JPH10324347A - Package bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly display on an ink layer without spoiling the appearance of a package bag, by interposing the ink layer, for displaying required characters, etc., between heat seal layers in at least one of heat seal parts, each heat seal layer being situated on one of the faces of a packaging laminate film. SOLUTION: In a package bag whose three sides are sealed, packaging films 1 each comprise a base film 2, an intermediate layer 3, and a heat seal layer 4, and areas outside virtual lines are heat seal parts. Also, an ink layer 8 for displaying required characters, marks, etc., on it is formed on the surface of part of one of the heat seal layers 4 of the packaging films 1, for example, in the area where a vertical seal 6 is formed. The ink layer 8 is interposed between the heat seal layers 4 of the package bag 7 after bag making. In the case, forming finder for the ink layer 8 out of a material having the same system as the heat seal layers 4 makes it possible to firmly join the ink layer 8 to the heat seal layers 4 after heat sealing without damaging sharpness for the display of the characters, marks, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a packaging bag,
Except for the print layer required for it to perform its essential functions, for example, the date of manufacture, the place of manufacture, etc.
The present invention relates to a packaging bag provided with an ink layer for indicating by a symbol or the like.

[0002]

2. Description of the Related Art In addition to providing a required printing layer on a packaging container such as a box, can or bottle for packaging, an ink layer is provided at an appropriate position on the outer surface of the printing layer to provide a date of manufacture, a taste It is widely and generally used to display the deadline and the like after the fact, and such labeling is not limited to the above, and in addition to product liability, etc., which has recently been talked about, flexible labels such as packaging bags are also required. There is also a strong demand for flexible packaging materials.

[0003]

However, packaging bags are generally provided with a printed layer in advance on most of the front and back surfaces for the purpose of light shielding and the like, and have a larger margin than containers such as boxes and cans. Because of the small number of parts, it is difficult to secure the display part with the ink layer. On the other hand, when the ink layer is displayed on the outer surface of the packaging bag over the existing print layer, the appearance of the packaging bag is In addition to the loss of image quality, there are inconveniences that reading of the ink layer display becomes difficult. Moreover, the packaging bag
If it is a small packaging bag for seasonings such as sauces, soy sauce, powdered soup, etc., repackaged with the main product, especially food in a molded container, large packaging bag, etc., the small packaging bag is the main food For example, when the ink layer is displayed on the outer surface of the packaging bag because it directly contacts the side dish of lunch box, instant noodles, etc.
In addition to the pigments, vehicles and the like contained in the ink layer coming into contact with the food, there is also a hygienic problem that oils and fats in the food dissolve the ink components. In addition, the packaging bag, after packaging the article to be packaged, has an irregular irregular surface, a curved surface, and the like, and itself has flexibility,
There is also a problem that it is difficult to form an ink layer properly there.

[0004] The present invention has been made as a result of studying to solve such problems of the prior art, and an object of the present invention is to prevent the appearance of a packaging bag from being impaired. Packaging bags and packaging that always make it easier to read the ink layer label and that can reliably prevent the ink layer from contacting food even if it is a small packaging bag that directly contacts food. It is an object of the present invention to provide a method of manufacturing a packaging bag capable of always giving an appropriate ink layer indication irrespective of the inherent flexibility of the bag or the form after packaging.

[0005]

According to the present invention, there is provided a packaging bag comprising a heat-sealing film positioned on one surface of a laminated packaging film, preferably a packaging laminated film not containing opaque packaging materials such as aluminum foil and paper. The layers are heat-sealed with each other, and at least one heat-sealed part thereof has an ink layer for displaying required characters, symbols, etc. interposed between the two heat-sealed layers, and a binder for the ink layer. Is made of the same material as the heat seal layer. Here, the required characters, symbols, etc. are the manufacturing date, time, manufacturing location, equipment used, lot number, serial number, expiration date, etc., as well as a photoelectric tube mark for subsequent cutting of continuous packaging bags. It shall include one or two or more letters, symbols, etc., indicating the opening position of the packaging bag, the opening direction, and others.

[0006] In this packaging bag, more preferably, the ink layer is interposed in the vertical sealing portion of the packaging bag.

[0007]

According to the packaging bag of the present invention, an ink layer such as a required character is displayed on a preferably heat-sealed portion where a printed layer is not normally formed. It is possible to extremely easily read the indication of the ink layer while maintaining a good appearance. Also, here, by forming the ink layer between the heat seal layers of the heat seal portion, the ink layer can be completely sealed in the heat seal portion. Even if the ink layer is repackaged in a contact state, the ink layer can be prevented from coming into contact with food, thereby greatly improving sanitary safety. In addition, here, the ink layer is formed of a material similar to the heat seal layer, so that the ink layer is not heat-sealed without deteriorating the clarity of the display of characters and symbols. Can be firmly joined to

In the case where the ink layer is interposed in the vertical seal portion of the packaging bag, even if the ink layer is interposed at the required pitch in the vertical seal portion, the ink layer may be horizontally interposed. A larger error in the ink layer disposition pitch can be tolerated than in the case where the ink layer is interposed in the seal portion.
That is, in a general bag making machine including an automatic filling bag making machine,
Since the horizontal seal portion is cut at a position approximately half the seal width to form the lower edge and / or upper edge of the packaging bag,
When an ink layer such as required characters is displayed on the horizontal seal portion, it is necessary to ensure that all of the required characters and the like are positioned in at least one of the cut relatively narrow horizontal seal regions. Therefore, while it is necessary to increase the arrangement pitch accuracy of the ink layer, when the ink layer is interposed in the vertical seal portion, a required length is provided at any position of the vertical seal portion having a certain length. Since it is sufficient to display characters and the like, it is possible to increase the pitch error and still perform the intended ink layer display.

When it is essential that the packaging film contains an opaque packaging material such as aluminum foil or paper, it corresponds to a heat-sealed portion where the ink layer is displayed at the stage of laminating the opaque packaging material. By cutting off at least one of the opaque packaging material on the front side and the back side of the packaging bag,
The original function can be sufficiently exhibited in the ink layer display.

In the case where the ink layer of such a packaging bag is formed on the heat-sealing layer of a packaging film which is in a state of applying sufficient tension during continuous feeding operation, the Regardless of the flexibility of the bag and the form after packaging, the packaging bag can be manufactured simply and quickly.

In this case, in order to display the ink layer on the horizontal seal portion, it is necessary to match the formation pitch of the ink layer with the operating pitch of the horizontal seal rolls to properly display characters, symbols, and the like. Although possible, it is also possible to continuously display the ink layer on the vertical seal portion. However, when the ink layer is continuously formed on the vertical seal portion, the waste of ink is increased and the ink layer display is felt to be noisy. In this case, the pitch of the ink layer is adjusted to the operation pitch of the horizontal seal roll. Preferably, it is formed. Here, when the ink layer is formed by an ink-jet printer, little or no external force acts on the packaging film that is being fed and traveled under the action of a predetermined tension, in other words, bag making. The ink layer can be displayed without any influence on the filling and bag making.

Further, when the ink layer is formed in a portion where a vertical seal is to be applied, a mechanism for forming the ink layer can be facilitated. For example, when an ink jet printer is used, a print head is used. The required ink layer can be displayed while the image is kept stationary. In other words, when a plurality of characters, symbols, etc. are to be displayed on the horizontally sealed portion of the packaging film being fed by an ink jet printer, the print head is synchronized with the traveling speed of the packaging film. Although it is necessary to move it, if the display is to be displayed on the part to be vertically sealed, the print head is kept stationary simply by adjusting the ink ejection timing according to the running speed of the film and adjusting the interval of characters etc. It is possible to do.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view illustrating a packaging bag according to the present invention. FIG. 1 (a) shows an expanded packaging film of one packaging bag, and FIG. 1 (b) shows the packaging film. 3 shows a packaging bag sealed on three sides. Packaging film 1 of this example
Is a transparent base film 2 and an intermediate layer 3
1A, the area surrounded by the imaginary line in FIG. 1A functions as a surrounding part of the packaged object, and the area outside the imaginary line functions as the heat sealing part. This packaging film 1 is folded in the width direction with the heat sealing layer 4 inside at the position shown by the dashed line in the figure, and as shown by hatching in FIG. By applying a horizontal seal 5 and a vertical seal 6 to one of the free end portions, a packaging bag 7 filled with an article to be packaged is obtained. In addition, the packaging bag is not limited to the illustrated example, and may be a package before filling the packaged object, or before or after applying any one of the upper and lower horizontal seals. It can be any of those conventionally and widely used.

In the illustrated example, the packaging film 1
By forming an ink layer 8 for displaying required characters, symbols, etc. on the surface of one of the heat seal layers on which the vertical seal 6 is applied, 8 is interposed between both heat seal layers. In this case, the ink layer 8 interposed between the heat seal layers is completely sealed between the heat seal layers by the heat sealing of both heat seal layers, and the display by the ink layer 8 is one of the ones on which the ink layer 8 is formed. It can be read clearly by visual observation or the like from the opposite side of the heat seal layer portion. Incidentally, when the heat seal layer 4 is formed of a polyolefin-based plastic and the binder of the ink layer 8 is also formed of the same material,
After the heat sealing, the ink layer 8 could be firmly joined to the heat sealing layer 4 without deteriorating the clarity of the display of characters, symbols, and the like.

Here, the display of the ink layer 8 can be a symbol such as a bar code symbol in addition to the characters shown in the figure, and the display content can be selected in any manner as required. be able to. In addition, the display mode may be a plurality of rows or columns or a display using a plurality of colors in relation to the width of the vertical seal 6, the content of the display, and the like.

As described above, in the packaging bag 7, the ink layer 8 is interposed in the heat-sealed portion to surround the packaged object on which the printing required for the packaging bag to perform its original function is performed. The required indication can be given without affecting the portion, and the packaging bag 7
Even for a small product that is repackaged with the main product, the direct contact with the product can be sufficiently prevented because the ink layer 8 is sealed between the heat seal layers. Further, in the packaging bag of this example, since the ink layer 8 is interposed in the vertical seal 6, it is not necessary to increase the arrangement pitch accuracy of the ink layer 8 so much as described above.
The intended ink layer display can be reliably performed with a small amount of ink consumption.

FIG. 2 is a view exemplifying a case where the packaging bag according to the present invention is manufactured by an automatic filling bag making machine. In this automatic filling and bag making machine, the packaging film 1 unwound from the take-up roll 11 is sequentially passed through guide rolls 12, 13, and 14, is folded in the width direction by a folding device 15, and then folded in two. The packaging film 1 in a folded state is
A vertical seal roll that doubles as a roll for feeding the film 1
16 and a horizontal seal roll 17, and in the vertical seal roll 16, a vertical seal is formed on the free end portion of the packaging film 1 by flange-shaped heat seal blades 16 a provided on a pair of rotating rolls. 6 and
In the horizontal seal roll 17, the pair of rotating rolls are extended in the length direction thereof, and the heat sealing blades 17 a provided at intervals in the circumferential direction are used to form the pair of rotating rolls on the packaging film 1. Horizontal seal 5 with a predetermined distance in the vertical direction
Is applied.

The inside of the packaging bag 7 manufactured in this way is filled with a material to be packaged, for example, a liquid, by continuously feeding the liquid into the packaging film a after the completion of the vertical sealing by the nozzle 18 as a filling means. Horizontal seal roll 17
The packaging bag 7 after packaging the liquid in this manner is, for example, cut by a cutter roll 19 disposed below the horizontal seal roll 17 for each required number of bags. Then, it is cut at an intermediate position of the horizontal seal 5.

In performing the automatic filling and packaging as described above, in this example, the winding film 11 is fed from the winding roll 11 under the action of a predetermined tension to the packaging film 1 at a portion near the guide roll 13. An ink jet printer 21 is provided on a portion of the heat seal layer 4 where the vertical seal 6 is to be applied.
Thus, an ink layer 8 for displaying required characters, symbols, and the like is formed. FIG. 3 is a schematic plan view showing this.
The shape corresponding to the required characters, symbols, etc. is formed by the print head 22 of the ink jet printer 21 fixed to correspond to one side end portion of the heat sealing layer 4 of the packaging film 1 fed and run at a predetermined speed. To form an ink layer 8.

By the way, in forming the ink layer 8 in this way, by ejecting the ink from the print head 22 in correspondence with the feeding speed of the packaging film 1, characters, symbols and the like are expected. In addition, by adjusting the injection timing according to the feeding speed, the interval of characters and the like can be selected as needed. Then, the ink layer 8 formed on the heat seal layer 4 is completely dried until it reaches the folding device 15, more preferably the guide roll 14, and is firmly fixed to the heat seal layer 4. Therefore, the display of the ink layer is not impaired by the subsequent steps, and the same is applied to the heat sealing at the ink layer forming portion.

As described above, according to this method, since the ink layer 8 is formed on the wrapping film 1 that is running out under the action of a predetermined tension, the wrapping film 1 and the wrapping bag 7 are formed. Regardless of the flexibility of
And, regardless of the form of the packaging bag 7 after packaging,
An appropriate ink layer display can always be provided.

Also, here, an ink jet printer
Since the ink layer 8 is formed by 21, the external force applied to the packaging film 1 can be reduced to a negligible level as compared with a stamp or the like. Therefore, the formation of the ink layer 8 can be performed in subsequent steps. Has no effect.
Moreover, in this example, since the ink layer 8 is formed on the portion of the heat seal layer 4 where the vertical seal 6 is applied, the print head 22 does not need to be moved regardless of the entire length of the ink layer display. Can be indicated with an ink layer.

Although the method of the present invention has been described based on the illustrated example, a case in which the fluctuation of the traveling path due to the so-called fluttering of the packaging film 1 fed from the winding roll 11 can be sufficiently removed. In this case, the print head 22 can be provided at a position distant from the guide roll 13, so that a change in the size of characters and the like can be prevented.

As shown in FIG. 3, a print head can be provided at the right side end of the packaging film 1, and it can be provided at the left and right side ends. When the print heads are arranged at both side end portions, in addition to selectively operating only one of them, each of them can be operated alternately. According to the latter, one of the packaging bags 7 can be used. In addition, when the required ink layer display is performed a plurality of times, the ink layer display can be read from either the front or back side of the packaging bag 7.

[0025]

As is apparent from the above description, according to the packaging bag of the present invention, the ink layer can be formed without impairing the design of the packaging bag and without obstructing reading of the required ink layer display. Can be displayed, and
Even if the packaging bag is repackaged with the main product, it is possible to sufficiently prevent the ink layer from contacting the main product. In addition, by forming the binder of the ink layer from a material similar to the heat seal layer, the sharpness of the display of characters, symbols, etc. is not impaired even after the heat seal, and the ink layer is formed by the heat seal layer. Can be firmly joined to

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a packaging bag according to the present invention.

FIG. 2 is a schematic diagram illustrating a production example of a packaging bag according to the present invention.

FIG. 3 is a plan view illustrating an example of forming an ink layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging film 2 Base film layer 3 Intermediate layer 4 Heat seal layer 5 Horizontal seal 6 Vertical seal 7 Packaging bag 8 Ink layer 11 Winding roll 12, 13, 14 Guide roll 16 Vertical seal roll 17 Horizontal seal roll 21 Inkjet printer 22 Print head

Claims (2)

[Claims] 1. A packaging bag obtained by heat-sealing a heat-sealing layer located on one surface of a laminated packaging film with each other, wherein at least one heat-sealing portion of the packaging bag has both heat-sealing layers. A packaging bag in which an ink layer for displaying required characters, symbols, etc. is interposed, and a binder for the ink layer is made of a material similar to the heat seal layer. 2. The packaging bag according to claim 1, wherein the ink layer is interposed in a vertically sealed portion of the packaging bag.