JP2015040067A - Liquid packaging bag and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag for liquid producible without performing a large-scaled improvement of a bag making machine and easy to pour out without clogging, and to provide a method for production of the packaging bag.SOLUTION: A packaging bag 100 for liquid comprises a peripheral edge seal part 3 formed by overlapping a front film 1 and a back film 2, a content housing part 5 surrounded by the peripheral edge seal part and a content pouring path 6 through which a content is poured out. The front and back films of a content outflow path swell outside, respectively, and a fluid inflow port 9 for making a fluid flow in is provided to communicate with the content outflow path. Then, the front and back films of the content outflow path are swollen outside by inflow of the fluid from the fluid inflow port.

Description

  The present invention relates to a liquid packaging bag and a method for producing the same.

  Liquid products such as shampoos, rinses, body soaps, laundry detergents and softeners are stored in containers such as pump dispensers and plastic bottles with measuring cups.

  If the contents stored in these containers run out of consideration for the environment, etc., refill the purchased liquid product and repeat the use of containers such as pump dispensers and plastic bottles with measuring cups. It has become.

  As a refilling container for storing contents such as a liquid product for refilling, a refilling bag in which a spout can be formed in a soft packaging bag made of a packaging film is generally used.

  In such a refill bag, where the spout is formed at the place where the front and back film sheets are aligned and sealed, the spout is likely to close when trying to pour out, and the contents are There was a problem that it was difficult to pour out.

  For this reason, refill bags that have been devised so as not to close the spout have been developed. As such a refill bag, a refill bag in which a tube is inserted into the content outflow passage leading to the spout and is not closed, and an emboss is provided in the content outflow passage leading to the spout to expand the state. There is a refill bag that makes it easy to pour out the contents.

  For example, a bowl-shaped spout portion (content outflow passage) that protrudes outward from the content storage portion is provided at one corner of the upper part of the container formed by bonding the sides of two opposing films (sheets). In a liquid packaging container, there is a liquid packaging container in which a film is convex outward from the film surface and provided with a convex emboss extending from a spout portion through a spout portion base end to a storage portion (Patent Document 1).

  In order to provide such an emboss that protrudes outward from the film surface, it is generally provided by pressing between a male mold and a female mold. However, it is difficult to carry out the process of providing embosses that protrude outwardly on the front and back films of the bag with a mold after bag making.

  In addition, embossing a continuous long film before it is put on a bag making machine may cause the embossing to be crushed at the time of winding, and there is a possibility that it cannot be properly wound due to the embossing. is there.

  Therefore, although embossing will be processed on a bag making machine, it is difficult to provide such an embossed processing part in an existing bag making machine, and it was possible to provide an embossed processing part. However, a male mold and a female mold for embossing had to be prepared according to the shape of each bag, and could not be implemented easily.

  Known documents are shown below.

Japanese Patent No. 4802362

  The present invention has been made in view of the above circumstances, and provides a liquid packaging bag that can be manufactured without significant improvement in a bag making machine, and that is easy to pour without blocking a spout, and a method for manufacturing the same. The challenge is to do.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the invention of claim 1 provides a content storage portion in which a peripheral seal portion is provided by overlapping a front film and a back film, and the content storage portion is surrounded by the peripheral seal portion. A liquid packaging bag having a content pouring path through which contents are poured out from an article storage unit, wherein the front film and the back film of the content outflow path are swelled outward, respectively, and the content outflow path The liquid packaging bag is characterized by being provided with a fluid inflow port through which a fluid flows so as to communicate with the fluid.

  Invention of Claim 2 of this invention is a manufacturing method of the packaging bag for liquids of Claim 1, Comprising: The said fluid is flowed in from the said fluid inflow port, The said front film and back film of the said content outflow path are made into A method for producing a packaging bag for liquid, the method comprising inflating outward.

  According to a third aspect of the present invention, the content film outflow path is configured such that the front film and the back film at the base on the content storage portion side of the content outflow path are sandwiched and brought into close contact with each other, and a fluid is introduced from the fluid inlet. The method for producing a packaging bag for liquid according to claim 2, wherein the front film and the back film are expanded outward.

  The liquid packaging bag of the present invention can be manufactured without significant improvement in a bag making machine, and when the contents are poured out, the pouring outlet is not blocked, and the liquid packaging bag is stably poured out, so that it is easy to pour out. Moreover, the manufacturing method can manufacture the liquid packaging bag which is easy to pour out, without making a big improvement in a bag making machine.

It is explanatory drawing which showed typically an example of the packaging bag for liquids of this invention. (A) It is a front view. (B) It is a left view. (A), (B) It is explanatory drawing which showed typically the example of the cross section of the laminated | multilayer film used for the packaging bag for liquids of this invention.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing an example of the liquid packaging bag of the present invention. (A) It is a front view. (B) It is a left view.

  As shown in the front view of FIG. 1 (A) and the left side view of (B), the liquid packaging bag 100 of this example is provided with a peripheral seal portion 3 by overlapping the front film 1 and the back film 2. It is a packaging bag. At the bottom, a bottom tape 4 folded in half is sandwiched with the folded portion up, and a bottom seal portion 3a sealed in a ship bottom mold is formed.

A content storage portion 5 is formed in a portion surrounded by the peripheral seal portion 3, and a content pouring path 6 is connected to the content storage portion 5 at one corner of the upper side. In the vicinity of the tip of the content extraction path 6, a planned cutting line 7 for cutting the content extraction path 6 to form a spout is provided.

  Prior to the planned cutting line 7, a knob portion 8 that is pinched when cutting the planned cutting line 7 is widely formed. The knob 8 is provided with an unsealed fluid receiving chamber 10 and a fluid inlet 9 formed by a cut or a through hole. The fluid receiving chamber 10 communicates with the outside air through the fluid inlet 9.

  Further, a communication path 11 is provided between the fluid receiving chamber 10 and the contents outflow path 6 so as to communicate therewith. For this reason, when the fluid is introduced from the fluid inlet 9, the fluid flows into the content extraction passage 6 through the fluid receiving chamber 10 and the communication passage 11.

  In the contents pouring path 6, the front film 1 and the back film 2 are swelled to the outside, respectively, and when the contents are poured out, the pouring outlet is not closed and it is easy to flow out. In addition, a pinch position 12 is secured at the base of the content pouring path 6 on the side of the content container 5 where the front film 1 and the back film 2 are pinched and brought into close contact when the fluid flows into the content pouring path 6. Has been.

  2A and 2B are explanatory views schematically showing an example of a cross section of a laminated film used in the liquid packaging bag of the present invention.

  The front film 1, the back film 2, and the bottom tape 4 used in the liquid packaging bag 100 of this example are made of a laminated film as shown in FIG. 2 (A) in which a base film 21 and a sealant film 22 are laminated. ing. Moreover, the intermediate | middle film 23 may be provided between the base film 21 and the sealant film 22 like the laminated | multilayer film of FIG.

  For the base film 21, a stretched film of a resin such as polyethylene terephthalate, nylon, or polypropylene is preferably used. Moreover, you may use the vapor deposition film which provided the vapor deposition layer of inorganic oxides, such as an alumina and a silica, in these films.

  You may provide a pattern printing layer in the back surface of the base film 21. FIG. The pattern print layer can be provided by a printing method such as gravure printing using urethane-based ink or the like, flexographic printing, or inkjet printing.

  The sealant film 22 is made of a polyethylene film such as low density polyethylene or linear low density polyethylene, or a thermoplastic resin film such as polypropylene film.

  When the intermediate film 23 is used, the intermediate film 23 can be a nylon stretched or unstretched film. Alternatively, a vapor deposition film in which a stretched film of polyethylene terephthalate, nylon, ethylene-vinyl alcohol copolymer or the like is provided with a vapor deposition layer of an inorganic oxide such as alumina or silica or a metal such as aluminum can also be used.

  Further, a so-called MXD nylon made of metaxylenediamine / adipic acid having a high barrier property, a film such as an ethylene-vinyl alcohol copolymer, or a metal foil such as aluminum may be used for the intermediate film 23. Further, the intermediate film 23 may be a multilayer film by combining these films and foils.

For laminating these base film 21, sealant film 22, and intermediate film 23,
It can be laminated by a dry lamination method using a two-component curable urethane adhesive or the like. Alternatively, the thermoplastic resin may be melted and extruded and laminated by a sandwich lamination method.

  Hereinafter, the manufacturing method of the packaging bag 100 for liquids of this example is demonstrated.

  On the bag making machine, the fluid inflow port 9 is provided by punching at a predetermined position of either the front film 1, the back film 2, or both. Next, the front film 1, the back film 2, and the bottom tape 4 folded in half are overlapped to seal the peripheral seal portion 3. Thereby, the content storage part 5, the content extraction path 6, the fluid receiving chamber 10, and the communication path 11 enclosed by the peripheral seal part 3 are provided.

  At this time, the filling port for the contents (in this example, the side opposite to the top part contents pouring path 6) is left unsealed and opened. Thereafter, by the punching process, the liquid packaging bag 100 is extracted along the outer shape and separated into individual liquid packaging bags 100.

  Next, the front film and the back film are brought into close contact with the pinch position 12 on the content storage part 5 side of the content pouring path 6 with a pinch tool, and the fluid is allowed to flow into the fluid inflow port 9. The front film 1 and the back film 2 of FIG.

  The fluid may be liquid or gas, but in the case of liquid, it may remain and contaminate the contents, so it is preferable to use gas. In particular, air or nitrogen gas which is a kind of air component is preferably used.

  Thereafter, the sandwiching tool is removed and the sandwiching position 12 is opened. Then, the front film 1 and the back film 2 in this portion including the unsealed fluid receiving chamber 10 or the communication path 11 are sealed to close the fluid inlet 9 and the content outflow path 6.

  In the case where the half-cut line is provided on the planned cutting line 7, a half-cut line is then provided by a laser. As described above, the liquid packaging bag 100 in which the front film 1 and the back film 2 of the content outflow passage 6 swell outward is manufactured.

  Thereafter, the filling and sealing machine fills and seals the contents from the filling port of the contents that have been opened unsealed, and the liquid packaging bag 100 filled with the contents is obtained.

  Specific examples of the present invention will be described below.

<Example 1>
As a front film 1 and a back film 2, an alumina-deposited biaxially stretched polyethylene terephthalate film 12 μm is used as a base film 21, a biaxially stretched nylon film 25 μm is used as an intermediate film 23, and a linear low density polyethylene unstretched film 150 μm is used as a sealant film 22. A laminated film was prepared by laminating the film by a dry lamination method using a two-component curable urethane adhesive.

  Moreover, as the bottom tape 4, a laminated film having the same configuration as that of the laminated film and having a linear low density polyethylene unstretched film thickness of 100 μm was prepared. These were slit for a bag making machine and hung on a bag making machine.

Using the bag making machine, according to the above-described method for manufacturing the liquid packaging bag 100, the peripheral seal portion 3 is sealed, and the individual liquid packaging is extracted and separated along the outer shape of the liquid packaging bag 100 by punching. Created in a bag 100.

  The separated packaging bag 100 for liquid is sandwiched between the base pinch position 12 on the content container 5 side of the content pouring path 6 with a pinch tool, and the front film and the back film are brought into close contact with each other. The front film 1 and the back film 2 of the content pouring path 6 were respectively expanded outward.

  Thereafter, the unsealed fluid receiving chamber 10 and the front film 1 and the back film 2 of the communication path 11 are sealed, the communication between the fluid inlet 9 and the content outlet path 6 is closed, and the cut line 7 is half-cut by laser. Cut lines were provided.

  Then, 900 ml of the liquid shampoo of the contents is filled and sealed from the filling port that has been opened unsealed with a filling and sealing machine, and the shape of Example 1 having the shape as shown in FIGS. A liquid packaging bag filled with the contents was obtained.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
In the same manner as in Example 1 except that air was not introduced into the separated liquid packaging bag and the front film 1 and the back film 2 of the contents pouring path 6 were not inflated outwardly, A liquid packaging bag filled with the contents was prepared.

<Test method>
The liquid packaging bags of Example 1 and Comparative Example 1 were tested and evaluated by the following method.

<The state of the spout when opened>
The liquid packaging bags of Example 1 and Comparative Example 1 were cut along the planned cutting line 7 to open the spout, and the state of the spout at that time was observed.

  The case where most of the bag spouts were open without close contact was marked with ◯, and the case where the content spout path was in close contact with most bags closed with a spout closed. The results are summarized in Table 1.

<Ease of pouring>
The shampoo of the contents was poured out from the spout where the liquid packaging bags of Example 1 and Comparative Example 1 were opened, and the ease of pouring was evaluated. The evaluation was performed by five persons, each of which had three liquid packaging bags.

  The bag that can be poured out from the bag with the contents opened is marked as ◯, the bag that can be poured out by pressing the bag strongly is marked as △, and the bag that has been closed is poured out if the opening is not opened by hand. The bags that could not be evaluated were evaluated as x, the evaluations of each person were combined, and the number of bags was summarized in Table 1.

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>
When the liquid packaging bag of Example 1 was cut along the planned cutting line and the spout was opened, most of the bags were inflated and opened without being in close contact. Moreover, the ease of pouring was also good.

On the other hand, when the liquid packaging bag of Comparative Example 1 was cut along the planned cutting line and the spout was opened, most of the bags were in close contact with the content pouring path and the spout was closed. In addition, it was not possible to pour out most bags unless they were pushed hard by hand or the spout was opened by hand.

DESCRIPTION OF SYMBOLS 100 ... Liquid packaging bag 1 ... Front film 2 ... Back film 3 ... Perimeter seal part 3a ... Bottom seal part 4 ... Bottom tape 5 ... Content storage part 6- .... Content extraction path 7 ... planned cutting line 8 ... knob part 9 ... fluid inlet 10 ... fluid receiving chamber 11 ... communication path 12 ... clamping position 21 ... base Material film 22 ... Sealant film 23 ... Intermediate film

Claims (3)

  A liquid in which a front film and a back film are overlapped, a peripheral seal part is provided, a content storage part surrounded by the peripheral seal part, and a content discharge path through which the content is poured out from the content storage part In the packaging bag, the front film and the back film of the content outflow passage are swelled to the outside, respectively, and a fluid inflow port through which a fluid flows is provided so as to communicate with the content outflow passage. A packaging bag for liquids.   2. The method for producing a packaging bag for liquid according to claim 1, wherein the fluid is allowed to flow in from the fluid inflow port, and the front film and the back film of the content outflow passage are expanded outward. Method for manufacturing packaging bags.   The front film and the back film at the base of the content storage portion side of the content outflow passage are sandwiched and adhered, fluid is introduced from the fluid inflow port, and the front film and the back film of the content outflow passage are outward. The method for producing a liquid packaging bag according to claim 2, wherein the liquid packaging bag is inflated.

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