Heat-shrinkable label

Abstract

The utility model discloses a thermal shrinkage label which comprises a base material layer, a printed image-text layer and a color developing coating are arranged on the two sides of the base material layer respectively, the area of the color developing coating is smaller than that of the printed image-text layer, a protective coating is arranged on one side of the base material layer, and the protective coating and the printed image-text layer are located on the two sides of the base material layer respectively. A protective cavity is formed between the protective coating and the base material layer, the color developing coating is completely located in the protective cavity and located between the base material layer and the protective coating, and the base material layer is a transparent base material layer. Compared with the prior art, the shrinkage label has the following beneficial effects that the coating amount of the color developing coating and the protective coating is reduced, the adhesive force of the protective coating is improved, and the protective coating is utilized to form a closed and independent protective cavity on the base material layer to protect the color developing coating, so that the color developing coating is more stable.

Description

Technical Field

[0001] The utility model relates to the field of packaging materials, in particular to a heat shrinkable label. Background Art

[0002] The heat shrinkable film label is a commonly used label at present. When the heat shrinkable film label is heated (about 70°C to 90°C) during the label pasting process, the shrink label will quickly shrink along the outer contour of the container and closely adhere to the surface of the container. The structure of the currently adopted heat shrinkable label is as shown in the patent publication document CN201800287U. Since the heat shrinkable label of this structure does not have a color display coating, the content of the thermal printing cannot be displayed after the thermal printing of this structure of heat shrinkable label. Content of the Utility Model

[0003] Aiming at the above problems, the utility model provides a heat shrinkable label, in which the printed pattern layer and the color display layer are respectively arranged on both sides of the base material layer, and the exposed edges of the color display coating are avoided, so as to fully protect the color display coating. After thermal printing is carried out on the protective coating, the printed content can be permanently displayed.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A heat shrinkable label includes a base material layer, a printed graphics layer and a color display coating are respectively arranged on both sides of the base material layer, the area of the color display coating is smaller than that of the printed graphics layer, a protective coating is arranged on one side of the base material layer, the protective coating and the printed graphics layer are respectively located on both sides of the base material layer, a protection cavity is formed between the protective coating and the base material layer, the color display coating is completely located in the protection cavity, and the color display coating is located between the base material layer and the protective coating.

[0006] In this heat shrinkable label, a protection cavity is formed by the protective coating and the base material layer, the color display coating is located in the protection cavity, and the base material layer and the protective coating play a full protection role on the color display coating. When relevant information is printed on the protective layer by thermal printing, the printed information can be displayed by means of the color display coating, and since the color display coating is located in the protection cavity, the color display coating will not be worn and can permanently display the information printed by thermal printing.

[0007] At the same time, in this shrink label, a part of the protective coating is directly attached to the base material, which can improve the adhesion strength of the protective coating itself.

[0008] To sum up, in this label, the printed pattern layer and the color display layer are respectively arranged on both sides of the base material layer, and the exposed edges of the color display coating are avoided, so as to fully protect the color display coating. After thermal printing is carried out on the protective coating, the printed content can be permanently displayed.

[0009] Optionally, the substrate layer is a double-sided corona film.

[0010] Optionally, the substrate layer is a longitudinally shrink-oriented film.

[0011] Optionally, the substrate layer is a PVC film or a PETG film.

[0012] Optionally, the thickness of the substrate layer is 20 μm - 60 μm.

[0013] Optionally, the thickness of the printed graphic layer is 1 μm - 20 μm.

[0014] Optionally, the coating amount of the color-developing coating is 2.3 - 3.2 g / m 2 .

[0015] Optionally, the coating amount of the protective coating is 1.0 - 2.0 g / m 2 .

[0016] The beneficial effects of the present utility model are as follows: The printed pattern layer and the color-developing layer are respectively arranged on both sides of the substrate layer, and the end edges of the color-developing coating are avoided from being exposed, realizing full protection of the color-developing coating. After thermal printing on the protective coating, the printed content can be permanently displayed. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a heat-shrinkable label.

[0018] Each reference numeral in the figure is: 1, protective coating; 2, color-developing coating; 3, substrate layer; 4, printed graphic layer. Detailed Embodiments

[0019] The following will describe the present utility model in detail with reference to the drawings.

[0020] As shown in the Figure 1 drawing, a heat-shrinkable label includes a substrate layer 3. A printed graphic layer 4 and a color-developing coating 2 are respectively arranged on both sides of the substrate layer 3. The area of the color-developing coating 2 is smaller than that of the printed graphic layer 4. A protective coating 1 is arranged on one side of the substrate layer 3. The protective coating 1 and the printed graphic layer 4 are respectively located on both sides of the substrate layer 3. A protection cavity is formed between the protective coating 1 and the substrate layer 3. The color-developing coating 2 is completely located in the protection cavity. The color-developing coating 2 is located between the substrate layer 3 and the protective coating 1. The substrate layer is a transparent substrate layer.

[0021] In this kind of heat-shrinkable label, a protective cavity is formed by the protective coating and the substrate layer, and the color-developing coating is located in this protective cavity. The substrate layer and the protective coating provide sufficient protection for the color-developing coating. When relevant information is printed on the protective layer by thermal printing, the printed information can be displayed by means of the color-developing coating. And since the color-developing coating is located in the protective cavity, the color-developing coating will not be worn and can permanently display the information printed by thermal printing.

[0022] Meanwhile, in this kind of shrink label, a part of the protective coating is directly attached to the substrate, which can improve the adhesion strength of the protective coating itself.

[0023] To sum up, in this label, the printed pattern layer and the color-developing layer are respectively arranged on both sides of the substrate layer, and the exposed edges of the color-developing coating are avoided, realizing full protection of the color-developing coating. After thermal printing on the protective coating, the printed content can be permanently displayed.

[0024] Optionally, the substrate layer is a double-sided corona film.

[0025] Optionally, the substrate layer is a longitudinally shrink-oriented film.

[0026] Optionally, the substrate layer is a PVC film or a PETG film.

[0027] Optionally, the thickness of the substrate layer is 20μm - 60μm.

[0028] Optionally, the thickness of the printed graphic layer is 1μm - 20μm.

[0029] Optionally, the coating amount of the color-developing coating is 2.3 - 3.2g / m 2 .

[0030] Optionally, the coating amount of the protective coating is 1.0 - 2.0g / m 2 .

[0031] It is actually measured that for the heat-shrinkable label disclosed in this embodiment, even under the heating condition of a constant-temperature air-circulating drying oven at 120°C, there is still no obvious color difference in the thermal-sensitive area (the thermal-sensitive area includes the color-developing coating and the protective coating) within 20s. Therefore, it can adapt to the conventional use scenarios of steam heating shrinkage (70°C - 90°C).

[0032] Specifically, in this embodiment, the coating used for the color-developing coating can be one or more of colorless phenoquinones, azo compounds, benzoic acids, benzothiazoles, diazonium salts, phenolphthaleins, etc., and dispersants, antioxidants, anti-precipitants and other additives can be added to the coating formulation as needed during coating.

[0033] Specifically, in this embodiment, the coating material used for the protective coating can be one or more of acrylate, epoxy resin, polyurethane, isocyanate, metal chelate, silica filler, calcium carbonate filler, titanium dioxide filler, etc., and dispersants, antioxidants, anti-settling agents and other additives can be added to the coating formulation as needed during coating.

[0034] The above are only the preferred embodiments of the present invention, and thus do not limit the patent protection scope of the present invention. Any equivalent transformation made by using the content of the specification of the present invention, directly or indirectly applied in other related technical fields, shall be included in the protection scope of the present invention by the same token.

Claims

1. A heat-shrinkable label, characterized in that, It includes a substrate layer, on both sides of which a printed graphic layer and a color-developing coating are respectively provided. The area of the color-developing coating is smaller than that of the printed graphic layer. A protective coating is provided on one side of the substrate layer. The protective coating and the printed graphic layer are respectively located on both sides of the substrate layer. A protective cavity is formed between the protective coating and the substrate layer. The color-developing coating is completely located within the protective cavity and is located between the substrate layer and the protective coating.

2. The heat-shrinkable label according to claim 1, characterized in that The substrate layer is a double-sided corona film.

3. The heat-shrinkable label according to claim 1, wherein The substrate layer is a longitudinally shrink-oriented film.

4. The heat-shrinkable label according to claim 1, wherein The substrate layer is a PVC film or a PETG film.

5. The heat-shrinkable label according to claim 1, characterized in that, The thickness of the substrate layer is 20μm - 60μm.

6. The heat-shrinkable label according to claim 1, wherein, The thickness of the printed graphic layer is 1μm - 20μm.

7. The heat-shrinkable label according to claim 1, characterized in that, The coating amount of the color-developing coating is 2.3 - 3.2 g / m 2 .

8. The heat-shrinkable label according to claim 1, wherein The coating amount of the protective coating is 1.0 - 2.0 g / m 2 .

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