JPS5913072Y2 - Laminated film tube container with aluminum foil - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tube container made of a laminated film containing aluminum foil, and particularly to a tube container made of a laminated film containing aluminum foil for storing fluoride toothpaste. The purpose is to prevent delamination between the layers.

Tube containers made of laminated film containing aluminum foil are now widely used.

This is because this laminated film tube container containing aluminum foil has many advantages in terms of price, resistance to contents, appearance, and ease of use.

However, when the content is fluoride toothpaste, delamination between the aluminum foil and the synthetic resin film is likely to occur due to the influence of the fluorine contained in the toothpaste. , it was not possible to use a tube container made of laminated film containing aluminum foil.

The present invention was devised to eliminate the drawbacks of the laminated film tube containers using aluminum foil as described above, and one embodiment of the present invention will be described below with reference to the drawings.

The laminated film forming the body 2 of the tube container 1 according to the present invention consists of, from the inside of the body 2, an inner layer 8 made of polyethylene resin film coated on both sides of a polyvinyl chloride resin film, an aluminum foil 6, and a colored opaque layer. The outer layer 4, which is a polyethylene resin film, is stacked in order, and an inner coat 9 is formed on the inner surface of the inner layer 8, and a transparent outer coat 3 is formed on the outer surface of the outer layer 4.
The adhesive layer 5 is formed between the outer layer 4 and the aluminum foil 6, and the adhesive layer 7 is formed between the aluminum foil 6 and the inner layer 8 by extrusion lamination using polyethylene resin.

The outer coat 3 protects the printing applied to the surface of the outer layer 4, improves the appearance of the tube container 1, and enhances the abrasion resistance of the tube container.

The inner coat 9 prevents the inner layer 4 from coming into direct contact with the fluoride toothpaste content, and protects the inner layer 4 and the content from each other.

Then, when the laminated film is rolled up and formed into the body part 2 by the outer coat 3 and the inner coat 9, the bonding strength of the bonded portion can be increased.

That is, in order to form the body part 2, the laminated film is rolled up, its opposite ends are overlapped, and the overlapped ends are heat-welded. At this time, the outer coat 3 and the inner coat 9 are Since the outer coat 3 and the inner coat 9 are made of the same polyethylene resin, since they are overlapped in direct contact with each other, the bonding of the overlapped end portions on both sides becomes extremely strong.

Note that it is desirable that the inner coat 9 has a thickness similar to that of a normal polyethylene resin film, rather than just a simple coating, so a polyethylene resin film is bonded to the inner layer 8 using extrusion laminated polyethylene resin. Is it good to mold it?

This is to further improve the content resistance and to increase the bonding strength of the bonded portion when the body portion 2 is formed by rolling the laminated film.

The adhesive layer 5 joins the aluminum foil 6 and the outer layer 4, and the adhesive layer 7 joins the aluminum foil 6 and the inner layer 8. In particular, the adhesive layer 7 is coated on both sides of the vinylidene chloride resin film forming the inner layer 8. Since it is made of the same material as the polyethylene resin film, it is strongly bonded to this inner layer 8.
This firmly joins the inner layer 8 to the aluminum foil 6.

That is, since the adhesive layer 7 is formed by extrusion lamination of polyethylene resin,
The aluminum foil 6 can be bonded with sufficient strength, and the inner layer 8 can be firmly bonded via the polyethylene resin film.

The adhesive layer 7 formed by this extrusion lamination allowed the aluminum foil 6 and the inner layer 8 to maintain their bond firmly without delamination due to the fluorine contained in the contents.

Although the tube container 1 according to the present invention has the above-described structure, the following order is considered to be the most effective for forming the laminated film constituting the tube container 1.

That is, first, the aluminum foil 6 and the inner layer 8 are bonded together with the adhesive layer 7.
Then, the outer layer 4 is bonded by extrusion lamination with the adhesive layer 5 on the surface of the aluminum foil 6 of this laminated film, and inner coats 1 to 9 and outer coat 3 are applied to both sides of this laminated film. A laminated film for forming the body part 2 is formed by joining and molding by extrusion lamination.

Furthermore, the bonding of the inner layer 8 to the aluminum foil 6 using the adhesive layer 7 and the bonding of the outer layer 4 using the adhesive layer 5 are not limited to the order of the bonding operations, and contrary to the above example, the adhesive layer 5 The aluminum foil 6 and the outer layer 4 may be bonded together first, or the peripheral adhesive layers 5 and 7 may be formed, that is, the inner layer 8 and the outer layer 4 may be bonded to the aluminum foil 6 at the same time.

As is clear from the above explanation, the tube container 1 according to the present invention has a structure in which the aluminum foil 6 is heated by the fluorine contained in the contents.
Since it is possible to prevent delamination between the inner layer 8 and the inner layer 8, fluorine-containing contents can be safely stored, and the laminated film forming the body 2 is manufactured using conventional lamination technology as is. This method has effective functions and effects, such as being easy to implement.

[Brief explanation of the drawing]

The drawing is a partially enlarged longitudinal sectional view showing the structure of the laminated film forming the body of the tube container according to the present invention. Explanation of symbols, 1...Tube container, 2...
... body, 3 ... outer coat, 4 ... outer layer, 5 ... adhesive layer, 6 ... aluminum foil,
7... Adhesive layer, 8... Inner layer, 9...
...Inner court.

Claims (1)

[Scope of utility model registration request] The tube container 1 has a body part 2 formed from a laminated film, and the laminated film forming the body part 2 is made up of, in order from the inside, an inner layer 8 made of polyethylene resin film coated on both sides of a polyvinyl chloride resin film, and an aluminum foil 6. , and an outer layer 4 made of polyethylene resin which has become colored and opaque,
An inner coat 9 made of polyethylene resin is provided on the inner surface of the inner layer 8, and an outer coat made of transparent polyethylene resin is provided on the outer surface of the outer layer 4.
An adhesive layer 7 made of polyethylene resin is formed between the aluminum foil 6 and the inner layer 8, and an adhesive layer 5 made of polyethylene resin is formed between the aluminum foil 6 and the outer layer 4 by extrusion lamination. Tube container made of laminated film with aluminum foil.