JPH09120802A - Manganese dry cell - Google Patents

Abstract

(57) [PROBLEMS] To improve the film packaging method of a manganese dry battery to eliminate waste of release paper of a conventional shrink tack label and prevent winding deviation. By encapsulating the outer peripheral surface of a zinc can constituting a manganese dry battery with a shrink heat-sensitive label,
The cost is reduced compared to the conventional exterior method, and the appearance failure due to winding deviation is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manganese dry battery whose exterior is a film exterior type.

[0002]

2. Description of the Related Art The outer zinc can exterior of a manganese dry battery is
There are cases of using a film exterior and cases of using a metal jacket. Compared with the metal jacket, the film outer packaging has the advantage that the filling amount of the contents can be increased and the number of parts can be reduced and the manufacturing cost can be relatively reduced. ing.

In the conventional film packaging method, a heat-shrinkable shrink tack label is wound around the outer surface of a zinc can forming a unit cell, and an adhesive layer on the back side of the label is adhered to the zinc can, and then hot air is supplied. Heat shrink the top and bottom of the label. Then, the label is folded around both extreme surfaces to complete the exterior. Therefore, the manufacturing method is simpler than that of the metal jacket method.

[0004]

However, since this shrink tack label has an adhesive layer on the back side, it is integrated with the release paper before use, and the release paper is peeled off from the shrink tack label during use. The release paper is discarded. Therefore, the cost is wasted accordingly. FIG. 3 is a view showing the structure of this heat-shrinkable shrink tack label, 3 is a shrink tack label sheet, 3a is a shrink tack label, and 3b is a release paper. Further, the shrink tack label has a variation in the sticking position due to the meandering of the slit, which directly contributes to the winding deviation of the battery label and causes a defective appearance.

The present invention has been made to solve the above problems, and an object of the present invention is to reduce the cost by eliminating the above waste in a manganese dry battery of film exterior type, and to reduce the incidence of defective appearance batteries. It is a thing.

[0006]

In order to solve the above problems, the present invention uses a shrink heat-sensitive label as an exterior film, that is, the present invention is a manganese dry battery in which a battery element is housed in a zinc can. In the above, the outer peripheral surface of the zinc can is covered with a shrink heat-sensitive label.

Here, the shrink heat-sensitive label uses a heat-sensitive adhesive as an adhesive on the back surface of the label. Since this heat-sensitive adhesive is inactive at room temperature, release paper is not required and the cost is reduced accordingly. You can go down. Further, since the operation of peeling off the release paper is not necessary, there is no misalignment of the label as in the case of the conventional shrink tack label.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The shrink heat-sensitive label used in the present invention is, for example, polyethylene terephthalate (PE).
T), polypropylene (PP), polyvinyl chloride (PVC), or other film is laminated with a heat-sensitive adhesive layer made of chlorine-based polypropylene-based resin or the like via an aluminum vapor-deposited layer. Printing can also be applied to the surface of the film. FIG. 1 is a (a) top view and a (b) cross-sectional view of such a shrink heat-sensitive label sheet. In the figure, 1 is a shrink heat-sensitive label sheet, 1a is a shrink film, 1b is a heat-sensitive adhesive layer, and 1c is a printing surface.

FIG. 2 is a cross-sectional view showing a part of a manganese dry battery having a shrink heat-sensitive label packaged thereon. In the figure, 2 is a unit cell, which is composed of a zinc can 2a, a separator 2b, a positive electrode mixture 2c, and a carbon rod 2d. The shrink heat-sensitive label 1 is attached to the outer peripheral surface of the zinc can 2a constituting the unit cell.

To attach the shrink heat-sensitive label to the zinc can, first, the shrink heat-sensitive label is heated by a heater to activate the heat-sensitive adhesive. This is attached to the outer circumference of a zinc can and further heated to shrink it. At this time, if the manganese dry battery is heated in advance, the label winding becomes easy.

The use of the shrink heat-sensitive label has a cost advantage of about 40% as compared with the conventional shrink tack label. Further, the appearance defect occurrence rate due to winding deviation was improved by 90% as compared with the conventional shrink tack label. There is no adverse effect on the battery performance.

[0012]

As described above, according to the present invention, since the shrink thermosensitive label is used for the exterior of the manganese dry battery,
The cost can be reduced as compared with the case where the conventional shrink tack label is used, and the appearance defect can be reduced.

[Brief description of the drawings]

FIG. 1A is a top view and FIG. 1B is a cross-sectional view of a shrink heat-sensitive label sheet used in an example of the present invention.

FIG. 2 is a cross-sectional view showing a part of a manganese dry battery with a shrink thermal label packaged thereon.

FIG. 3 is a diagram showing a configuration of a shrink tack label used in a conventional exterior method.

[Explanation of symbols]

1 ... Shrink heat-sensitive label sheet, 1a ... Shrink film, 1b ... Heat-sensitive adhesive layer, 1c ... Printing surface, 2 ... Unit cell, 2a ... Zinc can, 2b ... Separator, 2c ... Positive electrode mixture, 2d ... Carbon rod.

Claims (1)

[Claims] 1. A manganese dry battery in which a battery element is housed in a zinc can, wherein the outer peripheral surface of the zinc can is covered with a shrink heat-sensitive label.