packaging bag formed by forming a notch 5 for opening at one end portion of the body 2 and breaking the peripheral surface of the body 2 from the vicinity of the notch 5 over substantially the entire circumference of the body 2. A line 6 is provided. The breaking line 6 is at least two parallel breaking lines that do not penetrate through the inner surface of the sheet, and the notch 5 for opening is provided at a position substantially at the center of the breaking line 6 in the width direction. ing. In FIG. 1, reference numeral 3 denotes a bonding portion when the both side edges of the above-mentioned laminated sheet are bonded in a palm shape, that is, a back bonding seal portion. Also, 4
Indicates a sealing portion obtained by sealing the above open end by heat sealing, and is shown by hatching for convenience. The opening notch 5 is provided at that portion by heat-sealing a part of one side end of the body portion 2, and the portion where the opening notch 5 is provided heats the opening end. It is sealed at the same time when sealing and sealing.

The packaging bag 1 of this embodiment is opened by tearing from the location of the opening notch 5. When the packaging bag 1 is torn from the cut 5, the arrow A in FIG.
As shown by, the cut line rides on any of the breaking lines 6 and is cut along the breaking line 6 as it is. Therefore, it can be easily opened by hand, and moreover, it can be surely opened to the end. Further, since the breaking line 6 is also provided on the back-applied seal part 3, the back-applied seal part 3 can be torn without any inconvenience.

In the present invention, at least two breaking lines 6 need to be provided in parallel. Regarding the shape thereof, for example, as shown in FIG. Line 6a (the same figure (a)), two parallel break lines 6b (the same figure (b)) where the cuts are staggered vertically, and the ends of the respective cuts on the opening direction side are bent inward with each other 2
For example, the parallel break line 6c of the book ((c) in the figure) is used, but the shape of the break line 6 in the present invention is not limited to these shapes. When each of the cuts 6a and 6b is simply a straight break line, it is desirable that a plurality of break lines (three or more), for example, five break lines as shown in FIG. By providing the parallel break line 6d, the probability of cutting along the break line is particularly improved, so that the cut line can be cut straight along the break line to the end without deviating from the range where the break line is provided. become.

The width of the breaking line 6 is 5 m.
About m is suitable, but it is not necessary to be limited to this. Regarding the positional relationship between the breaking line 6 and the opening notch 5, the opening notch 5 is
It is provided so as to be sandwiched between the break lines 6, that is, to be within the range of the width where the break lines 6 are provided.
It is desirable that the rupture line 6 is provided at a substantially central position in the width direction.

As described above, as the packaging material constituting the packaging bag of the present invention, a sheet made of a laminated film having a heat-adhesive film is used, and such laminated sheet generally has various configurations. It is possible and depends on the type and characteristics of the contents to be stored. For example, FIG. 4 shows a specific configuration example of a laminated sheet suitable for the case where confectionery or the like is used as the content. According to the structure of the laminated sheet 20 shown in FIG. 4, the polyethylene terephthalate (PET) film 21 and the pattern printing layer 2 are arranged in this order from the top.
2, a polyethylene (PE) layer 23, and an unstretched polypropylene (PP) film 24 on the surface of which aluminum or the like is vapor-deposited are laminated, and each PET film 21 has a break line 6 in which each cut penetrates to the back surface side. Is provided. In the production of the laminated sheet 20 shown in FIG. 4, for example, a desired pattern is printed on a PET film having a thickness of 12 μm by gravure printing or the like, and at the same time, the above break line is provided at a predetermined position of the PET film. After that, molten polyethylene was extruded to a thickness of 15 μm on the printed side of the pattern, and aluminum was vapor-deposited on the surface to a thickness of 25 μm.
The unstretched PP film of 1 is attached by the sand lamination method. The above-described processing for providing a break line to the PET film can be performed in an in-line step when printing a pattern on the PET film, and the number of manufacturing steps does not particularly increase.

Further, FIG. 5 shows another specific structural example of the laminated sheet. According to the structure of the laminated sheet 20 shown in FIG. 5, the PET film 21 provided with the breaking line 6, the pattern printing layer 22, the adhesive layer 26, in this order from the top.
The aluminum foil 25, the adhesive layer 26, and the unstretched PP film 27 are laminated, and the barrier property is particularly enhanced. The laminated sheet 20 shown in FIG. 5 is produced, for example, by printing a desired pattern by gravure printing on a PET film having a thickness of 12 μm, and at the same time, PET.
After applying the above-mentioned break line at a predetermined position of the film, apply an adhesive on the pattern printing surface side to obtain a thickness of 7 μm.
The aluminum foil of m is laminated by the dry lamination method, and the same adhesive is continuously applied on top of it to obtain a thickness of 25
A μm unstretched PP film is attached by a dry lamination method.

Next, a method of manufacturing the packaging bag of the present invention will be described.

For example, a laminated sheet 20 as shown in FIG.
Laminated sheet 2 in which both side edges are bonded in a palm-shape with the heat-adhesive film (the above-mentioned unstretched PP film) inside
The tubular body portion 2 is formed such that the break line 6 provided at 0 is in a direction orthogonal to the back-sealing seal portion 3 bonded in a palm shape (see FIG. 7). The body portion 2 can be formed by a so-called gusset type in which a side portion is provided with a fold as shown in FIG. Then fill the contents,
The open end of the body 2 was heat-sealed and sealed (usually, one open end of the body 2 was sealed, then the contents were filled and the other open end was sealed). After that, a notch 5 for opening is provided at one side end of the body portion 2 and at a substantially central position in the width direction of the breaking line 6 formed on the body portion 2 (FIG. 1, FIG.
As can be seen from FIG. 2, the portion where the notch 5 is provided is sealed at the same time when the above-mentioned opening end is sealed, so that there is of course no problem in the hermeticity. ). The shape of the notch 5 may be a known shape such as an I notch or a V notch. In addition, the notch 5 for opening in this way
Is provided at one end of the body portion 2 and at a position substantially in the center of the breaking line 6 in the width direction, so that the position of the notch 5 and the breaking line 6 have good registration accuracy and are easy to manufacture. In this way, the packaging bag 1 according to the present invention as shown in FIG. 1 is completed.

FIG. 9 shows another embodiment of the packaging bag of the present invention. Instead of providing the breaking line 6 in the above-mentioned embodiment, it extends from the notch for opening to substantially the entire circumference of the body 2. The peripheral surface is roughened with a predetermined width.
By performing such rough surface processing 7, the tearability at that portion is improved, so that the cut line when tearing the unsealed portion is cut along the rough surface processed portion.
Therefore, even the packaging bag of the present embodiment can be easily opened by hand and can be surely opened to the end. As the method for performing the rough surface processing 7, for example, a method of pressing the surface of the film with a roller having a fine uneven surface or a roller wound with sandpaper, or electric discharge machining such as corona discharge or plasma discharge There are methods using means, and these methods can be arbitrarily applied in the present embodiment.

The packaging bag of this embodiment comprises a laminated film in which a barrier layer, a heat-adhesive film and the like are laminated on the back surface of a synthetic resin film which has been subjected to the above-described roughening 7 at a predetermined position on the front surface. The sheet can be used and the rest can be manufactured in the same manner as in the above embodiment.

[0031]

As described in detail above, according to the packaging bag of the present invention, both side edges of a sheet made of a laminated film having a heat-adhesive film are formed into a palm shape with the heat-adhesive film inside. A notch for opening is provided at an arbitrary portion of one side end of the tubular body formed by pasting, and the inner surface side is penetrated to the peripheral surface from the vicinity of the notch to substantially the entire circumference of the body. By providing at least two parallel rupture lines, when tearing from the cut, the cut line rides on any of the rupture lines,
As it is along the breaking line as it is, it cuts to the end,
It has an excellent effect that it can be opened easily by hand and can be surely opened to the end. Further, since the above-mentioned breaking line is also provided in the back-applied seal portion, the back-applied seal portion can be torn without any trouble. Furthermore, the breaking line is provided only at the opening location,
Moreover, since it does not penetrate the inner surface side of the laminated film, the problem that the barrier property as a packaging material is lowered does not occur.

According to another aspect of the packaging bag of the present invention, a sheet made of a laminated film having a heat-adhesive film is formed by laminating both side edges with the heat-adhesive film on the inside in a palm shape. A notch for opening is provided at an arbitrary portion of one side end of the cylindrical body portion, and roughening is performed on the peripheral surface of the body portion with a predetermined width from the vicinity of the notch to substantially the entire circumference of the body portion. By doing so, when tearing from the cut, the cut line is cut to the end along the roughened portion formed in the predetermined width, so that it can be easily opened by hand, and it can be surely opened to the end. it can. Further, since the back sticking seal part is also subjected to the rough surface processing, it can be torn even in the back sticking seal part without any trouble, and further, the rough surface processing is applied only to the unsealed portion, and further, it is laminated. Since it is applied to the surface of the film, the barrier property of the packaging material does not deteriorate.

On the other hand, according to the method for producing a packaging bag of the present invention, a sheet made of a laminated film which has been provided with the above-mentioned breaking line or which has been subjected to the above-mentioned rough surface treatment is laminated by heat sealing so as to form a tubular shape. The packaging bag of the present invention can be manufactured by forming a body part by filling the contents, filling the contents, sealing the open end, and then providing a notch for opening at a predetermined position. Further, the above-mentioned breaking line or rough surface processing can be performed inline during the pattern printing of the base film, so that the number of manufacturing steps does not increase. Since it is provided on one side end at a position approximately at the center in the width direction of the breaking line or the roughened portion formed on the body, the registration accuracy between the position where the cut is formed and the broken line or the roughened portion Good and easy to manufacture.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a packaging bag of the present invention.

FIG. 2 is an enlarged plan view of the vicinity of the unsealed portion in FIG.

FIG. 3 is a plan view showing an example of the shape of a broken line.

FIG. 4 is a cross-sectional view showing a configuration example of a laminated sheet of packaging material.

FIG. 5 is a cross-sectional view showing another configuration example of a laminated sheet of packaging material.

FIG. 6 is a plan view of a laminated sheet in which break lines are formed.

FIG. 7 is a perspective view showing an example of an assembled state of a body portion of a packaging bag.

FIG. 8 is a perspective view showing another example of an assembled state of the body of the packaging bag.

FIG. 9 is an enlarged plan view of the vicinity of the unsealing portion showing another embodiment of the packaging bag of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Body part 3 Back sticking seal part 4 Sealing part 5 Notch for opening 6 Break line 6a-6d Break line 7 Roughening 20 Laminated sheet 21 PET film 22 Pattern print layer 23 PE layer 24 Vapor-deposited non-stretched PP Film 25 Aluminum foil 26 Adhesive layer 27 Non-stretched PP film

Claims (6)

[Claims] 1. A tubular body is formed by bonding both side edges of a sheet made of a laminated film having a heat-adhesive film with the heat-adhesive film inside so as to form a cylindrical body, and both open ends thereof are formed. In a sealed packaging bag, a notch for opening is provided at an arbitrary portion of one end of the body portion, and the inner surface side is formed on the peripheral surface of the body portion from the vicinity of the notch over substantially the entire circumference. A packaging bag provided with at least two parallel break lines which do not penetrate. 2. A tubular body is formed by bonding both side edges of a sheet made of a laminated film having a heat-adhesive film with the heat-adhesive film inside so as to form a cylindrical body, and the both open ends are formed. In a sealed packaging bag, a notch for opening is provided at an arbitrary portion of one end of the body portion, and a predetermined width is provided on the peripheral surface of the body portion from the vicinity of the notch to substantially the entire circumference. A packaging bag characterized by being roughened. 3. The package according to claim 1, wherein a part of one side end of the body portion is heat-sealed and sealed, and the notch for opening is provided in the sealed portion. bag. 4. A laminated film in which at least a heat-adhesive film is laminated so as to serve as an inner surface layer on one surface of a synthetic resin film having at least two parallel breaking lines penetrating the back surface side at predetermined positions. And a tubular shape in which both side edges of the sheet are laminated in a palm-shape with the heat-adhesive film inside, and the breaking line is in a direction intersecting with the joint section in a palm-shape. And then at least one of the at least two ends formed on the body part at one end of the body part after sealing both open ends of the body part.
A method for manufacturing a packaging bag, characterized in that a notch for opening is provided at a position substantially in the center in the width direction of parallel break lines of a book. 5. A sheet made of a laminated film in which at least a heat-adhesive film is laminated so as to serve as an inner surface layer on a back surface of a synthetic resin film roughened at a predetermined position on the front surface with a predetermined width. , So that the roughened portion formed by laminating both sides of the sheet with the heat-adhesive film inside in a palm-like shape to form the predetermined width is in a direction intersecting with the pasting-like laminating area. A tubular body, and after sealing both open ends of the body, the width direction of the roughened portion formed on the body at one side end of the body A method for manufacturing a packaging bag, characterized in that a notch for opening is provided at a substantially central position of. 6. The method for producing a packaging bag according to claim 4, wherein the position where the notch for opening is provided is sealed by heat sealing.