JPH09142481A - Film-coated metallic can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a double lock seam part of a can with a bottom plate attached by double lock seam from being rusted. SOLUTION: A metallic can with a bottom plate 3 attached by double lock seam is coated with a synthetic resin film 4 from the circumferential face of the barrel to the bottom plate 3, and the lower end of the synthetic resin film 4 is stuck on the bottom plate 3 with adhesive 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal can container such as a spray can for cosmetics or the like.

[0002]

2. Description of the Related Art Conventionally, as a container for hair spray, for example, a container provided with a spray nozzle at the upper portion and a bottom portion made of a metal can having a bottom lid wound around and attached to a lower end portion of a body portion at a peripheral portion thereof. Many are used. Many of such spray cans are generally made of steel, and the body of the can is printed with a product design or the like.
However, at the tightening portion of the bottom lid, the steel surface is exposed and is easily scratched, so that it may be wet with water in a washroom or the like to cause rust.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal can in which the wound portion of the bottom lid is prevented from getting wet with water and rust is prevented from occurring.

[0004]

According to the present invention, as means for solving the above-mentioned problems, a body of a metal can having a bottom lid attached by winding a peripheral edge portion of the bottom lid and a lower end portion of the body portion. That is, it is covered with a synthetic resin film from the peripheral surface to the bottom surface, and the bottom side edge of the synthetic resin film is adhered to the bottom lid with an adhesive.

In addition, the heat-sensitive adhesive is applied to the bottom edge of the synthetic resin film, and is adhered to the bottom surface by the heat-sensitive adhesive.

As described above, since the synthetic resin film covers the body surface from the peripheral surface to the bottom surface, water leakage at the peripheral portion of the bottom lid can be prevented and rust can be suppressed. Further, since the edge portions of the film are adhered, water can be prevented from entering.

Further, since the heat-sensitive adhesive is applied to the edge portion on the bottom side of the film, the film can be reliably bonded over the entire length.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a film-coated metal can 1 of the present invention, the right half of which is a sectional view.
Reference numeral 2 is a body of a metal can made of steel. Reference numeral 3 denotes a bottom lid of the metal can, which is a peripheral edge 3a of the bottom lid and a lower end portion 2 of the body portion 2.
It is attached by tightening a. The body 2
The synthetic resin film 4 is covered from the peripheral surface to the bottom surface. The bottom end of the synthetic resin film 4 is
It is adhered to the bottom surface with adhesive 5.

Examples of the synthetic resin film 4 used in the film-coated metal can 1 of the present invention include various known single-layer or multi-layer films and synthetic papers made of polyester, polypropylene, polyethylene, polyvinyl chloride, polyamide, polystyrene and the like. Is.

The thickness of the film 4 is, for example, 10 μm
200 μm. A product name, product design, or the like can be printed on the inner surface or the outer surface of the film 4.
Thus, by printing on the film to be coated, it is not necessary to print on the surface of the body of the metal can.

The synthetic resin film 4 may be a heat-shrinkable film made of a material such as polyester or polypropylene. The heat-shrinkable film is preferably one that greatly shrinks in the circumferential direction of the metal can. For example, a shrinkage rate in the circumferential direction of 20 to 80% and a shrinkage rate in the height direction of 0 to 20% can be used.

Next, an example of a method for manufacturing the film-coated metal can 1 of the present invention by coating the metal can with the synthetic resin film 4 will be described. As shown in FIG. 3, first, a heat-shrinkable film 4 on which a product design or the like is printed is formed into a tubular shape and fitted into a metal can 6 including a body portion 2 and a bottom lid 3. At this time, the heat-sensitive adhesive 5 is applied to the lower end edge 4a of the heat-shrinkable film 4, and the lower end edge 4a is projected downward from the bottom lid 3 of the metal can.

Next, it is heated by radiant heat of hot air or ultraviolet rays,
The heat-shrinkable film 4 is shrunk so that the heat-shrinkable film 4 is brought into close contact with the peripheral surface of the body portion 2 of the metal can, the lower end edge portion 4a is bent inward, and the applied heat-sensitive adhesive 5 is activated. Then, while the heat-sensitive adhesive 5 is activated, the bent portion (lower edge 4a) is pressed and adhered to the bottom surface of the bottom lid 3 by the pressing tool 7 whose surface is formed of heat-resistant rubber or the like. Let At this time, it is preferable to heat the pressing tool 7 to an appropriate temperature because the film and the adhesive are not cooled. As described above, the film-coated metal can 1 of the present invention can be manufactured.

In the example of the manufacturing method described above, a heat-shrinkable film is formed into a tubular shape as the synthetic resin film 4, but when a film that does not shrink heat is used, for example, as shown in FIG. The synthetic resin film 4 having the lower edge 4a coated with the heat-sensitive adhesive 5 is wound around the body 2 of the metal can, and the lower edge 4a is folded to the bottom side by the folding means 8 and heat-pressed to obtain heat sensitivity. The adhesive 5 is used. Then, after the film is wound around the entire circumference of the body, the rear end edge portion 4b of the film can be overlapped with the other end portion and adhered to produce the film.

The film-coated metal can 1 of the present invention has been described in the above embodiment, but is not limited to this. For example, the heat-sensitive adhesive 5 has a lower edge 4a.
Not only that, it may be provided on the entire inner surface of the synthetic resin film, and the synthetic resin film 4 may cover only the vicinity of the lower end of the body of the metal can.

[0016]

As described above, the film-coated metal can of the present invention protects the wound portion of the metal can in which the peripheral edge of the bottom lid and the lower end of the body are wound, prevents water from getting wet, and causes rust. It has the effect of preventing.

[Brief description of the drawings]

FIG. 1 is a front view showing a film-coated metal can of the present invention.
Right sectional view.

FIG. 2 is an enlarged view of a cross section of a main part of the film-coated metal can of the present invention.

FIG. 3 is an explanatory diagram of a manufacturing process of the present invention.

FIG. 4 is a diagram showing a manufacturing example of the present invention.

[Explanation of symbols]

1. Film-coated metal can 2. Body 2a. Lower end of body 3. Bottom lid 3a. Edge of bottom lid 4. Synthetic resin film 5. adhesive

Claims (3)

[Claims] 1. A synthetic resin film from a peripheral surface to a bottom surface of a metal can attached by winding a bottom lid (3) around a peripheral edge portion (3a) of the bottom lid and a lower end portion (2a) of the body portion. (4) covered with (4) and the synthetic resin film (4)
A film-coated metal can, characterized in that the bottom edge of the is adhered to the bottom lid (3) with an adhesive (5). 2. The film-coated metal according to claim 1, wherein the adhesive (5) is a heat-sensitive adhesive applied to the bottom edge of the synthetic resin film (4). can. 3. The film-coated metal can according to claim 1, wherein the synthetic resin film (4) is a heat-shrinkable film.