EP0762365B1 - Adhesive label - Google Patents

Abstract

An imprint is visible from the upper side under the cover layer and there is an adhesive layer under the imprint. The adhesive label (1) has overlapping first end sections (19) and second edge sections (17) extending over the end surfaces (51) of the battery along a production line of the peripheral surface of the battery (50). The end sections locate on the end surfaces as a result of shrinkage of the cover layer. The imprint is fitted directly on the underside of the cover layer. A layer covering over the imprint and the part surfaces of the cover layer free from the imprint carries the adhesive layer on its underside.

Description

The invention relates to an adhesive label for application to a peripheral surface a dry cell battery.

Conventional adhesive labels to be applied to the peripheral surface of a Dry cell batteries have a stretched, shrinkable, transparent Cover film, one applied directly to the underside of the cover film, Imprint visible from the top of the adhesive label and one below the Printed adhesive layer. The adhesive label points along one Generation line of the peripheral surface of the battery overlapping one another first edge sections and second projecting over the end faces of the battery Edge sections on which after shrinking the cover film on the Lay on end faces.

The cover film forms a leak protection for the battery and also protects the underneath the label layers, especially the print mechanical damage. In addition, the cover film forms an electrical one Isolation of the peripheral surface of the battery from the environment. If one the layer lying under the cover film is electrically conductive, insulates the cover film this layer against the environment.

Various adhesive labels are from DE 33 22 309 C3 (EP 0 129 850 A2) known of this kind. These conventional adhesive labels are made in the manner produced that on a backing layer lying in the finished label several layers are partially applied from shrinkable film, the top of which is imprinted. On the imprint the label must then be attached. So that Cover film adheres to the print, must have a separate lamination adhesive layer beforehand be applied to the print. On the lamination adhesive are with regard to the leakage protection function of the adhesive label, the light fastness and storage stability to make particularly high demands.

FR 2 674 979 A1 is an adhesive label for application to the peripheral surface known a dry cell battery, in which the stretched, shrinkable, transparent cover film is the only film layer of the adhesive label forms. The print that is visible from the top of the adhesive label is directly on the underside of this cover film facing the battery applied. A metallization layer follows on the underside of the print and then the pressure sensitive adhesive layer. Between the pressure sensitive adhesive layer and the metallization layer can be provided with an oxide layer that Isolate metallization layer electrically against the battery body. On Similar metallized adhesive label, which with a single shrink wrap comes out as an outer cover film and carries the print inside, is out Patent Abstracts of Japan, Vol. 12, No. 20 (E-575) and JP-A-62177864 known.

Another with a single, stretched, shrinkable film Adhesive label for the casing of a dry cell battery is from GB 2 193 834 A. With this adhesive label, the shrinkable film carries the Imprint on its outside, while the metallization layer immediately is arranged on the inside of this film. Between the pressure sensitive adhesive layer, with which the adhesive label is glued to the battery body and the metallization layer a layer of PVC lacquer is arranged, which is the metallization layer electrically insulate against the battery body.

Furthermore, GB 2 184 672 describes a layer which is not provided with a pressure-sensitive adhesive layer Foil material known which, after being shaped into a tube can be used to coat dry cell batteries. The film material has a single shrink film on the battery body a multicolored print is applied to the side to be turned. The Imprint is due to two layers of lacquer of different composition covered.

Another adhesive label for battery casings is from FR 2 715 494 A1 known. This label also has a single shrink wrap Cover layer, which is provided on the inside with a print that in turn an electrically non-conductive layer made of particles of a dielectric Minerals carries. The pressure sensitive adhesive layer is on this particle layer arranged. The adhesive label is free of electrically conductive materials, especially a metallization.

The object of the invention is to provide an adhesive label for the casing of a Specify dry cell battery, with the simplest construction without long-term change its appearance to be permanently glued to the battery can.

This object is achieved by the features specified in claim 1.

The print is preferred on the cover film in colors from the organic solution or solvent-free photocatalytic System printed in mirror-image reverse printing, i.e. of below mirror image directly on the cover film, so that the Imprint can be seen correctly from above. These color systems are particularly suitable for printing on the shrinkable Film without changing during the shrinking process or detach from the film. They also have those for dry cell batteries required electrical properties and are chemical resistant, which is particularly important with regard to the Leakage protection function of the battery label is important.

The cover film is preferably made of shrinkable hard PVC, Polypropylene, polystyrene, polyamide, in particular a thickness from 25 to 60 microns, or polyethylene terephthalate, or Polycarbonate, in particular a thickness of 10 to 60 micrometers, educated. So that after the shrinking on the adhesive label the battery adheres as firmly as possible and also under unfavorable ones Ambient conditions, the adhesive label does not differ from the body of the If the battery detaches, the cover film is in the circumferential direction Dry cell battery stretched so that after shrinking the adhesive label has the greatest pretension in the circumferential direction.

Fig. 1

zeigt schematisch das Aufbringen eines Haftetiketts auf einen zylindrischen Körper einer Trockenzellenbatterie.

Fig. 2

zeigt ein Haftetikett im Querschnitt, zur Erläuterung grundsätzlicher Eigenschaften.

Fig. 3

zeigt eine erste Ausführung eines erfindungsgemäßen Haftetiketts im Querschnitt.

Fig. 4

zeigt eine zweite Ausführung eines erfindungsgemäßen Haftetiketts im Querschnitt und

Fig. 5

zeigt eine dritte Ausführung eines erfindungsgemäßen Haftetiketts im Querschnitt.

The invention is explained below using exemplary embodiments with reference to the accompanying drawings:

Fig. 1

shows schematically the application of an adhesive label to a cylindrical body of a dry cell battery.

Fig. 2

shows an adhesive label in cross section, to explain basic properties.

Fig. 3

shows a first embodiment of an adhesive label according to the invention in cross section.

Fig. 4

shows a second embodiment of an adhesive label according to the invention in cross section and

Fig. 5

shows a third embodiment of an adhesive label according to the invention in cross section.

2, which shows a schematic section through an adhesive label 1 to be applied to a battery body, the basic structure on which the embodiments of inventive adhesive labels explained below are based will first be explained. A cover sheet is used during manufacture 3 made of stretched, shrinkable, transparent film made of hard PVC (Polyvinyl chloride), PP (polypropylene), OPP (oriented Polypropylene), PET (polyethylene terephthalate), PS (polystyrene), PE (polyethylene), PC (polycarbonate) or polyamide of one thickness from 20 to 70 microns underside directly with one from the outside visible imprint 5 provided. When using a PET or PC film thicknesses of 10 to 60 microns are preferred.

In the case of using a PP, OPP, PS or PE film as Cover film 3 is, because of the non-polar properties of the film material, the cover film before applying the imprint 5 with an adhesion-promoting primer layer 3a as a pressure improver with a thickness of approx. 2 µm. The primer layer 3a increases the surface tension.

So that the imprint 5 on the cover sheet 3 may also be without a primer layer 3a adheres well, you can cover film 3 in the high frequency field polarize with carboxyl formation (corona treatment). The cover film 3, the primer layer 3a and the print 5 are permanently elastic, so that the label can be used even after several months Storage can be shrunk onto a battery without the imprint 5 detaches from the cover sheet 3. The cover sheet 3 is the only shrinkable plastic film layer of the Self-adhesive labels. You can top and bottom layers wear. The imprint 5 and partial areas of the imprint free Cover film 3 are made with a metal layer 7, in particular Aluminum, steamed or sputtered. The metal layer 7 forms an externally visible background for the imprint 5 and is electrically isolated from the outside by the cover film 3. On the underside of the metal layer 7 becomes a non-metallic one Layer 9 applied from plastic film or paper. The Form metal layer 7 and the non-metallic layer 9 together a carrier material 11 of the label 1. The carrier material 11 can optionally also be a single layer of metallic or non-metallic Material be formed.

The base material 11 is covered with pressure-sensitive adhesive 13 on the underside provided, and the thus finished label 1 is applied to a non-stick, about siliconized carrier tape 15, from which it later uses a dispensing device, not shown is transferred to a battery body.

In Figure 2, the imprint 5 is only schematic with spaces shown. With this adhesive label as in all described below The imprint 5 can, however, also be flat closed, multi-colored, multi-layered, a combination of opaque inks and / or opaque inks his. Also special metal colors, such as those brought into solution Particles of a flat vapor deposition form a special one closed layer of paint.

1 schematically shows the application of the adhesive label 1 a cylindrical battery body 50 a rechargeable or non-rechargeable dry cell or device battery. The adhesive label 1 is on with its adhesive layer 13 the circumference of the battery body 50 so that its not printed and no carrier material 11 having longitudinal edges 17 protrude over end faces 51, 51 of the battery body 50, in particular the stretching direction of the cover film 3 in the circumferential direction of the battery body 50 extends. Then the sticky label 1 around the circumference of the battery body 50, so that end regions 19, 19 of the adhesive label 1 overlap one another. The adhesive label 1 is then exposed to heat shrunk the battery body 50 so that the longitudinal edges 17th rest on the end faces 51, 51 of the battery body 50 and additionally by means of the pressure sensitive adhesive 13 on the end faces 51, 51 stick. Due to the overlapping end regions 19, 19 and the one resting on the end faces of the battery body 50 The adhesive label encapsulates the battery body 50 along longitudinal edges 17 and forms one next to the electrical insulation of the cell Leakage protection. The outer cover layer 3 protects the underlying layers from damage, in particular during the manufacturing process of the battery from the application of the Labels up to the packaging of the finished battery and resists also mechanical stress in battery layers devices used.

3 shows a first embodiment of an adhesive label 1 according to the invention here with a single-layer carrier material 11. The carrier material 11 is made of paper or plastic and is applied to the printed underside of the cover film 3 by means of an intermediate liner layer 21. The lamination layer 21 is applied as a lacquer or adhesive in the liquid or semi-liquid phase and hardens by chemical reaction of binder and hardener constituents, by radiation or / and by the release of solvents. The lamination layer 21 can be pigmented when the print is not closed over the entire area and form an optical background for the print 5. The lamination layer 21 improves the adhesion of the carrier material 11 to the printed underside of the cover film 3. The lamination layer 21 has a thickness of 3.5 to 5 μm, corresponding to 2.5-4 g / m ^2, and forms a barrier against immigration of solvents from the underlying layer Adhesive layer 13 in the print and thereby its change with a long storage time. The liner layer 21 is an additional barrier against migration of electrolyte and at the same time improves the electrical insulation properties of the label without the need for an additional insulation layer. Here too, if necessary, the cover film 3 can be provided with a primer layer 3a before printing or subjected to a high-frequency treatment.

Fig. 4 shows a second embodiment, in which as in the previous embodiment the cover sheet 3 directly on its underside the print 5 is provided, however, differently than in the above embodiment no separate carrier layer follows, but the Adhesive layer 13 directly on the printed underside of the Cover film 3 is applied. The cover sheet 3 takes over here sole function of the adhesive label. The Imprint 5 similarly bears a lamination layer 21 on the underside the embodiment of Fig. 3 carries. The lamination layer 21 is as Paint or glue applied in liquid or semi-liquid phase and hardens through chemical reaction of binder and Hardener components, by radiation or / and by approval from solvents. The lamination layer 21 cannot pigmented flat surface and be pigmented form optical background for the imprint 5. Furthermore, the Laminating layer 21 acts as a barrier against diffusion of solvents from the underside to the lamination layer 21 applied adhesive layer 13 and of electrolytes the surface of the battery body in the imprint 5 and protects it from change. This improves durability and shelf life of the label even under unfavorable Conditions such as high temperature and humidity. Also if necessary, the cover film 3 can be printed here before printing a primer layer 3a or a high-frequency treatment be subjected.

Fig. 5 shows a third embodiment. The cover layer 3 can in the case of a non-polar film, optionally with a Primer layer 3a may be provided. On the imprint 5 and parts of it free the top layer 3 is a lamination layer 21 corresponding to the Execution of Fig. 3 applied.

The liner layer 21 improves the adhesion of one to it applied metal layer 7, such as aluminum. This metal layer 7 is with sputtered or evaporated to a thickness of 2-7 Å. Because of The micropartial bedding of metal particles is the Metal layer 7 porous and has a significantly higher electrical Resistance as a metal foil. The metal layer 7 also hides unavoidable dirt and stains on the battery body 50.

Alternatively, the metal layer 7 can also be used as a film in the transfer process are transferred to the lamination layer 21. Here, a metal foil adheres to its own carrier tape 7 placed on the more adhesive lamination layer 21. Then the weakly adhering carrier tape is removed from that on the Peeled off label material firmly adhering metal layer.

The lamination layer 21 forms a flexible connection between the metal layer 7 and the cover sheet 3. This flexible connection prevents the film from shrinking and Labeling on tight radii of the battery body's metal layer is distorted. The flexible connection takes shear forces and tension in the label. Forms at the same time the flexible connection the barrier described above for FIG. 3, which prevents solvents from the pressure sensitive adhesive 13, which may have penetrated into the pores of the metal layer 7, immigrates into the print and changes it, and that the especially improved electrical insulation. The one in the pores the metal layer penetrated laminating adhesive 21 solidified the metal layer.

The lamination layer 21 can be a varnish that changes after application in liquid or semi-liquid state by chemical Reaction of binder and hardener components, radiation or / and solidified by evaporation of solvents. In front sputtering or vapor deposition of the metal layer 7 can be done allow the lamination layer 21 to solidify. In the case of storage a metal foil, such as in the foil transfer process the metal foil on the not yet solidified lamination layer Apply 21 to the adhesive effect of the not yet solidified Taking advantage of lacquers. The lamination layer 21 can be pigments included to form an optical background for the imprint 5.

The adhesive layer 13 has, as in the previous explanations a thickness of 10 to 25 microns and electrically isolates the Metal layer 7 from the battery body 50. In case of use the lamination layer 21, the adhesive layer 13 be thinner than 15 μm because the lamination layer 21 also has insulating properties.

The pressure sensitive adhesive that has penetrated into the pores of the metal layer 7 13 isolates the pores and thus increases the electrical resistance the metal layer 7.

The liability of the individual label layers must be in the overlap area 19 (Fig. 1) of the adhesive label so that at the battery body 50 label applied the voltage of the shrunk cover film 3 does not tear open the lamination layer 21. The lamination adhesive 21 is preferably a two-component adhesive or paint with binder and hardener, and the pressure sensitive adhesive 13 usually provides a permanently elastic one-component adhesive with stabilizers such as antioxidants Hardening and thus chipping as a result of a surface break prevent at the same time high shear force in the contact area. As a result, the lamination layer 21 adheres in the hardened state Condition stronger than the non-hardening and thus Permanently elastic pressure sensitive adhesive 13. The adhesive effect of the pressure sensitive adhesive 13 in the overlap area 19 with the cover sheet 3 is to the Adhesive effect with the battery body 50 between the overlap areas adjusted so that the overlap bursts open 19 is prevented.

A variety of adhesive labels releasably adhere to a siliconized Carrier tape 15.

Claims (10)

1. Adhesive label for application on to a peripheral surface of a dry cell battery (50) comprising:

   an oriented, shrinkable, transparent surface film (3) as sole film layer of the adhesive label (1),

   an imprint (5) which is applied directly to the underside of the surface film (3), in particular pretreated with an adhesion promoter or in particular provided with an adhesion-promoting primer layer (3a), and is visible from the top of the adhesive label (1) and

   a layer of pressure-sensitive adhesive (13) located beneath the imprint (5), the adhesive label (1) having first edge portions (19) which can be superimposed so as to overlap along a generating line of the peripheral surface of the battery (50) and second edge portions (17) which project beyond end faces (51) of the battery (50) and rest on the end faces (51) after the shrinkage of the surface film (3),

   characterised in that a layer (21) which rests directly on the imprint (5) and on the partial areas of the surface film (3) free from the imprint (5), is applied from the liquid or semi-liquid phase and forms a barrier against the immigration of solvent from the layer of pressure-sensitive adhesive (13) or from electrolyte present on the battery (50) into the imprint (5) is arranged between the imprint (5) and the layer of pressure-sensitive adhesive (13).
2. Adhesive label according to claim 1, characterised in that the barrier layer (21) carries the layer of pressure-sensitive adhesive (13) directly on its underside.
3. Adhesive label according to claim 1, characterised in that the barrier layer (21) is designed as a laminating layer and connects a metal layer (11) to the imprint (5).
4. Adhesive label according to claim 3, characterised in that the laminating layer forms a flexible connection between the imprint (5) and the metal layer (7).
5. Adhesive label according to claim 3 or 4, characterised in that the laminating layer adheres more strongly than the layer of pressure-sensitive adhesive (13).
6. Adhesive label according to one of the preceding claims, characterised in that the barrier layer is cured by a chemical reaction, in particular between binder and hardener components, radiation or/and evaporation of solvents.
7. Adhesive label according to one of the preceding claims, characterised in that at least one layer which is visible from above through the imprint (5) is coloured.
8. Adhesive label according to one of the preceding claims, characterised in that the imprint (5) is imprinted onto the surface film (3) in printing inks of a printing ink system based on organic solvents or of a photocatalytic printing ink system free from solvents by laterally reversed counter printing.
9. Adhesive label according to one of the preceding claims, characterised in that the surface film (3) is formed from oriented rigid PVC, polypropylene, polystyrene, polyamide, in particular having a thickness of 20 to 70 micrometers, or from polyethylene terephthalate or polycarbonate, in particular having a thickness of 10 to 60 micrometers.
10. Dry cell battery with an adhesive label according to one of claims 1 to 9.

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