JPH0738131Y2 - Easy-open paper container - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hermetically sealed paperboard container in which thermoplastic resin is laminated on the front and back sides, and in particular, it is easy to open and the peeling surface is constant at the time of opening to prevent the fiber surface of the paper from being exposed. The present invention relates to an easily openable paper container that can be used.

[0002]

2. Description of the Related Art In a hermetically sealed paperboard container in which a thermoplastic resin is laminated on the front and back, various methods are available so that an opening for pouring a liquid can be easily opened without exposing the fiber surface of the paper. Has been taken. As a conventional opening method in consideration of improving the easy-opening property of a sealed container made of paperboard, one in which an anti-adhesive substance is applied to a part of the inner seal portion of the opening, or
It is known that the shape of the panel of the opening is changed, and that the tab or "string" is attached to the outer surface of the opening to pull it.

[0003]

[Problems to be Solved by the Invention] However, when opening a paper container as in the conventional case, the opening portion is pushed out by the strength of the paper, or a pulling knob is attached to the central portion of the opening portion. I try to pull out the opening part by pulling, but there is a problem that the seal at the center of the container fold is strong and it is difficult to open by any method and the structure of the paper container is destroyed and it cannot be opened smoothly. .

Further, in the conventional opening method,
Due to the effect of pressure at high temperature when sealing the opening of the paper container, the peeling surface of the opening is not constant during opening, the fiber surface of the paper is exposed, and the contents are immersed in the exposed fiber layer of the paper. Inclusion,
There is a problem that it is unsanitary due to dust and the like.

The present invention has been made in view of the above problems of the prior art. The purpose of the present invention is to make it easy to open, and to keep the peeling surface of the opening constant when opening the paper. It is an object of the present invention to provide an easily openable paper container capable of preventing the fiber surface of the product from being exposed and improving the ease of pouring.

[0006]

In order to achieve the above object, an easily openable paper container according to the present invention is a paperboard container in which a thermoplastic resin is laminated on the front and back sides and a liquid is contained in the container.
Film-like laminated resin that is difficult to weld to thermoplastic resin
Thermoplastic such as polyethylene on one side of the material or aluminum foil
Resin laminated to form a tab at one end and thermoplastic at the other end
Open the container with the film with the welded part on the resin layer side.
Pull out the top edge of the drawer panel to pull out the liquid when sealing
Laminated thermoplastic resin from the inner wall surface to the outer wall surface of the container
The welding part is covered so that the surface is in contact with the wall surface of the container.
Bend it so that it touches the inner wall of the upper edge of the drawer panel.
The inner wall surface of the upper end of the drawer panel of the film
The contact surface with is welded to the inner wall surface of the upper end of the drawer panel .

Then, the welding of the film is sealed at the upper end of the panel.

Furthermore, the welding of the film, sealed at the panel top end, the appropriate position of the container outer wall surface at the top of the panel edge preferably temporarily fixed.

In addition, the above film is a multi-layer film.
It is preferable to set the thickness to 00 μ or less.

[0010]

A paperboard container having a liquid as a content is constructed by using paperboard in which thermoplastic resins are laminated on the front and back. Thermoplastic resin
A film-like material or a layer of resin that is difficult to weld to
Laminated thermoplastic resin such as polyethylene on one side of Mi foil
A film having a thickness of 100 μm or less is attached to the opening of the container with the multilayer film. This film has a tab on the tip
Is formed, and at the top end of the drawer panel that forms the opening of the container for drawing out the liquid contents when the container is opened , a thermoplastic resin is applied from the top end of the drawer panel to the inner wall surface of the container. The laminated surface contacts the container wall
So that the welded part is inside the upper edge of the drawer panel.
Bend it so that it touches the wall surface, and attach it.
The contact surface with the inner wall surface of the upper end of the drawer panel is
Liquid is poured out on the inner wall of the upper end of the flannel when the container is opened.
From the inner wall surface of the container to the outer wall surface
So that the surface on which the thermoplastic resin is laminated contacts the wall surface of the container
Cover, the welded part is the inner wall surface of the upper end of the drawer panel.
Bend it so that it touches the
The contact surface with the inner wall surface of the upper end of the drawer panel is
Welds to the inner wall of the upper end . This film is attached by sealing at the upper end of the panel forming the opening and temporarily fixing an appropriate portion on the outer wall surface of the container at the upper end of the panel .

[0011]

Embodiments of the present invention will be described below. 1 to 8 show an embodiment of an easily openable paper container according to the present invention.

In FIG. 1, reference numeral 1 denotes a paperboard container, which is a gable-type paper container having an easy-open structure in which a paperboard in which thermoplastic resin is laminated on the front and back of a plate-like paper is assembled as a container.
The paperboard container 1 has a liquid as a content.
Reference numeral 2 denotes an opening of the paperboard container 1 at which the liquid of the content is poured out. 3 pull out the opening 2 of the paperboard container 1
It is a film for opening . This film 3
As shown in FIG. 6, the aluminum foil 4 and the thermoplastic resin layer 5 such as polyethylene are formed into a thin film. This film 3 is made of paperboard as shown in FIGS.
A predetermined width from the upper center of the panel of the opening 2 of the container 1
The upper end of the panel of the opening 2 of the paperboard container 1
Install so that it covers from the inner wall surface to the outer wall surface. this
The aluminum foil 4 is used for the film 3 because the film 3 is a plate.
Liquid is placed in the paperboard container 1 attached to the opening 2 of the paper container 1.
After storing the body, fold and seal this opening 2.
When a sealed container is formed, the film 3 of the paperboard container 1
Others of the paperboard container 1 whose surface not in contact with the outer wall is folded back
Touches the outer wall (welding flap) and touches this other outer wall
The contact surface of the film 3 is laminated on the surface of the paperboard container 1
This is because it is difficult to weld with the existing thermoplastic resin. Therefore, the film 3 is made of a material obtained by laminating a resin that is difficult to be welded to a thermoplastic resin, instead of the aluminum foil 4 .
It may be one. This film 3 can be pulled open
Since the mouth 2 is opened, when pulling
It is good to use a multi-layer film that takes tensile strength into consideration so that it will not be torn.
Considering the sealing property at that time, it is preferably 100 μm or less. Reference numeral 6 denotes a welded part, which is used to attach the film 3 to the board container 1
For adhering to the inner wall surface of the upper end of the panel of the opening 2.
is there. The welded portion 6 is made up of the aluminum foil 4 and the thermoplastic resin layer 5
A part of a predetermined width from the upper part of the film 3 constituted by
Minutes, on the inner wall surface of the upper end of the panel of the opening 2 of the paperboard container 1.
This is the part that sticks. Therefore, the film 3 is a paperboard
It is folded inside the opening 2 of the container 1 and the welding part 6 is used.
Thus, as shown in FIGS. 2, 3, and 7, it is welded inside the opening 2 of the paperboard container 1. When the film 3 is folded inside the upper end of the panel of the opening 2, the film 3
The surface of the thermoplastic resin layer 5 constituting the above is contacted with the paperboard container 1. By doing this , the film 3
Can be easily welded to the upper end of the panel of the opening 2. The sealing position of the film 3 is determined by the paperboard container 1
Install from the center of. In addition, the film 3
Is a portion corresponding to a portion outside the opening 2 as shown in FIG.
Temporary attachment portions 7 are provided at appropriate places . Reference numeral 8 denotes a notch, which is folded inside the opening 2 of the paperboard container 1 to facilitate folding of the opening 2 of the paperboard container 1. 9 is the upper end mounting side of the opening 2 of the paperboard container 1.
And a tab of the film 3 provided on the opposite side, Fi
It is for gripping when the lum 3 is pulled to open the opening 2 of the paperboard container 1. That is, when opening the paperboard container 1, the tab 9 of the film 3 of the paperboard container 1 is opened.
By tensioning Tsu pull the openings 2 of the paperboard container 1 paperboard
It can be out can pull on the outside of the manufacturing container 1.

As for the butt seal portion of the opening 2 of the paperboard container 1 by the welded portion 6 of the film 3, it is better to attach the film 3 more narrowly to the upper end butt portion of the container for hermeticity and the fiber of the spout portion at the time of opening. Can be less exposed.

Therefore, according to this embodiment, the welded portion 6 of the film 3 is welded to the inside of the opening 2 of the paperboard container 1, the tab 9 side of the film 3 is folded back to the outside, and the temporary attachment portion 7 temporarily Since it is attached, only by pulling out the tab 9, the pulling force of the film 3 causes the opening 2 of the paperboard container 1 to open.
Can be easily opened. Further, according to the present embodiment, since the thickness of the film 3 is small, it is possible to easily seal the entire top of the opening 2 of the paperboard container 1.
Further, according to this embodiment, the film 3, since the one surface is made of an aluminum (Al) material or a thermoplastic resin and solvent wearing hard resin layer such as a foil, paperboard container 1
Even when a high pressure is applied at the time of sealing the opening 2, the structure does not collapse. Further, according to the present embodiment, since the film 3 is attached to the inner surface of the opening 2 of the paperboard container 1 which is the pouring portion, it is easy to pour, the liquid is well drained, and the liquid content is applied to the paper layer. Penetration can also be reduced.

FIGS. 9, 10 and 11 show examples of film shapes. In the film 20, the cut portion 21 of the seal portion that is folded and bent has an arc shape, and the tab 22 has an arc shape. Further, the film 30 has a notch 31 of a seal part which is folded and folded.
Is V-shaped, and the tab 32 is formed in an elliptical shape. Further, in the film 40, the notch portion 41 of the seal portion that is folded and folded is U-shaped, and the tab 42 is formed in a square shape.

As described above, according to the embodiment configured as described above, the sealed container can be easily opened and improved. The film used has a simple structure, is thin, and can be attached in advance during the production of paper containers.
When top-sealing with a filling machine, it can be easily sealed like a conventional general container, and since there is no peeling between the paper layers compared to the conventional method, the liquid runs out easily and the It does not penetrate the layers and is hygienic to the eye.

Another embodiment is shown in FIG. 12 to FIG.
20 shows another embodiment, FIG. 21 shows another embodiment, FIGS. 22-23 shows another embodiment, FIG. 24 shows another embodiment, and FIG. FIG. 26 shows still another embodiment. In the figure, 101 is a gable type easily openable paper container body having a thermoplastic resin layer on the front and back surfaces, and 1
Reference numeral 02 is a top closing side wall for closing the top of the easy-open paper container body 101, 103 is a gabled side wall of the top closing side wall 102, and 104 is an adhesive for sealing the top of the top closing side wall 102. The vertical wall 105 is an adhesive flap for sealing the easy-open paper container body 101. 1
06 is a folding line 107 inside the gable part folding side wall 103.
Gable wall formed by 8; 109, a strip-shaped film attached to the inner surface of the upper end of the folding part 110 of the gable part folding side wall 103; 111, a thermoplastic resin; and 112, a resin that does not easily adhere to the thermoplastic resin. , 113 is aluminum (A
l) Metal foil such as foil. 120 is a notch, 121 is a gable part side wall, 122 is a butt part with the tip of the gable part side wall 121, 130 is a pull tab protruding from the upper end of the gable part side wall 103, 141 is a thermoplastic resin, 14
2 is a resin that is difficult to adhere to the thermoplastic resin, 140 is a resin that is difficult to adhere to the thermoplastic resin 141 and the thermoplastic resin 142
It is a film composed of and. 151 is a thermoplastic resin, 152 is a resin that is difficult to adhere to the thermoplastic resin, 1
Reference numeral 50 is a film made of a thermoplastic resin 141 and a resin 142 that is hard to adhere to the thermoplastic resin.

[0018]

Since the present invention is configured as described above, it has the following effects.

In the easily openable paper container according to claim 1, the upper end of the panel for opening the paperboard container and discharging the liquid is laminated.
Covered by film. This laminated film is the back
Since polyethylene is laminated on the surface, the inner and outer walls of the container
Easily welds to the thermoplastic resin that covers the surface for stable contact
Show strength. On the other hand, the surface of the laminated film is aluminum
Laminated resin that is difficult to weld to foil or thermoplastic resin
Contact with the thermoplastic resin that covers the inner and outer wall surfaces of the container.
Weakness is weak. For this reason, the panel that dispenses the liquid when opening
Easy to pull out the panel and pull out the panel
The surface to be peeled off is welded to aluminum foil or thermoplastic resin
Since it is covered with a resin that is difficult to remove, the peeling surface is constant, the fiber surface of the paper is prevented from being exposed, and the ease of pouring can be improved. Also, weld the film to the upper edge of the panel.
And sealed, and the tip of the film was tabbed.
Therefore, when opening the paperboard container, hold the tabs
Just pull out the rum and the pulling force of the film
It can be opened easily.

In the easily openable paper container of the second aspect, since the film welding is sealed at the upper end of the panel, the opening of the paperboard container can be reliably sealed.

[0021] In the easy-open paper container according to claim 3, since the sealing in welded panel upper end of the film, are rice Karitome the appropriate position of the container outer wall surface at the top of the panel edge, the paperboard container opening parts as possible out to reliably sealed.

In the easily openable paper container according to the fourth aspect, since the film is a multi-layered film having a thickness of 100 μm or less, it is possible to easily seal the entire top of the opening of the paperboard container.

[Brief description of drawings]

FIG. 1 is a partially enlarged perspective view showing a state in which a film is attached to an opening of a paperboard container showing an embodiment of an easily openable paper container according to the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a rear view showing a state where a film is attached to the opening of the paperboard container of FIG.

FIG. 4 is a front view showing a state in which a film is attached to the opening of the paperboard container of FIG.

5 is a front view of the film shown in FIG. 1. FIG.

6 is a cross-sectional view taken along the line AA of the film illustrated in FIG.

7 is a sectional view of the film shown in FIG. 5 with the film attached to the opening of the paperboard container of FIG.

FIG. 8 is a view for explaining the action of the film when opening the paperboard container of FIG.

FIG. 9 is a view showing another example of the film attached to the opening of the paperboard container.

FIG. 10 is a view showing another embodiment of the film attached to the opening of the paperboard container.

FIG. 11 is a view showing still another embodiment of the film attached to the opening of the paperboard container.

FIG. 12 is a structural view showing another embodiment of the easily openable paper container according to the present invention.

FIG. 13 is a diagram in which the opening of the easy-open paper container of FIG. 12 is opened.

FIG. 14 is a view showing a state in which the folding portion of the gable portion folding side wall of FIG. 12 is folded back to the inner surface of the container.

FIG. 15 is an assembly diagram of FIG. 14;

FIG. 16 is a view showing a state in which the film is attached to the upper end portion of the folded portion of the gable portion folded side wall.

FIG. 17 is a plan view of the top seal portion shown in FIG.

FIG. 18 is a perspective view showing another embodiment of the easy-open paper container according to the present invention, showing a state in which a film is attached to the upper end of the folding part of the gable part folding side wall.

FIG. 19 is a perspective view of the film portion after the molding shown in FIG.

FIG. 20 is a view showing a state in which the folding part of the gable part folding side wall is folded back to the inner surface of the container.

FIG. 21 is a perspective view showing still another embodiment of the easy-open paper container according to the present invention.

FIG. 22 is a perspective view showing yet another embodiment of the easily-openable paper container according to the present invention, showing a state in which the folding part of the gable part folding side wall is folded back to the inner surface of the container.

FIG. 23 is an assembled state diagram of FIG. 22.

FIG. 24 is a perspective view showing still another embodiment of the easily openable paper container according to the present invention.

FIG. 25 is a perspective view showing yet another embodiment of the easy-open paper container according to the present invention, showing a state in which the folding part of the gable part folding side wall is folded back to the inner surface of the container.

FIG. 26 is a cross-sectional view of the folding portion illustrated in FIG. 24.

[Explanation of symbols]

 1 ……………………………… Paperboard container 2 ………………………… Opening 3 ………………………… Film 4 ……………………………… Aluminum foil 5 ……………………………… Thermoplastic resin layer 7 ………………………… Temporary part 9 ………………………… Tab

Claims (4)

[Scope of utility model registration request] 1. A paperboard container containing a liquid containing thermoplastic resin laminated on the front and back thereof, and a film-shaped container comprising a thermoplastic resin and a resin resistant to welding.
Thermoplastic such as polyethylene on one side of the material or aluminum foil
Resin laminated to form a tab at one end and thermoplastic at the other end
On the drawer panel that draws out the film with the welded part on the resin laminated surface side when the container is opened
Laminate thermoplastic resin from the inner wall surface to the outer wall surface of the container.
Cover the layered surface so that it contacts the wall surface of the container,
Fold it so that it touches the inner wall surface of the upper edge of the drawer panel.
Bending and attaching, the upper edge of the drawer panel of the film
An easily openable paper container , wherein a contact surface with an inner wall surface is welded to an inner wall surface of an upper end of the drawer panel . 2. The easily openable paper container according to claim 1, wherein the film is welded by sealing at the upper end of the panel. 3. The film is a multi-layer film made of 100
The easily openable paper container according to claim 1, which has a thickness of μ or less . 4. The film is a multi-layer film made of 100
The easily openable paper container according to claim 1, 2 or 3, which has a thickness of μ or less.