Thermal shrinkage single-layer battery label

Abstract

The utility model relates to the technical field of battery labels, in particular to a thermal shrinkage single-layer battery label. When a conventional heat-shrinkable double-layer battery label is used, the label is easy to warp. In order to solve the problems, the utility model provides the heat-shrinkable single-layer battery label which is of a layered structure and sequentially comprises a release film, an adhesive layer, a vacuum aluminum-plated layer, an ink layer and a heat-shrinkable film from bottom to top, and the overall thickness of the battery label is 40 + / -5 microns and is obviously lower than that of a conventional heat-shrinkable double-layer battery label. The problem that the ink layer of the heat-shrinkable single-layer battery label is easy to fall off or scrape is solved, and the problem that the conventional heat-shrinkable double-layer battery label is easy to warp during use is also solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery label technical field, concretely relates to a kind of heat shrinkage single-layer battery labels. BACKGROUND

[0002] The heat shrinkage single-layer battery label has the advantages of thin thickness and low cost, and is easy to warp when pasted on the outer surface of cylindrical battery, but the ink layer is easy to fall off or be scratched on the outermost surface.

[0003] The heat shrinkage double-layer battery label has the advantages that the ink layer and the aluminum plating layer are between the two layers of heat shrinkage films, and there is no problem of ink falling off or scratching, but the two layers of composite films need to be compounded together using composite glue, and the thickness is relatively thick, which is easy to warp when pasted on the outer surface of cylindrical battery. In addition, there is usually no anti-ink-off coating between the heat shrinkage film and the ink layer of the double-layer battery label, and when the battery label needs to be removed from the outer surface of the battery, the ink layer is easy to separate from the outermost heat shrinkage film, resulting in ink-off phenomenon. SUMMARY

[0004] The existing problem is that the conventional heat shrinkage double-layer battery label is easy to warp when used. To solve the above technical problems, the utility model provides a heat shrinkage single-layer battery label, which is a layered structure. The structure includes, from bottom to top, a release film, an adhesive layer, a vacuum aluminum plating layer, an ink layer, and a heat shrinkage film. An anti-residual adhesive coating is arranged between the adhesive layer and the vacuum aluminum plating layer. The thickness of the heat shrinkage single-layer battery label is 40±5 μm. The anti-residual adhesive coating is a coating formed by curing a hybrid acrylic emulsion. The anti-residual adhesive coating can prevent the adhesive layer from transferring to the surface of the steel shell of the cylindrical battery when the label is peeled off from the surface of the battery steel shell, which is called residual adhesive phenomenon or residual adhesive problem in the industry. Because the anti-residual adhesive coating contains a large number of carboxyl groups, the bonding force between the anti-residual adhesive coating and the aluminum layer is very strong, and the surface energy of the anti-residual adhesive coating is high. The adhesive layer and the anti-residual adhesive coating are both acrylic polymers, and the bonding force between them is also very strong.

[0005] Preferably, an aluminum plating primer layer is arranged between the ink layer and the vacuum aluminum plating layer. The aluminum plating primer layer is a coating formed by curing a high-transparency and high-barrier waterborne polyurethane resin. The primer layer can flatten the thickness difference of the ink layer and form a denser film on the surface of the ink layer. Without the aluminum plating primer layer, the metal luster effect of the label after vacuum aluminum plating is poor, and the vacuum aluminum plating layer is easy to fall off. The high-transparency and high-barrier waterborne polyurethane resin used in the utility model has a solvent mainly composed of water, which does not easily corrode and damage the ink layer when coated. In addition, the particle size of the high-transparency and high-barrier waterborne polyurethane resin is small, and the glass transition temperature is not higher than 35°C, so the film-forming property of the high-transparency and high-barrier waterborne polyurethane resin after coating is excellent, and a film with good gloss can be formed on the ink layer.

[0006] Preferably, the thickness of the aluminum plating primer layer is 0.5-3 μm.

[0007] Preferably, an anti-ink-off coating layer is further arranged between the heat shrinkable film layer and the ink layer.

[0008] The anti-ink-off coating layer mainly functions to improve the adhesion of the ink layer on the film substrate. The polymers of the chlorovinyl acetate resin, the polyester polymer, the polyurethane polymer and the acrylate polymer have high surface energy, good flexibility and high film coating strength after film formation, so that the ink layer and the film substrate have good bonding force.

[0009] Preferably, the thickness of the anti-ink-off coating layer is 0.3-1.5 μm.

[0010] Preferably, the thickness of the adhesive layer is 15-25 μm.

[0011] Preferably, the thickness of the vacuum aluminum plating layer is 0.2-0.3 μm.

[0012] Preferably, the thickness of the ink layer is 0.5-2 μm.

[0013] Preferably, the thickness of the heat shrinkable film is 30-40 μm.

[0014] Preferably, the thickness of the anti-residue coating layer is 0.3-1.5 μm.

[0015] The release film is a PET release film or a glassine release paper, and the release force between the release film and the adhesive layer is 1-15 g / 25 mm.

[0016] The adhesive layer is formed by curing one of a water-based pressure sensitive adhesive, a solvent-based pressure sensitive adhesive and a UV pressure sensitive adhesive.

[0017] The ink layer is formed by gravure printing of a solvent-based ink or a water-based ink.

[0018] The heat shrinkable film layer comprises a transparent PETG heat shrinkable film or a PVC heat shrinkable film, and the light transmittance is ≥ 90% and the haze is ≤ 6%.

[0019] The utility model has the following beneficial effects:

[0020] (1) The anti-residue layer is arranged between the adhesive layer and the vacuum aluminum plating layer, the interlayer bonding force between the anti-residue layer, the vacuum aluminum plating layer and the adhesive layer is strong, so that the battery label is not easy to leave residue on the surface of the battery when being torn off from the surface of the battery.

[0021] (2) The thickness of the battery label obtained by the utility model is similar to that of a conventional single-layer battery label, and the battery label is not easy to warp during use.

[0022] (3) The utility model discloses a plated aluminium primer between ink layer and vacuum aluminum layer is provided with, the uneven surface of ink layer is covered after being covered by plated aluminium primer and obtains the even coating surface, and it is convenient to obtain more dense vacuum aluminum layer,

[0023] (4) The utility model discloses setting up the anti-ink-off coating between heat shrinkage film and ink layer, and the surface energy is high, and the darcy value is greater than 50, and the interlayer combination between the anti-ink-off coating and heat shrinkage film, ink layer is all stronger, can prevent the battery label from tearing off from the battery outer surface, prevents the interlayer peeling of ink layer and heat shrinkage film, that is, the ink-off problem. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 : it is the structure schematic diagram of a kind of heat shrinkage single-layer battery label provided by the utility model.

[0025] Fig. 2 : it is the structure schematic diagram of a kind of heat shrinkage single-layer battery label provided by the utility model.

[0026] Fig. 3 : it is the structure schematic diagram of a kind of heat shrinkage single-layer battery label provided by the utility model.

[0027] In the drawing: 1. release film, 2. adhesive layer, 3. vacuum aluminum layer, 4. ink layer, 5. heat shrinkage film, 6. anti-residual glue coating, 7. plated aluminium primer, 8. anti-ink-off coating. DETAILED DESCRIPTION

[0028] The utility model is specifically illustrated in detail below in combination with embodiment. But should understand, the following embodiment is only to the example of the embodiment of the utility model, and is not the scope limitation of the utility model.

[0029] As Figs. 1-3 Shown, it is a kind of heat shrinkage single-layer battery label provided by the utility model, for laminar structure, its structure from below to above includes release film, adhesive layer, vacuum aluminum layer, ink layer and heat shrinkage film in turn, the adhesive layer is provided with anti-residual glue coating between vacuum aluminum layer, the thickness of the heat shrinkage single-layer battery label is 40±5 μm. The anti-residual glue coating is the coating formed by hybrid acrylic emulsion (Kosai water-based acrylic emulsion HP-1000) solidification.

[0030] In a specific embodiment, plated aluminium primer is provided between the ink layer and the vacuum aluminum layer. The plated aluminium primer is a coating formed by solidification of a high-transparency and high-barrier water-based polyurethane resin (water-based bright polyurethane 3036 from Jiangmen Chuanda New Material Technology Co., Ltd.).

[0031] In a specific embodiment, the thickness of the plated aluminium primer is 0.5-3 μm.

[0032] In a specific embodiment, an anti-ink-off coating layer is further provided between the heat shrinkable film layer and the ink layer. The anti-ink-off coating layer is a coating layer formed by curing one of chlorovinyl acetate resin, polyester polymer, polyurethane polymer, and acrylate polymer.

[0033] The coating for the anti-ink-off coating layer can be a ternary chlorovinyl acetate resin E22 / 48A from Germany Wacker or an adhesion promoting adhesion aid LHD-109 from Shenzhen Lihengda Technology Co., Ltd.

[0034] In a specific embodiment, the thickness of the anti-ink-off coating layer is 0.3-1.5 μm.

[0035] In a specific embodiment, the thickness of the adhesive layer is 15-25 μm.

[0036] In a specific embodiment, the thickness of the vacuum aluminum plating layer is 0.2-0.3 μm.

[0037] In a specific embodiment, the thickness of the ink layer is 0.5-2 μm.

[0038] In a specific embodiment, the thickness of the heat shrinkable film is 30-40 μm.

[0039] In a specific embodiment, the thickness of the anti-residual coating layer is 0.3-1.5 μm.

[0040] The release film is a PET release film or a Grafix release paper, and the release force between the release film and the adhesive layer is 1-15 g / 25 mm.

[0041] The adhesive layer is formed by curing one of water-based pressure sensitive adhesive, solvent-based pressure sensitive adhesive, and UV pressure sensitive adhesive.

[0042] The ink layer is formed by gravure printing of solvent-based ink or water-based ink.

[0043] The heat shrinkable film layer comprises a transparent PETG heat shrinkable film or a PVC heat shrinkable film, and the light transmittance is ≥ 90% and the haze is ≤ 6%.

[0044] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A heat shrinkable single layer battery label, in a layered structure, characterized in that, From bottom to top, the hot shrinkage single-layer battery label comprises a release film, an adhesive layer, a vacuum aluminum plating layer, an ink layer and a heat shrinkage film in sequence, a residual adhesive prevention coating is arranged between the adhesive layer and the vacuum aluminum plating layer, the overall thickness of the hot shrinkage single-layer battery label is 40±5 μm, and the thickness of the release film and the adhesive layer is not included in the overall thickness.

2. A heat-shrinkable single-ply battery label according to claim 1, wherein, An aluminum plating primer layer is arranged between the ink layer and the vacuum aluminum plating layer.

3. A heat-shrinkable single-ply battery label according to claim 2, wherein, The thickness of the aluminum plating primer layer is 0.5-3 μm.

4. The heat-shrinkable single-ply battery label of claim 1, wherein, A deinking prevention coating is further arranged between the heat shrinkage film layer and the ink layer.

5. A heat-shrinkable single-ply battery label according to claim 4, wherein, The thickness of the deinking prevention coating is 0.3-1.5 μm.

6. The heat-shrinkable single-ply battery label of claim 1, wherein, The thickness of the adhesive layer is 15-25 μm.

7. The heat-shrinkable single-ply battery label of claim 1, wherein, The thickness of the vacuum aluminum plating layer is 0.2-0.3 μm.

8. The heat-shrinkable single-ply battery label of claim 1, wherein, The thickness of the ink layer is 0.5-2 μm.

9. The heat-shrinkable single-ply battery label of claim 1, wherein, The thickness of the heat shrinkage film is 30-40 μm.

10. The heat-shrinkable single-ply battery label of claim 1, wherein, The thickness of the residual adhesive prevention coating is 0.3-1.5 μm.

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