JP5233100B2 - Easy opening pouch - Google Patents

Description

  The present invention relates to a pouch formed by heat-sealing the outer periphery of the film, particularly immediately after the initial opening of the pouch, by forming a gap between the front and back films without the inner surfaces of the front and back films of the outlet being in close contact with each other, The present invention relates to an easy opening pouch that can be formed by easily pulling the front and back films apart.

  Conventionally, a package (pouch) in which contents such as retort food, detergent for refilling, aseptic packaged food, freshness-maintained packaged food, and pharmaceuticals are hermetically packaged is known. Such a pouch has a configuration in which the notch formed on the left and right sides of the pouch is used as an opening start point, and the film (cutout piece) above the pouch is torn and cut horizontally to perform the initial opening of the pouch.

However, immediately after the pouch is initially opened, there is a problem that the inner surface of the film on the front and back sides of the take-out port portion is in close contact, and the take-out port is blocked. Therefore, in order to open the outlet by separating the film on the front and back, it is necessary to rub the film edge on the front and back with the fingertips several times, shift the film edge, carefully grip the film with the fingertip, and pull the film apart. there were. In particular, when the pouch is cut using scissors or the like, the front and back films are cut sharply, so that the inner surfaces of the front and back films are more likely to be in close contact with each other, and it is difficult to separate the film at the takeout port portion to form an opening.
The prior art document is Japanese Patent Laid-Open No. 2000-72152.

  Therefore, in order to solve the above-mentioned problems, the present invention forms a gap between the front and back films immediately after the initial opening of the pouch, without pinching the front and back films, and pinches the front and back films. It is an object to provide an easy-open pouch that can be easily separated.

Therefore, in order to solve these problems, the invention according to claim 1 of the present invention is a pouch formed by heat-sealing the outer periphery of the film, from the opening side of the pouch to the back side of the film. An easily opening pouch is characterized in that an uneven portion comprising a plurality of concave portions having a convex shape is formed, and the uneven portion is formed in a wave shape having vertices alternately and vertically .

  The invention according to claim 2 is an easy-open pouch characterized in that the uneven portion is composed of a plurality of recesses formed continuously at a constant interval.

As described above, the invention according to claim 1 of the present invention is a pouch formed by heat-sealing the outer periphery of the film, and has a plurality of convex shapes from the front surface to the back surface of the film over the opening location of the pouch. Since the concave / convex portion is formed of a concave portion, and the concave / convex portion is formed in a wave shape having vertices alternately and continuously up and down , immediately after the initial opening of the pouch, between the films on the front and back of the outlet A plurality of gaps are formed. Therefore, the inner surfaces of the front and back films of the pouch take-out port do not stick to each other, and the front and back films can be easily pulled apart by placing a finger on the gap portion.

  The invention according to claim 2 is characterized in that the concavo-convex portion is composed of a plurality of concave portions that are continuously formed at a predetermined interval, so that there is a constant gap between the front and back films of the pouch outlet. A plurality of gaps are formed continuously at intervals. Therefore, the inner surfaces of the front and back films do not stick to each other, and the front and back films can be easily pulled apart by placing a finger on the gap.

  As an example of the easy-open pouch 10 (pouch 10) of the present invention, as shown in FIG. 1, a container 4 made of an unsealed portion filled with contents in advance by a predetermined method is provided at the central portion of the pouch 10. A four-way seal pouch 10 having a heat seal of an upper seal portion 1, a left and right seal portion 2, and a lower seal portion 3, respectively, on the outer peripheral portion of the housing portion 4, A notch 6 is formed above the seal portion 2 as an opening start point when the housing portion 4 is cut across the horizontal direction, and a cutting line 5 is formed between the left and right notches 6 along the opening location. Yes.

  When the pouch 10 is initially opened, the film (cut piece 9) above the pouch including the upper seal portion 1 is cut by cutting the film along the cut line 5 with the notch 6 as a starting point. The initial opening is performed.

  In particular, an uneven portion 7 composed of a plurality of concave portions 8 having a convex shape from the front surface to the back surface of the film F is formed between the left and right notches 6 which are opening locations of the pouch 10. And the said uneven | corrugated | grooved part 7 consists of the several recessed part 8 formed continuously with the fixed space | interval, and also this recessed part 8 is formed in the wave shape which has a vertex continuously and alternately up and down.

  As described above, the concave and convex portion 7 formed on the opening portion of the pouch immediately after the initial opening of the pouch, which will be described later, cuts the concave portion 8 of the concave and convex portion 7 together with excision of the cut piece 9. Film edge F, F 'forms an uneven | corrugated shape. Therefore, it is possible to form the gap S between the front and back films F and F ′ without bringing the front and back film inner surfaces F and F ′ of the take-out port 11 into close contact with each other.

  Next, the initial opening time of such a pouch 10 will be described. First, when the pouch 10 is initially opened, as shown in FIG. 2A, the cut piece 9 is cut horizontally along the cut line 5 with the notch 6 formed in the left and right seal portions 2 as a starting point. Thus, as shown in FIG. 2B, a pouch outlet 11 is formed.

In particular, when the cut piece 9 is cut out, the concave and convex portion 7 is cut out in the substantially horizontal direction together with the cut piece 9, so that the film edge of the takeout port 11 portion forms a concave and convex shape as shown in FIG. It will be.
That is, after opening the pouch, the film edge of the take-out port 11 is formed such that the concave portions B and the convex portions A are alternately repeated at regular intervals, and the convex portion A of the front film F and the convex portion A of the back film F ′. Are in contact with each other, and a gap S is formed between the recess B of the front film F and the recess B of the back film F ′.

  Therefore, air permeability is ensured inside the pouch through the gap S, and the front and back film inner surfaces F and F ′ are not in close contact with each other, and with the initial opening of the pouch, the front and back films F and F ′. Is immediately opened, so that the front and back films F and F ′ can be easily separated with a fingertip.

  Moreover, it is possible to recognize the opening location of the pouch at a glance by the uneven portion 7 formed on the surface films F and F ′, and it is possible to identify the opening location by tactile sensation. Therefore, the consumer can easily recognize the opening location of the pouch.

  Thus, the easy-open pouch 10 of the present invention has an uneven portion 7 composed of a plurality of concave portions 8 having a convex shape from the front surface to the back surface of the film over the opening location of the pouch formed by heat-sealing the outer periphery of the film. With the simple structure to be formed, when the pouch 10 is opened, the front and back film inner surfaces do not adhere to each other, and a gap S is formed between the front and back films, and the front and back films can be easily separated from the gap S. Is possible.

Concave convex portions 7, it is possible to easily form according to the method of conventional embossing, not limited to this, both sides of the film F, the recessed portion 8 of each convex shape inwardly of F ' As long as it is possible to form a plurality of projections and depressions, the method for forming the unevenness is not limited.

  Although the example which formed in each of the film F and F 'of the front and back as the said uneven | corrugated | grooved part 7 was shown, what is necessary is just to form in at least one film F of the front and back films F and F'. Moreover, although the uneven | corrugated | grooved part 7 of the front and back film showed an example formed so that the convex part A and the recessed part B might contact, the convex part A and the recessed part B did not necessarily contact, but at the time of a pouch opening, between front and back film As long as the gap S can be formed, the shape and the formation location of the uneven portion 7 are not limited.

  Furthermore, while forming uneven portions on both sides of the front and back films, and forming the uneven portions of the front and back films so that they are alternately positioned (nested) on the front and back films, immediately after opening the pouch In addition, the front and back films may be displaced by rubbing and rubbing the film of the uneven portions of the opening portion with the fingertips, and the opening gap S may be easily formed. In this way, the formation position of the uneven portion may be irregularly formed by intentionally shifting the front and back films, etc. Even if the gap S is not necessarily formed immediately after opening the pouch, for example, with the fingertip at the time of opening The structure which forms the clearance gap of an opening by rubbing a film may be sufficient.

  In the above example, the uneven portion is an uneven portion formed of a plurality of recesses formed along the opening direction of the film. However, the present invention is not limited to this, and the uneven portion is, for example, one or two small numbers. The uneven part which consists of an individual recessed part may be sufficient, and an uneven | corrugated part should just be formed at least at the opening part of a pouch. For example, if it is an uneven part consisting of a single dot shape, it is preferably formed immediately below the tear line that is the opening of the pouch, and it is possible to ensure a gap corresponding to the height of the dot shape at the opening of the pouch. Is possible.

  As a method for performing uneven processing on the front and back films F and F ′, for example, after forming a laminated film F formed by laminating a base material layer, an intermediate layer, and a heat-adhesive resin layer, heating having an uneven shape Embossing may be performed using an embossing roll and a normal embossing device that performs hot pressing using a pressure roll that is paired with the embossing roll, and the uneven portion 7 is formed over the entire width of the roll-shaped film F. Is preferred.

  As the films F and F ′, a laminated film mainly composed of a plastic film is used. For example, conventionally known laminated films used in various food pouches can be used, and are particularly limited. is not. The configuration of the laminated film can be appropriately selected depending on the type of liquid food to be filled, the heating conditions applied at the time of pressure heat sterilization after filling, and the like.

As an example of the base material layer of the laminated film F, a biaxially stretched plastic film having excellent heat resistance can be used, but biaxially stretched polyethylene terephthalate (PET) is preferably used.
Moreover, as the intermediate layer of the laminated film, a laminated film of aluminum foil (AL), biaxially stretched nylon (ON), aluminum foil and biaxially stretched nylon can be used.
Moreover, although the modified | denatured polypropylene resin (PP), a high density polyethylene (HDPE), etc. can be used as the said heat adhesive resin layer of a laminated | multilayer film, it is preferable to use the polypropylene resin which blended the elastomer component.
The base layer, the intermediate layer, and the heat-adhesive resin layer are laminated by dry lamination using a urethane-based adhesive. Examples of laminated film configurations include, for example, PET / ON / AL / PP, PET / AL / ON / PP, PET / AL / PP, PET / ON / PP, and the like.

It is a front view which shows an example of the easy opening pouch of this invention. It is a figure which shows the easy opening pouch of this invention. (A) It is a figure which shows before the initial opening of a pouch. (B) It is a figure which shows immediately after the initial opening of a pouch. It is a figure which shows the taking-out port of the pouch just after an initial opening.

Explanation of symbols

1 Upper seal part 2 Left and right seal parts 3 Lower seal part 4 Storage part (unsealed part)
5 Cut line 6 Notch 7 Uneven portion 8 Recess 9 Cut piece 10 Easy opening pouch (pouch)
11 Outlet F, F 'Front and Back Film A Convex B Concave

Claims (2)

  A pouch formed by heat-sealing the outer periphery of the film, forming an uneven portion including a plurality of concave portions having a convex shape from the front surface to the back surface of the film over the unsealed portion of the pouch. An easy-open pouch characterized by being formed into a wave shape having vertices alternately above and below.   The easy opening pouch according to claim 1, wherein the uneven portion includes a plurality of concave portions formed continuously with a constant interval.

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