JPH01254561A - Tube container - Google Patents

Abstract

PURPOSE:To prevent the deformation of a tube appearance wise, by providing an outer tube with a means for maintaining a space between the outer and inner tube at a high air pressure upon depression. CONSTITUTION:The air in a space between an inner tube 2 and outer tube 1 is pressed with a check valve 4 or opening 5 provided thereon closed with the finger, whereby the content can be squeezed out of the inner tube. When the pressure is released, the inner tube remains plastically deformed, while the outer tube returns to its original shape. Any material may be used for the manufacture of the inner tube, if it is pliable and thin. The outer tube is of such thickness and elasticity as to allow restoration by itself to the original shape. A rod-shaped check valve 8 may alternatively be provided at the lower end of the tube and the opening 5 is formed, for example, with the raised surrounding surface 6 for depression by the finger.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to tube containers.

[Conventional technology]

Conventionally, tube containers have been used in a wide range of fields such as foods, adhesives, toothpaste, and paints, and their uses are expanding considerably. Materials range from metal to synthetic resin, depending on the required performance.When gas barrier properties are required, metal films laminated with synthetic resin films or multilayer films are used. , Sru.

[Problems with conventional technology]

Among these tube containers, metal tube containers are difficult to use because the tubes are prone to plastic deformation, resulting in a lot of loss when the contents are used up, and leakage from breaks caused by bending.

Synthetic resin tube containers are more elastic than metal tube containers and have the ability to recover even if deformed, so air can easily enter the container (most of them are folded to release air when used). The contents had to be extruded after extrusion, which was troublesome.

[Purpose of the invention]

The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a tube container in which the deformation and origin of the tube are not affected by quantitative changes in the contents, and the tube is not deformed in terms of external shape. .

[Means to achieve the purpose]

The tube container of the present invention is a method in which the contents are put into an inner tube container, a new tube container is placed on the outside of the inner tube container, and the contents of the inner tube container are pushed out using air pressure between the tubes. This method is characterized in that the outer tube is provided with, for example, a reverse valve or an opening as a means for sealing the space between the outer tube and the inner tube and maintaining it at high pressure when pressed.

For this reason, the tube container has a double wall structure in which the outer tube and the inner tube are integrated by molding the discharge port portion as a common part.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. 1 to 4 are diagrams showing the outline of the tube container of the present invention, in which 1 is an outer tube, 2 is an inner tube, 3 is a discharge port, 4 is a check valve, and 5 is an opening. . The check valve may be a rod-shaped body valve 8 shown at the distal end of the tube as shown in FIG. 2, or any other valve that functions as a reversal valve may be used. The structure of the opening 5 of the outer tube in FIG. 3 is, for example, as shown in the cross-sectional view in FIG. It is now possible to hold.

The contents of the inner tube can be pushed out by sealing the air in the gap between the inner tube container 2 and the outer tube container 1 with your fingers and applying pressure to the check valve 4 or the opening 5 provided in the tube. Also, when the pressure is released, the inner tube container remains plastically deformed, while the outer tube restores its original shape.

The inner tube container may be made of any flexible material as long as it is a thin film, but it is preferable to use a material that is easily plastically deformed. For example, polyethylene, polyolefin, modified polyolefin, etc. are suitable (if gas barrier properties are required, a thin film laminated with aluminum foil may be used).

The outer tube may be made of any material that has a wall thickness that allows it to self-restore and is elastic and has a shape that facilitates its return. For example, polyethylene.

A method of integrating the inner tube container and the outer tube container will be explained with reference to FIGS. 5 to 8, but the method is not limited thereto.

In FIG. 5, an inner tube 2 having a discharge port 3 is
The divided outer tubes having an opening on one side are combined at the discharge part via the armrest 7, and the abutting portions of the outer tubes are heat-sealed to obtain the double-structured tube container shown in FIG. It will be done.

In addition, as shown in FIG. 7, insert the inner tube 2 having a discharge port into the outer tube L, which is previously formed into a cylindrical shape, and heat-seal both tubes at the discharge port (b). The two may be combined by threading (a) on the part (Fig. 8).

The double structure tube container may have almost no gap in the initial state when the inner tube is filled with contents, or may have a certain amount of gap. Further, a part of the inner tube may be in contact with the inner wall of the outer tube. It is also possible to glue a portion of the inner tube container near the bottom to the outer tube container.

Further, the discharge port part may be fixed by heat sealing or a backing may be provided to prevent pressure leakage when the inner tube and outer tube are integrated.

The reverse valve attached to the outer tube container may be a rubber valve having a simple structure, and may be a valve having a structure that does not allow air to flow in from one side.

The position of the check valve is not particularly limited as long as it can be attached to any part of the outer tube container.

If an opening is to be made, it is preferable to place it in a position that can be pressed with a finger when gripping the outer tube, and it should be in an appropriate position from the discharge port, and the diameter of the opening should be slightly smaller than the size of a finger. Well, there are no particular limitations. or,
The periphery of the opening may be raised as shown in FIG. 4 so that the opening can be easily pressed and completely sealed.

〔Effect of the invention〕

The tube container of the present invention restores its original shape after pushing out the contents, making it easy to grip (and since it is difficult for air to enter the inner tube, there is no need to push out the air when using it next time. Even if the contents are low, the contents can be taken out without rolling or folding.

Furthermore, even when displaying at a store without using an outer box, the product will not be deformed or deformed by being pressed by other objects, and its appearance will not be damaged.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams for explaining the tube container of the present invention, and Figures 15 to 8 are diagrams for explaining the tube container of the present invention. i') A diagram for explaining the manufacturing method, FIG. 9 is a sectional view of the backing 7. 1...outer tube, 2...inner tube, 3...
・Discharge port part, 4... Check valve, 5... Opening part, 6...
- Swelling, 7... Backing, 8... Rod-shaped body valve. Figure 2 Figure 3 Go to Figure 4 Figure 5 Figure 6 Figure 7 Foil 8 Figure 9

Claims (1)

[Claims] 1. It has a double wall structure consisting of an outer tube and an inner tube that share a discharge port, and the outer tube has a means for maintaining the space between the outer tube and the inner tube at high pressure when pressed. A tube container characterized in that it is attached. 2. The tube container according to claim 1, wherein the means for maintaining a high pressure in the space between the outer tube and the inner tube during pressing is a check valve or an opening.