Removable wash-off label

Abstract

The utility model discloses a kind of removable water washing label, including PETG surface layer, ink adhesion layer, UV curing pressure sensitive adhesive layer, silicon oil release layer and bottom layer, wherein, ink adhesion layer, PETG surface layer, UV curing pressure sensitive adhesive layer, silicon oil release layer, bottom layer are sequentially stacked from top to bottom by above-mentioned mode.The utility model removable water washing label overall structure realizes the goal of environmental protection, easy to peel and recyclable.When label needs to be removed, the label of the utility model is placed in 70-90 degrees Celsius high-temperature water, PETG surface layer rapidly shrinks, UV curing pressure sensitive adhesive layer can rapidly separate from the pasted object, so that the surface of the pasted object is free of glue water residue, so that the pasted object can be quickly recycled and reused.In addition, the removable water washing label of the utility model is also provided with ink adhesion layer, which is a corona treatment layer or a printed pre-coating layer.

Description

Technical Field

[0001] This utility model relates to the field of label technology, specifically to a removable washable label. Background Technology

[0002] Labels are typically affixed to glass or ceramic items to identify relevant product information. The film materials used for these labels usually include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and polyester (PET). However, these film materials have poor environmental performance and recyclability; moreover, existing labels are difficult to remove once affixed to items, making it difficult to quickly recycle and reuse the items. Furthermore, the surface of existing labels is not conducive to ink coloring during the printing process. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a removable washable label that can solve at least one of the aforementioned technical problems.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a removable washable label, comprising: a PETG top layer, an ink adhesion layer, a UV-cured pressure-sensitive adhesive layer, a silicone oil anti-stick layer, and a bottom layer, wherein the ink adhesion layer, the PETG top layer, the UV-cured pressure-sensitive adhesive layer, the silicone oil anti-stick layer, and the bottom layer are stacked sequentially from top to bottom, and the ink adhesion layer is a corona-treated layer or a pre-printed coating layer.

[0007] Preferably, the thickness of the UV-cured pressure-sensitive adhesive layer is 1-50 μm.

[0008] Preferably, the thickness of the bottom layer is 20-70 μm.

[0009] Preferably, the thickness of the PETG surface layer is 20-60 μm.

[0010] Preferably, the thickness of the printed pre-coating layer is 0.1-10 μm.

[0011] Preferably, the thickness of the silicone oil anti-stick layer is 0.1-0.8 μm.

[0012] (III) Beneficial Effects

[0013] Compared with existing technologies, this invention provides a removable washable label with the following advantages: The film material of this removable washable label uses a PETG surface layer, which has good environmental performance and recyclability; simultaneously, the UV-cured pressure-sensitive adhesive layer provides good adhesion to the label and leaves no adhesive residue after curing, while the bottom layer facilitates the use and peeling of the label. Through the above methods, the overall structure of this removable washable label achieves the goals of environmental protection, easy peeling, and recyclability. When this invention is used as a product label and pasted onto glass or ceramic objects, and the label needs to be removed, placing the label in 70-90 degree Celsius hot water causes the PETG surface layer to shrink rapidly, and the UV-cured pressure-sensitive adhesive layer can quickly detach from the object, leaving no adhesive residue on the surface and enabling rapid recycling of the object. In addition, this removable washable label also has an ink adhesion layer, which is a corona-treated layer or a pre-printed coating layer, facilitating ink coloring on the label surface. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the removable wash label of this utility model.

[0015] The labels in the diagram are: 1 Ink adhesion layer, 2 PETG top layer, 3 UV-cured pressure-sensitive adhesive layer, 4 Silicone oil anti-stick layer, and 5 Base layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a removable washable label, including a PETG surface layer 2, an ink adhesion layer 1, a UV-cured pressure-sensitive adhesive layer 3, a silicone oil anti-stick layer 4, and a bottom layer 5, wherein the ink adhesion layer 1, the PETG surface layer 2, the UV-cured pressure-sensitive adhesive layer 3, the silicone oil anti-stick layer 4, and the bottom layer 5 are stacked sequentially from top to bottom.

[0018] It is understood that the above-mentioned PETG surface layer 2 is made of PETG (polyethylene terephthalate-1,4-cyclohexanediethanol ester). PETG is a thermoplastic polyester with good transparency, chemical resistance and mechanical properties. It is easy to print and has good environmental performance and recyclability. PETG is a non-crystalline copolyester formed by the condensation of three monomers, terephthalic acid (TPA), ethylene glycol (EG) and 1,4-cyclohexanediethanol (CHDM), through transesterification. The main molecular chain of PETG is composed of alternating ester bonds connecting terephthalic acid units, ethylene glycol units, and 1,4-cyclohexanediethanol units. Its specific structure can be represented as: […-O-C6H4-CO-O-CH2-CH2-O-CO-C6H4-CO-O-CH2-C6H10-CH2-O-]n, where C6H4 is the benzene ring structure formed by terephthalic acid, C6H10 is the cyclohexane structure formed by 1,4-cyclohexanediethanol, and n represents the degree of polymerization.

[0019] During manufacturing, PETG material is typically stretched or injection molded, causing the molecular chains to align in a specific direction (orientation). This orientation causes the material to shrink when heated, as the molecular chains attempt to return to a more natural, disordered state. PETG undergoes heating and cooling during processing, creating internal stress; when heated again, this internal stress is released, causing the material to shrink. If the PETG material is biaxially stretched during manufacturing (e.g., in film production), the molecular chains orient in both directions; when heated, the material shrinks simultaneously in both directions to release internal stress and restore equilibrium. The PETG surface layer 2 of this invention preferably uses a biaxially shrinkable PETG film, meaning the PETG is biaxially stretched during manufacturing, to improve the removal efficiency and ease of removal of the removable washable label. The thickness of the PETG surface layer 2 is preferably 20-60 μm.

[0020] Furthermore, this invention facilitates ink coloring on the label surface through the aforementioned ink adhesion layer 1. Specifically, the ink adhesion layer 1 is a corona treatment layer or a printing pre-coating layer. A corona treatment layer refers to a surface layer with specific properties formed on the surface of an object through a corona treatment process. It is commonly used for materials such as plastic films and wire insulation layers to improve their surface properties. This invention forms a corona treatment layer on the surface of the PETG surface layer 2, causing the molecular structure of the PETG surface layer 2 to rearrange, generating more polar sites, making it easier for printing ink to adhere. The printing pre-coating layer is a special functional coating pre-applied to the surface of a printing substrate (such as paper, plastic film, metal foil, etc.). This invention optimizes the printability of the PETG surface layer 2 by setting a printing pre-coating layer, making the printing process smoother and significantly improving the ink coloring effect. Specifically, the printing pre-coating layer can use an ink-receptive resin (such as acrylic resin or polyurethane resin) to quickly absorb ink. Preferably, the thickness of the pre-coated layer is 0.1-10 μm, which ensures surface uniformity while avoiding excessive increase in the thickness or weight of the label substrate.

[0021] Preferably, the thickness of the UV-cured pressure-sensitive adhesive layer 3 is 1-50 μm. This thickness range not only provides sufficient adhesive strength for the removable washable label of this invention, but also ensures that no adhesive residue is left when the label is peeled off. During preparation, the UV-cured pressure-sensitive adhesive is coated onto a silicone oil anti-stick layer, and UVC band light curing is used to form the UV-cured pressure-sensitive adhesive layer 3, wherein the curing power is preferably greater than 36 J / cm². 2 .

[0022] Preferably, the thickness of the bottom layer 5 is 20-70 μm to provide sufficient support and protection for the label. The bottom layer 5 may include a backing paper, preferably glassine paper, which has high tensile strength and is not easily damaged. Alternatively, the bottom layer 5 may also include a backing paper and a backing film, with the backing film disposed on the backing paper and serving to protect the backing paper.

[0023] Furthermore, the material of the aforementioned silicone oil anti-stick layer 4 is silicone oil. The silicone oil anti-stick layer 4 can provide release and anti-stick properties for the label, making it easy to peel the UV-cured pressure-sensitive adhesive layer 3 from the bottom layer 5. The thickness of the silicone oil anti-stick layer 4 is preferably 0.1-0.8 μm.

[0024] It is understood that when using the removable washable label of this utility model, the bottom layer 5 and the silicone oil anti-stick layer 4 are peeled off, and the label of this utility model is pasted onto glass or ceramic objects through the UV-cured pressure-sensitive adhesive layer 3; when the label needs to be removed, the label of this utility model is placed in water at a high temperature of 70-90 degrees Celsius. The PETG surface layer 2 shrinks rapidly, and the UV-cured pressure-sensitive adhesive layer 3 can quickly detach from the object, so that there is no glue residue on the surface of the object, thereby enabling the object to be quickly recycled and reused.

[0025] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A removable wash label, characterized in that, include: The product comprises a PETG top layer, an ink adhesion layer, a UV-cured pressure-sensitive adhesive layer, a silicone oil anti-stick layer, and a bottom layer, wherein the ink adhesion layer, the PETG top layer, the UV-cured pressure-sensitive adhesive layer, the silicone oil anti-stick layer, and the bottom layer are stacked sequentially from top to bottom, and the ink adhesion layer is a corona-treated layer or a pre-printed coating layer.

2. The removable washable label according to claim 1, characterized in that: The thickness of the UV-cured pressure-sensitive adhesive layer is 1-50 μm.

3. The removable washable label according to claim 1, characterized in that: The thickness of the bottom layer is 20-70 μm.

4. The removable washable label according to claim 1, characterized in that: The thickness of the PETG surface layer is 20-60 μm.

5. The removable washable label according to claim 1, characterized in that: The thickness of the printed pre-coating layer is 0.1-10 μm.

6. The removable washable label according to claim 1, characterized in that: The thickness of the silicone oil anti-stick layer is 0.1-0.8 μm.

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