Adhesive tape structure

Abstract

The utility model discloses a kind of adhesive tape structures, it is related to adhesive tape technical field, it includes double-sided release layer, composite layer, single-sided release layer and first adhesive layer sequentially stacked, wherein, composite layer includes third adhesive layer, substrate layer and second adhesive layer sequentially stacked, substrate layer is used to hinder second adhesive layer and third adhesive layer mutual penetration, can isolate the undesirable component of being pasted object, second adhesive layer and single-sided release layer one side release surface adhesion, first adhesive layer and single-sided release layer one side fixed surface fixed connection, third adhesive layer and double-sided release layer one side release surface adhesion, the width of composite layer is less than the width of single-sided release layer and the width of double-sided release layer respectively, carry out edge treatment, first adhesive layer is not easy to directly contact with third adhesive layer and occur adhesion, second adhesive layer is not easy to directly contact with first adhesive layer and occur adhesion, so can solve the problem of uncoiling.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape technology, and in particular to adhesive tape structure. Background Technology

[0002] Currently, after cotton is harvested using a cotton harvester, it is usually secured by wrapping film. After the cotton is wrapped, the ends of the wrapping film need to be sealed and secured with tape. To improve structural strength, existing tapes typically contain multiple layers of adhesive, with adjacent layers separated by a mesh fabric. Adhesive overflow and adhesion between adjacent layers can easily occur, leading to poor unwinding (adhesive layers make unwinding the tape roll more difficult). Furthermore, adjacent layers can easily permeate through the mesh fabric. If one layer contains undesirable components from the material being adhered to, these components can easily seep through the mesh fabric to the other layer, potentially damaging the adhesive properties and causing decreased adhesion, detachment, or release failure. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention proposes an adhesive tape structure.

[0004] The tape structure according to an embodiment of the present invention includes a double-sided release layer, a composite layer, a single-sided release layer, and a first adhesive layer stacked sequentially, wherein: The composite layer includes a third adhesive layer, a substrate layer, and a second adhesive layer, which are stacked sequentially from the double-sided release layer to the first adhesive layer. The substrate layer is used to prevent the second adhesive layer and the third adhesive layer from penetrating each other. The second adhesive layer is bonded to the release surface of one side of the single-sided release layer. The first adhesive layer is fixedly connected to the fixing surface of one side of the single-sided release layer. The third adhesive layer is bonded to the release surface of one side of the double-sided release layer. The width of the composite layer is smaller than the width of the single-sided release layer and the width of the double-sided release layer, respectively.

[0005] The tape structure according to the embodiments of this utility model has at least the following beneficial effects: 1. During operation, first tear out the tape structure, then peel off the double-sided release layer to expose the third adhesive layer. The third adhesive layer is bonded to the inner side of the end of the previous roll of packing film. Then, the first adhesive layer is bonded to the initial end of the next roll of packing film. Pulling both rolls of packing film separates the single-sided release layer from the second adhesive layer, exposing the second adhesive layer. Rewinding the previous roll of packing film bonds the second adhesive layer to the outer side, thus sealing and fixing the end of the previous roll. Since the width of the composite layer is smaller than both the width of the single-sided and double-sided release layers, it's equivalent to the entire composite layer being shrunk inwards. This is equivalent to leaving margins on both sides of the double-sided release layer, providing some space to accommodate excess adhesive. When the tape structure is wound, the first adhesive layer is less likely to directly contact and adhere to the third adhesive layer, and the second adhesive layer is also less likely to directly contact and adhere to the first adhesive layer. This solves the problem of poor unwinding. 2. By setting a substrate layer between the second and third adhesive layers, the substrate layer can isolate undesirable components of the object being bonded, such as plasticizers, and prevent these substances from penetrating the substrate layer and entering the second or third adhesive layer, thus avoiding a decrease in adhesion or even failure to adhere, peel off, or release failure. In addition, the substrate layer can also isolate the adhesive layer from the damage caused by ultraviolet rays in sunlight, blocking the damage caused by ultraviolet rays and preventing aging and other defects. 3. Since the substrate layer separates the second and third adhesive layers, the second and third adhesive layers will not permeate each other. The second and third adhesive layers can be designed with different performance characteristics. The pre-fixing layer (third adhesive layer) can use ordinary adhesive to reduce costs; the sealing layer (second adhesive layer) can use adhesive with special functions, such as adhesive with strong adhesion, high durability, and strong resistance to high and low temperatures, thereby improving the sealing performance of the packaging film.

[0006] In some embodiments, on either side of the width direction of the tape structure, the distance between the side edge of the double-sided release layer and the side edge of the composite layer ranges from 3mm to 10mm.

[0007] In some embodiments, the substrate layer is made of any one of cotton paper, non-woven fabric, plastic film, PE film, PP film, PET film, MOPP film, and BOPP film.

[0008] In some embodiments, the substrate layer is made of white PET film.

[0009] In some embodiments, the width of the single-sided release layer is 200mm, the width of the double-sided release layer ranges from 160mm to 196mm, and the distance between the side of the single-sided release layer and the side of the double-sided release layer ranges from 2mm to 20mm on any side of the width direction of the tape structure.

[0010] In some embodiments, the width of the second adhesive layer, the width of the substrate layer, and the width of the third adhesive layer are all the same.

[0011] In some embodiments, the single-sided release layer and the double-sided release layer are made of PET.

[0012] In some embodiments, the width of the single-sided release layer is greater than the width of the double-sided release layer, and the width of the first adhesive layer is equal to the width of the single-sided release layer.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a front view of the tape structure according to some embodiments of the present invention; Figure 2 This is a right view of the tape structure according to some embodiments of the present invention. Detailed Implementation

[0015] Reference Figure 1 As shown, this embodiment of the present invention provides a tape structure, which includes a double-sided release layer, a composite layer, a single-sided release layer, and a first adhesive layer stacked sequentially from bottom to top. This composite tape structure can be used to adhere and fix packaging films for agricultural products (such as cotton), and can also be used to adhere and fix other objects.

[0016] Reference Figure 1 As shown, both sides of the double-sided release layer are release surfaces, and both sides are coated with release agent. The upper release surface of the double-sided release layer is bonded to the composite layer, allowing the composite layer to be separated from the double-sided release layer. Figure 1 As shown, when the composite tape structure is in a wound state (unused state), the composite tape structure is wound around the outer circumference of the cylinder. The first adhesive layer located in the inner layer of the cylinder is directly bonded to the outer circumferential wall of the cylinder, while the first adhesive layer located in the outer layer of the cylinder is bonded to the release surface on the lower side of the double-sided release layer, allowing the double-sided release layer to be separated from the first adhesive layer. The upper side of the single-sided release layer is a fixed surface, and its lower side is a release surface coated with release agent. The lower release surface of the single-sided release layer is bonded to the composite layer, allowing the single-sided release layer to be separated from the composite layer. The fixed surface on the upper side of the single-sided release layer is fixedly bonded to the first adhesive layer, making the single-sided release layer inseparable from the first adhesive layer.

[0017] Specifically, refer to Figure 1As shown, the composite layer includes a third adhesive layer, a substrate layer, and a second adhesive layer, which are stacked sequentially from the double-sided release layer to the first adhesive layer. The second adhesive layer is bonded to the release surface on one side of the single-sided release layer, the first adhesive layer is fixedly connected to the fixing surface on the other side of the single-sided release layer, and the third adhesive layer is bonded to the release surface on one side of the double-sided release layer. When the composite tape structure is in a wound state, the side of the first adhesive layer away from the single-sided release layer will bond to the release surface on the lower side of the double-sided release layer.

[0018] When using this composite tape structure, the operator first tears the tape structure and peels off the double-sided release layer to expose the third adhesive layer. The third adhesive layer is then bonded to the inner side of the end of the previous roll of packing film. Next, the first adhesive layer is bonded to the initial end of the next roll of packing film. Then, the two rolls of packing film are pulled to separate the single-sided release layer from the second adhesive layer, exposing the second adhesive layer. By rewinding the previous roll of packing film, the second adhesive layer is bonded to the outer side of the previous roll of packing film, thereby sealing the end of the previous roll of packing film with the outer side of the packing film, thus achieving tight binding and fixation of the packing film.

[0019] Reference Figure 2 As shown, the width of the composite layer is smaller than the width of the single-sided release layer and the width of the double-sided release layer, respectively. This can be understood as the composite layer shrinking inward, forming an inward-shrinking structure. When the composite tape structure is in a wound state, the inward shrinkage of the composite layer due to its reduced width is equivalent to leaving edges on both sides of the double-sided release layer, providing a certain amount of space. This space can accommodate some excess adhesive, making it less likely for the first adhesive layer to directly contact and adhere to the third adhesive layer, and the second adhesive layer to directly contact and adhere to the first adhesive layer. This solves the problem of poor unwinding (the unwinding operation mainly involves the ease of peeling between the single-sided release layer and the second adhesive layer, as well as the ease of peeling between the double-sided release layer and the third and first adhesive layers).

[0020] Existing composite tapes generally suffer from the following problems: 1. The sealing layer has poor low-temperature performance and cannot cover the temperature resistance range of -5℃ to 60℃ required by customers. The packaging and sealing will fail in low-temperature environments. 2. The adhesive layer in the existing technology cannot meet the requirement of not losing its tack after being placed outdoors for 2 months; 3. The existing composite adhesive layer has insufficient adhesion. Because its substrate is a mesh cloth, only the same type of adhesive can be used. It is not possible to apply different adhesives to both sides of the double-sided adhesive, which cannot meet the adhesion requirements of customers in the market and often results in bonding failure.

[0021] It should be noted that, for the composite tape structure of this embodiment, the substrate layer is a solid material. The substrate layer can be made of any of the following materials: cotton paper, non-woven fabric, plastic film, or PE / PP / PET / MOPP / BOPP film. The function of the substrate layer is to separate the second and third adhesive layers, preventing them from penetrating each other. It can also isolate any undesirable components of the substrate on either adhesive layer, such as plasticizers, preventing these substances from penetrating through the substrate layer into the interior of the second or third adhesive layer and damaging the adhesive properties, leading to decreased adhesion or even failure to adhere, detachment, or release kink. Furthermore, the substrate layer can also strengthen the structural strength of the composite layer.

[0022] It should also be noted that, since the substrate layer separates the second and third adhesive layers, the second and third adhesive layers will not permeate each other. The second and third adhesive layers can be designed with different performance characteristics. The pre-fixing layer (third adhesive layer) can use ordinary adhesive to reduce costs; the sealing layer (second adhesive layer) can use adhesive with special functions, such as adhesive with strong adhesion, high durability, and strong resistance to high and low temperatures, thereby improving the sealing performance of the packaging film.

[0023] Reference Figure 2 As shown, in some embodiments, the width of the single-sided release layer is greater than the width of the double-sided release layer, and the width of the first adhesive layer can be equal to the width of the single-sided release layer. This arrangement allows the width of the first adhesive layer to be greater than the width of the composite layer, resulting in a stronger bond between the first adhesive layer and the subsequent roll of packing film. This can be understood as the first adhesive layer being fully coated on the single-sided release layer, resulting in a larger area and better fixation, which facilitates the smooth separation of the single-sided release layer and the second adhesive layer during the winding of the packing film.

[0024] Reference Figure 2 As shown, in some embodiments, along any side of the width direction of the tape structure, the distance between the side of the double-sided release layer and the side of the composite layer in the width direction of the composite tape structure is C1, and the value of C1 can be in the range of 3mm-10mm.

[0025] In some embodiments, the substrate layer is made of white PET film, which has a high opacity and can block ultraviolet rays from damaging the adhesive layer, preventing aging and other defects. In other embodiments, the substrate layer may also be made of other colors or transparent PET film.

[0026] In some embodiments, the width of the single-sided release layer is 200mm, and the width of the double-sided release layer ranges from 160mm to 196mm. Along any side of the width direction of the tape structure, the distance between the side edges of the single-sided release layer and the double-sided release layer in the width direction of the composite tape structure is C2, which can range from 2mm to 20mm. Whether the side edge width C2 of the double-sided release layer is consistent depends on customer requirements; they may be the same or one may be larger than the other.

[0027] In some embodiments, the widths of the second adhesive layer, the substrate layer, and the third adhesive layer are all the same. This can be understood as the second and third adhesive layers being fully coated relative to the substrate layer, maximizing their area and thus improving the bonding and securing effect of the composite layer on the packaging film. If the width of the substrate layer is smaller than the widths of the second and third adhesive layers, the thinner substrate layer may be more prone to cracking during manufacturing.

[0028] In some embodiments, both the single-sided release layer and the double-sided release layer can be made of PET, which has good structural strength.

[0029] Examples of the embodiments described above are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described above with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A tape structure, characterized in that, It includes a double-sided release layer, a composite layer, a single-sided release layer, and a first adhesive layer stacked sequentially, wherein: The composite layer includes a third adhesive layer, a substrate layer, and a second adhesive layer, which are stacked sequentially from the double-sided release layer to the first adhesive layer. The substrate layer is used to prevent the second adhesive layer and the third adhesive layer from penetrating each other. The second adhesive layer is bonded to the release surface of one side of the single-sided release layer. The first adhesive layer is fixedly connected to the fixing surface of one side of the single-sided release layer. The third adhesive layer is bonded to the release surface of one side of the double-sided release layer. The width of the composite layer is smaller than the width of the single-sided release layer and the width of the double-sided release layer, respectively.

2. The tape structure according to claim 1, characterized in that, On any side of the width direction of the tape structure, the distance between the side edge of the double-sided release layer and the side edge of the composite layer ranges from 3mm to 10mm.

3. The tape structure according to claim 1, characterized in that, The substrate layer is made of any one of cotton paper, non-woven fabric, plastic film, or PE / PP / PET / MOPP / BOPP film.

4. The tape structure according to claim 3, characterized in that, The substrate layer is made of white PET film.

5. The tape structure according to claim 1, characterized in that, The width of the single-sided release layer is 200mm, and the width of the double-sided release layer ranges from 160mm to 196mm. On any side of the width direction of the tape structure, the distance between the side of the single-sided release layer and the side of the double-sided release layer ranges from 2mm to 20mm.

6. The tape structure according to claim 1, characterized in that, The widths of the second adhesive layer, the substrate layer, and the third adhesive layer are all the same.

7. The tape structure according to claim 1, characterized in that, The single-sided release layer and the double-sided release layer are made of PET.

8. The tape structure according to claim 1, characterized in that, The width of the single-sided release layer is greater than the width of the double-sided release layer, and the width of the first adhesive layer is equal to the width of the single-sided release layer.

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