Double-sided adhesive tape and label sheet roll

Abstract

The application discloses a double-sided adhesive tape and a label paper roll, and the double-sided adhesive tape is used for the label paper roll, wherein the double-sided adhesive tape adopts a cotton paper base material layer, manual slitting of the double-sided adhesive tape is facilitated in production and manufacturing of the label paper roll, two sides of the thickness direction of the cotton paper base material layer are respectively provided with a first adhesive layer and a second adhesive layer, the first adhesive layer is used for adhesively connecting a tube core of the label paper roll, the second adhesive layer is used for adhesively connecting label paper of the label paper roll, and the peeling force of the first adhesive layer is greater than that of the second adhesive layer, so that when the label paper of the label paper roll is consumed, the tail end of the label paper can be smoothly separated from the double-sided adhesive tape and the tube core. In the embodiment of the application, the double-sided adhesive tape is provided with at least one isolation oil layer, the isolation oil layer can isolate the first adhesive layer and the second adhesive layer, and migration of the first adhesive layer and the second adhesive layer into the cotton paper base material layer is avoided.

Description

Technical Field

[0001] This application relates to the field of adhesive technology, and more particularly to a double-sided adhesive tape and a label roll. Background Technology

[0002] In printers, the label paper in the label roll is gradually consumed as printing continues. Sensors are typically installed along the paper feed path to determine when the label paper is depleted. However, when the label roll reaches the end, the end of the label paper may not easily detach from the core, preventing the sensor from detecting the paper-free state in time, and the printer fails to stop promptly. At this point, the printhead assembly continues to heat the ribbon, causing it to break at high temperatures. This not only wastes ribbon material but may also lead to overheating damage to the printhead assembly. Utility Model Content

[0003] This application provides a double-sided adhesive tape and a label paper roll, which can solve the problem that the end of the label paper is difficult to detach from the core, causing the printer to fail to detect the paperless state in time, resulting in the ribbon overheating and breaking.

[0004] In a first aspect, embodiments of this application provide a double-sided adhesive tape for label rolls. The double-sided adhesive tape includes a cotton paper substrate layer, a first adhesive layer, a second adhesive layer, and at least one layer of release oil. The first adhesive layer is disposed on one side of the cotton paper substrate layer in the thickness direction and is used to bond and connect the core of the label roll. The second adhesive layer is disposed on the other side of the cotton paper substrate layer in the thickness direction and is used to bond and connect the label paper of the label roll. The peel force of the first adhesive layer is greater than the peel force of the second adhesive layer. In the thickness direction of the cotton paper substrate layer, the release oil layer is disposed between the cotton paper substrate layer and the first adhesive layer, and / or, the release oil layer is disposed between the cotton paper substrate layer and the second adhesive layer, and the release oil layer is configured to isolate the first adhesive layer and the second adhesive layer.

[0005] In some embodiments, the isolation oil layer is a UV-curable ink layer, and the isolation oil layer includes at least one of a polyurethane acrylate ink layer, an epoxy acrylate ink layer, or a polyester acrylate ink layer.

[0006] In some embodiments, the thickness of the insulating oil layer is H in the thickness direction of the cotton paper substrate layer, where H satisfies: 3μm≤H≤10μm.

[0007] In some embodiments, the basis weight of the cotton paper substrate layer is G, where G satisfies: 60g / m2≤G≤80g / m2; and / or, the thickness of the cotton paper substrate layer is S, where S satisfies: 0.05mm≤S≤0.08mm.

[0008] In some embodiments, the peel force of the first adhesive layer is F1, which satisfies: 7N≤F1≤8N; and / or, in the thickness direction of the cotton paper substrate layer, the thickness of the first adhesive layer is D1, which satisfies: 18μm≤D1≤30μm.

[0009] In some embodiments, the first adhesive layer is a pressure-sensitive adhesive layer, and the first adhesive layer is an acrylic adhesive layer, a rubber adhesive layer, or an organosilicon adhesive layer.

[0010] In some embodiments, the peel force of the second adhesive layer is F2, and F1 satisfies: 2N≤F2≤3N; and / or, in the thickness direction of the cotton paper substrate layer, the thickness of the second adhesive layer is D2, and D2 satisfies: 15μm≤D2≤30μm.

[0011] In some embodiments, the second adhesive layer is an acrylic adhesive layer, a removable rubber adhesive layer, or a synthetic rubber adhesive layer.

[0012] In some embodiments, the peel force of the first adhesive layer is F1, the peel force of the second adhesive layer is F2, and F1 and F2 satisfy: F1-F2≥5N.

[0013] In some embodiments, the double-sided tape further includes at least one release paper layer, the release paper layer being bonded to the first adhesive layer; and / or, the release paper layer being bonded to the second adhesive layer, the release paper layer being used to isolate the first adhesive layer and the second adhesive layer from the external environment; the double-sided tape is configured to be housed into multiple layers of tape units, the release paper layer of each layer of the tape unit being in contact with the tape unit of the adjacent layer.

[0014] Secondly, embodiments of this application also provide a label paper roll, the label paper roll including a core, label paper and the double-sided adhesive tape, the first adhesive layer of the double-sided adhesive tape being bonded to the core of the label paper roll, and the second adhesive layer being bonded to the end of the label paper, the label paper being wound around the core.

[0015] In some embodiments, along the extension direction of the label paper, the length of the end portion of the label paper adhered to the second adhesive layer is A, where A satisfies: 5mm ≤ A ≤ 10mm.

[0016] In some embodiments, along the extension direction of the label paper, the end edge of the label paper is flush with the edge of the double-sided tape, or the end edge of the label paper extends beyond the edge of the double-sided tape.

[0017] This application discloses a double-sided adhesive tape and a label roll. The double-sided adhesive tape is used in label rolls and employs a cotton paper substrate layer. The double-sided adhesive tape is manually cut and applied during the manufacturing process of the label roll. A first adhesive layer and a second adhesive layer are respectively provided on both sides of the cotton paper substrate layer. By controlling the difference in peel force between the two adhesive layers, a stable connection is formed between the first adhesive layer and the core, and a relatively easy-to-peel connection is formed between the second adhesive layer and the label paper. In this embodiment, the double-sided adhesive tape is provided with at least one insulating oil layer. This insulating oil layer can isolate the first and second adhesive layers, preventing them from wetting the cotton paper substrate layer and migrating to each other. This helps maintain the stability and reliability of the peel force performance on both sides of the double-sided adhesive tape, ensuring that the label roll maintains the expected peeling effect throughout its entire service life.

[0018] In the label paper roll of this application embodiment, double-sided adhesive tapes with different peel forces on both sides are used to bond the tube core and the label paper respectively, so that when the label paper is used up, its end can be smoothly separated from the double-sided adhesive tape and the tube core, making it easier for the sensor to detect the paperless state and control the print head assembly to stop heating in time, thereby improving the situation of overheating and breakage of the ribbon. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a double-sided tape according to an embodiment of this application; Figure 2 This is a cross-sectional view of a double-sided adhesive tape according to an embodiment of this application; Figure 3 This is a cross-sectional view of another embodiment of the double-sided adhesive tape of this application; Figure 4 This is a flowchart illustrating a method for preparing double-sided adhesive tape according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a label paper roll according to an embodiment of this application.

[0021] Figure label: 1. Label roll; 10. Double-sided tape; 11. Tissue paper substrate layer; 12. First adhesive layer; 13. Second adhesive layer; 14. Isolation oil layer; 15. Release paper layer; 20. Core; 30. Label paper; X, Thickness direction of the tissue paper substrate layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] In label roll and ribbon packaging applications, the tape and core are typically bonded together with adhesive or double-sided tape. However, the strong adhesive force of these materials can cause the printer rollers to fail to separate the tape from the core as it is consumed during printing, rendering the tape near the core unusable. Simultaneously, the ribbon is prone to breakage due to continuous heating. To address this issue, related technologies have proposed using transparent PET (Polyethylene terephthalate) guide tape to connect the tape and core, ensuring full utilization of the tape at the end and facilitating timely detection of paperless states by the printer. This solution requires a dedicated guide tape attachment device with a length of 100mm-150mm, increasing production costs and impacting overall production efficiency. Therefore, this application provides a double-sided adhesive tape, a method for preparing the double-sided adhesive tape, and a label roll.

[0024] Please see Figure 1 and Figure 2 Double-sided tape 10 is used for label roll 1. Double-sided tape 10 includes a cotton paper substrate layer 11, a first adhesive layer 12, a second adhesive layer 13, and at least one release oil layer 14. The first adhesive layer 12 is located on one side of the cotton paper substrate layer 11 in the thickness direction X, and is used to bond the core 20 of the label roll 1. The second adhesive layer 13 is located on the other side of the cotton paper substrate layer 11 in the thickness direction X, and is used to bond the label paper 30 of the label roll 1. The peel force of the first adhesive layer 12 is greater than that of the second adhesive layer 13. Compared to a PET substrate layer, the cotton paper substrate layer 11 is easier to tear and can be manually cut without additional tools, thus making double-sided tape 10 convenient for the assembly and processing of label roll 1. In this embodiment, by controlling the difference in peel force between the first adhesive layer 12 and the second adhesive layer 13, a stable connection is formed between the first adhesive layer 12 and the core 20, and a relatively easy-to-peel connection is formed between the second adhesive layer 13 and the label paper 30. Thus, when the label paper 30 reaches the end of its use, it can smoothly detach from the double-sided tape 10 and the core 20, allowing the printer to promptly detect the paperless state and stop printing, helping to reduce the possibility of ribbon overheating and breakage.

[0025] In this embodiment, the double-sided tape 10 includes at least one insulating oil layer 14. The insulating oil layer 14 is used to isolate the first adhesive layer 12 and the second adhesive layer 13, preventing the first adhesive layer 12 and the second adhesive layer 13 from wetting and migrating to each other during storage or use. Optionally, as... Figure 2 As shown, the double-sided tape 10 can have a layer of insulating oil 14. For example, the insulating oil 14 is disposed between the cotton paper substrate layer 11 and the first adhesive layer 12 in the thickness direction X of the cotton paper substrate layer 11, or the insulating oil 14 is disposed between the cotton paper substrate layer 11 and the second adhesive layer 13 in the thickness direction X of the cotton paper substrate layer 11. Optionally, as shown... Figure 3 As shown, the double-sided tape 10 can also be provided with two layers of separating oil layers 14 in the thickness direction X of the cotton paper substrate layer 11. One layer of separating oil layer 14 is disposed between the cotton paper substrate layer 11 and the first adhesive layer 12, and the other layer of separating oil layer 14 is disposed between the cotton paper substrate layer 11 and the second adhesive layer 13. In this way, by providing separating oil layers 14, the double-sided tape 10 can maintain the difference in peel force on both sides for a long time, and the label roll 1 can maintain the expected peel effect throughout the entire service life.

[0026] In the embodiments of this application, the peel force is used to evaluate the peel resistance of the adhesive layer under external force. The peel force refers to the force required to peel the material from the adhesive surface by a unit length. In practical applications, the peel force of the first adhesive layer 12 and the second adhesive layer 13 can be determined by peel force testing.

[0027] In some embodiments, the isolation oil layer 14 is a UV-curable ink layer. Under UV light irradiation, the UV-curable ink layer undergoes a photopolymerization reaction, rapidly curing and forming a dense barrier layer. This effectively inhibits the migration of two adhesive molecules of different polarities through the cotton paper fibers. The isolation oil layer 14 includes at least one of a polyurethane acrylate ink layer, an epoxy acrylate ink layer, or a polyester acrylate ink layer. Optionally, the isolation oil layer 14 can be a polyurethane acrylate ink layer. The polyurethane acrylate ink layer has good flexibility, strong adhesion to the cotton paper substrate layer 11, and good isolation performance, thus stably separating the first adhesive layer 12 and the second adhesive layer 13.

[0028] In actual manufacturing, when the double-sided tape 10 is provided with a single layer of release varnish 14, one of the aforementioned ink layers can be selected. For example, the release varnish 14 can be a polyester acrylate ink layer with good coatability, or a polyurethane acrylate ink layer. Of course, when the double-sided tape 10 is provided with multiple layers of release varnish 14, the multiple layers of release varnish 14 can be one or more of the aforementioned ink layers. For example, all of the multiple layers of release varnish 14 may be polyurethane acrylate ink layers, or a portion of the multiple layers of release varnish 14 may be polyurethane acrylate ink layers and another portion may be polyester acrylate ink layers.

[0029] In some embodiments, the thickness of the isolation oil layer 14 in the thickness direction X of the cotton paper substrate layer 11 is H, where H satisfies: 3μm ≤ H ≤ 10μm. For example, H can be 3μm, 5μm, 8μm, 10μm, or any range thereof. By controlling the thickness H of the isolation oil layer 14 to satisfy the above condition, the isolation oil layer 14 can form a continuous and non-porous film structure, effectively preventing the migration of adhesive layer molecules along the cotton paper fibers on both sides, while also maintaining flexibility. If H < 3μm, the isolation oil layer 14 is too thin, and the barrier layer formed after ink curing may form pinholes, leading to barrier failure; if H > 10μm, the isolation oil layer 14 is too thick, resulting in poor flexibility and poor processing adaptability of the double-sided tape 10.

[0030] In the double-sided tape 10, the cotton paper substrate layer 11 provides a bearing base for the coating of the ink layer and the adhesive layer, and the cotton paper substrate layer 11 provides mechanical strength to the double-sided tape 10 to resist deformation and breakage of the double-sided tape 10 during processing and use.

[0031] In some embodiments, the basis weight of the cotton paper substrate layer 11 is G, where G satisfies: 60 g / m³ 2 ≤G≤80g / m 2 For example, G can be 60 g / m³ 2 70g / m 2 80g / m 2 Alternatively, within either of the above two ranges, by controlling the basis weight G of the cotton paper substrate layer 11 to satisfy the above conditions, the cotton paper substrate layer 11 takes into account both mechanical strength and tearability, and can resist the deformation and breakage of the double-sided tape 10 during processing and use, while ensuring that the double-sided tape 10 is easy to tear when manually cut. At the same time, the coating load-bearing capacity of the cotton paper substrate layer 11 is good, so that the adhesive layer is stably distributed on the cotton paper substrate layer 11.

[0032] In some embodiments, the thickness of the cotton paper substrate layer 11 is S, where S satisfies: 0.05mm≤S≤0.08mm. For example, S can be 0.05mm, 0.06mm, 0.08mm or any range thereof. By controlling the thickness S of the cotton paper substrate layer 11 to satisfy the above condition, the cotton paper substrate layer 11 has sufficient mechanical strength and flexibility, and good processing adaptability.

[0033] In this embodiment, the peel force of the first adhesive layer 12 is F1, which satisfies: 7N≤F1≤8N. By controlling the peel force F1 of the first adhesive layer 12 to satisfy the above condition, the first adhesive layer 12 and the core 20 form a stable adhesive connection, which is not easy to loosen during the production, storage and use of the label paper roll 1.

[0034] It should be noted that the embodiments of this application use a 90° peel force test, that is, peel force refers to the force required to peel the adhesive layer of an object label at a 90° angle. Taking the peel force test of the first adhesive layer 12 as an example, the first adhesive layer 12 of a double-sided tape 10 of a preset length is bonded to a steel plate, the steel plate is fixed in the instrument, and the instrument is placed on the fixed fixture of the testing machine. The free end of the double-sided tape 10 is fixed to the movable fixture, and the double-sided tape 10 is peeled vertically from the surface of the steel plate. By moving the steel plate horizontally, the steel plate and the double-sided tape 10 are kept at a 90° angle. The tensile force value obtained is the peel force F1.

[0035] In some embodiments, in the thickness direction X of the cotton paper substrate layer 11, the thickness of the first adhesive layer 12 is D1, where D1 satisfies: 18μm≤D1≤30μm. For example, D1 can be 18μm, 20μm, 25μm, 30μm, or any range thereof. By controlling the thickness D1 of the first adhesive layer 12 to satisfy the above condition, the adhesive is uniformly applied during the processing of the double-sided tape 10 to form the first adhesive layer 12, and the first adhesive layer 12 can maintain the expected peel strength performance.

[0036] In some embodiments, the first adhesive layer 12 is a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is sensitive to pressure; only a light finger pressure is required for it to bond tightly to the object being adhered to. Exemplarily, the first adhesive layer 12 is at least one of an acrylic adhesive layer, a rubber adhesive layer, or a silicone adhesive layer. For example, the first adhesive layer 12 can be an acrylic adhesive layer, which has good adhesion and aging resistance to various substrates, extending the service life of the double-sided tape 10 while ensuring a stable bond.

[0037] In this embodiment, the peel force of the second adhesive layer 13 is lower than that of the first adhesive layer 12. The peel force of the second adhesive layer 13 is F2, and F1 satisfies: 2N≤F2≤3N. By controlling the peel force F2 of the second adhesive layer 13 to satisfy the above condition, during the printing process, the label paper 30 can be normally wound around the core 20 and is not easy to loosen. At the same time, a relatively easy-to-peel connection is formed between the second adhesive layer 13 and the label paper 30. When the label paper 30 is about to be consumed, the tension of the printing roller can easily separate the end of the label paper 30 from the second adhesive layer 13.

[0038] In some embodiments, in the thickness direction X of the cotton paper substrate layer 11, the thickness of the second adhesive layer 13 is D2, where D2 satisfies: 15μm≤D2≤30μm. For example, D2 can be 15μm, 20μm, 25μm, 30μm, or any range thereof. By controlling the thickness D2 of the second adhesive layer 13 to satisfy the above condition, the adhesive is uniformly applied during the processing of the double-sided tape 10 to form the second adhesive layer 13, and the second adhesive layer 13 can maintain the expected peel strength performance.

[0039] For example, the second adhesive layer 13 is an acrylic adhesive layer, a removable rubber adhesive layer, or a synthetic rubber type adhesive layer. For instance, the second adhesive layer 13 can be a low-tack acrylic adhesive layer to achieve a stable and uniform bonding effect.

[0040] In some embodiments, the peel force of the first adhesive layer 12 is F1, and the peel force of the second adhesive layer 13 is F2. F1 and F2 satisfy: F1-F2≥5N. By controlling F1 and F2 to satisfy the above condition, the first adhesive layer 12 and the second adhesive layer 13 form a significant difference in peel force, so that when the double-sided tape 10 is used for the label paper roll 1, the end of the label paper 30 can be smoothly detached from the double-sided tape 10.

[0041] In some embodiments, the double-sided tape 10 further includes at least one release paper layer 15, which is used to isolate the first adhesive layer 12 and the second adhesive layer 13 from the external environment. Optionally, the double-sided tape 10 includes a release paper layer 15, which is bonded to the first adhesive layer 12, or the release paper layer 15 is bonded to the second adhesive layer 13. In this case, the double-sided tape 10 is configured to be housed into multiple layers of tape units, such as a wound structure. The multi-layer wound configuration does not affect the peel performance and ease of use of the double-sided tape 10. The release paper layer 15 of each tape unit is in contact with the tape unit of the adjacent layer to avoid the adhesive layers in the tape unit of the adjacent layer from sticking together.

[0042] In other embodiments, the double-sided tape 10 includes two release paper layers 15, one release paper layer 15 being bonded to the first adhesive layer 12 and the other release paper layer 15 being bonded to the second adhesive layer 13. The double-sided tape 10 can be stored by winding or stacking.

[0043] Please see Figure 4 This application also provides a method for preparing double-sided adhesive tape 10. The preparation method is used to prepare the above-mentioned double-sided adhesive tape 10, and the preparation method includes the following steps: Step S100: Provide the cotton paper substrate layer 11.

[0044] Step S200: Apply UV-curable ink to the surface of the cotton paper substrate layer 11 and perform a curing reaction under UV light to obtain a cured ink layer, which includes an isolation oil layer 14 formed by the UV-curable ink.

[0045] Step S300: Apply the first adhesive and the second adhesive to the opposite surfaces of the cured ink layer, and perform a drying process to obtain a double-sided tape 10. The double-sided tape 10 includes a first adhesive layer 12 formed by curing the first adhesive and a second adhesive layer 13 formed by curing the second adhesive.

[0046] In some embodiments, the preparation method further includes step S400, attaching a release paper layer 15 to the surface of at least one of the first adhesive layer 12 and the second adhesive layer 13, winding and cutting to obtain a double-sided tape of a predetermined width.

[0047] For example, a weight of 60 g / m³ is selected. 2 A UV-curable polyurethane acrylate release ink is printed on the surface of the cotton paper substrate layer 11 using an anilox roller. The coating thickness is approximately 8 μm. It is then cured using a 120W UV mercury lamp to obtain a cured ink layer. The UV-curable polyurethane acrylate release ink forms a release oil layer 14 after UV curing. A high-viscosity acrylic pressure-sensitive adhesive is coated on the unprinted side of the cotton paper substrate layer 11 and cured at 130°C for 2 minutes to form a first adhesive layer 12. A low-viscosity acrylic pressure-sensitive adhesive is coated on the surface of the release oil layer 14 and cured at 100°C for 1.5 minutes to form a second adhesive layer 13. Release paper layers are then adhered to the surfaces of the first adhesive layer 12 and the second adhesive layer 13, and the mixture is wound and cut into double-sided rolls with a width of 10 mm.

[0048] Please see Figure 2 and Figure 5This application also provides a label paper roll 1, which includes a core 20, label paper 30, and double-sided adhesive tape 10. The first adhesive layer 12 of the double-sided adhesive tape 10 is bonded to the core 20 of the label paper roll 1, and the second adhesive layer 13 is bonded to the end of the label paper 30. The label paper 30 is wound around the core 20. Thus, the label paper roll 1 uses double-sided adhesive tape 10 with different peel forces on both sides to bond the core 20 and the label paper 30 respectively, so that when the label paper 30 is exhausted, its end can easily detach from the double-sided adhesive tape 10 and the core 20. This facilitates the printer's sensor to detect the paperless state and promptly control the printhead assembly to stop heating, thereby improving the situation of ribbon overheating and breakage. The label paper 30 is bonded to the second adhesive layer 13, which prevents the double-sided adhesive tape 10 from detaching from the core 20 and entering the printing area with the label paper 30, thus affecting the printing effect.

[0049] In some embodiments, along the extending direction of the label paper 30, the length of the end portion of the label paper 30 bonded to the second adhesive layer 13 is A, where A satisfies: 5mm ≤ A ≤ 10mm. For example, A can be 5mm, 8mm, 10mm, or any of the above ranges. By controlling the length A to satisfy the above condition, the end of the label paper 30 can be smoothly peeled off from the double-sided tape 10 after being pulled by the printing roller. If A > 10mm, the bonding length between the label paper 30 and the second adhesive layer 13 is too long, making it difficult for the end of the label paper 30 to detach. If A < 5mm, the bonding between the label paper 30 and the second adhesive layer 13 is unstable, and the label paper 30 is prone to loosening during winding and printing.

[0050] In some embodiments, along the extending direction of the label paper 30, the end edge of the label paper 30 is flush with the edge of the double-sided tape 10, or the end edge of the label paper 30 extends beyond the edge of the double-sided tape 10. That is, the double-sided tape 10 does not extend beyond the end edge of the label paper 30 to avoid the double-sided tape 10 sticking to the label paper 30 wound around the inner ring.

[0051] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-sided adhesive tape, characterized in that, The double-sided adhesive tape is used for label paper rolls and includes: The cotton paper substrate layer; The first adhesive layer is disposed on one side of the cotton paper substrate layer in the thickness direction of the cotton paper substrate layer and is used to bond the core of the label paper roll. A second adhesive layer is disposed on the other side of the cotton paper substrate layer in the thickness direction of the cotton paper substrate layer, and is used to bond the label paper to the label paper roll, wherein the peel force of the first adhesive layer is greater than the peel force of the second adhesive layer; and At least one insulating oil layer is provided in the thickness direction of the cotton paper substrate layer, the insulating oil layer is disposed between the cotton paper substrate layer and the first adhesive layer, and / or, the insulating oil layer is disposed between the cotton paper substrate layer and the second adhesive layer, and the insulating oil layer is configured to isolate the first adhesive layer and the second adhesive layer.

2. The double-sided tape according to claim 1, characterized in that, The isolation oil layer is a UV-curable ink layer, and the isolation oil layer includes at least one of a polyurethane acrylate ink layer, an epoxy acrylate ink layer, or a polyester acrylate ink layer.

3. The double-sided tape according to claim 1, characterized in that, In the thickness direction of the cotton paper substrate layer, the thickness of the isolation oil layer is H, where H satisfies: 3μm≤H≤10μm.

4. The double-sided tape according to claim 1, characterized in that, The basis weight of the cotton paper substrate layer is G, and G satisfies: 60 g / m³ 2 ≤G≤80g / m 2 ; and / or, The thickness of the cotton paper substrate layer is S, and S satisfies: 0.05mm≤S≤0.08mm.

5. The double-sided tape according to claim 1, characterized in that, The peel force of the first adhesive layer is F1, which satisfies: 7N ≤ F1 ≤ 8N; and / or, In the thickness direction of the cotton paper substrate layer, the thickness of the first adhesive layer is D1, and D1 satisfies: 18μm≤D1≤30μm.

6. The double-sided tape according to claim 1, characterized in that, The first adhesive layer is a pressure-sensitive adhesive layer, and the first adhesive layer is an acrylic adhesive layer, a rubber adhesive layer, or an organosilicon adhesive layer.

7. The double-sided tape according to claim 1, characterized in that, The peel force of the second adhesive layer is F2, and F1 satisfies: 2N ≤ F2 ≤ 3N; and / or, In the thickness direction of the cotton paper substrate layer, the thickness of the second adhesive layer is D2, and D2 satisfies: 15μm≤D2≤30μm.

8. The double-sided adhesive tape according to claim 1, characterized in that, The second adhesive layer is an acrylic adhesive layer, a removable rubber adhesive layer, or a synthetic rubber adhesive layer.

9. The double-sided tape according to any one of claims 1-8, characterized in that, The peel force of the first adhesive layer is F1, and the peel force of the second adhesive layer is F2. F1 and F2 satisfy: F1-F2≥5N.

10. The double-sided adhesive tape according to claim 1, characterized in that, The double-sided tape further includes at least one release paper layer, which is bonded to the first adhesive layer; and / or, the release paper layer is bonded to the second adhesive layer, wherein the release paper layer is used to isolate the first adhesive layer and the second adhesive layer from the external environment; The double-sided tape is configured to be able to be packed into multiple layers of tape units, with the release paper layer of each layer of tape unit in contact with the tape unit of the adjacent layer.

11. A label paper roll, characterized in that, The device includes a core, label paper, and double-sided tape as described in any one of claims 1-9, wherein a first adhesive layer of the double-sided tape is bonded to the core of the label paper roll, and a second adhesive layer is bonded to the end of the label paper, the label paper being wound around the core.

12. The label roll according to claim 11, characterized in that, Along the extension direction of the label paper, the length of the end portion of the label paper bonded to the second adhesive layer is A, where A satisfies: 5mm≤A≤10mm.

13. The label roll according to claim 11, characterized in that, Along the extending direction of the label paper, the end edge of the label paper is flush with the edge of the double-sided tape, or the end edge of the label paper extends beyond the edge of the double-sided tape.

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