JPH0314453A - Barrier open container - Google Patents

Abstract

PURPOSE:To provide a deep container easy to open but outstandingly barrier by a method wherein a resinous unsealing part is attached to the opening of a barrier, flexible bag and a barrier membrane is formed on the inner wall of the container at the unsealing part. CONSTITUTION:An unsealing part 2 has a bottom plate part 6 and a rising wall 7 and, around its outer periphery, is formed a flange part 8, into which the edge part of a flexible, barrier bag 3 is inserted and attached to the outer periphery of the unsealing part 2 by an ultrasonic sealing method. A rectangular perforation 9 is formed in the surface exposed to outside a container of the bottom plate part 6 of the unsealing part 2 and, in a perforation corner, a pull tab 1 is formed as a knob member. A tear-away piece 11 is removed along the perforation 9 to form an opening part and a lid 5 is put on the rising wall 7 of the unsealing part 2. A barrier membrane 12 is then formed on the bottom plate part 6 including the tear-away piece 11 and part of the rising wall 7. This barrier membrane is composed of three layers, i.e. a medium aluminum layer 13 interposed between two polyethylene layers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a barrier-resistant opening container that has barrier properties and is easy to open.

[Conventional technology]

Recently, a container has been developed in which a barrier film having good barrier properties against oxygen or water vapor is formed on the inner wall by covering both sides of a thin film of aluminum with a thin film of polyethylene or polypropylene.

As shown in FIG. 10, these containers have a 40 μm thick aluminum layer 100, a 40 μm thick unstretched polypropylene layer 101, and an 8 μm thick unstretched polypropylene layer 101 to provide high barrier properties, as shown in FIG.
As shown in FIG. 11, circular blanks 104, 104 are cut out from a barrier film sheet 103 whose both sides are covered with a 0μ unstretched polypropylene layer 102, and the periphery of this blank 104 is folded in to form a rising wall 105. A barrier film or shaped body 106 (FIG. 12) having approximately the same shape as the container is molded, and this is placed in the cavity of the male and female molds for injection molding, so that the barrier film shaped body 106 forms the wall of the container 107. For example, polypropylene (PP) was injected onto the inside of the container to manufacture a shallow container (Figure 13).
.

[The problem that the invention attempts to solve]

However, in the conventional barrier film container of this type, when forming the barrier film molded body 106, a flat barrier film blank was folded and formed, so wrinkles were formed as shown in FIG. In addition to being difficult to store, the wrinkles could create bottle holes, and only shallow containers could be manufactured.

In addition, in conventional containers, the resin portion is exposed to the outside as it is, and wrinkles in the barrier film can be observed from the outside through the resin, resulting in a problem of deteriorating the appearance of the container. Not only does this damage the appearance of the container, but the gas barrier properties may be impaired if the container is damaged during transportation or the like.

In view of the above-mentioned points, an object of the present invention is to provide a deep barrier opening container that is easy to open and has excellent appearance and mechanical strength.

[Means to solve the problem]

Therefore, the present invention connects a resin opening part to the mouth of a flexible bag with barrier properties, forms a barrier film on the inner wall of the container in the opening part, and connects this barrier film with the mouth of the flexible bag. A barrier film is adhered, a line of weakness is formed on the unsealing plate of the unsealing part, and a grip member is provided for forming an opening along the line of weakness, and the barrier film is attached to both sides of the metal thin film. The bag is formed so as to be covered with a thin resin film, the flexible bag with barrier properties is covered with an outer box, and the resin opening part is covered with a lid.

[Effect]

By connecting a resin opening part to the opening of a flexible bag with barrier properties and forming a barrier film on the opening wall of the container, a deep-bottomed container that is easy to open and has excellent barrier properties is provided. (It becomes possible to share.

In addition, by covering the barrier bag with an outer box, it is possible to decorate the appearance of the container, and it is also possible to increase the mechanical strength of the container.

Furthermore, by covering the resin unsealing part with the lid, unused stored items can be stored in a hermetically sealed manner.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a barrier opening container 1 according to the present invention, which is formed of a rectangular shallow bottom opening section 2, a flexible barrier bag body 3, and cardboard or the like. It consists of an outer box 4 and a lid 5.

The opening part 2 constitutes the head of the container, and the opening part 2 has a bottom plate part 6 and a rising wall 7 rising from the periphery thereof, and a flange part 8 is formed along the outer periphery of the rising wall 7. Shaped,
A flexible barrier bag body 3 is provided within this flange portion 8.
is inserted, and the end of the bag body 3 is attached to the outer periphery of the opening portion 2 by an ultrasonic sealing method or a high frequency sealing method.

A rectangular weakened line 9 is formed on the surface of the bottom plate 6 of the opening section 2 exposed to the outside of the container, and a bull tap 10 as a grip member is formed at one corner of the weakened line 9. When the bulltab 1o is pulled, a cutout piece 11 is cut off along the line of weakness 9, and an opening is formed in the cutout portion, allowing coffee or other items stored inside the container to be taken out. Stored items such as unused coffee are stored by covering the lid 5 on the rising wall 6 of the unsealing part 2.

Note that the bottom temporary portion 6 including the cutout piece 11 and the rising wall 7
A barrier film 12 is formed on a part of the container as shown in FIG. 3. This barrier film consists of three layers, and an aluminum layer 13 with a thickness of approximately 40 μm is located in the center. On the sides there is formed an unrolled polypropylene layer 14 approximately 80 microns thick. On the other hand, a stretched polypropylene layer 16 is formed on the resin wall 15 side of the aluminum layer. Note that the layers on both sides of the aluminum layer may be polyethylene layers. In addition, when purchasing a barrier film, the central part is made of iron foil, and the resin on both sides is a vinylidene chloride layer, a polyamide layer, ethylene vinyl acetate J' (a saponified polymer resin layer, a vapor-deposited polyester film, a vapor-deposited polyamide film, etc.). may also be used.

The polypropylene layer 16 is formed by the T-die method or the inflation method, and is a stretched layer under tension during formation.Thus, when the film is formed under tension during film formation, the molecular arrangement is good and heat resistance is improved. increase Therefore, when the opening portion 2 is molded by the injection molding method described later, the resin meat 15 and the barrier film 12 do not separate, and when the cutout piece 11 is cut, the resin meat 15 and the barrier film 12 do not separate. is cut out in one piece to form a positive opening 0 as shown in FIGS. 4 and 5.

The end of the outer box 4 made of cardboard or the like is pushed into the flange part 8, and is adhered to the end of the bag body 3 at the rising wall 6 of the opening part 2, thereby forming the outer wall part of the barrier opening container. (
Figure 6).

Next, the method for opening the unsealed part will be explained.

First, a rectangular cut piece 71 having a size corresponding to the shape of the opening portion 2 is punched out of a barrier film sheet having the structure shown in FIG. 3 using a cutter (not shown) (FIG. 7). This cut piece 71 is attracted to the tip end surface of a male die 81 as shown in FIG. The male die 81 is provided with an injection hole 82 for injecting the resin and vacuum and air ejection holes 83, 83 located radially outward from the injection hole. or to a source of compressed air. The cut piece 71 is molded into a male mold 8.
When fixing by suction to the tip wall of 1, the holes 83, 83
At this time, the outer peripheral end 71a of the cut piece 71 protrudes outward from the tip of the male mold.

Next, as shown in FIG. 9, the male die 81 and the female die 84 are combined to form a cavity 85, and polypropylene (P
A resin such as P), polyethylene (PE), polyester, polycarbonate (PC), or polystyrene (PS) is injected from the 1/I exit hole 82 of the male die 81. At the same time, the valves are switched to blow out air from the holes 83, 83 to help move the cut pieces due to the resin injection pressure. That is,
The air allows the cut pieces to move evenly due to the injection pressure. As a result, the cut piece 71 is pressed against the inner wall of the female mold 84, and the outer circumferential end 71a of the cut piece 71 also rises on the inner wall of the female mold, partially waving the rising wall of the opening portion.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to store the contents in a deep-bottomed container having gas barrier properties, and by providing an outer box outside the bag body, the appearance of the container is decorated. Not only can the mechanical strength of the container be increased, but by providing the lid, it is possible to seal up and store unused contents after forming the opening.

Fig. 6 is a cross-sectional view showing the state of adhesion between the opening part, the bag body, and the outer box, Fig. 7 is a perspective view showing the state in which cut pieces are cut from the barrier film, and Fig. 8 is a view of the opening part manufacturing apparatus before injection. Cross section, No. 9
Figure 10 is a cross-sectional view of an opening manufacturing device after injection, Figure 10 is a cross-sectional view of a conventional barrier film, Figure 11 is a diagram of a blank cut from a conventional barrier film sheet, and Figure 12 is a diagram of a conventional barrier film or A perspective view of the configuration, and FIG. 13 is a sectional view of a conventional container.

1... Barrier open 1L container, 2... Open {1 part, 3...
...Bag body, 4...Outer box, 5...Lid body, 9...Weak line, lO...Pull tab, 12...Barrier film.

[Brief explanation of drawings]

Claims (1)

[Claims] Connecting a resin opening part to the mouth of a flexible bag with barrier properties, forming a barrier film on the inner wall of the container at the opening part,
This barrier film and the barrier film at the mouth of the flexible bag are adhered, and a line of weakness is formed in the opening plate of the opening section, and a grip member is provided for forming an opening along this line of weakness. , the barrier film is formed by covering both sides of a metal thin film with a resin thin film, the barrier flexible bag body is covered with an outer box, and the resin opening part is covered with a lid body. A barrier-resistant open container.