JP2006051969A - Method for manufacturing spouted pouch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing easily and with good reproducibility a spouted pouch on which a hole can be simply made by piercing it with a bar or the like whose tip is round while the strength of the pouch is held as the whole. <P>SOLUTION: In the method for manufacturing the spouted pouch consisting of the pouch 1 formed of laminated films 1a, 1b and 1c equipped with a resin layer 12 on at least one face of an aluminum foil 11 and the spout stuck and fixed on the pouch 1, by including a process for irradiating a region being inside of a site of the laminated film 1c on which the spout is stuck and fixed with a laser light L from the resin layer 12 side, it is made possible that a notch is formed only in the resin layer 12 to form an easily piercing part 10 without completely giving a damage to the aluminum foil 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a pouch with a spout, in which a pouch for taking out a liquid as a content is attached and fixed to a pouch containing a liquid.

  As a container for storing various liquids, there is known a pouch with a spout formed by attaching and fixing a spout serving as a content outlet to a pouch made of a flexible film material. According to such a pouch with a spout, there is an advantage that the volume after taking out the liquid as the contents can be significantly reduced as compared with a normal bottle.

  Focusing on such advantages, the present inventors have conventionally used a sealing agent such as a silicone sealant that is housed in a rigid cartridge and is extruded by a required amount by an extruder called a caulking gun or the like. As a container for adhesives such as, a structure in which a spout extrusion base substantially serving as a spout is adhered and fixed to one end of a pouch, and a cone-shaped extrusion nozzle can be attached to the extrusion base. Therefore, a container that can be extruded using the conventional extruder as it is under the same workability as the conventional one has been proposed (see Patent Document 1).

  In the container according to this proposal, in order to push out the contents from the sealed pouch in a state where the contents are accommodated, a cylindrical push-out base body adhered and fixed to one end of the pouch using an appropriate stick or the like is used. After making a hole in the pouch on the inner side, a cone-shaped nozzle is attached to the base of the extrusion port, and it is inserted into the extruder in that state, and the same operation as before may be performed.

In such a pouch with a spout, a laminated film is mainly used as a film-like material for forming the pouch, and a container containing an adhesive such as a silicone sealant is used as a film-like material. In order to provide gas barrier properties, a laminated film containing aluminum foil is often used.
JP 2001-335081 A

  By the way, in the above-mentioned pouch with a spout, in order to acquire the intensity | strength, a polyamide resin is used abundantly as a base film arrange | positioned on the outer side of aluminum foil, and polyethylene, a stretched polypropylene, etc. are used depending on the case. Such a polyamide resin and other films for obtaining the strength of a pouch are strong against piercing, and there is a problem that it is difficult to make a hole unless a stick or a cutter with a sharp tip is used.

  The present invention has been made in view of such circumstances, and a spout with a spout that can be easily pierced by a stick having a round tip while opening the hole while maintaining the strength of the pouch as a whole. The problem is to provide a method that can be manufactured well.

  In order to solve the above-mentioned problems, a method for manufacturing a pouch with a spout according to the present invention includes a pouch that is formed of a laminated film including a resin layer on at least one side of an aluminum stay and is sealed in a state of containing a liquid therein. A method for producing a pouch with a spout comprising a spout stuck and fixed to the pouch, wherein the region that is inside the spout sticking and fixing part of the laminated film is irradiated with a laser beam from the resin layer side of the one side. By this, it is characterized by including the process of forming a notch in the said resin layer (Claim 1).

  Here, in the present invention, instead of forming notches in the resin layer by irradiation with the laser beam, a step of forming a large number of micropores in the resin layer may be employed. ).

  Further, in the present invention, the laminated film is a laminated film having a base film on one surface side of the aluminum stay and another resin layer on the other surface side, and the irradiation of the laser beam is performed on the base film. In this way, only the base film can be cut or a large number of micropores can be formed (claim 3).

  In the present invention, if a cut portion or a large number of fine holes are formed in the resin layer forming the laminated film, it can be easily penetrated by sticking a stick or the like into the portion, and this kind of spout is attached. The aluminum foil contained in the laminated film used for the pouch is made by utilizing the point that it hardly transmits laser light.

  That is, in a laminated film that includes an aluminum foil as a gas barrier and a water vapor barrier and is provided with a resin layer on at least one side thereof, a portion in which cut portions or a large number of fine holes are formed is provided only on the resin layer on one side. Thus, the portion can be easily pierced with a laminated film using a round stick at the tip or the like to make a hole. Moreover, in such a laminated film, when the resin layer on one side of the aluminum foil is irradiated with laser light, the aluminum foil reflects the laser light almost without causing any damage to the aluminum foil. Cuts or fine holes can be easily formed only in the resin layer on one side.

  Therefore, by irradiating a laser beam from the resin layer side to the inner region of the pouch spout sticking fixing part using the laminated film containing aluminum foil, only the resin layer is cut or a large number of fine holes are formed. It can be formed without damaging the gas barrier and water vapor barrier functions, and can easily pierce the inner region of the spout sticking / fixing site with a rod or the like without damaging the strength other than the formation position of the notch or micropore. Can be perforated.

  Further, when the pouch is formed using a laminated film in which resin layers are provided on both surfaces of the aluminum foil, as in the invention according to claim 3, the one side (the surface that is the outside of the pouch). It is desirable to irradiate the base film provided in the laser beam with laser light to form cuts or a large number of fine holes for the purpose of forming the cuts or the multiple fine holes.

  According to the present invention, in a pouch with a spout using a pouch formed on a laminated film containing an aluminum foil, while maintaining its strength, and maintaining a gas barrier property and a water vapor barrier property, without preparing a cutter, etc. It is possible to easily pierce the inside of the spout using a rod with a round tip, etc., and in addition, the pouch with a spout having such an easy-to-pierce part is irradiated with laser light to the resin layer on one side By adding a simple process, it can be manufactured with good reproducibility.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a pouch with a spout manufactured by using the method of the present invention, and FIG. 2 is a front view (A) and a BB cross-sectional view as viewed from the end face side to which the extrusion port base 21 is attached. (B).

  In this example, a container containing an adhesive such as a silicone sealant is manufactured by applying the method of the present invention. The pouch 1 has a bottom shape and is deformed to one end of two rectangular films 1a and 1b. A hexagonal film 1c is arranged, the entire circumference of the film is fused to the film 1a or 1b, and both side edges of the films 1a and 1b are fused to each other. It seals by fuse | melting the other end side of 1a, 1b.

  In this example, the films 1a, 1b and 1c constituting the pouch 1 all have a gas barrier property and a water vapor property, so that the aluminum foil 11 is used as a gas barrier layer and a water vapor barrier layer, and a base film on one side thereof. The stretched polyamide resin layer 12 has a structure in which a low-density polyethylene resin layer 13 or an unstretched polypropylene resin layer is laminated on the other side, and is melted so that the polyamide resin layer 12 as a base film is located outside. It is worn.

  In the state filled with the contents, the film 1c is substantially flat as shown in FIG. 1, and the extrusion port (spout) 2 is stuck and fixed to the flat portion. The extrusion port 2 includes an extrusion port base 21 and an extrusion nozzle 22. The extrusion port base 21 has a shape in which a flange portion 21 b is formed on one end side of the cylindrical portion 21 a, and the flange portion 21 b is a film 1 c of the pouch 1. On the other hand, it is stuck and fixed by the hot melt layer 21c. A male screw 21 d is engraved on the outer periphery of the cylindrical portion 21 a of the extrusion port base 21.

  The extrusion nozzle 22 is an overall cone-shaped cylinder whose large-diameter base end side is open, and the distal end of the cylinder is closed when not in use, and corresponds to the required extrusion diameter of the contents. Released by cutting in position. Moreover, the internal thread of the extrusion nozzle 22 base end part is engraved with an internal thread that engages with the external thread 21a.

  Now, in the film 1 c of the pouch 1, an easy-to-pierce portion 10 is formed in a region inside the extrusion port base 21. This easy-to-pierce portion 10 is formed by forming an X-shaped cut in the stretched polyamide resin layer 12 that is the basis film of the outermost layer of the film 1c.

In order to form the incision constituting the easy-to-pierce portion 10, as schematically shown in FIG. 3, the laser beam L from the laser 3 is irradiated from the surface of the stretched polyamide resin layer 12 which is the base film of the film 1c. However, the laser beam L is scanned with a preset pattern, or the film 1c or the laser 3 is relatively moved with a required pattern. By irradiating the film 1c with the laser light L, a cut is formed in the stretched polyamide resin layer 12 on the front surface. However, since the aluminum foil 11 reflects the laser light almost 100%, the aluminum foil 11 and the lower surface side of the aluminum foil 11 are reduced. The density polyethylene layer 13 is not affected at all. As the laser 3, for example, a CO ₂ laser can be used, and the stretched polyamide resin layer 12 can be arbitrarily applied to the stretched polyamide resin layer 12 with an output of about 15 W without affecting the aluminum foil 11 at all. The pattern cuts could be formed with good reproducibility.

  Here, in the present invention, the notch pattern is not limited to the X shape as described above, but may be any other pattern such as a circular pattern. Moreover, the front view seen from the film 1c side to which the extrusion port base | substrate 21 was affixed in FIG. 4 (A), the same figure (B) shows the BB sectional drawing similarly to the previous example. Even if a large number of fine holes 101 are formed in the region inside the extrusion port base 21 of the polyamide resin layer 12 located outside the aluminum foil 11 of the film 1c by irradiation with laser light, the same effect as the previous example is obtained. Can be played.

  Further, as the material of the base film, in addition to the stretched polyamide resin, a known material used in this type of pouch such as stretched polypropylene and polyethylene can be employed. Puncturing can be facilitated by forming cuts and a large number of fine holes by a method equivalent to the example.

It is an external view of the pouch with a spout manufactured by applying the method of the present invention. It is the front view (A) seen from the end surface side to which the extrusion port base | substrate 21 in FIG. 1 was stuck, and its BB sectional drawing (B). It is explanatory drawing of the process of forming the piercing easy part 10 in FIG. It is explanatory drawing of the other pouch with a spout which can be manufactured applying the method of this invention, (A) is the front view seen from the end surface side to which the extrusion port base | substrate 21 was stuck, (B) is the It is BB sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pouch 1a, 1b, 1c Film 10 Easy piercing part by cutting 101 Easy piercing part by many fine holes 11 Aluminum foil 12 Stretched polyamide resin layer 13 Low density polyethylene resin layer 2 Extrusion port (spout)
21 Extrusion base 22 Extrusion nozzle 3 Laser L Laser light

Claims (3)

A method of manufacturing a pouch with a spout formed of a laminated film having a resin layer on at least one side of an aluminum stay and sealed with a liquid contained therein and a spout stuck and fixed to the pouch. There,
A spout pouch with a spout comprising a step of forming a cut in the resin layer by irradiating a laser beam from the resin layer side of the one surface to a region inside the spout adhesion fixing portion of the laminated film. Manufacturing method.   A method of manufacturing a pouch with a spout, characterized in that, instead of forming notches in the resin layer by irradiation with the laser light, a large number of fine holes are formed in the resin layer.   The laminated film is a laminated film having a base film on one side of an aluminum stay and another resin layer on the other side, wherein the laser beam is irradiated to the base film, and the base The method for producing a pouch with a spout according to claim 1 or 2, wherein only a film is cut or a large number of fine holes are formed.

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