High-performance environment-friendly label and preparation method thereof

Abstract

The invention discloses a high-performance environment-friendly label and a preparation method thereof, the high-performance environment-friendly label comprises a PETG surface layer, a UV glue layer and a bottom paper layer, the UV glue layer is attached to the bottom surface of the PETG surface layer, and the bottom paper layer is attached to the UV glue layer. The high-performance environment-friendly label provided by the invention is reasonable in structure, the PETG surface layer has excellent environment-friendly performance and recoverability, meanwhile, the UV glue layer provides good bonding performance and has no residual glue problem after curing, and the bottom paper layer facilitates use and stripping of the label. According to the whole structure, the purposes of environmental protection, easy stripping and recoverability are achieved. When being used as a commodity label to be pasted on some appliances such as glass or ceramics and the like and needing to be removed, the PETG surface layer rapidly shrinks and the UV glue layer is immediately separated from the appliances when the PETG surface layer and the UV glue layer are placed in 80-85 DEG C high-temperature water. No glue is left on the surface of the appliance, and the appliance is clean and tidy and can be recycled, so that the labor cost, the electric charge and the water resource are saved, and the attached object is quickly recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of labels, and in particular to a high-performance environmentally friendly label and a preparation method thereof. Background Art

[0002] Film materials used for labels include petroleum-derived polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyester (PET), etc. However, since they are made from petroleum, they consume a lot of energy and produce a lot of carbon dioxide. In addition to polluting the environment during the manufacturing process, they also leak out toxic substances during use, which is harmful to the human body. In addition, once the existing labels are pasted, it is very difficult to remove them, making it difficult to quickly recycle and reuse the objects they are pasted on. In addition, substances that are harmful to the environment will be discharged during the disposal process after use. Summary of the invention

[0003] In view of the above-mentioned shortcomings, the present invention aims to provide a high-performance environmentally friendly label and a preparation method thereof, which is easy to detach, has no glue residue on the surface, is clean and tidy, and can be recycled.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0005] A high-performance environmentally friendly label comprises a PETG surface layer, a UV glue layer and a bottom paper layer, wherein the UV glue layer is attached to the bottom surface of the PETG surface layer, and the bottom paper layer is attached to the UV glue layer.

[0006] As a preferred embodiment of the present invention, the main molecular structure of the material of the PETG surface layer is:

[0007]

[0008] As a preferred embodiment of the present invention, the thickness of the PETG surface layer is 40 to 60 microns. The appropriate thickness ensures the strength and durability of the label, while not being too heavy to affect the use. In addition, the PETG surface layer within this thickness range is also more easily recycled.

[0009] As a preferred solution of the present invention, the material of the PETG surface layer is biaxially stretched during the manufacturing process, so that the label can be more efficiently and easily removed.

[0010] As a preferred solution of the present invention, the material of the PETG surface layer is uniaxially stretched during the manufacturing process, and the process is simple and easy to implement.

[0011] As a preferred embodiment of the present invention, the thickness of the UV glue layer is 14 to 15 micrometers. The UV glue layer in this thickness range can provide sufficient bonding strength and ensure that no glue residue is left when peeling.

[0012] As a preferred solution of the present invention, the thickness of the base paper layer is 55 to 72 microns, which can provide sufficient support and protection to prevent the label from being damaged during transportation and use, and is also easy to peel off.

[0013] As a preferred solution of the present invention, the base paper layer is glassine paper, which has good strength and toughness and is easy to peel off.

[0014] The beneficial effects of the present invention are as follows: the high-performance environmentally friendly label provided by the present invention has a reasonable structure, the PETG surface layer has excellent environmental performance and recyclability, while the UV glue layer provides good adhesion performance and no residual glue problem after curing, and the bottom paper layer is convenient for the use and peeling of the label. The overall structure achieves the goals of environmental protection, easy peeling and recyclability. The present invention is pasted on some glass or ceramic utensils as a commodity label. When it needs to be removed, it is placed in 80-85 degree high temperature water, the PETG surface layer shrinks rapidly, and the UV glue layer immediately detaches from the utensil. There is no glue residue on the surface of the utensil, which is clean and tidy and can be recycled and reused, thereby saving labor costs, electricity costs and water resources, and realizing the rapid recycling and reuse of the labeled objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention. DETAILED DESCRIPTION

[0016] Example: See Figure 1 An embodiment of the present invention provides a high-performance environmentally friendly label, which includes a PETG surface layer 1, a UV glue layer 2 and a base paper layer 3.

[0017] During preparation, it comprises the following steps:

[0018] (1) UV glue is coated on the PETG surface layer 1, and a 1500-4500 watt UVLED light source is used for irradiation curing; the curing process is performed under nitrogen protection, which can further improve the curing quality and stability of the UV glue; the thickness of the PETG surface layer 1 is preferably 40 to 60 microns. The appropriate thickness ensures the strength and durability of the label, while not being too thick to affect its use. In addition, the PETG surface layer 1 within this thickness range is also easier to recycle and reuse. The thickness of the UV glue layer 2 is preferably 14 to 15 microns. The UV glue layer 2 within this thickness range can provide sufficient bonding strength and ensure that no glue residue is left when peeling;

[0019] (2) After the UV glue is cured, a UV glue layer 2 is formed on the bottom surface of the PETG surface layer 1, so that the UV glue layer 2 is attached to the bottom surface of the PETG surface layer 1; the UV glue layer 2 is removable and cured into a mirror effect by a UV lamp. It has low viscosity but will not transfer. When the object to be attached reaches the trigger temperature, the UV glue layer 2 can also be easily separated from the object to be attached without residual glue. The thickness of the base paper layer 3 is 55 to 72 microns. It can provide sufficient support and protection to prevent the label from being damaged during transportation and use. At the same time, it is also easy to peel off; in this embodiment, the base paper layer 3 is preferably 60 grams of glassine paper, which has high tensile strength, can withstand multiple folding and mechanical processing, is not easy to break, is suitable for long-term storage and logistics transportation, has extremely high surface smoothness, and is easy to peel off;

[0020] (3) Adhere glassine paper to the UV glue layer 2 to form a base paper layer 3, so that the base paper layer 3 is attached to the UV glue layer 2 to obtain a high-performance environmentally friendly label.

[0021] The PETG (polyethylene terephthalate-to-1,4-cyclohexanedimethanol) material of the PETG surface layer 1 is a thermoplastic polyester with good transparency, chemical resistance and mechanical properties. During the manufacturing process, the PETG material is usually stretched or injection molded, resulting in the molecular chains being arranged (oriented) in a specific direction. This orientation causes the material to exhibit shrinkage behavior when heated because the molecular chains try to return to a more natural, disordered state. PETG undergoes heating and cooling during processing, forming certain internal stresses. When heated again, these internal stresses are released, causing the material to shrink. If the PETG material is biaxially stretched during the manufacturing process (for example, in film production), the molecular chains are oriented in two directions. When heated, the material shrinks in both directions simultaneously to release internal stress and restore equilibrium. The glass transition temperature (Tg) of PETG is usually around 80°C. When the temperature approaches or exceeds Tg, the activity of the molecular chains is enhanced, and the shrinkage phenomenon is more obvious. In the present embodiment, the material of the PETG surface layer 1 is preferably biaxially stretched during the manufacturing process. In other embodiments, the material of the PETG surface layer 1 can also be unidirectionally stretched during the manufacturing process. The processing technology of the unidirectional shrinkage substrate is relatively simple, and the processing of the bidirectional shrinkage substrate is relatively complex. The advantage of bidirectional shrinkage over unidirectional shrinkage is that the label is more efficient and easier to fall off.

[0022] When in use, tear off the backing paper layer 3, and then stick it on the surface of glass or ceramics through the UV glue layer 2; when the glass or ceramics need to be recycled, put the adhered object in 80-85 degree high temperature water, at this time, the PETG surface layer 1 will shrink rapidly, so that the UV glue layer 2 will immediately separate from the adhered object, so as to facilitate the recycling and reuse of glass or ceramics.

[0023] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention. Other labels and preparation methods that are the same or similar to the above are all within the scope of protection of the present invention.

Claims

1. A high-performance environmentally friendly label, characterized in that: It comprises a PETG surface layer, a UV glue layer and a bottom paper layer, wherein the UV glue layer is attached to the bottom surface of the PETG surface layer, and the bottom paper layer is attached to the UV glue layer.

2. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The main molecular structure of the material of the PETG surface layer is:

3. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The thickness of the PETG surface layer is 40 to 60 microns.

4. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The material of the PETG surface layer is biaxially stretched during the manufacturing process.

5. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The material of the PETG surface layer is stretched unidirectionally during the manufacturing process.

6. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The thickness of the UV glue layer is 14 to 15 microns.

7. The method for preparing a high-performance environmentally friendly label according to claim 1, characterized in that: The thickness of the base paper layer is 55 to 72 microns.

8. The method for preparing a high-performance environmentally friendly label according to claim 1 or 7, characterized in that: The bottom paper layer is glassine paper.

9. A method for preparing a high-performance environmentally friendly label according to any one of claims 1 to 8, characterized in that: It includes the following steps: (1) Apply UV glue on the PETG surface layer and use a 1500-4500 watt UVLED light source for irradiation and curing; (2) forming a UV glue layer on the bottom surface of the PETG surface layer after the UV glue is cured; (3) Adhere glassine paper to the UV glue layer to form a base paper layer to obtain a high-performance environmentally friendly label.

10. The preparation method according to claim 9, characterized in that: The curing process in step (1) is carried out under nitrogen protection.

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