JPS59158067A - Cell - Google Patents

Abstract

PURPOSE:To increase the productivity of a cell and improve its finished appearance by preparing an exterior member to be installed on the outer surface of an elementary cell from a thermocontractile resin film having an adhesive layer on its one surface and a print layer on the other surface. CONSTITUTION:A film-like exterior member 1 to be installed on the outer surface of a zinc can 2 used as the case of a dry cell or the like of a single 4 type, is made by forming an adhesive layer 1b on one surface of a thermocontractile resin film 1a and forming a print layer 1c on the other surface. The film-like exterior member 1 is installed by sticking it on the outer surface of an elementary cell before heating the member 1 so as to contract it. As a result, since there is no need to form the member 1 into tube-like form beforehand, the sticking can be easily automatized and the productivity can be increased. Besides, since there is no need to increase the thermocontractility, an improved finished appearance can be obtained and influence on the print layer 1c can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the exterior material of a battery, and an object of the present invention is to provide a battery with excellent appearance and productivity.

Conventionally, heat-shrinkable vinyl chloride resin tubes have been used as exterior materials for Leclancier batteries, etc., but since these tubes do not have adhesive properties on their own, after the necessary printing, the tubes shown in Figure 7 are used. As shown in a, form a tube with an inner diameter larger than the outer diameter of the unit cell (which has a battery function and is not covered with an exterior material) and cut it to an appropriate length to match the height of the battery. After that, the tube F2 is covered with the cell (A) K as shown in FIG. The exterior of the battery was carried out by bringing it into close contact with the outer peripheral surface and the upper and lower curled portions.

In this case, it is difficult to mechanize the process of covering the heat-shrinkable vinyl chloride resin tube over the battery as an exterior material, so the work must be done manually, resulting in poor productivity.
When the cut heat-shrinkable PVC resin tube is placed over the tube, a space is created between the π-tube and the cell due to the dimensional difference between the two, and after heat shrinking, wrinkles appear and the finish is poor. There were drawbacks.

In addition, printing is naturally applied to the outer surface of the heat-shrinkable PVC resin tube used as the exterior material, but there is a limit to the printing that can be done because it is fixed to the battery after a considerable amount of heat shrinkage. For example, metal vapor deposition to create a metallic feel could not be used because it would shrink (and peel).

The present invention solves the drawbacks of the prior art described above, and includes a heat-shrinkable resin film, an adhesive layer formed on one surface of the heat-shrinkable resin film for adhesion to the outer peripheral surface of the unit cell, The purpose is achieved by using an exterior material consisting of a printing station formed on the other side of the heat-shrinkable resin film as an exterior for the outer peripheral surface of the unit cell.

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a partial cross-sectional view showing one embodiment of the battery of the present invention. The battery is a single-cell dry cell, and in this embodiment, the exterior material (1) is used as a battery container constituting the outer periphery of the unit cell. The outer circumferential surface of the zinc can (2) is covered. As shown in FIG. 3, the exterior material (1) consists of a heat-shrinkable resin film (1a), an adhesive layer (1b) formed on one surface of the heat-shrinkable resin film, and a heat-shrinkable resin film (1b) formed on one surface of the heat-shrinkable resin film. The printed layer (IC) is formed on the other side of the film, and the adhesive @ (1b
) is glued to the zinc can (2).

The outer peripheral surface of the unit cell is covered with the above-mentioned covering material as shown below.

Since this exterior material (1) is provided with an adhesive layer (1b), it does not need to be made into a tube shape unlike conventionally used exterior materials, and can be used in the form of a film. For example, Fig. 4a (C
Make it into a film with suitable dimensions as shown (the width is slightly longer than the circumference of the outer periphery of the unit cell (A), and the vertical direction is slightly longer than the height of the outer periphery of the unit cell), and the adhesive layer is (1b
) on the outside of the unit cell (A) as shown in Figure 4C, and heat it to shrink it, as shown in Figure 4C.
The upper and lower ends of the sea urchin are brought into close contact with the upper and lower curled parts of the unit cell (A).

Such an exterior material (according to No. 11) can be easily attached to the outer circumferential surface of a unit cell in a single machine, and does not need to shrink as much as the conventional one due to heat shrinkage. Regardless,
The finish is in very good condition. Since the casing does not need to be significantly shrunk, it is possible to use not only printing with ink as in the past when forming the printing layer (1c), but also vapor deposition of metal such as aluminum, and ink printing on the metal vapor deposition layer. By applying this, a beautiful metallic printed layer can be obtained. Moreover, the shrinkage force of the heat-shrinkable resin film and the adhesive force of the adhesive allow it to adhere tightly to the outer circumferential surface of the unit cell, so the adhesion is stronger and the outer casing material can be peeled off, compared to conventional examples that were made to adhere only by the shrinkage force. There are few Furthermore, when applied to dry batteries as shown in the example, the adhesive strongly adheres to the zinc can, so if a pinhole occurs in the zinc can during use, electrolyte leakage is prevented. It has the effect of preventing In the figure, (3) is the separator, (4) is the bottom paper, (5) is the positive electrode mixture, (6) is the top cover paper, (7) is the carbon rod, (8) is the sealing material, (9) is a sealing body, OCJ is a pace terminal, (one is a camp terminal.

FIG. 5 is a sectional view showing only the exterior material in another example of the battery of the present invention. In this example, the exterior material (1) includes an adhesive layer (1b), a heat-shrinkable resin film (1a) , 4 of the printed layer (1c) and the heat-shrinkable resin film (1d)
Consists of layers. In other words, a heat-shrinkable resin film (1d) is further disposed on the outer surface side of the printed layer (IC) of the exterior material (1) shown in FIG. 3 above.

In addition to the above-mentioned effects, this exterior material (1) can prevent damage to the printed layer (1c) due to scratches or the like.

As the heat-shrinkable resin film for the exterior material in the present invention, a vinyl chloride resin film is used, and the thickness is 20 to 45 mm.
In μm, the heat shrinkage rate is 5 to 15 in the vertical direction and 40 to 6 in the horizontal direction.
Those in the 0th category are preferable. The adhesive constituting the adhesive layer is preferably a pressure-sensitive adhesive. Before use, the packaging material is stored and stored with a release paper pressed against the adhesive layer, and when used, the release paper is peeled off and used.

Fig. 6 shows a conventional battery packaged with a heat-shrinkable vinyl chloride resin tube Q1), and the battery is a single-picture dry cell like the battery of the present invention shown in Fig. 1, and its manufacturing process is as described above. As shown in FIG.

As described in detail above, according to the present invention, a battery with excellent appearance and productivity is provided.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of the battery of the present invention, and FIG. 2 is an enlarged view of the section ``■'' in FIG. Figure 3 is a cross-sectional view showing an extracted exterior material used in the battery shown in Figure 1;
The figure is a perspective view showing the manufacturing process of the battery of the present invention. FIG. 5 is a sectional view showing only the exterior material in another embodiment of the present invention@ike. FIG. 6 is a partial sectional view of a conventional battery, and FIG. 7 is a perspective view showing the manufacturing process of the conventional battery. (1) Exterior material, (1a) Heat-shrinkable resin film, (1b) Adhesive layer, (1c) Printing layer, (1b) Heat-shrinkable resin Film, (A)
...Battery, (2)...Zinc can 11 2 pieces, 4 pieces, 5 pieces, 60 10

Claims (1)

[Claims] 1. A heat-shrinkable resin film, an adhesive layer formed on one surface of the heat-shrinkable resin film for adhesion to the outer peripheral surface of the unit cell, and a heat-shrinkable resin film comprising: 1. A battery characterized in that the outer peripheral surface of the unit cell is covered with a covering material consisting of a printed layer formed on the other surface. 2. The battery according to claim 1, wherein the exterior material further includes a heat-shrinkable resin film disposed on the outer surface of the printed layer.