JPS5913073Y2 - 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, the fluorine contained in the toothpaste tends to cause delamination between the aluminum foil and the gold or axle resin film. 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 includes, from the inside of the body 2, an inner layer 9 made of a polyethylene resin film, an aluminum foil 6, and a colored opaque polyethylene resin film. The outer coat 3 is formed by extrusion laminating a transparent polyethylene resin on the outer surface of the outer layer 4.
and the aluminum foil 6 are bonded by an adhesive layer 5 formed by extrusion lamination of polyethylene resin, and then between the aluminum foil 6 and the inner layer 9, a polyethylene resin is first applied to the inner surface of the aluminum foil 6 by extrusion lamination. A heat treatment H is applied to the adhesive layer 7 to strengthen the bonding of the adhesive layer 7 to the aluminum foil 6, and then the adhesive bonded to the aluminum foil 6 is bonded. A polyethylene resin is extruded and laminated between the layer 7 and the inner layer 9 to form an adhesive layer 8 and the layers 7 and 9 are bonded together.

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

Further, since the outer coat 3 is molded from polyethylene resin like the inner layer 9, when the laminated film is rolled up and molded into the body part 2, the joint strength of the joint portion can be increased.

That is, in order to form the body part 2, the laminated film is rolled up, its both ends are overlapped, and the overlapped ends are heat-welded. At this time, the outer coat 3 and the inner layer 9 are directly connected to each other. Since they overlap in contact, this outer court 3
Since the inner layer 9 and the inner layer 9 are made of the same polyethylene resin, the joint between the overlapping and welded end portions on both sides is extremely strong.

The adhesive layer 5 is for joining the outer layer 4 and the aluminum foil 6, but since it is located outside the aluminum foil 6, it is not affected by the fluorine contained in the contents, so it can create an especially strong bond. No force is required, and simply extrusion lamination is sufficient.

The adhesive layer 7 bonded to the inner surface of the aluminum foil 6 by extrusion lamination is required to be bonded particularly firmly to the aluminum foil 6 because it is a part that is affected by the fluorine contained in the content. Ru.

For this reason, the adhesive layer 7 is bonded to the inner surface of the aluminum foil 6 by extrusion lamination to form a covering, and then is further heat-treated (pressurized while being heated to 60 to 120 (') with a hot roll) to form the aluminum foil. The bonding strength to 6 is increased.

The adhesive layer 8 includes an adhesive layer 7 and an inner layer 9 bonded to the aluminum foil 6.
The adhesive layer 7 and the inner layer 9 are extrusion laminated in order to bond them together, and the adhesive layer 8, the adhesive layer 7, and the inner layer 9 are all made of polyethylene resin, which is the same synthetic resin. The bonding force can be made sufficiently strong.

As described above, the laminated film forming the body 2 of the tube container 1 according to the present invention is further heat-treated H after the adhesive layer 7 is formed on the aluminum foil 6 by extrusion lamination, so that the bonding is extremely strong. This prevents the aluminum foil 6 and the adhesive layer 7 from peeling off due to the fluorine contained in the contents.
Fluoride toothpaste can be stably stored and held.

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

That is, first, the adhesive layer 7 is bonded and molded on the inner surface of the aluminum foil 6 by extrusion lamination, and the formed adhesive layer 7
Heat treatment H is added to increase the bonding strength to the aluminum foil 6, and then the inner layer 9 and the adhesive layer 8 are extrusion laminated and bonded to the aluminum foil 6 to which the adhesive layer 7 is bonded, and the outer layer 4 is bonded. The layer 5 is extrusion laminated and bonded, and the outer coat 3 is further extrusion laminated and coated on the outer surface of the outer layer 4.

In addition, it is also possible to extrude lamination and mold the adhesive layer 7 on the inner surface of the aluminum foil 6 to which the outer layer 4 is bonded by the adhesive layer 5, but the heat of the heat treatment H on this adhesive layer 7 may affect the outer layer 4. Since this may cause problems with the printing applied to the outer surface of the outer layer 4, it is preferable to bond the adhesive layer 7 to the aluminum foil 6 first.

As is clear from the above description, the tube container 1 according to the present invention has aluminum foil 7 formed by the fluorine contained in the contents.
There is no delamination between the inner layer 9 and the inner layer 9, and therefore the fluorine-containing contents can be safely stored and held.The laminated film forming the body 2 is manufactured using conventional lamination technology and heat treatment technology. Since it can be manufactured using as is, it is easy to implement and exhibits effective effects.

[Brief explanation of the drawing]

The drawing is a front view showing an enlarged sectional view of the main part 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...adhesive layer, 9...
...Inner layer, H...Heat treatment.

Claims (1)

[Scope of utility model registration request] The tube container 1 has a body 2 formed from a laminated film, and the laminated film forming the body 2 is made of, in order from the inside, an inner layer 9 made of polyethylene resin, an aluminum foil 6, and an inner layer 9 made of colored opaque polyethylene resin. A transparent outer coat 3 made of polyethylene resin is formed on the outer surface of the outer layer 4 by extrusion lamination, and a polyethylene resin is extruded laminated between the aluminum foil 6 and the outer layer 4. A polyethylene resin bonded by a molded adhesive layer 5, and formed between the aluminum foil 6 and the inner layer 9 by coating the inner surface of the aluminum foil 6 by extrusion lamination and then heat-treated to firmly bond to the aluminum foil 6. A tube container made of a laminated film containing aluminum foil, which is constructed by bonding an adhesive layer 7 made of aluminum foil and an adhesive layer 8 made of polyethylene resin formed by extrusion lamination between the adhesive layer 7 and the inner layer 9.