JPS5824347B2 - packaging container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging container made of a packaging material lined on both sides with a thin film made of a thermoplastic synthetic resin that can be heat-welded to a core material such as paper.

Containers for packaging fluids are now made of packaging materials with a core material such as paper lined with a thin film of thermoplastic synthetic resin, instead of glass bottles, etc., for rationalization of transportation and ease of post-processing. Packaging containers are often used.

Although tetrahedral, hexahedral, and upper gable structures are used in practice, rectangular hexahedral structures have become mainstream due to ease of packaging during transportation.

Therefore, the present invention is directed to rectangular packaging containers.

Requirements for such packaging containers include simplicity of manufacture;
These include toughness, openability to allow the filling to be easily taken out when desired, economical use of container materials, and hygiene.

Among these, toughness and openability are in a contradictory relationship, and efforts are made to achieve both.For example, when a bag-shaped packaging material is formed into a rectangular rectangular shape, perforations are made in the triangular edges formed at the corners. In some cases, it is kept in the bag, or a tear thread or tear band is added.

However, even with these methods, they are still unsatisfactory and the opening performance is poor.

In addition, a hole into which a straw or the like can be inserted may be provided in the container, and the hole may be removably covered with a strip of paper or metal foil laminated with a synthetic resin film, or the inner surface may be covered with a synthetic resin film and the strip may be removed when necessary. There are many products that are used after peeling off and are put into practical use.

Although this type of packaging container can be opened easily, it requires a strip, etc., and has the drawbacks that the packaging material is expensive and the manufacturing efficiency is poor.

Furthermore, a container has been proposed in which a triangular ear piece is cut horizontally and the inner surface of the end is sealed by heat welding, and the container opens from the sealed part during use, but this is not easy to manufacture and has no opening. Since it is exposed to the outside, it has the disadvantage of being unfavorable from a sanitary standpoint.

In view of the above circumstances, the present invention has a simple structure, satisfies both toughness and openness, has good manufacturability, is excellent in material economy, and is preferable in terms of hygiene.
This product provides a new rectangular packaging container made of a packaging material in which a core material such as paper is lined with a thin film of thermoplastic synthetic resin on both sides. is formed, both sides of which are closed with thin films, and the triangular ears provided when forming the rectangular parallelepiped packaging container are thermally welded to the outer thin film of the notch.

The present invention will be described below based on illustrated embodiments.

In FIGS. 1 to 3, the container body 1 is formed by folding a sheet-like packaging material 2 into two or heat-welding the ends of the two-layered sheet, and forming a bag-like product into a rectangular parallelepiped using a molding machine. It is made by

Since this molding means is similar to the conventional technology that is widely used in practice, a detailed explanation will be omitted.

As shown in FIG. 2, the packaging material 2 has a structure in which a core material 3 such as paper is lined with thin films 4 and 5 of thermoplastic synthetic resin.

When forming the container main body 1 from the packaging material 2 formed into a bag shape, in this embodiment, the sealing part 6 of the heat-welded end,
7 is positioned along the center of the wall surface 8 of the container body 1,
It is bent to one side.

When forming a bag-like object into a rectangular parallelepiped, triangular ears 9 are obtained at each corner of the container body 1, and these are attached to the container body 1.
It is bent to the wall surface 8 of and fixed by heat welding.

A notch 10 is provided in the wall surface 8 where at least one lug 9 is bent.

This cut portion 10 is previously provided in the corresponding portion of the core material 3 of the packaging material 2 before the container body 1 is formed.

In this embodiment, the cut portion 10 is made by a circular cut line with only a portion left open, and has a tongue shape that opens when external pressure is applied. 4.5, it is watertightly closed.

The notch 10 is provided in a wide portion of the wall surface 8 where the sealing portion 6 is not bent, and is normally covered by a lug 9 that is heat-sealed to the wall surface 8.

That is, the lug 9 is thermally welded to the wall surface 8 so as to cover the entire area of the notch 10 .

However, it is not necessary to thermally weld the entire area of the lug 9 to the wall surface 8.

In the packaging container having such a structure, when the ear piece 9 is pulled away from the wall surface 8, the notch 10 appears.

In this case, the outer thin film 4 covering the notch 10 is attached to the lug 9 side and torn off, and the tongue piece 11 to which the thin film 4 is attached is removed.
is lifted upward, and the opening 12 is opened as shown in FIG.

At this time, there are cases where the tongue piece 11 does not lift up and remains as it is, but in this case, use a straw etc. to lift the tongue piece 11.
When pressed downward, the thin film 5 inside the notch 10 is easily torn, the tongue piece 11 is pushed downward, and an opening is created in the same manner as in the above case.

Even if the outer thin film 4 is not torn by the tabs 9, it can be torn by a straw or the like.

Therefore, in either case, the opening can be easily opened by pulling the tab 8 away from the wall surface 8.

In FIG. 4, reference numeral 13 denotes a container body, which is made into a rectangular parallelepiped using a packaging material such as paper and lined with a thin film of thermoplastic synthetic resin as in the previous embodiment, and is bent and fixed to the wall surface 16. It has triangular ears 15 at the corners and sealing parts 16 and 17.

A notch 18 is provided in the wall surface 14 on which at least one of the lug pieces 15 is bent and fixed, but this notch 18 is provided only in the core material of the packaging material, and in this embodiment, it is approximately U-shaped. It is made in

That is, before the core material is lined with a thin film, the notches 18 are provided at the corresponding locations on the core material, and the packaging material is formed into a sheet with the core material having the notches 18 at predetermined intervals.

The container main body 13 having such a structure can also be easily opened from the notch 18 by pulling the lug 15 away from the wall surface 14, as in the previous embodiment.

Even if the cut portion provided in the container body is a substantially dogleg-shaped cut line 19 shown in FIG. 5, it may be an X-shaped cut line 20 shown in FIG.
Alternatively, it may be a dotted cut line 21 arranged in a circle as shown in FIG.

Unlike punching a hole in a part of the core material, forming a cut in the core material of a packaging material does not produce chips, so there is no problem with chip disposal, and it is easy to work. There is no problem with the adhesion resistance when lining the plastic synthetic resin, and the manufacturability of the entire container can be improved.

Furthermore, there is no need for a blade that requires precision as in the case of punching holes, and the hole can be formed using a simple tool such as a roller with protrusions, for example.

By providing the cut portion in the core material before lining the thin film, the cut portion is held watertight by the thin film, so that a container forming means called a water muffler can be easily employed.

Although the present invention has been described above in detail based on the illustrated embodiments, the present invention is not limited to the illustrated embodiments, and various changes and improvements can be made.

For example, in the embodiment, a notch is provided in the wall corresponding to one lug, but it can also be provided in the wall corresponding to two or more lug.

Furthermore, the heat-welded portions at the ends can be placed in various locations depending on the method of molding the container.

There are various structures for the cut portion, but the point is that the cut portion may have any shape and structure as long as it can be easily opened by external pressure.

As described above, the packaging container of the present invention is formed by forming a rectangular container using a packaging material in which both sides of a core material such as paper with cutouts lined with a thin film of thermoplastic synthetic resin are used to remove insects. Since the triangular ears are heat-welded to the outer thin film of the notch, even if an external force is applied to the container body during the filling process, the filling material will not eject from the sealed hole. Therefore, the outer wall of the container around the notch is not contaminated with the filling material.

Therefore, hygiene around the notch is maintained, and when the ear piece is heat welded to the outer wall of the container, the filling material does not interfere with the heat welding, making it possible to reliably heat weld the ear piece to the outer wall of the container.

In addition, since the notch is already sealed with a thin film on both sides, the heat welding will be incomplete and partial if the tabs are fixed to the wall to protect the notch from the outside. There is no fear that the filling material will come out to the outside even if heat welding is insufficient.

As a result, the packaging container can be distributed to the market with the filling hygienically sealed, without complicating the manufacturing process or wasting material by using special sealing materials, etc. This is extremely advantageous in terms of food hygiene, as it prevents the surrounding area from becoming unsanitary and from spoiling the filling due to incomplete sealing of the holes.

Moreover, by simply pulling the ear piece away from the wall surface, the outer thin film of the hole can be torn off, and the tongue piece produced by the notch can be lifted up, or even if such a phenomenon does not occur, only the inner thin film can be removed with a straw or the like. Not only is the opening process extremely easy as all you have to do is open the notch, but we have all had the experience of the container being exposed to external force when opening the notch, causing the filling to spray out from the opening and contaminating the surrounding area. In Although,
When tearing off the ear piece, which is likely to apply external force to the container, the inner thin film seals the hole, so there is no risk of the filler spewing out, and the inner thin film can only be cut by breaking the inner thin film with a straw or the like in the final stage of eating or drinking. The notch can be opened, and since the notch is covered with the tab, there is no fear that the notch will be opened inadvertently due to external force.

In other words, it provides both toughness and openability of the container, and also provides an excellent sanitary effect, and furthermore, it solves the problem of chip disposal which is seen in containers having a structure in which holes are punched.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the packaging container according to the present invention, FIG. 2 is a longitudinal sectional view showing a part of the packaging material used for the container in FIG. 1, and FIG. FIG. 4 is a perspective view showing another embodiment of the packaging container according to the present invention, and FIGS. 5 to 7 show a cutout in the packaging container according to the present invention. FIG. 1.13... Container body, 2... Packaging material, 3... Core material, 4, 5... Thin film, 6
, 7, 16. 17...Sealing part, 8, 14...
...Wall surface, 9,15...Ear piece, 10.18.
・・・・・・Notch part, 11...Tanguage piece, 12...
...Opening, 19-21... Cut line as a cut portion.

Claims (1)

[Scope of Claims] 1. A rectangular rectangular shape made of a packaging material in which both sides of a core material such as paper are lined with a thin film made of thermoplastic synthetic resin, and a triangular ear piece that is bent and fixed to a wall surface is attached to the corner. In the packaging container, a notch is formed in advance only in the core material on the wall surface where at least one of the ears is bent, and the notch is closed by the thin film on both sides of the core material, and the notch is closed by the thin film on both sides of the core material. 1. A packaging container characterized in that the outer thin film of the outer part and the ear piece are heat-welded. 2. The packaging container according to claim 1, wherein the cut portion is a circular cut line with a portion remaining. 3. The packaging container according to claim 1, wherein the cut portion comprises a substantially U-shaped cut line. 4. The packaging container according to claim 1, wherein the cut portion comprises a substantially doglegged cut line. 5. The packaging container according to claim 1, wherein the cut portion is an X-shaped cut line. 6. The packaging container according to claim 1, wherein the cut portion consists of dotted cut lines arranged in a circle.